Now Stable

"New on the Web": For a given set of browsers, what APIs became stable and when, ordered reverse chronologically.

It's a great source of information for posts like this

Example Comparisons
Browsers
Features

Stable APIs

Below is a list of features that are in Firefox and Safari, ordered reverse chronologically by when they became stable (i.e, available in the last browser).

2026/3

API First Browser Date Last Browser Date Days Notes
api.ShadowRoot.referenceTarget Safari9/15/2025 Firefox3/24/2026190
html.elements.template.shadowrootreferencetarget Safari9/15/2025 Firefox3/24/2026190

2026/2

API First Browser Date Last Browser Date Days Notes
api.Location.ancestorOrigins πŸ“‹Safari7/25/2012 Firefox2/24/20264962
Deno: This value is always empty in Deno.
api.TrustedHTML πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedHTML.toJSON πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedHTML.toString πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScript πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScript.toJSON πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScript.toString πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScriptURL πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScriptURL.toJSON πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedScriptURL.toString πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicy πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicy.createHTML πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicy.createScript πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicy.createScriptURL πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicy.name πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.createPolicy πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.defaultPolicy πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.emptyHTML πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.emptyScript πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.getAttributeType πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.getPropertyType πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.isHTML πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.isScript πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.TrustedTypePolicyFactory.isScriptURL πŸ“‹Safari9/15/2025 Firefox2/24/2026162
api.trustedTypes πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-area.block-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.block-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.bottom πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When bottom is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.inline-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.inline-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.left πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When left is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.right πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When right is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-block-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-block-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-block-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-block-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-inline-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-inline-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-inline-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-inline-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-x-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-x-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-y-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.self-y-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.top πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When top is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.x-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.x-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.y-end πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.y-start πŸ“‹Safari9/15/2025 Firefox2/24/2026162
Chrome: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try.self-x-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try.self-x-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try.self-y-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try.self-y-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try-fallbacks.self-x-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try-fallbacks.self-x-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-x-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When x-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try-fallbacks.self-y-end πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-end is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try-fallbacks.self-y-start πŸ“‹Safari12/12/2025 Firefox2/24/202674
Chrome: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When self-y-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: When y-self-start is used as a single keyword, or alongside span-all, it unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-try-order πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-try-order.most-block-size πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-try-order.most-height πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-try-order.most-inline-size πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-try-order.most-width πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.properties.position-try-order.normal πŸ“‹Safari9/15/2025 Firefox2/24/2026162
css.types.basic-shape.shape πŸ“‹Safari3/31/2025 Firefox2/24/2026330
html.elements.details.search_match_opens Safari12/12/2025 Firefox2/24/202674
Firefox: The browser does not correctly scroll to the matching text. See bug 2006040.Firefox for Android: The browser does not correctly scroll to the matching text. See bug 2006040.Safari: The browser does not correctly scroll to the matching text. See bug 304174.Safari on iOS: The browser does not correctly scroll to the matching text. See bug 304174.WebView on iOS: The browser does not correctly scroll to the matching text. See bug 304174.
html.global_attributes.hidden.until-found πŸ“‹Safari12/12/2025 Firefox2/24/202674
Firefox: The browser does not correctly scroll to the matching text. See bug 2006040.Firefox for Android: The browser does not correctly scroll to the matching text. See bug 2006040.Safari: The browser does not correctly scroll to the matching text. See bug 304174.Safari on iOS: The browser does not correctly scroll to the matching text. See bug 304174.WebView on iOS: The browser does not correctly scroll to the matching text. See bug 304174.
javascript.builtins.RegExp.compile.rexexp_legacy_features Safari7/20/2022 Firefox2/24/20261315
http.headers.Accept-Encoding.zstd πŸ“‹Firefox5/14/2024 Safari2/11/2026638
Safari: Before macOS 26.3 Tahoe, this header value is not sent.
http.headers.Content-Encoding.zstd πŸ“‹Firefox5/14/2024 Safari2/11/2026638
Safari: Before macOS 26.3 Tahoe, Safari cannot decode Zstandard responses.

2026/1

API First Browser Date Last Browser Date Days Notes
api.CSSPositionTryDescriptors πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.align-self πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.alignSelf πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.block-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.blockSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.height πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inline-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inlineSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-block πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-inline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.inset-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetBlock πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetBlockEnd πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetBlockStart πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetInline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetInlineEnd πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.insetInlineStart πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.justify-self πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.justifySelf πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-block πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-inline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.margin-top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginBlock πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginBlockEnd πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginBlockStart πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginBottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginInline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginInlineEnd πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginInlineStart πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginLeft πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginRight πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.marginTop πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.max-block-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.max-height πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.max-inline-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.max-width πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.maxBlockSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.maxHeight πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.maxInlineSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.maxWidth πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.min-block-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.min-height πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.min-inline-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.min-width πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.minBlockSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.minHeight πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.minInlineSize πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.minWidth πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.place-self πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.placeSelf πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.position-anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.position-area πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.positionAnchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.positionArea πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryDescriptors.width πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryRule πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryRule.name πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CSSPositionTryRule.style πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.CompressionStream.CompressionStream.brotli Safari3/31/2025 Firefox1/13/2026288
api.DecompressionStream.DecompressionStream.brotli Safari3/31/2025 Firefox1/13/2026288
api.Document.activeViewTransition πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Document.startViewTransition.options_parameter πŸ“‹Safari12/11/2024 Firefox1/13/2026398
api.Document.startViewTransition.options_parameter.types_parameter πŸ“‹Safari12/11/2024 Firefox1/13/2026398
api.Document.startViewTransition.options_parameter.update_parameter πŸ“‹Safari12/11/2024 Firefox1/13/2026398
api.HTMLButtonElement.commandForElement.implicit_anchor_reference πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.HTMLButtonElement.popoverTargetElement.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.HTMLElement.showPopover.options_source_parameter.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.HTMLElement.togglePopover.options_source_parameter.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.HTMLInputElement.popoverTargetElement.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
api.NavigateEvent πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.NavigateEvent πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.canIntercept πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.destination πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.downloadRequest πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.formData πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.hasUAVisualTransition πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.hashChange πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.info πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.intercept πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.navigationType πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.scroll πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.signal πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.sourceElement πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigateEvent.userInitiated πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.activation πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.back πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.canGoBack πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.canGoForward πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.currentEntry πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.currententrychange_event πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.entries πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.forward πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.navigate πŸ“‹Safari12/12/2025 Firefox1/13/202632
Chrome: Chrome allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Chrome Android: Chrome Android allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Edge: Edge allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Quest Browser: Quest Browser allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Opera: Opera allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Opera Android: Opera Android allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).Samsung Internet: Samsung Internet allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).WebView Android: WebView Android allows javascript: URLs when calling navigate(), contrary to the specification (bug 439994590).
api.Navigation.navigate_event πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.navigateerror_event πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.navigatesuccess_event πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.reload πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.transition πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.traverseTo πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.Navigation.updateCurrentEntry πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationActivation πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationActivation.entry πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationActivation.from πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationActivation.navigationType πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationCurrentEntryChangeEvent πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationCurrentEntryChangeEvent.NavigationCurrentEntryChangeEvent πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationCurrentEntryChangeEvent.from πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationCurrentEntryChangeEvent.navigationType πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.getState πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.id πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.index πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.key πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.sameDocument πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationDestination.url πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.dispose_event πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.getState πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.id πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.index πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.key πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.sameDocument πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationHistoryEntry.url πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationTransition πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationTransition.finished πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationTransition.from πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.NavigationTransition.navigationType πŸ“‹Safari12/12/2025 Firefox1/13/202632
api.ServiceWorker.ecmascript_modules Safari9/20/2021 Firefox1/13/20261576
Safari: Nested workers support was introduced in Safari 15.5.Safari: Script loading in nested workers was introduced in Safari 16.4.Safari on iOS: Nested workers support was introduced in Safari on iOS 15.5.Safari on iOS: Script loading in nested workers was introduced in Safari on iOS 16.4.
api.ViewTransition.types πŸ“‹Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet πŸ“‹Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.@@iterator Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.add Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.clear Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.delete Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.entries Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.forEach Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.has Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.keys Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.size Safari12/11/2024 Firefox1/13/2026398
api.ViewTransitionTypeSet.values Safari12/11/2024 Firefox1/13/2026398
api.Window.navigation πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.at-rules.position-try πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.align-items.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.align-self.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.anchor-name πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.anchor-name.none πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.anchor-scope πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.anchor-scope.all πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.anchor-scope.none πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.block-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.bottom.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.bottom.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.height.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inline-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block-end.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block-end.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block-start.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-block-start.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline-end.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline-end.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline-start.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.inset-inline-start.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.justify-items.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.justify-self.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.left.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.left.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-block.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-block-end.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-block-start.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-bottom.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-inline.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-inline-end.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-inline-start.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-left.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-right.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.margin-top.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.max-block-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.max-height.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.max-inline-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.max-width.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.min-block-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.min-height.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.min-inline-size.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.min-width.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.place-items.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.place-self.anchor-center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-anchor.auto πŸ“‹Safari9/15/2025 Firefox1/13/2026120
Chrome: The generic auto value exists, but it does not yet have the effect described in the spec.Chrome Android: The generic auto value exists, but it does not yet have the effect described in the spec.Edge: The generic auto value exists, but it does not yet have the effect described in the spec.Opera: The generic auto value exists, but it does not yet have the effect described in the spec.Opera Android: The generic auto value exists, but it does not yet have the effect described in the spec.Samsung Internet: The generic auto value exists, but it does not yet have the effect described in the spec.WebView Android: The generic auto value exists, but it does not yet have the effect described in the spec.
css.properties.position-area πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.none πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-all πŸ“‹Safari9/15/2025 Firefox1/13/2026120
Chrome: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Chrome Android: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Edge: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Firefox: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Firefox for Android: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 2008537.Opera: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Opera Android: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.Samsung Internet: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.WebView Android: Using span-all unexpectedly allows the anchored box to overflow the viewport, obscuring content. Use place-self: anchor-center as a workaround. See bug 438334710.
css.properties.position-area.span-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-self-x-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-area.span-self-x-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-area.span-self-y-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-area.span-self-y-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-area.span-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-x-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-x-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-y-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.span-y-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-area.start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.flip-block πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.flip-inline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.flip-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.flip-x πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.flip-y πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.none πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.self-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-all πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-self-x-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.span-self-x-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.span-self-y-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.span-self-y-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try.span-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-x-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-x-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-y-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.span-y-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.x-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.x-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.y-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try.y-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.center πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.flip-block πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.flip-inline πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.flip-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.flip-x πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.flip-y πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.none πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.position-area πŸ“‹Safari9/15/2025 Firefox1/13/2026120
Chrome: inset-area values had to be wrapped inside an inset-area() function.Chrome Android: inset-area values had to be wrapped inside an inset-area() function.Edge: inset-area values had to be wrapped inside an inset-area() function.Opera: inset-area values had to be wrapped inside an inset-area() function.Opera Android: inset-area values had to be wrapped inside an inset-area() function.Samsung Internet: inset-area values had to be wrapped inside an inset-area() function.WebView Android: inset-area values had to be wrapped inside an inset-area() function.
css.properties.position-try-fallbacks.right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.self-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-all πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-bottom πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-left πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-right πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-block-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-block-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-inline-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-inline-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-self-x-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.span-self-x-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.span-self-y-end πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.span-self-y-start πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-try-fallbacks.span-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-x-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-x-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-y-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.span-y-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.top πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.x-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.x-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.y-end πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-try-fallbacks.y-start πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.position-visibility πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-visibility.always πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-visibility.anchors-valid πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-visibility.anchors-visible πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.position-visibility.no-overflow πŸ“‹Safari12/12/2025 Firefox1/13/202632
css.properties.right.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.right.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.top.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.top.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.properties.width.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.selectors.active-view-transition-type πŸ“‹Safari12/11/2024 Firefox1/13/2026398
css.types.anchor πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.types.anchor-size πŸ“‹Safari9/15/2025 Firefox1/13/2026120
css.types.length.rcap πŸ“‹Safari12/11/2023 Firefox1/13/2026764
css.types.length.rch πŸ“‹Safari12/11/2023 Firefox1/13/2026764
css.types.length.rex πŸ“‹Safari12/11/2023 Firefox1/13/2026764
css.types.length.ric πŸ“‹Safari12/11/2023 Firefox1/13/2026764
html.elements.button.commandfor.implicit_anchor_reference πŸ“‹Safari12/12/2025 Firefox1/13/202632
html.elements.button.popovertarget.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
html.elements.input.popovertarget.implicit_anchor_reference πŸ“‹Safari9/15/2025 Firefox1/13/2026120
javascript.statements.import.service_worker_support Safari9/20/2021 Firefox1/13/20261576

2025/12

API First Browser Date Last Browser Date Days Notes
api.Animation.overallProgress πŸ“‹Firefox8/19/2025 Safari12/12/2025115
api.CaretPosition πŸ“‹Firefox4/2/2013 Safari12/12/20254637
api.CaretPosition.getClientRect πŸ“‹Firefox8/6/2013 Safari12/12/20254511
api.CaretPosition.offset πŸ“‹Firefox4/2/2013 Safari12/12/20254637
api.CaretPosition.offsetNode πŸ“‹Firefox4/2/2013 Safari12/12/20254637
api.CommandEvent πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.CommandEvent.CommandEvent Firefox10/14/2025 Safari12/12/202559
api.CommandEvent.command πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.CommandEvent.source πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.Document.caretPositionFromPoint πŸ“‹Firefox4/2/2013 Safari12/12/20254637
api.Document.scrollend_event πŸ“‹Firefox1/17/2023 Safari12/12/20251060
api.Element.ariaColIndexText πŸ“‹Firefox10/24/2023 Safari12/12/2025780
api.Element.ariaRowIndexText πŸ“‹Firefox10/24/2023 Safari12/12/2025780
api.Element.beforematch_event πŸ“‹Firefox5/27/2025 Safari12/12/2025199
api.Element.scrollend_event πŸ“‹Firefox1/17/2023 Safari12/12/20251060
api.EventCounts πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.@@iterator Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.entries Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.forEach Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.get Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.has Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.keys Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.size Firefox6/1/2021 Safari12/12/20251655
api.EventCounts.values Firefox6/1/2021 Safari12/12/20251655
api.HTMLButtonElement.command πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.HTMLButtonElement.command.request-close πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.HTMLButtonElement.commandForElement πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.HTMLElement.command_event πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.LargestContentfulPaint πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.element πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.id πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.loadTime πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.paintTime πŸ“‹Firefox6/24/2025 Safari12/12/2025171
api.LargestContentfulPaint.presentationTime πŸ“‹Firefox6/24/2025 Safari12/12/2025171
Firefox: This property is exposed, but always returns null.Firefox for Android: This property is exposed, but always returns null.Safari: This property is exposed, but always returns null.Safari on iOS: This property is exposed, but always returns null.WebView on iOS: This property is exposed, but always returns null.
api.LargestContentfulPaint.renderTime πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.renderTime.cross-origin Firefox7/22/2025 Safari12/12/2025143
api.LargestContentfulPaint.size πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.toJSON πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.LargestContentfulPaint.url πŸ“‹Firefox1/23/2024 Safari12/12/2025689
api.Performance.eventCounts πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.Performance.interactionCount πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.PerformanceEventTiming πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.PerformanceEventTiming.cancelable πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.PerformanceEventTiming.interactionId πŸ“‹Firefox10/14/2025 Safari12/12/202559
api.PerformanceEventTiming.processingEnd πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.PerformanceEventTiming.processingStart πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.PerformanceEventTiming.target πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.PerformanceEventTiming.toJSON πŸ“‹Firefox6/1/2021 Safari12/12/20251655
api.Permissions.permission_storage-access πŸ“‹Firefox8/29/2023 Safari12/12/2025836
api.PointerEvent.pointerType.fractional_coordinates Firefox2/4/2025 Safari12/12/2025311
Chrome: movementX and movementY are not fractional, see bug 41364801.Chrome Android: movementX and movementY are not fractional, see bug 41364801.Edge: movementX and movementY are not fractional, see bug 41364801.Edge: Only clientX, clientY, pageX and pageY are fractional.Internet Explorer: Only clientX, clientY, pageX and pageY are fractional.Quest Browser: movementX and movementY are not fractional, see bug 41364801.Opera: movementX and movementY are not fractional, see bug 41364801.Opera Android: movementX and movementY are not fractional, see bug 41364801.Samsung Internet: movementX and movementY are not fractional, see bug 41364801.WebView Android: movementX and movementY are not fractional, see bug 41364801.
api.SVGAElement.hreflang πŸ“‹Firefox6/26/2018 Safari12/12/20252726
api.SVGAElement.type πŸ“‹Firefox6/26/2018 Safari12/12/20252726
api.SVGAnimationElement.beginEvent_event πŸ“‹Firefox10/5/2021 Safari12/12/20251529
Chrome: The onbegin event handler property is not supported.Chrome Android: The onbegin event handler property is not supported.Firefox: The onbegin event handler property is not supported.Firefox for Android: The onbegin event handler property is not supported.Opera: The onbegin event handler property is not supported.Opera Android: The onbegin event handler property is not supported.Safari: The onbegin event handler property is not supported.Safari on iOS: The onbegin event handler property is not supported.Samsung Internet: The onbegin event handler property is not supported.WebView Android: The onbegin event handler property is not supported.WebView on iOS: The onbegin event handler property is not supported.
api.SVGAnimationElement.repeatEvent_event πŸ“‹Firefox10/5/2021 Safari12/12/20251529
Chrome: The onrepeat event handler property is not supported.Chrome Android: The onrepeat event handler property is not supported.Firefox: The onrepeat event handler property is not supported.Firefox for Android: The onrepeat event handler property is not supported.Opera: The onrepeat event handler property is not supported.Opera Android: The onrepeat event handler property is not supported.Safari: The onrepeat event handler property is not supported.Safari on iOS: The onrepeat event handler property is not supported.Samsung Internet: The onrepeat event handler property is not supported.WebView Android: The onrepeat event handler property is not supported.WebView on iOS: The onrepeat event handler property is not supported.
api.SVGScriptElement.async Firefox8/29/2023 Safari12/12/2025836
css.properties.font-family.math Firefox11/11/2025 Safari12/12/202531
css.properties.math-shift πŸ“‹Firefox12/9/2025 Safari12/12/20253
css.properties.math-shift.compact πŸ“‹Firefox12/9/2025 Safari12/12/20253
css.properties.math-shift.normal πŸ“‹Firefox12/9/2025 Safari12/12/20253
css.properties.scrollbar-color πŸ“‹Firefox12/11/2018 Safari12/12/20252558
css.properties.scrollbar-color.auto πŸ“‹Firefox12/11/2018 Safari12/12/20252558
css.properties.text-decoration.auto πŸ“‹Firefox10/22/2019 Safari12/12/20252243
css.properties.text-decoration.currentColor πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.dashed πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.dotted πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.double πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.from-font πŸ“‹Firefox10/22/2019 Safari12/12/20252243
css.properties.text-decoration.grammar-error πŸ“‹Firefox4/1/2025 Safari12/12/2025255
css.properties.text-decoration.includes_color-and-style Firefox8/16/2011 Safari12/12/20255232
css.properties.text-decoration.includes_thickness Firefox10/22/2019 Safari12/12/20252243
css.properties.text-decoration.solid πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.spelling-error πŸ“‹Firefox4/1/2025 Safari12/12/2025255
css.properties.text-decoration.transparent πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration.wavy πŸ“‹Firefox11/15/2016 Safari12/12/20253314
css.properties.text-decoration-line.grammar-error πŸ“‹Firefox4/1/2025 Safari12/12/2025255
css.properties.text-decoration-line.spelling-error πŸ“‹Firefox4/1/2025 Safari12/12/2025255
css.selectors.nesting.at-scope Firefox8/19/2025 Safari12/12/2025115
css.types.color.color.colorSpace_parameter_accepts_display-p3-linear_value πŸ“‹Firefox12/9/2025 Safari12/12/20253
html.elements.button.command πŸ“‹Firefox10/14/2025 Safari12/12/202559
html.elements.button.command.request-close πŸ“‹Firefox10/14/2025 Safari12/12/202559
html.elements.button.commandfor πŸ“‹Firefox10/14/2025 Safari12/12/202559
html.elements.h1.no_ua_styles_in_article_aside_nav_section πŸ“‹Firefox6/24/2025 Safari12/12/2025171
http.headers.Content-Security-Policy.style-src-elem πŸ“‹Firefox12/13/2022 Safari12/12/20251095
Safari: The style-src-elem directive was parsed, but had no effect. See bug 276931.Safari on iOS: The style-src-elem directive was parsed, but had no effect. See bug 276931.WebView on iOS: The style-src-elem directive was parsed, but had no effect. See bug 276931.
http.headers.Set-Cookie.Partitioned πŸ“‹Firefox7/22/2025 Safari12/12/2025143
javascript.builtins.Map.getOrInsert πŸ“‹Firefox10/14/2025 Safari12/12/202559
javascript.builtins.Map.getOrInsertComputed πŸ“‹Firefox10/14/2025 Safari12/12/202559
javascript.builtins.Math.sumPrecise πŸ“‹Firefox4/1/2025 Safari12/12/2025255
javascript.builtins.WeakMap.getOrInsert πŸ“‹Firefox10/14/2025 Safari12/12/202559
javascript.builtins.WeakMap.getOrInsertComputed πŸ“‹Firefox10/14/2025 Safari12/12/202559
webassembly.api.Memory.toFixedLengthBuffer πŸ“‹Firefox11/11/2025 Safari12/12/202531
webassembly.api.Memory.toResizableBuffer πŸ“‹Firefox11/11/2025 Safari12/12/202531
webassembly.jsStringBuiltins πŸ“‹Firefox1/7/2025 Safari12/12/2025339
api.CSSScopeRule πŸ“‹Safari3/5/2024 Firefox12/9/2025644
api.CSSScopeRule.end πŸ“‹Safari3/5/2024 Firefox12/9/2025644
api.CSSScopeRule.start πŸ“‹Safari3/5/2024 Firefox12/9/2025644
css.at-rules.scope πŸ“‹Safari3/5/2024 Firefox12/9/2025644
css.properties.height.stretch πŸ“‹Safari9/30/2015 Firefox12/9/20253723
css.properties.width.stretch πŸ“‹Safari10/22/2013 Firefox12/9/20254431
css.types.color.contrast-color πŸ“‹Safari9/15/2025 Firefox12/9/202585
javascript.builtins.FinalizationRegistry.register.symbol_as_target Safari3/27/2023 Firefox12/9/2025988
javascript.builtins.WeakMap.symbol_as_keys Safari3/27/2023 Firefox12/9/2025988
javascript.builtins.WeakRef.WeakRef.symbol_as_target Safari3/27/2023 Firefox12/9/2025988
javascript.builtins.WeakSet.symbol_as_keys Safari3/27/2023 Firefox12/9/2025988

2025/11

API First Browser Date Last Browser Date Days Notes
api.CSSStyleRule.style.returns_CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.HTMLElement.style.returns_CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.MathMLElement.style.returns_CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_contributingSources_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_payloadType_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_rtpTimestamp_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_sequenceNumber_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_synchronizationSource_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.getMetadata.return_object_property_contributingSources πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.getMetadata.return_object_property_payloadType πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.getMetadata.return_object_property_rtpTimestamp πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.getMetadata.return_object_property_sequenceNumber πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedAudioFrame.getMetadata.return_object_property_synchronizationSource πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_contributingSources_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_dependencies_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_frameId_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_height_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_payloadType_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_spatialIndex_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_synchronizationSource_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_temporalIndex_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_width_parameter πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_contributingSources πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_dependencies πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_frameId πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_height πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_payloadType πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_spatialIndex πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_synchronizationSource πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_temporalIndex πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.RTCEncodedVideoFrame.getMetadata.return_object_property_width πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.SVGElement.style.returns_CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox11/11/202557
api.Window.getComputedStyle.returns_CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox11/11/202557
css.properties.text-autospace πŸ“‹Safari3/31/2025 Firefox11/11/2025225
css.properties.text-autospace.auto πŸ“‹Safari3/31/2025 Firefox11/11/2025225
css.properties.text-autospace.ideograph-alpha πŸ“‹Safari3/31/2025 Firefox11/11/2025225
css.properties.text-autospace.ideograph-numeric πŸ“‹Safari3/31/2025 Firefox11/11/2025225
css.properties.text-autospace.no-autospace πŸ“‹Safari3/31/2025 Firefox11/11/2025225
css.properties.text-autospace.normal πŸ“‹Safari3/31/2025 Firefox11/11/2025225
javascript.builtins.Atomics.waitAsync πŸ“‹Safari3/27/2023 Firefox11/11/2025960
Chrome: The Atomics.waitAsync() method never times out. See bug 40742782.Chrome Android: The Atomics.waitAsync() method never times out. See bug 40742782.Edge: The Atomics.waitAsync() method never times out. See bug 40742782.Quest Browser: The Atomics.waitAsync() method never times out. See bug 40742782.Opera Android: The Atomics.waitAsync() method never times out. See bug 40742782.WebView Android: The Atomics.waitAsync() method never times out. See bug 40742782.

2025/10

API First Browser Date Last Browser Date Days Notes
api.CSSStyleProperties πŸ“‹Safari9/15/2025 Firefox10/14/202529
api.CSSStyleProperties.cssFloat πŸ“‹Safari9/15/2025 Firefox10/14/202529
api.Document.startViewTransition πŸ“‹Safari9/16/2024 Firefox10/14/2025393
api.GPUDevice.importExternalTexture πŸ“‹Safari9/15/2025 Firefox10/14/202529
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supported on Windows only, in all contexts except for service workers.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.importExternalTexture.videoframe_source Safari9/15/2025 Firefox10/14/202529
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.HTMLElement.showPopover.options_source_parameter πŸ“‹Safari9/15/2025 Firefox10/14/202529
Chrome: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Chrome Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Edge: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Firefox: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 1984004.Firefox for Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 1984004.Opera: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Opera Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Safari: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.Safari on iOS: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.Samsung Internet: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.WebView Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.WebView on iOS: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.
api.HTMLElement.togglePopover.options_source_parameter πŸ“‹Safari9/15/2025 Firefox10/14/202529
Chrome: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Chrome Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Edge: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Firefox: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 1984004.Firefox for Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 1984004.Opera: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Opera Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.Safari: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.Safari on iOS: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.Samsung Internet: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.WebView Android: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 383343310.WebView on iOS: When using this option, the focus order doesn't change, so the popover does not become the next focus element. See bug 286575.
api.RTCDataChannel.closing_event πŸ“‹Safari3/14/2022 Firefox10/14/20251310
api.RTCDataChannel.transferable πŸ“‹Safari9/20/2021 Firefox10/14/20251485
api.ViewTransition πŸ“‹Safari9/16/2024 Firefox10/14/2025393
api.ViewTransition.finished πŸ“‹Safari9/16/2024 Firefox10/14/2025393
api.ViewTransition.ready πŸ“‹Safari9/16/2024 Firefox10/14/2025393
api.ViewTransition.skipTransition πŸ“‹Safari9/16/2024 Firefox10/14/2025393
api.ViewTransition.updateCallbackDone πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.properties.view-transition-class πŸ“‹Safari12/11/2024 Firefox10/14/2025307
css.properties.view-transition-class.none πŸ“‹Safari12/11/2024 Firefox10/14/2025307
css.properties.view-transition-name πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.properties.view-transition-name.match-element πŸ“‹Safari3/31/2025 Firefox10/14/2025197
css.properties.view-transition-name.none πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.active-view-transition πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.view-transition πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.view-transition-group πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.view-transition-image-pair πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.view-transition-new πŸ“‹Safari9/16/2024 Firefox10/14/2025393
css.selectors.view-transition-old πŸ“‹Safari9/16/2024 Firefox10/14/2025393
html.elements.iframe.cross-origin-top-navigation-by-user-activation Safari9/19/2019 Firefox10/14/20252217
Chrome: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Chrome Android: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Edge: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Firefox: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Firefox for Android: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Quest Browser: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Opera: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Opera Android: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.Safari: If a top-navigation is blocked, no redirect occurs, and an error is reported in the developer console.Safari on iOS: If a top-navigation is blocked, no redirect occurs, and an error is reported in the developer console.Samsung Internet: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.WebView Android: If a top-navigation is blocked, users are prompted for permission to redirect, and an error is reported in the developer console.WebView on iOS: If a top-navigation is blocked, no redirect occurs, and an error is reported in the developer console.

2025/9

API First Browser Date Last Browser Date Days Notes
api.SpeechRecognition.abort πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.audioend_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.audiostart_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.continuous πŸ“‹Safari4/26/2021 Firefox9/16/20251604
Chrome Android: The property can be set, but has no effect.Quest Browser: The property can be set, but has no effect.Opera Android: The property can be set, but has no effect.Samsung Internet: The property can be set, but has no effect.WebView Android: The property can be set, but has no effect.
api.SpeechRecognition.end_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.error_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.interimResults πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.lang πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.maxAlternatives πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.nomatch_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.result_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.soundend_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.soundstart_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.speechend_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.speechstart_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.start πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.start_event πŸ“‹Safari4/26/2021 Firefox9/16/20251604
api.SpeechRecognition.stop πŸ“‹Safari4/26/2021 Firefox9/16/20251604
css.selectors.details-content πŸ“‹Safari3/31/2025 Firefox9/16/2025169
Safari: Does not support chaining pseudo-elements after ::details-content. See bug 283446.Safari on iOS: Does not support chaining pseudo-elements after ::details-content. See bug 283446.WebView on iOS: Does not support chaining pseudo-elements after ::details-content. See bug 283446.
html.elements.input.type_color.accepts_css_colors πŸ“‹Safari3/31/2025 Firefox9/16/2025169
api.AudioData πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.AudioData πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.allocationSize πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.clone πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.close πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.copyTo πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.duration πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.format πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.numberOfChannels πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.numberOfFrames πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.sampleRate πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioData.timestamp πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.AudioDecoder πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.close πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.configure πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.decode πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.decodeQueueSize πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.dequeue_event πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.flush πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.isConfigSupported_static πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.reset πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioDecoder.state πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.AudioEncoder πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.close πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.configure πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.configure.bitrateMode πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.configure.opus πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.dequeue_event πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.encode πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.encodeQueueSize πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.flush πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.isConfigSupported_static πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.reset πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.AudioEncoder.state πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.CSSPageDescriptors πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.margin πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.margin-bottom πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.margin-left πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.margin-right πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.margin-top πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.marginBottom πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.marginLeft πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.marginRight πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.marginTop πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageDescriptors.size πŸ“‹Firefox8/6/2024 Safari9/15/2025405
api.CSSPageRule.style.type_CSSPageDescriptors Firefox8/6/2024 Safari9/15/2025405
api.Document.parseHTMLUnsafe_static πŸ“‹Firefox7/9/2024 Safari9/15/2025433
Firefox: Throws error NS_ERROR_UNEXPECTED (bug 1887817.)Firefox for Android: Throws error NS_ERROR_UNEXPECTED (bug 1887817.)Safari: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).Safari on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).WebView on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).
api.Element.getHTML.escapes_lt_gt_in_attributes Firefox6/24/2025 Safari9/15/202583
api.Element.innerHTML.escapes_lt_gt_in_attributes Firefox6/24/2025 Safari9/15/202583
api.Element.outerHTML.escapes_lt_gt_in_attributes Firefox6/24/2025 Safari9/15/202583
api.Element.setHTMLUnsafe πŸ“‹Firefox2/20/2024 Safari9/15/2025573
Safari: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).Safari on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).WebView on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).
api.EncodedAudioChunk πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.EncodedAudioChunk πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.byteLength πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.copyTo πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.duration πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.timestamp πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.EncodedAudioChunk.type πŸ“‹Firefox9/3/2024 Safari9/15/2025377
api.FileSystemFileHandle.createWritable πŸ“‹Firefox3/14/2023 Safari9/15/2025916
api.FileSystemWritableFileStream πŸ“‹Firefox3/14/2023 Safari9/15/2025916
api.FileSystemWritableFileStream.seek πŸ“‹Firefox3/14/2023 Safari9/15/2025916
api.FileSystemWritableFileStream.truncate πŸ“‹Firefox3/14/2023 Safari9/15/2025916
api.FileSystemWritableFileStream.write πŸ“‹Firefox3/14/2023 Safari9/15/2025916
api.GPU πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPU.getPreferredCanvasFormat πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPU.requestAdapter πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPU.wgslLanguageFeatures πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapter πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapter.features πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapter.info πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome Android: Supported on ChromeOS, macOS, and Windows.Chrome Android: Supported on Linux (Intel Gen12+ GPUs only) since Chrome Android 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera Android: Supported on ChromeOS, macOS, and Windows.Opera Android: Supported on Linux (Intel Gen12+ GPUs only) since Opera Android 95.Samsung Internet: Supported on ChromeOS, macOS, and Windows.Samsung Internet: Supported on Linux (Intel Gen12+ GPUs only) since Samsung Internet false.WebView Android: Supported on ChromeOS, macOS, and Windows.WebView Android: Supported on Linux (Intel Gen12+ GPUs only) since WebView Android 144.
api.GPUAdapter.limits πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapter.requestDevice πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapterInfo πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapterInfo.architecture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapterInfo.description πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapterInfo.device πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUAdapterInfo.isFallbackAdapter πŸ“‹Firefox7/22/2025 Safari9/15/202555
Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.
api.GPUAdapterInfo.vendor πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBindGroup.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBindGroupLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBindGroupLayout.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.destroy πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.getMappedRange πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.mapAsync πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.mapState πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.size πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.unmap πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUBuffer.usage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCanvasContext πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCanvasContext.canvas πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCanvasContext.configure πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome: The rgba8unorm format is currently not supported on macOS. See bug 40823053.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Edge: The rgba8unorm format is currently not supported on macOS. See bug 40823053.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera: The rgba8unorm format is currently not supported on macOS. See bug 40823053.
api.GPUCanvasContext.getConfiguration πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome Android: Supported on ChromeOS, macOS, and Windows.Chrome Android: Supported on Linux (Intel Gen12+ GPUs only) since Chrome Android 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera Android: Supported on ChromeOS, macOS, and Windows.Opera Android: Supported on Linux (Intel Gen12+ GPUs only) since Opera Android 95.Samsung Internet: Supported on ChromeOS, macOS, and Windows.Samsung Internet: Supported on Linux (Intel Gen12+ GPUs only) since Samsung Internet false.WebView Android: Supported on ChromeOS, macOS, and Windows.WebView Android: Supported on Linux (Intel Gen12+ GPUs only) since WebView Android 144.
api.GPUCanvasContext.getCurrentTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCanvasContext.unconfigure πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandBuffer.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.beginComputePass πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.beginRenderPass πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.clearBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.copyBufferToBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.copyBufferToTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.copyTextureToBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.copyTextureToTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.finish πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.insertDebugMarker πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.popDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.pushDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCommandEncoder.resolveQuerySet πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationInfo πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationInfo.messages πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.length πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.lineNum πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.linePos πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.message πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.offset πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUCompilationMessage.type πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.dispatchWorkgroups πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.dispatchWorkgroupsIndirect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.end πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.insertDebugMarker πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.popDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.pushDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.setBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePassEncoder.setPipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePipeline.getBindGroupLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUComputePipeline.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createBindGroupLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome: Before version 138, this method does not throw a RangeError exception when mappedAtCreation is true but size is not a multiple of 4; it generates a validation error instead.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Edge: Before version 138, this method does not throw a RangeError exception when mappedAtCreation is true but size is not a multiple of 4; it generates a validation error instead.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera: Before version 122, this method does not throw a RangeError exception when mappedAtCreation is true but size is not a multiple of 4; it generates a validation error instead.
api.GPUDevice.createCommandEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createComputePipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createComputePipelineAsync πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createPipelineLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createQuerySet πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createRenderBundleEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createRenderPipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createRenderPipelineAsync πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createSampler πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createShaderModule πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.createTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.destroy πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.features πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.limits πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.lost πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.popErrorScope πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.pushErrorScope πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDevice.queue πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDeviceLostInfo πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDeviceLostInfo.message πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUDeviceLostInfo.reason πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUExternalTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUExternalTexture.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUInternalError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUInternalError.GPUInternalError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUOutOfMemoryError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUOutOfMemoryError.GPUOutOfMemoryError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineError.GPUPipelineError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineError.GPUPipelineError.message_optional Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supported on Windows only, in all contexts except for service workers.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineError.reason πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUPipelineLayout.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQuerySet πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQuerySet.count πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQuerySet.destroy πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQuerySet.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQuerySet.type πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.copyExternalImageToTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.onSubmittedWorkDone πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.submit πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.writeBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUQueue.writeTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundle πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundle.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.draw πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.drawIndexed πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.drawIndexedIndirect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.drawIndirect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.finish πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.insertDebugMarker πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.popDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.pushDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.setBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.setIndexBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.setPipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderBundleEncoder.setVertexBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.beginOcclusionQuery πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.draw πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.drawIndexed πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.drawIndexedIndirect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.drawIndirect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.end πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.endOcclusionQuery πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.executeBundles πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.insertDebugMarker πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.popDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.pushDebugGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setBlendConstant πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setIndexBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setPipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setScissorRect πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setStencilReference πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setVertexBuffer πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPassEncoder.setViewport πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPipeline πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPipeline.getBindGroupLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPURenderPipeline.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSampler πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSampler.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUShaderModule πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUShaderModule.getCompilationInfo πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUShaderModule.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.@@iterator πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.entries πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.feature_texture-compression-astc-sliced-3d πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome Android: Supported on ChromeOS, macOS, and Windows.Chrome Android: Supported on Linux (Intel Gen12+ GPUs only) since Chrome Android 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera Android: Supported on ChromeOS, macOS, and Windows.Opera Android: Supported on Linux (Intel Gen12+ GPUs only) since Opera Android 95.WebView Android: Supported on ChromeOS, macOS, and Windows.WebView Android: Supported on Linux (Intel Gen12+ GPUs only) since WebView Android 144.
api.GPUSupportedFeatures.feature_texture-compression-bc-sliced-3d πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome Android: Supported on ChromeOS, macOS, and Windows.Chrome Android: Supported on Linux (Intel Gen12+ GPUs only) since Chrome Android 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.Opera Android: Supported on ChromeOS, macOS, and Windows.Opera Android: Supported on Linux (Intel Gen12+ GPUs only) since Opera Android 95.WebView Android: Supported on ChromeOS, macOS, and Windows.WebView Android: Supported on Linux (Intel Gen12+ GPUs only) since WebView Android 144.
api.GPUSupportedFeatures.forEach πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.has πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.keys πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.size πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedFeatures.values πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxBindGroups πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxBindGroupsPlusVertexBuffers πŸ“‹Firefox7/22/2025 Safari9/15/202555
Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.
api.GPUSupportedLimits.maxBindingsPerBindGroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxBufferSize πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxColorAttachmentBytesPerSample πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxColorAttachments πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeInvocationsPerWorkgroup πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeWorkgroupSizeX πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeWorkgroupSizeY πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeWorkgroupSizeZ πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeWorkgroupStorageSize πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxComputeWorkgroupsPerDimension πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxDynamicStorageBuffersPerPipelineLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxDynamicUniformBuffersPerPipelineLayout πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxInterStageShaderVariables πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxSampledTexturesPerShaderStage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxSamplersPerShaderStage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxStorageBufferBindingSize πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxStorageBuffersPerShaderStage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxStorageTexturesPerShaderStage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxTextureArrayLayers πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxTextureDimension1D πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxTextureDimension2D πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxTextureDimension3D πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxUniformBufferBindingSize πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxUniformBuffersPerShaderStage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxVertexAttributes πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxVertexBufferArrayStride πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.maxVertexBuffers πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.minStorageBufferOffsetAlignment πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUSupportedLimits.minUniformBufferOffsetAlignment πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.createView πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.depthOrArrayLayers πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.destroy πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.dimension πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.format πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.height πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.mipLevelCount πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.sampleCount πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.usage πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTexture.width πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTextureView πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUTextureView.label πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUUncapturedErrorEvent πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUUncapturedErrorEvent.GPUUncapturedErrorEvent πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUUncapturedErrorEvent.error πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUValidationError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.GPUValidationError.GPUValidationError πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.HTMLCanvasElement.getContext.webgpu_context πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supported on Windows only, in all contexts except for service workers.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.HTMLElement.beforetoggle_event.dialog_elements πŸ“‹Firefox11/26/2024 Safari9/15/2025293
api.HTMLElement.toggle_event.dialog_elements πŸ“‹Firefox11/26/2024 Safari9/15/2025293
api.IntersectionObserver.scrollMargin Firefox7/22/2025 Safari9/15/202555
api.Navigator.gpu πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supported on Windows only.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.OffscreenCanvas.getContext.webgpu_context πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supported on Windows only, in all contexts except for service workers.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.ShadowRoot.getHTML.escapes_lt_gt_in_attributes Firefox6/24/2025 Safari9/15/202583
api.ShadowRoot.innerHTML.escapes_lt_gt_in_attributes Firefox6/24/2025 Safari9/15/202583
api.ShadowRoot.setHTMLUnsafe πŸ“‹Firefox2/20/2024 Safari9/15/2025573
Safari: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).Safari on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).WebView on iOS: If there are custom elements in a declarative shadow root in the parsed HTML, then the elements' constructors and connectedCallback() methods are not called (bug 296420).
api.URLPattern πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.URLPattern πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.URLPattern.ignoreCase_option πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.exec πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.hasRegExpGroups πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.hash πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.hostname πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.password πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.pathname πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.port πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.protocol πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.search πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.test πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.URLPattern.username πŸ“‹Firefox8/19/2025 Safari9/15/202527
api.WGSLLanguageFeatures πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.@@iterator πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.entries πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.forEach πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.has πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.keys πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.size πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WGSLLanguageFeatures.values πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
api.WorkerNavigator.gpu πŸ“‹Firefox7/22/2025 Safari9/15/202555
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Firefox: Supports all contexts except service workers. See bug 1942431.Firefox: Supports Windows since Firefox 141. See bug 1972486.Firefox: Supports macOS Tahoe on Apple silicon since Firefox 145. See bug 1992212.Firefox: Supports older macOS versions on Apple silicon since Firefox 147. See bug 1993341.Firefox: Does not support macOS on Intel CPUs. See bug 2004105.Firefox: Does not support Linux. See bug 2006676.Firefox for Android: Supports all contexts except service workers. See bug 1942431.Firefox for Android: Supports Windows since Firefox for Android 141. See bug 1972486.Firefox for Android: Supports macOS Tahoe on Apple silicon since Firefox for Android 145. See bug 1992212.Firefox for Android: Supports older macOS versions on Apple silicon since Firefox for Android 147. See bug 1993341.Firefox for Android: Does not support macOS on Intel CPUs. See bug 2004105.Firefox for Android: Does not support Linux. See bug 2006676.Opera: Supported on ChromeOS, macOS, and Windows.Opera: Supported on Linux (Intel Gen12+ GPUs only) since Opera false.
css.properties.animation-timeline πŸ“‹Firefox2/14/2023 Safari9/15/2025944
css.properties.animation-timeline.scroll πŸ“‹Firefox2/14/2023 Safari9/15/2025944
Firefox: Zero scroll range is treated as 100% but should be 0% (see bug 1780865).Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values.
css.properties.animation-timeline.view πŸ“‹Firefox6/6/2023 Safari9/15/2025832
css.properties.content-visibility.auto πŸ“‹Firefox4/16/2024 Safari9/15/2025517
Safari: Skipped content is not findable via find-in-page.Safari on iOS: Skipped content is not findable via find-in-page.WebView on iOS: Skipped content is not findable via find-in-page.
css.properties.overflow-block πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-block.auto πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-block.clip πŸ“‹Firefox9/22/2020 Safari9/15/20251819
css.properties.overflow-block.hidden πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-block.scroll πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-block.visible πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-inline πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-inline.auto πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-inline.clip πŸ“‹Firefox9/22/2020 Safari9/15/20251819
css.properties.overflow-inline.hidden πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-inline.scroll πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.overflow-inline.visible πŸ“‹Firefox9/3/2019 Safari9/15/20252204
css.properties.scroll-timeline πŸ“‹Firefox3/14/2023 Safari9/15/2025916
Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical axis values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline.
css.properties.scroll-timeline-axis πŸ“‹Firefox3/14/2023 Safari9/15/2025916
Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: Supports the deprecated horizontal and vertical values, and not the x and y values.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline.
css.properties.scroll-timeline-name πŸ“‹Firefox3/14/2023 Safari9/15/2025916
Firefox: The syntax of the shorthand property uses the fixed order of name and then the axis.Firefox: The @scroll-timeline at-rule is replaced with the longhand properties scroll-timeline-name and scroll-timeline-axis and the shorthand property scroll-timeline.
css.properties.view-timeline πŸ“‹Firefox6/6/2023 Safari9/15/2025832
Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values.
css.properties.view-timeline-axis πŸ“‹Firefox6/6/2023 Safari9/15/2025832
Firefox: Now supports the x and y values, and also the deprecated horizontal and vertical values.
css.properties.view-timeline-name πŸ“‹Firefox3/14/2023 Safari9/15/2025916
javascript.builtins.Intl.Locale.variants πŸ“‹Firefox7/22/2025 Safari9/15/202555
javascript.regular_expressions.modifier πŸ“‹Firefox10/29/2024 Safari9/15/2025321

2025/8

API First Browser Date Last Browser Date Days Notes
api.RTCStatsReport.type_candidate-pair.responsesReceived πŸ“‹Safari9/19/2017 Firefox8/19/20252891
api.RTCStatsReport.type_candidate-pair.totalRoundTripTime πŸ“‹Safari9/19/2017 Firefox8/19/20252891
api.Selection.getComposedRanges πŸ“‹Safari9/18/2023 Firefox8/19/2025701
api.SpeechRecognition πŸ“‹Safari4/26/2021 Firefox8/19/20251576
Chrome: You'll need to serve your code through a web server for recognition to work.Chrome Android: You'll need to serve your code through a web server for recognition to work.Edge: You'll need to serve your code through a web server for recognition to work.Quest Browser: You'll need to serve your code through a web server for recognition to work.Opera: You'll need to serve your code through a web server for recognition to work.Opera Android: You'll need to serve your code through a web server for recognition to work.Samsung Internet: You'll need to serve your code through a web server for recognition to work.WebView Android: You'll need to serve your code through a web server for recognition to work.
api.SpeechRecognition.SpeechRecognition πŸ“‹Safari4/26/2021 Firefox8/19/20251576

2025/7

API First Browser Date Last Browser Date Days Notes
api.MediaDevices.getSupportedConstraints.return_object_property_groupId πŸ“‹Firefox10/22/2019 Safari7/29/20252107
api.HTMLElement.togglePopover.force_parameter πŸ“‹Safari9/18/2023 Firefox7/22/2025673
api.HTMLElement.togglePopover.options_force_parameter πŸ“‹Safari3/31/2025 Firefox7/22/2025113
css.properties.font-variant-emoji πŸ“‹Safari5/13/2024 Firefox7/22/2025435

2025/6

API First Browser Date Last Browser Date Days Notes
api.CSS.highlights_static πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.CookieChangeEvent πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieChangeEvent.CookieChangeEvent πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieChangeEvent.changed πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieChangeEvent.deleted πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.change_event πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.delete πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.get πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.get.name_return_property πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.get.value_return_property πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.getAll πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.CookieStore.set πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.ExtendableCookieChangeEvent πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.ExtendableCookieChangeEvent.ExtendableCookieChangeEvent πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.ExtendableCookieChangeEvent.changed πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.ExtendableCookieChangeEvent.deleted πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.Highlight πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.Highlight.@@iterator Safari12/11/2023 Firefox6/24/2025561
api.Highlight.Highlight πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.Highlight.add Safari12/11/2023 Firefox6/24/2025561
api.Highlight.clear Safari12/11/2023 Firefox6/24/2025561
api.Highlight.delete Safari12/11/2023 Firefox6/24/2025561
api.Highlight.entries Safari12/11/2023 Firefox6/24/2025561
api.Highlight.forEach Safari12/11/2023 Firefox6/24/2025561
api.Highlight.has Safari12/11/2023 Firefox6/24/2025561
api.Highlight.keys Safari12/11/2023 Firefox6/24/2025561
api.Highlight.priority πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.Highlight.size Safari12/11/2023 Firefox6/24/2025561
api.Highlight.type πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.Highlight.values Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry πŸ“‹Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.@@iterator Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.clear Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.delete Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.entries Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.forEach Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.get Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.has Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.keys Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.set Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.size Safari12/11/2023 Firefox6/24/2025561
api.HighlightRegistry.values Safari12/11/2023 Firefox6/24/2025561
api.ServiceWorkerGlobalScope.cookieStore πŸ“‹Safari3/31/2025 Firefox6/24/202585
api.Window.cookieStore πŸ“‹Safari3/31/2025 Firefox6/24/202585
css.selectors.highlight πŸ“‹Safari12/11/2023 Firefox6/24/2025561
Firefox: Cannot yet be used with text-shadow. See bug 1845447.Firefox: Before Firefox 146, cannot be used with text-decoration. See bug 1845446.Firefox for Android: Cannot yet be used with text-shadow. See bug 1845447.Firefox for Android: Before Firefox for Android 146, cannot be used with text-decoration. See bug 1845446.Safari: The style is ignored when combined with user-select: none. See bug 278455.Safari on iOS: The style is ignored when combined with user-select: none. See bug 278455.WebView on iOS: The style is ignored when combined with user-select: none. See bug 278455.

2025/5

API First Browser Date Last Browser Date Days Notes
api.CredentialsContainer.create.publicKey_option.extensions.largeBlob πŸ“‹Safari9/18/2023 Firefox5/27/2025617
api.CredentialsContainer.create.publicKey_option.extensions.prf πŸ“‹Safari9/16/2024 Firefox5/27/2025253
Firefox: Not supported on macOS.
api.HTMLDialogElement.requestClose πŸ“‹Safari3/31/2025 Firefox5/27/202557

2025/4

API First Browser Date Last Browser Date Days Notes
api.RTCCertificate.getFingerprints πŸ“‹Safari3/25/2019 Firefox4/29/20252227
api.RTCRtpSender.getParameters.return_object_property_degradationPreference πŸ“‹Safari3/25/2019 Firefox4/29/20252227
api.RTCRtpSender.setParameters.parameters_degradationPreference_parameter πŸ“‹Safari3/25/2019 Firefox4/29/20252227
html.elements.script.type.importmap.integrity πŸ“‹Safari9/16/2024 Firefox4/29/2025225
http.headers.Clear-Site-Data.cache πŸ“‹Safari9/18/2023 Firefox4/29/2025589
Chrome: Setting this value may increase response duration (see bug 40233601.Chrome: Setting this value may prevent a page from fully load (see bug 41343050.Chrome Android: Setting this value may increase response duration (see bug 40233601.Chrome Android: Setting this value may prevent a page from fully load (see bug 41343050.Edge: Setting this value may increase response duration (see bug 40233601.Quest Browser: Setting this value may increase response duration (see bug 40233601.Opera: Setting this value may increase response duration (see bug 40233601.Opera: Setting this value may prevent a page from fully load (see bug 41343050.Opera Android: Setting this value may increase response duration (see bug 40233601.Opera Android: Setting this value may prevent a page from fully load (see bug 41343050.Samsung Internet: Setting this value may increase response duration (see bug 40233601.WebView Android: Setting this value may increase response duration (see bug 40233601.WebView Android: Setting this value may prevent a page from fully load (see bug 41343050.
javascript.builtins.Error.captureStackTrace πŸ“‹Safari12/11/2023 Firefox4/29/2025505
javascript.builtins.Error.isError πŸ“‹Safari3/31/2025 Firefox4/29/202529
Node.js: Returns false for DOMException instances. See issue 56497.Safari: Returns false for DOMException instances.Safari on iOS: Returns false for DOMException instances.WebView on iOS: Returns false for DOMException instances.
javascript.grammar.trailing_commas.trailing_commas_in_dynamic_import πŸ“‹Safari9/20/2021 Firefox4/29/20251317
Node.js: The second parameter no longer throws a parser error, but the --experimental-json-modules flag is still needed to load JSON modules.
javascript.operators.import.options_parameter πŸ“‹Safari9/20/2021 Firefox4/29/20251317
Node.js: The second parameter no longer throws a parser error, but the --experimental-json-modules flag is still needed to load JSON modules.
javascript.statements.import.import_attributes πŸ“‹Safari12/11/2023 Firefox4/29/2025505
javascript.statements.import.import_attributes.type_json Safari12/11/2023 Firefox4/29/2025505
api.PushSubscriptionChangeEvent πŸ“‹Safari9/12/2022 Firefox4/1/2025932
Firefox: Before Firefox 137, The pushsubscriptionchange event is fired, but does not have the oldSubscription and newSubscription properties. See bug 1635524.Firefox for Android: Before Firefox for Android 137, The pushsubscriptionchange event is fired, but does not have the oldSubscription and newSubscription properties. See bug 1635524.Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscriptionChangeEvent.PushSubscriptionChangeEvent πŸ“‹Safari10/24/2022 Firefox4/1/2025890
Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscriptionChangeEvent.newSubscription πŸ“‹Safari9/12/2022 Firefox4/1/2025932
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscriptionChangeEvent.oldSubscription πŸ“‹Safari9/12/2022 Firefox4/1/2025932
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
javascript.builtins.Atomics.pause πŸ“‹Safari3/31/2025 Firefox4/1/20251

2025/3

API First Browser Date Last Browser Date Days Notes
api.AudioContext.outputLatency πŸ“‹Firefox10/22/2019 Safari3/31/20251987
api.CSPViolationReportBody πŸ“‹Firefox9/3/2024 Safari3/31/2025209
api.CanvasRenderingContext2D.font πŸ“‹Firefox6/30/2009 Safari3/31/20255753
Safari: The font-weight can be set, but is not reflected back (see bug 284115).Safari on iOS: The font-weight can be set, but is not reflected back (see bug 284115).WebView on iOS: The font-weight can be set, but is not reflected back (see bug 284115).
api.CanvasRenderingContext2D.letterSpacing πŸ“‹Firefox7/4/2023 Safari3/31/2025636
api.CanvasRenderingContext2D.wordSpacing πŸ“‹Firefox7/4/2023 Safari3/31/2025636
api.ClipboardItem.supports_static πŸ“‹Firefox6/11/2024 Safari3/31/2025293
api.Document.fragmentDirective πŸ“‹Firefox10/1/2024 Safari3/31/2025181
api.FragmentDirective πŸ“‹Firefox10/1/2024 Safari3/31/2025181
api.HTMLElement.focus.options_focusVisible_parameter Firefox8/23/2022 Safari3/31/2025951
api.HTMLMediaElement.setSinkId πŸ“‹Firefox8/1/2023 Safari3/31/2025608
Chrome Android: Not available due to a limitation in Android, see bug 41276355.Firefox for Android: Not available due to a limitation in Android, see bug 1473346.Quest Browser: Not available due to a limitation in Android, see bug 41276355.Opera Android: Not available due to a limitation in Android, see bug 41276355.Samsung Internet: Not available due to a limitation in Android, see bug 41276355.WebView Android: Not available due to a limitation in Android, see bug 41276355.
api.HTMLMediaElement.sinkId πŸ“‹Firefox8/1/2023 Safari3/31/2025608
Chrome Android: Not available due to a limitation in Android, see bug 41276355.Firefox for Android: Not available due to a limitation in Android, see bug 1473346.Quest Browser: Not available due to a limitation in Android, see bug 41276355.Opera Android: Not available due to a limitation in Android, see bug 41276355.Samsung Internet: Not available due to a limitation in Android, see bug 41276355.WebView Android: Not available due to a limitation in Android, see bug 41276355.
api.ImageCapture πŸ“‹Firefox1/13/2015 Safari3/31/20253730
api.ImageCapture.ImageCapture πŸ“‹Firefox1/13/2015 Safari3/31/20253730
api.ImageCapture.takePhoto πŸ“‹Firefox1/13/2015 Safari3/31/20253730
Chrome: photoSettings parameter not supported.Chrome Android: photoSettings parameter not supported.Opera: photoSettings parameter not supported.Opera Android: photoSettings parameter not supported.Samsung Internet: photoSettings parameter not supported.WebView Android: photoSettings parameter not supported.
api.ImageCapture.track πŸ“‹Firefox1/13/2015 Safari3/31/20253730
api.OffscreenCanvasRenderingContext2D.font πŸ“‹Firefox9/20/2022 Safari3/31/2025923
Safari: The font-weight can be set, but is not reflected back (see bug 284115).Safari on iOS: The font-weight can be set, but is not reflected back (see bug 284115).WebView on iOS: The font-weight can be set, but is not reflected back (see bug 284115).
api.OffscreenCanvasRenderingContext2D.letterSpacing πŸ“‹Firefox7/4/2023 Safari3/31/2025636
api.OffscreenCanvasRenderingContext2D.wordSpacing πŸ“‹Firefox7/4/2023 Safari3/31/2025636
api.PublicKeyCredential.parseCreationOptionsFromJSON_static πŸ“‹Firefox10/24/2023 Safari3/31/2025524
api.PublicKeyCredential.parseRequestOptionsFromJSON_static πŸ“‹Firefox10/24/2023 Safari3/31/2025524
api.PublicKeyCredential.toJSON πŸ“‹Firefox10/24/2023 Safari3/31/2025524
api.SVGImageElement.decode πŸ“‹Firefox7/9/2019 Safari3/31/20252092
css.properties.container-type.weak_containment πŸ“‹Firefox11/26/2024 Safari3/31/2025125
css.properties.writing-mode.sideways-lr Firefox12/15/2015 Safari3/31/20253394
css.properties.writing-mode.sideways-rl Firefox12/15/2015 Safari3/31/20253394
css.types.attr.declaration-value πŸ“‹Firefox10/24/2023 Safari3/31/2025524
css.types.gradient.conic-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
css.types.gradient.linear-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
css.types.gradient.radial-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
css.types.gradient.repeating-conic-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
css.types.gradient.repeating-linear-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
css.types.gradient.repeating-radial-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Safari3/31/202527
javascript.builtins.Iterator.Iterator πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.drop πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.every πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.filter πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.find πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.flatMap πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.forEach πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.from πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.map πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.reduce πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.some πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.take πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.Iterator.toArray πŸ“‹Firefox10/1/2024 Safari3/31/2025181
javascript.builtins.JSON.parse.reviver_parameter_context_argument πŸ“‹Firefox2/4/2025 Safari3/31/202555
webassembly.api.JSTag_static πŸ“‹Firefox10/1/2024 Safari3/31/2025181
webassembly.exceptionsFinal πŸ“‹Firefox10/1/2024 Safari3/31/2025181
api.Element.ariaActiveDescendantElement πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaControlsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaDescribedByElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaDetailsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaErrorMessageElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaFlowToElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaLabelledByElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.Element.ariaOwnsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaActiveDescendantElement πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaControlsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaDescribedByElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaDetailsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaErrorMessageElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaFlowToElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaLabelledByElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.ElementInternals.ariaOwnsElements πŸ“‹Safari3/27/2023 Firefox3/4/2025708
api.HTMLElement.autocorrect πŸ“‹Safari4/26/2021 Firefox3/4/20251408
api.HTMLElement.contentEditable.plaintext-only Safari7/20/2011 Firefox3/4/20254976
html.global_attributes.autocorrect πŸ“‹Safari4/26/2021 Firefox3/4/20251408
html.global_attributes.contenteditable.plaintext-only Safari6/7/2010 Firefox3/4/20255384
javascript.builtins.Intl.DurationFormat πŸ“‹Safari3/27/2023 Firefox3/4/2025708
javascript.builtins.Intl.DurationFormat.DurationFormat πŸ“‹Safari3/27/2023 Firefox3/4/2025708
javascript.builtins.Intl.DurationFormat.format πŸ“‹Safari3/27/2023 Firefox3/4/2025708
javascript.builtins.Intl.DurationFormat.formatToParts πŸ“‹Safari3/27/2023 Firefox3/4/2025708
javascript.builtins.Intl.DurationFormat.resolvedOptions πŸ“‹Safari3/27/2023 Firefox3/4/2025708
javascript.builtins.Intl.DurationFormat.supportedLocalesOf πŸ“‹Safari3/27/2023 Firefox3/4/2025708

2025/2

API First Browser Date Last Browser Date Days Notes
api.PublicKeyCredential.getClientCapabilities_static πŸ“‹Safari3/5/2024 Firefox2/4/2025336
api.RTCStatsReport.type_inbound-rtp.mid πŸ“‹Safari9/18/2023 Firefox2/4/2025505

2025/1

API First Browser Date Last Browser Date Days Notes
api.PushManager.supportedContentEncodings_static πŸ“‹Safari9/12/2022 Firefox1/7/2025848
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
javascript.builtins.Promise.try πŸ“‹Safari12/11/2024 Firefox1/7/202527
javascript.builtins.RegExp.escape πŸ“‹Safari12/11/2024 Firefox1/7/202527

2024/12

API First Browser Date Last Browser Date Days Notes
api.CSSNestedDeclarations πŸ“‹Firefox10/29/2024 Safari12/11/202443
api.CSSNestedDeclarations.style πŸ“‹Firefox10/29/2024 Safari12/11/202443
api.Element.auxclick_event πŸ“‹Firefox4/19/2017 Safari12/11/20242793
Firefox: Starting in Firefox 68, the auxclick event is used to trigger the new tab on middle-click action; previously, this had been done with the click event. Apps can prevent middle-click from opening new tabs (or middle-click to paste, if that feature is enabled) by intercepting auxclick on links, and auxclick event handlers can now open popups without triggering the popup blocker.
api.Element.auxclick_event.type_pointerevent Firefox8/6/2024 Safari12/11/2024127
api.Element.click_event.type_pointerevent Firefox8/6/2024 Safari12/11/2024127
api.Element.contextmenu_event.type_pointerevent Firefox8/6/2024 Safari12/11/2024127
api.PointerEvent.PointerEvent.options_altitudeAngle_parameter Firefox10/1/2024 Safari12/11/202471
api.PointerEvent.PointerEvent.options_azimuthAngle_parameter Firefox10/1/2024 Safari12/11/202471
api.PointerEvent.altitudeAngle πŸ“‹Firefox10/1/2024 Safari12/11/202471
api.PointerEvent.azimuthAngle πŸ“‹Firefox10/1/2024 Safari12/11/202471
api.PointerEvent.getCoalescedEvents πŸ“‹Firefox3/13/2018 Safari12/11/20242465
Firefox for Android: The method always returns an empty array, regardless of the user's actions.
api.PointerEvent.getPredictedEvents πŸ“‹Firefox6/1/2021 Safari12/11/20241289
css.at-rules.page πŸ“‹Firefox2/19/2013 Safari12/11/20244313
css.at-rules.page.size πŸ“‹Firefox12/7/2021 Safari12/11/20241100
css.at-rules.page.size.jis-b4 πŸ“‹Firefox12/7/2021 Safari12/11/20241100
css.at-rules.page.size.jis-b5 πŸ“‹Firefox12/7/2021 Safari12/11/20241100
css.properties.line-clamp.none Firefox7/9/2019 Safari12/11/20241982
css.properties.ruby-align πŸ“‹Firefox5/12/2015 Safari12/11/20243501
Internet Explorer: Internet Explorer 9 and later supports an earlier draft of CSS Ruby with non-standard values for this property: auto, left, center, right, distribute-letter, distribute-space, and line-edge.
css.properties.ruby-align.center πŸ“‹Firefox5/12/2015 Safari12/11/20243501
css.properties.ruby-align.space-around πŸ“‹Firefox5/12/2015 Safari12/11/20243501
css.properties.ruby-align.space-between πŸ“‹Firefox5/12/2015 Safari12/11/20243501
css.properties.ruby-align.start πŸ“‹Firefox5/12/2015 Safari12/11/20243501
css.properties.ruby-position πŸ“‹Firefox5/12/2015 Safari12/11/20243501
Chrome: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Chrome Android: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Edge: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Internet Explorer: Internet Explorer 9 and later support an old draft values: inline (equivalent of having display: inline on the ruby), and above (synonym of the modern over).Quest Browser: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Opera: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Opera Android: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Safari: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).Safari on iOS: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).WebView Android: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).WebView on iOS: Implemented as a non-standard, prefixed, version of ruby-position, -webkit-ruby-position: it has two properties: before and after (both equivalent, for ltr and rtl scripts to the standard over value used with ruby-align: start).
css.properties.ruby-position.over Firefox5/12/2015 Safari12/11/20243501
css.properties.ruby-position.under Firefox5/12/2015 Safari12/11/20243501
css.properties.scrollbar-gutter πŸ“‹Firefox2/8/2022 Safari12/11/20241037
css.properties.scrollbar-gutter.auto πŸ“‹Firefox2/8/2022 Safari12/11/20241037
css.properties.scrollbar-gutter.stable πŸ“‹Firefox2/8/2022 Safari12/11/20241037
css.properties.scrollbar-width πŸ“‹Firefox12/11/2018 Safari12/11/20242192
css.properties.scrollbar-width.auto πŸ“‹Firefox12/11/2018 Safari12/11/20242192
css.properties.scrollbar-width.none πŸ“‹Firefox12/11/2018 Safari12/11/20242192
css.properties.scrollbar-width.thin πŸ“‹Firefox12/11/2018 Safari12/11/20242192
css.properties.text-underline-offset.percentage πŸ“‹Firefox3/10/2020 Safari12/11/20241737
css.properties.text-underline-position.left πŸ“‹Firefox3/10/2020 Safari12/11/20241737
css.properties.text-underline-position.right πŸ“‹Firefox3/10/2020 Safari12/11/20241737
css.selectors.target-text πŸ“‹Firefox10/1/2024 Safari12/11/202471
javascript.builtins.DataView.getFloat16 πŸ“‹Firefox8/6/2024 Safari12/11/2024127
javascript.builtins.DataView.setFloat16 πŸ“‹Firefox8/6/2024 Safari12/11/2024127
javascript.builtins.Float16Array πŸ“‹Firefox8/6/2024 Safari12/11/2024127
javascript.builtins.Float16Array.Float16Array πŸ“‹Firefox8/6/2024 Safari12/11/2024127
javascript.builtins.Math.f16round πŸ“‹Firefox8/6/2024 Safari12/11/2024127
javascript.builtins.Uint8Array.fromBase64 πŸ“‹Firefox11/26/2024 Safari12/11/202415
javascript.builtins.Uint8Array.fromHex πŸ“‹Firefox11/26/2024 Safari12/11/202415
javascript.builtins.Uint8Array.setFromBase64 πŸ“‹Firefox11/26/2024 Safari12/11/202415
javascript.builtins.Uint8Array.setFromHex πŸ“‹Firefox11/26/2024 Safari12/11/202415
javascript.builtins.Uint8Array.toBase64 πŸ“‹Firefox11/26/2024 Safari12/11/202415
javascript.builtins.Uint8Array.toHex πŸ“‹Firefox11/26/2024 Safari12/11/202415
webassembly.garbage-collection πŸ“‹Firefox11/21/2023 Safari12/11/2024386
webassembly.tail-calls πŸ“‹Firefox12/19/2023 Safari12/11/2024358

2024/11

API First Browser Date Last Browser Date Days Notes
api.EventSource.worker_support Safari6/7/2010 Firefox11/26/20245286
Firefox: Not supported in service workers.Firefox for Android: Not supported in service workers.
api.HTMLMediaElement.waitingforkey_event πŸ“‹Safari3/25/2019 Firefox11/26/20242073
Firefox: The onwaitingforkey event handler property is not supported.Firefox for Android: The onwaitingforkey event handler property is not supported.
api.Request.Request.init_keepalive_parameter πŸ“‹Safari9/19/2019 Firefox11/26/20241895
api.Request.keepalive πŸ“‹Safari9/19/2019 Firefox11/26/20241895
api.ServiceWorkerContainer.worker_support Safari4/12/2018 Firefox11/26/20242420
api.WorkerNavigator.permissions πŸ“‹Safari3/27/2023 Firefox11/26/2024610
api.WorkerNavigator.serviceWorker πŸ“‹Safari4/12/2018 Firefox11/26/20242420
api.fetch.init_keepalive_parameter Safari9/19/2019 Firefox11/26/20241895

2024/10

API First Browser Date Last Browser Date Days Notes
api.HTMLImageElement.fetchPriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
api.HTMLLinkElement.fetchPriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
api.HTMLScriptElement.fetchPriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
api.HTMLVideoElement.cancelVideoFrameCallback πŸ“‹Safari3/14/2022 Firefox10/29/2024960
api.HTMLVideoElement.requestVideoFrameCallback πŸ“‹Safari3/14/2022 Firefox10/29/2024960
api.MediaStreamTrack.getCapabilities πŸ“‹Safari9/19/2017 Firefox10/29/20242597
api.Notification.silent πŸ“‹Safari7/24/2023 Firefox10/29/2024463
api.Permissions.permission_camera Safari9/12/2022 Firefox10/29/2024778
api.Permissions.permission_microphone Safari9/12/2022 Firefox10/29/2024778
api.Request.Request.init_priority_parameter πŸ“‹Safari12/11/2023 Firefox10/29/2024323
api.WebGL2RenderingContext.drawingBufferColorSpace πŸ“‹Safari3/27/2023 Firefox10/29/2024582
Firefox: Accidental early exposure with no functionality.Firefox for Android: Accidental early exposure with no functionality.
api.WebGLRenderingContext.drawingBufferColorSpace πŸ“‹Safari3/27/2023 Firefox10/29/2024582
Firefox: Accidental early exposure with no functionality.Firefox for Android: Accidental early exposure with no functionality.
api.fetch.init_priority_parameter Safari12/11/2023 Firefox10/29/2024323
html.elements.img.fetchpriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
html.elements.link.fetchpriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
html.elements.script.fetchpriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
http.headers.Link.fetchpriority πŸ“‹Safari12/11/2023 Firefox10/29/2024323
html.elements.a.text_fragments Safari10/24/2022 Firefox10/1/2024708

2024/9

API First Browser Date Last Browser Date Days Notes
api.Blob.bytes πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.CanvasRenderingContext2D.filter πŸ“‹Firefox9/20/2016 Safari9/16/20242918
api.ContentVisibilityAutoStateChangeEvent πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.ContentVisibilityAutoStateChangeEvent.ContentVisibilityAutoStateChangeEvent πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.ContentVisibilityAutoStateChangeEvent.skipped πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.Element.ariaBrailleLabel πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.Element.ariaBrailleRoleDescription πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.Element.attachShadow.options_serializable_parameter πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.Element.contentvisibilityautostatechange_event πŸ“‹Firefox9/3/2024 Safari9/16/202413
Firefox: The oncontentvisibilityautostatechange event handler property is not supported.Firefox for Android: The oncontentvisibilityautostatechange event handler property is not supported.
api.Element.getHTML πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.ElementInternals.ariaBrailleLabel πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.ElementInternals.ariaBrailleRoleDescription πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.GeolocationCoordinates.toJSON πŸ“‹Firefox8/6/2024 Safari9/16/202441
api.GeolocationPosition.toJSON πŸ“‹Firefox8/6/2024 Safari9/16/202441
api.HTMLCanvasElement.getContext.2d_context.options_willReadFrequently_parameter πŸ“‹Firefox3/18/2014 Safari9/16/20243835
api.HTMLInputElement.selectionchange_event πŸ“‹Firefox9/7/2021 Safari9/16/20241105
Chrome: Before Chrome 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.Chrome Android: Before Chrome Android 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.Edge: Before Edge 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.Opera: Before Opera 113, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.Opera Android: Before Opera Android 84, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.Safari: Before Safari 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <input> elements.Safari on iOS: Before Safari on iOS 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <input> elements.Samsung Internet: Before Samsung Internet 28.0, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.WebView Android: Before WebView Android 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <input> elements.WebView on iOS: Before WebView on iOS 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <input> elements.
api.HTMLTemplateElement.shadowRootClonable πŸ“‹Firefox4/16/2024 Safari9/16/2024153
api.HTMLTemplateElement.shadowRootDelegatesFocus πŸ“‹Firefox2/20/2024 Safari9/16/2024209
api.HTMLTemplateElement.shadowRootSerializable πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.HTMLTextAreaElement.selectionchange_event πŸ“‹Firefox9/7/2021 Safari9/16/20241105
Chrome: Before Chrome 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.Chrome Android: Before Chrome Android 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.Edge: Before Edge 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.Opera: Before Opera 113, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.Opera Android: Before Opera Android 84, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.Safari: Before Safari 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <textarea> elements.Safari on iOS: Before Safari on iOS 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <textarea> elements.Samsung Internet: Before Samsung Internet 28.0, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.WebView Android: Before WebView Android 127, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 40840956 for firing the event on <textarea> elements.WebView on iOS: Before WebView on iOS 18, a selectionchange event was fired on Document, see Document's selectionchange event. See bug 271033 for firing the event on <textarea> elements.
api.Navigator.cookieEnabled πŸ“‹Firefox11/9/2004 Safari9/16/20247251
Firefox: Before Firefox 8, navigator.cookieEnabled would report the wrong result if a site exception was in place for the page on which the check was performed. This has been fixed.Firefox for Android: Before Firefox for Android 8, navigator.cookieEnabled would report the wrong result if a site exception was in place for the page on which the check was performed. This has been fixed.Internet Explorer: navigator.cookieEnabled returns true even if the browser is set to block cookies (for example, if the page is in the Restricted sites security zone).Safari: Returns true even if the browser is set to block cookies if navigator.cookieEnabled is invoked inside a third-party iframe)Safari on iOS: Returns true even if the browser is set to block cookies if navigator.cookieEnabled is invoked inside a third-party iframe)WebView on iOS: Returns true even if the browser is set to block cookies if navigator.cookieEnabled is invoked inside a third-party iframe)
api.PushMessageData.bytes πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.Request.bytes πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.Response.bytes πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.ShadowRoot.getHTML πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.ShadowRoot.serializable πŸ“‹Firefox7/9/2024 Safari9/16/202469
api.URL.parse_static πŸ“‹Firefox5/14/2024 Safari9/16/2024125
css.properties.backdrop-filter πŸ“‹Firefox7/26/2022 Safari9/16/2024783
Firefox: Before Firefox 123, the property was not supported on systems with unknown GPU vendor (see bug 1868737).Firefox for Android: Before Firefox for Android 123, the property was not supported on systems with unknown GPU vendor (see bug 1868737).
css.properties.content-visibility πŸ“‹Firefox4/16/2024 Safari9/16/2024153
css.properties.content-visibility.hidden πŸ“‹Firefox4/16/2024 Safari9/16/2024153
css.properties.content-visibility.visible πŸ“‹Firefox4/16/2024 Safari9/16/2024153
css.properties.offset-path.basic_shape πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.border-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.content-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.fill-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.none πŸ“‹Firefox1/7/2020 Safari9/16/20241714
css.properties.offset-path.padding-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.stroke-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.offset-path.view-box πŸ“‹Firefox1/23/2024 Safari9/16/2024237
css.properties.white-space.collapse πŸ“‹Firefox3/19/2024 Safari9/16/2024181
css.properties.white-space.preserve πŸ“‹Firefox3/19/2024 Safari9/16/2024181
css.properties.white-space.preserve-breaks πŸ“‹Firefox3/19/2024 Safari9/16/2024181
css.properties.white-space.wrap πŸ“‹Firefox3/19/2024 Safari9/16/2024181
css.types.color.color.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Safari: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified as percentages with units (%).Safari on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified as percentages with units (%).WebView on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified as percentages with units (%).
css.types.color.hsl.mixed_type_parameters Firefox1/23/2024 Safari9/16/2024237
css.types.color.hsl.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Chrome: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Chrome Android: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Edge: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Opera: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Opera Android: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Safari: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for s and l).Safari on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for s and l).Samsung Internet: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.WebView Android: s and l channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require s and l values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.WebView on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for s and l).
css.types.color.hwb.mixed_type_parameters Firefox1/23/2024 Safari9/16/2024237
css.types.color.hwb.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Chrome: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Chrome Android: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Edge: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Opera: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Opera Android: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.Safari: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for w and b).Safari on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for w and b).Samsung Internet: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.WebView Android: w and b channel values incorrectly resolve to numbers between 0-1 rather than 0-100. As a result, channel value calculations require w and b values to be specified as decimal percentage equivalents (e.g. 0.2 for 20%). See bug 330096624.WebView on iOS: Implementation based on older spec version. As a result, calculations with channel values do not work correctly, requiring values to be specified with units (deg for h, % for w and b).
css.types.color.lch.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Safari: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).Safari on iOS: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).WebView on iOS: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).
css.types.color.oklch.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Chrome: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Chrome Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Edge: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Opera: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Opera Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Safari: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).Safari on iOS: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).Samsung Internet: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.WebView Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.WebView on iOS: Implementation based on older spec version. As a result, calculations with h channel values do not work correctly, requiring values to be specified with units (deg).
css.types.color.rgb.mixed_type_parameters Firefox5/9/2023 Safari9/16/2024496
css.types.color.rgb.relative_syntax πŸ“‹Firefox7/9/2024 Safari9/16/202469
Chrome: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.Chrome Android: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.Edge: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.Opera: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.Opera Android: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.Safari: Implementation based on older spec version. As a result, channel value calculations do not work correctly, requiring values to be specified as percentages with units (e.g. 30%, which would be equivalent to a 76.5 <number> value). See bug 267647.Safari on iOS: Implementation based on older spec version. As a result, channel value calculations do not work correctly, requiring values to be specified as percentages with units (e.g. 30%, which would be equivalent to a 76.5 <number> value). See bug 267647.Samsung Internet: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.WebView Android: Channel values incorrectly resolve to numbers between 0-1 rather than 0-255. As a result, channel value calculations require values to be specified as decimal percentage equivalents (e.g. 0.3 for 30%, which would be equivalent to a 76.5 <number> value). See bug 41490327.WebView on iOS: Implementation based on older spec version. As a result, channel value calculations do not work correctly, requiring values to be specified as percentages with units (e.g. 30%, which would be equivalent to a 76.5 <number> value). See bug 267647.
webassembly.typedFunctionReferences πŸ“‹Firefox11/21/2023 Safari9/16/2024300
api.EncodedVideoChunk πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.EncodedVideoChunk πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.byteLength πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.copyTo πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.duration πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.timestamp πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.EncodedVideoChunk.type πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.HTMLDetailsElement.name πŸ“‹Safari12/11/2023 Firefox9/3/2024267
api.SubtleCrypto.deriveBits.x25519 πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.SubtleCrypto.deriveKey.x25519 πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.SubtleCrypto.exportKey.x25519 πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.SubtleCrypto.generateKey.x25519 πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.SubtleCrypto.importKey.x25519 πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.VideoColorSpace πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoColorSpace.VideoColorSpace πŸ“‹Safari9/18/2023 Firefox9/3/2024351
api.VideoColorSpace.fullRange πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoColorSpace.matrix πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoColorSpace.primaries πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoColorSpace.toJSON πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoColorSpace.transfer πŸ“‹Safari3/14/2022 Firefox9/3/2024904
api.VideoDecoder πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.VideoDecoder πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.close πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.configure πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.decode πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.decodeQueueSize πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.dequeue_event πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.flush πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.isConfigSupported_static πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.reset πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoDecoder.state πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.VideoEncoder πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.close πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.configure πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.dequeue_event πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.encode πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.encodeQueueSize πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.flush πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.isConfigSupported_static πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.reset πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoEncoder.state πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.VideoFrame πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.allocationSize πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.clone πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.close πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.codedHeight πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.codedRect πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.codedWidth πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.colorSpace πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.copyTo πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.displayHeight πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.displayWidth πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.duration πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.format πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.timestamp πŸ“‹Safari3/27/2023 Firefox9/3/2024526
api.VideoFrame.visibleRect πŸ“‹Safari3/27/2023 Firefox9/3/2024526
css.properties.hyphens.language_czech Safari3/21/2016 Firefox9/3/20243088
html.elements.details.name Safari12/11/2023 Firefox9/3/2024267
http.headers.Content-Security-Policy.report-to πŸ“‹Safari3/27/2023 Firefox9/3/2024526
http.headers.Reporting-Endpoints πŸ“‹Safari3/27/2023 Firefox9/3/2024526

2024/8

API First Browser Date Last Browser Date Days Notes
api.CSSStartingStyleRule πŸ“‹Safari5/13/2024 Firefox8/6/202485
api.RTCDTMFSender.canInsertDTMF πŸ“‹Safari3/24/2020 Firefox8/6/20241596
api.SubtleCrypto.exportKey.ed25519 πŸ“‹Safari9/18/2023 Firefox8/6/2024323
api.SubtleCrypto.generateKey.ed25519 πŸ“‹Safari9/18/2023 Firefox8/6/2024323
api.SubtleCrypto.importKey.ed25519 πŸ“‹Safari9/18/2023 Firefox8/6/2024323
api.SubtleCrypto.sign.ed25519 πŸ“‹Safari9/18/2023 Firefox8/6/2024323
Safari: Generates randomized signatures as per draft-irtf-cfrg-det-sigs-with-noise, instead of deterministic signatures as per RFC 8032.Safari on iOS: Generates randomized signatures as per draft-irtf-cfrg-det-sigs-with-noise, instead of deterministic signatures as per RFC 8032.WebView on iOS: Generates randomized signatures as per draft-irtf-cfrg-det-sigs-with-noise, instead of deterministic signatures as per RFC 8032.
api.SubtleCrypto.verify.ed25519 πŸ“‹Safari9/18/2023 Firefox8/6/2024323
api.TextEvent πŸ“‹Safari10/26/2007 Firefox8/6/20246129
api.TextEvent.data πŸ“‹Safari10/26/2007 Firefox8/6/20246129
api.TextEvent.initTextEvent πŸ“‹Safari10/26/2007 Firefox8/6/20246129
css.at-rules.starting-style πŸ“‹Safari5/13/2024 Firefox8/6/202485
css.properties.transition.transition-behavior Safari3/5/2024 Firefox8/6/2024154
css.properties.transition-behavior πŸ“‹Safari3/5/2024 Firefox8/6/2024154
css.properties.transition-behavior.allow-discrete πŸ“‹Safari3/5/2024 Firefox8/6/2024154
css.properties.transition-behavior.normal πŸ“‹Safari3/5/2024 Firefox8/6/2024154
javascript.regular_expressions.named_capturing_group.duplicate_named_capturing_groups Safari9/18/2023 Firefox8/6/2024323

2024/7

API First Browser Date Last Browser Date Days Notes
css.properties.align-content.flex_context.safe_unsafe Firefox10/23/2018 Safari7/29/20242106
Chrome: Before version 115, this value is recognized, but has no effect.Chrome Android: Before version 115, this value is recognized, but has no effect.Edge: Before version 115, this value is recognized, but has no effect.Opera: Before version 101, this value is recognized, but has no effect.Opera Android: Before version 77, this value is recognized, but has no effect.Samsung Internet: Before version 23.0, this value is recognized, but has no effect.WebView Android: Before version 115, this value is recognized, but has no effect.
css.properties.align-items.flex_context.safe_unsafe Firefox10/23/2018 Safari7/29/20242106
Chrome: Before version 115, this value is recognized, but has no effect.Chrome Android: Before version 115, this value is recognized, but has no effect.Edge: Before version 115, this value is recognized, but has no effect.Opera: Before version 101, this value is recognized, but has no effect.Opera Android: Before version 77, this value is recognized, but has no effect.Samsung Internet: Before version 23.0, this value is recognized, but has no effect.WebView Android: Before version 115, this value is recognized, but has no effect.
css.properties.align-self.flex_context.safe_unsafe Firefox10/23/2018 Safari7/29/20242106
Chrome: Before version 115, this value is recognized, but has no effect.Chrome Android: Before version 115, this value is recognized, but has no effect.Edge: Before version 115, this value is recognized, but has no effect.Opera: Before version 101, this value is recognized, but has no effect.Opera Android: Before version 77, this value is recognized, but has no effect.Samsung Internet: Before version 23.0, this value is recognized, but has no effect.WebView Android: Before version 115, this value is recognized, but has no effect.
css.properties.justify-content.flex_context.safe_unsafe Firefox10/23/2018 Safari7/29/20242106
Chrome: Before version 115, this value is recognized, but has no effect.Chrome Android: Before version 115, this value is recognized, but has no effect.Edge: Before version 115, this value is recognized, but has no effect.Opera: Before version 101, this value is recognized, but has no effect.Opera Android: Before version 77, this value is recognized, but has no effect.Samsung Internet: Before version 23.0, this value is recognized, but has no effect.WebView Android: Before version 115, this value is recognized, but has no effect.
api.CSS.registerProperty_static πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.CSSPropertyRule πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.CSSPropertyRule.inherits πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.CSSPropertyRule.initialValue πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.CSSPropertyRule.name πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.CSSPropertyRule.syntax πŸ“‹Safari3/27/2023 Firefox7/9/2024470
api.HTMLBaseElement.href.forbid_special_characters Safari9/12/2022 Firefox7/9/2024666
api.RTCRtpReceiver.getParameters πŸ“‹Safari9/19/2017 Firefox7/9/20242485
api.RTCRtpReceiver.getParameters.return_object_property_codecs πŸ“‹Safari9/19/2017 Firefox7/9/20242485
api.RTCRtpSender.getParameters.return_object_property_codecs πŸ“‹Safari9/19/2017 Firefox7/9/20242485
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpSender.setParameters.parameters_codecs_parameter πŸ“‹Safari3/25/2019 Firefox7/9/20241933
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpTransceiver.setCodecPreferences πŸ“‹Safari3/24/2020 Firefox7/9/20241568
css.at-rules.property πŸ“‹Safari3/27/2023 Firefox7/9/2024470
css.at-rules.property.inherits πŸ“‹Safari3/27/2023 Firefox7/9/2024470
css.at-rules.property.initial-value πŸ“‹Safari3/27/2023 Firefox7/9/2024470
css.at-rules.property.syntax πŸ“‹Safari3/27/2023 Firefox7/9/2024470
css.properties.content.alt_text Safari3/5/2024 Firefox7/9/2024126
css.types.calc.color_component Safari3/27/2023 Firefox7/9/2024470
css.types.color.lab.relative_syntax πŸ“‹Safari3/27/2023 Firefox7/9/2024470
css.types.color.oklab.relative_syntax πŸ“‹Safari3/27/2023 Firefox7/9/2024470
Chrome: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Chrome Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Edge: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Opera: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Opera Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.Samsung Internet: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.WebView Android: l channel values incorrectly resolve to numbers between 0-100 rather than 0-1. As a result, channel value calculations require l values to be specified as percentage numbers without units (e.g. 20 for 0.2). See bug 40940488.
javascript.builtins.ArrayBuffer.ArrayBuffer.maxByteLength_option πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.ArrayBuffer.maxByteLength πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.ArrayBuffer.resizable πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.ArrayBuffer.resize πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer.maxByteLength_option πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.SharedArrayBuffer.grow πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.SharedArrayBuffer.growable πŸ“‹Safari3/27/2023 Firefox7/9/2024470
javascript.builtins.SharedArrayBuffer.maxByteLength πŸ“‹Safari3/27/2023 Firefox7/9/2024470

2024/6

API First Browser Date Last Browser Date Days Notes
api.Clipboard.read πŸ“‹Safari3/24/2020 Firefox6/11/20241540
Chrome: The user must grant the clipboard-read permission.Chrome Android: The user must grant the clipboard-read permission.Edge: The user must grant the clipboard-read permission.Firefox: This method must be called within user gesture event handlers.Firefox: A paste prompt is displayed when the clipboard is read. If the clipboard contains same-origin content, the prompt is suppressed.Firefox: Web extensions with the clipboardRead permission in their manifest can read data without the paste prompt displaying. Prior to Firefox 147, extensions without this permission were unable to read clipboard data.Firefox for Android: This method must be called within user gesture event handlers.Firefox for Android: A paste prompt is displayed when the clipboard is read. If the clipboard contains same-origin content, the prompt is suppressed.Firefox for Android: Web extensions with the clipboardRead permission in their manifest can read data without the paste prompt displaying. Prior to Firefox for Android 147, extensions without this permission were unable to read clipboard data.Quest Browser: The user must grant the clipboard-read permission.Opera: The user must grant the clipboard-read permission.Opera Android: The user must grant the clipboard-read permission.Samsung Internet: The user must grant the clipboard-read permission.WebView Android: The user must grant the clipboard-read permission.
api.Clipboard.type_image-png Safari3/24/2020 Firefox6/11/20241540
api.Clipboard.type_text-html Safari3/24/2020 Firefox6/11/20241540
api.Clipboard.type_text-plain Safari3/24/2020 Firefox6/11/20241540
api.Clipboard.write πŸ“‹Safari3/24/2020 Firefox6/11/20241540
Chrome: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Chrome: Before version 107, the user must grant the clipboard-write permission.Chrome Android: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Chrome Android: Before version 107, the user must grant the clipboard-write permission.Firefox: This method must be called within user gesture event handlers.Firefox: Web extensions with the clipboardWrite permission in their manifest can write data without a user gesture.Firefox for Android: This method must be called within user gesture event handlers.Firefox for Android: Web extensions with the clipboardWrite permission in their manifest can write data without a user gesture.Quest Browser: From version false, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Quest Browser: Before version false, the user must grant the clipboard-write permission.Opera: From version 93, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Opera: Before version 93, the user must grant the clipboard-write permission.Opera Android: From version 73, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Opera Android: Before version 73, the user must grant the clipboard-write permission.Samsung Internet: From version 21.0, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Samsung Internet: Before version 21.0, the user must grant the clipboard-write permission.WebView Android: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.WebView Android: Before version 107, the user must grant the clipboard-write permission.
api.ClipboardItem πŸ“‹Safari3/24/2020 Firefox6/11/20241540
api.ClipboardItem.ClipboardItem πŸ“‹Safari3/24/2020 Firefox6/11/20241540
Chrome: Only accepts a Blob or a Promise resolving to a Blob as the item data.Chrome: Only accepts a Blob as the item data. See bug 40103226.Chrome Android: The ClipboardItem constructor only accepts a blob as the item data, but not strings or Promises that resolve to strings or blobs. See bug 40103226.Edge: Only accepts a Blob or a Promise resolving to a Blob as the item data.Edge: Only accepts a Blob as the item data. See bug 40103226.Quest Browser: The ClipboardItem constructor only accepts a blob as the item data, but not strings or Promises that resolve to strings or blobs. See bug 40103226.Opera: Only accepts a Blob or a Promise resolving to a Blob as the item data.Opera: Only accepts a Blob as the item data. See bug 40103226.Opera Android: The ClipboardItem constructor only accepts a blob as the item data, but not strings or Promises that resolve to strings or blobs. See bug 40103226.Samsung Internet: The ClipboardItem constructor only accepts a blob as the item data, but not strings or Promises that resolve to strings or blobs. See bug 40103226.WebView Android: The ClipboardItem constructor only accepts a blob as the item data, but not strings or Promises that resolve to strings or blobs. See bug 40103226.
api.ClipboardItem.getType πŸ“‹Safari3/24/2020 Firefox6/11/20241540
api.ClipboardItem.presentationStyle πŸ“‹Safari3/24/2020 Firefox6/11/20241540
api.ClipboardItem.types πŸ“‹Safari3/24/2020 Firefox6/11/20241540
api.HTMLBaseElement.href.forbid_data_javascript_urls Safari12/11/2023 Firefox6/11/2024183
api.VTTCue.text.all_html_character_references Safari5/13/2024 Firefox6/11/202429
css.types.gradient.conic-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.conic-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.linear-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.linear-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.radial-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.radial-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-conic-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-conic-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-linear-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-linear-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-radial-gradient.hue_interpolation_method Safari12/13/2022 Firefox6/11/2024546
css.types.gradient.repeating-radial-gradient.interpolation_color_space Safari12/13/2022 Firefox6/11/2024546
html.elements.base.href.forbid_data_javascript_urls Safari3/24/2020 Firefox6/11/20241540
html.elements.link.rel.dns-prefetch πŸ“‹Safari6/7/2010 Firefox6/11/20245118
Firefox: Only HTTP pages were supported.Firefox for Android: Only HTTP pages were supported.
javascript.builtins.Set.difference πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.intersection πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.isDisjointFrom πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.isSubsetOf πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.isSupersetOf πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.symmetricDifference πŸ“‹Safari9/18/2023 Firefox6/11/2024267
javascript.builtins.Set.union πŸ“‹Safari9/18/2023 Firefox6/11/2024267

2024/5

API First Browser Date Last Browser Date Days Notes
api.CustomStateSet πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.@@iterator πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.add πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.clear πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.delete πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.entries πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.forEach πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.has πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.keys πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.size πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.CustomStateSet.values πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.ElementInternals.states πŸ“‹Safari3/5/2024 Firefox5/14/202470
api.IDBFactory.databases πŸ“‹Safari9/16/2020 Firefox5/14/20241336
api.IDBTransaction.durability πŸ“‹Safari9/20/2021 Firefox5/14/2024967
api.Navigator.wakeLock πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.Permissions.permission_screen-wake-lock πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Firefox: The value is recognized, but has no effect.Firefox for Android: The value is recognized, but has no effect.
api.RTCIceCandidate.address πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.component πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.foundation πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.port πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.priority πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.protocol πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.relatedAddress πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.relatedPort πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.tcpType πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.RTCIceCandidate.type πŸ“‹Safari4/26/2021 Firefox5/14/20241114
api.Selection.direction πŸ“‹Safari9/18/2023 Firefox5/14/2024239
api.WakeLock πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLock.request πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLockSentinel πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLockSentinel.release πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLockSentinel.release_event πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLockSentinel.released πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
api.WakeLockSentinel.type πŸ“‹Safari3/27/2023 Firefox5/14/2024414
Safari on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.WebView on iOS: Does not work in standalone Home Screen Web Apps. See bug 254545.
css.properties.zoom πŸ“‹Safari3/18/2008 Firefox5/14/20245901
Firefox: Before Firefox 131, SVG elements are not zoomed properly. See bug 1905023 and bug 878346.Firefox for Android: Before Firefox for Android 131, SVG elements are not zoomed properly. See bug 1905023 and bug 878346.
css.selectors.state πŸ“‹Safari3/5/2024 Firefox5/14/202470
Chrome: Uses a dashed-ident (such as :--foo) instead of :state().Chrome Android: Uses a dashed-ident (such as :--foo) instead of :state().Edge: Uses a dashed-ident (such as :--foo) instead of :state().Quest Browser: Uses a dashed-ident (such as :--foo) instead of :state().Opera: Uses a dashed-ident (such as :--foo) instead of :state().Opera Android: Uses a dashed-ident (such as :--foo) instead of :state().Samsung Internet: Uses a dashed-ident (such as :--foo) instead of :state().WebView Android: Uses a dashed-ident (such as :--foo) instead of :state().
html.elements.iframe.allow.screen-wake-lock πŸ“‹Safari3/27/2023 Firefox5/14/2024414
api.CSSImportRule.supportsText πŸ“‹Firefox6/6/2023 Safari5/13/2024342
css.at-rules.import.supports πŸ“‹Firefox7/4/2023 Safari5/13/2024314
css.properties.text-wrap.balance πŸ“‹Firefox12/19/2023 Safari5/13/2024146
css.properties.text-wrap.stable πŸ“‹Firefox12/19/2023 Safari5/13/2024146
css.properties.text-wrap-style πŸ“‹Firefox3/19/2024 Safari5/13/202455
css.properties.text-wrap-style.auto πŸ“‹Firefox3/19/2024 Safari5/13/202455
css.properties.text-wrap-style.balance πŸ“‹Firefox3/19/2024 Safari5/13/202455
css.properties.text-wrap-style.stable πŸ“‹Firefox3/19/2024 Safari5/13/202455
css.types.color.light-dark πŸ“‹Firefox11/21/2023 Safari5/13/2024174
html.elements.template.shadowrootclonable πŸ“‹Firefox4/16/2024 Safari5/13/202427

2024/4

API First Browser Date Last Browser Date Days Notes
api.Clipboard.readText πŸ“‹Safari3/24/2020 Firefox4/16/20241484
Chrome: The user must grant the clipboard-read permission.Chrome Android: The user must grant the clipboard-read permission.Edge: The user must grant the clipboard-read permission.Firefox: This method must be called within user gesture event handlers.Firefox: A paste prompt is displayed when the clipboard is read. If the clipboard contains same-origin content, the prompt is suppressed.Firefox: Web extensions with the clipboardRead permission in their manifest can read data without the paste prompt displaying. Prior to Firefox 147, extensions without this permission were unable to read clipboard data.Firefox for Android: This method must be called within user gesture event handlers.Firefox for Android: A paste prompt is displayed when the clipboard is read. If the clipboard contains same-origin content, the prompt is suppressed.Firefox for Android: Web extensions with the clipboardRead permission in their manifest can read data without the paste prompt displaying. Prior to Firefox for Android 147, extensions without this permission were unable to read clipboard data.Quest Browser: The user must grant the clipboard-read permission.Opera: The user must grant the clipboard-read permission.Opera Android: The user must grant the clipboard-read permission.Samsung Internet: The user must grant the clipboard-read permission.WebView Android: The user must grant the clipboard-read permission.
api.HTMLButtonElement.popoverTargetAction πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLButtonElement.popoverTargetElement πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.beforetoggle_event πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.beforetoggle_event.popover_elements πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.hidePopover πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.popover πŸ“‹Safari9/18/2023 Firefox4/16/2024211
Safari on iOS: On iOS and iPadOS, popovers are not dismissed when the user taps outside of the popover area, see bug 267688.WebView on iOS: On iOS and iPadOS, popovers are not dismissed when the user taps outside of the popover area, see bug 267688.
api.HTMLElement.showPopover πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.togglePopover πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.togglePopover.returns_boolean Safari9/18/2023 Firefox4/16/2024211
api.HTMLElement.toggle_event.popover_elements πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLInputElement.popoverTargetAction πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.HTMLInputElement.popoverTargetElement πŸ“‹Safari9/18/2023 Firefox4/16/2024211
api.RTCDtlsTransport.iceTransport πŸ“‹Safari3/14/2022 Firefox4/16/2024764
api.RTCIceTransport πŸ“‹Safari9/19/2017 Firefox4/16/20242401
api.RTCIceTransport.gatheringState πŸ“‹Safari9/19/2017 Firefox4/16/20242401
api.RTCIceTransport.gatheringstatechange_event πŸ“‹Safari3/14/2022 Firefox4/16/2024764
api.RTCIceTransport.state πŸ“‹Safari9/19/2017 Firefox4/16/20242401
api.RTCIceTransport.statechange_event πŸ“‹Safari3/14/2022 Firefox4/16/2024764
css.properties.align-content.block_context πŸ“‹Safari3/5/2024 Firefox4/16/202442
css.properties.transform-box.content-box πŸ“‹Safari3/24/2020 Firefox4/16/20241484
css.properties.transform-box.stroke-box πŸ“‹Safari3/24/2020 Firefox4/16/20241484
css.selectors.backdrop.popover Safari9/18/2023 Firefox4/16/2024211
css.selectors.popover-open πŸ“‹Safari9/18/2023 Firefox4/16/2024211
html.elements.button.popovertarget πŸ“‹Safari9/18/2023 Firefox4/16/2024211
html.elements.button.popovertargetaction πŸ“‹Safari9/18/2023 Firefox4/16/2024211
html.elements.input.popovertarget πŸ“‹Safari9/18/2023 Firefox4/16/2024211
html.elements.input.popovertargetaction πŸ“‹Safari9/18/2023 Firefox4/16/2024211
html.global_attributes.popover πŸ“‹Safari9/18/2023 Firefox4/16/2024211
javascript.builtins.Intl.Segmenter πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segmenter.Segmenter πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segmenter.resolvedOptions πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segmenter.segment πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segmenter.supportedLocalesOf πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segments πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segments.@@iterator πŸ“‹Safari4/26/2021 Firefox4/16/20241086
javascript.builtins.Intl.Segments.containing πŸ“‹Safari4/26/2021 Firefox4/16/20241086

2024/3

API First Browser Date Last Browser Date Days Notes
api.AbortSignal.any_static πŸ“‹Safari3/5/2024 Firefox3/19/202414
api.WebSocket.WebSocket.url_parameter_http_https_relative Safari1/22/2024 Firefox3/19/202457
css.properties.text-wrap.nowrap πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.text-wrap.wrap πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.text-wrap-mode πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.text-wrap-mode.nowrap Safari3/5/2024 Firefox3/19/202414
css.properties.text-wrap-mode.wrap Safari3/5/2024 Firefox3/19/202414
css.properties.white-space-collapse πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.white-space-collapse.break-spaces πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.white-space-collapse.collapse πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.white-space-collapse.preserve πŸ“‹Safari3/5/2024 Firefox3/19/202414
css.properties.white-space-collapse.preserve-breaks πŸ“‹Safari3/5/2024 Firefox3/19/202414
api.DOMMatrixReadOnly.scaleNonUniform πŸ“‹Firefox10/14/2014 Safari3/5/20243430
api.Element.ariaDescription πŸ“‹Firefox10/24/2023 Safari3/5/2024133
api.Element.attachShadow.options_clonable_parameter πŸ“‹Firefox2/20/2024 Safari3/5/202414
api.Element.checkVisibility πŸ“‹Firefox10/18/2022 Safari3/5/2024504
api.Element.checkVisibility.options_checkOpacity_parameter πŸ“‹Firefox10/18/2022 Safari3/5/2024504
api.Element.checkVisibility.options_checkVisibilityCSS_parameter πŸ“‹Firefox10/18/2022 Safari3/5/2024504
api.Element.checkVisibility.options_contentVisibilityAuto_parameter πŸ“‹Firefox1/23/2024 Safari3/5/202442
api.Element.checkVisibility.options_opacityProperty_parameter πŸ“‹Firefox1/23/2024 Safari3/5/202442
api.Element.checkVisibility.options_visibilityProperty_parameter πŸ“‹Firefox1/23/2024 Safari3/5/202442
api.HTMLInputElement.showPicker.date_input Firefox5/31/2022 Safari3/5/2024644
api.HTMLInputElement.showPicker.datetime_local_input Firefox5/31/2022 Safari3/5/2024644
api.SVGFESpecularLightingElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Safari3/5/20245740
api.SVGFESpecularLightingElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Safari3/5/20245740
api.ShadowRoot.clonable πŸ“‹Firefox2/20/2024 Safari3/5/202414
css.properties.rx πŸ“‹Firefox9/3/2019 Safari3/5/20241645
Safari: Before Safari 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: Before Safari on iOS 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: Before WebView on iOS 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.
css.properties.rx.auto πŸ“‹Firefox9/3/2019 Safari3/5/20241645
css.properties.ry πŸ“‹Firefox9/3/2019 Safari3/5/20241645
Safari: Before Safari 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.Safari on iOS: Before Safari on iOS 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.WebView on iOS: Before WebView on iOS 17.4, the value was recognized, but had no effect, and was only recognized as an attribute applied to the SVG element. See bug 266090.
css.properties.ry.auto πŸ“‹Firefox9/3/2019 Safari3/5/20241645
css.properties.text-decoration-thickness.percentage Firefox3/10/2020 Safari3/5/20241456
css.properties.text-wrap πŸ“‹Firefox12/19/2023 Safari3/5/202477
css.properties.text-wrap.auto πŸ“‹Firefox12/19/2023 Safari3/5/202477
css.properties.writing-mode.vertical_oriented_form_controls Firefox11/21/2023 Safari3/5/2024105
Chrome: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Chrome: Supported for select, button, textarea and textual input elements.Chrome: Only supported for select and button elements.Chrome Android: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Chrome Android: Supported for select, button, textarea and textual input elements.Chrome Android: Only supported for select and button elements.Edge: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Edge: Supported for select, button, textarea and textual input elements.Edge: Only supported for select and button elements.Opera: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Opera: Supported for select, button, textarea and textual input elements.Opera: Only supported for select and button elements.Opera Android: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Opera Android: Supported for select, button, textarea and textual input elements.Opera Android: Only supported for select and button elements.Safari: Support for range sliders, textual inputs, and textareas onlySafari on iOS: Support for range sliders, textual inputs, and textareas onlySamsung Internet: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.Samsung Internet: Supported for select, button, textarea and textual input elements.WebView Android: Supported for select, button, textarea, textual input, range slider, meter, and progress elements.WebView Android: Supported for select, button, textarea and textual input elements.WebView Android: Only supported for select and button elements.WebView on iOS: Support for range sliders, textual inputs, and textareas only
css.selectors.backdrop.inherit_from_originating_element Firefox11/21/2023 Safari3/5/2024105
javascript.builtins.ArrayBuffer.detached πŸ“‹Firefox1/23/2024 Safari3/5/202442
javascript.builtins.ArrayBuffer.transfer πŸ“‹Firefox1/23/2024 Safari3/5/202442
javascript.builtins.ArrayBuffer.transferToFixedLength πŸ“‹Firefox1/23/2024 Safari3/5/202442
javascript.builtins.Map.groupBy πŸ“‹Firefox10/24/2023 Safari3/5/2024133
javascript.builtins.Object.groupBy πŸ“‹Firefox10/24/2023 Safari3/5/2024133
javascript.builtins.Promise.withResolvers πŸ“‹Firefox12/19/2023 Safari3/5/202477
webassembly.extended-constant-expressions πŸ“‹Firefox4/11/2023 Safari3/5/2024329

2024/2

API First Browser Date Last Browser Date Days Notes
api.HTMLTemplateElement.shadowRootMode πŸ“‹Safari3/27/2023 Firefox2/20/2024330
html.elements.template.shadowrootdelegatesfocus πŸ“‹Safari3/27/2023 Firefox2/20/2024330
html.elements.template.shadowrootmode πŸ“‹Safari3/27/2023 Firefox2/20/2024330

2024/1

API First Browser Date Last Browser Date Days Notes
api.HTMLVideoElement.disablePictureInPicture πŸ“‹Safari3/24/2020 Firefox1/23/20241400
Firefox: When this property is set to true, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox: This property is undefined, but still has an effect if set to a value.Firefox: When this property is set to true, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: When this property is set to true, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: This property is undefined, but still has an effect if set to a value.Firefox for Android: When this property is set to true, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.
css.properties.offset.auto πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.border-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.bottom πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.center πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.content-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.fill-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.left πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.normal πŸ“‹Safari9/18/2023 Firefox1/23/2024127
css.properties.offset.padding-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.right πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.stroke-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.top πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset.view-box πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-path.ray πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-path.url πŸ“‹Safari9/18/2023 Firefox1/23/2024127
css.properties.offset-position πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.auto πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.bottom πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.center πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.left πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.normal πŸ“‹Safari12/11/2023 Firefox1/23/202443
css.properties.offset-position.right πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.properties.offset-position.top πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.types.basic-shape.rect πŸ“‹Safari12/11/2023 Firefox1/23/202443
Chrome: Only supported on the offset-path property.Chrome Android: Only supported on the offset-path property.Edge: Only supported on the offset-path property.Opera: Only supported on the offset-path property.Opera Android: Only supported on the offset-path property.Samsung Internet: Only supported on the offset-path property.WebView Android: Only supported on the offset-path property.
css.types.basic-shape.xywh πŸ“‹Safari12/11/2023 Firefox1/23/202443
Chrome: Only supported on the offset-path property.Chrome Android: Only supported on the offset-path property.Edge: Only supported on the offset-path property.Opera: Only supported on the offset-path property.Opera Android: Only supported on the offset-path property.Samsung Internet: Only supported on the offset-path property.WebView Android: Only supported on the offset-path property.
css.types.ray πŸ“‹Safari9/12/2022 Firefox1/23/2024498
css.types.ray.position Safari12/11/2023 Firefox1/23/202443
css.types.ray.size Safari9/18/2023 Firefox1/23/2024127
html.elements.form.autocomplete.webauthn πŸ“‹Safari3/27/2023 Firefox1/23/2024302
html.elements.hr.hr_in_select Safari9/18/2023 Firefox1/23/2024127
Chrome: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> in the accessibility tree.Edge: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> in the accessibility tree.Firefox: Does not expose the <hr> in the accessibility tree.Opera: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> in the accessibility tree.Safari: Does not expose the <hr> in the accessibility tree.Safari on iOS: Does not expose the <hr> in the accessibility tree.WebView on iOS: Does not expose the <hr> in the accessibility tree.
html.elements.select.hr_in_select Safari9/18/2023 Firefox1/23/2024127
Chrome: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Chrome: Does not expose the <hr> in the accessibility tree.Edge: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Edge: Does not expose the <hr> in the accessibility tree.Firefox: Does not expose the <hr> in the accessibility tree.Opera: Exposes the <hr> visually in the page only when the menu is expanded (arrowing within the collapsed menu does not show them).Opera: Does not expose the <hr> in the accessibility tree.Safari: Does not expose the <hr> in the accessibility tree.Safari on iOS: Does not expose the <hr> in the accessibility tree.WebView on iOS: Does not expose the <hr> in the accessibility tree.
html.elements.video.disablepictureinpicture πŸ“‹Safari3/24/2020 Firefox1/23/20241400
Firefox: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.Firefox for Android: When this attribute is set, the overlay button to disable picture-in-picture (PiP) is hidden, but the user can still enable PiP.

2023/12

API First Browser Date Last Browser Date Days Notes
api.HTMLIFrameElement.loading πŸ“‹Safari3/27/2023 Firefox12/19/2023267
css.properties.text-indent.each-line πŸ“‹Safari9/20/2021 Firefox12/19/2023820
css.properties.text-indent.hanging πŸ“‹Safari9/20/2021 Firefox12/19/2023820
css.selectors.has πŸ“‹Safari3/14/2022 Firefox12/19/2023645
html.elements.iframe.loading πŸ“‹Safari3/27/2023 Firefox12/19/2023267
api.CanvasRenderingContext2D.reset πŸ“‹Firefox5/9/2023 Safari12/11/2023216
api.HTMLLinkElement.imageSizes πŸ“‹Firefox6/30/2020 Safari12/11/20231259
api.HTMLLinkElement.imageSrcset πŸ“‹Firefox6/30/2020 Safari12/11/20231259
api.HTMLMediaElement.preservesPitch πŸ“‹Firefox5/31/2022 Safari12/11/2023559
api.OffscreenCanvasRenderingContext2D.reset πŸ“‹Firefox5/9/2023 Safari12/11/2023216
api.SVGImageElement.crossOrigin πŸ“‹Firefox6/6/2023 Safari12/11/2023188
api.createImageBitmap.svgimageelement_as_source_image Firefox1/29/2019 Safari12/11/20231777
css.properties.counter-set πŸ“‹Firefox7/9/2019 Safari12/11/20231616
css.properties.counter-set.list-item πŸ“‹Firefox7/9/2019 Safari12/11/20231616
css.properties.counter-set.none πŸ“‹Firefox7/9/2019 Safari12/11/20231616
css.selectors.nesting πŸ“‹Firefox8/29/2023 Safari12/11/2023104
Chrome: Does not support nested rules that start with a type selector.Chrome Android: Does not support nested rules that start with a type selector.Edge: Does not support nested rules that start with a type selector.Opera: Does not support nested rules that start with a type selector.Opera Android: Does not support nested rules that start with a type selector.Safari: Does not support nested rules that start with a type selector.Safari on iOS: Does not support nested rules that start with a type selector.Samsung Internet: Does not support nested rules that start with a type selector.WebView Android: Does not support nested rules that start with a type selector.WebView on iOS: Does not support nested rules that start with a type selector.
css.types.easing-function.linear-function πŸ“‹Firefox4/11/2023 Safari12/11/2023244
css.types.length.cap Firefox2/8/2022 Safari12/11/2023671
css.types.mod.mixed_type_parameters πŸ“‹Firefox9/26/2023 Safari12/11/202376
css.types.rem.mixed_type_parameters πŸ“‹Firefox9/26/2023 Safari12/11/202376
css.types.round.mixed_type_parameters πŸ“‹Firefox9/26/2023 Safari12/11/202376
html.elements.link.imagesizes πŸ“‹Firefox6/30/2020 Safari12/11/20231259
html.elements.link.imagesrcset πŸ“‹Firefox6/30/2020 Safari12/11/20231259
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingIncrement_parameter Firefox8/1/2023 Safari12/11/2023132
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingMode_parameter Firefox8/1/2023 Safari12/11/2023132

2023/11

API First Browser Date Last Browser Date Days Notes
api.Navigator.userActivation πŸ“‹Safari3/27/2023 Firefox11/21/2023239
api.PublicKeyCredential.authenticatorAttachment πŸ“‹Safari5/16/2022 Firefox11/21/2023554
api.ToggleEvent πŸ“‹Safari9/18/2023 Firefox11/21/202364
api.ToggleEvent.ToggleEvent πŸ“‹Safari9/18/2023 Firefox11/21/202364
api.ToggleEvent.newState πŸ“‹Safari9/18/2023 Firefox11/21/202364
api.ToggleEvent.oldState πŸ“‹Safari9/18/2023 Firefox11/21/202364
api.UserActivation πŸ“‹Safari3/27/2023 Firefox11/21/2023239
api.UserActivation.hasBeenActive πŸ“‹Safari3/27/2023 Firefox11/21/2023239
api.UserActivation.isActive πŸ“‹Safari3/27/2023 Firefox11/21/2023239
css.properties.direction.vertical_slider_direction Safari5/18/2023 Firefox11/21/2023187
Firefox: Only supported for vertical range sliders.Firefox for Android: Only supported for vertical range sliders.Safari: Only supported for vertical range sliders.Safari on iOS: Only supported for vertical range sliders.WebView on iOS: Only supported for vertical range sliders.
css.types.length.lh πŸ“‹Safari3/27/2023 Firefox11/21/2023239
css.types.length.rlh πŸ“‹Safari3/27/2023 Firefox11/21/2023239
html.elements.input.type_range.vertical_orientation Safari5/18/2023 Firefox11/21/2023187
Chrome: Vertical orientation available via the writing-mode property (see Creating vertical controls).Chrome: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Chrome Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Chrome Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Edge: Vertical orientation available by setting the writing-mode: bt-lr style on the input element.Firefox: Vertical orientation available via the writing-mode property (see Creating vertical controls).Firefox: Supported using the non-standard orient="vertical" attribute.Firefox for Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Firefox for Android: Supported using the non-standard orient="vertical" attribute.Internet Explorer: Vertical orientation available by setting the writing-mode: bt-lr style on the input element.Quest Browser: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Opera: Vertical orientation available via the writing-mode property (see Creating vertical controls).Opera: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Opera Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).Opera Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Safari: Vertical orientation available via the writing-mode property (see Creating vertical controls).Safari: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Safari on iOS: Vertical orientation available via the writing-mode property (see Creating vertical controls).Safari on iOS: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.Samsung Internet: Vertical orientation available via the writing-mode property (see Creating vertical controls).Samsung Internet: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.WebView Android: Vertical orientation available via the writing-mode property (see Creating vertical controls).WebView Android: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.WebView on iOS: Vertical orientation available via the writing-mode property (see Creating vertical controls).WebView on iOS: Vertical orientation available by setting the non-standard -webkit-appearance: slider-vertical style on the input element. You shouldn't use this, since it's proprietary, unless you include appropriate fallbacks for users of other browsers.
http.headers.Link πŸ“‹Safari9/18/2023 Firefox11/21/202364
http.status.103 πŸ“‹Safari9/18/2023 Firefox11/21/202364
Chrome: Supported in HTTP/2 and later only.Chrome Android: Supported in HTTP/2 and later only.Edge: Supported in HTTP/2 and later only.Quest Browser: Supported in HTTP/2 and later only.Opera: Supported in HTTP/2 and later only.Opera Android: Supported in HTTP/2 and later only.Safari: Supported in HTTP/2 and later only.Safari on iOS: Supported in HTTP/2 and later only.Samsung Internet: Supported in HTTP/2 and later only.WebView Android: Supported in HTTP/2 and later only.WebView on iOS: Supported in HTTP/2 and later only.
http.status.103.preconnect Safari9/18/2023 Firefox11/21/202364

2023/10

API First Browser Date Last Browser Date Days Notes
api.AuthenticatorAttestationResponse.getAuthenticatorData πŸ“‹Safari9/12/2022 Firefox10/24/2023407
api.AuthenticatorAttestationResponse.getPublicKey πŸ“‹Safari9/12/2022 Firefox10/24/2023407
api.AuthenticatorAttestationResponse.getPublicKeyAlgorithm πŸ“‹Safari9/12/2022 Firefox10/24/2023407
api.AuthenticatorAttestationResponse.getTransports πŸ“‹Safari9/12/2022 Firefox10/24/2023407
api.Element.ariaAtomic πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaAutoComplete πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaBusy πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaChecked πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaColCount πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaColIndex πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaColSpan πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaCurrent πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaDisabled πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaExpanded πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaHasPopup πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaHidden πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaInvalid πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaKeyShortcuts πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaLabel πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaLevel πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaLive πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaModal πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaMultiLine πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaMultiSelectable πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaOrientation πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaPlaceholder πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaPosInSet πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaPressed πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaReadOnly πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRelevant Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRequired πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRoleDescription πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRowCount πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRowIndex πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaRowSpan πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaSelected πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaSetSize πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaSort πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaValueMax πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaValueMin πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaValueNow πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.ariaValueText πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.Element.role πŸ“‹Safari3/25/2019 Firefox10/24/20231674
api.ElementInternals.ariaAtomic πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaAutoComplete πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaBusy πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaChecked πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaColCount πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaColIndex πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaColSpan πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaCurrent πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaDisabled πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaExpanded πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaHasPopup πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaHidden πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaInvalid πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaKeyShortcuts πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaLabel πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaLevel πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaLive πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaModal πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaMultiLine πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaMultiSelectable πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaOrientation πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaPlaceholder πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaPosInSet πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaPressed πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaReadOnly πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRelevant Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRequired πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRoleDescription πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRowCount πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRowIndex πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaRowSpan πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaSelected πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaSetSize πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaSort πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaValueMax πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaValueMin πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaValueNow πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.ariaValueText πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.ElementInternals.role πŸ“‹Safari3/27/2023 Firefox10/24/2023211
api.PublicKeyCredential.isConditionalMediationAvailable_static πŸ“‹Safari9/12/2022 Firefox10/24/2023407
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_hkdf πŸ“‹Safari9/19/2017 Firefox10/24/20232226
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_pbkdf2 πŸ“‹Safari9/19/2017 Firefox10/24/20232226
javascript.builtins.String.isWellFormed πŸ“‹Safari3/27/2023 Firefox10/24/2023211
javascript.builtins.String.toWellFormed πŸ“‹Safari3/27/2023 Firefox10/24/2023211

2023/9

API First Browser Date Last Browser Date Days Notes
api.TextMetrics.emHeightAscent πŸ“‹Safari4/12/2018 Firefox9/26/20231993
api.TextMetrics.emHeightDescent πŸ“‹Safari4/12/2018 Firefox9/26/20231993
css.properties.font-size-adjust.from-font πŸ“‹Safari9/18/2023 Firefox9/26/20238
css.types.abs πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.exp πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.hypot πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.log πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.mod πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.pow πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.rem πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.round πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.sign πŸ“‹Safari3/14/2022 Firefox9/26/2023561
css.types.sqrt πŸ“‹Safari3/14/2022 Firefox9/26/2023561
html.elements.search πŸ“‹Safari9/18/2023 Firefox9/26/20238
api.CSSContainerRule.containerName πŸ“‹Firefox2/14/2023 Safari9/18/2023216
api.CSSContainerRule.containerQuery πŸ“‹Firefox2/14/2023 Safari9/18/2023216
api.CSSCounterStyleRule πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.additiveSymbols πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.fallback πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.name πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.negative πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.pad πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.prefix πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.range πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.speakAs πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.suffix πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.symbols πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSCounterStyleRule.system πŸ“‹Firefox10/14/2014 Safari9/18/20233261
api.CSSKeyframesRule.length πŸ“‹Firefox1/17/2023 Safari9/18/2023244
api.CanvasRenderingContext2D.drawImage.SVGImageElement_source_image Firefox9/28/2017 Safari9/18/20232181
api.CredentialsContainer.preventSilentAccess πŸ“‹Firefox5/9/2018 Safari9/18/20231958
Safari: This method exists, but always rejected with a NotSupportedError exception.Safari on iOS: This method exists, but always rejected with a NotSupportedError exception.WebView on iOS: This method exists, but always rejected with a NotSupportedError exception.
api.CustomElementRegistry.getName πŸ“‹Firefox8/1/2023 Safari9/18/202348
Safari: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.Safari on iOS: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.WebView on iOS: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.
api.DeviceMotionEvent πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceMotionEvent.acceleration πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceMotionEvent.accelerationIncludingGravity πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceMotionEvent.interval πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceMotionEvent.rotationRate πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceOrientationEvent πŸ“‹Firefox8/16/2011 Safari9/18/20234416
Chrome: Before version 50, Chrome provided absolute values instead of relative values for this event. Developers still needing absolute values may use the deviceorientationabsolute event.Chrome Android: Before version 50, Chrome Android provided absolute values instead of relative values for this event. Developers still needing absolute values may use the deviceorientationabsolute event.Firefox: Firefox 3.6, 4, and 5 supported mozOrientation instead of the standard DeviceOrientationEvent interface.Firefox for Android: Firefox for Android 4.6, 4, and 5 supported mozOrientation instead of the standard DeviceOrientationEvent interface.Quest Browser: Before version 5.0, Quest Browser provided absolute values instead of relative values for this event. Developers still needing absolute values may use the deviceorientationabsolute event.Samsung Internet: Before Samsung Internet 5.0, Samsung Internet provided absolute values instead of relative values for this event. Developers still needing absolute values may use the deviceorientationabsolute event.WebView Android: Before version 50, Chrome provided absolute values instead of relative values for this event. Developers still needing absolute values may use the deviceorientationabsolute event.
api.DeviceOrientationEvent.absolute πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceOrientationEvent.alpha πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceOrientationEvent.beta πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.DeviceOrientationEvent.gamma πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.Headers.getSetCookie πŸ“‹Firefox4/11/2023 Safari9/18/2023160
api.OffscreenCanvas.getContext.webgl2_context Firefox9/20/2022 Safari9/18/2023363
api.OffscreenCanvas.getContext.webgl_context Firefox9/20/2022 Safari9/18/2023363
api.Permissions.permission_push Firefox4/26/2016 Safari9/18/20232701
Firefox: Alias for the notifications permission (returns the same value).Firefox for Android: Alias for the notifications permission (returns the same value).
api.ReadableStreamDefaultReader.releaseLock.reject_pending_read_request Firefox6/28/2022 Safari9/18/2023447
Chrome: Before version 105, releaseLock() throws instead of rejecting.Chrome Android: Before version 105, releaseLock() throws instead of rejecting.Edge: Before version 105, releaseLock() throws instead of rejecting.Opera: Before version 91, releaseLock() throws instead of rejecting.Opera Android: Before version 72, releaseLock() throws instead of rejecting.Samsung Internet: Before version 20.0, releaseLock() throws instead of rejecting.WebView Android: Before version 105, releaseLock() throws instead of rejecting.
api.Response.json_static πŸ“‹Firefox7/4/2023 Safari9/18/202376
api.Selection.removeRange πŸ“‹Firefox11/9/2004 Safari9/18/20236887
api.StorageManager.estimate πŸ“‹Firefox11/14/2017 Safari9/18/20232134
api.URL.canParse_static πŸ“‹Firefox7/4/2023 Safari9/18/202376
api.URLSearchParams.delete.value_parameter Firefox7/4/2023 Safari9/18/202376
api.URLSearchParams.has.value_parameter Firefox7/4/2023 Safari9/18/202376
api.URLSearchParams.size πŸ“‹Firefox4/11/2023 Safari9/18/2023160
api.Window.devicemotion_event πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.Window.deviceorientation_event πŸ“‹Firefox8/16/2011 Safari9/18/20234416
api.createImageBitmap.options_premultiplyAlpha_parameter Firefox10/5/2021 Safari9/18/2023713
Safari: If the source image is an ImageData object, then the premultiplyAlpha option does nothing. See bug 237082.Safari on iOS: If the source image is an ImageData object, then the premultiplyAlpha option does nothing. See bug 237082.WebView on iOS: If the source image is an ImageData object, then the premultiplyAlpha option does nothing. See bug 237082.
css.at-rules.counter-style πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.additive-symbols πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.fallback πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.negative πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.pad πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.prefix πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.range πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.suffix πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.counter-style.symbols πŸ“‹Firefox10/14/2014 Safari9/18/20233261
Chrome: Does not support <image> as a value for the symbols descriptor.Chrome Android: Does not support <image> as a value for the symbols descriptor.Edge: Does not support <image> as a value for the symbols descriptor.Firefox: Does not support <image> as a value for the symbols descriptor.Firefox for Android: Does not support <image> as a value for the symbols descriptor.Quest Browser: Does not support <image> as a value for the symbols descriptor.Opera: Does not support <image> as a value for the symbols descriptor.Opera Android: Does not support <image> as a value for the symbols descriptor.Samsung Internet: Does not support <image> as a value for the symbols descriptor.WebView Android: Does not support <image> as a value for the symbols descriptor.
css.at-rules.counter-style.system πŸ“‹Firefox10/14/2014 Safari9/18/20233261
css.at-rules.font-face.size-adjust πŸ“‹Firefox9/7/2021 Safari9/18/2023741
css.at-rules.font-face.src.tech_keyword Firefox11/15/2022 Safari9/18/2023307
css.at-rules.media.overflow-block πŸ“‹Firefox3/19/2019 Safari9/18/20231644
css.at-rules.media.overflow-inline πŸ“‹Firefox3/19/2019 Safari9/18/20231644
css.at-rules.media.scripting πŸ“‹Firefox5/9/2023 Safari9/18/2023132
css.at-rules.media.update πŸ“‹Firefox6/28/2022 Safari9/18/2023447
css.at-rules.supports.font-format Firefox10/18/2022 Safari9/18/2023335
css.at-rules.supports.font-tech Firefox10/18/2022 Safari9/18/2023335
css.properties.background-image.image-set πŸ“‹Firefox6/1/2021 Safari9/18/2023839
Chrome: Support for url images only and x is the only supported resolution unit.Chrome Android: Support for url images only and x is the only supported resolution unit.Edge: Support for url images only and x is the only supported resolution unit.Firefox: The type() function is not supported as an argument to image-set().Firefox for Android: The type() function is not supported as an argument to image-set().Quest Browser: Support for url images only and x is the only supported resolution unit.Opera: Support for url images only and x is the only supported resolution unit.Opera Android: Support for url images only and x is the only supported resolution unit.Safari: The type() function is not supported as an argument to image-set().Safari: The type() function is not supported as an argument to image-set().Safari: Support for url images only and x is the only supported resolution unit.Safari: Support for url images only and x is the only supported resolution unit.Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: Support for url images only and x is the only supported resolution unit.Safari on iOS: Support for url images only and x is the only supported resolution unit.Samsung Internet: Support for url images only and x is the only supported resolution unit.WebView Android: Support for url images only and x is the only supported resolution unit.WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: Support for url images only and x is the only supported resolution unit.WebView on iOS: Support for url images only and x is the only supported resolution unit.
css.properties.contain-intrinsic-block-size πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-block-size.none πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-height πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-height.none πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-inline-size πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-inline-size.none πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-size πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-size.auto_none Firefox8/29/2023 Safari9/18/202320
css.properties.contain-intrinsic-size.none πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-width πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.contain-intrinsic-width.none πŸ“‹Firefox11/15/2022 Safari9/18/2023307
css.properties.content.image-set πŸ“‹Firefox6/1/2021 Safari9/18/2023839
Chrome: Support for url images only and x is the only supported resolution unit.Chrome Android: Support for url images only and x is the only supported resolution unit.Edge: Support for url images only and x is the only supported resolution unit.Firefox: The type() function is not supported as an argument to image-set().Firefox for Android: The type() function is not supported as an argument to image-set().Quest Browser: Support for url images only and x is the only supported resolution unit.Opera: Support for url images only and x is the only supported resolution unit.Opera Android: Support for url images only and x is the only supported resolution unit.Safari: The type() function is not supported as an argument to image-set().Safari: The type() function is not supported as an argument to image-set().Safari: Support for url images only and x is the only supported resolution unit.Safari: Support for url images only and x is the only supported resolution unit.Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: Support for url images only and x is the only supported resolution unit.Safari on iOS: Support for url images only and x is the only supported resolution unit.Samsung Internet: Support for url images only and x is the only supported resolution unit.WebView Android: Support for url images only and x is the only supported resolution unit.WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: Support for url images only and x is the only supported resolution unit.WebView on iOS: Support for url images only and x is the only supported resolution unit.
css.properties.font-size-adjust.two-values Firefox9/7/2021 Safari9/18/2023741
css.properties.hyphenate-character πŸ“‹Firefox3/8/2022 Safari9/18/2023559
css.properties.hyphens πŸ“‹Firefox12/15/2015 Safari9/18/20232834
Edge: Only works if the specified language is the same as the language of the underlying OS.Internet Explorer: Only works if the specified language is the same as the language of the underlying OS.
css.properties.list-style-type.ethiopic-halehame Firefox11/9/2004 Safari9/18/20236887
css.properties.list-style-type.ethiopic-halehame-am Firefox11/9/2004 Safari9/18/20236887
css.properties.text-transform.full-size-kana πŸ“‹Firefox12/11/2018 Safari9/18/20231742
css.properties.text-transform.full-width πŸ“‹Firefox2/19/2013 Safari9/18/20233863
css.selectors.only-child.no_parent_required Firefox3/7/2017 Safari9/18/20232386
css.types.image.image-set πŸ“‹Firefox6/1/2021 Safari9/18/2023839
Chrome: Support for url images only and x is the only supported resolution unit.Chrome Android: Support for url images only and x is the only supported resolution unit.Edge: Support for url images only and x is the only supported resolution unit.Firefox: The type() function is not supported as an argument to image-set().Firefox for Android: The type() function is not supported as an argument to image-set().Quest Browser: Support for url images only and x is the only supported resolution unit.Opera: Support for url images only and x is the only supported resolution unit.Opera Android: Support for url images only and x is the only supported resolution unit.Safari: The type() function is not supported as an argument to image-set().Safari: The type() function is not supported as an argument to image-set().Safari: Support for url images only and x is the only supported resolution unit.Safari: Support for url images only and x is the only supported resolution unit.Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: The type() function is not supported as an argument to image-set().Safari on iOS: Support for url images only and x is the only supported resolution unit.Safari on iOS: Support for url images only and x is the only supported resolution unit.Samsung Internet: Support for url images only and x is the only supported resolution unit.WebView Android: Support for url images only and x is the only supported resolution unit.WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: The type() function is not supported as an argument to image-set().WebView on iOS: Support for url images only and x is the only supported resolution unit.WebView on iOS: Support for url images only and x is the only supported resolution unit.
html.elements.iframe.sandbox.allow-downloads πŸ“‹Firefox10/20/2020 Safari9/18/20231063
html.elements.link.rel.modulepreload πŸ“‹Firefox7/4/2023 Safari9/18/202376
html.elements.link.rel.modulepreload.as-script πŸ“‹Firefox7/4/2023 Safari9/18/202376
http.headers.Alt-Svc πŸ“‹Firefox5/12/2015 Safari9/18/20233051
Firefox: Only supports draft-04Firefox for Android: Only supports draft-04
http.headers.Clear-Site-Data πŸ“‹Firefox10/23/2018 Safari9/18/20231791
http.headers.Clear-Site-Data.cookies πŸ“‹Firefox10/23/2018 Safari9/18/20231791
http.headers.Clear-Site-Data.secure_context_required Firefox10/23/2018 Safari9/18/20231791
http.headers.Clear-Site-Data.storage πŸ“‹Firefox10/23/2018 Safari9/18/20231791
http.headers.Clear-Site-Data.wildcard πŸ“‹Firefox10/23/2018 Safari9/18/20231791
javascript.builtins.AggregateError.serializable_object Firefox7/26/2022 Safari9/18/2023419
Chrome: AggregateError serializes to the Error type, without additional properties.Chrome Android: AggregateError serializes to the Error type, without additional properties.Edge: AggregateError serializes to the Error type, without additional properties.Firefox: AggregateError serializes to the AggregateError type, with properties name, message, cause, and errors.Firefox for Android: AggregateError serializes to the AggregateError type, with properties name, message, cause, and errors.Quest Browser: AggregateError serializes to the Error type, without additional properties.Opera: AggregateError serializes to the Error type, without additional properties.Opera Android: AggregateError serializes to the Error type, without additional properties.Samsung Internet: AggregateError serializes to the Error type, without additional properties.WebView Android: AggregateError serializes to the Error type, without additional properties.
javascript.builtins.Function.toString.toString_revision Firefox6/13/2017 Safari9/18/20232288
javascript.builtins.RegExp.unicodeSets πŸ“‹Firefox8/1/2023 Safari9/18/202348

2023/8

API First Browser Date Last Browser Date Days Notes
api.CSSStyleRule.cssRules πŸ“‹Safari5/18/2023 Firefox8/29/2023103
api.CSSStyleRule.deleteRule πŸ“‹Safari5/18/2023 Firefox8/29/2023103
api.CSSStyleRule.insertRule πŸ“‹Safari5/18/2023 Firefox8/29/2023103
api.CanvasRenderingContext2D.getContextAttributes πŸ“‹Safari9/20/2021 Firefox8/29/2023708
api.DedicatedWorkerGlobalScope.rtctransform_event πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedAudioFrame πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedAudioFrame.data πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedAudioFrame.getMetadata πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedAudioFrame.timestamp Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedVideoFrame πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedVideoFrame.data πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedVideoFrame.getMetadata πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedVideoFrame.timestamp Safari3/14/2022 Firefox8/29/2023533
api.RTCEncodedVideoFrame.type πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpReceiver.transform πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransform πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransform.RTCRtpScriptTransform πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer.generateKeyFrame πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer.options πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer.readable πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer.sendKeyFrameRequest πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpScriptTransformer.writable πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCRtpSender.transform πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCTransformEvent πŸ“‹Safari3/14/2022 Firefox8/29/2023533
api.RTCTransformEvent.transformer πŸ“‹Safari3/14/2022 Firefox8/29/2023533
css.properties.math-style πŸ“‹Safari4/26/2021 Firefox8/29/2023855
css.properties.math-style.compact πŸ“‹Safari4/26/2021 Firefox8/29/2023855
css.properties.math-style.normal πŸ“‹Safari4/26/2021 Firefox8/29/2023855
http.headers.Range.cors_safe Safari9/12/2022 Firefox8/29/2023351
api.HTMLInputElement.dirName πŸ“‹Safari7/25/2012 Firefox8/1/20234024
api.HTMLTextAreaElement.dirName πŸ“‹Safari7/25/2012 Firefox8/1/20234024
api.MediaDevices.enumerateDevices πŸ“‹Safari9/19/2017 Firefox8/1/20232142
Firefox: enumerateDevices() enumerates both input and output devices. Previously only input devices were returned.Firefox: enumerateDevices() only returns input devices.Firefox for Android: enumerateDevices() enumerates both input and output devices. Previously only input devices were returned.Firefox for Android: enumerateDevices() only returns input devices.
api.TextMetrics.alphabeticBaseline πŸ“‹Safari4/12/2018 Firefox8/1/20231937
api.TextMetrics.fontBoundingBoxAscent πŸ“‹Safari4/12/2018 Firefox8/1/20231937
api.TextMetrics.fontBoundingBoxDescent πŸ“‹Safari4/12/2018 Firefox8/1/20231937
api.TextMetrics.hangingBaseline πŸ“‹Safari4/12/2018 Firefox8/1/20231937
api.TextMetrics.ideographicBaseline πŸ“‹Safari4/12/2018 Firefox8/1/20231937
css.selectors.first πŸ“‹Safari7/25/2012 Firefox8/1/20234024
html.elements.input.dirname πŸ“‹Safari7/25/2012 Firefox8/1/20234024
html.elements.textarea.dirname πŸ“‹Safari7/25/2012 Firefox8/1/20234024
http.headers.Content-Security-Policy.script-src.external_scripts πŸ“‹Safari7/20/2022 Firefox8/1/2023377
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingIncrement_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingMode_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingPriority_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter.negative Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_trailingZeroDisplay_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter.string_values Safari3/27/2023 Firefox8/1/2023127
javascript.builtins.Intl.NumberFormat.format.number_parameter-string_decimal Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.formatRange πŸ“‹Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.NumberFormat.formatRangeToParts πŸ“‹Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingPriority_parameter Safari3/14/2022 Firefox8/1/2023505
javascript.builtins.Intl.PluralRules.selectRange πŸ“‹Safari3/14/2022 Firefox8/1/2023505

2023/7

API First Browser Date Last Browser Date Days Notes
css.properties.animation-composition πŸ“‹Safari9/12/2022 Firefox7/4/2023295
css.properties.animation-composition.accumulate πŸ“‹Safari9/12/2022 Firefox7/4/2023295
css.properties.animation-composition.add πŸ“‹Safari9/12/2022 Firefox7/4/2023295
css.properties.animation-composition.replace πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.Array.fromAsync πŸ“‹Safari3/27/2023 Firefox7/4/202399
javascript.builtins.Array.toReversed πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.Array.toSorted πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.Array.toSpliced πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.Array.with πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.TypedArray.toReversed πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.TypedArray.toSorted πŸ“‹Safari9/12/2022 Firefox7/4/2023295
javascript.builtins.TypedArray.with πŸ“‹Safari9/12/2022 Firefox7/4/2023295

2023/6

API First Browser Date Last Browser Date Days Notes
api.SharedWorker.SharedWorker.ecmascript_modules Safari9/20/2021 Firefox6/6/2023624
Safari: Nested workers support was introduced in Safari 15.5.Safari: Script loading in nested workers was introduced in Safari 16.4.Safari on iOS: Nested workers support was introduced in Safari on iOS 15.5.Safari on iOS: Script loading in nested workers was introduced in Safari on iOS 16.4.WebView on iOS: Nested workers support was introduced in WebView on iOS 15.5.WebView on iOS: Script loading in nested workers was introduced in WebView on iOS 16.4.
api.SharedWorker.SharedWorker.options_type_parameter Safari9/20/2021 Firefox6/6/2023624
api.Worker.Worker.ecmascript_modules Safari9/20/2021 Firefox6/6/2023624
Node.js: ECMAScript modules are enabled for files ending with .mjs and for files ending with .js when the nearest parent package.json file contains a top-level field "type" with a value of "module".Safari: Nested workers support was introduced in Safari 15.5.Safari: Script loading in nested workers was introduced in Safari 16.4.Safari on iOS: Nested workers support was introduced in Safari on iOS 15.5.Safari on iOS: Script loading in nested workers was introduced in Safari on iOS 16.4.WebView on iOS: Nested workers support was introduced in WebView on iOS 15.5.WebView on iOS: Script loading in nested workers was introduced in WebView on iOS 16.4.
api.Worker.Worker.options_type_parameter Safari9/20/2021 Firefox6/6/2023624
Deno: Only supports module
api.Worklet.ecmascript_modules Safari9/20/2021 Firefox6/6/2023624
Safari: Nested workers support was introduced in Safari 15.5.Safari: Script loading in nested workers was introduced in Safari 16.4.Safari on iOS: Nested workers support was introduced in Safari on iOS 15.5.Safari on iOS: Script loading in nested workers was introduced in Safari on iOS 16.4.WebView on iOS: Nested workers support was introduced in WebView on iOS 15.5.WebView on iOS: Script loading in nested workers was introduced in WebView on iOS 16.4.
css.at-rules.media.inverted-colors πŸ“‹Safari3/21/2016 Firefox6/6/20232633
css.properties.-webkit-text-security Safari10/26/2007 Firefox6/6/20235702
css.selectors.lang.argument_list Safari9/30/2015 Firefox6/6/20232806
css.selectors.lang.wildcards Safari9/30/2015 Firefox6/6/20232806
css.types.calc-keyword.NaN Safari9/12/2022 Firefox6/6/2023267
css.types.calc-keyword.infinity Safari9/12/2022 Firefox6/6/2023267
javascript.operators.import.worker_support Safari9/20/2021 Firefox6/6/2023624
javascript.statements.import.worker_support Safari9/20/2021 Firefox6/6/2023624

2023/5

API First Browser Date Last Browser Date Days Notes
css.selectors.user-invalid πŸ“‹Firefox4/19/2021 Safari5/18/2023759
css.selectors.user-valid πŸ“‹Firefox4/19/2021 Safari5/18/2023759
css.types.color.system-color.accentcolor_accentcolortext πŸ“‹Firefox7/26/2022 Safari5/18/2023296
Safari: Only supports a fallback: The native color when accent colour (in macOS' appearance panel) is set to 'multicolour'. On iOS falls back to the blue accent colourSafari on iOS: Only supports a fallback: The native color when accent colour (in macOS' appearance panel) is set to 'multicolour'. On iOS falls back to the blue accent colourWebView on iOS: Only supports a fallback: The native color when accent colour (in macOS' appearance panel) is set to 'multicolour'. On iOS falls back to the blue accent colour
api.CompressionStream πŸ“‹Safari3/27/2023 Firefox5/9/202343
Node.js: Available as a part of the stream/web module.
api.CompressionStream.CompressionStream πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.CompressionStream.CompressionStream.deflate πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.CompressionStream.CompressionStream.deflate-raw πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.CompressionStream.CompressionStream.gzip πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.CompressionStream.readable πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.CompressionStream.writable πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream πŸ“‹Safari3/27/2023 Firefox5/9/202343
Node.js: Available as a part of the stream/web module.
api.DecompressionStream.DecompressionStream πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream.DecompressionStream.deflate πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream.DecompressionStream.deflate-raw πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream.DecompressionStream.gzip πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream.readable πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.DecompressionStream.writable πŸ“‹Safari3/27/2023 Firefox5/9/202343
api.RTCPeerConnection.connectionState πŸ“‹Safari9/19/2017 Firefox5/9/20232058
api.RTCPeerConnection.connectionstatechange_event πŸ“‹Safari9/19/2017 Firefox5/9/20232058
api.RTCPeerConnection.sctp πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCRtpReceiver.getCapabilities_static πŸ“‹Safari3/25/2019 Firefox5/9/20231506
api.RTCRtpSender.getCapabilities_static πŸ“‹Safari3/25/2019 Firefox5/9/20231506
api.RTCRtpSender.setStreams πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCSctpTransport πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCSctpTransport.maxChannels πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCSctpTransport.maxMessageSize πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCSctpTransport.state πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCSctpTransport.statechange_event Safari3/14/2022 Firefox5/9/2023421
api.RTCSctpTransport.transport πŸ“‹Safari3/14/2022 Firefox5/9/2023421
api.RTCStatsReport.type_media-source πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_media-source.id πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_media-source.kind πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_media-source.timestamp πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_media-source.trackIdentifier πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_media-source.type πŸ“‹Safari4/26/2021 Firefox5/9/2023743
api.RTCStatsReport.type_peer-connection πŸ“‹Safari3/24/2020 Firefox5/9/20231141
api.RTCStatsReport.type_peer-connection.dataChannelsClosed πŸ“‹Safari3/24/2020 Firefox5/9/20231141
api.RTCStatsReport.type_peer-connection.dataChannelsOpened πŸ“‹Safari3/24/2020 Firefox5/9/20231141
api.RTCStatsReport.type_peer-connection.id πŸ“‹Safari3/24/2020 Firefox5/9/20231141
api.RTCStatsReport.type_peer-connection.timestamp πŸ“‹Safari3/24/2020 Firefox5/9/20231141
api.RTCStatsReport.type_peer-connection.type πŸ“‹Safari3/24/2020 Firefox5/9/20231141
css.properties.content.gradient πŸ“‹Safari10/22/2013 Firefox5/9/20233486
Firefox: content: <gradient> doesn't paint on ::before/::after pseudo elements. See bug 1832901.Firefox for Android: content: <gradient> doesn't paint on ::before/::after pseudo elements. See bug 1832901.
css.selectors.nth-child.of_syntax Safari9/30/2015 Firefox5/9/20232778
css.selectors.nth-last-child.of_syntax Safari9/30/2015 Firefox5/9/20232778
css.types.color.color πŸ“‹Safari9/20/2021 Firefox5/9/2023596
Safari: Only supports display-p3 and srgb predefined color profiles.Safari on iOS: Only supports display-p3 and srgb predefined color profiles.WebView on iOS: Only supports display-p3 and srgb predefined color profiles.
css.types.color.color.mixed_type_parameters Safari9/20/2021 Firefox5/9/2023596
css.types.color.color-mix πŸ“‹Safari12/13/2022 Firefox5/9/2023147
css.types.color.lab πŸ“‹Safari9/20/2021 Firefox5/9/2023596
css.types.color.lab.mixed_type_parameters Safari12/13/2022 Firefox5/9/2023147
css.types.color.lch πŸ“‹Safari9/20/2021 Firefox5/9/2023596
css.types.color.lch.mixed_type_parameters Safari12/13/2022 Firefox5/9/2023147
css.types.color.oklab πŸ“‹Safari3/14/2022 Firefox5/9/2023421
css.types.color.oklab.mixed_type_parameters Safari12/13/2022 Firefox5/9/2023147
css.types.color.oklch πŸ“‹Safari3/14/2022 Firefox5/9/2023421
css.types.color.oklch.mixed_type_parameters Safari12/13/2022 Firefox5/9/2023147

2023/4

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.createConicGradient πŸ“‹Safari10/24/2022 Firefox4/11/2023169
Firefox: Implements an older version of the specification. The gradient starts from a line going vertically up from the center, like the equivalent CSS function.Firefox for Android: Implements an older version of the specification. The gradient starts from a line going vertically up from the center, like the equivalent CSS function.Safari: Implements an older version of the specification. The gradient starts from a line going vertically up from the center, like the equivalent CSS function.Safari on iOS: Implements an older version of the specification. The gradient starts from a line going vertically up from the center, like the equivalent CSS function.WebView on iOS: Implements an older version of the specification. The gradient starts from a line going vertically up from the center, like the equivalent CSS function.
api.CanvasRenderingContext2D.roundRect πŸ“‹Safari9/12/2022 Firefox4/11/2023211
api.HTMLElement.inert πŸ“‹Safari5/16/2022 Firefox4/11/2023330
api.OffscreenCanvasRenderingContext2D.roundRect πŸ“‹Safari3/27/2023 Firefox4/11/202315
api.Path2D.roundRect πŸ“‹Safari9/12/2022 Firefox4/11/2023211
css.types.overflow.overlay Safari9/17/2018 Firefox4/11/20231667
Chrome: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.Chrome Android: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.Edge: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.Quest Browser: Before version false, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version false, the keyword aliases to the standard auto keyword. See bug 40444262.Opera: Before version 100, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 100, the keyword aliases to the standard auto keyword. See bug 40444262.Safari: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.Safari on iOS: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.WebView Android: Before version 114, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 114, the keyword aliases to the standard auto keyword. See bug 40444262.WebView on iOS: Before version 12, the overlay keyword caused non-standard behavior, allowing scrollbars to overlay content without taking up layout space. From version 12, the keyword aliases to the standard auto keyword. See bug 189811.
html.global_attributes.inert πŸ“‹Safari5/16/2022 Firefox4/11/2023330

2023/3

API First Browser Date Last Browser Date Days Notes
api.CSSStyleSheet.CSSStyleSheet πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.CSSStyleSheet.CSSStyleSheet.options_baseURL_parameter πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.CSSStyleSheet.replace πŸ“‹Firefox5/31/2022 Safari3/27/2023300
Firefox: Before Firefox 121, when calling replace() repeatedly, the style is applied, but the change is not reflected in the CSS Object Model. See bug 1864815.Firefox for Android: Before Firefox for Android 121, when calling replace() repeatedly, the style is applied, but the change is not reflected in the CSS Object Model. See bug 1864815.
api.CSSStyleSheet.replaceSync πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.DedicatedWorkerGlobalScope.cancelAnimationFrame πŸ“‹Firefox4/5/2022 Safari3/27/2023356
api.DedicatedWorkerGlobalScope.messageerror_event πŸ“‹Firefox11/14/2017 Safari3/27/20231959
api.DedicatedWorkerGlobalScope.requestAnimationFrame πŸ“‹Firefox4/5/2022 Safari3/27/2023356
Chrome: Not supported in nested Web Workers. See bug 41483010.Chrome Android: Not supported in nested Web Workers. See bug 41483010.Edge: Not supported in nested Web Workers. See bug 41483010.Quest Browser: Not supported in nested Web Workers. See bug 41483010.Opera: Not supported in nested Web Workers. See bug 41483010.Opera Android: Not supported in nested Web Workers. See bug 41483010.Samsung Internet: Not supported in nested Web Workers. See bug 41483010.
api.Document.adoptedStyleSheets πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.Document.adoptedStyleSheets.mutable πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.Document.exitFullscreen πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Document.exitFullscreen.returns_promise Firefox12/11/2018 Safari3/27/20231567
api.Document.fullscreen πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Document.fullscreenElement πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.
api.Document.fullscreenEnabled πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Document.fullscreenchange_event πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Document.fullscreenerror_event πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Element.fullscreenchange_event πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Element.fullscreenerror_event πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.
api.Element.requestFullscreen πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Firefox: Before Firefox 44, Firefox incorrectly allowed elements inside a <frame> or <object> element to request, and to be granted, fullscreen. In Firefox 44 and onwards this has been fixed: only elements in the top-level document or in an <iframe> element with the allowfullscreen attribute can be displayed fullscreen.Firefox for Android: Before Firefox for Android 44, Firefox for Android incorrectly allowed elements inside a <frame> or <object> element to request, and to be granted, fullscreen. In Firefox for Android 44 and onwards this has been fixed: only elements in the top-level document or in an <iframe> element with the allowfullscreen attribute can be displayed fullscreen.Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone. Shows an overlay button which can not be disabled.
api.Element.requestFullscreen.returns_promise Firefox12/11/2018 Safari3/27/20231567
api.ElementInternals πŸ“‹Firefox10/5/2021 Safari3/27/2023538
api.ElementInternals.checkValidity πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.form πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.labels πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.reportValidity πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.setFormValue πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.setValidity πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.shadowRoot πŸ“‹Firefox10/5/2021 Safari3/27/2023538
api.ElementInternals.validationMessage πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.validity πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.ElementInternals.willValidate πŸ“‹Firefox3/8/2022 Safari3/27/2023384
api.FileSystemDirectoryHandle.@@asyncIterator πŸ“‹Firefox3/14/2023 Safari3/27/202313
api.FileSystemSyncAccessHandle.close.sync_version Firefox3/14/2023 Safari3/27/202313
api.FileSystemSyncAccessHandle.flush.sync_version Firefox3/14/2023 Safari3/27/202313
api.FileSystemSyncAccessHandle.getSize.sync_version Firefox3/14/2023 Safari3/27/202313
api.FileSystemSyncAccessHandle.truncate.sync_version Firefox3/14/2023 Safari3/27/202313
api.FormData.FormData.submitter Firefox3/14/2023 Safari3/27/202313
api.GamepadHapticActuator πŸ“‹Firefox8/8/2017 Safari3/27/20232057
api.GamepadHapticActuator.type Firefox8/8/2017 Safari3/27/20232057
api.HTMLCanvasElement.transferControlToOffscreen πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.HTMLElement.attachInternals πŸ“‹Firefox10/5/2021 Safari3/27/2023538
api.HTMLInputElement.cancel_event πŸ“‹Firefox8/10/2021 Safari3/27/2023594
api.HTMLSlotElement.assign πŸ“‹Firefox9/7/2021 Safari3/27/2023566
Chrome: Before Chrome 95, the method accepted any Node instead of just Element and Text.Chrome: Accepted sequence<Node> instead of (Element or Text)....Chrome Android: Before Chrome Android 95, the method accepted any Node instead of just Element and Text.Chrome Android: Accepted sequence<Node> instead of (Element or Text)....Edge: Before Edge 95, the method accepted any Node instead of just Element and Text.Edge: Accepted sequence<Node> instead of (Element or Text)....Quest Browser: Before Quest Browser 18.0, the method accepted any Node instead of just Element and Text.Quest Browser: Accepted sequence<Node> instead of (Element or Text)....Opera: Before Opera 81, the method accepted any Node instead of just Element and Text.Opera: Accepted sequence<Node> instead of (Element or Text)....Opera Android: Before Opera Android 67, the method accepted any Node instead of just Element and Text.Opera Android: Accepted sequence<Node> instead of (Element or Text)....Samsung Internet: Before Samsung Internet 17.0, the method accepted any Node instead of just Element and Text.Samsung Internet: Accepted sequence<Node> instead of (Element or Text)....WebView Android: Before WebView Android 95, the method accepted any Node instead of just Element and Text.WebView Android: Accepted sequence<Node> instead of (Element or Text)....
api.InputEvent.isComposing πŸ“‹Firefox7/22/2014 Safari3/27/20233170
api.KeyframeEffect.iterationComposite πŸ“‹Firefox8/25/2020 Safari3/27/2023944
api.MessagePort.messageerror_event πŸ“‹Firefox11/14/2017 Safari3/27/20231959
Node.js: Supports the event, but only via Node EventEmitter.Node.js: Supports the event, but only via Node EventEmitter.
api.Navigator.pdfViewerEnabled πŸ“‹Firefox4/5/2022 Safari3/27/2023356
api.OffscreenCanvas πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.OffscreenCanvas πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.convertToBlob πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.getContext πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.getContext.2d_context Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.getContext.bitmaprenderer_context Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.height πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.transferToImageBitmap πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvas.width πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.arc πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.arcTo πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.beginPath πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.bezierCurveTo πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.canvas πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.clearRect πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.clip πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.closePath πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.createConicGradient πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.createImageData πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.createLinearGradient πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.createPattern πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.createRadialGradient πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.direction πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.drawImage πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.ellipse πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.fill πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.fillRect πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.fillStyle πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.fillText πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.getImageData πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.getLineDash πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.getTransform πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.globalAlpha πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.globalCompositeOperation πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.imageSmoothingEnabled πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.isPointInPath πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.isPointInStroke πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.lineCap πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.lineDashOffset πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.lineJoin πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.lineTo πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.lineWidth πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.measureText πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.miterLimit πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.moveTo πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.putImageData πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.quadraticCurveTo πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.rect πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.resetTransform πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.restore πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.rotate πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.save πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.scale πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.setLineDash πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.setTransform πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.shadowBlur πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.shadowColor πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.shadowOffsetX πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.shadowOffsetY πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.stroke πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.strokeRect πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.strokeStyle πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.strokeText πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.textAlign πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.textBaseline πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.transform πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.OffscreenCanvasRenderingContext2D.translate πŸ“‹Firefox9/20/2022 Safari3/27/2023188
api.PerformanceResourceTiming.decodedBodySize πŸ“‹Firefox3/8/2016 Safari3/27/20232575
api.PerformanceResourceTiming.encodedBodySize πŸ“‹Firefox3/8/2016 Safari3/27/20232575
api.PerformanceResourceTiming.serverTiming πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PerformanceResourceTiming.transferSize πŸ“‹Firefox3/8/2016 Safari3/27/20232575
api.PerformanceServerTiming πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PerformanceServerTiming.description πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PerformanceServerTiming.duration πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PerformanceServerTiming.name πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PerformanceServerTiming.toJSON πŸ“‹Firefox6/26/2018 Safari3/27/20231735
api.PermissionStatus.change_event πŸ“‹Firefox4/26/2016 Safari3/27/20232526
Safari: The onchange event handler is supported, but the event never fires. See bug 259432.Safari on iOS: The onchange event handler is supported, but the event never fires. See bug 259432.WebView on iOS: The onchange event handler is supported, but the event never fires. See bug 259432.
api.Permissions.permission_notifications Firefox4/26/2016 Safari3/27/20232526
Firefox: Alias for the push permission (returns the same value).Firefox for Android: Alias for the push permission (returns the same value).
api.RTCStatsReport.type_inbound-rtp.trackIdentifier πŸ“‹Firefox3/14/2023 Safari3/27/202313
api.Report πŸ“‹Firefox1/29/2019 Safari3/27/20231518
Firefox: Worker support added in version 77
api.Report.body πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.Report.toJSON Firefox6/2/2020 Safari3/27/20231028
api.Report.type πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.Report.url πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportBody πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportBody.toJSON Firefox6/2/2020 Safari3/27/20231028
api.ReportingObserver πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportingObserver.ReportingObserver πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportingObserver.disconnect πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportingObserver.observe πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.ReportingObserver.takeRecords πŸ“‹Firefox1/29/2019 Safari3/27/20231518
api.SVGStyleElement.sheet πŸ“‹Firefox11/29/2005 Safari3/27/20236327
api.Screen.orientation πŸ“‹Firefox12/15/2015 Safari3/27/20232659
Edge: Edge does not return an Orientation object; instead, it returns the orientation type as a string.Internet Explorer: Not supported on Windows 7.
api.ScreenOrientation πŸ“‹Firefox12/15/2015 Safari3/27/20232659
api.ScreenOrientation.angle πŸ“‹Firefox12/15/2015 Safari3/27/20232659
api.ScreenOrientation.change_event πŸ“‹Firefox12/15/2015 Safari3/27/20232659
api.ScreenOrientation.type πŸ“‹Firefox12/15/2015 Safari3/27/20232659
api.ServiceWorkerContainer.messageerror_event πŸ“‹Firefox1/29/2019 Safari3/27/20231518
Safari: Although the onmessageerror event handler property is supported, the messageerror event is never fired.Safari on iOS: Although the onmessageerror event handler property is supported, the messageerror event is never fired.
api.ShadowRoot.adoptedStyleSheets πŸ“‹Firefox5/31/2022 Safari3/27/2023300
api.ShadowRoot.fullscreenElement πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.
api.ShadowRoot.slotAssignment πŸ“‹Firefox9/7/2021 Safari3/27/2023566
api.Window.messageerror_event πŸ“‹Firefox11/14/2017 Safari3/27/20231959
api.Worker.messageerror_event πŸ“‹Firefox11/14/2017 Safari3/27/20231959
Node.js: Supports the event, but only via Node EventEmitter.Node.js: Supports the event, but only via Node EventEmitter.
api.Worker.worker_support Firefox12/1/2014 Safari3/27/20233038
Chrome: Not available in Shared Workers. See bug 40695450.Chrome Android: Not available in Shared Workers. See bug 40695450.Edge: Not available in Shared Workers. See bug 40695450.Quest Browser: Not available in Shared Workers. See bug 40695450.Opera: Not available in Shared Workers. See bug 40695450.Opera Android: Not available in Shared Workers. See bug 40695450.Safari: Not available in Shared Workers. See bug 265263.Safari on iOS: Not available in Shared Workers. See bug 265263.Samsung Internet: Not available in Shared Workers. See bug 40695450.WebView Android: Not available in Shared Workers. See bug 40695450.WebView on iOS: Not available in Shared Workers. See bug 265263.
api.WritableStreamDefaultController.signal πŸ“‹Firefox5/3/2022 Safari3/27/2023328
css.at-rules.media.or_syntax Firefox12/11/2018 Safari3/27/20231567
css.at-rules.media.range_syntax Firefox6/28/2022 Safari3/27/2023272
Firefox: Only supports range notations where the feature name comes before any value (width > 500px)Firefox for Android: Only supports range notations where the feature name comes before any value (width > 500px)
css.at-rules.media.scan πŸ“‹Firefox10/23/2018 Safari3/27/20231616
css.properties.font-size.xxx-large Firefox10/22/2019 Safari3/27/20231252
css.properties.font-size-adjust πŸ“‹Firefox6/17/2008 Safari3/27/20235396
Firefox: Before Firefox 40, font-size-adjust: 0 was incorrectly interpreted as font-size-adjust: none (bug 1144885).Firefox: Only supported on Windows.Firefox for Android: Before Firefox for Android 40, font-size-adjust: 0 was incorrectly interpreted as font-size-adjust: none (bug 1144885).
css.properties.font-size-adjust.none πŸ“‹Firefox6/17/2008 Safari3/27/20235396
css.properties.font-synthesis-small-caps πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-small-caps.auto πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-small-caps.none πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-style πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-style.auto πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-style.none πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-weight πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-weight.auto πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.font-synthesis-weight.none πŸ“‹Firefox3/14/2023 Safari3/27/202313
css.properties.outline πŸ“‹Firefox4/19/2021 Safari3/27/2023707
Chrome: Before Chrome 94, outline does not follow the shape of border-radius.Chrome Android: Before Chrome Android 94, outline does not follow the shape of border-radius.Edge: Before Edge 94, outline does not follow the shape of border-radius.Firefox: Before Firefox 88, outline does not follow the shape of border-radius.Firefox for Android: Before Firefox for Android 88, outline does not follow the shape of border-radius.Quest Browser: Before Quest Browser 18.0, outline does not follow the shape of border-radius.Opera: Before Opera 80, outline does not follow the shape of border-radius.Safari: Before Safari 16.4, outline does not follow the shape of border-radius. See bug 20807.Safari on iOS: Before Safari on iOS 16.4, outline does not follow the shape of border-radius. See bug 20807.WebView Android: Before Chrome 94, outline does not follow the shape of border-radius.WebView on iOS: Before WebView on iOS 16.4, outline does not follow the shape of border-radius. See bug 20807.
css.selectors.backdrop.fullscreen Firefox6/7/2016 Safari3/27/20232484
css.selectors.dir πŸ“‹Firefox9/20/2016 Safari3/27/20232379
css.selectors.fullscreen πŸ“‹Firefox12/11/2018 Safari3/27/20231567
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.Safari on iOS: Only available on iPad, not on iPhone.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.
html.elements.script.type.importmap πŸ“‹Firefox12/13/2022 Safari3/27/2023104
http.headers.Sec-Fetch-Dest πŸ“‹Firefox7/13/2021 Safari3/27/2023622
http.headers.Sec-Fetch-Mode πŸ“‹Firefox7/13/2021 Safari3/27/2023622
http.headers.Sec-Fetch-Site πŸ“‹Firefox7/13/2021 Safari3/27/2023622
http.headers.Server-Timing πŸ“‹Firefox6/26/2018 Safari3/27/20231735
javascript.classes.static.initialization_blocks πŸ“‹Firefox10/5/2021 Safari3/27/2023538
javascript.operators.import_meta.resolve πŸ“‹Firefox10/18/2022 Safari3/27/2023160
Node.js: Returns a URL object instead of a string.
javascript.regular_expressions.lookbehind_assertion πŸ“‹Firefox6/30/2020 Safari3/27/20231000
webassembly.fixed-width-SIMD πŸ“‹Firefox6/1/2021 Safari3/27/2023664
api.FileSystemDirectoryHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.entries πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.getDirectoryHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.getFileHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.keys πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.removeEntry πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.resolve πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemDirectoryHandle.values πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemFileHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemFileHandle.createSyncAccessHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemFileHandle.getFile πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemHandle.isSameEntry πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemHandle.kind πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemHandle.move Safari12/13/2021 Firefox3/14/2023456
api.FileSystemHandle.name πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.close πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.flush πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.getSize πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.read πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.truncate πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.FileSystemSyncAccessHandle.write πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.HTMLElement.translate πŸ“‹Safari7/25/2012 Firefox3/14/20233884
api.HTMLFormElement.rel πŸ“‹Safari3/14/2022 Firefox3/14/2023365
api.HTMLFormElement.relList πŸ“‹Safari3/14/2022 Firefox3/14/2023365
api.StorageManager.getDirectory πŸ“‹Safari12/13/2021 Firefox3/14/2023456
api.XMLHttpRequest.authorization_removed_cross_origin πŸ“‹Safari10/24/2022 Firefox3/14/2023141
api.createImageBitmap.options_imageOrientation_parameter.from-image Safari9/12/2022 Firefox3/14/2023183
api.fetch.authorization_removed_cross_origin πŸ“‹Safari10/24/2022 Firefox3/14/2023141
html.elements.form.rel πŸ“‹Safari3/14/2022 Firefox3/14/2023365
html.global_attributes.translate πŸ“‹Safari7/25/2012 Firefox3/14/20233884
http.headers.Authorization.authorization_removed_cross_origin πŸ“‹Safari10/24/2022 Firefox3/14/2023141

2023/2

API First Browser Date Last Browser Date Days Notes
api.CSSContainerRule πŸ“‹Safari9/12/2022 Firefox2/14/2023155
api.CSSPageRule.selectorText πŸ“‹Safari10/26/2007 Firefox2/14/20235590
api.HTMLElement.autofocus πŸ“‹Safari3/14/2022 Firefox2/14/2023337
Chrome: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Chrome Android: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Edge: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Firefox: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Firefox for Android: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Internet Explorer: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Quest Browser: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Opera: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Opera Android: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Safari: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Safari on iOS: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.Samsung Internet: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.WebView Android: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.WebView on iOS: Supported for HTMLButtonElement, HTMLInputElement, HTMLSelectElement, and HTMLTextAreaElement.
api.MathMLElement.autofocus πŸ“‹Safari3/14/2022 Firefox2/14/2023337
api.RTCPeerConnection.addTransceiver.init_sendEncodings_parameter Safari4/26/2021 Firefox2/14/2023659
api.RTCRtpSender.getParameters.return_object_property_transactionId πŸ“‹Safari3/25/2019 Firefox2/14/20231422
api.RTCRtpSender.setParameters.parameters_encodings_parameter.active Safari4/12/2018 Firefox2/14/20231769
api.RTCRtpSender.setParameters.parameters_transactionId_parameter πŸ“‹Safari3/25/2019 Firefox2/14/20231422
api.SVGElement.autofocus πŸ“‹Safari3/14/2022 Firefox2/14/2023337
Firefox: Only supported on SVGGraphicsElement.Firefox for Android: Only supported on SVGGraphicsElement.
css.at-rules.container πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.at-rules.media.color-gamut πŸ“‹Safari9/20/2016 Firefox2/14/20232338
css.at-rules.media.color-gamut.p3 πŸ“‹Safari9/20/2016 Firefox2/14/20232338
Firefox: color-gamut: p3 is always false because Firefox does not support wide-gamut color. See bug 1626624.Firefox for Android: color-gamut: p3 is always false because Firefox for Android does not support wide-gamut color. See bug 1626624.
css.at-rules.media.color-gamut.rec2020 πŸ“‹Safari9/20/2016 Firefox2/14/20232338
Firefox: color-gamut: rec2020 is always false because Firefox does not support wide-gamut color. See bug 1626624.Firefox for Android: color-gamut: rec2020 is always false because Firefox for Android does not support wide-gamut color. See bug 1626624.
css.at-rules.media.color-gamut.srgb πŸ“‹Safari9/20/2016 Firefox2/14/20232338
Firefox: color-gamut: srgb is always true because Firefox does not support wide-gamut color. See bug 1626624.Firefox for Android: color-gamut: srgb is always true because Firefox for Android does not support wide-gamut color. See bug 1626624.
css.properties.container πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container.inline-size πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container.none πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container.normal πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container.scroll-state πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container.size πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-name πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-name.none πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-type πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-type.inline-size πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-type.normal πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.container-type.size πŸ“‹Safari9/12/2022 Firefox2/14/2023155
css.properties.page πŸ“‹Safari6/23/2003 Firefox2/14/20237176
css.properties.page.auto πŸ“‹Safari6/23/2003 Firefox2/14/20237176
css.types.length.container_query_length_units Safari9/12/2022 Firefox2/14/2023155
html.elements.datalist.input_type_range πŸ“‹Safari3/25/2019 Firefox2/14/20231422
html.elements.input.type_range.list πŸ“‹Safari3/25/2019 Firefox2/14/20231422
html.global_attributes.autofocus πŸ“‹Safari3/14/2022 Firefox2/14/2023337
Chrome: Supported for the <button>, <input>, <select>, and <textarea> elements.Chrome Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Edge: Supported for the <button>, <input>, <select>, and <textarea> elements.Firefox: Supported for the <button>, <input>, <select>, and <textarea> elements.Firefox for Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Internet Explorer: Supported for the <button>, <input>, <select>, and <textarea> elements.Quest Browser: Supported for the <button>, <input>, <select>, and <textarea> elements.Opera: Supported for the <button>, <input>, <select>, and <textarea> elements.Opera Android: Supported for the <button>, <input>, <select>, and <textarea> elements.Safari: Supported for the <button>, <input>, <select>, and <textarea> elements.Safari on iOS: If there's no hardware keyboard connected, then the autofocus attribute has no effect (for example, the focus event doesn't fire and the element does not match the :focus selector).Samsung Internet: Supported for the <button>, <input>, <select>, and <textarea> elements.WebView Android: Supported for the <button>, <input>, <select>, and <textarea> elements.WebView on iOS: If there's no hardware keyboard connected, then the autofocus attribute has no effect (for example, the focus event doesn't fire and the element does not match the :focus selector).

2023/1

API First Browser Date Last Browser Date Days Notes
html.elements.form.autocomplete.one-time-code Safari9/17/2018 Firefox1/17/20231583
html.elements.input.type_range.tick_marks Safari3/25/2019 Firefox1/17/20231394
html.elements.textarea.autocomplete.one-time-code Safari9/17/2018 Firefox1/17/20231583
http.headers.Content-Security-Policy.unsafe-hashes Safari3/14/2022 Firefox1/17/2023309

2022/12

API First Browser Date Last Browser Date Days Notes
api.CSSFontFeatureValuesRule πŸ“‹Firefox12/1/2014 Safari12/13/20222934
Chrome: Not exposed on Window. See bug 385925149.Chrome Android: Not exposed on Window. See bug 385925149.Edge: Not exposed on Window. See bug 385925149.Opera: Not exposed on Window. See bug 385925149.Opera Android: Not exposed on Window. See bug 385925149.Samsung Internet: Not exposed on Window. See bug 385925149.WebView Android: Not exposed on Window. See bug 385925149.
api.CSSFontFeatureValuesRule.fontFamily πŸ“‹Firefox12/1/2014 Safari12/13/20222934
api.HTMLSourceElement.height πŸ“‹Safari9/20/2021 Firefox12/13/2022449
api.HTMLSourceElement.width πŸ“‹Safari9/20/2021 Firefox12/13/2022449
api.OES_draw_buffers_indexed πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.blendEquationSeparateiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.blendEquationiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.blendFuncSeparateiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.blendFunciOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.colorMaskiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.disableiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
api.OES_draw_buffers_indexed.enableiOES πŸ“‹Safari9/12/2022 Firefox12/13/202292
css.properties.align-items.flex_context.last_baseline Firefox3/7/2017 Safari12/13/20222107
css.properties.align-self.flex_context.last_baseline Firefox3/7/2017 Safari12/13/20222107
css.properties.font-variant-alternates.annotation πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.font-variant-alternates.character_variant πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.font-variant-alternates.ornaments πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.font-variant-alternates.styleset πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.font-variant-alternates.stylistic πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.font-variant-alternates.swash πŸ“‹Firefox12/1/2014 Safari12/13/20222934
css.properties.text-emphasis-position.over Safari10/22/2013 Firefox12/13/20223339
css.properties.text-emphasis-position.under Safari10/22/2013 Firefox12/13/20223339
css.types.acos πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.asin πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.atan πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.atan2 πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.calc-keyword πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.calc-keyword.e Safari3/14/2022 Firefox12/13/2022274
css.types.calc-keyword.pi Safari3/14/2022 Firefox12/13/2022274
css.types.cos πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.sin πŸ“‹Safari3/14/2022 Firefox12/13/2022274
css.types.tan πŸ“‹Safari3/14/2022 Firefox12/13/2022274
html.elements.source.height πŸ“‹Safari9/20/2021 Firefox12/13/2022449
html.elements.source.width πŸ“‹Safari9/20/2021 Firefox12/13/2022449
http.headers.Content-Security-Policy.script-src-attr πŸ“‹Safari3/14/2022 Firefox12/13/2022274
http.headers.Content-Security-Policy.script-src-elem πŸ“‹Safari3/14/2022 Firefox12/13/2022274
http.headers.Content-Security-Policy.style-src-attr πŸ“‹Safari3/14/2022 Firefox12/13/2022274

2022/11

API First Browser Date Last Browser Date Days Notes
api.CSSFontPaletteValuesRule πŸ“‹Safari3/14/2022 Firefox11/15/2022246
api.CSSFontPaletteValuesRule.basePalette πŸ“‹Safari3/14/2022 Firefox11/15/2022246
api.CSSFontPaletteValuesRule.fontFamily πŸ“‹Safari3/14/2022 Firefox11/15/2022246
api.CSSFontPaletteValuesRule.name πŸ“‹Safari3/14/2022 Firefox11/15/2022246
api.CSSFontPaletteValuesRule.overrideColors πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.at-rules.font-palette-values πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.at-rules.font-palette-values.base-palette πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.at-rules.font-palette-values.font-family πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.at-rules.font-palette-values.override-colors πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.properties.font-palette πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.properties.font-palette.dark πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.properties.font-palette.light πŸ“‹Safari3/14/2022 Firefox11/15/2022246
css.properties.font-palette.normal πŸ“‹Safari3/14/2022 Firefox11/15/2022246

2022/10

API First Browser Date Last Browser Date Days Notes
api.HTMLMetaElement.media πŸ“‹Safari9/20/2021 Firefox10/18/2022393
api.RTCStatsReport.type_inbound-rtp.concealmentEvents πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.fecPacketsDiscarded πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.fecPacketsReceived πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.headerBytesReceived πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.insertedSamplesForDeceleration πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.removedSamplesForAcceleration πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.totalAudioEnergy πŸ“‹Safari4/26/2021 Firefox10/18/2022540
api.RTCStatsReport.type_inbound-rtp.totalSamplesDuration πŸ“‹Safari4/26/2021 Firefox10/18/2022540

2022/9

API First Browser Date Last Browser Date Days Notes
api.FontFace.worker_support Safari9/20/2021 Firefox9/20/2022365
api.FontFaceSet.worker_support Safari9/20/2021 Firefox9/20/2022365
api.TextDecoderStream πŸ“‹Safari4/26/2021 Firefox9/20/2022512
Node.js: Available as a part of the stream/web module.
api.TextDecoderStream.TextDecoderStream πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextDecoderStream.encoding πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextDecoderStream.fatal πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextDecoderStream.ignoreBOM πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextDecoderStream.readable πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextDecoderStream.writable πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextEncoderStream πŸ“‹Safari4/26/2021 Firefox9/20/2022512
Node.js: Available as a part of the stream/web module.
api.TextEncoderStream.TextEncoderStream πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextEncoderStream.encoding πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextEncoderStream.readable πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.TextEncoderStream.writable πŸ“‹Safari4/26/2021 Firefox9/20/2022512
api.WorkerGlobalScope.fonts πŸ“‹Safari9/20/2021 Firefox9/20/2022365
css.at-rules.font-face.src.format_keyword Safari6/8/2009 Firefox9/20/20224852
api.AbortSignal.timeout_static πŸ“‹Firefox5/3/2022 Safari9/12/2022132
Chrome: Always aborts with an AbortError on timeout, not a TimeoutError.Chrome Android: Always aborts with an AbortError on timeout, not a TimeoutError.Edge: Always aborts with an AbortError on timeout, not a TimeoutError.Quest Browser: Always aborts with an AbortError on timeout, not a TimeoutError.Opera: Always aborts with an AbortError on timeout, not a TimeoutError.Opera Android: Always aborts with an AbortError on timeout, not a TimeoutError.Samsung Internet: Always aborts with an AbortError on timeout, not a TimeoutError.WebView Android: Always aborts with an AbortError on timeout, not a TimeoutError.
api.EXT_texture_compression_bptc πŸ“‹Firefox7/9/2019 Safari9/12/20221161
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
api.Element.animate.options_composite_parameter πŸ“‹Firefox8/25/2020 Safari9/12/2022748
api.FetchEvent.handled πŸ“‹Firefox12/15/2020 Safari9/12/2022636
api.FetchEvent.resultingClientId πŸ“‹Firefox1/29/2019 Safari9/12/20221322
api.HTMLFormElement.requestSubmit πŸ“‹Firefox4/7/2020 Safari9/12/2022888
api.HTMLInputElement.showPicker πŸ“‹Firefox5/31/2022 Safari9/12/2022104
api.HTMLInputElement.showPicker.color_input Firefox5/31/2022 Safari9/12/2022104
api.HTMLInputElement.showPicker.file_input Firefox5/31/2022 Safari9/12/2022104
api.HTMLScriptElement.supports_static πŸ“‹Firefox11/2/2021 Safari9/12/2022314
api.KeyframeEffect.composite πŸ“‹Firefox8/25/2020 Safari9/12/2022748
api.Navigator.permissions πŸ“‹Firefox4/26/2016 Safari9/12/20222330
api.Notification.data πŸ“‹Firefox12/1/2014 Safari9/12/20222842
api.NotificationEvent πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.NotificationEvent.NotificationEvent πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PermissionStatus πŸ“‹Firefox4/26/2016 Safari9/12/20222330
api.PermissionStatus.name πŸ“‹Firefox10/5/2021 Safari9/12/2022342
api.PermissionStatus.state πŸ“‹Firefox4/26/2016 Safari9/12/20222330
api.Permissions πŸ“‹Firefox4/26/2016 Safari9/12/20222330
api.Permissions.permission_geolocation Firefox4/26/2016 Safari9/12/20222330
api.Permissions.query πŸ“‹Firefox4/26/2016 Safari9/12/20222330
api.PushEvent πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushEvent.PushEvent πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushEvent.data πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushManager πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushManager.getSubscription πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushManager.permissionState πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushManager.subscribe πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Chrome: The options parameter with a applicationServerKey value is required.Chrome Android: The options parameter with a applicationServerKey value is required.Edge: The options parameter with a applicationServerKey value is required.Firefox: From Firefox 72 onwards, can only be called in response to a user gesture such as a click event.Firefox for Android: From Firefox Android 79 onwards, can only be called in response to a user gesture such as a click event.Quest Browser: The options parameter with a applicationServerKey value is required.Opera Android: The options parameter with a applicationServerKey value is required.Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.Samsung Internet: The options parameter with a applicationServerKey value is required.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushMessageData πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushMessageData.arrayBuffer πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushMessageData.blob πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushMessageData.json πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushMessageData.text πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.endpoint πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.expirationTime πŸ“‹Firefox1/11/2022 Safari9/12/2022244
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.getKey πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.options πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.toJSON πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscription.unsubscribe πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscriptionOptions πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.PushSubscriptionOptions.applicationServerKey πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.ServiceWorkerGlobalScope.notificationclick_event πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.
api.ServiceWorkerGlobalScope.notificationclose_event πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.
api.ServiceWorkerGlobalScope.push_event πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.ServiceWorkerGlobalScope.pushsubscriptionchange_event πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Firefox: The event does not have the oldSubscription and newSubscription properties. See bug 1497429.Firefox for Android: The event does not have the oldSubscription and newSubscription properties. See bug 1497429.Safari: Notifications are supported on macOS Ventura and later.
api.ServiceWorkerRegistration.getNotifications πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.ServiceWorkerRegistration.pushManager πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.ServiceWorkerRegistration.showNotification πŸ“‹Firefox1/26/2016 Safari9/12/20222421
Safari: Notifications are supported on macOS Ventura and later.Safari on iOS: Notifications are supported in web apps saved to the home screen.WebView on iOS: Notifications are supported in web apps saved to the home screen.
api.SharedWorker πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorker.SharedWorker πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorker.SharedWorker.mime_checks Firefox9/22/2020 Safari9/12/2022720
api.SharedWorker.error_event πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorker.port πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorkerGlobalScope πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorkerGlobalScope.close πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SharedWorkerGlobalScope.connect_event πŸ“‹Firefox4/29/2014 Safari9/12/20223058
Firefox: Before version 65 the data property of the event object was null; it is now initialized to an empty string, as per spec.Firefox for Android: Before version 65 the data property of the event object was null; it is now initialized to an empty string, as per spec.
api.SharedWorkerGlobalScope.name πŸ“‹Firefox4/29/2014 Safari9/12/20223058
api.SpeechSynthesis.voiceschanged_event πŸ“‹Firefox9/20/2016 Safari9/12/20222183
api.SpeechSynthesisErrorEvent.SpeechSynthesisErrorEvent πŸ“‹Firefox9/20/2016 Safari9/12/20222183
api.SpeechSynthesisEvent.SpeechSynthesisEvent πŸ“‹Firefox9/20/2016 Safari9/12/20222183
api.SpeechSynthesisEvent.charLength πŸ“‹Firefox4/19/2017 Safari9/12/20221972
api.SpeechSynthesisEvent.utterance πŸ“‹Firefox9/20/2016 Safari9/12/20222183
api.Window.gamepadconnected_event πŸ“‹Firefox6/1/2021 Safari9/12/2022468
Chrome: The ongamepadconnected event handler property is not supported. See bug 40175074.Chrome Android: The ongamepadconnected event handler property is not supported. See bug 40175074.Edge: The ongamepadconnected event handler property is not supported. See bug 40175074.Firefox: The ongamepadconnected event handler property is not supported. See bug 1697093.Firefox for Android: The ongamepadconnected event handler property is not supported. See bug 1697093.Quest Browser: The ongamepadconnected event handler property is not supported. See bug 40175074.Opera: The ongamepadconnected event handler property is not supported. See bug 40175074.Opera Android: The ongamepadconnected event handler property is not supported. See bug 40175074.Safari: The ongamepadconnected event handler property is not supported. See bug 223860.Safari on iOS: The ongamepadconnected event handler property is not supported. See bug 223860.Samsung Internet: The ongamepadconnected event handler property is not supported. See bug 40175074.WebView Android: The ongamepadconnected event handler property is not supported. See bug 40175074.WebView on iOS: The ongamepadconnected event handler property is not supported. See bug 223860.
api.Window.gamepaddisconnected_event πŸ“‹Firefox6/1/2021 Safari9/12/2022468
Chrome: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Chrome Android: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Edge: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Firefox: The ongamepaddisconnected event handler property is not supported. See bug 1697093.Firefox for Android: The ongamepaddisconnected event handler property is not supported. See bug 1697093.Quest Browser: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Opera: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Opera Android: The ongamepaddisconnected event handler property is not supported. See bug 40175074.Safari: The ongamepaddisconnected event handler property is not supported. See bug 223860.Safari on iOS: The ongamepaddisconnected event handler property is not supported. See bug 223860.Samsung Internet: The ongamepaddisconnected event handler property is not supported. See bug 40175074.WebView Android: The ongamepaddisconnected event handler property is not supported. See bug 40175074.WebView on iOS: The ongamepaddisconnected event handler property is not supported. See bug 223860.
api.WindowClient.navigate πŸ“‹Firefox11/15/2016 Safari9/12/20222127
Safari: This method exists, but always throws NotSupportedError.Safari on iOS: This method exists, but always throws NotSupportedError.
api.Worker.Worker.mime_checks Firefox9/22/2020 Safari9/12/2022720
api.WorkerGlobalScope.importScripts.mime_checks Firefox5/21/2019 Safari9/12/20221210
css.at-rules.media.forced-colors πŸ“‹Firefox6/1/2021 Safari9/12/2022468
css.at-rules.media.resolution πŸ“‹Firefox11/8/2011 Safari9/12/20223961
Firefox: Supports <integer> values only.Firefox for Android: Supports <integer> values only.
css.properties.contain.inline-size πŸ“‹Firefox5/31/2022 Safari9/12/2022104
css.properties.flex.fit-content πŸ“‹Firefox11/2/2021 Safari9/12/2022314
css.properties.flex.max-content πŸ“‹Firefox3/19/2019 Safari9/12/20221273
css.properties.flex.min-content πŸ“‹Firefox3/19/2019 Safari9/12/20221273
css.properties.flex-basis.fit-content Firefox11/2/2021 Safari9/12/2022314
css.properties.flex-basis.max-content Firefox3/19/2019 Safari9/12/20221273
css.properties.flex-basis.min-content Firefox3/19/2019 Safari9/12/20221273
css.properties.grid-template-columns.animation Firefox3/19/2019 Safari9/12/20221273
css.properties.grid-template-columns.subgrid πŸ“‹Firefox12/10/2019 Safari9/12/20221007
css.properties.grid-template-rows.animation Firefox3/19/2019 Safari9/12/20221273
css.properties.grid-template-rows.subgrid πŸ“‹Firefox12/10/2019 Safari9/12/20221007
css.properties.offset πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset.none πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.auto πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.bottom πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.center πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.left πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.right πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-anchor.top πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-distance πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-path.path Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-rotate πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-rotate.auto πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.offset-rotate.reverse πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.properties.overflow.clip πŸ“‹Firefox9/22/2020 Safari9/12/2022720
css.properties.overflow-x.clip πŸ“‹Firefox9/22/2020 Safari9/12/2022720
css.properties.overflow-y.clip πŸ“‹Firefox9/22/2020 Safari9/12/2022720
css.properties.overscroll-behavior πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior.auto πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior.contain πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior.none πŸ“‹Firefox3/13/2018 Safari9/12/20221644
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.overscroll-behavior-block πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-block.auto πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-block.contain πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-block.none πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-inline πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-inline.auto πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-inline.contain πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-inline.none πŸ“‹Firefox2/11/2020 Safari9/12/2022944
css.properties.overscroll-behavior-x πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-x.auto πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-x.contain πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-x.none πŸ“‹Firefox3/13/2018 Safari9/12/20221644
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.overscroll-behavior-y πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-y.auto πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-y.contain πŸ“‹Firefox3/13/2018 Safari9/12/20221644
css.properties.overscroll-behavior-y.none πŸ“‹Firefox3/13/2018 Safari9/12/20221644
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.resize.block Firefox10/23/2018 Safari9/12/20221420
css.properties.resize.inline Firefox10/23/2018 Safari9/12/20221420
css.properties.text-align-last πŸ“‹Firefox9/20/2016 Safari9/12/20222183
Internet Explorer: IE only supports text-align-last when text-align is set to justify.Internet Explorer: The start and end values are not supported.
css.properties.text-align-last.auto πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.center πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.end πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.justify πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.left πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.right πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.text-align-last.start πŸ“‹Firefox4/24/2012 Safari9/12/20223793
css.properties.user-select.all Firefox11/9/2004 Safari9/12/20226516
css.types.basic-shape.path.offset-path πŸ“‹Firefox1/7/2020 Safari9/12/2022979
css.types.overflow.clip Firefox9/22/2020 Safari9/12/2022720
css.types.resolution πŸ“‹Firefox11/8/2011 Safari9/12/20223961
Firefox: Supports <integer> values only.Firefox for Android: Supports <integer> values only.
css.types.resolution.dpcm Firefox11/8/2011 Safari9/12/20223961
css.types.resolution.dpi Firefox11/8/2011 Safari9/12/20223961
css.types.resolution.dppx Firefox10/9/2012 Safari9/12/20223625
css.types.resolution.x Firefox9/5/2018 Safari9/12/20221468
html.elements.iframe.sandbox.allow-top-navigation-to-custom-protocols πŸ“‹Firefox5/31/2022 Safari9/12/2022104
html.elements.textarea.placeholder.line_breaks Firefox3/13/2018 Safari9/12/20221644
html.elements.video.autoplay.requires_muted_audio Firefox5/21/2019 Safari9/12/20221210
Firefox for Android: Between versions 79 and 91, the default behavior was to block videos from autoplaying, regardless of whether audio was muted.
http.headers.Content-Security-Policy.script-src.wasm-unsafe-eval Firefox6/28/2022 Safari9/12/202276
javascript.classes.public_class_fields πŸ“‹Firefox9/3/2019 Safari9/12/20221105
Safari: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.Safari: Doesn't support public static fields. See bug 194095.Safari on iOS: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.Safari on iOS: Doesn't support public static fields. See bug 194095.WebView on iOS: Parentheses in field initializers can lead to ReferenceErrors. See bug 236843.WebView on iOS: Doesn't support public static fields. See bug 194095.

2022/8

API First Browser Date Last Browser Date Days Notes
api.RTCStatsReport.type_inbound-rtp.concealedSamples πŸ“‹Safari4/26/2021 Firefox8/23/2022484
api.RTCStatsReport.type_inbound-rtp.jitterBufferDelay πŸ“‹Safari4/26/2021 Firefox8/23/2022484
api.RTCStatsReport.type_inbound-rtp.jitterBufferEmittedCount πŸ“‹Safari4/26/2021 Firefox8/23/2022484
api.RTCStatsReport.type_inbound-rtp.silentConcealedSamples πŸ“‹Safari4/26/2021 Firefox8/23/2022484
api.RTCStatsReport.type_inbound-rtp.totalSamplesReceived πŸ“‹Safari4/26/2021 Firefox8/23/2022484
api.SVGStyleElement.disabled πŸ“‹Safari7/25/2012 Firefox8/23/20223681
javascript.builtins.Array.findLast πŸ“‹Safari3/14/2022 Firefox8/23/2022162
javascript.builtins.Array.findLastIndex πŸ“‹Safari3/14/2022 Firefox8/23/2022162
javascript.builtins.TypedArray.findLast πŸ“‹Safari3/14/2022 Firefox8/23/2022162
javascript.builtins.TypedArray.findLastIndex πŸ“‹Safari3/14/2022 Firefox8/23/2022162

2022/7

API First Browser Date Last Browser Date Days Notes
api.Performance.measure.measureOptions_parameter Safari4/26/2021 Firefox7/26/2022456
api.Performance.measure.returns_performancemeasure Safari4/26/2021 Firefox7/26/2022456
api.PerformanceMeasure.detail πŸ“‹Safari4/26/2021 Firefox7/26/2022456
api.caches.secure_context_required Safari4/12/2018 Firefox7/26/20221566
css.properties.backdrop-filter.none πŸ“‹Safari9/30/2015 Firefox7/26/20222491
css.properties.contain.style πŸ“‹Safari3/14/2022 Firefox7/26/2022134
Chrome: Before Chrome 115, style containment did not affect quotes, see bug 40592922.Chrome Android: Before Chrome Android 115, style containment did not affect quotes, see bug 40592922.Edge: Before Edge 115, style containment did not affect quotes, see bug 40592922.Quest Browser: Before Quest Browser false, style containment did not affect quotes, see bug 40592922.Opera: Before Opera 101, style containment did not affect quotes, see bug 40592922.Opera Android: Before Opera Android 77, style containment did not affect quotes, see bug 40592922.Safari: Style containment does not affect quotes, see bug 232083.Safari on iOS: Style containment does not affect quotes, see bug 232083.Samsung Internet: Before Samsung Internet 23.0, style containment did not affect quotes, see bug 40592922.WebView Android: Before WebView Android 115, style containment did not affect quotes, see bug 40592922.WebView on iOS: Style containment does not affect quotes, see bug 232083.
css.properties.scroll-snap-stop πŸ“‹Safari9/20/2021 Firefox7/26/2022309
css.properties.scroll-snap-stop.always πŸ“‹Safari9/20/2021 Firefox7/26/2022309
css.properties.scroll-snap-stop.normal πŸ“‹Safari9/20/2021 Firefox7/26/2022309
css.selectors.modal πŸ“‹Safari7/20/2022 Firefox7/26/20226
css.properties.align-content.flex_context.start_end Firefox3/8/2016 Safari7/20/20222325
Opera: Before version 79, this value is recognized, but has no effect.Opera Android: This value is recognized, but has no effect.

2022/6

API First Browser Date Last Browser Date Days Notes
api.ReadableStream.pipeThrough πŸ“‹Safari3/27/2017 Firefox6/28/20221919
api.TransformStream πŸ“‹Safari4/26/2021 Firefox6/28/2022428
Node.js: Available as a part of the stream/web module.
api.TransformStream.TransformStream πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStream.readable πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStream.writable πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStreamDefaultController πŸ“‹Safari4/26/2021 Firefox6/28/2022428
Deno: TransformStreamDefaultController is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.TransformStreamDefaultController.desiredSize πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStreamDefaultController.enqueue πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStreamDefaultController.error πŸ“‹Safari4/26/2021 Firefox6/28/2022428
api.TransformStreamDefaultController.terminate πŸ“‹Safari4/26/2021 Firefox6/28/2022428

2022/5

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.direction πŸ“‹Safari9/30/2015 Firefox5/31/20222435
api.Performance.mark.markOptions_parameter Safari4/26/2021 Firefox5/31/2022400
api.Performance.mark.returns_performancemark Safari4/26/2021 Firefox5/31/2022400
api.PerformanceMark.PerformanceMark πŸ“‹Safari4/26/2021 Firefox5/31/2022400
api.PerformanceMark.detail πŸ“‹Safari4/26/2021 Firefox5/31/2022400
api.RTCRtpSender.setParameters.parameters_encodings_parameter.maxFramerate πŸ“‹Safari9/19/2017 Firefox5/31/20221715
Firefox: Zero is treated as 'no fps limit' (see bug 1611957).Firefox for Android: Zero is treated as 'no fps limit' (see bug 1611957).
css.at-rules.media.prefers-contrast πŸ“‹Safari4/26/2021 Firefox5/31/2022400
css.types.length.vb Safari3/14/2022 Firefox5/31/202278
css.types.length.vi Safari3/14/2022 Firefox5/31/202278
css.types.length.viewport_percentage_units_dynamic Safari3/14/2022 Firefox5/31/202278
css.types.length.viewport_percentage_units_large Safari3/14/2022 Firefox5/31/202278
css.types.length.viewport_percentage_units_small Safari3/14/2022 Firefox5/31/202278
html.global_attributes.nonce πŸ“‹Firefox4/7/2020 Safari5/16/2022769
Firefox: Firefox does not prevent nonce exfiltration through content attributes.Firefox for Android: Firefox for Android does not prevent nonce exfiltration through content attributes.Safari: Safari does not prevent nonce exfiltration through content attributes.Safari on iOS: Safari on iOS does not prevent nonce exfiltration through content attributes.WebView on iOS: WebView on iOS does not prevent nonce exfiltration through content attributes.
http.headers.Content-Security-Policy.worker-src πŸ“‹Firefox1/23/2018 Safari5/16/20221574
Chrome: Chrome 59 and higher skips the deprecated child-src directive.Chrome Android: Chrome Android 59 and higher skips the deprecated child-src directive.Quest Browser: Quest Browser 5.0 and higher skips the deprecated child-src directive.Opera: Opera 46 and higher skips the deprecated child-src directive.Opera Android: Opera Android 43 and higher skips the deprecated child-src directive.WebView Android: WebView Android 59 and higher skips the deprecated child-src directive.
api.RTCStatsReport.type_outbound-rtp.headerBytesSent πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.RTCStatsReport.type_outbound-rtp.retransmittedBytesSent πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.RTCStatsReport.type_outbound-rtp.retransmittedPacketsSent πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.ReadableStream.pipeTo πŸ“‹Safari3/27/2017 Firefox5/3/20221863
api.ReadableStreamDefaultReader.ReadableStreamDefaultReader πŸ“‹Safari9/20/2016 Firefox5/3/20222051
api.WritableStream πŸ“‹Safari4/26/2021 Firefox5/3/2022372
Node.js: Available as a part of the stream/web module.
api.WritableStream.WritableStream πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStream.abort πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStream.close πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStream.getWriter πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStream.locked πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultController πŸ“‹Safari4/26/2021 Firefox5/3/2022372
Node.js: Available as a part of the stream/web module.
api.WritableStreamDefaultController.error πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter πŸ“‹Safari4/26/2021 Firefox5/3/2022372
Node.js: Available as a part of the stream/web module.
api.WritableStreamDefaultWriter.WritableStreamDefaultWriter πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.abort πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.close πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.closed πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.desiredSize πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.ready πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.releaseLock πŸ“‹Safari4/26/2021 Firefox5/3/2022372
api.WritableStreamDefaultWriter.write πŸ“‹Safari4/26/2021 Firefox5/3/2022372
css.at-rules.media.dynamic-range πŸ“‹Safari3/24/2020 Firefox5/3/2022770
webassembly.api.Exception πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Exception.Exception πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Exception.Exception.options_parameter_traceStack Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Exception.getArg πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Exception.is πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Tag πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.api.Tag.Tag πŸ“‹Safari12/13/2021 Firefox5/3/2022141
webassembly.exception-handling πŸ“‹Safari12/13/2021 Firefox5/3/2022141

2022/4

API First Browser Date Last Browser Date Days Notes
api.FetchEvent.preloadResponse πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.NavigationPreloadManager πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.NavigationPreloadManager.disable πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.NavigationPreloadManager.enable πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.NavigationPreloadManager.getState πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.NavigationPreloadManager.setHeaderValue πŸ“‹Safari3/14/2022 Firefox4/5/202222
api.RTCPeerConnection.setConfiguration πŸ“‹Safari9/19/2017 Firefox4/5/20221659
api.ServiceWorkerRegistration.navigationPreload πŸ“‹Safari3/14/2022 Firefox4/5/202222
css.properties.mix-blend-mode.plus-lighter πŸ“‹Safari3/21/2016 Firefox4/5/20222206
css.properties.scroll-snap-type πŸ“‹Safari9/19/2017 Firefox4/5/20221659
Edge: Edge supports an earlier draft of CSS Scroll Snap without axis values.Firefox: On macOS Monterey, scroll snapping does not complete reliably. See bug 1749352.Firefox: An earlier draft of CSS Scroll Snap without axis values.Firefox for Android: An earlier draft of CSS Scroll Snap without axis values.Internet Explorer: Internet Explorer supports an earlier draft of CSS Scroll Snap without axis values.Safari: Older Safari versions support an earlier draft of CSS Scroll Snap without axis values.Safari on iOS: Older Safari on iOS versions support an earlier draft of CSS Scroll Snap without axis values.WebView on iOS: Older WebView on iOS versions support an earlier draft of CSS Scroll Snap without axis values.

2022/3

API First Browser Date Last Browser Date Days Notes
api.AbortController.abort.reason_parameter πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.AbortSignal.abort_static.reason_parameter πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.AbortSignal.reason πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.AbortSignal.throwIfAborted πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.BroadcastChannel πŸ“‹Firefox5/12/2015 Safari3/14/20222498
Node.js: Available as a part of the worker_threads module.
api.BroadcastChannel.BroadcastChannel πŸ“‹Firefox5/12/2015 Safari3/14/20222498
api.BroadcastChannel.close πŸ“‹Firefox5/12/2015 Safari3/14/20222498
api.BroadcastChannel.message_event πŸ“‹Firefox5/12/2015 Safari3/14/20222498
api.BroadcastChannel.messageerror_event πŸ“‹Firefox11/14/2017 Safari3/14/20221581
api.BroadcastChannel.name πŸ“‹Firefox5/12/2015 Safari3/14/20222498
api.BroadcastChannel.postMessage πŸ“‹Firefox5/12/2015 Safari3/14/20222498
api.CSSImportRule.layerName πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.CSSLayerBlockRule πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.CSSLayerBlockRule.name πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.CSSLayerStatementRule πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.CSSLayerStatementRule.nameList πŸ“‹Firefox2/8/2022 Safari3/14/202234
api.Crypto.randomUUID πŸ“‹Firefox12/7/2021 Safari3/14/202297
Node.js: Since 14.17.0 and 15.6.0, a similar method is available via the crypto module.
api.Document.securitypolicyviolation_event πŸ“‹Firefox10/5/2021 Safari3/14/2022160
api.HTMLDialogElement πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.cancel_event πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.close πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.close_event πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.open πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.returnValue πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.show πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLDialogElement.showModal πŸ“‹Firefox3/8/2022 Safari3/14/20226
api.HTMLElement.nonce πŸ“‹Firefox4/7/2020 Safari3/14/2022706
Safari: The property is defined only for its useful elements: <link>, <script>, and <style>; it is undefined for all other elements.Safari on iOS: The property is defined only for its useful elements: <link>, <script>, and <style>; it is undefined for all other elements.WebView on iOS: The property is defined only for its useful elements: <link>, <script>, and <style>; it is undefined for all other elements.
api.HTMLImageElement.loading πŸ“‹Firefox4/7/2020 Safari3/14/2022706
api.Lock πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.Lock.mode πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.Lock.name πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.LockManager πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.LockManager.query πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.LockManager.request πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.MediaCapabilities.encodingInfo πŸ“‹Firefox10/23/2018 Safari3/14/20221238
Firefox: The webrtc value of the type option is named transmission.Firefox for Android: The webrtc value of the type option is named transmission.
api.Navigator.hardwareConcurrency πŸ“‹Firefox8/2/2016 Safari3/14/20222050
Safari: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.Safari on iOS: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.WebView on iOS: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.
api.Navigator.locks πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.RTCDtlsTransport πŸ“‹Firefox10/20/2020 Safari3/14/2022510
api.RTCDtlsTransport.state πŸ“‹Firefox10/20/2020 Safari3/14/2022510
api.RTCDtlsTransport.statechange_event Firefox10/20/2020 Safari3/14/2022510
api.RTCPeerConnection.canTrickleIceCandidates πŸ“‹Firefox6/7/2016 Safari3/14/20222106
api.RTCPeerConnection.setRemoteDescription.implicit_rollback Firefox10/22/2019 Safari3/14/2022874
api.RTCRtpReceiver.transport πŸ“‹Firefox10/20/2020 Safari3/14/2022510
api.RTCRtpSender.transport πŸ“‹Firefox10/20/2020 Safari3/14/2022510
api.RTCStatsReport.type_inbound-rtp.packetsDiscarded πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.RTCStatsReport.type_outbound-rtp.nackCount πŸ“‹Firefox8/8/2017 Safari3/14/20221679
api.ResizeObserver.observe.options_box_parameter Firefox9/3/2019 Safari3/14/2022923
Firefox: Before version 93, the device-pixel-content-box value is not supported.Firefox for Android: Before version 93, the device-pixel-content-box value is not supported.
api.ResizeObserverEntry.borderBoxSize πŸ“‹Firefox9/7/2021 Safari3/14/2022188
Firefox: Implemented as a single object representing a content box size, rather than an array of content box size objects.Firefox for Android: Implemented as a single object representing a content box size, rather than an array of content box size objects.
api.ResizeObserverEntry.contentBoxSize πŸ“‹Firefox9/7/2021 Safari3/14/2022188
Firefox: Implemented as a single object representing a content box size, rather than an array of content box size objects.Firefox for Android: Implemented as a single object representing a content box size, rather than an array of content box size objects.
api.ResizeObserverSize πŸ“‹Firefox9/3/2019 Safari3/14/2022923
api.ResizeObserverSize.blockSize πŸ“‹Firefox9/3/2019 Safari3/14/2022923
api.ResizeObserverSize.inlineSize πŸ“‹Firefox9/3/2019 Safari3/14/2022923
api.SVGElement.nonce πŸ“‹Firefox4/7/2020 Safari3/14/2022706
api.SubmitEvent.submitter πŸ“‹Firefox4/7/2020 Safari3/14/2022706
Safari: Property is not set for <button> elements. See bug 229660.Safari on iOS: Property is not set for <button> elements. See bug 229660.WebView on iOS: Property is not set for <button> elements. See bug 229660.
api.WorkerNavigator.hardwareConcurrency πŸ“‹Firefox8/2/2016 Safari3/14/20222050
Safari: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.Safari on iOS: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.WebView on iOS: The value of this property is clamped to 4 or 8 cores, to prevent device fingerprinting. See bug 233381.
api.WorkerNavigator.locks πŸ“‹Firefox1/11/2022 Safari3/14/202262
api.WorkerNavigator.mediaCapabilities πŸ“‹Firefox10/23/2018 Safari3/14/20221238
api.reportError πŸ“‹Firefox10/5/2021 Safari3/14/2022160
api.structuredClone πŸ“‹Firefox11/2/2021 Safari3/14/2022132
Deno: The message parameter does not support cloning Blob values.Deno: The message parameter does not support cloning Blob values.Deno: The transfer parameter does not accept ArrayBuffer items. Passing an ArrayBuffer results in an error being thrown.
css.at-rules.import.layer πŸ“‹Firefox2/8/2022 Safari3/14/202234
css.at-rules.layer πŸ“‹Firefox2/8/2022 Safari3/14/202234
css.properties.accent-color πŸ“‹Firefox9/7/2021 Safari3/14/2022188
Chrome Android: Chrome for Android does not maintain minimum contrast for legibility of the control. See bug 343503163.Quest Browser: Chrome for Android does not maintain minimum contrast for legibility of the control. See bug 343503163.Opera Android: Chrome for Android does not maintain minimum contrast for legibility of the control. See bug 343503163.Safari: Safari does not maintain minimum contrast for legibility of the control. See bug 244233.Safari on iOS: Safari on iOS does not maintain minimum contrast for legibility of the control. See bug 244233.Samsung Internet: Chrome for Android does not maintain minimum contrast for legibility of the control. See bug 343503163.WebView Android: Chrome for Android does not maintain minimum contrast for legibility of the control. See bug 343503163.WebView on iOS: WebView on iOS does not maintain minimum contrast for legibility of the control. See bug 244233.
css.properties.accent-color.auto Firefox9/7/2021 Safari3/14/2022188
css.properties.align-items.flex_context.start_end Firefox3/8/2016 Safari3/14/20222197
css.properties.align-self.flex_context.start_end Firefox3/8/2016 Safari3/14/20222197
Opera: Before version 79, this value is recognized, but has no effect.
css.properties.appearance πŸ“‹Firefox8/25/2020 Safari3/14/2022566
css.properties.appearance.auto πŸ“‹Firefox8/25/2020 Safari3/14/2022566
css.properties.backface-visibility πŸ“‹Firefox10/9/2012 Safari3/14/20223443
css.properties.background-attachment.fixed πŸ“‹Firefox10/24/2006 Safari3/14/20225620
Safari: fixed is recognized but has no effect. See related bug 219324.Safari on iOS: fixed is recognized but has no effect. See bug 275247.WebView on iOS: fixed is recognized but has no effect. See bug 275247.
css.properties.background-attachment.local πŸ“‹Firefox10/29/2013 Safari3/14/20223058
Safari: local is recognized but has no effect. See bug 219324.Safari on iOS: local is recognized but has no effect. See bug 219324.Safari on iOS: If -webkit-overflow-scrolling: touch is set, then local has no effect.WebView on iOS: local is recognized but has no effect. See bug 219324.WebView on iOS: If -webkit-overflow-scrolling: touch is set, then local has no effect.
css.properties.background-position-x.side-relative_values Firefox9/20/2016 Safari3/14/20222001
css.properties.background-position-y.side-relative_values Firefox9/20/2016 Safari3/14/20222001
css.properties.color-adjust πŸ“‹Firefox8/2/2016 Safari3/14/20222050
css.properties.color-adjust.economy πŸ“‹Firefox8/2/2016 Safari3/14/20222050
css.properties.color-adjust.exact πŸ“‹Firefox8/2/2016 Safari3/14/20222050
css.properties.contain πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.content πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.layout πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.none πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.paint πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.size πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.contain.strict πŸ“‹Firefox9/3/2019 Safari3/14/2022923
css.properties.flex-basis.content Firefox6/26/2018 Safari3/14/20221357
css.properties.justify-content.flex_context.start_end Firefox3/8/2016 Safari3/14/20222197
css.properties.mask πŸ“‹Firefox4/19/2017 Safari3/14/20221790
Chrome: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Chrome: While the property is recognized, values applied to it don't have any effect.Chrome Android: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Chrome Android: While the property is recognized, values applied to it don't have any effect.Edge: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Edge: While the property is recognized, values applied to it don't have any effect.Firefox: Only supports mask: url(file.svg#mask_id) or mask: url(#mask_id), where the URL is a reference to an SVG <mask> element.Firefox for Android: Only supports mask: url(file.svg#mask_id) or mask: url(#mask_id), where the URL is a reference to an SVG <mask> element.Quest Browser: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Quest Browser: While the property is recognized, values applied to it don't have any effect.Opera: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Opera: While the property is recognized, values applied to it don't have any effect.Opera Android: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Opera Android: While the property is recognized, values applied to it don't have any effect.Safari: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Safari: While the property is recognized, values applied to it don't have any effect.Safari on iOS: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Safari on iOS: While the property is recognized, values applied to it don't have any effect.Samsung Internet: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.Samsung Internet: While the property is recognized, values applied to it don't have any effect.WebView Android: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.WebView Android: While the property is recognized, values applied to it don't have any effect.WebView on iOS: The prefixed property can be used with SVG and HTML with a slightly different syntax, which allows setting the non-standard -webkit-mask-attachment property.WebView on iOS: While the property is recognized, values applied to it don't have any effect.
css.properties.mask-clip πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-composite πŸ“‹Firefox4/19/2017 Safari3/14/20221790
Chrome: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Chrome Android: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Edge: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Opera: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Opera Android: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Safari: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Safari on iOS: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.Samsung Internet: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.WebView Android: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.WebView on iOS: See also -webkit-mask-composite for a similar non-standard property that uses different keywords.
css.properties.mask-composite.add πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-composite.exclude πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-composite.intersect πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-composite.subtract πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-image πŸ“‹Firefox4/19/2017 Safari3/14/20221790
Chrome: From version 8, Chrome added support for gradient values. Initially, Chrome supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.Chrome Android: From version 18, Chrome Android added support for gradient values. Initially, Chrome Android supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.Quest Browser: From version 5.0, Quest Browser added support for gradient values. Initially, Quest Browser supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.Safari: Initially, Safari supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.Safari on iOS: Initially, Safari on iOS supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.Samsung Internet: From version 1.0, Samsung Internet added support for gradient values. Initially, Samsung Internet supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.WebView Android: Initially, Android supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.WebView on iOS: Initially, WebView on iOS supported only -webkit- prefixed values for gradients (such as -webkit-linear-gradient()). Later, support for unprefixed values was added.
css.properties.mask-mode πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-mode.alpha πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-mode.luminance πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-mode.match-source πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-origin πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-position πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-repeat πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.mask-size πŸ“‹Firefox4/19/2017 Safari3/14/20221790
css.properties.offset-path πŸ“‹Firefox1/7/2020 Safari3/14/2022797
Samsung Internet: path() is the only value type supported.
css.properties.overflow-wrap.anywhere πŸ“‹Firefox1/29/2019 Safari3/14/20221140
css.properties.print-color-adjust πŸ“‹Firefox2/8/2022 Safari3/14/202234
Chrome: Chrome does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Chrome: Before version 26, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Chrome Android: Chrome Android does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Chrome Android: Before version 26, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Edge: Edge does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Edge: Before version 79, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Quest Browser: Quest Browser does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Quest Browser: Before version 5.0, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Opera: Opera does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Opera: Before version 15, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Opera Android: Opera Android does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Opera Android: Before version 14, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.Safari: Safari does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Safari on iOS: Safari on iOS does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Samsung Internet: Samsung Internet does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.Samsung Internet: Before version 1.5, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.WebView Android: WebView Android does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.WebView Android: Before version 4.4, if background images are clipped (for example, when using background-image sprites) and -webkit-print-color-adjust is set to exact, then backgrounds will appear distorted when printed. Solid backgrounds and background images that are not clipped (i.e., backgrounds that have narrower and shorter than the element to which they are applied) are printed correctly. See bug 40219905.WebView on iOS: WebView on iOS does not print backgrounds of the <body> element. If this property is set to exact for the <body> element, it will apply only to its descendants.
css.properties.scroll-behavior πŸ“‹Firefox2/24/2015 Safari3/14/20222575
css.properties.scroll-behavior.auto πŸ“‹Firefox2/24/2015 Safari3/14/20222575
css.properties.scroll-behavior.smooth πŸ“‹Firefox2/24/2015 Safari3/14/20222575
css.properties.text-align.match-parent πŸ“‹Firefox8/11/2015 Safari3/14/20222407
css.properties.text-combine-upright πŸ“‹Firefox8/2/2016 Safari3/14/20222050
Chrome: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Chrome Android: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Firefox: Before version 81, Firefox implemented the property as animatable. This was corrected to spec in 81.Firefox for Android: Before version 81, Firefox for Android implemented the property as animatable. This was corrected to spec in 81.Quest Browser: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Opera: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Opera Android: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Safari: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Safari on iOS: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.Samsung Internet: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.WebView Android: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.WebView on iOS: This property was initially named -webkit-text-combine according to a 2011 version of the CSS3 Writing Modes specification, supporting the values none and horizontal without digits.
css.properties.text-combine-upright.all πŸ“‹Firefox8/2/2016 Safari3/14/20222050
css.properties.text-combine-upright.none πŸ“‹Firefox8/2/2016 Safari3/14/20222050
css.properties.text-decoration-skip-ink πŸ“‹Firefox10/22/2019 Safari3/14/2022874
css.properties.text-decoration-skip-ink.all πŸ“‹Firefox4/7/2020 Safari3/14/2022706
css.properties.text-decoration-skip-ink.auto πŸ“‹Firefox10/22/2019 Safari3/14/2022874
css.properties.text-decoration-skip-ink.none πŸ“‹Firefox10/22/2019 Safari3/14/2022874
css.selectors.backdrop πŸ“‹Firefox6/7/2016 Safari3/14/20222106
css.selectors.backdrop.dialog Firefox3/8/2022 Safari3/14/20226
css.selectors.focus-visible πŸ“‹Firefox1/26/2021 Safari3/14/2022412
css.types.global_keywords.revert-layer πŸ“‹Firefox2/8/2022 Safari3/14/202234
css.types.length.ic Firefox2/8/2022 Safari3/14/202234
css.types.transform-function.perspective.none πŸ“‹Firefox10/5/2021 Safari3/14/2022160
html.elements.dialog πŸ“‹Firefox3/8/2022 Safari3/14/20226
html.elements.dialog.open Firefox3/8/2022 Safari3/14/20226
html.elements.img.loading πŸ“‹Firefox4/7/2020 Safari3/14/2022706
http.headers.Content-Security-Policy.report-sample Firefox10/23/2018 Safari3/14/20221238
http.headers.Content-Security-Policy.strict-dynamic Firefox3/7/2017 Safari3/14/20221833
javascript.builtins.Array.at πŸ“‹Firefox7/13/2021 Safari3/14/2022244
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter.extended_values Firefox8/10/2021 Safari3/14/2022216
javascript.builtins.Intl.supportedValuesOf πŸ“‹Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_calendar Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_collation Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_currency Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_numberingSystem Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_timeZone Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_timeZone.includes_UTC Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Intl.supportedValuesOf.key_parameter_unit Firefox10/5/2021 Safari3/14/2022160
javascript.builtins.Object.hasOwn πŸ“‹Firefox9/7/2021 Safari3/14/2022188
javascript.builtins.String.at πŸ“‹Firefox7/13/2021 Safari3/14/2022244
javascript.builtins.TypedArray.at πŸ“‹Firefox7/13/2021 Safari3/14/2022244
api.HTMLElement.outerText πŸ“‹Safari4/15/2005 Firefox3/8/20226171
api.RTCStatsReport.type_codec πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.channels πŸ“‹Safari4/26/2021 Firefox3/8/2022316
api.RTCStatsReport.type_codec.clockRate πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.id πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.mimeType πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.payloadType πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.sdpFmtpLine πŸ“‹Safari9/16/2020 Firefox3/8/2022538
api.RTCStatsReport.type_codec.timestamp πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_codec.type πŸ“‹Safari3/24/2020 Firefox3/8/2022714
api.RTCStatsReport.type_outbound-rtp.codecId πŸ“‹Safari9/19/2017 Firefox3/8/20221631
api.RTCStatsReport.type_remote-inbound-rtp.codecId πŸ“‹Safari9/19/2017 Firefox3/8/20221631
api.RTCStatsReport.type_remote-outbound-rtp.codecId πŸ“‹Safari9/19/2017 Firefox3/8/20221631
api.console.profileEnd_static Safari6/8/2009 Firefox3/8/20224656
Firefox: The method can be called, but the marker does not show up in the performance profile.Firefox for Android: The method can be called, but the marker does not show up in the performance profile.
api.console.profile_static Safari6/8/2009 Firefox3/8/20224656
Firefox: The method can be called, but the marker does not show up in the performance profile.Firefox for Android: The method can be called, but the marker does not show up in the performance profile.
api.console.timeStamp_static Safari7/25/2012 Firefox3/8/20223513
Firefox: The method can be called, but the marker does not show up in the performance profile.Firefox for Android: The method can be called, but the marker does not show up in the performance profile.
api.createImageBitmap.options_colorSpaceConversion_parameter Safari9/20/2021 Firefox3/8/2022169
api.createImageBitmap.options_resizeHeight_parameter Safari9/20/2021 Firefox3/8/2022169
api.createImageBitmap.options_resizeWidth_parameter Safari9/20/2021 Firefox3/8/2022169
css.properties.hyphenate-character.auto πŸ“‹Safari7/20/2011 Firefox3/8/20223884

2022/2

API First Browser Date Last Browser Date Days Notes
api.ImageBitmapRenderingContext.canvas πŸ“‹Safari4/12/2018 Firefox2/8/20221398
css.properties.print-color-adjust.economy πŸ“‹Safari7/25/2012 Firefox2/8/20223485
css.properties.print-color-adjust.exact πŸ“‹Safari7/25/2012 Firefox2/8/20223485

2022/1

API First Browser Date Last Browser Date Days Notes
api.Navigator.canShare πŸ“‹Safari9/16/2020 Firefox1/11/2022482
Chrome: Only supported on ChromeOS and Windows, see bug 40542648 and bug 40729163.Edge: Only supported on Windows.Opera: Only supported on ChromeOS and Windows, see bug 40542648 and bug 40729163.
api.Navigator.canShare.data_text_parameter πŸ“‹Safari9/16/2020 Firefox1/11/2022482
api.RTCStatsReport.type_remote-inbound-rtp.roundTripTime πŸ“‹Safari4/26/2021 Firefox1/11/2022260
css.properties.color-scheme πŸ“‹Safari9/19/2019 Firefox1/11/2022845
css.properties.color-scheme.dark Safari9/19/2019 Firefox1/11/2022845
css.properties.color-scheme.light Safari9/19/2019 Firefox1/11/2022845
css.properties.color-scheme.normal Safari9/19/2019 Firefox1/11/2022845
css.properties.color-scheme.only Safari9/19/2019 Firefox1/11/2022845
css.types.color.hwb πŸ“‹Safari9/20/2021 Firefox1/11/2022113
html.elements.meta.name.color-scheme πŸ“‹Safari3/25/2019 Firefox1/11/20221023

2021/12

API First Browser Date Last Browser Date Days Notes
api.Navigator.storage πŸ“‹Firefox11/14/2017 Safari12/13/20211490
api.StorageManager πŸ“‹Firefox11/14/2017 Safari12/13/20211490
api.StorageManager.persist πŸ“‹Firefox11/14/2017 Safari12/13/20211490
api.StorageManager.persisted πŸ“‹Firefox11/14/2017 Safari12/13/20211490
api.WorkerNavigator.storage πŸ“‹Firefox11/14/2017 Safari12/13/20211490
api.crossOriginIsolated πŸ“‹Firefox1/7/2020 Safari12/13/2021706
http.headers.Cross-Origin-Embedder-Policy πŸ“‹Firefox7/28/2020 Safari12/13/2021503
http.headers.Cross-Origin-Opener-Policy πŸ“‹Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.Atomics πŸ“‹Firefox6/30/2020 Safari12/13/2021531
Safari: Before Safari 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.Safari on iOS: Before Safari on iOS 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.WebView on iOS: Before WebView on iOS 16.4, Atomics is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.
javascript.builtins.Atomics.add πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.and πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.compareExchange πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.exchange πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.isLockFree πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.load πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.notify πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.or πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.store πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.sub πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.wait πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.Atomics.xor πŸ“‹Firefox6/30/2020 Safari12/13/2021531
javascript.builtins.DataView.DataView.sharedarraybuffer_support Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.SharedArrayBuffer πŸ“‹Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.SharedArrayBuffer.@@species πŸ“‹Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer πŸ“‹Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.SharedArrayBuffer.byteLength πŸ“‹Firefox7/28/2020 Safari12/13/2021503
javascript.builtins.SharedArrayBuffer.slice πŸ“‹Firefox7/28/2020 Safari12/13/2021503
webassembly.api.Memory.Memory.shared πŸ“‹Firefox6/30/2020 Safari12/13/2021531
Safari: Shared WebAssembly.Memory is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.Safari on iOS: Shared WebAssembly.Memory is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.WebView on iOS: Shared WebAssembly.Memory is gated behind COOP/COEP. For more detail, read Making your website "cross-origin isolated" using COOP and COEP.
webassembly.threads-and-atomics πŸ“‹Firefox7/28/2020 Safari12/13/2021503
api.HTMLElement.inputMode πŸ“‹Safari3/25/2019 Firefox12/7/2021988
html.global_attributes.inputmode πŸ“‹Safari3/25/2019 Firefox12/7/2021988
Safari on iOS: Before iOS 13, inputmode="none" had no effect.WebView on iOS: Before iOS 13, inputmode="none" had no effect.

2021/11

API First Browser Date Last Browser Date Days Notes
api.Element.attachShadow.options_delegatesFocus_parameter πŸ“‹Safari3/24/2020 Firefox11/2/2021588
api.HTMLElement.enterKeyHint πŸ“‹Safari3/24/2020 Firefox11/2/2021588
api.ShadowRoot.delegatesFocus πŸ“‹Safari9/20/2021 Firefox11/2/202143
css.properties.block-size.fit-content πŸ“‹Safari3/25/2019 Firefox11/2/2021953
css.properties.height.fit-content πŸ“‹Safari9/19/2017 Firefox11/2/20211505
css.properties.inline-size.fit-content πŸ“‹Safari3/25/2019 Firefox11/2/2021953
css.properties.max-block-size.fit-content Safari3/25/2019 Firefox11/2/2021953
css.properties.max-height.fit-content πŸ“‹Safari9/19/2017 Firefox11/2/20211505
Firefox: Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.Firefox for Android: Firefox for Android implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
css.properties.max-inline-size.fit-content Safari3/25/2019 Firefox11/2/2021953
css.properties.max-width.fit-content πŸ“‹Safari9/19/2017 Firefox11/2/20211505
Firefox: Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.Firefox for Android: Firefox for Android implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
css.properties.min-block-size.fit-content Safari3/25/2019 Firefox11/2/2021953
css.properties.min-height.fit-content Safari9/19/2017 Firefox11/2/20211505
Firefox: Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.Firefox for Android: Firefox for Android implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
css.properties.min-inline-size.fit-content Safari3/25/2019 Firefox11/2/2021953
css.properties.min-width.fit-content Safari9/19/2017 Firefox11/2/20211505
Firefox: Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.Firefox for Android: Firefox for Android implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.
css.properties.width.fit-content πŸ“‹Safari9/19/2017 Firefox11/2/20211505
html.global_attributes.enterkeyhint πŸ“‹Safari3/24/2020 Firefox11/2/2021588

2021/10

API First Browser Date Last Browser Date Days Notes
webassembly.bulk-memory-operations πŸ“‹Firefox6/30/2020 Safari10/25/2021482
webassembly.non-trapping-float-to-int-conversions πŸ“‹Firefox12/11/2018 Safari10/25/20211049
webassembly.reference-types πŸ“‹Firefox7/28/2020 Safari10/25/2021454
api.SVGAnimationElement.endEvent_event πŸ“‹Safari9/20/2016 Firefox10/5/20211841
Chrome: The onend event handler property is not supported.Chrome Android: The onend event handler property is not supported.Firefox: The onend event handler property is not supported.Firefox for Android: The onend event handler property is not supported.Opera: The onend event handler property is not supported.Opera Android: The onend event handler property is not supported.Safari: The onend event handler property is not supported.Safari on iOS: The onend event handler property is not supported.Samsung Internet: The onend event handler property is not supported.WebView Android: The onend event handler property is not supported.WebView on iOS: The onend event handler property is not supported.
api.createImageBitmap.options_imageOrientation_parameter Safari9/20/2021 Firefox10/5/202115
css.properties.font-synthesis.small-caps Safari3/27/2017 Firefox10/5/20211653
css.properties.image-rendering.pixelated πŸ“‹Safari9/20/2016 Firefox10/5/20211841
html.elements.input.type_datetime-local πŸ“‹Safari4/26/2021 Firefox10/5/2021162
Firefox: Only displays a date picker without a time picker, see bug 1726107 and bug 1726108.Firefox for Android: Only displays a date picker without a time picker, see bug 1726107 and bug 1726108.Safari: Safari only displays a date picker and does not display a time picker.

2021/9

API First Browser Date Last Browser Date Days Notes
api.AbortSignal.abort_static πŸ“‹Firefox4/19/2021 Safari9/20/2021154
api.CanvasRenderingContext2D.drawImage.ImageBitmap_source_image Firefox11/3/2015 Safari9/20/20212148
api.Crypto.subtle.secure_context_required Firefox4/7/2020 Safari9/20/2021531
api.EXT_color_buffer_float πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.EventTarget.addEventListener.options_parameter.options_signal_parameter πŸ“‹Firefox2/23/2021 Safari9/20/2021209
api.FormDataEvent πŸ“‹Firefox1/7/2020 Safari9/20/2021622
api.FormDataEvent.FormDataEvent πŸ“‹Firefox1/7/2020 Safari9/20/2021622
api.FormDataEvent.formData πŸ“‹Firefox1/7/2020 Safari9/20/2021622
api.HTMLCanvasElement.getContext.webgl2_context Firefox1/24/2017 Safari9/20/20211700
api.HTMLCanvasElement.getContext.webgl2_context.options_alpha_parameter πŸ“‹Firefox6/10/2014 Safari9/20/20212659
api.HTMLCanvasElement.getContext.webgl2_context.options_failIfMajorPerformanceCaveat_parameter πŸ“‹Firefox9/22/2015 Safari9/20/20212190
api.HTMLCanvasElement.getContext.webgl2_context.options_powerPreference_parameter πŸ“‹Firefox10/23/2018 Safari9/20/20211063
Chrome: Chrome respects the GPU hint on macOS only.Chrome Android: Chrome Android respects the GPU hint on macOS only.Edge: Edge respects the GPU hint on macOS only.Firefox: Firefox respects the GPU hint on macOS only.Quest Browser: Quest Browser respects the GPU hint on macOS only.Opera: Opera respects the GPU hint on macOS only.Opera Android: Opera Android respects the GPU hint on macOS only.Samsung Internet: Samsung Internet respects the GPU hint on macOS only.WebView Android: WebView Android respects the GPU hint on macOS only.
api.HTMLElement.focus.options_preventScroll_parameter Firefox7/9/2019 Safari9/20/2021804
api.HTMLFormElement.formdata_event πŸ“‹Firefox1/7/2020 Safari9/20/2021622
api.IDBCursor.request πŸ“‹Firefox6/2/2020 Safari9/20/2021475
api.IDBFactory.open πŸ“‹Firefox1/31/2012 Safari9/20/20213520
Safari: In some releases of Safari 14, the first indexedDB.open() call hangs forever, see bug 226547.Safari on iOS: In some releases of Safari on iOS 14, the first indexedDB.open() call hangs forever, see bug 226547.WebView on iOS: In some releases of WebView on iOS 14, the first indexedDB.open() call hangs forever, see bug 226547.
api.IDBTransaction.commit πŸ“‹Firefox3/10/2020 Safari9/20/2021559
api.ImageBitmap πŸ“‹Firefox11/3/2015 Safari9/20/20212148
api.ImageBitmap.close πŸ“‹Firefox4/26/2016 Safari9/20/20211973
api.ImageBitmap.height πŸ“‹Firefox11/3/2015 Safari9/20/20212148
api.ImageBitmap.width πŸ“‹Firefox11/3/2015 Safari9/20/20212148
api.MediaError.message πŸ“‹Firefox3/7/2017 Safari9/20/20211658
api.MediaSession πŸ“‹Firefox10/20/2020 Safari9/20/2021335
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.metadata πŸ“‹Firefox10/20/2020 Safari9/20/2021335
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.playbackState πŸ“‹Firefox10/20/2020 Safari9/20/2021335
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.setActionHandler πŸ“‹Firefox10/20/2020 Safari9/20/2021335
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.setActionHandler.nexttrack_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.pause_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.play_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.previoustrack_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.seekbackward_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.seekforward_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.seekto_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.skipad_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setActionHandler.stop_type Firefox10/20/2020 Safari9/20/2021335
api.MediaSession.setPositionState πŸ“‹Firefox10/20/2020 Safari9/20/2021335
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.Navigator.mediaSession πŸ“‹Firefox10/20/2020 Safari9/20/2021335
api.Notification.requestPermission_static πŸ“‹Firefox6/25/2013 Safari9/20/20213009
Firefox: From Firefox 70 onwards, cannot be called from a cross-origin iframe.Firefox: From Firefox 72 onwards, can only be called in response to a user gesture such as a click event.Firefox for Android: From Firefox Android 79 onwards, cannot be called from a cross-origin iframe.Firefox for Android: From Firefox Android 79 onwards, can only be called in response to a user gesture such as a click event.Safari: Only supported the deprecated callback syntax.Safari on iOS: The parent Notification interface is undefined unless the page is a web app saved to the home screen. The app's manifest must have a non-default display value.
api.Notification.requestPermission_static.returns_promise Firefox4/26/2016 Safari9/20/20211973
api.Performance.timeOrigin πŸ“‹Firefox4/19/2017 Safari9/20/20211615
api.PerformanceNavigationTiming πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.domComplete πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.domContentLoadedEventEnd πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.domContentLoadedEventStart πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.domInteractive πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.loadEventEnd πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.loadEventStart πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.redirectCount πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.toJSON πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.type πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.unloadEventEnd πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceNavigationTiming.unloadEventStart πŸ“‹Firefox1/23/2018 Safari9/20/20211336
api.PerformanceObserver.takeRecords πŸ“‹Firefox5/9/2018 Safari9/20/20211230
api.RTCRtpSender.getParameters.return_object_property_rtcp πŸ“‹Firefox4/26/2016 Safari9/20/20211973
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpSender.setParameters.parameters_rtcp_parameter πŸ“‹Firefox4/26/2016 Safari9/20/20211973
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.SVGElement.focus.options_preventScroll_parameter Firefox7/9/2019 Safari9/20/2021804
api.SecurityPolicyViolationEvent.disposition πŸ“‹Firefox10/23/2018 Safari9/20/20211063
api.SecurityPolicyViolationEvent.sample πŸ“‹Firefox10/23/2018 Safari9/20/20211063
api.SubmitEvent πŸ“‹Firefox4/7/2020 Safari9/20/2021531
api.SubmitEvent.SubmitEvent πŸ“‹Firefox4/7/2020 Safari9/20/2021531
api.SubtleCrypto.secure_context_required Firefox4/7/2020 Safari9/20/2021531
api.WebGL2RenderingContext πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.activeTexture πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.attachShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.beginQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.beginTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindAttribLocation πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindBuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindBufferBase πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindBufferRange πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindRenderbuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindSampler πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindTexture πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bindVertexArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blendColor πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blendEquation πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blendEquationSeparate πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blendFunc πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blendFuncSeparate πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.blitFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bufferData πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.bufferSubData πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.canvas πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.checkFramebufferStatus πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clear πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearBufferfi πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearBufferfv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearBufferiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearBufferuiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearColor πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearDepth πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clearStencil πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.clientWaitSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.colorMask πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.compileShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.compressedTexImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.compressedTexImage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.compressedTexSubImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.compressedTexSubImage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.copyBufferSubData πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.copyTexImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.copyTexSubImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.copyTexSubImage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createBuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createRenderbuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createSampler πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createTexture πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.createVertexArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.cullFace πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteBuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteRenderbuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteSampler πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteTexture πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.deleteVertexArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.depthFunc πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.depthMask πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.depthRange πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.detachShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.disable πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.disableVertexAttribArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawArrays πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawArraysInstanced πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawBuffers πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawElements πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawElementsInstanced πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawRangeElements πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawingBufferHeight πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.drawingBufferWidth πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.enable πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.enableVertexAttribArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.endQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.endTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.fenceSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.finish πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.flush πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.framebufferRenderbuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.framebufferTexture2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.framebufferTextureLayer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.frontFace πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.generateMipmap πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getActiveAttrib πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getActiveUniform πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getActiveUniformBlockName πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getActiveUniformBlockParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getActiveUniforms πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getAttachedShaders πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getAttribLocation πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getBufferParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getBufferSubData πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getContextAttributes πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getError πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getExtension πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getFragDataLocation πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getFramebufferAttachmentParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getIndexedParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getInternalformatParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getProgramInfoLog πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getProgramParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getQueryParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getRenderbufferParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getSamplerParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getShaderInfoLog πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getShaderParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getShaderPrecisionFormat πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getShaderSource πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getSupportedExtensions πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getSyncParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getTexParameter πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getTransformFeedbackVarying πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getUniform πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getUniformBlockIndex πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getUniformIndices πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getUniformLocation πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getVertexAttrib πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.getVertexAttribOffset πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.hint πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.invalidateFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.invalidateSubFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isBuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isContextLost πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isEnabled πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isFramebuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isRenderbuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isSampler πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isShader πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isTexture πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.isVertexArray πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.lineWidth πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.linkProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.pauseTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.pixelStorei πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.polygonOffset πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.readBuffer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.readPixels πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.renderbufferStorage πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.renderbufferStorageMultisample πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.resumeTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.sampleCoverage πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.samplerParameterf πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.samplerParameteri πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.scissor πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.shaderSource πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilFunc πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilFuncSeparate πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilMask πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilMaskSeparate πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilOp πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.stencilOpSeparate πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGL2RenderingContext.texImage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texParameterf πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texParameteri πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texStorage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texStorage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.texSubImage2D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGL2RenderingContext.texSubImage3D πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.transformFeedbackVaryings πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1i πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1iv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1ui πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform1uiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2i πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2iv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2ui πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform2uiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3i πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3iv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3ui πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform3uiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4i πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4iv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4ui πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniform4uiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformBlockBinding πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix2fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix2x3fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix2x4fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix3fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix3x2fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix3x4fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix4fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix4x2fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.uniformMatrix4x3fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.useProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.validateProgram πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib1f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib1fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib2f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib2fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib3f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib3fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib4f πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttrib4fv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribDivisor πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribI4i πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribI4iv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribI4ui πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribI4uiv πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribIPointer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.vertexAttribPointer πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.viewport πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGL2RenderingContext.waitSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGLQuery πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGLSampler πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGLSync πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGLTransformFeedback πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WebGLVertexArrayObject πŸ“‹Firefox1/24/2017 Safari9/20/20211700
api.WheelEvent.pinch_to_zoom_support Firefox8/8/2017 Safari9/20/20211504
api.XMLHttpRequest.send.body_URLSearchParams_type Firefox1/26/2016 Safari9/20/20212064
Safari: Doesn't send the correct Content-Type header by default. See bug 227477.Safari on iOS: Doesn't send the correct Content-Type header by default. See bug 227477.WebView on iOS: Doesn't send the correct Content-Type header by default. See bug 227477.
api.createImageBitmap πŸ“‹Firefox11/3/2015 Safari9/20/20212148
css.properties.aspect-ratio πŸ“‹Firefox6/1/2021 Safari9/20/2021111
css.properties.aspect-ratio.auto πŸ“‹Firefox6/1/2021 Safari9/20/2021111
css.properties.border-end-end-radius πŸ“‹Firefox3/19/2019 Safari9/20/2021916
css.properties.border-end-start-radius πŸ“‹Firefox3/19/2019 Safari9/20/2021916
css.properties.border-start-end-radius πŸ“‹Firefox3/19/2019 Safari9/20/2021916
css.properties.border-start-start-radius πŸ“‹Firefox3/19/2019 Safari9/20/2021916
css.properties.clear.inline-end πŸ“‹Firefox8/8/2017 Safari9/20/20211504
css.properties.clear.inline-start πŸ“‹Firefox8/8/2017 Safari9/20/20211504
css.properties.display.multi-keyword_values Firefox10/22/2019 Safari9/20/2021699
css.properties.flex.content πŸ“‹Firefox6/26/2018 Safari9/20/20211182
css.properties.float.inline-end πŸ“‹Firefox8/8/2017 Safari9/20/20211504
css.properties.float.inline-start πŸ“‹Firefox8/8/2017 Safari9/20/20211504
css.properties.list-style-type.cjk-decimal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.disclosure-closed πŸ“‹Firefox10/14/2014 Safari9/20/20212533
css.properties.list-style-type.disclosure-open πŸ“‹Firefox10/14/2014 Safari9/20/20212533
css.properties.list-style-type.ethiopic-numeric πŸ“‹Firefox10/14/2014 Safari9/20/20212533
Firefox: Before Firefox 38, Firefox added a dot as suffix of the number for ethiopic-numeric (for example, ፫. instead of ፫). The specification later defined the absence of a suffix, which Firefox 38 followed.Firefox for Android: Before Firefox for Android 38, Firefox for Android added a dot as suffix of the number for ethiopic-numeric (for example, ፫. instead of ፫). The specification later defined the absence of a suffix, which Firefox for Android 38 followed.
css.properties.list-style-type.japanese-formal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.japanese-informal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.korean-hangul-formal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.korean-hanja-formal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.korean-hanja-informal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.simp-chinese-formal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.simp-chinese-informal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.tamil πŸ“‹Firefox10/14/2014 Safari9/20/20212533
css.properties.list-style-type.trad-chinese-formal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.list-style-type.trad-chinese-informal πŸ“‹Firefox3/18/2014 Safari9/20/20212743
css.properties.scroll-margin-block πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-margin-block-end πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-margin-block-start πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-margin-inline πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-margin-inline-end πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-margin-inline-start πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block-end πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block-end.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block-start πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-block-start.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-bottom.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline-end πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline-end.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline-start πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-inline-start.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-left.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-right.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.properties.scroll-padding-top.auto πŸ“‹Firefox7/9/2019 Safari9/20/2021804
css.selectors.any-link.not_match_link Firefox3/23/2021 Safari9/20/2021181
css.selectors.autofill πŸ“‹Firefox2/23/2021 Safari9/20/2021209
Firefox: The :autofill pseudo-class matches autofilled username and password fields, but not other autocompleted fields. See bug 1923525.Firefox: The :-webkit-autofill pseudo-class matches autofilled username and password fields, but not other autocompleted fields. See bug 1923525.Firefox for Android: The :autofill pseudo-class matches autofilled username and password fields, but not other autocompleted fields. See bug 1923525.Firefox for Android: The :-webkit-autofill pseudo-class matches autofilled username and password fields, but not other autocompleted fields. See bug 1923525.
css.selectors.link.not_match_link Firefox3/23/2021 Safari9/20/2021181
css.selectors.visited.not_match_link Firefox3/23/2021 Safari9/20/2021181
css.types.gradient.linear-gradient.premultiplied_gradients Firefox2/24/2015 Safari9/20/20212400
css.types.gradient.radial-gradient.premultiplied_gradients Firefox2/24/2015 Safari9/20/20212400
html.elements.img.aspect_ratio_computed_from_attributes Firefox12/10/2019 Safari9/20/2021650
Safari: Safari doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).Safari on iOS: Safari on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).WebView on iOS: WebView on iOS doesn't preserve space for images without a valid src, which may disrupt layouts that rely on lazy loading (see bug 224197).
http.headers.Referrer-Policy.default_strict-origin-when-cross-origin Firefox3/23/2021 Safari9/20/2021181
javascript.builtins.BigInt64Array πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.BigInt64Array.BigInt64Array πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.BigUint64Array πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.BigUint64Array.BigUint64Array πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.DataView.getBigInt64 πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.DataView.getBigUint64 πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.DataView.setBigInt64 πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.DataView.setBigUint64 πŸ“‹Firefox7/9/2019 Safari9/20/2021804
javascript.builtins.Error.Error.options_cause_parameter πŸ“‹Firefox8/10/2021 Safari9/20/202141
javascript.builtins.Error.cause πŸ“‹Firefox8/10/2021 Safari9/20/202141
Chrome: Before version 125, default console logging for Error objects does not print the cause.Chrome Android: Before version 125, default console logging for Error objects does not print the cause.Edge: Before version 125, default console logging for Error objects does not print the cause.Quest Browser: Before version false, default console logging for Error objects does not print the cause.Opera: Before version 111, default console logging for Error objects does not print the cause.Opera Android: Before version 83, default console logging for Error objects does not print the cause.Safari: Default console logging for Error objects does not print the cause.Safari on iOS: Default console logging for Error objects does not print the cause.Samsung Internet: Before version 27.0, default console logging for Error objects does not print the cause.WebView Android: Before version 125, default console logging for Error objects does not print the cause.WebView on iOS: Default console logging for Error objects does not print the cause.
javascript.builtins.RegExp.hasIndices πŸ“‹Firefox4/19/2021 Safari9/20/2021154
javascript.classes.private_class_fields_in πŸ“‹Firefox7/13/2021 Safari9/20/202169
javascript.classes.private_class_methods πŸ“‹Firefox7/13/2021 Safari9/20/202169
javascript.operators.await.top_level πŸ“‹Firefox6/1/2021 Safari9/20/2021111
Node.js: Not supported in CommonJS modules.Safari: Doesn't support multiple modules simultaneously importing a module containing a top-level await (see bug 242740).Safari on iOS: Doesn't support multiple modules simultaneously importing a module containing a top-level await (see bug 242740).WebView on iOS: Doesn't support multiple modules simultaneously importing a module containing a top-level await (see bug 242740).
webassembly.api.compileStreaming_static πŸ“‹Firefox1/23/2018 Safari9/20/20211336
webassembly.api.instantiateStreaming_static πŸ“‹Firefox1/23/2018 Safari9/20/20211336
css.properties.break-inside.avoid-column Safari9/20/2016 Firefox9/7/20211813
css.properties.break-inside.avoid-page Safari9/20/2016 Firefox9/7/20211813
css.properties.break-inside.multicol_context.avoid-column Safari9/20/2016 Firefox9/7/20211813
css.properties.font-family.system-ui Safari9/19/2017 Firefox9/7/20211449
Firefox: Supported on macOS only.

2021/8

API First Browser Date Last Browser Date Days Notes
api.VisualViewport πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.height πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.offsetLeft πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.offsetTop πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.pageLeft πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.pageTop πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.resize_event πŸ“‹Safari9/19/2019 Firefox8/10/2021691
Chrome: The onresize event handler property is not supported.Chrome Android: The onresize event handler property is not supported.Opera: The onresize event handler property is not supported.Opera Android: The onresize event handler property is not supported.WebView Android: The onresize event handler property is not supported.
api.VisualViewport.scale πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.VisualViewport.scroll_event πŸ“‹Safari9/19/2019 Firefox8/10/2021691
Chrome: The onscroll event handler property is not supported.Chrome Android: The onscroll event handler property is not supported.Opera: The onscroll event handler property is not supported.Opera Android: The onscroll event handler property is not supported.WebView Android: The onscroll event handler property is not supported.
api.VisualViewport.width πŸ“‹Safari9/19/2019 Firefox8/10/2021691
api.Window.visualViewport πŸ“‹Safari9/19/2019 Firefox8/10/2021691
css.properties.tab-size πŸ“‹Safari10/22/2013 Firefox8/10/20212849
Chrome: This property is not yet animatable.Chrome Android: This property is not yet animatable.Edge: This property is not yet animatable.Firefox: Before Firefox 53, this property was not animatable.Firefox for Android: Before Firefox for Android 53, this property was not animatable.Quest Browser: This property is not yet animatable.Samsung Internet: This property is not yet animatable.
javascript.builtins.Intl.DateTimeFormat.formatRange πŸ“‹Safari4/26/2021 Firefox8/10/2021106
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.formatRangeToParts πŸ“‹Safari4/26/2021 Firefox8/10/2021106
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.

2021/7

API First Browser Date Last Browser Date Days Notes
api.WheelEvent.wheelDelta Safari10/26/2007 Firefox7/13/20215009
api.WheelEvent.wheelDeltaX Safari10/26/2007 Firefox7/13/20215009
api.WheelEvent.wheelDeltaY Safari10/26/2007 Firefox7/13/20215009
css.properties.scroll-margin πŸ“‹Safari4/26/2021 Firefox7/13/202178
Firefox: The scroll-margin property can cause an element's visibility to be incorrectly calculated for element.focus(). See bug 1708303.Firefox for Android: The scroll-margin property can cause an element's visibility to be incorrectly calculated for element.focus(). See bug 1708303.Safari: Before version 14.1, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.Safari on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.WebView on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dayPeriod_parameter Safari4/26/2021 Firefox7/13/202178
javascript.classes.private_class_fields πŸ“‹Safari4/26/2021 Firefox7/13/202178

2021/4

API First Browser Date Last Browser Date Days Notes
api.AbstractRange πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AbstractRange.collapsed πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AbstractRange.endContainer πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AbstractRange.endOffset πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AbstractRange.startContainer πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AbstractRange.startOffset πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.AnalyserNode.AnalyserNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.AnalyserNode.getFloatTimeDomainData πŸ“‹Firefox6/10/2014 Safari4/26/20212512
api.AudioBuffer.AudioBuffer πŸ“‹Firefox4/19/2017 Safari4/26/20211468
Chrome: The context parameter was supported up until version 57, but has now been removed.Chrome Android: The context parameter was supported up until version 57, but has now been removed.Quest Browser: The context parameter was supported up until version 5.0, but has now been removed.Opera: The context parameter was supported up until version 44, but has now been removed.Opera Android: The context parameter was supported up until version 44, but has now been removed.Samsung Internet: The context parameter was supported up until Samsung Internet 7.0, but has now been removed.WebView Android: The context parameter was supported up until version 57, but has now been removed.
api.AudioBuffer.copyFromChannel πŸ“‹Firefox2/4/2014 Safari4/26/20212638
api.AudioBuffer.copyToChannel πŸ“‹Firefox2/4/2014 Safari4/26/20212638
api.AudioBufferSourceNode.AudioBufferSourceNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.AudioBufferSourceNode.detune πŸ“‹Firefox8/11/2015 Safari4/26/20212085
api.AudioContext πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.AudioContext.AudioContext πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Chrome: Before Chrome 66, each tab is limited to 6 audio contexts in Chrome; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Chrome.Chrome: If latencyHint isn't valid, Chrome throws a TypeError exception. See Non-standard exceptions in Chrome for details.Chrome Android: Before Chrome Android 66, each tab is limited to 6 audio contexts in Chrome Android; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Chrome Android.Chrome Android: If latencyHint isn't valid, Chrome Android throws a TypeError exception. See Non-standard exceptions in Chrome Android for details.Quest Browser: Before Quest Browser 5.0, each tab is limited to 6 audio contexts in Quest Browser; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Quest Browser.Quest Browser: If latencyHint isn't valid, Quest Browser throws a TypeError exception. See Non-standard exceptions in Quest Browser for details.Opera: Before Opera 53, each tab is limited to 6 audio contexts in Opera; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Chrome.Opera: If latencyHint isn't valid, Opera throws a TypeError exception. See Non-standard exceptions in Chrome for details.Opera Android: Before Opera Android 47, each tab is limited to 6 audio contexts in Opera; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Chrome.Opera Android: If latencyHint isn't valid, Opera throws a TypeError exception. See Non-standard exceptions in Chrome for details.Safari: New audio contexts are suspended until the resume() method is called via user action, such as the click event.Safari on iOS: New audio contexts are suspended until the resume() method is called via user action, such as the click event.Samsung Internet: Before Samsung Internet 9.0, each tab is limited to 6 audio contexts in Samsung Internet; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in Chrome.Samsung Internet: If latencyHint isn't valid, Samsung Internet throws a TypeError exception. See Non-standard exceptions in Chrome for details.WebView Android: Before WebView Android 66, each tab is limited to 6 audio contexts in WebView Android; attempting to create more will throw a DOMException. For details see Per-tab audio context limitation in WebView Android.WebView Android: If latencyHint isn't valid, WebView Android throws a TypeError exception. See Non-standard exceptions in WebView Android for details.WebView on iOS: New audio contexts are suspended until the resume() method is called via user action, such as the click event.
api.AudioContext.AudioContext.options_sampleRate_parameter πŸ“‹Firefox6/26/2018 Safari4/26/20211035
api.AudioContext.baseLatency πŸ“‹Firefox10/22/2019 Safari4/26/2021552
api.AudioContext.getOutputTimestamp πŸ“‹Firefox10/22/2019 Safari4/26/2021552
api.AudioDestinationNode.maxChannelCount πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Safari: This property always returns 0.Safari on iOS: This property always returns 0.WebView on iOS: This property always returns 0.
api.AudioParamMap πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.@@iterator Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.entries Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.forEach Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.get Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.has Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.keys Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.size Firefox5/5/2020 Safari4/26/2021356
api.AudioParamMap.values Firefox5/5/2020 Safari4/26/2021356
api.AudioWorklet πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletGlobalScope πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletGlobalScope.currentFrame πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletGlobalScope.currentTime πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletGlobalScope.registerProcessor πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletGlobalScope.sampleRate πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletNode πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletNode.AudioWorkletNode πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletNode.parameters πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletNode.port πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletNode.processorerror_event πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletProcessor πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletProcessor.AudioWorkletProcessor πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.AudioWorkletProcessor.port πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.BaseAudioContext πŸ“‹Firefox4/19/2017 Safari4/26/20211468
Chrome: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Chrome Android: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Edge: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Firefox: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Firefox for Android: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Opera: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Opera Android: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Safari: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Safari on iOS: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.Samsung Internet: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.WebView Android: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.WebView on iOS: The BaseAudioContext interface itself is not present, but many of the methods are available on the AudioContext and OfflineAudioContext interfaces.
api.BaseAudioContext.audioWorklet πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.BaseAudioContext.createConstantSource πŸ“‹Firefox3/7/2017 Safari4/26/20211511
api.BaseAudioContext.createIIRFilter πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.BaseAudioContext.createPeriodicWave.constraints_disableNormalization_parameter Firefox9/20/2016 Safari4/26/20211679
api.BaseAudioContext.createStereoPanner πŸ“‹Firefox3/31/2015 Safari4/26/20212218
api.BaseAudioContext.decodeAudioData.returns_promise Firefox2/24/2015 Safari4/26/20212253
api.BiquadFilterNode.BiquadFilterNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.Blob.stream πŸ“‹Firefox9/3/2019 Safari4/26/2021601
api.CSSConditionRule πŸ“‹Firefox4/2/2013 Safari4/26/20212946
api.CSSConditionRule.conditionText πŸ“‹Firefox4/2/2013 Safari4/26/20212946
api.CSSGroupingRule πŸ“‹Firefox4/2/2013 Safari4/26/20212946
Safari: The CSSGroupingRule interface itself is not present, but many of the methods are available on various interfaces such as the CSSMediaRule and CSSPageRule interfaces.Safari on iOS: The CSSGroupingRule interface itself is not present, but many of the methods are available on various interfaces such as the CSSMediaRule and CSSPageRule interfaces.WebView on iOS: The CSSGroupingRule interface itself is not present, but many of the methods are available on various interfaces such as the CSSMediaRule and CSSPageRule interfaces.
api.ChannelMergerNode.ChannelMergerNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.ChannelSplitterNode.ChannelSplitterNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.ConstantSourceNode πŸ“‹Firefox3/7/2017 Safari4/26/20211511
api.ConstantSourceNode.ConstantSourceNode πŸ“‹Firefox3/7/2017 Safari4/26/20211511
api.ConstantSourceNode.offset πŸ“‹Firefox3/7/2017 Safari4/26/20211511
api.ConvolverNode.ConvolverNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.DataTransfer.DataTransfer πŸ“‹Firefox9/5/2018 Safari4/26/2021964
api.DelayNode.DelayNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.Document.visibilitychange_event πŸ“‹Firefox9/28/2017 Safari4/26/20211306
Chrome: The onvisibilitychange event handler property is not supported.Chrome: The onvisibilitychange event handler property is not supported.Chrome Android: The onvisibilitychange event handler property is not supported.Chrome Android: The onvisibilitychange event handler property is not supported.Edge: The onvisibilitychange event handler property is not supported.Internet Explorer: The onvisibilitychange event handler property is not supported.Quest Browser: The onvisibilitychange event handler property is not supported.Opera: The onvisibilitychange event handler property is not supported.Opera: The onvisibilitychange event handler property is not supported.Opera: The onvisibilitychange event handler property is not supported.Opera Android: The onvisibilitychange event handler property is not supported.Opera Android: The onvisibilitychange event handler property is not supported.Opera Android: The onvisibilitychange event handler property is not supported.Safari: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari: Before Safari 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.Safari: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari: Before Safari 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.Safari: The onvisibilitychange event handler property is not supported.Safari on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari on iOS: Before Safari on iOS 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.Safari on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.Safari on iOS: Before Safari on iOS 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.Safari on iOS: The onvisibilitychange event handler property is not supported.Samsung Internet: The onvisibilitychange event handler property is not supported.Samsung Internet: The onvisibilitychange event handler property is not supported.WebView Android: The onvisibilitychange event handler property is not supported.WebView Android: The onvisibilitychange event handler property is not supported.WebView on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.WebView on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.WebView on iOS: Before WebView on iOS 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.WebView on iOS: Doesn't fire the visibilitychange event when navigating away from a document, so also include code to check for the pagehide event (which does fire for that case in all current browsers). See bug 116769, bug 151234, bug 151610, and bug 194897.WebView on iOS: Before WebView on iOS 14, the event does not bubble, so document.addEventListener('visibilitychange', ...) works, but window.addEventListener('visibilitychange', ...) does not.WebView on iOS: The onvisibilitychange event handler property is not supported.
api.DynamicsCompressorNode.DynamicsCompressorNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.EXT_float_blend πŸ“‹Firefox5/21/2019 Safari4/26/2021706
Chrome Android: Until Chrome 77, this extension was unavailable on several Android devices powered by GLES 3.2. See bug 41459397.Quest Browser: Until Chrome 77, this extension was unavailable on several Android devices powered by GLES 3.2. See bug 41459397.
api.EXT_texture_compression_rgtc πŸ“‹Firefox1/29/2019 Safari4/26/2021818
Chrome: Only supported on macOS.Edge: Only supported on macOS.Firefox: Only supported on macOS.Opera: Only supported on macOS.
api.GainNode.GainNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.HTMLAreaElement.referrerPolicy πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.HTMLLinkElement.referrerPolicy πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.IIRFilterNode πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.IIRFilterNode.IIRFilterNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.IIRFilterNode.getFrequencyResponse πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.MediaElementAudioSourceNode.MediaElementAudioSourceNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.MediaRecorder πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Firefox: Before Firefox 58, using MediaStream.addTrack() on a stream obtained using getUserMedia(), then attempting to record the resulting stream would result in only recording the original stream without the added tracks (severe bug).Firefox for Android: Before Firefox for Android 58, using MediaStream.addTrack() on a stream obtained using getUserMedia(), then attempting to record the resulting stream would result in only recording the original stream without the added tracks (severe bug).
api.MediaRecorder.MediaRecorder πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.MediaRecorder.options_parameter Firefox12/15/2015 Safari4/26/20211959
api.MediaRecorder.audioBitsPerSecond πŸ“‹Firefox12/10/2019 Safari4/26/2021503
api.MediaRecorder.dataavailable_event πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.error_event πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Chrome: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Chrome Android: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Edge: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Quest Browser: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Opera: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Opera Android: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.Samsung Internet: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.WebView Android: The interface for this event is a plain Event, not ErrorEvent. See bug 40791876.
api.MediaRecorder.isTypeSupported_static πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.mimeType πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Chrome: Before Chrome 49, only video is supported, not audio.Chrome Android: Before Chrome Android 49, only video is supported, not audio.Firefox: Starting with Firefox 71, the behavior of mimeType is more consistent. For example, it now returns the media type even after recording has stopped.WebView Android: Before WebView Android 49, only video is supported, not audio.
api.MediaRecorder.pause πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.pause_event πŸ“‹Firefox1/29/2019 Safari4/26/2021818
api.MediaRecorder.requestData πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.resume πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.resume_event πŸ“‹Firefox1/29/2019 Safari4/26/2021818
api.MediaRecorder.start πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.start_event πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.state πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Chrome: Before Chrome 49, only video is supported, not audio.Chrome Android: Before Chrome Android 49, only video is supported, not audio.WebView Android: Before WebView Android 49, only video is supported, not audio.
api.MediaRecorder.stop πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.stop_event πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.MediaRecorder.stream πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Chrome: Before Chrome 49, only video is supported, not audio.Chrome Android: Before Chrome Android 49, only video is supported, not audio.
api.MediaRecorder.videoBitsPerSecond πŸ“‹Firefox12/10/2019 Safari4/26/2021503
api.MediaStreamAudioDestinationNode.MediaStreamAudioDestinationNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.MediaStreamAudioSourceNode.MediaStreamAudioSourceNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.OES_fbo_render_mipmap πŸ“‹Firefox12/10/2019 Safari4/26/2021503
api.OfflineAudioContext πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.OfflineAudioContext.OfflineAudioContext πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.OfflineAudioContext.OfflineAudioContext.options_parameter Firefox11/14/2017 Safari4/26/20211259
api.OfflineAudioContext.length πŸ“‹Firefox9/20/2016 Safari4/26/20211679
api.OfflineAudioContext.startRendering.returns_promise Firefox3/31/2015 Safari4/26/20212218
api.OscillatorNode.OscillatorNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.PannerNode.PannerNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.PannerNode.orientationX πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.PannerNode.orientationY πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.PannerNode.orientationZ πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.PannerNode.positionX πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.PannerNode.positionY πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.PannerNode.positionZ πŸ“‹Firefox11/15/2016 Safari4/26/20211623
api.Performance.toJSON πŸ“‹Firefox10/29/2013 Safari4/26/20212736
api.PerformanceNavigation.toJSON πŸ“‹Firefox10/29/2013 Safari4/26/20212736
Firefox: Before Firefox 70, this property could return incorrect values. See bug 1459711.Firefox for Android: Before Firefox for Android 79, this property could return incorrect values. See bug 1459711.
api.PerformancePaintTiming πŸ“‹Firefox12/15/2020 Safari4/26/2021132
api.PerformancePaintTiming.first-contentful-paint πŸ“‹Firefox12/15/2020 Safari4/26/2021132
api.PerformancePaintTiming.toJSON πŸ“‹Firefox12/15/2020 Safari4/26/2021132
api.PeriodicWave.PeriodicWave πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.RTCIceCandidate.usernameFragment πŸ“‹Firefox5/21/2019 Safari4/26/2021706
Firefox: Before Firefox 126, the property was not read-only.Firefox for Android: Before Firefox for Android 126, the property was not read-only.
api.RTCPeerConnection.restartIce πŸ“‹Firefox10/22/2019 Safari4/26/2021552
api.RTCPeerConnection.setLocalDescription.description_parameter_optional Firefox4/7/2020 Safari4/26/2021384
api.RTCStatsReport.type_remote-inbound-rtp.id πŸ“‹Firefox1/7/2020 Safari4/26/2021475
api.RTCStatsReport.type_remote-inbound-rtp.localId πŸ“‹Firefox1/7/2020 Safari4/26/2021475
api.RTCStatsReport.type_remote-inbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Safari4/26/2021475
api.RTCStatsReport.type_remote-inbound-rtp.type πŸ“‹Firefox1/7/2020 Safari4/26/2021475
api.Request.formData πŸ“‹Firefox7/2/2015 Safari4/26/20212125
Safari: The method exists but always rejects with NotSupportedError. See bug 215671.Safari on iOS: The method exists but always rejects with NotSupportedError. See bug 215671.WebView on iOS: The method exists but always rejects with NotSupportedError. See bug 215671.
api.Response.formData πŸ“‹Firefox7/2/2015 Safari4/26/20212125
Safari: The method exists but always rejects with NotSupportedError. See bug 215671.Safari on iOS: The method exists but always rejects with NotSupportedError. See bug 215671.WebView on iOS: The method exists but always rejects with NotSupportedError. See bug 215671.
api.StereoPannerNode πŸ“‹Firefox3/31/2015 Safari4/26/20212218
api.StereoPannerNode.StereoPannerNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.StereoPannerNode.pan πŸ“‹Firefox3/31/2015 Safari4/26/20212218
api.TextEncoder.encodeInto πŸ“‹Firefox3/19/2019 Safari4/26/2021769
api.URL.URL πŸ“‹Firefox12/10/2013 Safari4/26/20212694
Edge: Before Edge 79, query arguments in the base URL argument are removed when calling the URL constructor.Firefox: Before version 122, host, hostname, and port were not parsed for unknown protocols/schemes.Firefox for Android: Before version 122, host, hostname, and port were not parsed for unknown protocols/schemes.Safari: Before Safari 14.1, calling the URL constructor with a base URL whose value is undefined caused Safari to throw a TypeError, see bug 216841.Safari on iOS: Before Safari on iOS 14.1, calling the URL constructor with a base URL whose value is undefined caused Safari on iOS to throw a TypeError, see bug 216841.WebView on iOS: Before WebView on iOS 14.1, calling the URL constructor with a base URL whose value is undefined caused WebView on iOS to throw a TypeError, see bug 216841.
api.VTTCue.lineAlign πŸ“‹Firefox7/22/2014 Safari4/26/20212470
api.VTTCue.positionAlign πŸ“‹Firefox7/22/2014 Safari4/26/20212470
api.VTTCue.region πŸ“‹Firefox3/13/2018 Safari4/26/20211140
api.WEBGL_compressed_texture_s3tc_srgb πŸ“‹Firefox8/8/2017 Safari4/26/20211357
api.WaveShaperNode.WaveShaperNode πŸ“‹Firefox4/19/2017 Safari4/26/20211468
api.Worklet πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.Worklet.addModule πŸ“‹Firefox5/5/2020 Safari4/26/2021356
api.WorkletGlobalScope πŸ“‹Firefox5/5/2020 Safari4/26/2021356
css.at-rules.supports.selector Firefox9/3/2019 Safari4/26/2021601
css.properties.border-block πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.currentColor πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.dashed πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.dotted πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.double πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.groove πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.hidden πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.inset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.medium πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.none πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.outset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.ridge πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.solid πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.thick πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.thin πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block.transparent πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-color πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-color.currentColor πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-color.transparent πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.dashed πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.dotted πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.double πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.groove πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.hidden πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.inset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.none πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.outset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.ridge πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-style.solid πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-width πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-width.medium πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-width.thick πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-block-width.thin πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.currentColor πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.dashed πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.dotted πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.double πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.groove πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.hidden πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.inset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.medium πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.none πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.outset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.ridge πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.solid πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.thick πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.thin πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline.transparent πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-color πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-color.currentColor πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-color.transparent πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.dashed πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.dotted πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.double πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.groove πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.hidden πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.inset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.none πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.outset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.ridge πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-style.solid πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-width πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-width.medium πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-width.thick πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.border-inline-width.thin πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.column-gap.flex_context πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.gap.flex_context πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.gap.multicol_context πŸ“‹Firefox6/26/2018 Safari4/26/20211035
css.properties.inset πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.inset.auto πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.inset-block πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-block.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.inset-block-end πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-block-end.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.inset-block-start πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-block-start.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.inset-inline πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-inline.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.inset-inline-end πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-inline-end.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.inset-inline-start πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.inset-inline-start.auto πŸ“‹Firefox9/22/2015 Safari4/26/20212043
css.properties.list-style-type.string Firefox7/2/2015 Safari4/26/20212125
css.properties.margin-block πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.margin-block.auto πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.margin-inline πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.margin-inline.auto πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.padding-block πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.padding-inline πŸ“‹Firefox3/19/2019 Safari4/26/2021769
css.properties.quotes.auto πŸ“‹Firefox10/22/2019 Safari4/26/2021552
Internet Explorer: This value is not supported, but the default browser behavior is to choose appropriate quotes for the user's language setting
css.properties.rotate πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.properties.rotate.none πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.properties.rotate.x_y_z_angle Firefox1/7/2020 Safari4/26/2021475
css.properties.row-gap.flex_context πŸ“‹Firefox10/23/2018 Safari4/26/2021916
css.properties.scale πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.properties.scale.none πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.properties.scroll-margin-bottom πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Before version 14.1, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.Safari on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.WebView on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.
css.properties.scroll-margin-left πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Before version 14.1, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.Safari on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.WebView on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.
css.properties.scroll-margin-right πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Before version 14.1, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.Safari on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.WebView on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.
css.properties.scroll-margin-top πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Before version 14.1, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.Safari on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.WebView on iOS: Before version 14.5, scroll margin is not applied for scrolls to fragment target or scrollIntoView(), see bug 189265.
css.properties.scroll-padding πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.Safari on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.WebView on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.
css.properties.scroll-padding-bottom πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.Safari on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.WebView on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.
css.properties.scroll-padding-left πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.Safari on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.WebView on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.
css.properties.scroll-padding-right πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.Safari on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.WebView on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.
css.properties.scroll-padding-top πŸ“‹Firefox7/9/2019 Safari4/26/2021657
Safari: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.Safari on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.WebView on iOS: Scroll padding is not applied for scrolls to fragment target or scrollIntoView(), see bug 179379.
css.properties.translate πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.properties.translate.none πŸ“‹Firefox1/7/2020 Safari4/26/2021475
css.selectors.file-selector-button πŸ“‹Firefox10/20/2020 Safari4/26/2021188
css.selectors.marker.animation_and_transition_support Firefox8/25/2020 Safari4/26/2021244
html.elements.input.type_date πŸ“‹Firefox11/14/2017 Safari4/26/20211259
html.elements.input.type_date.disables_invalid_values_in_picker_ui Firefox11/14/2017 Safari4/26/20211259
html.elements.input.type_time πŸ“‹Firefox11/14/2017 Safari4/26/20211259
javascript.builtins.FinalizationRegistry πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.FinalizationRegistry.FinalizationRegistry πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.FinalizationRegistry.register πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.FinalizationRegistry.unregister πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.Intl.Collator.Collator.options_collation_parameter Firefox1/26/2021 Safari4/26/202190
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.IntlLegacyConstructedSymbol πŸ“‹Firefox6/13/2017 Safari4/26/20211413
Chrome: The fallback symbol property has description IntlFallback.Chrome Android: The fallback symbol property has description IntlFallback.Edge: The fallback symbol property has description IntlFallback.Node.js: The fallback symbol property has description IntlFallback.Quest Browser: The fallback symbol property has description IntlFallback.Opera: The fallback symbol property has description IntlFallback.Opera Android: The fallback symbol property has description IntlFallback.Samsung Internet: The fallback symbol property has description IntlFallback.WebView Android: The fallback symbol property has description IntlFallback.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_calendar_parameter Firefox5/5/2020 Safari4/26/2021356
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dateStyle_parameter Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_fractionalSecondDigits_parameter Firefox12/15/2020 Safari4/26/2021132
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_numberingSystem_parameter Firefox5/5/2020 Safari4/26/2021356
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeStyle_parameter Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.Intl.DisplayNames πŸ“‹Firefox2/23/2021 Safari4/26/202162
javascript.builtins.Intl.DisplayNames.DisplayNames πŸ“‹Firefox2/23/2021 Safari4/26/202162
javascript.builtins.Intl.DisplayNames.of πŸ“‹Firefox2/23/2021 Safari4/26/202162
javascript.builtins.Intl.DisplayNames.resolvedOptions πŸ“‹Firefox2/23/2021 Safari4/26/202162
javascript.builtins.Intl.DisplayNames.supportedLocalesOf πŸ“‹Firefox2/23/2021 Safari4/26/202162
javascript.builtins.Intl.ListFormat πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.ListFormat πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the ListFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.format πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.formatToParts πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.resolvedOptions πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.ListFormat.supportedLocalesOf πŸ“‹Firefox6/30/2020 Safari4/26/2021300
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.Safari: Only available on macOS Big Sur (11) and above.
javascript.builtins.Intl.NumberFormat.NumberFormat.IntlLegacyConstructedSymbol πŸ“‹Firefox6/13/2017 Safari4/26/20211413
Chrome: The fallback symbol property has description IntlFallback.Chrome Android: The fallback symbol property has description IntlFallback.Edge: The fallback symbol property has description IntlFallback.Node.js: The fallback symbol property has description IntlFallback.Quest Browser: The fallback symbol property has description IntlFallback.Opera: The fallback symbol property has description IntlFallback.Opera Android: The fallback symbol property has description IntlFallback.Samsung Internet: The fallback symbol property has description IntlFallback.WebView Android: The fallback symbol property has description IntlFallback.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_compactDisplay_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencyDisplay_parameter Firefox11/3/2015 Safari4/26/20212001
Safari: Doesn't support currencyDisplay: 'narrowSymbol'.Safari on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.WebView on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencySign_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_notation_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_numberingSystem_parameter Firefox5/5/2020 Safari4/26/2021356
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unitDisplay_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unit_parameter Firefox6/30/2020 Safari4/26/2021300
javascript.builtins.WeakRef πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.WeakRef.WeakRef πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.builtins.WeakRef.deref πŸ“‹Firefox7/28/2020 Safari4/26/2021272
javascript.classes.static.class_fields πŸ“‹Firefox4/7/2020 Safari4/26/2021384
javascript.statements.export.arbitrary_module_namespace_identifier_names Firefox3/23/2021 Safari4/26/202134
javascript.statements.export.namespace πŸ“‹Firefox8/25/2020 Safari4/26/2021244
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.import.arbitrary_module_namespace_identifier_names Firefox3/23/2021 Safari4/26/202134
webassembly.BigInt-to-i64-integration πŸ“‹Firefox6/30/2020 Safari4/26/2021300
webassembly.sign-extension-operations πŸ“‹Firefox9/5/2018 Safari4/26/2021964

2021/3

API First Browser Date Last Browser Date Days Notes
api.Element.beforeinput_event πŸ“‹Safari3/27/2017 Firefox3/23/20211457
api.InputEvent.getTargetRanges πŸ“‹Safari3/27/2017 Firefox3/23/20211457
api.MediaSource.sourceclose_event πŸ“‹Safari3/27/2017 Firefox3/23/20211457
Chrome: The onsourceclose event handler property is not supported.Chrome Android: The onsourceclose event handler property is not supported.Edge: The onsourceclose event handler property is not supported.Firefox: The onsourceclose event handler property is not supported.Firefox for Android: The onsourceclose event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onsourceclose event handler property is not supported.Opera Android: The onsourceclose event handler property is not supported.Safari: The onsourceclose event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onsourceclose event handler property is not supported.WebView Android: The onsourceclose event handler property is not supported.
http.headers.Content-Length.cors_response_safelist Safari3/25/2019 Firefox3/23/2021729

2021/1

API First Browser Date Last Browser Date Days Notes
css.properties.touch-action.pinch-zoom Safari9/19/2019 Firefox1/26/2021495
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.Firefox for Android: Not applicable to Firefox for Android platforms that support neither pointer nor touch events.
html.elements.link.rel.preload πŸ“‹Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-fetch Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-font Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-image Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-script Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).
html.elements.link.rel.preload.as-style Safari4/12/2018 Firefox1/26/20211020
Firefox: Disabled due to various web compatibility issues (e.g. bug 1405761).Firefox for Android: Disabled due to various web compatibility issues (e.g. bug 1405761).

2020/12

API First Browser Date Last Browser Date Days Notes
css.selectors.not.selector_list Safari9/30/2015 Firefox12/15/20201903

2020/11

API First Browser Date Last Browser Date Days Notes
css.types.gradient.conic-gradient πŸ“‹Safari3/25/2019 Firefox11/17/2020603
css.types.gradient.conic-gradient.doubleposition Safari3/25/2019 Firefox11/17/2020603
css.types.gradient.repeating-conic-gradient πŸ“‹Safari3/25/2019 Firefox11/17/2020603

2020/10

API First Browser Date Last Browser Date Days Notes
api.MediaMetadata πŸ“‹Safari9/16/2020 Firefox10/20/202034
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaMetadata.MediaMetadata πŸ“‹Safari9/16/2020 Firefox10/20/202034
api.MediaMetadata.album πŸ“‹Safari9/16/2020 Firefox10/20/202034
api.MediaMetadata.artist πŸ“‹Safari9/16/2020 Firefox10/20/202034
api.MediaMetadata.artwork πŸ“‹Safari9/16/2020 Firefox10/20/202034
api.MediaMetadata.title πŸ“‹Safari9/16/2020 Firefox10/20/202034
css.selectors.is.forgiving_selector_list Safari9/16/2020 Firefox10/20/202034
css.selectors.where.forgiving_selector_list Safari9/16/2020 Firefox10/20/202034

2020/9

API First Browser Date Last Browser Date Days Notes
css.properties.flex-direction.column-reverse πŸ“‹Safari10/22/2013 Firefox9/22/20202527
Firefox: Before Firefox 81, overflow with column-reverse was unsupported. See bug 1042151.Firefox for Android: Before Firefox for Android 81, overflow with column-reverse was unsupported. See bug 1042151.
css.properties.flex-direction.row-reverse πŸ“‹Safari10/22/2013 Firefox9/22/20202527
Firefox: Before Firefox 81, overflow with column-reverse was unsupported. See bug 1042151.Firefox for Android: Before Firefox for Android 81, overflow with column-reverse was unsupported. See bug 1042151.
api.AudioScheduledSourceNode πŸ“‹Firefox4/19/2017 Safari9/16/20201246
Chrome: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Chrome Android: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Edge: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Firefox: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Firefox for Android: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Opera: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Opera Android: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Safari: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Safari on iOS: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.Samsung Internet: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.WebView Android: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.WebView on iOS: The AudioScheduledSourceNode interface itself is not present, but some of its members are available on the AudioBufferSourceNode, ConstantSourceNode and OscillatorNode interfaces.
api.Blob.arrayBuffer πŸ“‹Firefox9/3/2019 Safari9/16/2020379
api.Blob.text πŸ“‹Firefox9/3/2019 Safari9/16/2020379
api.BlobEvent πŸ“‹Firefox5/14/2013 Safari9/16/20202682
api.BlobEvent.BlobEvent πŸ“‹Firefox5/14/2013 Safari9/16/20202682
api.BlobEvent.data πŸ“‹Firefox5/14/2013 Safari9/16/20202682
api.Document.getAnimations πŸ“‹Firefox4/7/2020 Safari9/16/2020162
Safari: Implements an older version of the specification, see bug 179536.Safari on iOS: Implements an older version of the specification, see bug 179536.WebView on iOS: Implements an older version of the specification, see bug 179536.
api.Document.replaceChildren πŸ“‹Firefox6/30/2020 Safari9/16/202078
api.DocumentFragment.replaceChildren πŸ“‹Firefox6/30/2020 Safari9/16/202078
api.DragEvent πŸ“‹Firefox6/30/2009 Safari9/16/20204096
Internet Explorer: Before Internet Explorer 10, DragEvent is exposed in standards mode but not quirks mode.
api.DragEvent.DragEvent πŸ“‹Firefox6/30/2009 Safari9/16/20204096
api.DragEvent.dataTransfer πŸ“‹Firefox6/30/2009 Safari9/16/20204096
Internet Explorer: The value is always null.
api.EXT_color_buffer_half_float πŸ“‹Firefox6/7/2016 Safari9/16/20201562
Firefox: Not supported on Windows.
api.Element.animate.options_pseudoElement_parameter πŸ“‹Firefox4/7/2020 Safari9/16/2020162
api.Element.replaceChildren πŸ“‹Firefox6/30/2020 Safari9/16/202078
api.Element.scroll.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
api.Element.scrollBy.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
api.Element.scrollIntoView.options_parameter πŸ“‹Firefox2/24/2015 Safari9/16/20202031
api.Element.scrollIntoView.options_parameter.block_option πŸ“‹Firefox1/23/2018 Safari9/16/2020967
Firefox: Only values "top" and "bottom", not "nearest" and "center".Firefox for Android: Only values "top" and "bottom", not "nearest" and "center".
api.Element.scrollIntoView.options_parameter.inline_option πŸ“‹Firefox1/23/2018 Safari9/16/2020967
api.Element.scrollTo.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
api.EventTarget.EventTarget πŸ“‹Firefox3/13/2018 Safari9/16/2020918
api.HTMLAnchorElement.referrerPolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
api.HTMLElement.accessKeyLabel πŸ“‹Firefox11/8/2011 Safari9/16/20203235
api.HTMLIFrameElement.referrerPolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
api.HTMLImageElement.referrerPolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
api.HTMLScriptElement.referrerPolicy πŸ“‹Firefox1/29/2019 Safari9/16/2020596
api.IntersectionObserver.IntersectionObserver.options_root_parameter_Document Firefox5/5/2020 Safari9/16/2020134
api.KeyframeEffect.pseudoElement πŸ“‹Firefox4/7/2020 Safari9/16/2020162
api.MediaQueryList.EventTarget_inheritance Firefox8/8/2017 Safari9/16/20201135
api.MediaQueryList.change_event πŸ“‹Firefox8/8/2017 Safari9/16/20201135
api.MediaQueryListEvent πŸ“‹Firefox8/8/2017 Safari9/16/20201135
api.MediaQueryListEvent.MediaQueryListEvent πŸ“‹Firefox8/8/2017 Safari9/16/20201135
api.MediaQueryListEvent.matches πŸ“‹Firefox8/8/2017 Safari9/16/20201135
api.MediaQueryListEvent.media πŸ“‹Firefox8/8/2017 Safari9/16/20201135
api.MediaRecorderErrorEvent Firefox11/14/2017 Safari9/16/20201037
api.MediaRecorderErrorEvent.MediaRecorderErrorEvent Firefox11/14/2017 Safari9/16/20201037
api.MediaRecorderErrorEvent.error Firefox11/14/2017 Safari9/16/20201037
api.Navigator.share.data_text_parameter πŸ“‹Firefox12/10/2019 Safari9/16/2020281
api.OfflineAudioCompletionEvent.OfflineAudioCompletionEvent πŸ“‹Firefox4/19/2017 Safari9/16/20201246
api.RTCStatsReport.type_inbound-rtp.kind πŸ“‹Firefox10/23/2018 Safari9/16/2020694
api.RTCStatsReport.type_outbound-rtp.kind πŸ“‹Firefox10/23/2018 Safari9/16/2020694
api.RTCStatsReport.type_remote-inbound-rtp.kind πŸ“‹Firefox10/23/2018 Safari9/16/2020694
api.RTCStatsReport.type_remote-outbound-rtp.kind πŸ“‹Firefox10/23/2018 Safari9/16/2020694
api.SVGAElement.rel πŸ“‹Firefox6/26/2018 Safari9/16/2020813
api.SVGAElement.relList πŸ“‹Firefox6/26/2018 Safari9/16/2020813
api.ShadowRoot.getAnimations πŸ“‹Firefox4/7/2020 Safari9/16/2020162
api.URLSearchParams.delete πŸ“‹Firefox4/29/2014 Safari9/16/20202332
Safari: Removing a non-existent query parameter doesn't remove ? from the URL. See bug 193022.Safari on iOS: Removing a non-existent query parameter doesn't remove ? from the URL. See bug 193022.WebView on iOS: Removing a non-existent query parameter doesn't remove ? from the URL. See bug 193022.
api.WEBGL_color_buffer_float πŸ“‹Firefox6/10/2014 Safari9/16/20202290
api.WEBGL_debug_shaders πŸ“‹Firefox9/28/2017 Safari9/16/20201084
api.WEBGL_debug_shaders.getTranslatedShaderSource πŸ“‹Firefox9/28/2017 Safari9/16/20201084
api.Window.scroll.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
Safari: Safari does not have support for the smooth scroll behavior.Safari on iOS: Safari on iOS does not have support for the smooth scroll behavior.WebView on iOS: WebView on iOS does not have support for the smooth scroll behavior.
api.Window.scrollBy.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
Safari: Safari does not have support for the smooth scroll behavior.Safari on iOS: Safari on iOS does not have support for the smooth scroll behavior.WebView on iOS: WebView on iOS does not have support for the smooth scroll behavior.
api.Window.scrollTo.options_behavior_parameter Firefox2/24/2015 Safari9/16/20202031
Safari: Before version 15.4, Safari did not have support for the smooth scroll behavior.Safari on iOS: Before version 15.4, Safari on iOS did not have support for the smooth scroll behavior.WebView on iOS: Before version 15.4, WebView on iOS did not have support for the smooth scroll behavior.
css.properties.animation-timing-function.jump Firefox1/29/2019 Safari9/16/2020596
css.properties.background-clip.text πŸ“‹Firefox9/20/2016 Safari9/16/20201457
Chrome: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Chrome Android: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Edge: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Edge: Before Edge 15, this value was supported with the prefixed version of the property only.Firefox: Does not work with background-attachment: fixed (bug 1313757), in multi-layer backgrounds with other values (bug 1481498), and in some other special cases (see bug 1656784).Firefox for Android: Does not work with background-attachment: fixed (bug 1313757), in multi-layer backgrounds with other values (bug 1481498), and in some other special cases (see bug 1656784).Quest Browser: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Opera: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Opera Android: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).Safari: The text value is only supported by -webkit-background-clip (and not by background-clip).Safari on iOS: The text value is only supported by -webkit-background-clip (and not by background-clip).Samsung Internet: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).WebView Android: The text value is only supported by -webkit-background-clip (and not by background-clip; see bug 40229927).WebView on iOS: The text value is only supported by -webkit-background-clip (and not by background-clip).
css.properties.text-orientation πŸ“‹Firefox9/22/2015 Safari9/16/20201821
css.properties.transition-timing-function.jump Firefox1/29/2019 Safari9/16/2020596
css.selectors.is πŸ“‹Firefox6/30/2020 Safari9/16/202078
Chrome: Doesn't support combinators.Chrome Android: Doesn't support combinators.Edge: Doesn't support combinators.Firefox: Doesn't support combinators.Firefox: See bug 906353.Firefox for Android: Doesn't support combinators.Firefox for Android: See bug 906353.Quest Browser: Doesn't support combinators.Opera: Doesn't support combinators.Opera Android: Doesn't support combinators.Safari: Doesn't support combinators.Safari on iOS: Doesn't support combinators.WebView Android: Doesn't support combinators.WebView on iOS: Doesn't support combinators.
css.selectors.where πŸ“‹Firefox6/30/2020 Safari9/16/202078
css.types.easing-function.steps.jump Firefox1/29/2019 Safari9/16/2020596
html.elements.a.referrerpolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
html.elements.area.referrerpolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
html.elements.iframe.referrerpolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
html.elements.img.referrerpolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
html.elements.link.referrerpolicy πŸ“‹Firefox11/15/2016 Safari9/16/20201401
html.elements.script.referrerpolicy πŸ“‹Firefox1/29/2019 Safari9/16/2020596
html.elements.video.aspect_ratio_computed_from_attributes Firefox12/10/2019 Safari9/16/2020281
http.data-url.top_level_navigation_blocked Firefox3/13/2018 Safari9/16/2020918
http.headers.Cache-Control.stale-while-revalidate πŸ“‹Firefox7/9/2019 Safari9/16/2020435
http.headers.Referer.length_limit_4096B Firefox10/22/2019 Safari9/16/2020330
javascript.builtins.AggregateError πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.builtins.AggregateError.AggregateError πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.builtins.AggregateError.errors πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.builtins.BigInt πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.BigInt πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.asIntN πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.asUintN πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.toLocaleString πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.toLocaleString.locales_parameter Firefox10/22/2019 Safari9/16/2020330
Deno: Only the locale data for en-US is available.
javascript.builtins.BigInt.toLocaleString.options_parameter Firefox10/22/2019 Safari9/16/2020330
javascript.builtins.BigInt.toString πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.BigInt.valueOf πŸ“‹Firefox7/9/2019 Safari9/16/2020435
javascript.builtins.Intl.Locale πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.Locale πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.baseName πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.calendar πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.caseFirst πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.collation πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.hourCycle πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.language πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.maximize πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.minimize πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.numberingSystem πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.numeric πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.region πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.script πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.Locale.toString πŸ“‹Firefox4/7/2020 Safari9/16/2020162
javascript.builtins.Intl.RelativeTimeFormat πŸ“‹Firefox1/29/2019 Safari9/16/2020596
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat πŸ“‹Firefox1/29/2019 Safari9/16/2020596
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.locales_parameter Firefox1/29/2019 Safari9/16/2020596
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the RelativeTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_localeMatcher_parameter Firefox1/29/2019 Safari9/16/2020596
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numberingSystem_parameter Firefox5/5/2020 Safari9/16/2020134
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numeric_parameter Firefox1/29/2019 Safari9/16/2020596
javascript.builtins.Intl.RelativeTimeFormat.format πŸ“‹Firefox1/29/2019 Safari9/16/2020596
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.formatToParts πŸ“‹Firefox10/22/2019 Safari9/16/2020330
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.resolvedOptions πŸ“‹Firefox1/29/2019 Safari9/16/2020596
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the RelativeTimeFormat() constructor for more details.
javascript.builtins.Intl.RelativeTimeFormat.supportedLocalesOf πŸ“‹Firefox1/29/2019 Safari9/16/2020596
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Promise.any πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.builtins.Symbol.toStringTag.dom_objects Firefox6/30/2020 Safari9/16/202078
javascript.operators.logical_and_assignment πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.operators.logical_or_assignment πŸ“‹Firefox7/28/2020 Safari9/16/202050
javascript.operators.nullish_coalescing_assignment πŸ“‹Firefox7/28/2020 Safari9/16/202050

2020/8

API First Browser Date Last Browser Date Days Notes
css.properties.appearance.menulist-button πŸ“‹Safari10/26/2007 Firefox8/25/20204687
Firefox: See bug 1481615.Firefox for Android: See bug 1481615.

2020/7

API First Browser Date Last Browser Date Days Notes
api.CanvasPattern.setTransform.dommatrix Safari4/12/2018 Firefox7/28/2020838
api.FileReader.loadstart_event πŸ“‹Safari7/25/2012 Firefox7/28/20202925
Firefox: loadstart event dispatches synchronously (should be asynchronously as per spec).Firefox for Android: loadstart event dispatches synchronously (should be asynchronously as per spec).
api.RTCStatsReport.type_data-channel πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.bytesReceived πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.bytesSent πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.id πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.label πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.messagesReceived πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.messagesSent πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.protocol πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.state πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.timestamp πŸ“‹Safari3/24/2020 Firefox7/28/2020126
api.RTCStatsReport.type_data-channel.type πŸ“‹Safari3/24/2020 Firefox7/28/2020126
html.elements.a.implicit_noopener Safari3/25/2019 Firefox7/28/2020491
html.elements.area.implicit_noopener Safari3/25/2019 Firefox7/28/2020491
html.elements.iframe.sandbox.allow-top-navigation-by-user-activation πŸ“‹Safari4/12/2018 Firefox7/28/2020838

2020/6

API First Browser Date Last Browser Date Days Notes
css.selectors.read-only πŸ“‹Safari6/8/2009 Firefox6/30/20204040
css.selectors.read-write πŸ“‹Safari6/8/2009 Firefox6/30/20204040
javascript.builtins.RegExp.dotAll πŸ“‹Safari4/12/2018 Firefox6/30/2020810
javascript.regular_expressions.named_backreference πŸ“‹Safari4/12/2018 Firefox6/30/2020810
javascript.regular_expressions.named_capturing_group πŸ“‹Safari4/12/2018 Firefox6/30/2020810
javascript.regular_expressions.unicode_character_class_escape πŸ“‹Safari4/12/2018 Firefox6/30/2020810
webassembly.multi-value πŸ“‹Safari3/24/2020 Firefox6/30/202098
javascript.builtins.String.replaceAll πŸ“‹Safari3/24/2020 Firefox6/2/202070

2020/5

API First Browser Date Last Browser Date Days Notes
css.properties.grid-template-columns.repeat πŸ“‹Safari3/27/2017 Firefox5/5/20201135
Firefox: repeat(auto-fill, ...) and repeat(auto-fit, ...) only support one repeated column (see bug 1341507).Firefox: calc() doesn't work in repeat() (see bug 1350069).Firefox for Android: repeat(auto-fill, ...) and repeat(auto-fit, ...) only support one repeated column (see bug 1341507).Firefox for Android: calc() doesn't work in repeat() (see bug 1350069).
css.properties.grid-template-rows.repeat πŸ“‹Safari3/27/2017 Firefox5/5/20201135
Firefox: repeat(auto-fill, ...) and repeat(auto-fit, ...) only support one repeated column (see bug 1341507).Firefox: calc() doesn't work in repeat() (see bug 1350069).Firefox for Android: repeat(auto-fill, ...) and repeat(auto-fit, ...) only support one repeated column (see bug 1341507).Firefox for Android: calc() doesn't work in repeat() (see bug 1350069).

2020/4

API First Browser Date Last Browser Date Days Notes
api.Animation.commitStyles πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Animation.persist πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Animation.remove_event πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Animation.remove_filling_animation Safari3/24/2020 Firefox4/7/202014
api.Animation.replaceState πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Animation.timeline πŸ“‹Safari3/24/2020 Firefox4/7/202014
Firefox: Only the getter is supportedFirefox for Android: Only the getter is supportedSafari: Only the getter is supportedSafari on iOS: Only the getter is supportedWebView on iOS: Only the getter is supported
api.AnimationTimeline πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.AnimationTimeline.currentTime πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.CSSAnimation πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.CSSAnimation.animationName πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.CSSTransition πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.CSSTransition.transitionProperty πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Document.timeline πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.DocumentTimeline πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.DocumentTimeline.DocumentTimeline πŸ“‹Safari3/24/2020 Firefox4/7/202014
api.Element.animate.implicit_tofrom Safari3/24/2020 Firefox4/7/202014
Safari: Implementation seems somewhat buggy. More information will follow when available.Safari on iOS: Implementation seems somewhat buggy. More information will follow when available.WebView on iOS: Implementation seems somewhat buggy. More information will follow when available.
api.Element.getAnimations πŸ“‹Safari3/24/2020 Firefox4/7/202014
css.types.clamp πŸ“‹Safari3/24/2020 Firefox4/7/202014
css.types.max πŸ“‹Safari4/12/2018 Firefox4/7/2020726
css.types.min πŸ“‹Safari4/12/2018 Firefox4/7/2020726

2020/3

API First Browser Date Last Browser Date Days Notes
api.Animation πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.Animation πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.cancel πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.cancel_event πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.currentTime πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.effect πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.Animation.finish πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.finish_event πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.finished πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.Animation.id πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.pause πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.pending πŸ“‹Firefox3/13/2018 Safari3/24/2020742
Firefox: Before version 59, the pending status was reported by a "pending" value returned from Animation.playState.Firefox for Android: Before version 59, the pending status was reported by a "pending" value returned from Animation.playState.
api.Animation.play πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.playState πŸ“‹Firefox8/2/2016 Safari3/24/20201330
Chrome: Before Chrome 50/Opera 37, this property returned idle for an animation that had not yet started. Starting with Chrome 50/Opera 37, it shows paused.Chrome Android: Before Chrome Android 50/Opera 37, this property returned idle for an animation that had not yet started. Starting with Chrome Android 50/Opera 37, it shows paused.Firefox: Before Firefox 59, this property returned pending for Animations with incomplete asynchronous operations but as of Firefox 59 this is indicated by the separate Animation.pending property. This reflects recent changes to the specification.Firefox for Android: Before Firefox for Android 59, this property returned pending for Animations with incomplete asynchronous operations but as of Firefox for Android 59 this is indicated by the separate Animation.pending property. This reflects recent changes to the specification.Quest Browser: Before Quest Browser 5.0/Opera 37, this property returned idle for an animation that had not yet started. Starting with Quest Browser 5.0/Opera 37, it shows paused.Opera: Before Chrome 50/Opera 37, this property returned idle for an animation that had not yet started. Starting with Chrome 50/Opera 37, it shows paused.Opera Android: Before Chrome 50/Opera 37, this property returned idle for an animation that had not yet started. Starting with Chrome 50/Opera 37, it shows paused.Samsung Internet: Before Samsung Internet 5.0/Opera 37, this property returned idle for an animation that had not yet started. Starting with Samsung Internet 5.0/Opera 37, it shows paused.WebView Android: Before WebView Android 50/Opera 37, this property returned idle for an animation that had not yet started. Starting with WebView Android 50/Opera 37, it shows paused.
api.Animation.playbackRate πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.ready πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.Animation.reverse πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.startTime πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Animation.updatePlaybackRate πŸ“‹Firefox5/9/2018 Safari3/24/2020685
api.AnimationEffect πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationEffect.getComputedTiming πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationEffect.getTiming πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationEffect.updateTiming πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationEvent.pseudoElement πŸ“‹Firefox8/6/2013 Safari3/24/20202422
api.AnimationPlaybackEvent πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationPlaybackEvent.AnimationPlaybackEvent πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationPlaybackEvent.currentTime πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.AnimationPlaybackEvent.timelineTime πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.Clipboard πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.Clipboard.writeText πŸ“‹Firefox10/23/2018 Safari3/24/2020518
Chrome: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Chrome: Before version 107, the user must grant the clipboard-write permission.Chrome Android: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Chrome Android: Before version 107, the user must grant the clipboard-write permission.Edge: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Edge: Before version 107, the user must grant the clipboard-write permission.Firefox: This method must be called within user gesture event handlers.Firefox: Web extensions with the clipboardWrite permission in their manifest can write data without a user gesture.Firefox for Android: This method must be called within user gesture event handlers.Firefox for Android: Web extensions with the clipboardWrite permission in their manifest can write data without a user gesture.Quest Browser: From version false, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Quest Browser: Before version false, the user must grant the clipboard-write permission.Opera: From version 93, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Opera: Before version 93, the user must grant the clipboard-write permission.Opera Android: From version 73, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Opera Android: Before version 73, the user must grant the clipboard-write permission.Safari: This method must be called within user gesture event handlers.Safari on iOS: This method must be called within user gesture event handlers.Samsung Internet: From version 21.0, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.Samsung Internet: Before version 21.0, the user must grant the clipboard-write permission.WebView Android: From version 107, this method must be called within user gesture event handlers, or the user must grant the clipboard-write permission.WebView Android: Before version 107, the user must grant the clipboard-write permission.WebView on iOS: This method must be called within user gesture event handlers.
api.Element.animate πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Element.animate.options_id_parameter πŸ“‹Firefox8/2/2016 Safari3/24/20201330
api.Element.animationcancel_event πŸ“‹Firefox6/13/2017 Safari3/24/20201015
Chrome: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Chrome Android: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Edge: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Quest Browser: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Opera: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Opera Android: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.Safari: Although the onanimationcancel event handler property is supported, the animationcancel event is never fired.Safari on iOS: Although the onanimationcancel event handler property is supported, the animationcancel event is never fired.Samsung Internet: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.WebView Android: The onanimationcancel event handler property is not supported. To listen to this event, use element.addEventListener('animationcancel', function() {});. See bug 41404325.WebView on iOS: Although the onanimationcancel event handler property is supported, the animationcancel event is never fired.
api.Element.part πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.Element.transitioncancel_event πŸ“‹Firefox4/19/2017 Safari3/24/20201070
Chrome: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Chrome Android: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Edge: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Quest Browser: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Opera: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Opera Android: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.Safari: Although the ontransitioncancel event handler property is supported, the transitioncancel event is never fired.Safari on iOS: Although the ontransitioncancel event handler property is supported, the transitioncancel event is never fired.Samsung Internet: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.WebView Android: The ontransitioncancel event handler property is not supported. To listen to this event, use element.addEventListener('transitioncancel', function() {});.WebView on iOS: Although the ontransitioncancel event handler property is supported, the transitioncancel event is never fired.
api.Element.transitionrun_event πŸ“‹Firefox4/19/2017 Safari3/24/20201070
Internet Explorer: The ontransitionrun event handler property is not supported. To listen to this event, use element.addEventListener('transitionrun', function() {});.Safari: The event handler exists but will never be called.Safari on iOS: The event handler exists but will never be called.WebView on iOS: The event handler exists but will never be called.
api.Element.transitionstart_event πŸ“‹Firefox4/19/2017 Safari3/24/20201070
Internet Explorer: The ontransitionstart event handler property is not supported. To listen to this event, use element.addEventListener('transitionstart', function() {});.Safari: The event handler exists but will never be called.Safari on iOS: The event handler exists but will never be called.WebView on iOS: The event handler exists but will never be called.
api.FormData.worker_support Firefox7/2/2015 Safari3/24/20201727
api.GeolocationCoordinates πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.GeolocationPosition πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.GeolocationPositionError πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.KeyframeEffect πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.KeyframeEffect.KeyframeEffect πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.KeyframeEffect.getKeyframes πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.KeyframeEffect.setKeyframes πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.KeyframeEffect.target πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.MathMLElement πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MathMLElement.blur πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MathMLElement.dataset πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MathMLElement.focus πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MathMLElement.style πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MathMLElement.tabIndex πŸ“‹Firefox12/10/2019 Safari3/24/2020105
api.MediaDevices.getSupportedConstraints.return_object_property_echoCancellation πŸ“‹Firefox4/26/2016 Safari3/24/20201428
api.Navigator.clipboard πŸ“‹Firefox10/23/2018 Safari3/24/2020518
api.RTCDTMFSender πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFSender.insertDTMF πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFSender.toneBuffer πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFSender.tonechange_event πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFToneChangeEvent πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFToneChangeEvent.RTCDTMFToneChangeEvent πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCDTMFToneChangeEvent.tone πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCRtpSender.dtmf πŸ“‹Firefox3/7/2017 Safari3/24/20201113
api.RTCStatsReport.type_candidate-pair.id πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_candidate-pair.timestamp πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_candidate-pair.type πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_inbound-rtp.bytesReceived πŸ“‹Firefox2/4/2014 Safari3/24/20202240
api.RTCStatsReport.type_inbound-rtp.id πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_inbound-rtp.jitter πŸ“‹Firefox2/4/2014 Safari3/24/20202240
api.RTCStatsReport.type_inbound-rtp.packetsLost πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_inbound-rtp.packetsReceived πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_inbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_inbound-rtp.type πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_local-candidate.id πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_local-candidate.timestamp πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_local-candidate.type πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_outbound-rtp.bytesSent πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_outbound-rtp.id πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_outbound-rtp.packetsSent πŸ“‹Firefox2/4/2014 Safari3/24/20202240
api.RTCStatsReport.type_outbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_outbound-rtp.type πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_remote-candidate.id πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_remote-candidate.timestamp πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.RTCStatsReport.type_remote-candidate.type πŸ“‹Firefox1/7/2020 Safari3/24/202077
api.ResizeObserver πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserver.ResizeObserver πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserver.disconnect πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserver.observe πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserver.unobserve πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserverEntry πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserverEntry.contentRect πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.ResizeObserverEntry.target πŸ“‹Firefox9/3/2019 Safari3/24/2020203
api.SVGLengthList.length πŸ“‹Firefox6/21/2011 Safari3/24/20203199
api.SVGNumberList.length πŸ“‹Firefox6/21/2011 Safari3/24/20203199
api.SVGPointList.length πŸ“‹Firefox6/21/2011 Safari3/24/20203199
api.SVGStringList.length πŸ“‹Firefox4/24/2012 Safari3/24/20202891
api.SVGTransformList.length πŸ“‹Firefox12/20/2011 Safari3/24/20203017
api.StaticRange.StaticRange πŸ“‹Firefox12/10/2019 Safari3/24/2020105
css.properties.clip-path.fill-box πŸ“‹Firefox1/24/2017 Safari3/24/20201155
Firefox: This value was supported before Firefox 51, but as an alias to border-box.Firefox for Android: This value was supported before Firefox for Android 51, but as an alias to border-box.
css.properties.clip-path.path Firefox12/10/2019 Safari3/24/2020105
css.properties.clip-path.stroke-box πŸ“‹Firefox1/24/2017 Safari3/24/20201155
Firefox: This value was supported before Firefox 51, but as an alias to border-box.Firefox for Android: This value was supported before Firefox for Android 51, but as an alias to border-box.
css.properties.clip-path.view-box πŸ“‹Firefox6/13/2017 Safari3/24/20201015
css.properties.font-optical-sizing πŸ“‹Firefox9/5/2018 Safari3/24/2020566
css.properties.font-optical-sizing.auto πŸ“‹Firefox9/5/2018 Safari3/24/2020566
css.properties.font-optical-sizing.none πŸ“‹Firefox9/5/2018 Safari3/24/2020566
css.properties.image-orientation πŸ“‹Firefox12/10/2013 Safari3/24/20202296
css.properties.image-orientation.from-image πŸ“‹Firefox12/10/2013 Safari3/24/20202296
css.properties.image-orientation.none πŸ“‹Firefox12/10/2013 Safari3/24/20202296
css.properties.opacity.percentages Firefox10/22/2019 Safari3/24/2020154
css.properties.overflow.multiple_keywords Firefox6/26/2018 Safari3/24/2020637
css.properties.tab-size.length πŸ“‹Firefox4/19/2017 Safari3/24/20201070
css.properties.text-orientation.mixed πŸ“‹Firefox9/22/2015 Safari3/24/20201645
css.properties.text-orientation.upright πŸ“‹Firefox9/22/2015 Safari3/24/20201645
css.properties.white-space.break-spaces πŸ“‹Firefox9/3/2019 Safari3/24/2020203
css.selectors.part πŸ“‹Firefox1/7/2020 Safari3/24/202077
css.types.basic-shape.path πŸ“‹Firefox1/7/2020 Safari3/24/202077
css.types.basic-shape.path.clip-path πŸ“‹Firefox1/7/2020 Safari3/24/202077
css.types.length.Q Firefox9/20/2016 Safari3/24/20201281
html.elements.link.rel.prefetch πŸ“‹Firefox10/24/2006 Safari3/24/20204900
Chrome: Requires secure contextChrome Android: Requires secure contextEdge: Requires secure contextFirefox: Requires secure contextFirefox for Android: Requires secure contextQuest Browser: Requires secure contextOpera: Requires secure contextOpera Android: Requires secure contextSamsung Internet: Requires secure contextWebView Android: Requires secure context
html.global_attributes.exportparts πŸ“‹Firefox1/7/2020 Safari3/24/202077
html.global_attributes.part πŸ“‹Firefox1/7/2020 Safari3/24/202077
javascript.grammar.hashbang_comments πŸ“‹Firefox5/21/2019 Safari3/24/2020308
javascript.operators.nullish_coalescing πŸ“‹Firefox1/7/2020 Safari3/24/202077
javascript.operators.optional_chaining πŸ“‹Firefox3/10/2020 Safari3/24/202014
webassembly.api.Global πŸ“‹Firefox9/5/2018 Safari3/24/2020566
webassembly.api.Global.Global πŸ“‹Firefox9/5/2018 Safari3/24/2020566
Chrome: Constructing a Global with a value of v128 produces a TypeError.Chrome Android: Constructing a Global with a value of v128 produces a TypeError.Deno: Constructing a Global with a value of v128 produces a TypeError.Edge: Constructing a Global with a value of v128 produces a TypeError.Node.js: Constructing a Global with a value of v128 produces a TypeError.Quest Browser: Constructing a Global with a value of v128 produces a TypeError.Opera: Constructing a Global with a value of v128 produces a TypeError.Opera Android: Constructing a Global with a value of v128 produces a TypeError.Samsung Internet: Constructing a Global with a value of v128 produces a TypeError.WebView Android: Constructing a Global with a value of v128 produces a TypeError.
webassembly.api.Global.value πŸ“‹Firefox9/5/2018 Safari3/24/2020566
webassembly.api.Global.valueOf πŸ“‹Firefox9/5/2018 Safari3/24/2020566
webassembly.mutable-globals πŸ“‹Firefox9/5/2018 Safari3/24/2020566
api.HTMLIFrameElement.allow πŸ“‹Safari4/12/2018 Firefox3/10/2020698
api.TextMetrics.actualBoundingBoxAscent πŸ“‹Safari4/12/2018 Firefox3/10/2020698
api.TextMetrics.actualBoundingBoxDescent πŸ“‹Safari4/12/2018 Firefox3/10/2020698
api.TextMetrics.actualBoundingBoxLeft πŸ“‹Safari4/12/2018 Firefox3/10/2020698
api.TextMetrics.actualBoundingBoxRight πŸ“‹Safari4/12/2018 Firefox3/10/2020698
css.properties.text-underline-position πŸ“‹Safari3/25/2019 Firefox3/10/2020351
css.properties.text-underline-position.auto πŸ“‹Safari3/25/2019 Firefox3/10/2020351
css.properties.text-underline-position.from-font πŸ“‹Safari3/25/2019 Firefox3/10/2020351
css.properties.text-underline-position.under πŸ“‹Safari3/25/2019 Firefox3/10/2020351
html.elements.audio.crossorigin πŸ“‹Safari9/20/2016 Firefox3/10/20201267
Firefox: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.Firefox for Android: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.
html.elements.iframe.allow πŸ“‹Safari4/12/2018 Firefox3/10/2020698
html.elements.iframe.allow.camera πŸ“‹Safari4/12/2018 Firefox3/10/2020698
html.elements.iframe.allow.display-capture πŸ“‹Safari9/19/2019 Firefox3/10/2020173
html.elements.iframe.allow.microphone πŸ“‹Safari4/12/2018 Firefox3/10/2020698
html.elements.video.crossorigin πŸ“‹Safari9/20/2016 Firefox3/10/20201267
Firefox: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.Firefox for Android: With crossorigin="use-credentials", cookies aren't sent during seek. See bug 1532722.
http.headers.Cross-Origin-Resource-Policy πŸ“‹Safari9/17/2018 Firefox3/10/2020540
Chrome: Until version 75, downloads for files with this header would fail in Chrome. See bug 41452948.Chrome: From version 80 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 86, partial PDF loading is disabled.Chrome Android: Until version 75, downloads for files with this header would fail in Chrome Android. See bug 41452948.Chrome Android: From version 80 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 86, partial PDF loading is disabled.Quest Browser: Until version 7.0, downloads for files with this header would fail in Quest Browser. See bug 41452948.Quest Browser: From version 9.0 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 12.0, partial PDF loading is disabled.Opera: Until version 62, downloads for files with this header would fail in Opera. See bug 41452948.Opera: From version 67 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 72, partial PDF loading is disabled.Opera Android: Until version 54, downloads for files with this header would fail in Opera Android. See bug 41452948.Opera Android: From version 57 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 61, partial PDF loading is disabled.WebView Android: Until version 75, downloads for files with this header would fail in WebView Android. See bug 41452948.WebView Android: From version 80 to 85, linearized PDFs served inline with this header fail to render properly. See bug 40127935. From version 86, partial PDF loading is disabled.

2020/1

API First Browser Date Last Browser Date Days Notes
api.MediaStream.removetrack_event πŸ“‹Safari9/19/2017 Firefox1/7/2020840
Firefox: Before Firefox 72, the event handler was exposed but had no effect.Firefox for Android: Before Firefox for Android 79, the event handler was exposed but had no effect.
api.RTCStatsReport.type_local-candidate.port πŸ“‹Safari3/25/2019 Firefox1/7/2020288
api.RTCStatsReport.type_local-candidate.priority πŸ“‹Safari3/25/2019 Firefox1/7/2020288
api.RTCStatsReport.type_remote-candidate.port πŸ“‹Safari3/25/2019 Firefox1/7/2020288
api.RTCStatsReport.type_remote-candidate.priority πŸ“‹Safari3/25/2019 Firefox1/7/2020288
css.properties.letter-spacing.svg_elements Safari7/20/2011 Firefox1/7/20203093
css.properties.word-spacing.svg_elements Safari7/20/2011 Firefox1/7/20203093

2019/12

API First Browser Date Last Browser Date Days Notes
api.Navigator.share πŸ“‹Safari3/25/2019 Firefox12/10/2019260
Chrome: Only supported on ChromeOS and Windows, see bug 40542648 and bug 40729163.Edge: Only supported on Windows.Opera: Only supported on ChromeOS and Windows, see bug 40542648 and bug 40729163.
css.properties.column-span πŸ“‹Safari9/30/2015 Firefox12/10/20191532
css.properties.column-span.all πŸ“‹Safari7/20/2011 Firefox12/10/20193065
css.properties.column-span.none πŸ“‹Safari7/20/2011 Firefox12/10/20193065
javascript.builtins.Promise.allSettled πŸ“‹Safari9/19/2019 Firefox12/10/201982

2019/10

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.getTransform πŸ“‹Safari4/12/2018 Firefox10/22/2019558
api.CanvasRenderingContext2D.setTransform.matrix_parameter Safari4/12/2018 Firefox10/22/2019558
api.Document.all πŸ“‹Safari9/19/2017 Firefox10/22/2019763
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.captureEvents πŸ“‹Safari9/19/2017 Firefox10/22/2019763
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.clear πŸ“‹Safari9/19/2017 Firefox10/22/2019763
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.releaseEvents πŸ“‹Safari9/19/2017 Firefox10/22/2019763
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.MediaElementAudioSourceNode.mediaElement πŸ“‹Safari7/25/2012 Firefox10/22/20192645
api.MediaStreamAudioSourceNode.mediaStream πŸ“‹Safari9/19/2017 Firefox10/22/2019763
api.MediaStreamTrack.applyConstraints.groupId_constraint πŸ“‹Safari9/19/2017 Firefox10/22/2019763
css.properties.grid-auto-columns πŸ“‹Safari3/27/2017 Firefox10/22/2019939
Firefox: Does not accept multiple track-size values. See bug 1339672.Firefox for Android: Does not accept multiple track-size values. See bug 1339672.
css.properties.grid-auto-rows πŸ“‹Safari3/27/2017 Firefox10/22/2019939
Firefox: Does not accept multiple track-size values. See bug 1339672.Firefox for Android: Does not accept multiple track-size values. See bug 1339672.
css.properties.text-decoration-thickness πŸ“‹Safari3/25/2019 Firefox10/22/2019211
Chrome: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Chrome Android: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Edge: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Quest Browser: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Opera: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Opera Android: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.Samsung Internet: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.WebView Android: The text-decoration-thickness property has no effect unless text-underline-offset, text-decoration-color, or text-decoration-style are set to a non-initial value. See bug 40734940.
css.properties.text-decoration-thickness.auto πŸ“‹Safari3/25/2019 Firefox10/22/2019211
css.properties.text-decoration-thickness.from-font πŸ“‹Safari3/25/2019 Firefox10/22/2019211
css.properties.text-underline-offset πŸ“‹Safari3/25/2019 Firefox10/22/2019211
css.properties.text-underline-offset.auto πŸ“‹Safari3/25/2019 Firefox10/22/2019211
http.headers.Origin πŸ“‹Safari6/23/2003 Firefox10/22/20195965
Edge: Not sent with POST requestsFirefox: Not sent with POST requests, see bug 446344.Firefox for Android: Not sent with POST requests, see bug 446344.
javascript.grammar.numeric_separators πŸ“‹Safari9/19/2019 Firefox10/22/201933

2019/9

API First Browser Date Last Browser Date Days Notes
api.AuthenticatorAssertionResponse πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.authenticatorData πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.signature πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.userHandle πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAttestationResponse πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAttestationResponse.attestationObject πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorResponse πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorResponse.clientDataJSON πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.Credential πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.Credential.id πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.Credential.type πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option.attestation πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option.attestation.direct πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox for Android: credentialCreationData.attestationConveyancePreferenceOption value "direct" is not supported. See https://bugzil.la/1550164
api.CredentialsContainer.create.publicKey_option.attestation.enterprise πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox for Android: credentialCreationData.attestationConveyancePreferenceOption value "enterprise" is not supported. See https://bugzil.la/1550164
api.CredentialsContainer.create.publicKey_option.attestation.indirect πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option.attestation.none πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option.extensions πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.create.publicKey_option.extensions.appidExclude πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.get πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.get.publicKey_option πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.get.publicKey_option.extensions πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.get.publicKey_option.extensions.appid πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.CredentialsContainer.store πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.Element.gotpointercapture_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.hasPointerCapture πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.lostpointercapture_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointercancel_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerdown_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerenter_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerleave_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointermove_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerout_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerover_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.pointerup_event πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.releasePointerCapture πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Element.setPointerCapture πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Firefox: Before Firefox 82, setPointerCapture() throws InvalidPointerId for an invalid pointerId argument. From Firefox 82, it throws the specified NotFoundError exception. See bug 1662124.Firefox for Android: Before Firefox 82, setPointerCapture() throws InvalidPointerId for an invalid pointerId argument. From Firefox 82, it throws the specified NotFoundError exception. See bug 1662124.
api.HTMLFieldSetElement.elements.type_HTMLCollection Firefox3/22/2011 Safari9/19/20193103
api.HTMLObjectElement.contentWindow πŸ“‹Firefox6/25/2013 Safari9/19/20192277
api.MediaCapabilities πŸ“‹Firefox10/23/2018 Safari9/19/2019331
api.MediaCapabilities.decodingInfo πŸ“‹Firefox10/23/2018 Safari9/19/2019331
Chrome: codecs string can contain any subset of optional parameters (should be all or none).Chrome: Errors if codecs string contains unexpected characters (should evaluate string up to character).Chrome Android: codecs string can contain any subset of optional parameters (should be all or none).Chrome Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Edge: codecs string can contain any subset of optional parameters (should be all or none).Edge: Errors if codecs string contains unexpected characters (should evaluate string up to character).Firefox: The webrtc value of the type option is named transmission.Firefox: Before Firefox 101, decodingInfo() ignored codecs parameter options for av01 codecs (treating them as av1).Firefox for Android: The webrtc value of the type option is named transmission.Firefox for Android: Before Firefox for Android 101, decodingInfo() ignored codecs parameter options for av01 codecs (treating them as av1).Quest Browser: codecs string can contain any subset of optional parameters (should be all or none).Quest Browser: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera: codecs string can contain any subset of optional parameters (should be all or none).Opera: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera Android: codecs string can contain any subset of optional parameters (should be all or none).Opera Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Samsung Internet: codecs string can contain any subset of optional parameters (should be all or none).Samsung Internet: Errors if codecs string contains unexpected characters (should evaluate string up to character).WebView Android: codecs string can contain any subset of optional parameters (should be all or none).WebView Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).
api.MediaDevices.getDisplayMedia πŸ“‹Firefox3/19/2019 Safari9/19/2019184
Chrome Android: From Chrome Android 72 to 88, this method was exposed, but always failed with NotAllowedError. See bug 40418135.Edge: Available as a member of Navigator instead of MediaDevices.Firefox: Since Firefox 33 you can capture screen data using getUserMedia(), with a video constraint called mediaSource. Before 52 it relied on a client-configurable list of allowed sites.Firefox for Android: From Firefox Android 66 to 79, this method was exposed, but always failed with NotAllowedError.Quest Browser: From Quest Browser 6.0 to 88, this method was exposed, but always failed with NotAllowedError. See bug 40418135.Opera Android: From Opera Android 51 to 88, this method was exposed, but always failed with NotAllowedError. See bug 40418135.Samsung Internet: From Samsung Internet 11.0 to 88, this method was exposed, but always failed with NotAllowedError. See bug 40418135.WebView Android: From WebView Android 72 to 88, this method was exposed, but always failed with NotAllowedError. See bug 40418135.
api.Navigator.credentials πŸ“‹Firefox5/9/2018 Safari9/19/2019498
api.Navigator.maxTouchPoints πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.Navigator.mediaCapabilities πŸ“‹Firefox10/23/2018 Safari9/19/2019331
api.PerformanceObserver.supportedEntryTypes_static πŸ“‹Firefox7/9/2019 Safari9/19/201972
api.PointerEvent πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: See MSDN Pointer events updates.
api.PointerEvent.PointerEvent πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: See MSDN Pointer events updates.
api.PointerEvent.height πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: Returns values in screen pixels instead of CSS document pixels.
api.PointerEvent.isPrimary πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.pointerId πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.pointerType πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: Returns an integer enumeration instead of a string.
api.PointerEvent.pressure πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: Returns 0 instead of 0.5 on hardware that doesn't support pressure.
api.PointerEvent.tangentialPressure πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.tiltX πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.tiltY πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.twist πŸ“‹Firefox3/13/2018 Safari9/19/2019555
api.PointerEvent.width πŸ“‹Firefox3/13/2018 Safari9/19/2019555
Internet Explorer: Returns values in screen pixels instead of CSS document pixels.
api.PublicKeyCredential πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.getClientExtensionResults πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable_static πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.rawId πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.response πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.Window.afterprint_event πŸ“‹Firefox8/16/2011 Safari9/19/20192956
api.Window.beforeprint_event πŸ“‹Firefox8/16/2011 Safari9/19/20192956
api.console.countReset_static πŸ“‹Firefox9/5/2018 Safari9/19/2019379
api.console.timeLog_static πŸ“‹Firefox9/5/2018 Safari9/19/2019379
css.at-rules.media.display-mode πŸ“‹Firefox6/7/2016 Safari9/19/20191199
css.at-rules.media.display-mode.browser πŸ“‹Firefox6/7/2016 Safari9/19/20191199
Firefox for Android: display-mode: browser is always true.Safari: In a Safari browser window, display-mode: browser is always true, even in a macOS Full Screen window or when using the Fullscreen API. In an installed web application, other display-mode values are true only when given by a supported manifest display member value. See mdn/browser-compat-data#18807 (comment).Safari on iOS: In the Safari app, display-mode: browser is always true, even when using the Fullscreen API. In an installed web application, other display-mode values are true only when given by a supported manifest display member value. See mdn/browser-compat-data#18807 (comment).WebView on iOS: In the Safari app, display-mode: browser is always true, even when using the Fullscreen API. In an installed web application, other display-mode values are true only when given by a supported manifest display member value. See mdn/browser-compat-data#18807 (comment).
css.at-rules.media.display-mode.fullscreen πŸ“‹Firefox6/7/2016 Safari9/19/20191199
Firefox: In Firefox's "Full Screen" user interface, browser tabs and other user interface appear but display-mode: fullscreen is true.Safari: In a Safari browser window, display-mode: fullscreen is never true, even when using the Fullscreen API. See mdn/browser-compat-data#18807 (comment).Safari on iOS: In the Safari app, display-mode: fullscreen is never true, even when using the Fullscreen API. See mdn/browser-compat-data#18807 (comment).Safari on iOS: In an installed web application with the display manifest member set to standalone, display-mode: fullscreen is true, even though the system status bar is visible. See bug 264218.WebView on iOS: In the Safari app, display-mode: fullscreen is never true, even when using the Fullscreen API. See mdn/browser-compat-data#18807 (comment).WebView on iOS: In an installed web application with the display manifest member set to standalone, display-mode: fullscreen is true, even though the system status bar is visible. See bug 264218.
css.at-rules.media.display-mode.minimal-ui πŸ“‹Firefox11/14/2017 Safari9/19/2019674
Firefox: display-mode: minimal-ui is never true.Safari: display-mode: minimal-ui is never true.Safari on iOS: display-mode: minimal-ui is never true.WebView on iOS: display-mode: minimal-ui is never true.
css.at-rules.media.display-mode.standalone πŸ“‹Firefox11/14/2017 Safari9/19/2019674
Firefox: display-mode: standalone is never true.Safari on iOS: In an installed web application with the display manifest member set to standalone, display-mode: standalone is false and display-mode: fullscreen is true. See bug 264218.WebView on iOS: In an installed web application with the display manifest member set to standalone, display-mode: standalone is false and display-mode: fullscreen is true. See bug 264218.
css.properties.clip-path.border-box πŸ“‹Firefox6/13/2017 Safari9/19/2019828
css.properties.clip-path.content-box πŸ“‹Firefox6/13/2017 Safari9/19/2019828
css.properties.clip-path.margin-box πŸ“‹Firefox6/13/2017 Safari9/19/2019828
css.properties.clip-path.padding-box πŸ“‹Firefox6/13/2017 Safari9/19/2019828
css.properties.display.flow-root Firefox4/19/2017 Safari9/19/2019883
css.properties.line-break.anywhere πŸ“‹Firefox9/3/2019 Safari9/19/201916
css.properties.position.sticky πŸ“‹Firefox9/2/2014 Safari9/19/20191843
css.properties.touch-action πŸ“‹Firefox3/7/2017 Safari9/19/2019926
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.manipulation Firefox3/7/2017 Safari9/19/2019926
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.none Firefox3/7/2017 Safari9/19/2019926
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.pan-x Firefox3/7/2017 Safari9/19/2019926
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.pan-y Firefox3/7/2017 Safari9/19/2019926
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
http.headers.Access-Control-Allow-Headers.wildcard Firefox9/3/2019 Safari9/19/201916
http.headers.Access-Control-Allow-Methods.wildcard Firefox9/3/2019 Safari9/19/201916
http.headers.Access-Control-Expose-Headers.wildcard Firefox9/3/2019 Safari9/19/201916
http.headers.Set-Cookie.SameSite πŸ“‹Firefox5/9/2018 Safari9/19/2019498
Safari: Safari 13 on macOS 10.14 (Mojave), treats SameSite=None and invalid values as Strict. This is fixed in version 10.15 (Catalina) and later.Safari: Treats SameSite=None and invalid values as Strict in macOS before 10.15 Catalina. See bug 198181.Safari on iOS: Treats SameSite=None and invalid values as Strict in iOS before 13. See bug 198181.WebView on iOS: Treats SameSite=None and invalid values as Strict in iOS before 13. See bug 198181.
http.headers.Set-Cookie.SameSite.None Firefox5/9/2018 Safari9/19/2019498
Chrome: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.Chrome Android: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.Quest Browser: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.Opera: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.Opera Android: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.Safari: Not supported before macOS version 10.15 (Catalina).Samsung Internet: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.WebView Android: Rejects cookies with SameSite=None. See SameSite=None: Known Incompatible Clients.
http.headers.Set-Cookie.host_secure_prefixes Firefox11/15/2016 Safari9/19/20191038
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_hourCycle_parameter Firefox1/23/2018 Safari9/19/2019604
javascript.builtins.Intl.NumberFormat.formatToParts πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.PluralRules πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.PluralRules πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the PluralRules instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.PluralRules.resolvedOptions πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.select πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.Intl.PluralRules.supportedLocalesOf πŸ“‹Firefox1/23/2018 Safari9/19/2019604
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the PluralRules() constructor for more details.
javascript.builtins.RegExp.@@matchAll πŸ“‹Firefox5/21/2019 Safari9/19/2019121
javascript.builtins.String.matchAll πŸ“‹Firefox5/21/2019 Safari9/19/2019121
javascript.builtins.Symbol.matchAll πŸ“‹Firefox5/21/2019 Safari9/19/2019121
api.DOMMatrix.fromFloat32Array_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrix.fromFloat64Array_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrix.fromMatrix_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrix.worker_support Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrixReadOnly.fromFloat32Array_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrixReadOnly.fromFloat64Array_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrixReadOnly.fromMatrix_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMMatrixReadOnly.worker_support Safari9/19/2017 Firefox9/3/2019714
api.DOMPoint.worker_support Safari3/27/2017 Firefox9/3/2019890
api.DOMPointReadOnly.matrixTransform πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMPointReadOnly.worker_support Safari3/27/2017 Firefox9/3/2019890
api.DOMQuad.fromQuad_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMQuad.fromRect_static πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.DOMQuad.worker_support Safari9/19/2017 Firefox9/3/2019714
api.DOMRect.fromRect_static πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.DOMRect.worker_support Safari3/27/2017 Firefox9/3/2019890
api.DOMRectReadOnly.fromRect_static πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.DOMRectReadOnly.worker_support Safari3/27/2017 Firefox9/3/2019890
api.Document.alinkColor πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.bgColor πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.close πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.designMode πŸ“‹Safari3/27/2017 Firefox9/3/2019890
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.domain πŸ“‹Safari6/23/2003 Firefox9/3/20195916
Chrome: Since Chrome 115, setting domain has no effect, unless the website has opted into origin-keyed agent clusters.Chrome Android: Since Chrome Android 115, setting domain has no effect, unless the website has opted into origin-keyed agent clusters.Firefox: From Firefox 62, if the domain cannot be identified, domain returns an empty string instead of null. See bug 819475.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: From Firefox for Android 62, if the domain cannot be identified, domain returns an empty string instead of null. See bug 819475.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Quest Browser: Since Quest Browser false, setting domain has no effect, unless the website has opted into origin-keyed agent clusters.Samsung Internet: Since Samsung Internet 23.0, setting domain has no effect, unless the website has opted into origin-keyed agent clusters.WebView Android: Since WebView Android 115, setting domain has no effect, unless the website has opted into origin-keyed agent clusters.
api.Document.execCommand Safari4/15/2005 Firefox9/3/20195254
Firefox: From Firefox 82, nested calls are not supported (return false). See bug 1634262.Firefox: Before Firefox 89, manipulating the content of <input> and <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: From Firefox for Android 82, nested calls are not supported (return false). See bug 1634262.Firefox for Android: Before Firefox for Android 89, manipulating the content of <input> and <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.fgColor πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.linkColor πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.open πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.queryCommandEnabled Safari4/29/2005 Firefox9/3/20195240
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox: queryCommandEnabled with arguments cut, copy or paste would throw errors unless the script had special privileges.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Firefox for Android: queryCommandEnabled with arguments cut, copy or paste would throw errors unless the script had special privileges.
api.Document.queryCommandIndeterm Safari4/29/2005 Firefox9/3/20195240
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.queryCommandState Safari4/29/2005 Firefox9/3/20195240
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.queryCommandSupported Safari4/29/2005 Firefox9/3/20195240
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox: The "paste" command is reported as supported when the paste feature is available even if the calling script has insufficient privileges to actually perform the action.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Firefox for Android: The "paste" command is reported as supported when the paste feature is available even if the calling script has insufficient privileges to actually perform the action.
api.Document.queryCommandValue Safari4/29/2005 Firefox9/3/20195240
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.vlinkColor πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.write πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.writeln πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Navigator.mediaDevices.secure_context_required Safari9/19/2017 Firefox9/3/2019714
api.PromiseRejectionEvent πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.PromiseRejectionEvent.PromiseRejectionEvent πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.PromiseRejectionEvent.promise πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.PromiseRejectionEvent.reason πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.SVGGeometryElement.isPointInFill πŸ“‹Safari9/17/2018 Firefox9/3/2019351
Chrome: The element this method is called for must be in the DOM; otherwise, this method will always return false.Chrome Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.Edge: The element this method is called for must be in the DOM; otherwise, this method will always return false.Quest Browser: The element this method is called for must be in the DOM; otherwise, this method will always return false.Opera: The element this method is called for must be in the DOM; otherwise, this method will always return false.Opera Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.WebView Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.
api.SVGGeometryElement.isPointInFill.point_parameter_DOMPoint Safari9/17/2018 Firefox9/3/2019351
api.SVGGeometryElement.isPointInStroke πŸ“‹Safari9/17/2018 Firefox9/3/2019351
Chrome: The element this method is called for must be in the DOM; otherwise, this method will always return false.Chrome Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.Edge: The element this method is called for must be in the DOM; otherwise, this method will always return false.Quest Browser: The element this method is called for must be in the DOM; otherwise, this method will always return false.Opera: The element this method is called for must be in the DOM; otherwise, this method will always return false.Opera Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.WebView Android: The element this method is called for must be in the DOM; otherwise, this method will always return false.
api.SVGGeometryElement.isPointInStroke.point_parameter_DOMPoint Safari9/17/2018 Firefox9/3/2019351
api.StaticRange πŸ“‹Safari3/27/2017 Firefox9/3/2019890
Firefox: In Firefox, StaticRange can currently only be used by browser-internal code or code with enhanced permissions; it is not yet exposed to the web.
api.StaticRange.collapsed πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.StaticRange.endContainer πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.StaticRange.endOffset πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.StaticRange.startContainer πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.StaticRange.startOffset πŸ“‹Safari3/27/2017 Firefox9/3/2019890
api.Window.rejectionhandled_event πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.Window.unhandledrejection_event πŸ“‹Safari9/19/2017 Firefox9/3/2019714
Firefox: event.preventDefault() does not prevent Firefox from logging the error message in the console, see bug 1642147.Firefox for Android: event.preventDefault() does not prevent Firefox for Android from logging the error message in the console, see bug 1642147.
api.WorkerGlobalScope.rejectionhandled_event πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.WorkerGlobalScope.unhandledrejection_event πŸ“‹Safari9/19/2017 Firefox9/3/2019714
api.queueMicrotask πŸ“‹Safari3/25/2019 Firefox9/3/2019162
css.properties.cx πŸ“‹Safari9/30/2015 Firefox9/3/20191434
css.properties.cy πŸ“‹Safari9/30/2015 Firefox9/3/20191434
css.properties.line-break πŸ“‹Safari9/19/2017 Firefox9/3/2019714
css.properties.line-break.auto πŸ“‹Safari10/22/2013 Firefox9/3/20192142
css.properties.line-break.loose πŸ“‹Safari10/16/2014 Firefox9/3/20191783
css.properties.line-break.normal πŸ“‹Safari4/29/2005 Firefox9/3/20195240
css.properties.line-break.strict πŸ“‹Safari10/16/2014 Firefox9/3/20191783
css.properties.r πŸ“‹Safari9/30/2015 Firefox9/3/20191434
css.properties.user-select πŸ“‹Safari10/26/2007 Firefox9/3/20194330
css.properties.x πŸ“‹Safari9/30/2015 Firefox9/3/20191434
css.properties.y πŸ“‹Safari9/30/2015 Firefox9/3/20191434

2019/7

API First Browser Date Last Browser Date Days Notes
api.CSSStyleSheet.addRule πŸ“‹Safari6/23/2003 Firefox7/9/20195860
api.CSSStyleSheet.removeRule πŸ“‹Safari10/26/2007 Firefox7/9/20194274
api.CSSStyleSheet.rules πŸ“‹Safari6/23/2003 Firefox7/9/20195860
api.Document.cookie πŸ“‹Safari6/8/2009 Firefox7/9/20193683
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.HTMLImageElement.decode πŸ“‹Safari4/12/2018 Firefox7/9/2019453
api.HTMLTrackElement.cuechange_event πŸ“‹Safari9/20/2016 Firefox7/9/20191022
Chrome: The oncuechange event handler property is not supported.Chrome Android: The oncuechange event handler property is not supported.Opera: The oncuechange event handler property is not supported.Opera Android: The oncuechange event handler property is not supported.Safari: The oncuechange event handler property is not supported.Safari on iOS: The oncuechange event handler property is not supported.Samsung Internet: The oncuechange event handler property is not supported.WebView Android: The oncuechange event handler property is not supported.WebView on iOS: The oncuechange event handler property is not supported.
api.MediaDevices.getUserMedia.secure_context_required Safari9/19/2017 Firefox7/9/2019658
api.RTCDataChannel.negotiated πŸ“‹Safari9/19/2017 Firefox7/9/2019658
api.RTCRtpReceiver.getContributingSources.video_tracks_supported Safari3/25/2019 Firefox7/9/2019106
api.RTCRtpReceiver.getSynchronizationSources.video_tracks_supported Safari3/25/2019 Firefox7/9/2019106
css.properties.line-clamp πŸ“‹Safari6/7/2010 Firefox7/9/20193319
Safari: Accidental exposure.Safari on iOS: Accidental exposure.WebView on iOS: Accidental exposure.
css.properties.scroll-padding.auto πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-align πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-align.center πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-align.end πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-align.none πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-align.start πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-type.block πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-type.both πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-type.inline πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-type.x πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.properties.scroll-snap-type.y πŸ“‹Safari9/19/2017 Firefox7/9/2019658
css.selectors.marker πŸ“‹Safari4/12/2018 Firefox7/9/2019453
Safari: Safari support is limited to color and font-size.Safari on iOS: Safari on iOS support is limited to color and font-size.WebView on iOS: WebView on iOS support is limited to color and font-size.

2019/5

API First Browser Date Last Browser Date Days Notes
api.InputEvent.data πŸ“‹Safari3/27/2017 Firefox5/21/2019785
api.InputEvent.dataTransfer πŸ“‹Safari3/27/2017 Firefox5/21/2019785
css.at-rules.media.prefers-color-scheme πŸ“‹Safari3/25/2019 Firefox5/21/201957
css.properties.word-break.break-word πŸ“‹Safari10/26/2007 Firefox5/21/20194225
css.types.global_keywords.revert πŸ“‹Safari3/21/2016 Firefox5/21/20191156
javascript.operators.import πŸ“‹Safari4/12/2018 Firefox5/21/2019404
Deno: Bundled Deno applications (using deno compile) do not support dynamic importsNode.js: Dynamic import can be used in either CommonJS or ES module files, to import either CommonJS or ES module files. See Node's ECMAScript Modules documentation for more details.Node.js: Dynamic import can be used in either CommonJS or ES module files, to import either CommonJS or ES module files. See Node's ECMAScript Modules documentation for more details.

2019/3

API First Browser Date Last Browser Date Days Notes
api.AbortController πŸ“‹Firefox11/14/2017 Safari3/25/2019496
Safari: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.Safari on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.WebView on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.
api.AbortController.AbortController πŸ“‹Firefox11/14/2017 Safari3/25/2019496
Safari: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.Safari on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.WebView on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.
api.AbortController.abort πŸ“‹Firefox11/14/2017 Safari3/25/2019496
Node.js: The optional reason argument is not supported.Node.js: The optional reason argument is not supported.Safari: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.Safari on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.WebView on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.
api.AbortController.signal πŸ“‹Firefox11/14/2017 Safari3/25/2019496
Safari: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.Safari on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.WebView on iOS: Even though window.AbortController is defined, it doesn't really abort fetch requests. See bug 174980.
api.CustomElementRegistry.upgrade πŸ“‹Firefox10/23/2018 Safari3/25/2019153
api.DedicatedWorkerGlobalScope.name πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.HTMLDataListElement πŸ“‹Firefox3/22/2011 Safari3/25/20192925
api.HTMLDataListElement.options πŸ“‹Firefox3/22/2011 Safari3/25/20192925
api.HTMLInputElement.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
api.HTMLMediaElement.encrypted_event πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.HTMLMediaElement.mediaKeys πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.HTMLMediaElement.setMediaKeys πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.HTMLSlotElement.assignedElements πŸ“‹Firefox3/19/2019 Safari3/25/20196
api.IntersectionObserver πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserver.IntersectionObserver πŸ“‹Firefox8/8/2017 Safari3/25/2019594
Firefox: Before version 96, the constructor throws a DOMException if the options.rootMargin option is passed an empty string (see bug 1738791).
api.IntersectionObserver.disconnect πŸ“‹Firefox8/8/2017 Safari3/25/2019594
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserver.observe πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserver.root πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserver.rootMargin πŸ“‹Firefox8/8/2017 Safari3/25/2019594
Safari: rootMargin does not work with <iframe>s.Safari on iOS: rootMargin does not work with <iframe>s.WebView on iOS: rootMargin does not work with <iframe>s.
api.IntersectionObserver.takeRecords πŸ“‹Firefox8/8/2017 Safari3/25/2019594
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserver.thresholds πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserver.unobserve πŸ“‹Firefox8/8/2017 Safari3/25/2019594
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserverEntry πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.boundingClientRect πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.intersectionRatio πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.intersectionRect πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.isIntersecting πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.rootBounds πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.target πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.IntersectionObserverEntry.time πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.MediaDevices.getSupportedConstraints.return_object_property_deviceId πŸ“‹Firefox1/26/2016 Safari3/25/20191154
api.MediaDevices.getSupportedConstraints.return_object_property_facingMode πŸ“‹Firefox1/26/2016 Safari3/25/20191154
api.MediaDevices.getSupportedConstraints.return_object_property_frameRate πŸ“‹Firefox1/26/2016 Safari3/25/20191154
api.MediaDevices.getSupportedConstraints.return_object_property_height πŸ“‹Firefox1/26/2016 Safari3/25/20191154
api.MediaDevices.getSupportedConstraints.return_object_property_width πŸ“‹Firefox1/26/2016 Safari3/25/20191154
api.MediaEncryptedEvent πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaEncryptedEvent.MediaEncryptedEvent πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaEncryptedEvent.initData πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaEncryptedEvent.initDataType πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyMessageEvent πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyMessageEvent.MediaKeyMessageEvent πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyMessageEvent.message πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyMessageEvent.messageType πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.close πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.closed πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.expiration πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.generateRequest πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.keyStatuses πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.keystatuseschange_event πŸ“‹Firefox3/7/2017 Safari3/25/2019748
Chrome: The onkeystatuseschange event handler property is not supported.Chrome Android: The onkeystatuseschange event handler property is not supported.Opera: The onkeystatuseschange event handler property is not supported.Opera Android: The onkeystatuseschange event handler property is not supported.Samsung Internet: The onkeystatuseschange event handler property is not supported.WebView Android: The onkeystatuseschange event handler property is not supported.
api.MediaKeySession.load πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.message_event πŸ“‹Firefox3/7/2017 Safari3/25/2019748
Chrome: The onmessage event handler property is not supported.Chrome Android: The onmessage event handler property is not supported.Opera: The onmessage event handler property is not supported.Opera Android: The onmessage event handler property is not supported.Samsung Internet: The onmessage event handler property is not supported.WebView Android: The onmessage event handler property is not supported.
api.MediaKeySession.remove πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.sessionId πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySession.update πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyStatusMap πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyStatusMap.@@iterator Firefox3/8/2016 Safari3/25/20191112
api.MediaKeyStatusMap.entries Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyStatusMap.forEach Firefox6/7/2016 Safari3/25/20191021
api.MediaKeyStatusMap.get πŸ“‹Firefox3/8/2016 Safari3/25/20191112
api.MediaKeyStatusMap.has πŸ“‹Firefox3/8/2016 Safari3/25/20191112
api.MediaKeyStatusMap.keys Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyStatusMap.size πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeyStatusMap.values Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySystemAccess πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySystemAccess.createMediaKeys πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeySystemAccess.getConfiguration πŸ“‹Firefox12/15/2015 Safari3/25/20191196
Firefox: Before Firefox 50, the returned object has neither a distinctiveIdentifier nor a persistentState property.Firefox for Android: Before Firefox for Android 50, the returned object has neither a distinctiveIdentifier nor a persistentState property.
api.MediaKeySystemAccess.keySystem πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeys πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeys.createSession πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MediaKeys.setServerCertificate πŸ“‹Firefox5/12/2015 Safari3/25/20191413
api.MouseEvent.getModifierState πŸ“‹Firefox8/28/2012 Safari3/25/20192400
api.Navigator.requestMediaKeySystemAccess πŸ“‹Firefox5/12/2015 Safari3/25/20191413
Chrome: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Chrome: The function does not exist in insecure contexts. This was not enforced until Chrome 58.Chrome Android: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Chrome Android: The function does not exist in insecure contexts. This was not enforced until Chrome Android 58.Firefox: Starting in Firefox 55, if neither audioCapabilities nor videoCapabilities is specified in supportedConfigurations, a warning is output to the web console.Firefox: In addition, starting in Firefox 55, if in supportedConfigurations, either audioCapabilities's or videoCapabilities's contentType value doesn't specify a "codecs" substring to define allowed codecs within the media wrapper, a warning is output to the web console. See note below table for example and correction.Firefox: In the future, if neither audioCapabilities nor videoCapabilities is specified in the supportedConfigurations, a NotSupported exception will be thrown.Firefox for Android: Starting in Firefox for Android 55, if neither audioCapabilities nor videoCapabilities is specified in supportedConfigurations, a warning is output to the web console.Firefox for Android: In addition, starting in Firefox for Android 55, if in supportedConfigurations, either audioCapabilities's or videoCapabilities's contentType value doesn't specify a "codecs" substring to define allowed codecs within the media wrapper, a warning is output to the web console. See note below table for example and correction.Firefox for Android: In the future, if neither audioCapabilities nor videoCapabilities is specified in the supportedConfigurations, a NotSupported exception will be thrown.Quest Browser: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Quest Browser: The function does not exist in insecure contexts. This was not enforced until Quest Browser 5.0.Opera: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Opera: The function does not exist in insecure contexts. This was not enforced until Opera 45.Opera Android: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Opera Android: The function does not exist in insecure contexts. This was not enforced until Opera 45.Samsung Internet: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.Samsung Internet: The function does not exist in insecure contexts. This was not enforced until Samsung Internet 7.0.WebView Android: The spec requires that the passed supportedConfigurations option contain at least one of audioCapabilities or videoCapabilities, and that said parameters include a codec string.WebView Android: The function does not exist in insecure contexts. This was not enforced until version 58.
api.PaymentMethodChangeEvent πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentMethodChangeEvent.PaymentMethodChangeEvent πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentMethodChangeEvent.methodDetails πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentMethodChangeEvent.methodName πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentRequest.paymentmethodchange_event πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentResponse.payerdetailchange_event πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.PaymentResponse.retry πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.RTCCertificate πŸ“‹Firefox11/3/2015 Safari3/25/20191238
api.RTCCertificate.expires πŸ“‹Firefox11/3/2015 Safari3/25/20191238
api.RTCPeerConnection.RTCPeerConnection.configuration_certificates_parameter πŸ“‹Firefox11/3/2015 Safari3/25/20191238
api.RTCPeerConnection.addTransceiver.init_streams_parameter Firefox3/13/2018 Safari3/25/2019377
api.RTCPeerConnection.generateCertificate_static πŸ“‹Firefox6/25/2013 Safari3/25/20192099
api.RTCRtpReceiver.getContributingSources πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpReceiver.getContributingSources.audioLevel πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpReceiver.getContributingSources.audio_tracks_supported Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpReceiver.getContributingSources.source πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpReceiver.getContributingSources.timestamp πŸ“‹Firefox3/13/2018 Safari3/25/2019377
Firefox: Starting in version 60, the timestamp is correctly computed based on the window's Performance time, rather than Date.getTime().Firefox for Android: Starting in version 60, the timestamp is correctly computed based on the window's Performance time, rather than Date.getTime().
api.RTCRtpReceiver.getStats πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.RTCRtpReceiver.getSynchronizationSources πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpReceiver.getSynchronizationSources.audio_tracks_supported Firefox3/13/2018 Safari3/25/2019377
api.RTCRtpSender.getParameters.return_object_property_encodings πŸ“‹Firefox4/26/2016 Safari3/25/20191063
api.RTCRtpSender.getStats πŸ“‹Firefox8/8/2017 Safari3/25/2019594
api.RTCRtpSender.setParameters.parameters_headerExtensions_parameter πŸ“‹Firefox4/26/2016 Safari3/25/20191063
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpTransceiver.currentDirection πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.RTCStatsReport.type_local-candidate πŸ“‹Firefox2/4/2014 Safari3/25/20191875
api.RTCStatsReport.type_local-candidate.candidateType πŸ“‹Firefox2/4/2014 Safari3/25/20191875
api.RTCStatsReport.type_local-candidate.protocol πŸ“‹Firefox12/11/2018 Safari3/25/2019104
api.RTCStatsReport.type_local-candidate.transportId πŸ“‹Firefox7/22/2014 Safari3/25/20191707
api.RTCStatsReport.type_remote-candidate πŸ“‹Firefox2/4/2014 Safari3/25/20191875
api.RTCStatsReport.type_remote-candidate.candidateType πŸ“‹Firefox2/4/2014 Safari3/25/20191875
api.RTCStatsReport.type_remote-candidate.protocol πŸ“‹Firefox12/11/2018 Safari3/25/2019104
api.RTCStatsReport.type_remote-candidate.transportId πŸ“‹Firefox7/22/2014 Safari3/25/20191707
api.Request.credentials.default_same-origin Firefox6/26/2018 Safari3/25/2019272
api.Request.signal πŸ“‹Firefox11/14/2017 Safari3/25/2019496
api.ShadowRoot.styleSheets πŸ“‹Firefox10/23/2018 Safari3/25/2019153
api.SourceBuffer.changeType πŸ“‹Firefox10/23/2018 Safari3/25/2019153
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.VTTRegion.lines πŸ“‹Firefox3/13/2018 Safari3/25/2019377
api.Worker.Worker.options_name_parameter Firefox8/8/2017 Safari3/25/2019594
css.at-rules.font-face.OpenType_SVG Firefox7/22/2014 Safari3/25/20191707
css.properties.block-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.block-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.block-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.border-block-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-color πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-color.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-color.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-style.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-width πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-width.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-width.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-end-width.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-color πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-color.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-color.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-style.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-width πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-width.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-width.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-block-start-width.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-color πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-color.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-color.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-style.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-width πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-width.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-width.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-end-width.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-color πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-color.currentColor πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-color.transparent πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.dashed πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.dotted πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.double πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.groove πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.hidden πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.inset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.outset πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.ridge πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-style.solid πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-width πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-width.medium πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-width.thick πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.border-inline-start-width.thin πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.clip-path.is_animatable Firefox9/20/2016 Safari3/25/2019916
css.properties.column-gap.multicol_context.calc_values Firefox6/26/2018 Safari3/25/2019272
css.properties.gap.grid_context.calc_values Firefox3/7/2017 Safari3/25/2019748
css.properties.inline-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.inline-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.inline-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.margin-block-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-block-end.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-block-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-block-start.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-inline-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-inline-end.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-inline-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.margin-inline-start.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.max-block-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.max-block-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.max-block-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.max-block-size.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.max-inline-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.max-inline-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.max-inline-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.max-inline-size.none πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.min-block-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.min-block-size.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.min-block-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.min-block-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.min-inline-size πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.min-inline-size.auto πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.min-inline-size.max-content Firefox3/19/2019 Safari3/25/20196
css.properties.min-inline-size.min-content Firefox3/19/2019 Safari3/25/20196
css.properties.padding-block-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.padding-block-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.padding-inline-end πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.padding-inline-start πŸ“‹Firefox9/22/2015 Safari3/25/20191280
css.properties.text-decoration-color πŸ“‹Firefox2/24/2015 Safari3/25/20191490
css.properties.text-decoration-line πŸ“‹Firefox2/24/2015 Safari3/25/20191490
css.properties.text-decoration-style πŸ“‹Firefox2/24/2015 Safari3/25/20191490
css.types.color.hsl.alpha_parameter Firefox3/7/2017 Safari3/25/2019748
css.types.color.hsl.space_separated_parameters Firefox3/7/2017 Safari3/25/2019748
css.types.color.rgb.alpha_parameter Firefox3/7/2017 Safari3/25/2019748
css.types.color.rgb.float_values Firefox3/7/2017 Safari3/25/2019748
css.types.color.rgb.space_separated_parameters Firefox3/7/2017 Safari3/25/2019748
css.types.gradient.linear-gradient.doubleposition Firefox12/11/2018 Safari3/25/2019104
css.types.gradient.radial-gradient.doubleposition Firefox12/11/2018 Safari3/25/2019104
css.types.gradient.repeating-linear-gradient.doubleposition Firefox12/11/2018 Safari3/25/2019104
css.types.gradient.repeating-radial-gradient.doubleposition Firefox12/11/2018 Safari3/25/2019104
html.elements.datalist πŸ“‹Firefox3/22/2011 Safari3/25/20192925
Firefox for Android: The dropdown menu containing available options does not appear. See bug 1535985.
html.elements.datalist.input_type_email πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.datalist.input_type_number πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.datalist.input_type_search πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.datalist.input_type_tel πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.datalist.input_type_text πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.datalist.input_type_url πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.input.type_color πŸ“‹Firefox4/29/2014 Safari3/25/20191791
Firefox for Android: Firefox for Android doesn't allow the user to choose a custom color, only one of the predefined ones.
html.elements.input.type_email.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.input.type_number.list πŸ“‹Firefox4/29/2014 Safari3/25/20191791
html.elements.input.type_search.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.input.type_tel.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.input.type_text.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
html.elements.input.type_url.list πŸ“‹Firefox3/22/2011 Safari3/25/20192925
javascript.builtins.JSON.stringify.well_formed_stringify Firefox12/11/2018 Safari3/25/2019104
javascript.builtins.Object.fromEntries πŸ“‹Firefox10/23/2018 Safari3/25/2019153
javascript.builtins.Symbol.description πŸ“‹Firefox10/23/2018 Safari3/25/2019153
Safari: No support for an undefined description.Safari on iOS: No support for an undefined description.WebView on iOS: No support for an undefined description.
javascript.builtins.globalThis πŸ“‹Firefox1/29/2019 Safari3/25/201955
api.Event.returnValue πŸ“‹Safari6/23/2003 Firefox3/19/20195748
api.InputEvent.inputType πŸ“‹Safari3/27/2017 Firefox3/19/2019722
api.Window.event πŸ“‹Safari10/24/2003 Firefox3/19/20195625
css.properties.height.max-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.height.min-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.max-height.max-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.max-height.min-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.max-width.max-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.max-width.min-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.min-height.max-content Safari9/19/2017 Firefox3/19/2019546
css.properties.min-height.min-content Safari9/19/2017 Firefox3/19/2019546
css.properties.min-width.max-content Safari9/19/2017 Firefox3/19/2019546
css.properties.min-width.min-content Safari9/19/2017 Firefox3/19/2019546
css.properties.width.max-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546
css.properties.width.min-content πŸ“‹Safari9/19/2017 Firefox3/19/2019546

2019/1

API First Browser Date Last Browser Date Days Notes
api.ByteLengthQueuingStrategy πŸ“‹Safari3/27/2017 Firefox1/29/2019673
Node.js: Available as a part of the stream/web module.
api.ByteLengthQueuingStrategy.ByteLengthQueuingStrategy πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ByteLengthQueuingStrategy.highWaterMark πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ByteLengthQueuingStrategy.size πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.CountQueuingStrategy πŸ“‹Safari3/27/2017 Firefox1/29/2019673
Node.js: Available as a part of the stream/web module.
api.CountQueuingStrategy.CountQueuingStrategy πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.CountQueuingStrategy.highWaterMark πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.CountQueuingStrategy.size πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.Document.hasStorageAccess πŸ“‹Safari4/12/2018 Firefox1/29/2019292
api.Document.requestStorageAccess πŸ“‹Safari4/12/2018 Firefox1/29/2019292
Safari: Client-side storage access is granted per-page (see explanation).Safari on iOS: Client-side storage access is granted per-page (see explanation).WebView on iOS: Client-side storage access is granted per-page (see explanation).
api.HTMLMarqueeElement πŸ“‹Safari2/2/2004 Firefox1/29/20195475
Firefox: Before Firefox 65, <marquee> implemented the HTMLDivElement interface.Firefox for Android: Before Firefox for Android 65, <marquee> implemented the HTMLDivElement interface.
api.HTMLMarqueeElement.behavior πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.bgColor πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.direction πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.height πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.hspace πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.loop πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.scrollAmount πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.scrollDelay πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.start πŸ“‹Safari2/2/2004 Firefox1/29/20195475
api.HTMLMarqueeElement.stop πŸ“‹Safari2/2/2004 Firefox1/29/20195475
api.HTMLMarqueeElement.trueSpeed πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.vspace πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.HTMLMarqueeElement.width πŸ“‹Safari7/20/2011 Firefox1/29/20192750
api.ReadableStream πŸ“‹Safari3/27/2017 Firefox1/29/2019673
Node.js: Available as a part of the stream/web module.
api.ReadableStream.ReadableStream πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ReadableStream.cancel πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ReadableStream.getReader πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ReadableStream.locked πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ReadableStream.tee πŸ“‹Safari3/27/2017 Firefox1/29/2019673
Node.js: Before 18.10.0 or 16.18.0, teeing a readable byte stream is not supported.
api.ReadableStreamDefaultController πŸ“‹Safari9/20/2016 Firefox1/29/2019861
Deno: ReadableStreamDefaultController is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.ReadableStreamDefaultController.close πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultController.desiredSize πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultController.enqueue πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultController.error πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultReader πŸ“‹Safari9/20/2016 Firefox1/29/2019861
Deno: ReadableStreamDefaultReader is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.ReadableStreamDefaultReader.cancel πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultReader.closed πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultReader.read πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.ReadableStreamDefaultReader.releaseLock πŸ“‹Safari9/20/2016 Firefox1/29/2019861
api.Response.body πŸ“‹Safari3/27/2017 Firefox1/29/2019673
api.ServiceWorkerGlobalScope.messageerror_event πŸ“‹Safari4/12/2018 Firefox1/29/2019292
Safari: Although the onmessageerror property is supported, the messageerror event is never fired. See bug 272967.Safari on iOS: Although the onmessageerror property is supported, the messageerror event is never fired. See bug 272967.
api.Window.open.once_per_event Safari9/19/2017 Firefox1/29/2019497
css.properties.break-after πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.auto Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.left Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.page Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.paged_context πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.paged_context.page Safari9/20/2016 Firefox1/29/2019861
css.properties.break-after.right Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.auto Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.left Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.page Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.paged_context πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.paged_context.page Safari9/20/2016 Firefox1/29/2019861
css.properties.break-before.right Safari9/20/2016 Firefox1/29/2019861
css.properties.break-inside πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-inside.auto Safari9/20/2016 Firefox1/29/2019861
css.properties.break-inside.avoid Safari9/20/2016 Firefox1/29/2019861
css.properties.break-inside.multicol_context πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.break-inside.paged_context πŸ“‹Safari9/20/2016 Firefox1/29/2019861
css.properties.image-rendering.crisp-edges πŸ“‹Safari10/22/2013 Firefox1/29/20191925
css.types.env πŸ“‹Safari4/12/2018 Firefox1/29/2019292
css.types.env.safe-area-inset-bottom πŸ“‹Safari9/19/2017 Firefox1/29/2019497
css.types.env.safe-area-inset-left πŸ“‹Safari9/19/2017 Firefox1/29/2019497
css.types.env.safe-area-inset-right πŸ“‹Safari9/19/2017 Firefox1/29/2019497
css.types.env.safe-area-inset-top πŸ“‹Safari9/19/2017 Firefox1/29/2019497
html.elements.iframe.sandbox.allow-storage-access-by-user-activation Safari4/12/2018 Firefox1/29/2019292
html.elements.marquee πŸ“‹Safari2/2/2004 Firefox1/29/20195475
Firefox: Implements the HTMLDivElement interface.Firefox for Android: Implements the HTMLDivElement interface.

2018/12

API First Browser Date Last Browser Date Days Notes
api.RTCRtpSender.setParameters πŸ“‹Safari9/19/2017 Firefox12/11/2018448
Firefox: Before Firefox 64, changes to parameters that should update live would not do so.Firefox for Android: Before Firefox for Android 64, changes to parameters that should update live would not do so.
api.ServiceWorkerContainer.startMessages πŸ“‹Safari4/12/2018 Firefox12/11/2018243
api.Window.screenLeft πŸ“‹Safari6/23/2003 Firefox12/11/20185650
api.Window.screenLeft.relative-multi-screen Safari6/23/2003 Firefox12/11/20185650
Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Window.screenTop πŸ“‹Safari6/23/2003 Firefox12/11/20185650
api.Window.screenTop.relative-multi-screen Safari6/23/2003 Firefox12/11/20185650
Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Window.screenY.relative-multi-screen Safari6/23/2003 Firefox12/11/20185650
Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.XMLHttpRequest.getAllResponseHeaders.header_names_lowercase Safari9/19/2017 Firefox12/11/2018448
css.at-rules.media.any-hover πŸ“‹Safari9/30/2015 Firefox12/11/20181168
css.at-rules.media.any-pointer πŸ“‹Safari9/30/2015 Firefox12/11/20181168
css.at-rules.media.hover πŸ“‹Safari9/30/2015 Firefox12/11/20181168
Chrome: Before Chrome 41, the implementation was buggy and reported (hover: none) on non-touch-based computers with a mouse/trackpad. See bug 40397980.Chrome Android: On some Android devices, such as certain Samsung models, the (hover: hover) media query may incorrectly match. See bug 41445959.Quest Browser: On some Android devices, such as certain Samsung models, the (hover: hover) media query may incorrectly match. See bug 41445959.Opera: Before Opera 28, the implementation was buggy and reported (hover: none) on non-touch-based computers with a mouse/trackpad. See bug 40397980.Opera Android: On some Android devices, such as certain Samsung models, the (hover: hover) media query may incorrectly match. See bug 41445959.Samsung Internet: On some Android devices, such as certain Samsung models, the (hover: hover) media query may incorrectly match. See bug 41445959.WebView Android: On some Android devices, such as certain Samsung models, the (hover: hover) media query may incorrectly match. See bug 41445959.
css.at-rules.media.pointer πŸ“‹Safari9/30/2015 Firefox12/11/20181168

2018/10

API First Browser Date Last Browser Date Days Notes
api.CustomElementRegistry πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.CustomElementRegistry.define πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.CustomElementRegistry.get πŸ“‹Safari3/27/2017 Firefox10/23/2018575
Safari: Supports 'Autonomous custom elements' but not 'Customized built-in elements'. See bug 182671.Safari on iOS: Supports 'Autonomous custom elements' but not 'Customized built-in elements'. See bug 182671.WebView on iOS: Supports 'Autonomous custom elements' but not 'Customized built-in elements'. See bug 182671.
api.CustomElementRegistry.whenDefined πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.Element.assignedSlot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.Element.attachShadow πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.Element.securitypolicyviolation_event πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.Element.shadowRoot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.Element.slot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.Element.toggleAttribute πŸ“‹Safari9/17/2018 Firefox10/23/201836
api.HTMLCanvasElement.getContext.webgl_context.options_powerPreference_parameter πŸ“‹Safari3/27/2017 Firefox10/23/2018575
Chrome: Chrome respects the GPU hint on macOS only.Chrome Android: Chrome Android respects the GPU hint on macOS only.Edge: Edge respects the GPU hint on macOS only.Firefox: Firefox respects the GPU hint on macOS only.Quest Browser: Quest Browser respects the GPU hint on macOS only.Opera: Opera respects the GPU hint on macOS only.Opera Android: Opera Android respects the GPU hint on macOS only.Samsung Internet: Samsung Internet respects the GPU hint on macOS only.WebView Android: WebView Android respects the GPU hint on macOS only.
api.HTMLImageElement.decoding πŸ“‹Safari4/12/2018 Firefox10/23/2018194
api.HTMLSlotElement πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.HTMLSlotElement.assignedNodes πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.HTMLSlotElement.name πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.HTMLSlotElement.slotchange_event πŸ“‹Safari3/27/2017 Firefox10/23/2018575
Safari: The onslotchange event handler property is not supported.Safari on iOS: The onslotchange event handler property is not supported.WebView on iOS: The onslotchange event handler property is not supported.
api.SecurityPolicyViolationEvent πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.SecurityPolicyViolationEvent πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.blockedURI πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.columnNumber πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.documentURI πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.effectiveDirective πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.lineNumber πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.originalPolicy πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.referrer πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.sourceFile πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.statusCode πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.SecurityPolicyViolationEvent.violatedDirective πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.ShadowRoot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.ShadowRoot.activeElement πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.ShadowRoot.elementFromPoint Safari3/27/2017 Firefox10/23/2018575
Chrome: Before Chrome 66, this method returned null when the element was a child of a host node. See bug 40537452.Chrome Android: Before Chrome Android 66, this method returned null when the element was a child of a host node. See bug 40537452.Quest Browser: Before Quest Browser 5.0, this method returned null when the element was a child of a host node. See bug 40537452.Opera: Before Opera 53, this method returned null when the element was a child of a host node. See bug 40537452.Opera Android: Before Opera Android 47, this method returned null when the element was a child of a host node. See bug 40537452.Samsung Internet: Before Samsung Internet 9.0, this method returned null when the element was a child of a host node. See bug 40537452.WebView Android: Before WebView Android 66, this method returned null when the element was a child of a host node. See bug 40537452.
api.ShadowRoot.elementsFromPoint Safari4/12/2018 Firefox10/23/2018194
Chrome: Before Chrome 66, this method returned null when the element was a child of a host node. See bug 40537452.Chrome Android: Before Chrome Android 66, this method returned null when the element was a child of a host node. See bug 40537452.Quest Browser: Before Quest Browser 5.0, this method returned null when the element was a child of a host node. See bug 40537452.Samsung Internet: Before Samsung Internet 9.0, this method returned null when the element was a child of a host node. See bug 40537452.WebView Android: Before WebView Android 66, this method returned null when the element was a child of a host node. See bug 40537452.
api.ShadowRoot.host πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.ShadowRoot.innerHTML πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.ShadowRoot.mode πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.ShadowRoot.pointerLockElement πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.Text.assignedSlot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
api.TextDecoder.ignoreBOM πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.Window.customElements πŸ“‹Safari3/27/2017 Firefox10/23/2018575
api.WorkerGlobalScope.securitypolicyviolation_event πŸ“‹Safari9/20/2016 Firefox10/23/2018763
css.at-rules.media.-webkit-device-pixel-ratio πŸ“‹Safari10/26/2007 Firefox10/23/20184015
Firefox: Implemented as an alias for -moz-device-pixel-ratio.Firefox for Android: Implemented as an alias for -moz-device-pixel-ratio.
css.at-rules.media.-webkit-max-device-pixel-ratio πŸ“‹Safari10/26/2007 Firefox10/23/20184015
Firefox: Implemented as an alias for max--moz-device-pixel-ratio.Firefox for Android: Implemented as an alias for max--moz-device-pixel-ratio.
css.at-rules.media.-webkit-min-device-pixel-ratio πŸ“‹Safari10/26/2007 Firefox10/23/20184015
Firefox: Implemented as an alias for min--moz-device-pixel-ratio.Firefox for Android: Implemented as an alias for min--moz-device-pixel-ratio.
css.at-rules.media.prefers-reduced-motion πŸ“‹Safari3/27/2017 Firefox10/23/2018575
css.properties.content.element_replacement Safari9/30/2015 Firefox10/23/20181119
css.selectors.defined πŸ“‹Safari9/20/2016 Firefox10/23/2018763
css.selectors.host πŸ“‹Safari9/20/2016 Firefox10/23/2018763
css.selectors.hostfunction πŸ“‹Safari9/20/2016 Firefox10/23/2018763
Safari: Certain CSS selectors do not work (:host > .local-child) and styling slotted content (::slotted) is buggy.Safari on iOS: Certain CSS selectors do not work (:host > .local-child) and styling slotted content (::slotted) is buggy.WebView on iOS: Certain CSS selectors do not work (:host > .local-child) and styling slotted content (::slotted) is buggy.
css.selectors.slotted πŸ“‹Safari9/20/2016 Firefox10/23/2018763
html.elements.img.decoding πŸ“‹Safari4/12/2018 Firefox10/23/2018194
html.elements.slot πŸ“‹Safari9/20/2016 Firefox10/23/2018763
html.elements.slot.name Safari9/20/2016 Firefox10/23/2018763
html.global_attributes.slot πŸ“‹Safari9/20/2016 Firefox10/23/2018763

2018/9

API First Browser Date Last Browser Date Days Notes
api.CustomEvent.worker_support Firefox8/2/2016 Safari9/17/2018776
api.DOMTokenList.replace.boolean_value Firefox6/26/2018 Safari9/17/201883
api.PerformanceResourceTiming.worker_support Firefox5/9/2018 Safari9/17/2018131
api.RTCPeerConnectionIceEvent πŸ“‹Firefox9/17/2013 Safari9/17/20181826
api.RTCPeerConnectionIceEvent.RTCPeerConnectionIceEvent πŸ“‹Firefox9/17/2013 Safari9/17/20181826
api.RTCPeerConnectionIceEvent.candidate πŸ“‹Firefox9/17/2013 Safari9/17/20181826
api.SVGGeometryElement πŸ“‹Firefox4/19/2017 Safari9/17/2018516
Chrome: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Chrome Android: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Edge: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Firefox: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Firefox for Android: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Internet Explorer: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Opera: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Opera Android: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Safari: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Safari on iOS: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.Samsung Internet: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.WebView Android: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.WebView on iOS: The SVGGeometryElement interface itself is not present, but some of its members are available on the SVGPathElement interface.
api.SVGGeometryElement.getPointAtLength πŸ“‹Firefox6/26/2018 Safari9/17/201883
Chrome: Only supported for SVGPathElement, not all SVGGeometryElement objects.Chrome Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Edge: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox for Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Internet Explorer: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.Samsung Internet: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.
api.SVGGeometryElement.getTotalLength πŸ“‹Firefox6/26/2018 Safari9/17/201883
Chrome: Only supported for SVGPathElement, not all SVGGeometryElement objects.Chrome Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Edge: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox for Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Internet Explorer: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.Samsung Internet: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.
api.SVGGeometryElement.pathLength πŸ“‹Firefox6/26/2018 Safari9/17/201883
Chrome: Only supported for SVGPathElement, not all SVGGeometryElement objects.Chrome Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox: Only supported for SVGPathElement, not all SVGGeometryElement objects.Firefox for Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera: Only supported for SVGPathElement, not all SVGGeometryElement objects.Opera Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari: Only supported for SVGPathElement, not all SVGGeometryElement objects.Safari on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.Samsung Internet: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView Android: Only supported for SVGPathElement, not all SVGGeometryElement objects.WebView on iOS: Only supported for SVGPathElement, not all SVGGeometryElement objects.
api.WEBGL_compressed_texture_astc πŸ“‹Firefox4/19/2017 Safari9/17/2018516
api.WEBGL_compressed_texture_astc.getSupportedProfiles πŸ“‹Firefox4/19/2017 Safari9/17/2018516
css.at-rules.media.calc πŸ“‹Firefox3/13/2018 Safari9/17/2018188
css.properties.column-gap.grid_context πŸ“‹Firefox6/26/2018 Safari9/17/201883
css.properties.column-gap.multicol_context.percentage_values Firefox6/26/2018 Safari9/17/201883
css.properties.gap.grid_context πŸ“‹Firefox6/26/2018 Safari9/17/201883
css.properties.row-gap.grid_context πŸ“‹Firefox6/26/2018 Safari9/17/201883
http.headers.Set-Cookie.SameSite.Lax Firefox5/9/2018 Safari9/17/2018131
http.headers.Set-Cookie.SameSite.Strict Firefox5/9/2018 Safari9/17/2018131
javascript.builtins.Array.flat πŸ“‹Firefox9/5/2018 Safari9/17/201812
javascript.builtins.Array.flatMap πŸ“‹Firefox9/5/2018 Safari9/17/201812
javascript.builtins.AsyncGenerator πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.AsyncGenerator.next πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.AsyncGenerator.return πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.AsyncGenerator.throw πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.AsyncGeneratorFunction πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.AsyncGeneratorFunction.AsyncGeneratorFunction πŸ“‹Firefox8/8/2017 Safari9/17/2018405
javascript.builtins.JSON.json_superset Firefox9/5/2018 Safari9/17/201812
javascript.builtins.String.trimEnd πŸ“‹Firefox6/26/2018 Safari9/17/201883
javascript.builtins.String.trimStart πŸ“‹Firefox6/26/2018 Safari9/17/201883
javascript.functions.method_definitions.async_generator_methods Firefox11/14/2017 Safari9/17/2018307
javascript.operators.async_generator_function πŸ“‹Firefox11/14/2017 Safari9/17/2018307
javascript.statements.async_generator_function πŸ“‹Firefox11/14/2017 Safari9/17/2018307
javascript.statements.for_await_of πŸ“‹Firefox11/14/2017 Safari9/17/2018307
api.DOMMatrixReadOnly.DOMMatrixReadOnly πŸ“‹Safari9/19/2017 Firefox9/5/2018351
api.DOMMatrixReadOnly.toJSON πŸ“‹Safari9/19/2017 Firefox9/5/2018351
api.DOMPoint.fromPoint_static πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.DOMPointReadOnly.DOMPointReadOnly πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.DOMPointReadOnly.fromPoint_static πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.DOMPointReadOnly.toJSON πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.DOMQuad.getBounds πŸ“‹Safari9/19/2017 Firefox9/5/2018351
api.DOMQuad.toJSON πŸ“‹Safari9/19/2017 Firefox9/5/2018351
api.DOMRectReadOnly.DOMRectReadOnly πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.DOMRectReadOnly.toJSON πŸ“‹Safari3/27/2017 Firefox9/5/2018527
api.Event.srcElement πŸ“‹Safari6/23/2003 Firefox9/5/20185553
api.RTCDataChannel.maxPacketLifeTime πŸ“‹Safari9/19/2017 Firefox9/5/2018351
api.RTCDataChannel.maxRetransmits πŸ“‹Safari9/19/2017 Firefox9/5/2018351
css.at-rules.font-face.font-stretch πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.at-rules.font-face.src.format_variations Safari9/19/2017 Firefox9/5/2018351
css.properties.font-variation-settings πŸ“‹Safari9/19/2017 Firefox9/5/2018351
Safari: Requires macOS 10.13 High Sierra or later.Safari on iOS: Requires iOS 11 or later.WebView on iOS: Requires iOS 11 or later.
css.properties.font-variation-settings.normal πŸ“‹Safari9/19/2017 Firefox9/5/2018351
css.properties.shape-image-threshold πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-margin πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.border-box πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.circle Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.content-box πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.gradient πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.image πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.inset Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.margin-box πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.none πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.padding-box πŸ“‹Safari3/27/2017 Firefox9/5/2018527
css.properties.shape-outside.polygon Safari3/27/2017 Firefox9/5/2018527
css.selectors.selection πŸ“‹Safari10/24/2003 Firefox9/5/20185430
javascript.operators.import_meta πŸ“‹Safari4/12/2018 Firefox9/5/2018146

2018/6

API First Browser Date Last Browser Date Days Notes
api.Document.anchors πŸ“‹Safari6/8/2009 Firefox6/26/20183305
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.applets πŸ“‹Safari6/8/2009 Firefox6/26/20183305
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.embeds πŸ“‹Safari3/27/2017 Firefox6/26/2018456
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.forms πŸ“‹Safari6/8/2009 Firefox6/26/20183305
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.head πŸ“‹Safari6/7/2010 Firefox6/26/20182941
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.images πŸ“‹Safari6/8/2009 Firefox6/26/20183305
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.links πŸ“‹Safari6/8/2009 Firefox6/26/20183305
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.plugins πŸ“‹Safari3/27/2017 Firefox6/26/2018456
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.scripts πŸ“‹Safari3/27/2017 Firefox6/26/2018456
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.EventTarget.addEventListener.options_parameter.options_passive_parameter_default_true_touch Safari4/12/2018 Firefox6/26/201875
api.Request.destination πŸ“‹Safari3/27/2017 Firefox6/26/2018456
css.properties.font-stretch.percentage Safari4/12/2018 Firefox6/26/201875
css.properties.font-style.oblique-angle πŸ“‹Safari4/12/2018 Firefox6/26/201875
Chrome: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Chrome Android: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Edge: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Quest Browser: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Opera: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Opera Android: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Safari: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Safari on iOS: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.Samsung Internet: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.WebView Android: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.WebView on iOS: Angles from 14 to 90 have the same effect as font-style: oblique (with a slant of 14 degrees). Angles from -90 to 13 have the same effect as font-style: normal (without a slant). In some cases (e.g. with vertical writing-mode), a negative angle produces a slant. See bug 425388876.
css.properties.font-weight.number Safari9/19/2017 Firefox6/26/2018280

2018/5

API First Browser Date Last Browser Date Days Notes
api.Document.body πŸ“‹Safari6/23/2003 Firefox5/9/20185434
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.HTMLScriptElement.noModule πŸ“‹Safari9/19/2017 Firefox5/9/2018232
api.Navigator.webdriver πŸ“‹Safari3/27/2017 Firefox5/9/2018408
api.PerformanceEntry.worker_support Safari9/19/2017 Firefox5/9/2018232
Node.js: Available as a part of the perf_hooks module.
css.properties.paint-order πŸ“‹Safari9/19/2017 Firefox5/9/2018232
Chrome: Does not affect stroked HTML text, see bug 41372165Chrome Android: Does not affect stroked HTML text, see bug 41372165Edge: Does not affect stroked HTML text, see bug 41372165Quest Browser: Does not affect stroked HTML text, see bug 41372165Opera: Does not affect stroked HTML text, see bug 41372165Opera Android: Does not affect stroked HTML text, see bug 41372165Safari: Does not affect stroked HTML text, see bug 168601Safari on iOS: Does not affect stroked HTML text, see bug 168601Samsung Internet: Does not affect stroked HTML text, see bug 41372165WebView Android: Does not affect stroked HTML text, see bug 41372165WebView on iOS: Does not affect stroked HTML text, see bug 168601
css.properties.paint-order.fill πŸ“‹Safari10/16/2014 Firefox5/9/20181301
css.properties.paint-order.markers πŸ“‹Safari10/16/2014 Firefox5/9/20181301
css.properties.paint-order.normal πŸ“‹Safari10/16/2014 Firefox5/9/20181301
css.properties.paint-order.stroke πŸ“‹Safari10/16/2014 Firefox5/9/20181301
html.elements.script.nomodule πŸ“‹Safari9/19/2017 Firefox5/9/2018232
html.elements.script.type.module Safari3/27/2017 Firefox5/9/2018408
Chrome: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Chrome Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Edge: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Quest Browser: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Opera: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Opera Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.Safari: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).Safari on iOS: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).Samsung Internet: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.WebView Android: Module scripts without the async attribute do not load when the page is served as XHTML (application/xhtml+xml). See bug 40518469.WebView on iOS: Module scripts do not load when the page is served as XHTML (application/xhtml+xml).
javascript.builtins.Array.values πŸ“‹Safari9/30/2015 Firefox5/9/2018952
javascript.statements.export πŸ“‹Safari3/27/2017 Firefox5/9/2018408
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.export.default πŸ“‹Safari3/27/2017 Firefox5/9/2018408
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.
javascript.statements.import πŸ“‹Safari3/27/2017 Firefox5/9/2018408
Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.Node.js: Modules must either have a filename ending in .mjs, or the nearest parent package.json file must contain "type": "module". See Node's ECMAScript Modules documentation for more details.

2018/4

API First Browser Date Last Browser Date Days Notes
api.AbortSignal πŸ“‹Firefox11/14/2017 Safari4/12/2018149
api.AbortSignal.abort_event πŸ“‹Firefox11/14/2017 Safari4/12/2018149
api.AbortSignal.aborted πŸ“‹Firefox11/14/2017 Safari4/12/2018149
api.Cache πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.Chrome Android: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.Quest Browser: Before version 5.0, only service workers are supported. From version 5.0, all worker types and the main thread are supported.Opera: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.Opera Android: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.WebView Android: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.
api.Cache.add πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: Requires HTTPS from version 46.Chrome Android: Requires HTTPS from version 46.Quest Browser: Requires HTTPS from version 5.0.Opera: Requires HTTPS from version 33.Opera Android: Requires HTTPS from version 33.Samsung Internet: Requires HTTPS from Samsung Internet 5.0.WebView Android: Requires HTTPS from version 46.
api.Cache.addAll πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: Requires HTTPS.Chrome Android: Requires HTTPS.Quest Browser: Requires HTTPS.Opera: Requires HTTPS.Opera Android: Requires HTTPS.Samsung Internet: Requires HTTPS.WebView Android: Requires HTTPS.
api.Cache.delete πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Deno: Doesn't support query options
api.Cache.keys πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.Cache.match πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Deno: Doesn't support query options
api.Cache.matchAll πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Opera: Requires HTTPS.
api.Cache.put πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: Requires HTTPS from version 46.Chrome Android: Requires HTTPS from version 46.Quest Browser: Requires HTTPS from version 5.0.Opera: Requires HTTPS from version 33.Opera Android: Requires HTTPS from version 33.Samsung Internet: Requires HTTPS from Samsung Internet 5.0.WebView Android: Requires HTTPS from version 46.
api.Cache.worker_support Firefox1/26/2016 Safari4/12/2018807
Chrome: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.Chrome Android: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.Quest Browser: Before version 5.0, only service workers are supported. From version 5.0, all worker types and the main thread are supported.Opera: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.Opera Android: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.WebView Android: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.
api.CacheStorage πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: Only available in service workers.Chrome Android: Only available in service workers.Opera: Only available in service workers.Opera Android: Only available in service workers.WebView Android: Only available in service workers.
api.CacheStorage.delete πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.CacheStorage.has πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.CacheStorage.keys πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.CacheStorage.match πŸ“‹Firefox9/22/2015 Safari4/12/2018933
Chrome: The options parameter only supports ignoreSearch, and cacheName.Chrome Android: The options parameter only supports ignoreSearch, and cacheName.Opera: The options parameter only supports ignoreSearch, and cacheName.Opera Android: The options parameter only supports ignoreSearch, and cacheName.Samsung Internet: The options parameter only supports ignoreSearch, and cacheName.WebView Android: The options parameter only supports ignoreSearch, and cacheName.
api.CacheStorage.open πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.CacheStorage.secure_context_required Firefox1/26/2016 Safari4/12/2018807
api.CacheStorage.worker_support Firefox1/26/2016 Safari4/12/2018807
Chrome: Only available in service workers.Chrome Android: Only available in service workers.Opera: Only available in service workers.Opera Android: Only available in service workers.WebView Android: Only available in service workers.
api.CanvasPattern.setTransform πŸ“‹Firefox10/14/2014 Safari4/12/20181276
api.Client πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Client.frameType πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Client.id πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Client.postMessage πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Client.type πŸ“‹Firefox6/13/2017 Safari4/12/2018303
api.Client.url πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Clients πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Clients.claim πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.Clients.get πŸ“‹Firefox3/8/2016 Safari4/12/2018765
api.Clients.matchAll πŸ“‹Firefox6/13/2017 Safari4/12/2018303
Chrome: Client objects returned in most recent focus order.Chrome Android: Client objects returned in most recent focus order.Edge: Client objects returned in most recent focus order.Firefox: Before Firefox 54, Client objects were not returned in the most recent focus order as required by the specification.Firefox for Android: Before Firefox for Android 54, Client objects were not returned in the most recent focus order as required by the specification.Quest Browser: Client objects returned in most recent focus order.Samsung Internet: Client objects returned in most recent focus order.WebView Android: Client objects returned in most recent focus order.
api.Clients.matchAll.options_includeUncontrolled_parameter πŸ“‹Firefox1/26/2016 Safari4/12/2018807
Chrome: Client objects returned in most recent focus order.Chrome Android: Client objects returned in most recent focus order.Edge: Client objects returned in most recent focus order.Quest Browser: Client objects returned in most recent focus order.Samsung Internet: Client objects returned in most recent focus order.WebView Android: Client objects returned in most recent focus order.
api.Clients.openWindow πŸ“‹Firefox1/26/2016 Safari4/12/2018807
Chrome: Before Chrome 43, this method could only open URLs on the same origin.Chrome: Since Chrome 51, URLs may open inside an existing browsing context provided by a standalone web app.Chrome Android: Before Chrome Android 43, this method could only open URLs on the same origin.Chrome Android: Since Chrome Android 51, URLs may open inside an existing browsing context provided by a standalone web app.Quest Browser: Before Quest Browser 5.0, this method could only open URLs on the same origin.Quest Browser: Since Quest Browser 5.0, URLs may open inside an existing browsing context provided by a standalone web app.Samsung Internet: Before Samsung Internet 4.0, this method could only open URLs on the same origin.Samsung Internet: Since Samsung Internet 5.0, URLs may open inside an existing browsing context provided by a standalone web app.WebView Android: Before WebView Android 43, this method could only open URLs on the same origin.WebView Android: Since WebView Android 51, URLs may open inside an existing browsing context provided by a standalone web app.
api.DataTransfer.items πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.DataTransferItem.webkitGetAsEntry πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.Document.elementsFromPoint πŸ“‹Firefox4/26/2016 Safari4/12/2018716
Chrome: Before Chrome 66, this method returned null when the element was a child of a host node. See bug 40537452.Chrome Android: Before Chrome Android 66, this method returned null when the element was a child of a host node. See bug 40537452.Edge: Returns a NodeList instead of an array. See the MSDN documentation. Returns null when the point provided has no elements beneath it (e.g., when given a point outside the document).Internet Explorer: Returns a NodeList instead of an array. See the MSDN documentation. Returns null when the point provided has no elements beneath it (e.g., when given a point outside the document).Quest Browser: Before Quest Browser 5.0, this method returned null when the element was a child of a host node. See bug 40537452.Samsung Internet: Before Samsung Internet 9.0, this method returned null when the element was a child of a host node. See bug 40537452.WebView Android: Before WebView Android 66, this method returned null when the element was a child of a host node. See bug 40537452.
api.ExtendableEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableEvent.ExtendableEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableEvent.waitUntil πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableEvent.waitUntil.async_waitUntil Firefox4/19/2017 Safari4/12/2018358
api.ExtendableMessageEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.ExtendableMessageEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.data πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.lastEventId πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.origin πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.ports πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ExtendableMessageEvent.source πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.FetchEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.FetchEvent.FetchEvent πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.FetchEvent.clientId πŸ“‹Firefox3/8/2016 Safari4/12/2018765
api.FetchEvent.request πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.FetchEvent.respondWith πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.File.webkitRelativePath πŸ“‹Firefox11/15/2016 Safari4/12/2018513
Firefox for Android: Always an empty string (bug 1973726).
api.FileSystem πŸ“‹Firefox11/15/2016 Safari4/12/2018513
Edge: Before Edge 79, this API was only supported in drag-and-drop scenarios using the DataTransferItem.webkitGetAsEntry() method. It was not available for use in file or folder picker panels (such as when you use an <input> element with the HTMLInputElement.webkitdirectory attribute.
api.FileSystem.name πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystem.root πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemDirectoryEntry πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemDirectoryEntry.createReader πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemDirectoryEntry.getDirectory πŸ“‹Firefox11/15/2016 Safari4/12/2018513
Firefox: In Firefox, the errorCallback's input parameter is a DOMException rather than a FileError object.Firefox for Android: In Firefox for Android, the errorCallback's input parameter is a DOMException rather than a FileError object.
api.FileSystemDirectoryEntry.getFile πŸ“‹Firefox11/15/2016 Safari4/12/2018513
Firefox: In Firefox, the errorCallback's input parameter is a DOMException rather than a FileError object.Firefox for Android: In Firefox for Android, the errorCallback's input parameter is a DOMException rather than a FileError object.
api.FileSystemDirectoryReader πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemDirectoryReader.readEntries πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry.filesystem πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry.fullPath πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry.getParent πŸ“‹Firefox3/7/2017 Safari4/12/2018401
api.FileSystemEntry.isDirectory πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry.isFile πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemEntry.name πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemFileEntry πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FileSystemFileEntry.file πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.FontFace.display πŸ“‹Firefox1/23/2018 Safari4/12/201879
api.FormData.@@iterator Firefox1/26/2016 Safari4/12/2018807
api.FormData.delete πŸ“‹Firefox7/2/2015 Safari4/12/20181015
api.FormData.entries Firefox1/26/2016 Safari4/12/2018807
api.FormData.forEach Firefox6/7/2016 Safari4/12/2018674
api.FormData.get πŸ“‹Firefox7/2/2015 Safari4/12/20181015
api.FormData.getAll πŸ“‹Firefox7/2/2015 Safari4/12/20181015
api.FormData.has πŸ“‹Firefox7/2/2015 Safari4/12/20181015
api.FormData.keys Firefox1/26/2016 Safari4/12/2018807
api.FormData.set πŸ“‹Firefox7/2/2015 Safari4/12/20181015
api.FormData.values Firefox1/26/2016 Safari4/12/2018807
api.HTMLCanvasElement.getContext.bitmaprenderer_context Firefox4/26/2016 Safari4/12/2018716
api.HTMLInputElement.webkitEntries πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.HTMLInputElement.webkitdirectory πŸ“‹Firefox11/15/2016 Safari4/12/2018513
Chrome Android: In Chrome for Android 131, if a user selects a directory, the browser crashes (see bug 376834374).Chrome Android: The property reflects the attribute, but users cannot choose a directory, only individual files (see bug 40248532.Firefox for Android: File entries returned for a selected directory have an empty string for webkitRelativePath (bug 1973726).Quest Browser: The property reflects the attribute, but users cannot choose a directory, only individual files (see bug 40248532.Opera Android: The property reflects the attribute, but users cannot choose a directory, only individual files (see bug 40248532.Safari on iOS: The property can be set, but has no effect (see bug 271705).Samsung Internet: The property reflects the attribute, but users cannot choose a directory, only individual files (see bug 40248532.WebView Android: In Chrome for Android 131, if a user selects a directory, the browser crashes (see bug 376834374).WebView Android: The property reflects the attribute, but users cannot choose a directory, only individual files (see bug 40248532.WebView on iOS: The property can be set, but has no effect (see bug 271705).
api.HTMLLinkElement.integrity πŸ“‹Firefox12/15/2015 Safari4/12/2018849
api.HTMLScriptElement.integrity πŸ“‹Firefox12/15/2015 Safari4/12/2018849
api.ImageBitmapRenderingContext πŸ“‹Firefox4/26/2016 Safari4/12/2018716
api.ImageBitmapRenderingContext.transferFromImageBitmap πŸ“‹Firefox11/15/2016 Safari4/12/2018513
api.MouseEvent.buttons πŸ“‹Firefox8/28/2012 Safari4/12/20182053
Firefox: Restrictions apply depending on OS.
api.Navigator.sendBeacon πŸ“‹Firefox7/22/2014 Safari4/12/20181360
Chrome: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.Chrome Android: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.Quest Browser: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.Opera: Starting in Opera 46, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.Opera Android: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.Samsung Internet: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.WebView Android: Starting in Chrome 59, this method cannot send a Blob whose type is not CORS safelisted. This is a temporary change until a mitigation can be found for the security issues that this creates. For more information, see bug 40087600.
api.Navigator.serviceWorker πŸ“‹Firefox1/26/2016 Safari4/12/2018807
Firefox: In Firefox private windows, the serviceWorker object is undefined. See bug 1320796.Firefox for Android: In Firefox for Android private windows, the serviceWorker object is undefined. See bug 1320796.
api.PaymentRequest πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.PaymentRequest πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.abort πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.canMakePayment πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.id πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.merchantvalidation_event Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.shippingAddress Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.shippingOption Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.shippingType Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.shippingaddresschange_event Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.shippingoptionchange_event Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequest.show πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequestUpdateEvent πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequestUpdateEvent.PaymentRequestUpdateEvent πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentRequestUpdateEvent.updateWith πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.complete πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.details πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.methodName πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.payerEmail πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.payerName πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.payerPhone πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.requestId πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.shippingAddress πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.shippingOption πŸ“‹Firefox8/8/2017 Safari4/12/2018247
api.PaymentResponse.toJSON Firefox8/8/2017 Safari4/12/2018247
api.ServiceWorker πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorker.error_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorker.postMessage πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorker.scriptURL πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorker.state πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorker.statechange_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.controller πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.controllerchange_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.getRegistration πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.getRegistrations πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.message_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.ready πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerContainer.register πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.activate_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.clients πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.fetch_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.install_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
Firefox: The install event handler is called with an ExtendableEvent, not an InstallEvent.Firefox for Android: The install event handler is called with an ExtendableEvent, not an InstallEvent.Safari: Returns ExtendableEvent instead of InstallEvent.Safari on iOS: Returns ExtendableEvent instead of InstallEvent.
api.ServiceWorkerGlobalScope.message_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.registration πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerGlobalScope.skipWaiting πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.active πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.installing πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.scope πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.unregister πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.update πŸ“‹Firefox1/26/2016 Safari4/12/2018807
Chrome: Starting with Chrome 46, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Chrome: Before Chrome 48, this method always bypassed the browser cache. Starting with Chrome 48, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.Chrome Android: Starting with Chrome Android 46, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Chrome Android: Before Chrome Android 48, this method always bypassed the browser cache. Starting with Chrome Android 48, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.Quest Browser: Starting with Quest Browser 5.0, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Quest Browser: Before Quest Browser 5.0, this method always bypassed the browser cache. Starting with Quest Browser 5.0, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.Opera: Starting with Opera 33, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Opera: Before Opera 35, this method always bypassed the browser cache. Starting with Opera 35, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.Opera Android: Starting with Opera Android 33, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Opera Android: Before Opera Android 35, this method always bypassed the browser cache. Starting with Opera Android 35, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.Samsung Internet: Starting with Samsung Internet 5.0, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.Samsung Internet: Before Samsung Internet 5.0, this method always bypassed the browser cache. Starting with Samsung Internet 5.0, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.WebView Android: Starting with WebView Android 46, update() returns a promise that resolves with 'undefined' if the operation completed successfully or there was no update, and rejects if update failed. If the new worker ran but installation failed, the promise still resolves. Formerly, it raised an exception.WebView Android: Before WebView Android 48, this method always bypassed the browser cache. Starting with WebView Android 48, it only bypasses the cache when the previous service worker check was more than twenty-four hours ago.
api.ServiceWorkerRegistration.updateViaCache πŸ“‹Firefox11/14/2017 Safari4/12/2018149
api.ServiceWorkerRegistration.updatefound_event πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.ServiceWorkerRegistration.waiting πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.WindowClient πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.WindowClient.focus πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.WindowClient.focused πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.WindowClient.visibilityState πŸ“‹Firefox1/26/2016 Safari4/12/2018807
api.caches πŸ“‹Firefox9/22/2015 Safari4/12/2018933
api.caches.worker_support Firefox9/22/2015 Safari4/12/2018933
api.fetch.init_referrerPolicy_parameter Firefox3/7/2017 Safari4/12/2018401
api.fetch.init_signal_parameter Firefox11/14/2017 Safari4/12/2018149
api.isSecureContext πŸ“‹Firefox9/20/2016 Safari4/12/2018569
api.isSecureContext.worker_support Firefox3/7/2017 Safari4/12/2018401
css.at-rules.font-face.OpenType_COLRv0 Firefox7/22/2014 Safari4/12/20181360
css.at-rules.font-face.font-display πŸ“‹Firefox1/23/2018 Safari4/12/201879
css.properties.caret-color πŸ“‹Firefox4/19/2017 Safari4/12/2018358
css.properties.caret-color.auto πŸ“‹Firefox4/19/2017 Safari4/12/2018358
css.properties.caret-color.currentColor πŸ“‹Firefox4/19/2017 Safari4/12/2018358
css.properties.caret-color.transparent πŸ“‹Firefox4/19/2017 Safari4/12/2018358
css.properties.display.contents πŸ“‹Firefox3/31/2015 Safari4/12/20181108
html.elements.iframe.sandbox.allow-modals πŸ“‹Firefox9/20/2016 Safari4/12/2018569
html.elements.iframe.sandbox.allow-popups-to-escape-sandbox πŸ“‹Firefox9/20/2016 Safari4/12/2018569
html.elements.input.webkitdirectory Firefox11/15/2016 Safari4/12/2018513
Chrome Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).Chrome Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.Safari on iOS: Before version 18.4, the attribute can be set but users cannot choose a directory, only individual files (see bug 271705).WebView Android: In Chrome for Android 131, choosing a directory crashes the browser (see bug 376834374).WebView Android: Before version 131, users cannot choose a directory, only individual files (see bug 40248532.WebView on iOS: Before version 18.4, the attribute can be set but users cannot choose a directory, only individual files (see bug 271705).
html.elements.link.integrity πŸ“‹Firefox12/15/2015 Safari4/12/2018849
html.elements.link.rel.preconnect πŸ“‹Firefox7/2/2015 Safari4/12/20181015
Firefox: Before Firefox 41, it doesn't obey the crossorigin attribute.Firefox for Android: Before Firefox for Android 41, it doesn't obey the crossorigin attribute.
html.elements.meta.name.referrer πŸ“‹Firefox2/24/2015 Safari4/12/20181143
Chrome: Until Chrome 46, content values weren't constrained to the values listed in the spec.Chrome Android: Until Chrome Android 46, content values weren't constrained to the values listed in the spec.Firefox: The referrer value wasn't taken into account when navigation was happening via the context menu or middle click until Firefox 39.Firefox for Android: The referrer value wasn't taken into account when navigation was happening via the context menu or middle click until Firefox for Android 39.Internet Explorer: Browsers initially supported an early draft of the specification which can only use a meta tag and is only compatible with the origin value from the new spec.Quest Browser: Until Quest Browser 5.0, content values weren't constrained to the values listed in the spec.Opera: Until Opera 33, content values weren't constrained to the values listed in the spec.Opera Android: Until Opera Android 33, content values weren't constrained to the values listed in the spec.Samsung Internet: Until Samsung Internet 5.0, content values weren't constrained to the values listed in the spec.WebView Android: Until WebView Android 46, content values weren't constrained to the values listed in the spec.
html.elements.script.integrity πŸ“‹Firefox12/15/2015 Safari4/12/2018849
http.headers.Referrer-Policy πŸ“‹Firefox11/15/2016 Safari4/12/2018513
http.headers.Referrer-Policy.same-origin Firefox3/7/2017 Safari4/12/2018401
http.headers.Referrer-Policy.strict-origin Firefox3/7/2017 Safari4/12/2018401
http.headers.Referrer-Policy.strict-origin-when-cross-origin Firefox3/7/2017 Safari4/12/2018401
http.headers.Service-Worker πŸ“‹Firefox1/26/2016 Safari4/12/2018807
http.headers.Service-Worker-Allowed πŸ“‹Firefox8/11/2015 Safari4/12/2018975
javascript.builtins.AsyncIterator πŸ“‹Firefox11/14/2017 Safari4/12/2018149
javascript.builtins.AsyncIterator.@@asyncIterator πŸ“‹Firefox11/14/2017 Safari4/12/2018149
javascript.builtins.Promise.finally πŸ“‹Firefox1/23/2018 Safari4/12/201879
javascript.builtins.Symbol.asyncIterator πŸ“‹Firefox11/14/2017 Safari4/12/2018149
javascript.operators.destructuring.rest_in_objects Firefox8/8/2017 Safari4/12/2018247
javascript.operators.object_initializer.spread_properties Firefox8/8/2017 Safari4/12/2018247
javascript.operators.spread.spread_in_object_literals πŸ“‹Firefox8/8/2017 Safari4/12/2018247
javascript.statements.try_catch.optional_catch_binding Firefox1/23/2018 Safari4/12/201879

2018/3

API First Browser Date Last Browser Date Days Notes
api.CSSNamespaceRule.namespaceURI πŸ“‹Safari3/27/2017 Firefox3/13/2018351
api.CSSNamespaceRule.prefix πŸ“‹Safari3/27/2017 Firefox3/13/2018351
api.DOMMatrixReadOnly.isIdentity πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.Event.composedPath πŸ“‹Safari9/20/2016 Firefox3/13/2018539
Node.js: Returns an array with either the event itself or empty.Node.js: This is not used in Node.js and is provided purely for completeness.
api.HTMLSelectElement.autocomplete πŸ“‹Safari3/21/2016 Firefox3/13/2018722
api.HTMLTextAreaElement.autocomplete πŸ“‹Safari3/21/2016 Firefox3/13/2018722
api.MediaStreamTrack.mute_event πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.MediaStreamTrack.muted πŸ“‹Safari9/19/2017 Firefox3/13/2018175
Firefox: Does not currently track the microphone's muted state from the operating system, see bug 1739163.Firefox for Android: Does not currently track the microphone's muted state from the operating system, see bug 1739163.
api.MediaStreamTrack.unmute_event πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCPeerConnection.addTransceiver πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCPeerConnection.addTransceiver.init_direction_parameter Safari9/19/2017 Firefox3/13/2018175
api.RTCPeerConnection.getTransceivers πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.direction πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.mid πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.receiver πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.sender πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.stop πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.RTCRtpTransceiver.stopped Safari9/19/2017 Firefox3/13/2018175
api.RTCTrackEvent.transceiver πŸ“‹Safari9/19/2017 Firefox3/13/2018175
api.Response.Response.body_parameter_optional Safari3/27/2017 Firefox3/13/2018351
api.VTTRegion πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.VTTRegion πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.id πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.regionAnchorX πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.regionAnchorY πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.scroll πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.viewportAnchorX πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.viewportAnchorY πŸ“‹Safari10/22/2013 Firefox3/13/20181603
api.VTTRegion.width πŸ“‹Safari10/22/2013 Firefox3/13/20181603
css.properties.position.position_sticky_table_elements Safari10/16/2014 Firefox3/13/20181244
Firefox: Borders do not display on table headers if border-collapse is set to collapse (bug 1727594).Firefox for Android: Borders do not display on table headers if border-collapse is set to collapse (bug 1727594).
css.selectors.placeholder-shown.non_text_types Safari9/30/2015 Firefox3/13/2018895
html.elements.select.autocomplete πŸ“‹Safari3/21/2016 Firefox3/13/2018722
html.elements.textarea.autocomplete πŸ“‹Safari3/21/2016 Firefox3/13/2018722

2018/1

API First Browser Date Last Browser Date Days Notes
api.Document.getElementsByName πŸ“‹Safari6/8/2009 Firefox1/23/20183151
Edge: Before Edge 79, this method returns an HTMLCollection, not a NodeList.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Internet Explorer: Returns an HTMLCollection, not a NodeListSafari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.EXT_sRGB πŸ“‹Safari9/30/2015 Firefox1/23/2018846
Firefox: Not supported on Windows.
api.PerformanceResourceTiming.workerStart πŸ“‹Safari9/19/2017 Firefox1/23/2018126
html.global_attributes.title.multi-line_titles Safari9/19/2017 Firefox1/23/2018126
http.headers.Content-Security-Policy.frame-ancestors πŸ“‹Safari9/20/2016 Firefox1/23/2018490
Firefox: Before Firefox 58, frame-ancestors is ignored in Content-Security-Policy-Report-Only.Firefox for Android: Before Firefox for Android 58, frame-ancestors is ignored in Content-Security-Policy-Report-Only.

2017/11

API First Browser Date Last Browser Date Days Notes
api.Document.getSelection πŸ“‹Safari6/8/2009 Firefox11/14/20173081
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.HTMLInputElement.valueAsDate πŸ“‹Safari6/7/2010 Firefox11/14/20172717
api.Headers.iterate_combined_duplicates Safari3/27/2017 Firefox11/14/2017232
api.Headers.iterate_lexicographically Safari3/27/2017 Firefox11/14/2017232
api.KeyboardEvent.initKeyboardEvent πŸ“‹Safari2/2/2004 Firefox11/14/20175034
api.PerformanceObserver πŸ“‹Safari9/19/2017 Firefox11/14/201756
Node.js: Available as a part of the perf_hooks module.
api.PerformanceObserver.PerformanceObserver πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserver.disconnect πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserver.observe πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserver.worker_support Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserverEntryList πŸ“‹Safari9/19/2017 Firefox11/14/201756
Node.js: Available as a part of the perf_hooks module.Node.js: Only available as an internal instance, but can be accessed via the first parameter of the PerformanceObserver constructor.
api.PerformanceObserverEntryList.getEntries πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserverEntryList.getEntriesByName πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.PerformanceObserverEntryList.getEntriesByType πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.RTCPeerConnection.currentRemoteDescription πŸ“‹Safari9/19/2017 Firefox11/14/201756
api.Selection.type πŸ“‹Safari4/15/2005 Firefox11/14/20174596
javascript.statements.for_of.async_iterators Safari10/22/2013 Firefox11/14/20171484

2017/9

API First Browser Date Last Browser Date Days Notes
api.HTMLButtonElement.labels πŸ“‹Safari7/20/2011 Firefox9/28/20172262
api.HTMLInputElement.labels πŸ“‹Safari6/7/2010 Firefox9/28/20172670
api.HTMLLinkElement.as πŸ“‹Safari9/20/2016 Firefox9/28/2017373
api.HTMLMeterElement.labels πŸ“‹Safari7/25/2012 Firefox9/28/20171891
api.HTMLOutputElement.labels πŸ“‹Safari7/20/2011 Firefox9/28/20172262
api.HTMLProgressElement.labels πŸ“‹Safari7/25/2012 Firefox9/28/20171891
api.HTMLSelectElement.labels πŸ“‹Safari7/20/2011 Firefox9/28/20172262
api.HTMLTextAreaElement.labels πŸ“‹Safari7/20/2011 Firefox9/28/20172262
api.PerformanceTiming.secureConnectionStart πŸ“‹Safari10/16/2014 Firefox9/28/20171078
api.RTCStatsReport.type_candidate-pair.bytesReceived πŸ“‹Safari9/19/2017 Firefox9/28/20179
api.RTCStatsReport.type_candidate-pair.bytesSent πŸ“‹Safari9/19/2017 Firefox9/28/20179
api.RTCStatsReport.type_candidate-pair.nominated πŸ“‹Safari9/19/2017 Firefox9/28/20179
api.RTCStatsReport.type_candidate-pair.transportId πŸ“‹Safari9/19/2017 Firefox9/28/20179
html.elements.link.as πŸ“‹Safari9/20/2016 Firefox9/28/2017373
api.AudioContext.createMediaStreamDestination πŸ“‹Firefox10/29/2013 Safari9/19/20171421
api.AudioContext.createMediaStreamSource πŸ“‹Firefox10/29/2013 Safari9/19/20171421
api.BeforeUnloadEvent.user_interaction Firefox1/26/2016 Safari9/19/2017602
api.CSS.supports_static.optional_parens Firefox8/8/2017 Safari9/19/201742
api.CSSStyleDeclaration.@@iterator Firefox2/24/2015 Safari9/19/2017938
api.Crypto.subtle πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.DOMMatrix πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.DOMMatrix πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.a πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.b πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.c πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.d πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.e πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.f πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.invertSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m11 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m12 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m13 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m14 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m21 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m22 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m23 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m24 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m31 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m32 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m33 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m34 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m41 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m42 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m43 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.m44 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.multiplySelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.preMultiplySelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.rotateAxisAngleSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.rotateFromVectorSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.rotateSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.scale3dSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Starting in Firefox 69, the first parameter (scale) is now optional with a default value of 1, per the specification. Previously it was required.Firefox for Android: Starting in Firefox for Android 79, the first parameter (scale) is now optional with a default value of 1, per the specification. Previously it was required.
api.DOMMatrix.scaleSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Firefox 69 introduced support for the modern six-parameter syntax for scaleSelf(). Previously, it only supported the older three-parameter syntax: scale(scaleX[, originX][, originY]]]).Firefox for Android: Firefox for Android 79 introduced support for the modern six-parameter syntax for scaleSelf(). Previously, it only supported the older three-parameter syntax: scale(scaleX[, originX][, originY]]]).
api.DOMMatrix.setMatrixValue πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.skewXSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.skewYSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrix.translateSelf πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.a πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.b πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.c πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.d πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.e πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.f πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.flipX πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.flipY πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.inverse πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.is2D πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m11 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m12 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m13 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m14 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m21 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m22 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m23 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m24 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m31 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m32 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m33 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m34 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m41 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m42 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m43 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.m44 πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.multiply πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.rotate πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.rotateAxisAngle πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.rotateFromVector πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.scale πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Firefox 69 introduced support for the modern six-parameter syntax for scale(). Previously, it only supported the older three-parameter syntax: scale(scaleX[, originX][, originY]]]).Firefox for Android: Firefox for Android 79 introduced support for the modern six-parameter syntax for scale(). Previously, it only supported the older three-parameter syntax: scale(scaleX[, originX][, originY]]]).
api.DOMMatrixReadOnly.scale3d πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Starting in Firefox 69, the first parameter (scale) is now optional with a default value of 1, per the specification. Previously it was required.Firefox for Android: Starting in Firefox for Android 79, the first parameter (scale) is now optional with a default value of 1, per the specification. Previously it was required.
api.DOMMatrixReadOnly.skewX πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Before Firefox 69, the sx parameter was required; you may now call skewX() with no inputs. A value of 0 is correctly assumed.Firefox for Android: Before Firefox for Android 79, the sx parameter was required; you may now call skewX() with no inputs. A value of 0 is correctly assumed.
api.DOMMatrixReadOnly.skewY πŸ“‹Firefox10/14/2014 Safari9/19/20171071
Firefox: Before Firefox 69, the sy parameter was required; you may now call skewY() with no inputs. A value of 0 is correctly assumed.Firefox for Android: Before Firefox for Android 79, the sy parameter was required; you may now call skewY() with no inputs. A value of 0 is correctly assumed.
api.DOMMatrixReadOnly.toFloat32Array πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.toFloat64Array πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.toString Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.transformPoint πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMMatrixReadOnly.translate πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.DOMQuad πŸ“‹Firefox7/22/2014 Safari9/19/20171155
api.DOMQuad.DOMQuad πŸ“‹Firefox7/22/2014 Safari9/19/20171155
api.DOMQuad.p1 πŸ“‹Firefox7/22/2014 Safari9/19/20171155
Firefox: Before Firefox 69, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.Firefox for Android: Before Firefox for Android 79, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
api.DOMQuad.p2 πŸ“‹Firefox7/22/2014 Safari9/19/20171155
Firefox: Before Firefox 69, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.Firefox for Android: Before Firefox for Android 79, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
api.DOMQuad.p3 πŸ“‹Firefox7/22/2014 Safari9/19/20171155
Firefox: Before Firefox 69, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.Firefox for Android: Before Firefox for Android 79, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
api.DOMQuad.p4 πŸ“‹Firefox7/22/2014 Safari9/19/20171155
Firefox: Before Firefox 69, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.Firefox for Android: Before Firefox for Android 79, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
api.HTMLCanvasElement.captureStream πŸ“‹Firefox12/15/2015 Safari9/19/2017644
api.HTMLCanvasElement.toBlob πŸ“‹Firefox1/8/2013 Safari9/19/20171715
api.HTMLCanvasElement.toBlob.quality_parameter Firefox10/29/2013 Safari9/19/20171421
api.HTMLCanvasElement.toBlob.type_parameter_jpeg Firefox1/8/2013 Safari9/19/20171715
api.HTMLCanvasElement.toBlob.type_parameter_png Firefox1/8/2013 Safari9/19/20171715
api.HTMLCanvasElement.toDataURL.type_parameter_jpeg Firefox1/8/2013 Safari9/19/20171715
api.HTMLCanvasElement.toDataURL.type_parameter_png Firefox1/8/2013 Safari9/19/20171715
api.HTMLMediaElement.srcObject πŸ“‹Firefox11/3/2015 Safari9/19/2017686
Chrome: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Chrome: Support added for MediaStream objects (see bug 41186131).Chrome Android: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Chrome Android: Support added for MediaStream objects (see bug 41186131).Edge: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Edge: Support added for MediaStream objects (see bug 41186131).Firefox: Only supports MediaStream objects (see bug 886194).Firefox for Android: Only supports MediaStream objects (see bug 886194).Quest Browser: Support added for MediaStream objects (see bug 41186131).Opera: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Opera: Support added for MediaStream objects (see bug 41186131).Opera Android: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Opera Android: Support added for MediaStream objects (see bug 41186131).Samsung Internet: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).Samsung Internet: Support added for MediaStream objects (see bug 41186131).WebView Android: Support added for MediaSourceHandle objects transferred from dedicated workers where they were obtained from MediaSource.handle (see bug 40591101).WebView Android: Support added for MediaStream objects (see bug 41186131).
api.History.scrollRestoration πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.MediaDeviceInfo πŸ“‹Firefox7/2/2015 Safari9/19/2017810
api.MediaDeviceInfo.deviceId πŸ“‹Firefox7/2/2015 Safari9/19/2017810
api.MediaDeviceInfo.groupId πŸ“‹Firefox7/2/2015 Safari9/19/2017810
Firefox: Before Firefox 67, related devices are not actually grouped together by groupId.Firefox for Android: Before Firefox for Android 67, related devices are not actually grouped together by groupId.
api.MediaDeviceInfo.kind πŸ“‹Firefox7/2/2015 Safari9/19/2017810
api.MediaDeviceInfo.label πŸ“‹Firefox7/2/2015 Safari9/19/2017810
api.MediaDeviceInfo.toJSON πŸ“‹Firefox11/3/2015 Safari9/19/2017686
api.MediaDevices πŸ“‹Firefox10/14/2014 Safari9/19/20171071
api.MediaDevices.devicechange_event πŸ“‹Firefox3/7/2017 Safari9/19/2017196
api.MediaDevices.getSupportedConstraints πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.MediaDevices.getUserMedia πŸ“‹Firefox2/24/2015 Safari9/19/2017938
Chrome: If you need this capability before version 53, refer to navigator.webkitGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Chrome Android: If you need this capability before version 53, refer to navigator.webkitGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Firefox: If you need this capability before version 36, refer to navigator.mozGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Firefox: Before Firefox 55, getUserMedia() incorrectly returns NotSupportedError when the list of constraints specified is empty, or has all constraints set to false. Starting in Firefox 55, this situation now correctly calls the failure handler with a TypeError.Firefox: When using the Firefox-specific video constraint called mediaSource to request display capture, Firefox 66 and later consider values of screen and window to both cause a list of screens and windows to be shown.Firefox: Starting in Firefox 66, getUserMedia() can no longer be used in sandboxed <iframe>s or data URLs entered in the address bar by the user.Firefox for Android: If you need this capability before version 36, refer to navigator.mozGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Firefox for Android: Before Firefox for Android 55, getUserMedia() incorrectly returns NotSupportedError when the list of constraints specified is empty, or has all constraints set to false. Starting in Firefox for Android 55, this situation now correctly calls the failure handler with a TypeError.Firefox for Android: When using the Firefox for Android-specific video constraint called mediaSource to request display capture, Firefox for Android 66 and later consider values of screen and window to both cause a list of screens and windows to be shown.Firefox for Android: Starting in Firefox for Android 66, getUserMedia() can no longer be used in sandboxed <iframe>s or data URLs entered in the address bar by the user.Quest Browser: If you need this capability before version 5.0, refer to navigator.webkitGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Opera: If you need this capability before version 40, refer to navigator.webkitGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.Opera Android: If you need this capability before version 41, refer to navigator.webkitGetUserMedia, a prefixed form of the deprecated navigator.getUserMedia API.
api.MediaStream πŸ“‹Firefox8/28/2012 Safari9/19/20171848
api.MediaStream.MediaStream πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.MediaStream.active πŸ“‹Firefox3/7/2017 Safari9/19/2017196
api.MediaStream.addTrack πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.MediaStream.addtrack_event πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStream.clone πŸ“‹Firefox8/2/2016 Safari9/19/2017413
api.MediaStream.getAudioTracks πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Before Firefox 64, this method returned an array of AudioStreamTrack objects. However, MediaStreamTrack has now subsumed that interface's functionality.Firefox for Android: Before Firefox for Android 64, this method returned an array of AudioStreamTrack objects. However, MediaStreamTrack has now subsumed that interface's functionality.
api.MediaStream.getTrackById πŸ“‹Firefox9/20/2016 Safari9/19/2017364
api.MediaStream.getTracks πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.MediaStream.getVideoTracks πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Before Firefox 64, this method returned an array of VideoStreamTrack objects. However, MediaStreamTrack has now subsumed that interface's functionality.Firefox for Android: Before Firefox for Android 64, this method returned an array of VideoStreamTrack objects. However, MediaStreamTrack has now subsumed that interface's functionality.
api.MediaStream.id πŸ“‹Firefox9/22/2015 Safari9/19/2017728
api.MediaStream.removeTrack πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.MediaStreamAudioDestinationNode πŸ“‹Firefox10/29/2013 Safari9/19/20171421
api.MediaStreamAudioDestinationNode.stream πŸ“‹Firefox10/29/2013 Safari9/19/20171421
api.MediaStreamAudioSourceNode πŸ“‹Firefox10/29/2013 Safari9/19/20171421
api.MediaStreamTrack πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.MediaStreamTrack.applyConstraints πŸ“‹Firefox12/15/2015 Safari9/19/2017644
api.MediaStreamTrack.applyConstraints.deviceId_constraint πŸ“‹Firefox12/15/2015 Safari9/19/2017644
Firefox: Before Firefox 69, Firefox only supported deviceId in constraints passed into getUserMedia().Firefox for Android: Firefox for Android only supports deviceId when used in constraints passed into getUserMedia().
api.MediaStreamTrack.applyConstraints.echoCancellation_constraint πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.applyConstraints.facingMode_constraint πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.applyConstraints.frameRate_constraint πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.applyConstraints.height_constraint πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.applyConstraints.width_constraint πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.clone πŸ“‹Firefox8/2/2016 Safari9/19/2017413
api.MediaStreamTrack.enabled πŸ“‹Firefox9/17/2013 Safari9/19/20171463
api.MediaStreamTrack.ended_event πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.getConstraints πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.getSettings πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.id πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.MediaStreamTrack.kind πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.MediaStreamTrack.label πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.MediaStreamTrack.readyState πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrack.stop πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.MediaStreamTrackEvent πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrackEvent.MediaStreamTrackEvent πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.MediaStreamTrackEvent.track πŸ“‹Firefox11/15/2016 Safari9/19/2017308
api.Navigator.mediaDevices πŸ“‹Firefox2/24/2015 Safari9/19/2017938
api.Notification.body πŸ“‹Firefox12/10/2013 Safari9/19/20171379
api.Notification.lang πŸ“‹Firefox12/10/2013 Safari9/19/20171379
api.Notification.title πŸ“‹Firefox12/10/2013 Safari9/19/20171379
api.Performance.clearMarks πŸ“‹Firefox5/12/2015 Safari9/19/2017861
api.Performance.clearMeasures πŸ“‹Firefox5/12/2015 Safari9/19/2017861
api.Performance.clearResourceTimings πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.Performance.getEntries πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.Performance.getEntriesByName πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.Performance.getEntriesByType πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.Performance.mark πŸ“‹Firefox5/12/2015 Safari9/19/2017861
api.Performance.measure πŸ“‹Firefox5/12/2015 Safari9/19/2017861
api.Performance.resourcetimingbufferfull_event πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.Performance.setResourceTimingBufferSize πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceEntry πŸ“‹Firefox1/13/2015 Safari9/19/2017980
Node.js: Available as a part of the perf_hooks module.
api.PerformanceEntry.duration πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceEntry.entryType πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceEntry.name πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceEntry.startTime πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceEntry.toJSON πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceMark πŸ“‹Firefox5/12/2015 Safari9/19/2017861
Node.js: Available as a part of the perf_hooks module.
api.PerformanceMeasure πŸ“‹Firefox5/12/2015 Safari9/19/2017861
Node.js: Available as a part of the perf_hooks module.Node.js: Only available as an internal instance, but can be accessed via getting performance entries.
api.PerformanceResourceTiming πŸ“‹Firefox1/13/2015 Safari9/19/2017980
Node.js: Available as a part of the perf_hooks module.Node.js: Available as a part of the perf_hooks module.
api.PerformanceResourceTiming.connectEnd πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.connectStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.domainLookupEnd πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.domainLookupStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.fetchStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.initiatorType πŸ“‹Firefox1/13/2015 Safari9/19/2017980
Node.js: Since v18.2.0, the value can be returned by toJSON(), but can not accessed via property getter.
api.PerformanceResourceTiming.nextHopProtocol πŸ“‹Firefox3/8/2016 Safari9/19/2017560
api.PerformanceResourceTiming.redirectEnd πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.redirectStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.requestStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.responseEnd πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.responseStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.secureConnectionStart πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.PerformanceResourceTiming.toJSON πŸ“‹Firefox1/13/2015 Safari9/19/2017980
api.RTCDataChannel πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.binaryType πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.binaryType.arraybuffer_value Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.binaryType.blob_value Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.bufferedAmount πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.bufferedAmountLowThreshold πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.RTCDataChannel.bufferedamountlow_event πŸ“‹Firefox1/26/2016 Safari9/19/2017602
Chrome: The default for rtcpMuxPolicy is require.Chrome Android: The default for rtcpMuxPolicy is require.Edge: The default for rtcpMuxPolicy is require.Quest Browser: The default for rtcpMuxPolicy is require.Opera: The default for rtcpMuxPolicy is require.Opera Android: The default for rtcpMuxPolicy is require.Samsung Internet: The default for rtcpMuxPolicy is require.WebView Android: The default for rtcpMuxPolicy is require.
api.RTCDataChannel.close πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.close_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.error_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.id πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.label πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.message_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.open_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.ordered πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.protocol πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.readyState πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannel.send πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannelEvent πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannelEvent.RTCDataChannelEvent πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCDataChannelEvent.channel πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCIceCandidate πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.RTCIceCandidate.RTCIceCandidate πŸ“‹Firefox1/26/2016 Safari9/19/2017602
Firefox: Before Firefox 68, the constructor's candidateInfo parameter is required and the candidateInfo object must have a candidate property.Firefox: Before Firefox 68, the constructor's candidateInfo parameter is required and the candidateInfo object must have a candidate property.Firefox for Android: Before Firefox 68, the constructor's candidateInfo parameter is required and the candidateInfo object must have a candidate property.Firefox for Android: Before Firefox 68, the constructor's candidateInfo parameter is required and the candidateInfo object must have a candidate property.
api.RTCIceCandidate.candidate πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Before Firefox 126, the property was not read-only.Firefox for Android: Before Firefox 126, the property was not read-only.
api.RTCIceCandidate.sdpMLineIndex πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Before Firefox 126, the property was not read-only.Firefox for Android: Before Firefox 126, the property was not read-only.
api.RTCIceCandidate.sdpMid πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Before Firefox 126, the property was not read-only.Firefox for Android: Before Firefox 126, the property was not read-only.
api.RTCIceCandidate.toJSON πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCPeerConnection πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.RTCPeerConnection.RTCPeerConnection πŸ“‹Firefox1/26/2016 Safari9/19/2017602
Chrome: Before Chrome 63, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".Chrome Android: Before Chrome Android 63, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".Quest Browser: Before Quest Browser 5.0, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".Opera: Before Opera 50, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".Opera Android: Before Opera Android 46, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".Samsung Internet: Before Samsung Internet 8.0, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".WebView Android: Before WebView Android 63, the default value for the configuration.rtcpMuxPolicy parameter is "negotiate" instead of "required".
api.RTCPeerConnection.RTCPeerConnection.configuration_bundlePolicy_parameter πŸ“‹Firefox11/3/2015 Safari9/19/2017686
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.credential_parameter πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.urls_parameter πŸ“‹Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.username_parameter πŸ“‹Firefox8/6/2013 Safari9/19/20171505
api.RTCPeerConnection.RTCPeerConnection.configuration_iceTransportPolicy_parameter πŸ“‹Firefox11/3/2015 Safari9/19/2017686
api.RTCPeerConnection.addIceCandidate πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Starting in Firefox 68, the candidate parameter is optional when calling addIceCandidate(). A null value for candidate indicates no more candidates will be sent, while an empty candidate string indicates that no more candidates will be sent for the current generation of candidates.Firefox for Android: Starting in Firefox 68, the candidate parameter is optional when calling addIceCandidate(). A null value for candidate indicates no more candidates will be sent, while an empty candidate string indicates that no more candidates will be sent for the current generation of candidates.
api.RTCPeerConnection.addIceCandidate.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.addTrack πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.close πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.createAnswer πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.createAnswer.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.createDataChannel πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.createOffer πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.createOffer.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.currentLocalDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.datachannel_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.getConfiguration πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.getReceivers πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCPeerConnection.getSenders πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCPeerConnection.getStats πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCPeerConnection.getStats.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.getStats.selector_parameter Firefox2/4/2014 Safari9/19/20171323
api.RTCPeerConnection.iceConnectionState πŸ“‹Firefox9/17/2013 Safari9/19/20171463
api.RTCPeerConnection.iceGatheringState πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.icecandidate_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.iceconnectionstatechange_event πŸ“‹Firefox9/17/2013 Safari9/19/20171463
api.RTCPeerConnection.icegatheringstatechange_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.localDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.negotiationneeded_event πŸ“‹Firefox5/12/2015 Safari9/19/2017861
Firefox: Although the onnegotiationneeded property is supported, the negotiationneeded event is never fired.Firefox for Android: Although the onnegotiationneeded property is supported, the negotiationneeded event is never fired.
api.RTCPeerConnection.pendingLocalDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.pendingRemoteDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.remoteDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.removeTrack πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.setLocalDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
Firefox: Firefox does not support descriptions of type pranswer.Firefox for Android: Firefox does not support descriptions of type pranswer.
api.RTCPeerConnection.setLocalDescription.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.setRemoteDescription πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCPeerConnection.setRemoteDescription.returns_promise Firefox3/31/2015 Safari9/19/2017903
api.RTCPeerConnection.signalingState πŸ“‹Firefox9/17/2013 Safari9/19/20171463
api.RTCPeerConnection.signalingstatechange_event πŸ“‹Firefox2/24/2015 Safari9/19/2017938
Firefox: Although the onsignalingstatechange property is supported, the signalingstatechange event is not fired as an Event object. See bug 1075133.Firefox for Android: Although the onsignalingstatechange property is supported, the signalingstatechange event is not fired as an Event object. See bug 1075133.
api.RTCPeerConnection.track_event πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCRtpReceiver πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCRtpReceiver.track πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCRtpSender πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCRtpSender.getParameters πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.RTCRtpSender.getParameters.return_object_property_headerExtensions πŸ“‹Firefox4/26/2016 Safari9/19/2017511
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpSender.replaceTrack πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCRtpSender.setParameters.parameters_encodings_parameter πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.RTCRtpSender.setParameters.parameters_encodings_parameter.maxBitrate πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.RTCRtpSender.setParameters.parameters_encodings_parameter.priority πŸ“‹Firefox4/26/2016 Safari9/19/2017511
Firefox: In version 110 and later the default priority is low.Firefox for Android: In version 110 and later the default priority is low.
api.RTCRtpSender.setParameters.parameters_encodings_parameter.scaleResolutionDownBy πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.RTCRtpSender.track πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCSessionDescription πŸ“‹Firefox1/26/2016 Safari9/19/2017602
api.RTCSessionDescription.RTCSessionDescription Firefox1/26/2016 Safari9/19/2017602
api.RTCSessionDescription.sdp πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCSessionDescription.toJSON πŸ“‹Firefox9/17/2013 Safari9/19/20171463
api.RTCSessionDescription.type πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCStatsReport πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.@@iterator Firefox8/2/2016 Safari9/19/2017413
api.RTCStatsReport.entries πŸ“‹Firefox8/2/2016 Safari9/19/2017413
api.RTCStatsReport.forEach πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.get πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.has πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.keys πŸ“‹Firefox8/2/2016 Safari9/19/2017413
api.RTCStatsReport.size πŸ“‹Firefox8/2/2016 Safari9/19/2017413
api.RTCStatsReport.type_candidate-pair πŸ“‹Firefox4/29/2014 Safari9/19/20171239
api.RTCStatsReport.type_candidate-pair.localCandidateId πŸ“‹Firefox4/29/2014 Safari9/19/20171239
api.RTCStatsReport.type_candidate-pair.remoteCandidateId πŸ“‹Firefox4/29/2014 Safari9/19/20171239
api.RTCStatsReport.type_candidate-pair.state πŸ“‹Firefox4/29/2014 Safari9/19/20171239
api.RTCStatsReport.type_inbound-rtp πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_inbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_outbound-rtp πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_outbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_remote-inbound-rtp πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_remote-inbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_remote-outbound-rtp πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.type_remote-outbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Safari9/19/20171323
api.RTCStatsReport.values Firefox8/2/2016 Safari9/19/2017413
api.RTCTrackEvent πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCTrackEvent.RTCTrackEvent πŸ“‹Firefox4/26/2016 Safari9/19/2017511
api.RTCTrackEvent.receiver πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.RTCTrackEvent.streams πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.RTCTrackEvent.track πŸ“‹Firefox6/25/2013 Safari9/19/20171547
api.SubtleCrypto πŸ“‹Firefox12/1/2014 Safari9/19/20171023
Node.js: Available as a part of the crypto module.
api.SubtleCrypto.deriveBits πŸ“‹Firefox12/1/2014 Safari9/19/20171023
Deno: Not supported: ECDH.Edge: Not supported: ECDH.Edge: Not supported: HKDF, PBKDF2.Node.js: Supports: NODE-DHNode.js: Supports: NODE-SCRYPT
api.SubtleCrypto.deriveKey πŸ“‹Firefox12/1/2014 Safari9/19/20171023
Edge: Not supported: ECDH.Edge: Not supported: HKDF, PBKDF2.Node.js: Supports: NODE-DHNode.js: Supports: NODE-SCRYPT
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_aes πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_hmac πŸ“‹Firefox12/1/2014 Safari9/19/20171023
api.SubtleCrypto.worker_support Firefox8/2/2016 Safari9/19/2017413
api.URL.toJSON πŸ“‹Firefox6/13/2017 Safari9/19/201798
api.URLSearchParams.URLSearchParams.record Firefox6/13/2017 Safari9/19/201798
api.URLSearchParams.URLSearchParams.sequence Firefox4/19/2017 Safari9/19/2017153
api.URLSearchParams.sort πŸ“‹Firefox6/13/2017 Safari9/19/201798
api.Window.beforeunload_event.preventdefault_activation Firefox8/16/2011 Safari9/19/20172226
api.origin πŸ“‹Firefox6/13/2017 Safari9/19/201798
api.performance.worker_support Firefox12/1/2014 Safari9/19/20171023
Node.js: Available as a part of the perf_hooks module.
css.properties.align-content.flex_context.first_baseline Firefox3/7/2017 Safari9/19/2017196
css.properties.align-content.flex_context.last_baseline Firefox3/7/2017 Safari9/19/2017196
Safari: This value is recognized, but has no effect. See bug 235005.Safari on iOS: This value is recognized, but has no effect. See bug 235005.WebView on iOS: This value is recognized, but has no effect. See bug 235005.
css.properties.align-content.flex_context.space-evenly Firefox3/7/2017 Safari9/19/2017196
css.properties.align-items.flex_context.first_baseline Firefox3/7/2017 Safari9/19/2017196
css.properties.align-items.grid_context.start_end Firefox3/7/2017 Safari9/19/2017196
css.properties.align-self.flex_context.first_baseline Firefox3/7/2017 Safari9/19/2017196
css.properties.cursor.grab Firefox2/4/2014 Safari9/19/20171323
Chrome: Chrome also continues to support the prefixed versions.Chrome: Chrome 22 added Windows support.Chrome Android: Chrome Android also continues to support the prefixed versions.Chrome Android: Chrome Android 25 added Windows support.Quest Browser: Quest Browser also continues to support the prefixed versions.Quest Browser: Quest Browser 5.0 added Windows support.Opera: Opera also continues to support the prefixed versions.Opera: Opera 22 added Windows support.Opera Android: Opera also continues to support the prefixed versions.Opera Android: Opera 22 added Windows support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView Android: WebView Android also continues to support the prefixed versions.WebView Android: WebView Android 4.4 added Windows support.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.grabbing πŸ“‹Firefox2/4/2014 Safari9/19/20171323
Chrome: Chrome 22 added Windows support.Chrome Android: Chrome Android 25 added Windows support.Edge: Edge 79 added Windows support.Quest Browser: Quest Browser 5.0 added Windows support.Opera: Opera 15 added Windows support.Opera Android: Opera Android 14 added Windows support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.Samsung Internet: Samsung Internet 1.5 added Windows support.WebView Android: WebView Android 4.4 added Windows support.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.font.font-width_keyword_values Firefox12/15/2015 Safari9/19/2017644
css.properties.font-stretch πŸ“‹Firefox12/20/2011 Safari9/19/20172100
Chrome: A font-stretch declaration must be added to the @font-face before this property will function.Chrome Android: A font-stretch declaration must be added to the @font-face before this property will function.Quest Browser: A font-stretch declaration must be added to the @font-face before this property will function.Opera: A font-stretch declaration must be added to the @font-face before this property will function.Opera Android: A font-stretch declaration must be added to the @font-face before this property will function.Samsung Internet: A font-stretch declaration must be added to the @font-face before this property will function.WebView Android: A font-stretch declaration must be added to the @font-face before this property will function.
css.properties.font-stretch.condensed πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.expanded πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.extra-condensed πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.extra-expanded πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.normal πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.semi-condensed πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.semi-expanded πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.ultra-condensed πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.font-stretch.ultra-expanded πŸ“‹Firefox12/20/2011 Safari9/19/20172100
css.properties.gap.grid_context.percentage_values Firefox3/7/2017 Safari9/19/2017196
css.properties.grid-auto-columns.max-content πŸ“‹Firefox3/7/2017 Safari9/19/2017196
css.properties.grid-auto-columns.min-content πŸ“‹Firefox3/7/2017 Safari9/19/2017196
css.properties.grid-auto-rows.max-content πŸ“‹Firefox3/7/2017 Safari9/19/2017196
css.properties.grid-auto-rows.min-content πŸ“‹Firefox3/7/2017 Safari9/19/2017196
css.properties.justify-content.flex_context.space-evenly Firefox3/7/2017 Safari9/19/2017196
css.properties.place-content.grid_context Firefox4/19/2017 Safari9/19/2017153
Firefox: Starting with version 60, you can only specify a single value if it is valid for both align-content and justify-content.Firefox for Android: Starting with version 60, you can only specify a single value if it is valid for both align-content and justify-content.
css.properties.place-items πŸ“‹Firefox3/8/2016 Safari9/19/2017560
css.properties.place-items.flex_context Firefox3/8/2016 Safari9/19/2017560
css.properties.place-items.grid_context Firefox3/8/2016 Safari9/19/2017560
css.properties.place-self πŸ“‹Firefox3/8/2016 Safari9/19/2017560
css.properties.place-self.flex_context Firefox3/8/2016 Safari9/19/2017560
css.properties.place-self.grid_context Firefox3/8/2016 Safari9/19/2017560
css.properties.position.absolutely_positioned_flex_children Firefox3/7/2017 Safari9/19/2017196
css.properties.scroll-snap-type.none πŸ“‹Firefox7/2/2015 Safari9/19/2017810
css.properties.transform-box πŸ“‹Firefox8/8/2017 Safari9/19/201742
css.properties.transform-box.border-box πŸ“‹Firefox8/8/2017 Safari9/19/201742
css.properties.transform-box.fill-box πŸ“‹Firefox8/8/2017 Safari9/19/201742
css.properties.transform-box.view-box πŸ“‹Firefox8/8/2017 Safari9/19/201742
css.properties.unicode-bidi.isolate πŸ“‹Firefox11/15/2016 Safari9/19/2017308
Chrome: Before Chrome 47, -webkit-isolate could lock up the browser.Chrome: Since Chrome 19, the syntax from a previous version of the specification, where the isolate keyword could be used together with bidi-override, is allowed.Firefox: From Firefox 10 to Firefox 16 (inclusive), the isolate keyword could be used together with bidi-override, which was the syntax from a previous version of the specification. From Firefox 17, only one value is allowed. Use isolate-override instead the previous isolate bidi-override.Firefox for Android: From Firefox for Android 10 to Firefox for Android 16 (inclusive), the isolate keyword could be used together with bidi-override, which was the syntax from a previous version of the specification. From Firefox for Android 17, only one value is allowed. Use isolate-override instead the previous isolate bidi-override.Opera: Before Opera 34, -webkit-isolate could lock up the browser.Opera: Since Opera 15, the syntax from a previous version of the specification, where the isolate keyword could be used together with bidi-override, is allowed.Safari: Before Safari 9, -webkit-isolate could lock up the browser.Safari on iOS: Before Safari on iOS 9, -webkit-isolate could lock up the browser.WebView on iOS: Before WebView on iOS 9, -webkit-isolate could lock up the browser.
css.properties.unicode-bidi.isolate-override πŸ“‹Firefox11/15/2016 Safari9/19/2017308
css.properties.unicode-bidi.plaintext πŸ“‹Firefox11/15/2016 Safari9/19/2017308
Firefox: Before Firefox 50, the plaintext value was ignored for vertical writing modes (bug 1302734).Firefox: Before Firefox 15, plaintext didn't do anything to an inline element. The specification changed and the implementation was changed in Firefox 15.Firefox for Android: Before Firefox for Android 50, the plaintext value was ignored for vertical writing modes (bug 1302734).Firefox for Android: Before Firefox for Android 15, plaintext didn't do anything to an inline element. The specification changed and the implementation was changed in Firefox for Android 15.
css.types.calc.nested Firefox8/2/2016 Safari9/19/2017413
html.elements.img.usemap.case_sensitive Firefox1/24/2017 Safari9/19/2017238
http.headers.Accept-Encoding.br πŸ“‹Firefox1/26/2016 Safari9/19/2017602
Safari: Unsupported before macOS 10.13 High Sierra.
http.headers.Cache-Control.immutable Firefox9/20/2016 Safari9/19/2017364
http.headers.Content-Encoding.br πŸ“‹Firefox1/26/2016 Safari9/19/2017602
Safari: Unsupported before macOS 10.13 High Sierra.
http.headers.Content-Security-Policy.manifest-src πŸ“‹Firefox9/22/2015 Safari9/19/2017728
http.headers.Timing-Allow-Origin πŸ“‹Firefox3/8/2016 Safari9/19/2017560
http.headers.X-Content-Type-Options πŸ“‹Firefox11/15/2016 Safari9/19/2017308
Chrome: Not supported for stylesheets.Chrome Android: Not supported for stylesheets.Opera: Not supported for stylesheets.Opera Android: Not supported for stylesheets.Samsung Internet: Not supported for stylesheets.WebView Android: Not supported for stylesheets.
javascript.builtins.Intl.Collator.Collator.options_caseFirst_parameter Firefox8/8/2017 Safari9/19/201742
javascript.builtins.Intl.DateTimeFormat.formatToParts πŸ“‹Firefox1/24/2017 Safari9/19/2017238
Chrome: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Chrome Android: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Node.js: Before version 12.0.0, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 12.0.0 and later use the specification defined dayPeriod. See bug 41402623.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.Quest Browser: Before version 6.0, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.Opera: Before version 58, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 58 and later use the specification defined dayPeriod. See bug 41402623.Opera Android: Before version 50, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 50 and later use the specification defined dayPeriod. See bug 41402623.Samsung Internet: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.WebView Android: Before version 71, formatToParts() returned an object with an incorrectly cased type key of dayperiod. Version 71 and later use the specification defined dayPeriod. See bug 41402623.
javascript.grammar.template_literals.template_literal_revision Firefox4/19/2017 Safari9/19/2017153
javascript.operators.new_target πŸ“‹Firefox9/22/2015 Safari9/19/2017728
webassembly.api πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.CompileError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.CompileError.CompileError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Instance πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Instance.Instance πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Instance.exports πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.LinkError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.LinkError.LinkError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Memory πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Memory.Memory πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Memory.buffer πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Memory.grow πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Module πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Module.Module πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Module.customSections_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Module.exports_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Module.imports_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.RuntimeError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.RuntimeError.RuntimeError πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table.Table πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table.get πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table.grow πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table.length πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.Table.set πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.compile_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.instantiate_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196
webassembly.api.validate_static πŸ“‹Firefox3/7/2017 Safari9/19/2017196

2017/8

API First Browser Date Last Browser Date Days Notes
api.CSSStyleSheet.insertRule.index_parameter_optional Safari6/23/2003 Firefox8/8/20175160
api.DOMTokenList.remove_duplicates Safari9/20/2016 Firefox8/8/2017322
api.Geolocation.secure_context_required Safari9/20/2016 Firefox8/8/2017322
WebView Android: Secure context is only required for applications targeting Android Nougat (7) and higher. See bug 40465140.
api.GeolocationCoordinates.secure_context_required Safari9/20/2016 Firefox8/8/2017322
api.GeolocationPosition.secure_context_required Safari9/20/2016 Firefox8/8/2017322
api.GeolocationPositionError.secure_context_required Safari9/20/2016 Firefox8/8/2017322
api.Navigator.geolocation.secure_context_required Safari9/20/2016 Firefox8/8/2017322
api.SVGRadialGradientElement.fr πŸ“‹Safari10/22/2013 Firefox8/8/20171386
api.Selection.collapse.node_parameter_nullable Safari4/15/2005 Firefox8/8/20174498
api.Selection.collapse.offset_parameter_optional Safari4/15/2005 Firefox8/8/20174498
api.Selection.containsNode.partialContainment_parameter_optional Safari3/18/2008 Firefox8/8/20173430
api.Selection.empty πŸ“‹Safari4/15/2005 Firefox8/8/20174498
api.Selection.extend.offset_parameter_optional Safari3/18/2008 Firefox8/8/20173430
api.Selection.setPosition πŸ“‹Safari4/15/2005 Firefox8/8/20174498
css.selectors.cue πŸ“‹Safari10/22/2013 Firefox8/8/20171386
Firefox: From Firefox 69, only allowed properties apply to the ::cue pseudo-element with no argument. See Permitted properties for a list of the allowed properties.
css.types.gradient.linear-gradient.unitless_0_angle Safari10/22/2013 Firefox8/8/20171386
Firefox: Accepted only in -webkit-linear-gradient() and -moz-linear-gradient(), not linear-gradient().Firefox for Android: Accepted only in -webkit-linear-gradient() and -moz-linear-gradient(), not linear-gradient().
css.types.gradient.repeating-linear-gradient.unitless_0_angle Safari10/22/2013 Firefox8/8/20171386
Firefox: Accepted only in -webkit-repeating-linear-gradient() and -moz-repeating-linear-gradient(), not repeating-linear-gradient().Firefox for Android: Accepted only in -webkit-repeating-linear-gradient() and -moz-repeating-linear-gradient(), not repeating-linear-gradient().
http.headers.SourceMap πŸ“‹Safari10/22/2013 Firefox8/8/20171386
Chrome: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Chrome Android: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Edge: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Quest Browser: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Opera: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Opera Android: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.Samsung Internet: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.WebView Android: Not supported for ECMAScript Modules (<script type="module">). See bug 40854862.
javascript.builtins.Float32Array.Float32Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Float64Array.Float64Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Int16Array.Int16Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Int32Array.Int32Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Int8Array.Int8Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.String.toLocaleLowerCase.locales_parameter Safari9/20/2016 Firefox8/8/2017322
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.String.toLocaleUpperCase.locales_parameter Safari9/20/2016 Firefox8/8/2017322
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.TypedArray.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Uint16Array.Uint16Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Uint32Array.Uint32Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Uint8Array.Uint8Array.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.constructor_without_parameters Safari7/20/2011 Firefox8/8/20172211

2017/6

API First Browser Date Last Browser Date Days Notes
api.ProgressEvent.worker_support Safari9/20/2016 Firefox6/13/2017266
Chrome: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Chrome Android: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Edge: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Quest Browser: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Opera: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Opera Android: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.Samsung Internet: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.WebView Android: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
api.Request.Request.cross_origin_stripped Safari3/27/2017 Firefox6/13/201778
api.URL.toString πŸ“‹Safari10/22/2013 Firefox6/13/20171330
css.properties.appearance.none πŸ“‹Safari10/26/2007 Firefox6/13/20173518
Firefox: Doesn't work with <input type="checkbox"> and <input type="radio">.Firefox for Android: Doesn't work with <input type="checkbox"> and <input type="radio">.
css.properties.clip-path.basic_shape πŸ“‹Safari10/22/2013 Firefox6/13/20171330
css.types.basic-shape πŸ“‹Safari3/27/2017 Firefox6/13/201778
css.types.basic-shape.animation Safari3/27/2017 Firefox6/13/201778
css.types.basic-shape.circle πŸ“‹Safari3/27/2017 Firefox6/13/201778
css.types.basic-shape.ellipse πŸ“‹Safari3/27/2017 Firefox6/13/201778
css.types.basic-shape.inset πŸ“‹Safari3/27/2017 Firefox6/13/201778
css.types.basic-shape.polygon πŸ“‹Safari3/27/2017 Firefox6/13/201778

2017/4

API First Browser Date Last Browser Date Days Notes
api.AudioParam.maxValue πŸ“‹Safari7/25/2012 Firefox4/19/20171729
api.AudioParam.minValue πŸ“‹Safari7/25/2012 Firefox4/19/20171729
api.CSSNamespaceRule πŸ“‹Safari3/27/2017 Firefox4/19/201723
api.CompositionEvent.CompositionEvent πŸ“‹Safari10/22/2013 Firefox4/19/20171275
api.Event.cancelBubble πŸ“‹Safari6/23/2003 Firefox4/19/20175049
Chrome: Starting with Chrome 58 and Opera 45, setting this property to false does nothing, as per spec discussion.Chrome Android: Starting with Chrome Android 58 and Opera 45, setting this property to false does nothing, as per spec discussion.Firefox: Only supported for UIEvent, not all Event objects.Firefox for Android: Only supported for UIEvent, not all Event objects.Node.js: This is not used in Node.js and is provided purely for completeness.Quest Browser: Starting with Quest Browser 5.0 and Opera 45, setting this property to false does nothing, as per spec discussion.Opera: Starting with Chrome 58 and Opera 45, setting this property to false does nothing, as per spec discussion.Opera Android: Starting with Chrome 58 and Opera 45, setting this property to false does nothing, as per spec discussion.Samsung Internet: Starting with Samsung Internet 7.0 and Opera 45, setting this property to false does nothing, as per spec discussion.WebView Android: Starting with WebView Android 58 and Opera 45, setting this property to false does nothing, as per spec discussion.
api.HTMLMediaElement.play.returns_promise Safari9/20/2016 Firefox4/19/2017211
api.MouseEvent.x πŸ“‹Safari3/18/2008 Firefox4/19/20173319
api.MouseEvent.y πŸ“‹Safari3/18/2008 Firefox4/19/20173319
api.Node.getRootNode πŸ“‹Safari3/27/2017 Firefox4/19/201723
api.Selection.setBaseAndExtent πŸ“‹Safari4/15/2005 Firefox4/19/20174387
api.WEBGL_debug_renderer_info πŸ“‹Safari3/21/2016 Firefox4/19/2017394
Firefox: Deprecated, and may be removed in a future release (see bug 1722782).Firefox for Android: Deprecated, and may be removed in a future release (see bug 1722782).
css.properties.mask-image.multiple_mask_images Safari6/8/2009 Firefox4/19/20172872
css.properties.mask-image.svg_masks Safari6/8/2009 Firefox4/19/20172872
javascript.builtins.Function.name.inferred_names Safari9/20/2016 Firefox4/19/2017211
Edge: Names for functions defined in a dictionary are properly assigned; however, anonymous functions defined on a var/let variable assignment have blank names.
javascript.builtins.Intl.DateTimeFormat.resolvedOptions.computed_timezone Safari9/20/2016 Firefox4/19/2017211
javascript.statements.for_of.closing_iterators Safari10/22/2013 Firefox4/19/20171275

2017/3

API First Browser Date Last Browser Date Days Notes
api.CSS.escape_static πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.CanvasRenderingContext2D.resetTransform πŸ“‹Firefox2/24/2015 Safari3/27/2017762
api.ClipboardEvent πŸ“‹Firefox6/25/2013 Safari3/27/20171371
Firefox: When pasting multiple files, only returns the first file. See bug 1954680.Firefox: Before Firefox 140, when pasting multiple files, and the first file was not acceptable, returned no file. See bug 1961170.Firefox for Android: When pasting multiple files, only returns the first file. See bug 1954680.Firefox for Android: Before Firefox for Android 140, when pasting multiple files, and the first file was not acceptable, returned no file. See bug 1961170.
api.ClipboardEvent.ClipboardEvent πŸ“‹Firefox6/25/2013 Safari3/27/20171371
api.ClipboardEvent.clipboardData πŸ“‹Firefox6/25/2013 Safari3/27/20171371
api.DOMException.DOMException πŸ“‹Firefox3/31/2015 Safari3/27/2017727
api.DOMPoint πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPoint.DOMPoint πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPoint.w πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPoint.x πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPoint.y πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPoint.z πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPointReadOnly πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPointReadOnly.w πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPointReadOnly.x πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPointReadOnly.y πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMPointReadOnly.z πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRect πŸ“‹Firefox2/4/2014 Safari3/27/20171147
api.DOMRect.DOMRect πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRect.x πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRect.y πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRectList πŸ“‹Firefox2/4/2014 Safari3/27/20171147
api.DOMRectReadOnly πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRectReadOnly.x πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMRectReadOnly.y πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.DOMTokenList.@@iterator Firefox2/24/2015 Safari3/27/2017762
api.DOMTokenList.entries Firefox11/15/2016 Safari3/27/2017132
api.DOMTokenList.forEach Firefox11/15/2016 Safari3/27/2017132
api.DOMTokenList.keys Firefox11/15/2016 Safari3/27/2017132
api.DOMTokenList.replace πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.DOMTokenList.supports πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.DOMTokenList.values Firefox11/15/2016 Safari3/27/2017132
api.Document.dir πŸ“‹Firefox11/9/2004 Safari3/27/20174521
Chrome: Only supported for HTMLDocument, not all Document objects.Chrome Android: Only supported for HTMLDocument, not all Document objects.Firefox: Incorrect behavior before Firefox 23.Firefox for Android: Incorrect behavior before Firefox for Android 23.Opera: Only supported for HTMLDocument, not all Document objects.Opera Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.Samsung Internet: Only supported for HTMLDocument, not all Document objects.WebView Android: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.exitPointerLock πŸ“‹Firefox11/15/2016 Safari3/27/2017132
api.Document.pointerLockElement πŸ“‹Firefox11/15/2016 Safari3/27/2017132
api.Document.pointerlockchange_event πŸ“‹Firefox11/15/2016 Safari3/27/2017132
api.Document.pointerlockerror_event πŸ“‹Firefox11/15/2016 Safari3/27/2017132
api.Document.rootElement πŸ“‹Firefox3/7/2017 Safari3/27/201720
api.Element.getAttributeNames πŸ“‹Firefox3/8/2016 Safari3/27/2017384
api.Element.requestPointerLock πŸ“‹Firefox11/15/2016 Safari3/27/2017132
Chrome: From version 92, returns a promise instead of undefined. The behavior reflects a specification change.Edge: From version 92, returns a promise instead of undefined. The behavior reflects a specification change.Opera: From version 78, returns a promise instead of undefined. The behavior reflects a specification change.Safari: From version 18.4, returns a promise instead of undefined. The behavior reflects a specification change.Samsung Internet: From version 16, returns a promise instead of undefined. The behavior reflects a specification change.
api.Element.scroll πŸ“‹Firefox2/24/2015 Safari3/27/2017762
api.Element.scroll.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Element.scroll.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollBy πŸ“‹Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollBy.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollBy.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollTo πŸ“‹Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollTo.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Element.scrollTo.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.File.File πŸ“‹Firefox3/18/2014 Safari3/27/20171105
api.Gamepad πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.axes πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.buttons πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.connected πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.id πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.index πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.mapping πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Gamepad.timestamp πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadButton πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadButton.pressed πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadButton.value πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadEvent πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadEvent.GamepadEvent πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.GamepadEvent.gamepad πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.HTMLAnchorElement.download πŸ“‹Firefox4/2/2013 Safari3/27/20171455
api.HTMLAreaElement.download πŸ“‹Firefox4/2/2013 Safari3/27/20171455
api.HTMLAreaElement.toString πŸ“‹Firefox6/25/2013 Safari3/27/20171371
api.HTMLButtonElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLCanvasElement.getContext.webgl_context.options_alpha_parameter πŸ“‹Firefox6/10/2014 Safari3/27/20171021
api.HTMLCanvasElement.getContext.webgl_context.options_failIfMajorPerformanceCaveat_parameter πŸ“‹Firefox9/22/2015 Safari3/27/2017552
api.HTMLElement.toggle_event πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLElement.toggle_event.details_elements πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLFieldSetElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLFormElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLHRElement.color πŸ“‹Firefox11/9/2004 Safari3/27/20174521
api.HTMLIFrameElement.allowFullscreen πŸ“‹Firefox6/25/2013 Safari3/27/20171371
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.
api.HTMLInputElement.minLength πŸ“‹Firefox1/24/2017 Safari3/27/201762
api.HTMLInputElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLObjectElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLOutputElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLSelectElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.HTMLSourceElement.sizes πŸ“‹Firefox5/12/2015 Safari3/27/2017685
Safari: The sizes attribute is supported since Safari 9.1.Safari on iOS: The sizes attribute is supported since Safari on iOS 9.1.WebView on iOS: The sizes attribute is supported since WebView on iOS 9.1.
api.HTMLSourceElement.srcset πŸ“‹Firefox5/12/2015 Safari3/27/2017685
Safari: The srcset attribute is supported since Safari 9.1.Safari on iOS: The srcset attribute is supported since Safari on iOS 9.1.WebView on iOS: The srcset attribute is supported since WebView on iOS 9.1.
api.HTMLTextAreaElement.minLength πŸ“‹Firefox1/24/2017 Safari3/27/201762
api.HTMLTextAreaElement.reportValidity πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.Headers πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.@@iterator Firefox1/26/2016 Safari3/27/2017426
api.Headers.Headers πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.append πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.delete πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.entries Firefox1/26/2016 Safari3/27/2017426
api.Headers.forEach Firefox6/7/2016 Safari3/27/2017293
api.Headers.get πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Chrome: Before version 57, get() returns only the first value for the specified header.Chrome Android: Before version 57, get() returns only the first value for the specified header.Firefox: Before version 52, get() returns only the first value for the specified header.Firefox for Android: Before version 52, get() returns only the first value for the specified header.Quest Browser: Before version 5.0, get() returns only the first value for the specified header.Opera: Before version 44, get() returns only the first value for the specified header.Opera Android: Before version 43, get() returns only the first value for the specified header.Samsung Internet: Before version 7.0, get() returns only the first value for the specified header.WebView Android: Before version 57, get() returns only the first value for the specified header.
api.Headers.has πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.keys Firefox1/26/2016 Safari3/27/2017426
api.Headers.set πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Headers.values Firefox1/26/2016 Safari3/27/2017426
api.IDBCursor.continuePrimaryKey πŸ“‹Firefox1/31/2012 Safari3/27/20171882
api.IDBCursor.key.binary_keys Firefox1/24/2017 Safari3/27/201762
api.IDBDatabase.close_event πŸ“‹Firefox11/15/2016 Safari3/27/2017132
api.IDBIndex.getAll πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.IDBIndex.getAllKeys πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.IDBIndex.name.renaming_through_name_setter Firefox9/20/2016 Safari3/27/2017188
api.IDBKeyRange.includes πŸ“‹Firefox6/7/2016 Safari3/27/2017293
api.IDBObjectStore.getAll πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.IDBObjectStore.getAllKeys πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.IDBObjectStore.getKey πŸ“‹Firefox1/24/2017 Safari3/27/201762
api.IDBObjectStore.name.renaming_through_name_setter Firefox9/20/2016 Safari3/27/2017188
api.IDBObjectStore.openKeyCursor πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.IDBTransaction.objectStoreNames πŸ“‹Firefox1/31/2012 Safari3/27/20171882
api.InputEvent πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.InputEvent.InputEvent πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.KeyboardEvent.code πŸ“‹Firefox5/12/2015 Safari3/27/2017685
Chrome Android: The value is always empty.Firefox for Android: The value is always empty.Quest Browser: The value is always empty.Opera Android: The value is always empty.Samsung Internet: The value is always empty.WebView Android: The value is always empty.
api.KeyboardEvent.getModifierState πŸ“‹Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_alt Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_altgraph Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_capslock Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_control Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_meta Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.getModifierState.key_parameter_shift Firefox8/28/2012 Safari3/27/20171672
api.KeyboardEvent.isComposing πŸ“‹Firefox7/22/2014 Safari3/27/2017979
api.KeyboardEvent.key πŸ“‹Firefox8/6/2013 Safari3/27/20171329
Chrome: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.Chrome Android: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.Internet Explorer: IE's implementation does not completely match the current spec because it is based on an older version of the spec.Quest Browser: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.Opera: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.Opera Android: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.Samsung Internet: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.WebView Android: When selecting an autocomplete suggestion, a keydown event fires where the event's key property is undefined. See bug 41425904.
api.KeyboardEvent.key.dead_key Firefox3/31/2015 Safari3/27/2017727
api.KeyboardEvent.key.non_printable_keys Firefox8/6/2013 Safari3/27/20171329
Internet Explorer: IE's implementation does not completely match the current spec because it is based on an older version of the spec.
api.KeyboardEvent.key.printable_key Firefox4/29/2014 Safari3/27/20171063
Internet Explorer: IE's implementation does not completely match the current spec because it is based on an older version of the spec.
api.KeyboardEvent.repeat πŸ“‹Firefox3/18/2014 Safari3/27/20171105
Chrome: Before Chrome 139, on Linux under X11, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Chrome: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Chrome Android: Before Chrome Android 139, on Linux under X11, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Chrome Android: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Quest Browser: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Opera: Before Opera 123, on Linux under X11, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Opera: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Opera Android: Before Opera Android 91, on Linux under X11, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Opera Android: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.Samsung Internet: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.WebView Android: Before WebView Android 139, on Linux under X11, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.WebView Android: On Windows and Linux, if multiple keys are held down, a keydown event for the most recently pressed key will trigger with repeat incorrectly set to false. See bug 40940886.
api.MediaSource.clearLiveSeekableRange πŸ“‹Firefox11/15/2016 Safari3/27/2017132
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.setLiveSeekableRange πŸ“‹Firefox11/15/2016 Safari3/27/2017132
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.sourceended_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onsourceended event handler property is not supported.Chrome Android: The onsourceended event handler property is not supported.Edge: The onsourceended event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onsourceended event handler property is not supported.Opera Android: The onsourceended event handler property is not supported.Safari: The onsourceended event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onsourceended event handler property is not supported.WebView Android: The onsourceclose event handler property is not supported.
api.MediaSource.sourceopen_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onsourceopen event handler property is not supported.Chrome Android: The onsourceopen event handler property is not supported.Edge: The onsourceopen event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onsourceopen event handler property is not supported.Opera Android: The onsourceopen event handler property is not supported.Safari: The onsourceopen event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onsourceopen event handler property is not supported.WebView Android: The onsourceopen event handler property is not supported.
api.Navigator.getGamepads πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.Navigator.languages πŸ“‹Firefox9/2/2014 Safari3/27/2017937
Chrome: Before Chrome 65, navigator.languages[0] is not guaranteed to equal navigator.language.Chrome Android: Before Chrome Android 65, navigator.languages[0] is not guaranteed to equal navigator.language.Firefox: In Firefox, the navigator.languages property's value is taken from the intl.accept_languages preference.Firefox for Android: In Firefox for Android, the navigator.languages property's value is taken from the intl.accept_languages preference.Internet Explorer: Closest available (non-standard) properties are userLanguage and browserLanguage.Quest Browser: Before Quest Browser 5.0, navigator.languages[0] is not guaranteed to equal navigator.language.WebView Android: Before version 65, navigator.languages[0] is not guaranteed to equal navigator.language.
api.PerformanceTiming.toJSON πŸ“‹Firefox10/29/2013 Safari3/27/20171245
api.Request πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Chrome: Only available in service workers.Chrome Android: Only available in service workers.Opera: Only available in service workers.Opera Android: Only available in service workers.WebView Android: Only available in service workers.
api.Request.Request πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Chrome: From Chrome 47, default values for the init argument's properties changed. mode defaults to same-origin (from no-cors). credentials defaults to include (from same-origin). redirect defaults to follow (from manual).Chrome Android: From Chrome Android 47, default values for the init argument's properties changed. mode defaults to same-origin (from no-cors). credentials defaults to include (from same-origin). redirect defaults to follow (from manual).Deno: Fetching with a "manual" redirect mode does not result in a "opaqueredirect" response, but a regular response.Quest Browser: From Quest Browser 5.0, default values for the init argument's properties changed. mode defaults to same-origin (from no-cors). credentials defaults to include (from same-origin). redirect defaults to follow (from manual).Samsung Internet: From Samsung Internet 5.0, default values for the init argument's properties changed. mode defaults to same-origin (from no-cors). credentials defaults to include (from same-origin). redirect defaults to follow (from manual).WebView Android: From WebView Android 47, default values for the init argument's properties changed. mode defaults to same-origin (from no-cors). credentials defaults to include (from same-origin). redirect defaults to follow (from manual).
api.Request.Request.init_referrer_parameter πŸ“‹Firefox6/7/2016 Safari3/27/2017293
api.Request.arrayBuffer πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.blob πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.bodyUsed πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.cache πŸ“‹Firefox8/2/2016 Safari3/27/2017237
api.Request.cache.only-if-cached Firefox11/15/2016 Safari3/27/2017132
api.Request.clone πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.credentials πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.headers πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.integrity πŸ“‹Firefox1/24/2017 Safari3/27/201762
api.Request.json πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.method πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.mode πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.mode.navigate_mode Firefox4/26/2016 Safari3/27/2017335
api.Request.redirect πŸ“‹Firefox12/15/2015 Safari3/27/2017468
Deno: Fetching with a "manual" redirect mode does not result in a "opaqueredirect" response, but a regular response.
api.Request.referrer πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.referrerPolicy πŸ“‹Firefox6/7/2016 Safari3/27/2017293
api.Request.text πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Request.url πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Chrome: Fragment support added in Chrome 59.Chrome Android: Fragment support added in Chrome Android 59.Quest Browser: Fragment support added in Quest Browser 5.0.Opera: Fragment support added in Opera 46.Opera Android: Fragment support added in Opera 46.Samsung Internet: Fragment support added in Samsung Internet 7.0.WebView Android: Fragment support added in WebView Android 59.
api.Response πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Chrome: Only available in service workers.Chrome Android: Only available in service workers.Opera: Only available in service workers.Opera Android: Only available in service workers.WebView Android: Only available in service workers.
api.Response.Response πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.Response.accept_readablestream Firefox7/2/2015 Safari3/27/2017634
api.Response.arrayBuffer πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.blob πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.bodyUsed πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.clone πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.error_static πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.headers πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.json πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.ok πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.redirect_static πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.redirected πŸ“‹Firefox9/20/2016 Safari3/27/2017188
api.Response.status πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.statusText πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.text πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.type πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.Response.url πŸ“‹Firefox7/2/2015 Safari3/27/2017634
api.SourceBuffer.abort_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onabort event handler property is not supported.Chrome Android: The onabort event handler property is not supported.Edge: The onabort event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onabort event handler property is not supported.Opera Android: The onabort event handler property is not supported.Safari: The onabort event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onabort event handler property is not supported.WebView Android: The onabort event handler property is not supported.
api.SourceBuffer.error_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onerror event handler property is not supported.Chrome Android: The onerror event handler property is not supported.Edge: The onerror event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onerror event handler property is not supported.Opera Android: The onerror event handler property is not supported.Safari: The onerror event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onerror event handler property is not supported.WebView Android: The onerror event handler property is not supported.
api.SourceBuffer.update_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onupdate event handler property is not supported.Chrome Android: The onupdate event handler property is not supported.Edge: The onupdate event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onupdate event handler property is not supported.Opera Android: The onupdate event handler property is not supported.Safari: The onupdate event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onupdate event handler property is not supported.WebView Android: The onupdate event handler property is not supported.
api.SourceBuffer.updateend_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onupdateend event handler property is not supported.Chrome Android: The onupdateend event handler property is not supported.Edge: The onupdateend event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onupdateend event handler property is not supported.Opera Android: The onupdateend event handler property is not supported.Safari: The onupdateend event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onupdateend event handler property is not supported.WebView Android: The onupdateend event handler property is not supported.
api.SourceBuffer.updatestart_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onupdatestart event handler property is not supported.Chrome Android: The onupdatestart event handler property is not supported.Edge: The onupdatestart event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onupdatestart event handler property is not supported.Opera Android: The onupdatestart event handler property is not supported.Safari: The onupdatestart event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onupdatestart event handler property is not supported.WebView Android: The onupdatestart event handler property is not supported.
api.SourceBufferList.addsourcebuffer_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onaddsourcebuffer event handler property is not supported.Chrome Android: The onaddsourcebuffer event handler property is not supported.Edge: The onaddsourcebuffer event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onaddsourcebuffer event handler property is not supported.Opera Android: The onaddsourcebuffer event handler property is not supported.Safari: The onaddsourcebuffer event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onaddsourcebuffer event handler property is not supported.WebView Android: The onaddsourcebuffer event handler property is not supported.WebView on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBufferList.removesourcebuffer_event πŸ“‹Firefox11/3/2015 Safari3/27/2017510
Chrome: The onremovesourcebuffer event handler property is not supported.Chrome Android: The onremovesourcebuffer event handler property is not supported.Edge: The onremovesourcebuffer event handler property is not supported.Internet Explorer: Only works on Windows 8+.Opera: The onremovesourcebuffer event handler property is not supported.Opera Android: The onremovesourcebuffer event handler property is not supported.Safari: The onremovesourcebuffer event handler property is not supported.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: The onremovesourcebuffer event handler property is not supported.WebView Android: The onremovesourcebuffer event handler property is not supported.WebView on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.TextDecoder πŸ“‹Firefox2/19/2013 Safari3/27/20171497
Firefox: Implemented a slightly different version of the spec.Firefox for Android: Implemented a slightly different version of the spec.Node.js: Available as a part of the util module.
api.TextDecoder.TextDecoder πŸ“‹Firefox2/19/2013 Safari3/27/20171497
Firefox: Implemented a slightly different version of the spec.Firefox for Android: Implemented a slightly different version of the spec.
api.TextDecoder.decode πŸ“‹Firefox2/19/2013 Safari3/27/20171497
Deno: Before Deno 1.11, passing option.stream is not supported and results in an error being thrown.Firefox: Implemented a slightly different version of the spec.Firefox for Android: Implemented a slightly different version of the spec.
api.TextDecoder.encoding πŸ“‹Firefox2/19/2013 Safari3/27/20171497
Firefox: Implemented a slightly different version of the spec.Firefox for Android: Implemented a slightly different version of the spec.
api.TextDecoder.fatal πŸ“‹Firefox2/24/2015 Safari3/27/2017762
api.TextDecoder.worker_support Firefox4/2/2013 Safari3/27/20171455
api.TextEncoder πŸ“‹Firefox1/8/2013 Safari3/27/20171539
Node.js: Available as a part of the util module.
api.TextEncoder.TextEncoder πŸ“‹Firefox1/8/2013 Safari3/27/20171539
api.TextEncoder.encode πŸ“‹Firefox1/8/2013 Safari3/27/20171539
api.TextEncoder.encoding πŸ“‹Firefox1/8/2013 Safari3/27/20171539
api.TextEncoder.worker_support Firefox4/2/2013 Safari3/27/20171455
api.URL.searchParams πŸ“‹Firefox4/29/2014 Safari3/27/20171063
Node.js: An object matching the URLSearchParams interface is returned, but it contains no data.
api.URLSearchParams πŸ“‹Firefox4/29/2014 Safari3/27/20171063
Firefox: Before version 57 single quotes in URLs were escaped (see bug 1386683).Firefox for Android: Before version 57 single quotes in URLs were escaped (see bug 1386683).Node.js: Available as a part of the url module.Node.js: Only available as an internal instance, but can be accessed via the searchParams property of the URL interface.Node.js: Available as a part of the url module.
api.URLSearchParams.@@iterator πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.URLSearchParams.URLSearchParams πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.URLSearchParams.USVString Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.append πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.entries πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.URLSearchParams.forEach πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.URLSearchParams.get πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.getAll πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.has πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.keys πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.URLSearchParams.set πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.toString πŸ“‹Firefox4/29/2014 Safari3/27/20171063
api.URLSearchParams.values πŸ“‹Firefox1/26/2016 Safari3/27/2017426
api.Window.languagechange_event πŸ“‹Firefox9/2/2014 Safari3/27/2017937
api.Window.scroll.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Window.scroll.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.Window.scrollBy.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Window.scrollBy.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.Window.scrollTo.options_left_parameter Firefox2/24/2015 Safari3/27/2017762
api.Window.scrollTo.options_top_parameter Firefox2/24/2015 Safari3/27/2017762
api.WorkerNavigator.languages πŸ“‹Firefox9/2/2014 Safari3/27/2017937
Chrome: Before Chrome 65, navigator.languages[0] is not guaranteed to equal navigator.language.Chrome Android: Before Chrome Android 65, navigator.languages[0] is not guaranteed to equal navigator.language.Firefox: In Firefox, the navigator.languages property's value is taken from the intl.accept_languages preference.Firefox for Android: In Firefox for Android, the navigator.languages property's value is taken from the intl.accept_languages preference.Internet Explorer: Closest available (non-standard) properties are userLanguage and browserLanguage.Quest Browser: Before Quest Browser 5.0, navigator.languages[0] is not guaranteed to equal navigator.language.WebView Android: Before version 65, navigator.languages[0] is not guaranteed to equal navigator.language.
api.crypto.worker_support Firefox8/2/2016 Safari3/27/2017237
api.fetch πŸ“‹Firefox7/2/2015 Safari3/27/2017634
Deno: Fetching with a "manual" redirect mode does not result in a "opaqueredirect" response, but a regular response.
api.fetch.blob_data_support Firefox7/2/2015 Safari3/27/2017634
css.at-rules.keyframes.ignore_important_declarations Firefox2/19/2013 Safari3/27/20171497
css.properties.align-content.grid_context πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.align-items.grid_context πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.align-self.grid_context πŸ“‹Firefox3/7/2017 Safari3/27/201720
Internet Explorer: Internet Explorer 10 and 11 have the property -ms-grid-row-align, which acts in a similar way to align-self.
css.properties.display.grid Firefox3/7/2017 Safari3/27/201720
Internet Explorer: Internet Explorer implements an older version of the specification.Samsung Internet: Samsung Internet added this earlier than the corresponding Chrome version would indicate.
css.properties.display.inline-grid Firefox3/7/2017 Safari3/27/201720
Internet Explorer: Internet Explorer implements an older version of the specification.Samsung Internet: Samsung Internet added this earlier than the corresponding Chrome version would indicate.
css.properties.font-synthesis.style Firefox12/1/2014 Safari3/27/2017847
css.properties.font-synthesis.weight Firefox12/1/2014 Safari3/27/2017847
css.properties.gap πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.gap.normal πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid πŸ“‹Firefox3/7/2017 Safari3/27/201720
Samsung Internet: This was added early so is out of sync with the equivalent Chromium version.
css.properties.grid.none πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-area πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-area.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-columns.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-flow πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-flow.column πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-flow.dense πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-flow.row πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-auto-rows.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column-end πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column-end.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column-start πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-column-start.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row-end πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row-end.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row-start πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-row-start.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template.none πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-areas πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-areas.none πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.fit-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.max-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.min-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.minmax πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-columns.none πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.auto πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.fit-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.max-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.min-content πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.minmax πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.grid-template-rows.none πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.justify-content.grid_context πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.justify-items.grid_context πŸ“‹Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self πŸ“‹Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self.auto Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self.grid_context πŸ“‹Firefox3/8/2016 Safari3/27/2017384
Internet Explorer: Internet Explorer 10 and 11 have the property -ms-grid-column-align, which acts in a similar way to justify-self.
css.properties.justify-self.left Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self.normal Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self.right Firefox3/8/2016 Safari3/27/2017384
css.properties.justify-self.stretch Firefox3/8/2016 Safari3/27/2017384
css.properties.row-gap πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.row-gap.normal πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.properties.writing-mode πŸ“‹Firefox9/22/2015 Safari3/27/2017552
Firefox: Firefox 42 added support for bidirectional and RTL scripts in vertical modes.Firefox for Android: Firefox for Android 42 added support for bidirectional and RTL scripts in vertical modes.Internet Explorer: Internet Explorer's implementation differs from the specification.Internet Explorer: Internet Explorer's implementation differs from the specification.
css.properties.writing-mode.lr Firefox12/15/2015 Safari3/27/2017468
css.properties.writing-mode.lr-tb Firefox12/15/2015 Safari3/27/2017468
css.properties.writing-mode.rl Firefox12/15/2015 Safari3/27/2017468
css.properties.writing-mode.rl-tb Firefox12/15/2015 Safari3/27/2017468
css.properties.writing-mode.tb Firefox12/15/2015 Safari3/27/2017468
css.properties.writing-mode.tb-rl Firefox12/15/2015 Safari3/27/2017468
css.selectors.focus-within πŸ“‹Firefox3/7/2017 Safari3/27/201720
css.selectors.placeholder πŸ“‹Firefox1/24/2017 Safari3/27/201762
css.types.flex πŸ“‹Firefox8/11/2015 Safari3/27/2017594
css.types.number.scientific_notation Firefox4/29/2014 Safari3/27/20171063
html.elements.a.download πŸ“‹Firefox4/2/2013 Safari3/27/20171455
Chrome: Starting in Chrome 65, cross-origin downloads are not supported on the <a> element.Chrome Android: Starting in Chrome Android 65, cross-origin downloads are not supported on the <a> element.Edge: Starting in Edge 79, cross-origin downloads are not supported on the <a> element.Edge: Until Edge 14 (build 14357), attempting to download data URIs caused Edge to crash (bug 7160092).Edge: Edge 17 or older didn't follow the attributes' value to determine filename (bug 7260192).Firefox for Android: The attribute's filename value only affects the suggested file name for the blob: and data: URI schemes. Other schemes ignore the suggested filename. See bug 1845642.Quest Browser: Starting in Quest Browser 5.0, cross-origin downloads are not supported on the <a> element.Opera: Starting in Opera 52, cross-origin downloads are not supported on the <a> element.Opera Android: Starting in Opera Android 47, cross-origin downloads are not supported on the <a> element.Samsung Internet: Starting in Samsung Internet 9.0, cross-origin downloads are not supported on the <a> element.WebView Android: Starting in WebView Android 65, cross-origin downloads are not supported on the <a> element.
html.elements.a.rel.noopener πŸ“‹Firefox3/7/2017 Safari3/27/201720
Firefox: Before Firefox 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox 63, these windows have the same features enabled by default as any other window.Firefox for Android: Before Firefox for Android 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox for Android 63, these windows have the same features enabled by default as any other window.
html.elements.area.download πŸ“‹Firefox4/2/2013 Safari3/27/20171455
html.elements.area.rel.noopener πŸ“‹Firefox3/7/2017 Safari3/27/201720
Firefox: Before Firefox 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox 63, these windows have the same features enabled by default as any other window.Firefox for Android: Before Firefox for Android 63, rel="noopener" created windows with all features disabled by default. Starting with Firefox for Android 63, these windows have the same features enabled by default as any other window.
html.elements.form.novalidate πŸ“‹Firefox3/22/2011 Safari3/27/20172197
html.elements.hr.color Firefox11/9/2004 Safari3/27/20174521
html.elements.iframe.allowfullscreen πŸ“‹Firefox1/8/2013 Safari3/27/20171539
Safari on iOS: Only available on iPad, not on iPhone.Safari on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.WebView on iOS: Only available on iPad, not on iPhone.WebView on iOS: Shows an overlay button which can not be disabled. Swiping down exits fullscreen mode, making it unsuitable for some use cases like games.
html.elements.iframe.sandbox.allow-pointer-lock πŸ“‹Firefox9/20/2016 Safari3/27/2017188
html.elements.input.minlength πŸ“‹Firefox1/24/2017 Safari3/27/201762
html.elements.meta.http-equiv.content-language πŸ“‹Firefox11/9/2004 Safari3/27/20174521
html.elements.meta.http-equiv.content-security-policy πŸ“‹Firefox11/9/2004 Safari3/27/20174521
html.elements.meta.http-equiv.content-type πŸ“‹Firefox11/9/2004 Safari3/27/20174521
html.elements.textarea.minlength πŸ“‹Firefox1/24/2017 Safari3/27/201762
http.headers.Content-Security-Policy.upgrade-insecure-requests πŸ“‹Firefox11/3/2015 Safari3/27/2017510
http.headers.Upgrade-Insecure-Requests πŸ“‹Firefox8/2/2016 Safari3/27/2017237
javascript.builtins.Array.sort.stable_sorting Firefox6/17/2008 Safari3/27/20173205
javascript.builtins.AsyncFunction πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.builtins.AsyncFunction.AsyncFunction πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.builtins.Date.UTC.optional_monthIndex Firefox3/22/2011 Safari3/27/20172197
javascript.builtins.Intl.getCanonicalLocales πŸ“‹Firefox8/2/2016 Safari3/27/2017237
javascript.builtins.Object.entries πŸ“‹Firefox6/7/2016 Safari3/27/2017293
javascript.builtins.Object.values πŸ“‹Firefox6/7/2016 Safari3/27/2017293
javascript.functions.method_definitions.async_methods Firefox3/7/2017 Safari3/27/201720
javascript.operators.async_function πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.operators.await πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.operators.exponentiation πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.operators.exponentiation_assignment πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.statements.async_function πŸ“‹Firefox3/7/2017 Safari3/27/201720
javascript.statements.class πŸ“‹Firefox3/8/2016 Safari3/27/2017384
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
api.Document.selectionchange_event πŸ“‹Safari7/20/2011 Firefox3/7/20172057
api.Element.focusin_event πŸ“‹Safari6/7/2010 Firefox3/7/20172465
Chrome: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Chrome Android: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Edge: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Firefox: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Firefox for Android: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Quest Browser: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.Samsung Internet: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.WebView Android: The onfocusin event handler property is not supported. To listen to this event, use element.addEventListener('focusin', function() {});.
api.Element.focusout_event πŸ“‹Safari6/7/2010 Firefox3/7/20172465
Chrome: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Chrome Android: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Edge: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Firefox: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Firefox for Android: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Quest Browser: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.Samsung Internet: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.WebView Android: The onfocusout event handler property is not supported. To listen to this event, use element.addEventListener('focusout', function() {});.
api.Event.composed πŸ“‹Safari9/20/2016 Firefox3/7/2017168
Firefox: Before Firefox 95, this property was incorrectly set to false on <select> and <input type='checkbox'> elements.Firefox for Android: Before Firefox for Android 95, this property was incorrectly set to false on <select> and <input type='checkbox'> elements.Node.js: This is not used in Node.js and is provided purely for completeness.
api.Node.selectstart_event πŸ“‹Safari4/15/2005 Firefox3/7/20174344
css.properties.align-content.flex_context.stretch Safari9/30/2015 Firefox3/7/2017524
css.properties.align-self.flex_context.stretch πŸ“‹Safari9/30/2015 Firefox3/7/2017524
css.properties.clip-path.svg_elements Safari10/22/2013 Firefox3/7/20171232
css.properties.column-count πŸ“‹Safari9/30/2015 Firefox3/7/2017524
Firefox: Before version 37, multiple columns didn't work with display: table-caption elements.Firefox for Android: Before version 37, multiple columns didn't work with display: table-caption elements.
css.properties.column-fill πŸ“‹Safari9/30/2015 Firefox3/7/2017524
css.properties.column-gap.multicol_context πŸ“‹Safari9/20/2016 Firefox3/7/2017168
Firefox: Before Firefox 3, the default value for the normal keyword was 0 and not 1em.
css.properties.column-rule πŸ“‹Safari9/30/2015 Firefox3/7/2017524
Firefox: Before Firefox 3, the default value for the normal keyword was 0 and not 1em.
css.properties.column-rule-color πŸ“‹Safari9/30/2015 Firefox3/7/2017524
css.properties.column-rule-style πŸ“‹Safari9/30/2015 Firefox3/7/2017524
css.properties.column-rule-width πŸ“‹Safari9/30/2015 Firefox3/7/2017524
css.properties.columns πŸ“‹Safari9/30/2015 Firefox3/7/2017524
Firefox: Before version 37, multiple columns didn't work with display: table-caption elements.Firefox for Android: Before version 37, multiple columns didn't work with display: table-caption elements.
css.properties.justify-content.flex_context.left_right Safari9/30/2015 Firefox3/7/2017524
Internet Explorer: This value is recognized, but has no effect.Opera Android: This value is recognized, but has no effect.
css.properties.justify-content.flex_context.stretch Safari9/30/2015 Firefox3/7/2017524
javascript.builtins.Array.toLocaleString.locales_parameter Safari10/22/2013 Firefox3/7/20171232
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Array.toLocaleString.options_parameter Safari10/22/2013 Firefox3/7/20171232
javascript.builtins.Date.toLocaleDateString.iana_time_zone_names Safari10/22/2013 Firefox3/7/20171232
javascript.builtins.Date.toLocaleString.iana_time_zone_names Safari10/22/2013 Firefox3/7/20171232
javascript.builtins.Date.toLocaleTimeString.iana_time_zone_names Safari10/22/2013 Firefox3/7/20171232
javascript.builtins.Float32Array.Float32Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Float64Array.Float64Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Int16Array.Int16Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Int32Array.Int32Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Int8Array.Int8Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter.iana_time_zones Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.TypedArray.iterable_in_constructor Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Uint16Array.Uint16Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Uint32Array.Uint32Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Uint8Array.Uint8Array.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.iterable_allowed Safari9/20/2016 Firefox3/7/2017168
javascript.functions.arrow_functions.trailing_comma Safari9/20/2016 Firefox3/7/2017168
javascript.functions.rest_parameters.destructuring Safari9/20/2016 Firefox3/7/2017168
javascript.grammar.trailing_commas.trailing_commas_in_functions Safari9/20/2016 Firefox3/7/2017168
javascript.operators.function.trailing_comma Safari9/20/2016 Firefox3/7/2017168
javascript.operators.generator_function.trailing_comma Safari9/20/2016 Firefox3/7/2017168
javascript.statements.function.trailing_comma_in_parameters Safari9/20/2016 Firefox3/7/2017168
javascript.statements.generator_function.trailing_comma_in_parameters Safari9/20/2016 Firefox3/7/2017168

2017/1

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.imageSmoothingEnabled πŸ“‹Safari3/21/2016 Firefox1/24/2017309
api.DOMTokenList.trim_whitespace Safari9/20/2016 Firefox1/24/2017126
api.Element.animationend_event πŸ“‹Safari9/30/2015 Firefox1/24/2017482
Chrome: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Chrome Android: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Edge: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Firefox: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Firefox for Android: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Internet Explorer: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Quest Browser: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Opera: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Opera Android: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.Samsung Internet: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.WebView Android: The onanimationend event handler property is not supported. To listen to this event, use document.addEventListener('animationend', function() {});.
api.Element.animationiteration_event πŸ“‹Safari9/30/2015 Firefox1/24/2017482
Chrome: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Chrome Android: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Edge: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Firefox: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Firefox for Android: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Internet Explorer: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Quest Browser: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Opera: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Opera Android: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.Samsung Internet: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.WebView Android: The onanimationiteration event handler property is not supported. To listen to this event, use document.addEventListener('animationiteration', function() {});.
api.Element.animationstart_event πŸ“‹Safari9/30/2015 Firefox1/24/2017482
Chrome: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Chrome Android: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Edge: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Firefox: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Firefox for Android: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Internet Explorer: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Quest Browser: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Opera: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Opera Android: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.Samsung Internet: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.WebView Android: The onanimationstart event handler property is not supported. To listen to this event, use document.addEventListener('animationstart', function() {});.
api.Element.transitionend_event πŸ“‹Safari10/22/2013 Firefox1/24/20171190
Edge: The ontransitionend event handler property is not supported. To listen to this event, use element.addEventListener('transitionend', function() {});.Internet Explorer: The ontransitionend event handler property is not supported. To listen to this event, use element.addEventListener('transitionend', function() {});.
api.SVGElement.blur πŸ“‹Safari10/26/2007 Firefox1/24/20173378
api.SVGElement.dataset πŸ“‹Safari7/20/2011 Firefox1/24/20172015
api.SVGElement.focus πŸ“‹Safari10/26/2007 Firefox1/24/20173378
api.SVGElement.tabIndex πŸ“‹Safari10/16/2014 Firefox1/24/2017831
api.ValidityState.tooShort πŸ“‹Safari9/20/2016 Firefox1/24/2017126
css.selectors.indeterminate.radio Safari9/20/2016 Firefox1/24/2017126
css.selectors.placeholder-shown πŸ“‹Safari9/30/2015 Firefox1/24/2017482
javascript.builtins.Symbol.toStringTag πŸ“‹Safari9/20/2016 Firefox1/24/2017126
javascript.builtins.TypedArray.toLocaleString πŸ“‹Safari7/20/2011 Firefox1/24/20172015
javascript.builtins.TypedArray.toString πŸ“‹Safari7/20/2011 Firefox1/24/20172015

2016/11

API First Browser Date Last Browser Date Days Notes
api.DataTransferItem πŸ“‹Safari7/20/2011 Firefox11/15/20161945
api.DataTransferItem.getAsFile πŸ“‹Safari7/20/2011 Firefox11/15/20161945
api.DataTransferItem.getAsString πŸ“‹Safari7/20/2011 Firefox11/15/20161945
api.DataTransferItem.kind πŸ“‹Safari7/20/2011 Firefox11/15/20161945
api.DataTransferItem.type πŸ“‹Safari7/20/2011 Firefox11/15/20161945
api.DataTransferItemList πŸ“‹Safari7/25/2012 Firefox11/15/20161574
api.DataTransferItemList.add πŸ“‹Safari7/25/2012 Firefox11/15/20161574
api.DataTransferItemList.clear πŸ“‹Safari7/25/2012 Firefox11/15/20161574
api.DataTransferItemList.length πŸ“‹Safari7/25/2012 Firefox11/15/20161574
api.DataTransferItemList.remove πŸ“‹Safari7/25/2012 Firefox11/15/20161574
api.EventTarget.addEventListener.options_parameter.options_once_parameter πŸ“‹Safari9/20/2016 Firefox11/15/201656
api.NodeList.entries Safari9/20/2016 Firefox11/15/201656
api.NodeList.forEach πŸ“‹Safari9/20/2016 Firefox11/15/201656
api.NodeList.keys Safari9/20/2016 Firefox11/15/201656
api.NodeList.values Safari9/20/2016 Firefox11/15/201656
css.properties.background.border-box πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.bottom πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.center πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.content-box πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.fixed πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.left πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.padding-box πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.right πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background.top πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.background-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-bottom.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-bottom-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-image-repeat.space πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-left.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-left-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-right.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-right-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-top.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.border-top-color.currentColor πŸ“‹Safari3/21/2016 Firefox11/15/2016239
css.properties.column-width πŸ“‹Safari9/30/2015 Firefox11/15/2016412
Firefox: Before version 37, multiple columns didn't work with display: table-caption elements.Firefox for Android: Before version 37, multiple columns didn't work with display: table-caption elements.
css.properties.pointer-events.visibleFill πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.pointer-events.visiblePainted πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.pointer-events.visibleStroke πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.shape-rendering.crispEdges πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.shape-rendering.geometricPrecision πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.shape-rendering.optimizeSpeed πŸ“‹Safari6/8/2009 Firefox11/15/20162717
css.properties.text-rendering.optimizeLegibility πŸ“‹Safari6/7/2010 Firefox11/15/20162353
css.properties.text-rendering.optimizeSpeed πŸ“‹Safari6/7/2010 Firefox11/15/20162353
css.selectors.any-link πŸ“‹Safari9/30/2015 Firefox11/15/2016412
html.elements.track.src πŸ“‹Safari7/25/2012 Firefox11/15/20161574
Firefox: Before Firefox 50, setting the src didn't work, though it didn't raise an error.Firefox for Android: Before Firefox for Android 50, setting the src didn't work, though it didn't raise an error.
http.headers.Content-Security-Policy.connect-src πŸ“‹Safari10/22/2013 Firefox11/15/20161120
Firefox: Before Firefox 50, ping attributes of <a> elements weren't covered by connect-src.
http.headers.Content-Security-Policy.sandbox πŸ“‹Safari10/22/2013 Firefox11/15/20161120
http.headers.Content-Security-Policy.worker_support Safari9/20/2016 Firefox11/15/201656
javascript.builtins.Function.@@hasInstance πŸ“‹Safari9/20/2016 Firefox11/15/201656
javascript.builtins.Object.getOwnPropertyDescriptors πŸ“‹Safari9/20/2016 Firefox11/15/201656
javascript.builtins.Symbol.hasInstance πŸ“‹Safari9/20/2016 Firefox11/15/201656

2016/9

API First Browser Date Last Browser Date Days Notes
api.CharacterData.after πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.CharacterData.before πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.CharacterData.replaceWith πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DOMTokenList.value πŸ“‹Firefox6/7/2016 Safari9/20/2016105
Chrome: Before Chrome 50, this property was part of the deprecated child DOMSettableTokenList interface.Chrome Android: Before Chrome Android 50, this property was part of the deprecated child DOMSettableTokenList interface.Quest Browser: Before Quest Browser 5.0, this property was part of the deprecated child DOMSettableTokenList interface.Opera: Before Opera 37, this property was part of the deprecated child DOMSettableTokenList interface.Opera Android: Before Opera Android 37, this property was part of the deprecated child DOMSettableTokenList interface.Samsung Internet: Before Samsung Internet 5.0, this property was part of the deprecated child DOMSettableTokenList interface.WebView Android: Before WebView Android 50, this property was part of the deprecated child DOMSettableTokenList interface.
api.Document.append πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Document.execCommand.copy Firefox9/22/2015 Safari9/20/2016364
api.Document.execCommand.cut Firefox9/22/2015 Safari9/20/2016364
api.Document.fonts πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.Document.prepend πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DocumentFragment.append πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DocumentFragment.prepend πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DocumentType.after πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DocumentType.before πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.DocumentType.replaceWith πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Element.after πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Element.append πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Element.before πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Element.prepend πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.Element.replaceWith πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.ErrorEvent.error πŸ“‹Firefox7/22/2014 Safari9/20/2016791
api.Event.isTrusted πŸ“‹Firefox11/29/2005 Safari9/20/20163948
Chrome: Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.Chrome Android: Starting with Chrome Android 53 and Opera 40, untrusted events do not invoke the default action.Internet Explorer: In Internet Explorer, all events are trusted except those that are created with the createEvent() method.Quest Browser: Starting with Quest Browser 5.0 and Opera 40, untrusted events do not invoke the default action.Opera: Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.Opera Android: Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.Samsung Internet: Starting with Samsung Internet 6.0 and Opera 40, untrusted events do not invoke the default action.WebView Android: Starting with version 53, untrusted events do not invoke the default action.
api.EventTarget.addEventListener.options_parameter Firefox9/20/2016 Safari9/20/2016
api.EventTarget.addEventListener.options_parameter.options_capture_parameter πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.EventTarget.addEventListener.options_parameter.options_passive_parameter πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.EventTarget.removeEventListener.options_parameter Firefox9/20/2016 Safari9/20/2016
api.File.lastModified πŸ“‹Firefox8/28/2012 Safari9/20/20161484
api.FontFace πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.FontFace πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.family πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.featureSettings πŸ“‹Firefox9/22/2015 Safari9/20/2016364
Chrome: The property can be set, but has no effect. See bug 324519293Chrome Android: The property can be set, but has no effect. See bug 324519293Edge: The property can be set, but has no effect. See bug 324519293Quest Browser: The property can be set, but has no effect. See bug 324519293Opera: The property can be set, but has no effect. See bug 324519293Opera Android: The property can be set, but has no effect. See bug 324519293WebView Android: The property can be set, but has no effect. See bug 324519293
api.FontFace.load πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.loaded πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.status πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.stretch πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.style πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.unicodeRange πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFace.weight πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet πŸ“‹Firefox9/22/2015 Safari9/20/2016364
Chrome: Chrome does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Chrome Android: Chrome Android does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Edge: Edge does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Quest Browser: Quest Browser does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Opera: Opera does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Opera Android: Opera Android does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.Samsung Internet: Samsung Internet does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.WebView Android: WebView Android does not expose the FontFaceSet interface directly, and is only available through Document.fonts or WorkerGlobalScope.fonts.
api.FontFaceSet.@@iterator πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.add πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.check πŸ“‹Firefox9/22/2015 Safari9/20/2016364
Chrome: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Chrome Android: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Edge: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Quest Browser: Prior to version false, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Opera: Prior to version 106, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Opera Android: Prior to version 80, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.Samsung Internet: Prior to version 25.0, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.WebView Android: Prior to version 120, this method returned false instead of true for nonexistent or locally installed fonts. See bug 40893726.
api.FontFaceSet.clear πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.delete πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.entries Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.forEach Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.has Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.keys Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.load πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.loading_event πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.loadingdone_event πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.loadingerror_event πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.ready πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.size Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.status πŸ“‹Firefox9/22/2015 Safari9/20/2016364
api.FontFaceSet.values Firefox9/22/2015 Safari9/20/2016364
api.HTMLAnchorElement.password πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.HTMLAnchorElement.username πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.HTMLAreaElement.origin πŸ“‹Firefox12/10/2013 Safari9/20/20161015
Firefox: Before Firefox 49, results for URL using the blob scheme incorrectly returned null.Firefox for Android: Before Firefox for Android 49, results for URL using the blob scheme incorrectly returned null.
api.HTMLAreaElement.password πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.HTMLAreaElement.username πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.HTMLCanvasElement.webglcontextcreationerror_event πŸ“‹Safari7/20/2011 Firefox9/20/20161889
api.HTMLDataElement πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.HTMLDataElement.value πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.HTMLDetailsElement πŸ“‹Safari7/25/2012 Firefox9/20/20161518
api.HTMLDetailsElement.open πŸ“‹Safari7/25/2012 Firefox9/20/20161518
api.HTMLLinkElement.crossOrigin πŸ“‹Firefox1/8/2013 Safari9/20/20161351
api.HTMLMediaElement.crossOrigin πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.HTMLTimeElement πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.HTMLTimeElement.dateTime πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.IDBCursor.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBCursorWithValue.worker_support Firefox11/3/2015 Safari9/20/2016322
api.IDBDatabase.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBFactory.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBIndex.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBKeyRange.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBObjectStore.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBOpenDBRequest.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBRequest.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBTransaction.worker_support Firefox3/31/2015 Safari9/20/2016539
api.IDBVersionChangeEvent.IDBVersionChangeEvent πŸ“‹Firefox10/29/2013 Safari9/20/20161057
api.IDBVersionChangeEvent.worker_support Firefox3/31/2015 Safari9/20/2016539
api.Node.isConnected πŸ“‹Firefox9/20/2016 Safari9/20/2016
api.NodeList.@@iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
api.SpeechSynthesis πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.cancel πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.getVoices πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.pause πŸ“‹Safari10/22/2013 Firefox9/20/20161064
Chrome Android: In Android, pause() ends the current utterance. pause() behaves the same as cancel().Firefox for Android: In Android, pause() ends the current utterance. pause() behaves the same as cancel().Quest Browser: In Android, pause() ends the current utterance. pause() behaves the same as cancel().Samsung Internet: In Android, pause() ends the current utterance. pause() behaves the same as cancel().
api.SpeechSynthesis.paused πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.pending πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.resume πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.speak πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesis.speaking πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisErrorEvent πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisErrorEvent.error πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisEvent πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisEvent.charIndex πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisEvent.elapsedTime πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisEvent.name πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.SpeechSynthesisUtterance πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.boundary_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
Chrome: The boundary event does not fire as expected. See bug 40715888.Chrome Android: The boundary event does not fire as expected. See bug 40715888.Quest Browser: The boundary event does not fire as expected. See bug 40715888.
api.SpeechSynthesisUtterance.end_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.error_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.lang πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.mark_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.pause_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.pitch πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.rate πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.resume_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.start_event πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.text πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.voice πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisUtterance.volume πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisVoice πŸ“‹Safari10/22/2013 Firefox9/20/20161064
Firefox: In Firefox, speech synthesis voices do not start loading until after the first call to window.speechSynthesis.getVoices(). A way to mitigate this issue is to call the method at the beginning of page load, then wait a few seconds before calling the method again. Voices will remain loaded until all tabs that have called this method have been closed.
api.SpeechSynthesisVoice.default πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisVoice.lang πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisVoice.localService πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisVoice.name πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.SpeechSynthesisVoice.voiceURI πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.URL.hostname πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.URL.href πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.URL.origin πŸ“‹Firefox12/10/2013 Safari9/20/20161015
Firefox: Before Firefox 49, Results for URL using the blob scheme incorrectly returned null.Firefox for Android: Before Firefox for Android 49, Results for URL using the blob scheme incorrectly returned null.
api.URL.password πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.URL.pathname πŸ“‹Firefox6/25/2013 Safari9/20/20161183
Firefox: Before Firefox 53, pathname and search returned wrong values for custom protocols. Given protocol:host/x?a=true&b=false, pathname would return "/x?a=true&b=false" and search would return "", rather than "/x" and "?a=true&b=false" respectively. See bug 1310483.Firefox for Android: Before Firefox for Android 53, pathname and search returned wrong values for custom protocols. Given protocol:host/x?a=true&b=false, pathname would return "/x?a=true&b=false" and search would return "", rather than "/x" and "?a=true&b=false" respectively. See bug 1310483.
api.URL.port πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.URL.protocol πŸ“‹Firefox6/25/2013 Safari9/20/20161183
api.URL.search πŸ“‹Firefox6/25/2013 Safari9/20/20161183
Firefox: Before Firefox 53, pathname and search returned wrong values for custom protocols. Given protocol:host/x?a=true&b=false, pathname would return "/x?a=true&b=false" and search would return "", rather than "/x" and "?a=true&b=false" respectively. See bug 1310483.Firefox for Android: Before Firefox for Android 53, pathname and search returned wrong values for custom protocols. Given protocol:host/x?a=true&b=false, pathname would return "/x?a=true&b=false" and search would return "", rather than "/x" and "?a=true&b=false" respectively. See bug 1310483.
api.URL.username πŸ“‹Firefox12/10/2013 Safari9/20/20161015
api.WebGLContextEvent πŸ“‹Safari7/20/2011 Firefox9/20/20161889
api.WebGLContextEvent.WebGLContextEvent πŸ“‹Safari7/25/2012 Firefox9/20/20161518
api.WebGLContextEvent.statusMessage πŸ“‹Safari7/20/2011 Firefox9/20/20161889
api.Window.speechSynthesis πŸ“‹Safari10/22/2013 Firefox9/20/20161064
api.WorkerLocation.origin πŸ“‹Firefox4/29/2014 Safari9/20/2016875
api.WorkerNavigator.appCodeName πŸ“‹Firefox6/30/2009 Safari9/20/20162639
api.WorkerNavigator.language πŸ“‹Firefox6/30/2009 Safari9/20/20162639
Firefox: Before Firefox 4, this property's value was also part of the user agent string, as reported by navigator.userAgent. Starting in Firefox 5, this property's value is based on the value of the Accept-Language HTTP header.Internet Explorer: Closest available (non-standard) properties are userLanguage and browserLanguage.
api.WorkerNavigator.product πŸ“‹Firefox6/30/2009 Safari9/20/20162639
api.XMLDocument πŸ“‹Firefox11/9/2004 Safari9/20/20164333
Chrome: Implemented as an alias for Document.Chrome Android: Implemented as an alias for Document.Opera: Implemented as an alias for Document.Opera Android: Implemented as an alias for Document.Safari: Implemented as an alias for Document.Safari on iOS: Implemented as an alias for Document.Samsung Internet: Implemented as an alias for Document.WebView Android: Implemented as an alias for Document.WebView on iOS: Implemented as an alias for Document.
api.atob.worker_support Firefox3/22/2011 Safari9/20/20162009
api.btoa.worker_support Firefox3/22/2011 Safari9/20/20162009
api.indexedDB.worker_support Firefox3/31/2015 Safari9/20/2016539
css.at-rules.font-face.WOFF_2 πŸ“‹Firefox7/2/2015 Safari9/20/2016446
Safari: Supported only on macOS 10.12 (Sierra) and later.
css.at-rules.font-face.font-feature-settings πŸ“‹Firefox12/1/2014 Safari9/20/2016659
Firefox: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox: From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.Firefox for Android: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox for Android 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox for Android 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox for Android: From Firefox for Android 4 to Firefox for Android 14 (inclusive), Firefox for Android supported an older, slightly different syntax. See OpenType Font Feature support in Firefox for Android 4.
css.at-rules.media.-webkit-transform-3d πŸ“‹Safari6/8/2009 Firefox9/20/20162661
css.properties.-webkit-mask-position-x Safari3/18/2008 Firefox9/20/20163108
css.properties.-webkit-mask-position-y Safari3/18/2008 Firefox9/20/20163108
css.properties.-webkit-text-fill-color πŸ“‹Safari10/26/2007 Firefox9/20/20163252
css.properties.-webkit-text-stroke πŸ“‹Safari10/26/2007 Firefox9/20/20163252
css.properties.-webkit-text-stroke-color πŸ“‹Safari10/26/2007 Firefox9/20/20163252
css.properties.-webkit-text-stroke-width πŸ“‹Safari10/26/2007 Firefox9/20/20163252
css.properties.background-position-x πŸ“‹Safari6/23/2003 Firefox9/20/20164838
css.properties.background-position-y πŸ“‹Safari6/23/2003 Firefox9/20/20164838
css.properties.background-repeat.round πŸ“‹Safari10/16/2014 Firefox9/20/2016705
css.properties.background-repeat.space πŸ“‹Safari10/16/2014 Firefox9/20/2016705
css.properties.box-align Safari10/26/2007 Firefox9/20/20163252
css.properties.box-direction Safari10/26/2007 Firefox9/20/20163252
css.properties.box-flex Safari10/26/2007 Firefox9/20/20163252
css.properties.box-ordinal-group Safari10/26/2007 Firefox9/20/20163252
css.properties.box-orient Safari10/26/2007 Firefox9/20/20163252
css.properties.box-pack Safari10/26/2007 Firefox9/20/20163252
css.properties.mix-blend-mode.color πŸ“‹Firefox9/2/2014 Safari9/20/2016749
css.properties.mix-blend-mode.hue πŸ“‹Firefox9/2/2014 Safari9/20/2016749
css.properties.mix-blend-mode.luminosity πŸ“‹Firefox9/2/2014 Safari9/20/2016749
css.properties.mix-blend-mode.saturation πŸ“‹Firefox9/2/2014 Safari9/20/2016749
css.properties.object-fit πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Edge: Only supported for <img> elements.
css.properties.object-fit.contain πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-fit.cover πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-fit.fill πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-fit.none πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-fit.scale-down πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-position πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Edge: Only supported for <img> elements.
css.properties.object-position.bottom πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-position.center πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-position.left πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-position.right πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.object-position.top πŸ“‹Firefox2/24/2015 Safari9/20/2016574
css.properties.overflow-wrap πŸ“‹Safari10/22/2013 Firefox9/20/20161064
css.properties.transition.allow-discrete πŸ“‹Firefox3/22/2011 Safari9/20/20162009
css.properties.transition.normal πŸ“‹Firefox3/22/2011 Safari9/20/20162009
css.types.color.rgb_hexadecimal_notation.alpha_hexadecimal_notation Firefox9/20/2016 Safari9/20/2016
html.elements.data πŸ“‹Firefox6/25/2013 Safari9/20/20161183
html.elements.data.value πŸ“‹Firefox6/25/2013 Safari9/20/20161183
html.elements.details πŸ“‹Safari7/25/2012 Firefox9/20/20161518
Firefox: Before Firefox 57, there was a bug meaning that <details> elements can't be made open by default using the open attribute if they have a CSS animation active on them.Firefox for Android: There is a bug meaning that <details> elements can't be made open by default using the open attribute if they have a CSS animation active on them.
html.elements.details.open Safari7/25/2012 Firefox9/20/20161518
html.elements.iframe.sandbox.allow-forms πŸ“‹Safari6/7/2010 Firefox9/20/20162297
html.elements.iframe.sandbox.allow-same-origin πŸ“‹Safari6/7/2010 Firefox9/20/20162297
Chrome: Chrome 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Chrome Android: Chrome Android 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Edge: Edge 79 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Quest Browser: Quest Browser 6.0 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Opera: Opera 57 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Opera Android: Opera Android 49 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Safari: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Safari on iOS: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.Samsung Internet: Samsung Internet 10.0 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.WebView Android: WebView Android 70 and earlier block script execution without allow-scripts, even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.WebView on iOS: Safari blocks script execution without allow-scripts even if allow-same-origin is set. For example, any bound handlers for click events of nodes inside an iframe throw an error for blocked script execution.
html.elements.iframe.sandbox.allow-scripts πŸ“‹Safari6/7/2010 Firefox9/20/20162297
html.elements.iframe.sandbox.allow-top-navigation πŸ“‹Safari6/7/2010 Firefox9/20/20162297
html.elements.link.crossorigin πŸ“‹Firefox1/8/2013 Safari9/20/20161351
Firefox: Before Firefox 83, crossorigin is not supported for rel="icon".Firefox for Android: Before Firefox for Android 83, crossorigin is not supported for rel="icon".
html.elements.summary πŸ“‹Safari7/25/2012 Firefox9/20/20161518
http.headers.Content-Security-Policy.base-uri πŸ“‹Firefox1/13/2015 Safari9/20/2016616
http.headers.Content-Security-Policy.child-src πŸ“‹Firefox3/8/2016 Safari9/20/2016196
http.headers.Content-Security-Policy.form-action πŸ“‹Firefox2/24/2015 Safari9/20/2016574
javascript.builtins.Array.@@iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Array.@@species πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.Array.@@unscopables πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.ArrayBuffer.@@species πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.Date.@@toPrimitive πŸ“‹Firefox1/26/2016 Safari9/20/2016238
javascript.builtins.Date.toLocaleDateString.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleDateString.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Date.toLocaleString.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleString.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Date.toLocaleTimeString.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Date.toLocaleTimeString.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Function.length.configurable_true Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.Function.name.configurable_true Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.Generator πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.builtins.Generator.next πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.builtins.Generator.return πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.Generator.throw πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.builtins.GeneratorFunction πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.builtins.GeneratorFunction.GeneratorFunction πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.builtins.Intl πŸ“‹Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.Collator πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the Collator instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.Collator.Collator.options_ignorePunctuation_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator.Collator.options_localeMatcher_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator.Collator.options_numeric_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator.Collator.options_sensitivity_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator.Collator.options_usage_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.Collator.compare πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.resolvedOptions πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the Collator() constructor for more details.
javascript.builtins.Intl.Collator.supportedLocalesOf πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the DateTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the DateTimeFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.DateTimeFormat.format πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.resolvedOptions πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the DateTimeFormat() constructor for more details.
javascript.builtins.Intl.DateTimeFormat.supportedLocalesOf πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.NumberFormat πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.NumberFormat πŸ“‹Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the NumberFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currency_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_localeMatcher_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumFractionDigits_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumSignificantDigits_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumFractionDigits_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumIntegerDigits_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumSignificantDigits_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_style_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the NumberFormat instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Intl.NumberFormat.format πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Edge: Before Edge 18, numbers are rounded to 15 decimal digits. For example, new Intl.NumberFormat('en-US').format(1000000000000005) returns "1,000,000,000,000,010".Internet Explorer: In Internet Explorer 11, numbers are rounded to 15 decimal digits. For example, new Intl.NumberFormat('en-US').format(1000000000000005) returns "1,000,000,000,000,010".Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.resolvedOptions πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. See the NumberFormat() constructor for more details.
javascript.builtins.Intl.NumberFormat.supportedLocalesOf πŸ“‹Firefox4/29/2014 Safari9/20/2016875
Node.js: Before version 13.0.0, only the locale data for en-US is available by default. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Iterator πŸ“‹Firefox11/20/2012 Safari9/20/20161400
javascript.builtins.Iterator.@@iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Map.@@iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Map.@@species πŸ“‹Firefox9/22/2015 Safari9/20/2016364
javascript.builtins.Number.toLocaleString.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.Number.toLocaleString.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.Promise.@@species πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.Proxy πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.Proxy πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.apply πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.construct πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.defineProperty πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.deleteProperty πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.get πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.getOwnPropertyDescriptor πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.getPrototypeOf πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.Proxy.handler.has πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.isExtensible πŸ“‹Firefox7/22/2014 Safari9/20/2016791
javascript.builtins.Proxy.handler.ownKeys πŸ“‹Firefox1/8/2013 Safari9/20/20161351
Firefox: In Firefox 42, the implementation got updated to reflect the final ES2015 specification: The result is now checked if it is an array and if the array elements are either of type string or of type symbol. Enumerating duplicate own property names is not a failure anymore.Firefox for Android: In Firefox for Android 42, the implementation got updated to reflect the final ES2015 specification: The result is now checked if it is an array and if the array elements are either of type string or of type symbol. Enumerating duplicate own property names is not a failure anymore.
javascript.builtins.Proxy.handler.preventExtensions πŸ“‹Firefox6/25/2013 Safari9/20/20161183
javascript.builtins.Proxy.handler.set πŸ“‹Firefox1/8/2013 Safari9/20/20161351
javascript.builtins.Proxy.handler.setPrototypeOf πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.Proxy.revocable πŸ“‹Firefox12/1/2014 Safari9/20/2016659
javascript.builtins.Reflect πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.apply πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.construct πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.defineProperty πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.deleteProperty πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.get πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.getOwnPropertyDescriptor πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.getPrototypeOf πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.has πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.isExtensible πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.ownKeys πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.preventExtensions πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.set πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.Reflect.setPrototypeOf πŸ“‹Firefox11/3/2015 Safari9/20/2016322
javascript.builtins.RegExp.@@match πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.RegExp.@@replace πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.RegExp.@@search πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.RegExp.@@species πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.RegExp.@@split πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.RegExp.sticky πŸ“‹Firefox6/17/2008 Safari9/20/20163017
javascript.builtins.RegExp.sticky.anchored_sticky_flag Firefox1/26/2016 Safari9/20/2016238
javascript.builtins.RegExp.sticky.prototype_accessor Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.RegExp.unicode πŸ“‹Firefox4/26/2016 Safari9/20/2016147
Edge: Case folding is implemented in version 13Node.js: Case folding is implemented in version 8.6.0
javascript.builtins.Set.@@species πŸ“‹Firefox9/22/2015 Safari9/20/2016364
javascript.builtins.String.localeCompare.locales_parameter Firefox4/29/2014 Safari9/20/2016875
Deno: Only the locale data for en-US is available.Node.js: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the function silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
javascript.builtins.String.localeCompare.options_parameter Firefox4/29/2014 Safari9/20/2016875
javascript.builtins.String.normalize πŸ“‹Firefox7/22/2014 Safari9/20/2016791
javascript.builtins.String.padEnd πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.String.padStart πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.Symbol.@@toPrimitive πŸ“‹Firefox1/26/2016 Safari9/20/2016238
javascript.builtins.Symbol.isConcatSpreadable πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.Symbol.iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
javascript.builtins.Symbol.match πŸ“‹Firefox8/11/2015 Safari9/20/2016406
javascript.builtins.Symbol.replace πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.Symbol.search πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.Symbol.species πŸ“‹Firefox9/22/2015 Safari9/20/2016364
javascript.builtins.Symbol.split πŸ“‹Firefox9/20/2016 Safari9/20/2016
javascript.builtins.Symbol.toPrimitive πŸ“‹Firefox1/26/2016 Safari9/20/2016238
javascript.builtins.TypedArray.@@iterator πŸ“‹Firefox2/24/2015 Safari9/20/2016574
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.TypedArray.@@species πŸ“‹Firefox8/2/2016 Safari9/20/201649
javascript.builtins.TypedArray.copyWithin πŸ“‹Firefox12/1/2014 Safari9/20/2016659
javascript.builtins.TypedArray.entries πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.every πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.fill πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.filter πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.find πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.findIndex πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.forEach πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.from πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.includes πŸ“‹Firefox12/15/2015 Safari9/20/2016280
javascript.builtins.TypedArray.indexOf πŸ“‹Firefox3/31/2015 Safari9/20/2016539
Firefox: Starting with Firefox 47, this method will no longer return -0. For example, new Uint8Array([0]).indexOf(0, -0) will now always return +0.Firefox for Android: Starting with Firefox for Android 47, this method will no longer return -0. For example, new Uint8Array([0]).indexOf(0, -0) will now always return +0.
javascript.builtins.TypedArray.join πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.keys πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.lastIndexOf πŸ“‹Firefox3/31/2015 Safari9/20/2016539
Firefox: Starting with Firefox 47, this method will no longer return -0. For example, new Uint8Array([0]).lastIndexOf(0, -0) will now always return +0.Firefox for Android: Starting with Firefox for Android 47, this method will no longer return -0. For example, new Uint8Array([0]).lastIndexOf(0, -0) will now always return +0.
javascript.builtins.TypedArray.map πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.of πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.reduce πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.reduceRight πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.reverse πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.slice πŸ“‹Firefox5/12/2015 Safari9/20/2016497
javascript.builtins.TypedArray.some πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.builtins.TypedArray.sort πŸ“‹Firefox4/26/2016 Safari9/20/2016147
javascript.builtins.TypedArray.values πŸ“‹Firefox3/31/2015 Safari9/20/2016539
javascript.functions.arrow_functions πŸ“‹Firefox6/25/2013 Safari9/20/20161183
Firefox: The initial implementation of arrow functions in Firefox made them automatically strict. This has been changed as of Firefox 24. The use of 'use strict'; is now required.Firefox: Before Firefox 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.Firefox for Android: The initial implementation of arrow functions in Firefox for Android made them automatically strict. This has been changed as of Firefox for Android 24. The use of 'use strict'; is now required.Firefox for Android: Before Firefox for Android 39, a line terminator (\n) was incorrectly allowed after arrow function arguments. This has been fixed to conform to the ES2015 specification and code like () \n => {} will now throw a SyntaxError in this and later versions.
javascript.functions.block_level_functions Firefox4/26/2016 Safari9/20/2016147
javascript.functions.default_parameters πŸ“‹Firefox8/28/2012 Safari9/20/20161484
javascript.functions.default_parameters.destructured_parameter_with_default_value_assignment Firefox9/22/2015 Safari9/20/2016364
javascript.functions.default_parameters.parameters_without_defaults_after_default_parameters Firefox12/10/2013 Safari9/20/20161015
javascript.functions.rest_parameters πŸ“‹Firefox8/28/2012 Safari9/20/20161484
javascript.operators.destructuring.computed_property_names Firefox9/22/2015 Safari9/20/2016364
javascript.operators.generator_function πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.operators.yield πŸ“‹Firefox12/10/2013 Safari9/20/20161015
Firefox: Starting with Firefox 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox: Starting with Firefox 29, an IteratorResult object returned for completed generator function.Firefox for Android: Starting with Firefox for Android 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox for Android: Starting with Firefox for Android 29, an IteratorResult object returned for completed generator function.
javascript.operators.yield_star πŸ“‹Firefox2/4/2014 Safari9/20/2016959
Firefox: Starting with Firefox 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.Firefox for Android: Starting with Firefox for Android 33, the parsing of the yield expression has been updated to conform with the ES2015 specification.
javascript.regular_expressions.character_escape.unicode Firefox4/26/2016 Safari9/20/2016147
javascript.statements.generator_function πŸ“‹Firefox12/10/2013 Safari9/20/20161015
javascript.statements.generator_function.IteratorResult_object Firefox4/29/2014 Safari9/20/2016875
javascript.statements.generator_function.not_constructable_with_new Firefox12/15/2015 Safari9/20/2016280
javascript.statements.let πŸ“‹Firefox1/26/2016 Safari9/20/2016238
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Edge: In Edge 12 and 13, let within a for loop initializer does not create a separate variable for each loop iteration as defined by ES2015. Instead, it behaves as though the loop were wrapped in a scoping block with the let immediately before the loop.Firefox: Before Firefox 44, let is only available to code blocks in HTML wrapped in a <script type="application/javascript;version=1.7"> block (or higher version) and has different semantics (e.g. no temporal dead zone).Firefox: Before Firefox 46, a TypeError is thrown on redeclaration instead of a SyntaxError.Firefox: Firefox 54 adds support of let in workers.Firefox for Android: Before Firefox for Android 44, let is only available to code blocks in HTML wrapped in a <script type="application/javascript;version=1.7"> block (or higher version) and has different semantics (e.g. no temporal dead zone).Firefox for Android: Before Firefox for Android 46, a TypeError is thrown on redeclaration instead of a SyntaxError.Firefox for Android: Firefox for Android 54 adds support of let in workers.Internet Explorer: In Internet Explorer, let within a for loop initializer does not create a separate variable for each loop iteration as defined by ES2015. Instead, it behaves as though the loop were wrapped in a scoping block with the let immediately before the loop.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.

2016/8

API First Browser Date Last Browser Date Days Notes
api.CSSKeyframeRule πŸ“‹Safari9/30/2015 Firefox8/2/2016307
api.CSSKeyframesRule πŸ“‹Safari3/21/2016 Firefox8/2/2016134
api.CanvasRenderingContext2D.ellipse πŸ“‹Safari9/30/2015 Firefox8/2/2016307
api.Document.scrollingElement πŸ“‹Safari9/30/2015 Firefox8/2/2016307
api.Element.insertAdjacentElement πŸ“‹Safari10/26/2007 Firefox8/2/20163203
Edge: Only supported for HTMLElement, not all Element objects, such as SVGElement.Internet Explorer: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.Element.insertAdjacentText πŸ“‹Safari6/8/2009 Firefox8/2/20162612
Edge: Only supported for HTMLElement, not all Element objects, such as SVGElement.Internet Explorer: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.Node.isSameNode πŸ“‹Safari10/26/2007 Firefox8/2/20163203
api.Path2D.ellipse πŸ“‹Safari9/30/2015 Firefox8/2/2016307
css.types.calc.number_values Safari7/25/2012 Firefox8/2/20161469
javascript.builtins.Symbol.unscopables πŸ“‹Safari9/30/2015 Firefox8/2/2016307

2016/6

API First Browser Date Last Browser Date Days Notes
api.ANGLE_instanced_arrays πŸ“‹Safari10/16/2014 Firefox6/7/2016600
Chrome: Available only on macOS.Opera: Available only on macOS.
api.ANGLE_instanced_arrays.drawArraysInstancedANGLE πŸ“‹Safari10/16/2014 Firefox6/7/2016600
api.ANGLE_instanced_arrays.drawElementsInstancedANGLE πŸ“‹Safari10/16/2014 Firefox6/7/2016600
api.ANGLE_instanced_arrays.vertexAttribDivisorANGLE πŸ“‹Safari10/16/2014 Firefox6/7/2016600
api.EXT_blend_minmax πŸ“‹Safari9/30/2015 Firefox6/7/2016251
Firefox: Not supported on Windows.
api.EXT_frag_depth πŸ“‹Safari9/30/2015 Firefox6/7/2016251
api.EXT_shader_texture_lod πŸ“‹Safari10/16/2014 Firefox6/7/2016600
api.EXT_texture_filter_anisotropic πŸ“‹Safari3/21/2016 Firefox6/7/201678
css.selectors.attribute.case_insensitive_modifier Safari9/30/2015 Firefox6/7/2016251

2016/4

API First Browser Date Last Browser Date Days Notes
api.FileReader.worker_support Safari7/25/2012 Firefox4/26/20161371
css.properties.text-emphasis πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.circle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.currentColor πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.dot πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.double-circle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.filled πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.none πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.open πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.sesame πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.transparent πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis.triangle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-color πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-color.currentColor πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-color.transparent πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-position πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-position.left Safari10/16/2014 Firefox4/26/2016558
css.properties.text-emphasis-position.right Safari10/16/2014 Firefox4/26/2016558
css.properties.text-emphasis-style πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.circle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.dot πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.double-circle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.filled πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.none πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.open πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.sesame πŸ“‹Safari10/22/2013 Firefox4/26/2016917
css.properties.text-emphasis-style.triangle πŸ“‹Safari10/22/2013 Firefox4/26/2016917
javascript.functions.arguments.@@iterator πŸ“‹Safari9/30/2015 Firefox4/26/2016209

2016/3

API First Browser Date Last Browser Date Days Notes
api.CSSKeyframesRule.appendRule πŸ“‹Firefox5/14/2013 Safari3/21/20161042
api.DOMParser.parseFromString.html Firefox4/24/2012 Safari3/21/20161427
api.HTMLImageElement.currentSrc πŸ“‹Firefox5/12/2015 Safari3/21/2016314
api.HTMLImageElement.sizes πŸ“‹Firefox5/12/2015 Safari3/21/2016314
api.HTMLPictureElement πŸ“‹Firefox5/12/2015 Safari3/21/2016314
api.Window.beforeunload_event.generic_string_displayed Firefox1/26/2016 Safari3/21/201655
css.at-rules.font-feature-values πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.annotation Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.character-variant Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.historical-forms Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.ornaments Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.styleset Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.stylistic Firefox12/1/2014 Safari3/21/2016476
css.at-rules.font-feature-values.swash Firefox12/1/2014 Safari3/21/2016476
css.properties.all πŸ“‹Firefox2/4/2014 Safari3/21/2016776
css.properties.border-image-repeat.round πŸ“‹Firefox8/28/2012 Safari3/21/20161301
css.properties.clip-path πŸ“‹Firefox6/30/2009 Safari3/21/20162456
Edge: Only supports clip paths defined by url().Internet Explorer: Only supports clip paths defined by url().
css.properties.custom-property πŸ“‹Firefox7/22/2014 Safari3/21/2016608
css.properties.filter πŸ“‹Firefox1/13/2015 Safari3/21/2016433
Internet Explorer: Internet Explorer 4 to 9 implemented a non-standard filter property. The syntax was completely different from this one and is not documented here.
css.properties.font-feature-settings πŸ“‹Firefox12/1/2014 Safari3/21/2016476
Firefox: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox: From Firefox 129 the -webkit-font-feature-settings alias has been added to support sites that are still supporting the vendor prefix.Firefox: From Firefox 4 to Firefox 14 (inclusive), Firefox supported an older, slightly different syntax. See OpenType Font Feature support in Firefox 4.Firefox for Android: The ISO/IEC CD 14496-22 3rd edition suggests using the ssty feature to provide glyph variants more suitable for use in scripts (for example primes used as superscripts). Starting with Firefox for Android 29, this is done automatically by the MathML rendering engine. The ISO/IEC CD 14496-22 3rd edition also suggests applying the dtls feature to letters when placing mathematical accents to get dotless forms (for example dotless i, j with a hat). Starting with Firefox for Android 35, this is done automatically by the MathML rendering engine. You can override the default values determined by the MathML rendering engine with CSS.Firefox for Android: From Firefox for Android 129 the -webkit-font-feature-settings alias has been added to support sites that are still supporting the vendor prefix.Firefox for Android: From Firefox for Android 4 to Firefox for Android 14 (inclusive), Firefox for Android supported an older, slightly different syntax. See OpenType Font Feature support in Firefox for Android 4.
css.properties.font-feature-settings.normal πŸ“‹Firefox8/28/2012 Safari3/21/20161301
css.properties.font-variant.css_fonts_shorthand Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant.historical-forms πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant.sub πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant.super πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-alternates πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-alternates.historical-forms πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-alternates.normal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.all-petite-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.all-small-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.normal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.petite-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.small-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.titling-caps πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-caps.unicase πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.full-width πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.jis04 πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.jis78 πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.jis83 πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.jis90 πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.normal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.proportional-width πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.ruby πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.simplified πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-east-asian.traditional πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-ligatures πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.diagonal-fractions πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.lining-nums πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.normal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.oldstyle-nums πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.ordinal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.proportional-nums πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.slashed-zero πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.stacked-fractions πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-numeric.tabular-nums πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-position πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-position.normal πŸ“‹Firefox12/1/2014 Safari3/21/2016476
css.properties.font-variant-position.sub πŸ“‹Firefox12/1/2014 Safari3/21/2016476
Chrome: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).Chrome Android: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).Edge: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).Opera: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).Opera Android: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).Safari: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 151471).Safari on iOS: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 151471).Samsung Internet: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).WebView Android: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 352218916).WebView on iOS: If the font does not have subscript glyphs, then substitute characters are not synthesized (see bug 151471).
css.properties.font-variant-position.super πŸ“‹Firefox12/1/2014 Safari3/21/2016476
Chrome: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).Chrome Android: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).Edge: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).Opera: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).Opera Android: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).Safari: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 151471).Safari on iOS: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 151471).Samsung Internet: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).WebView Android: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 352218916).WebView on iOS: If the font does not have superscript glyphs, then substitute characters are not synthesized (see bug 151471).
css.properties.hyphens.language_croatian Firefox11/8/2011 Safari3/21/20161595
css.properties.hyphens.language_finnish Firefox11/8/2011 Safari3/21/20161595
css.properties.hyphens.language_hungarian Firefox12/20/2011 Safari3/21/20161553
css.properties.hyphens.language_polish Firefox7/22/2014 Safari3/21/2016608
css.properties.hyphens.language_portuguese Firefox11/8/2011 Safari3/21/20161595
css.properties.hyphens.language_ukrainian Firefox12/20/2011 Safari3/21/20161553
css.properties.will-change πŸ“‹Firefox2/24/2015 Safari3/21/2016391
css.properties.will-change.auto πŸ“‹Firefox2/24/2015 Safari3/21/2016391
css.properties.will-change.contents πŸ“‹Firefox2/24/2015 Safari3/21/2016391
css.properties.will-change.scroll-position πŸ“‹Firefox2/24/2015 Safari3/21/2016391
css.types.global_keywords.unset πŸ“‹Firefox2/4/2014 Safari3/21/2016776
css.types.var πŸ“‹Firefox7/22/2014 Safari3/21/2016608
html.elements.img.sizes πŸ“‹Firefox5/12/2015 Safari3/21/2016314
html.elements.picture πŸ“‹Firefox5/12/2015 Safari3/21/2016314
html.elements.source.sizes πŸ“‹Firefox5/12/2015 Safari3/21/2016314
Chrome: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Chrome Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Samsung Internet: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).WebView Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).
html.elements.source.srcset πŸ“‹Firefox5/12/2015 Safari3/21/2016314
Chrome: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Chrome Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Opera Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).Samsung Internet: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).WebView Android: Supports a subset of the syntax for resolution switching (using the x descriptor), but not the full syntax that can be used with sizes (using the w descriptor).
http.mixed-content πŸ“‹Firefox8/6/2013 Safari3/21/2016958
http.mixed-content.blockable_mixed_content πŸ“‹Firefox8/6/2013 Safari3/21/2016958
Chrome: From version 79 blocks iframes, scripts, and stylesheets.Chrome Android: From version 79 blocks iframes, scripts, and stylesheets.Edge: From version 79 blocks iframes, scripts, and stylesheets.Quest Browser: From version 8.0 blocks iframes, scripts, and stylesheets.Opera: From version 66 blocks iframes, scripts, and stylesheets.Opera Android: From version 57 blocks iframes, scripts, and stylesheets.Samsung Internet: From version 12.0 blocks iframes, scripts, and stylesheets.WebView Android: From version 79 blocks iframes, scripts, and stylesheets.
javascript.functions.get.computed_property_names Firefox12/1/2014 Safari3/21/2016476
javascript.functions.method_definitions.generator_methods_not_constructable Firefox12/15/2015 Safari3/21/201697
javascript.functions.set.computed_property_names Firefox12/1/2014 Safari3/21/2016476
javascript.operators.destructuring.rest_in_arrays Firefox9/22/2015 Safari3/21/2016181
api.HTMLElement.innerText πŸ“‹Safari6/23/2003 Firefox3/8/20164642
api.HTMLScriptElement.innerText πŸ“‹Safari10/26/2007 Firefox3/8/20163056
api.Window.storage_event πŸ“‹Safari6/8/2009 Firefox3/8/20162465
css.properties.align-content.flex_context.baseline Safari9/30/2015 Firefox3/8/2016160
css.properties.place-content πŸ“‹Safari9/30/2015 Firefox3/8/2016160
css.properties.place-content.flex_context Safari9/30/2015 Firefox3/8/2016160
Firefox: Starting with version 60, you can only specify a single value if it is valid for both align-content and justify-content.Firefox for Android: Starting with version 60, you can only specify a single value if it is valid for both align-content and justify-content.
css.properties.word-spacing.percentages Safari10/22/2013 Firefox3/8/2016868
http.headers.Content-Security-Policy.meta-element-support Safari10/22/2013 Firefox3/8/2016868
javascript.classes πŸ“‹Safari9/30/2015 Firefox3/8/2016160
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.constructor πŸ“‹Safari9/30/2015 Firefox3/8/2016160
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.extends πŸ“‹Safari9/30/2015 Firefox3/8/2016160
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.classes.static πŸ“‹Safari9/30/2015 Firefox3/8/2016160
Chrome: Strict mode is required.Chrome Android: Strict mode is required.Opera: Strict mode is required.Opera Android: Strict mode is required.Samsung Internet: Strict mode is required.WebView Android: Strict mode is required.
javascript.operators.class πŸ“‹Safari10/22/2013 Firefox3/8/2016868
javascript.operators.super πŸ“‹Safari10/22/2013 Firefox3/8/2016868

2016/1

API First Browser Date Last Browser Date Days Notes
api.Document.createAttribute πŸ“‹Safari6/23/2003 Firefox1/26/20164600
Firefox: The parameter was not converted to its lowercase variant.Firefox for Android: The parameter was not converted to its lowercase variant.
css.properties.text-orientation.sideways πŸ“‹Safari10/22/2013 Firefox1/26/2016826

2015/12

API First Browser Date Last Browser Date Days Notes
css.properties.transform-origin.svg_elements Safari7/25/2012 Firefox12/15/20151238
Firefox: Keywords and percentages refer to the canvas instead of the object itself. See bug 1209061.Firefox for Android: Keywords and percentages refer to the canvas instead of the object itself. See bug 1209061.Safari: Only supported for transformations applied using the CSS transform property (e.g. .className { transform: rotate(45deg); transform-origin: center; }). It has no effect on transformations applied using the transform SVG attribute (e.g. <rect style="transform-origin: center;" transform="rotate(45)" />).Safari on iOS: Only supported for transformations applied using the CSS transform property (e.g. .className { transform: rotate(45deg); transform-origin: center; }). It has no effect on transformations applied using the transform SVG attribute (e.g. <rect style="transform-origin: center;" transform="rotate(45)" />).WebView on iOS: Only supported for transformations applied using the CSS transform property (e.g. .className { transform: rotate(45deg); transform-origin: center; }). It has no effect on transformations applied using the transform SVG attribute (e.g. <rect style="transform-origin: center;" transform="rotate(45)" />).
css.properties.writing-mode.horizontal-tb Safari9/30/2015 Firefox12/15/201576
css.properties.writing-mode.vertical-lr Safari9/30/2015 Firefox12/15/201576
css.properties.writing-mode.vertical-rl Safari9/30/2015 Firefox12/15/201576
javascript.builtins.Array.includes πŸ“‹Safari9/30/2015 Firefox12/15/201576

2015/11

API First Browser Date Last Browser Date Days Notes
api.HTMLVideoElement.getVideoPlaybackQuality πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.
api.MediaSource πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.WebView on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.MediaSource πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.activeSourceBuffers πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.addSourceBuffer πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.duration πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.endOfStream πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.isTypeSupported_static πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Chrome: codecs string can contain any subset of optional parameters (should be all or none).Chrome: Errors if codecs string contains unexpected characters (should evaluate string up to character).Chrome Android: codecs string can contain any subset of optional parameters (should be all or none).Chrome Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Edge: codecs string can contain any subset of optional parameters (should be all or none).Edge: Errors if codecs string contains unexpected characters (should evaluate string up to character).Firefox: Before Firefox 101, isTypeSupported() ignored codecs parameter options for av01 codecs (treating them as av1).Firefox for Android: Before Firefox 101, isTypeSupported() ignored codecs parameter options for av01 codecs (treating them as av1).Internet Explorer: Only works on Windows 8+.Quest Browser: codecs string can contain any subset of optional parameters (should be all or none).Quest Browser: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera: codecs string can contain any subset of optional parameters (should be all or none).Opera: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera Android: codecs string can contain any subset of optional parameters (should be all or none).Opera Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.Samsung Internet: codecs string can contain any subset of optional parameters (should be all or none).Samsung Internet: Errors if codecs string contains unexpected characters (should evaluate string up to character).WebView Android: codecs string can contain any subset of optional parameters (should be all or none).WebView Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).
api.MediaSource.readyState πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.removeSourceBuffer πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.sourceBuffers πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.abort πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendBuffer πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendWindowEnd πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendWindowStart πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.buffered πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.mode πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.remove πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.timestampOffset πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.updating πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBufferList πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.WebView on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBufferList.length πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.WebView on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.VideoPlaybackQuality πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.creationTime πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.droppedVideoFrames πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.totalVideoFrames πŸ“‹Safari10/16/2014 Firefox11/3/2015383
Internet Explorer: Only works on Windows 8+.

2015/9

API First Browser Date Last Browser Date Days Notes
api.AnimationEvent πŸ“‹Firefox6/21/2011 Safari9/30/20151562
api.AnimationEvent.AnimationEvent πŸ“‹Firefox8/6/2013 Safari9/30/2015785
api.AnimationEvent.animationName πŸ“‹Firefox6/21/2011 Safari9/30/20151562
api.AnimationEvent.elapsedTime πŸ“‹Firefox6/21/2011 Safari9/30/20151562
api.AudioContext.close πŸ“‹Firefox8/11/2015 Safari9/30/201550
api.AudioContext.resume πŸ“‹Firefox8/11/2015 Safari9/30/201550
api.AudioContext.suspend πŸ“‹Firefox8/11/2015 Safari9/30/201550
api.BaseAudioContext.state πŸ“‹Firefox8/11/2015 Safari9/30/201550
api.BaseAudioContext.statechange_event πŸ“‹Firefox8/11/2015 Safari9/30/201550
api.CSS πŸ“‹Firefox6/25/2013 Safari9/30/2015827
api.CSS.supports_static πŸ“‹Firefox6/25/2013 Safari9/30/2015827
api.CSSSupportsRule πŸ“‹Firefox6/25/2013 Safari9/30/2015827
api.CharacterData.nextElementSibling πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.CharacterData.previousElementSibling πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.Document.childElementCount πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.Document.children πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.Document.contentType πŸ“‹Firefox11/9/2004 Safari9/30/20153977
api.Document.firstElementChild πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.Document.lastElementChild πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.DocumentFragment.childElementCount πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.DocumentFragment.children πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.DocumentFragment.firstElementChild πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.DocumentFragment.getElementById πŸ“‹Firefox3/18/2014 Safari9/30/2015561
api.DocumentFragment.lastElementChild πŸ“‹Firefox10/29/2013 Safari9/30/2015701
api.HTMLAnchorElement.relList πŸ“‹Firefox6/10/2014 Safari9/30/2015477
api.HTMLAreaElement.rel πŸ“‹Firefox6/10/2014 Safari9/30/2015477
api.HTMLAreaElement.relList πŸ“‹Firefox6/10/2014 Safari9/30/2015477
api.HTMLLinkElement.relList πŸ“‹Firefox6/10/2014 Safari9/30/2015477
api.HTMLSelectElement.add.index_before_parameter Firefox11/8/2011 Safari9/30/20151422
api.MouseEvent.movementX πŸ“‹Firefox9/22/2015 Safari9/30/20158
api.MouseEvent.movementY πŸ“‹Firefox9/22/2015 Safari9/30/20158
api.OfflineAudioContext.resume πŸ“‹Firefox8/11/2015 Safari9/30/201550
Firefox: The method exists but always rejects with NotSupportedError. See bug 1265406.Firefox for Android: The method exists but always rejects with NotSupportedError. See bug 1265406.
api.Path2D.addPath πŸ“‹Firefox12/1/2014 Safari9/30/2015303
api.WEBGL_draw_buffers πŸ“‹Firefox3/18/2014 Safari9/30/2015561
api.WEBGL_draw_buffers.drawBuffersWEBGL πŸ“‹Firefox3/18/2014 Safari9/30/2015561
css.at-rules.keyframes πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.at-rules.supports πŸ“‹Firefox6/25/2013 Safari9/30/2015827
css.properties.align-content πŸ“‹Firefox3/18/2014 Safari9/30/2015561
css.properties.align-content.flex_context πŸ“‹Firefox3/18/2014 Safari9/30/2015561
css.properties.align-content.normal πŸ“‹Firefox3/18/2014 Safari9/30/2015561
css.properties.align-items πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.align-self πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.animation πŸ“‹Firefox10/9/2012 Safari9/30/20151086
WebView Android: The animation-fill-mode property is not supported in Android browsers below 2.3.
css.properties.animation-delay πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Firefox: Before Firefox 57, Firefox does not repaint elements outside the viewport that are animated into the viewport with a delay. This bug affects only some platforms, such as Windows.
css.properties.animation-direction πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.animation-duration πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Internet Explorer: Once the element has loaded, changing the value of this property has no effect.
css.properties.animation-fill-mode πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.animation-iteration-count πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.animation-name πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.animation-play-state πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.animation-timing-function πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.color-interpolation-filters.linearRGB πŸ“‹Firefox6/25/2013 Safari9/30/2015827
css.properties.color-interpolation-filters.sRGB πŸ“‹Firefox6/25/2013 Safari9/30/2015827
css.properties.counter-increment.list-item πŸ“‹Firefox11/9/2004 Safari9/30/20153977
css.properties.counter-reset.list-item πŸ“‹Firefox11/9/2004 Safari9/30/20153977
Chrome: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.Chrome Android: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.Quest Browser: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.Opera: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.Opera Android: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.Safari: Overriding the initial value of the implicit list-item counter results in incorrect values for the counter() function used to generate content, as it is not fully implemented; see bug 260436.Safari on iOS: Overriding the initial value of the implicit list-item counter results in incorrect values for the counter() function used to generate content, as it is not fully implemented; see bug 260436.Samsung Internet: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.WebView Android: Overriding the initial value of the implicit list-item counter has no effect when the default marker string for list items (::marker) is generated; see bug 338233131.WebView on iOS: Overriding the initial value of the implicit list-item counter results in incorrect values for the counter() function used to generate content, as it is not fully implemented; see bug 260436.
css.properties.cursor.zoom-in πŸ“‹Firefox9/17/2013 Safari9/30/2015743
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.zoom-out πŸ“‹Firefox9/17/2013 Safari9/30/2015743
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.display.flex Firefox4/2/2013 Safari9/30/2015911
Firefox: Firefox 28 added multi-line flexbox support.Firefox for Android: Firefox for Android 28 added multi-line flexbox support.Internet Explorer: IE incorrectly positions inline block content inside flex containers. See the discussion on Microsoft Answers.Internet Explorer: IE incorrectly positions inline block content inside flex containers. See the discussion on Microsoft Answers.
css.properties.display.inline-flex Firefox4/2/2013 Safari9/30/2015911
Firefox: Firefox 28 added multi-line flexbox support.Firefox for Android: Firefox for Android 28 added multi-line flexbox support.
css.properties.flex πŸ“‹Firefox6/25/2013 Safari9/30/2015827
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox: Before Firefox 32, Firefox wasn't able to animate values starting or stopping at 0.Firefox: Until Firefox 61, flex items that are sized according to their content are sized using fit-content, not max-content.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.Firefox for Android: Before Firefox for Android 32, Firefox for Android wasn't able to animate values starting or stopping at 0.Firefox for Android: Until Firefox for Android 61, flex items that are sized according to their content are sized using fit-content, not max-content.Internet Explorer: Internet Explorer 11 ignores uses of calc() in the flex-basis part of the flex syntax. This can be worked around by using the longhand properties instead of the shorthand. See Flexbug #8 for more info.Internet Explorer: Internet Explorer 11 considers a unitless value in the flex-basis part to be syntactically invalid (and will thus be ignored). A workaround is to always include a unit in the flex-basis part of the flex shorthand value. See Flexbug #4 for more info.Internet Explorer: Internet Explorer 10 and 11 ignore uses of calc() in the flex-basis part of the flex syntax. This can be worked around by using the longhand properties instead of the shorthand. See Flexbug #8 for more info.Internet Explorer: Internet Explorer 10 and 11 consider a unitless value in the flex-basis part to be syntactically invalid (and will thus be ignored). A workaround is to always include a unit in the flex-basis part of the flex shorthand value. See Flexbug #4 for more info.
css.properties.flex-basis πŸ“‹Firefox6/25/2013 Safari9/30/2015827
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.Internet Explorer: When a non-auto flex-basis is specified, Internet Explorer 10 and 11 always uses a content-box box model to calculate the size of a flex item, even if box-sizing: border-box is applied to the element. See Flexbug #7 for more info.
css.properties.flex-basis.auto Firefox6/25/2013 Safari9/30/2015827
css.properties.flex-direction πŸ“‹Firefox6/25/2013 Safari9/30/2015827
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.
css.properties.flex-flow πŸ“‹Firefox3/18/2014 Safari9/30/2015561
css.properties.flex-grow πŸ“‹Firefox4/2/2013 Safari9/30/2015911
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.
css.properties.flex-shrink πŸ“‹Firefox4/2/2013 Safari9/30/2015911
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox: Before Firefox 32, Firefox wasn't able to animate values starting or stopping at 0.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.Firefox for Android: Before Firefox for Android 32, Firefox for Android wasn't able to animate values starting or stopping at 0.Internet Explorer: Internet Explorer 10 uses 0 instead of 1 as the initial value for the flex-shrink property. A workaround is to always set an explicit value for flex-shrink. See Flexbug #6 for more info.
css.properties.flex-wrap πŸ“‹Firefox3/18/2014 Safari9/30/2015561
Internet Explorer: Partial support due to large number of bugs present. See Flexbugs.
css.properties.font-kerning πŸ“‹Firefox9/2/2014 Safari9/30/2015393
css.properties.font-kerning.auto πŸ“‹Firefox9/2/2014 Safari9/30/2015393
css.properties.font-kerning.none πŸ“‹Firefox9/2/2014 Safari9/30/2015393
css.properties.font-kerning.normal πŸ“‹Firefox9/2/2014 Safari9/30/2015393
css.properties.font-synthesis πŸ“‹Firefox12/1/2014 Safari9/30/2015303
css.properties.font-synthesis.none πŸ“‹Firefox12/1/2014 Safari9/30/2015303
css.properties.font-variant.none πŸ“‹Firefox12/1/2014 Safari9/30/2015303
css.properties.justify-content πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items.center Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items.flex_context πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items.left Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items.legacy πŸ“‹Firefox4/2/2013 Safari9/30/2015911
css.properties.justify-items.right Firefox4/2/2013 Safari9/30/2015911
css.properties.order πŸ“‹Firefox4/2/2013 Safari9/30/2015911
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.
css.properties.perspective πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Firefox: From version 147, Firefox supports -webkit-perspective with unitless values for increased compatibility.Firefox for Android: From version 147, Firefox for Android supports -webkit-perspective with unitless values for increased compatibility.Safari on iOS: In iOS 13, the perspective property did not function properly. The issues were fixed in iOS 14.WebView on iOS: In iOS 13, the perspective property did not function properly. The issues were fixed in iOS 14.
css.properties.perspective-origin πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.quotes πŸ“‹Firefox11/29/2005 Safari9/30/20153592
css.properties.quotes.none πŸ“‹Firefox11/29/2005 Safari9/30/20153592
css.properties.transform πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Internet Explorer: Internet Explorer does not support the global values initial and unset.Internet Explorer: Internet Explorer 5.5 or later supports a proprietary Matrix Filter which can be used to achieve a similar effect.WebView Android: Android 2.3 has a bug where input forms will "jump" when typing, if any container element has a -webkit-transform.
css.properties.transform-origin πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.transform-style πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Safari: Before Safari 17, ::before and ::after pseudo elements were not included in the 3D rendering context (see bug 256430).
css.properties.transition πŸ“‹Firefox10/9/2012 Safari9/30/20151086
Firefox: Before Firefox 57, transitions do not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (see bug 726550).Firefox: Before Firefox 57, cancelling a filling animation (for example, with animation-fill-mode: forwards set) can trigger a transition set on the same element, although only once (see bug 1192592 and these test cases for more information).Firefox: Before Firefox 57, the background-position property can't be transitioned between two values containing different numbers of <position> values, for example background-position: 10px 10px; and background-position: 20px 20px, 30px 30px; (see bug 1390446).Firefox for Android: Before Firefox for Android 57, transitions do not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (see bug 726550).Firefox for Android: Before Firefox for Android 57, cancelling a filling animation (for example, with animation-fill-mode: forwards set) can trigger a transition set on the same element, although only once (see bug 1192592 and these test cases for more information).Firefox for Android: Before Firefox for Android 57, the background-position property can't be transitioned between two values containing different numbers of <position> values, for example background-position: 10px 10px; and background-position: 20px 20px, 30px 30px; (see bug 1390446).
css.properties.transition-delay πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.transition-duration πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.transition-property πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.transition-timing-function πŸ“‹Firefox10/9/2012 Safari9/30/20151086
css.properties.word-break.keep-all πŸ“‹Firefox8/28/2012 Safari9/30/20151128
css.selectors.invalid.form Firefox6/5/2012 Safari9/30/20151212
css.selectors.valid.form Firefox6/5/2012 Safari9/30/20151212
css.types.color.named-color.rebeccapurple Firefox10/14/2014 Safari9/30/2015351
javascript.builtins.Array.copyWithin πŸ“‹Firefox9/2/2014 Safari9/30/2015393
javascript.builtins.Array.from πŸ“‹Firefox9/2/2014 Safari9/30/2015393
javascript.builtins.Array.of πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.builtins.Map.Map.iterable_allowed Firefox6/5/2012 Safari9/30/20151212
javascript.builtins.Map.Map.null_allowed Firefox3/31/2015 Safari9/30/2015183
javascript.builtins.Map.key_equality_for_zeros Firefox4/29/2014 Safari9/30/2015519
javascript.builtins.Math.sign πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.builtins.Number.EPSILON πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.builtins.Number.MAX_SAFE_INTEGER πŸ“‹Firefox7/22/2014 Safari9/30/2015435
javascript.builtins.Number.MIN_SAFE_INTEGER πŸ“‹Firefox7/22/2014 Safari9/30/2015435
javascript.builtins.Number.isFinite πŸ“‹Firefox10/9/2012 Safari9/30/20151086
javascript.builtins.Number.isInteger πŸ“‹Firefox10/9/2012 Safari9/30/20151086
javascript.builtins.Number.isNaN πŸ“‹Firefox8/28/2012 Safari9/30/20151128
javascript.builtins.Number.isSafeInteger πŸ“‹Firefox9/2/2014 Safari9/30/2015393
javascript.builtins.Number.parseFloat πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.builtins.Number.parseInt πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.builtins.Object.assign πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.Object.getOwnPropertySymbols πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.Object.is πŸ“‹Firefox6/25/2013 Safari9/30/2015827
javascript.builtins.Object.preventExtensions.ES2015_behavior Firefox1/13/2015 Safari9/30/2015260
javascript.builtins.Object.setPrototypeOf πŸ“‹Firefox7/22/2014 Safari9/30/2015435
javascript.builtins.RegExp.flags πŸ“‹Firefox3/31/2015 Safari9/30/2015183
javascript.builtins.Set.@@iterator πŸ“‹Firefox2/24/2015 Safari9/30/2015218
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.Set.Set.iterable_allowed Firefox6/5/2012 Safari9/30/20151212
javascript.builtins.Set.Set.null_allowed Firefox3/31/2015 Safari9/30/2015183
javascript.builtins.Set.key_equality_for_zeros Firefox4/29/2014 Safari9/30/2015519
javascript.builtins.String.@@iterator πŸ“‹Firefox2/24/2015 Safari9/30/2015218
Firefox: A placeholder property named @@iterator is used.Firefox: A placeholder property named iterator is used.Firefox for Android: A placeholder property named @@iterator is used.Firefox for Android: A placeholder property named iterator is used.
javascript.builtins.String.codePointAt πŸ“‹Firefox4/29/2014 Safari9/30/2015519
javascript.builtins.String.endsWith πŸ“‹Firefox11/20/2012 Safari9/30/20151044
javascript.builtins.String.fromCodePoint πŸ“‹Firefox4/29/2014 Safari9/30/2015519
javascript.builtins.String.includes πŸ“‹Firefox8/11/2015 Safari9/30/201550
javascript.builtins.String.raw πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.String.repeat πŸ“‹Firefox9/17/2013 Safari9/30/2015743
javascript.builtins.String.startsWith πŸ“‹Firefox11/20/2012 Safari9/30/20151044
javascript.builtins.Symbol πŸ“‹Firefox2/24/2015 Safari9/30/2015218
Edge: Edge 12 included Symbol properties in JSON.stringify() output.
javascript.builtins.Symbol.Symbol πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.Symbol.for πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.Symbol.keyFor πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.Symbol.toString πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.Symbol.valueOf πŸ“‹Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.WeakMap.WeakMap.iterable_allowed Firefox2/24/2015 Safari9/30/2015218
javascript.builtins.WeakSet πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.WeakSet.WeakSet πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.WeakSet.WeakSet.iterable_allowed Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.WeakSet.WeakSet.null_allowed Firefox3/31/2015 Safari9/30/2015183
javascript.builtins.WeakSet.add πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.WeakSet.delete πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.builtins.WeakSet.has πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.functions.method_definitions πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.grammar.binary_numeric_literals πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.grammar.octal_numeric_literals πŸ“‹Firefox10/29/2013 Safari9/30/2015701
javascript.grammar.shorthand_object_literals Firefox10/14/2014 Safari9/30/2015351
javascript.grammar.template_literals πŸ“‹Firefox12/1/2014 Safari9/30/2015303
javascript.grammar.unicode_point_escapes πŸ“‹Firefox8/11/2015 Safari9/30/201550
javascript.operators.object_initializer.shorthand_method_names Firefox12/1/2014 Safari9/30/2015303
javascript.operators.object_initializer.shorthand_property_names Firefox10/14/2014 Safari9/30/2015351
api.MessageChannel πŸ“‹Safari6/7/2010 Firefox9/22/20151933
Node.js: Available as a part of the worker_threads module.
api.MessageChannel.MessageChannel πŸ“‹Safari6/7/2010 Firefox9/22/20151933
api.MessageChannel.port1 πŸ“‹Safari6/7/2010 Firefox9/22/20151933
api.MessageChannel.port2 πŸ“‹Safari6/7/2010 Firefox9/22/20151933
api.MessagePort πŸ“‹Safari6/7/2010 Firefox9/22/20151933
Node.js: Available as a part of the worker_threads module.Node.js: Available as a part of the worker_threads module.Node.js: Inherits from Node EventEmitter instead of DOM EventTarget.
api.MessagePort.close πŸ“‹Safari6/7/2010 Firefox9/22/20151933
api.MessagePort.message_event πŸ“‹Safari6/7/2010 Firefox9/22/20151933
Node.js: Supports the event, but only via Node EventEmitter.
api.MessagePort.postMessage πŸ“‹Safari6/7/2010 Firefox9/22/20151933
Deno: The message parameter does not support cloning Blob values.Deno: The message parameter does not support cloning Blob values.Deno: The transfer parameter does not accept ArrayBuffer items. Passing an ArrayBuffer results in an error being thrown.
api.MessagePort.start πŸ“‹Safari6/7/2010 Firefox9/22/20151933
api.MessagePort.worker_support Safari6/7/2010 Firefox9/22/20151933
css.properties.block-size.auto πŸ“‹Safari7/20/2011 Firefox9/22/20151525
css.properties.inline-size.auto πŸ“‹Safari7/20/2011 Firefox9/22/20151525
javascript.builtins.RegExp.source.prototype_accessor Safari4/15/2005 Firefox9/22/20153812
javascript.operators.destructuring πŸ“‹Safari10/16/2014 Firefox9/22/2015341
Firefox: Firefox provided a non-standard destructuring implementation from Firefox 2 to 40.Firefox for Android: Firefox for Android provided a non-standard destructuring implementation from Firefox for Android 4 to 40.

2015/8

API First Browser Date Last Browser Date Days Notes
javascript.builtins.String.unicode_code_point_escapes Safari6/23/2003 Firefox8/11/20154432

2015/7

API First Browser Date Last Browser Date Days Notes
api.MouseEvent.offsetX πŸ“‹Safari6/23/2003 Firefox7/2/20154392
api.MouseEvent.offsetY πŸ“‹Safari6/23/2003 Firefox7/2/20154392
api.console.clear_static πŸ“‹Safari10/22/2013 Firefox7/2/2015618
api.console.dirxml_static πŸ“‹Safari6/8/2009 Firefox7/2/20152215
Node.js: Does not use Logger to log data.

2015/5

API First Browser Date Last Browser Date Days Notes
api.HTMLImageElement.srcset πŸ“‹Safari10/16/2014 Firefox5/12/2015208
html.elements.img.srcset πŸ“‹Safari10/16/2014 Firefox5/12/2015208
html.elements.rb πŸ“‹Safari6/7/2010 Firefox5/12/20151800
Chrome: Blink has support for parsing the rb element, but not for rendering rb content as expected.Chrome Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.Edge: Blink has support for parsing the rb element, but not for rendering rb content as expected.Quest Browser: Blink has support for parsing the rb element, but not for rendering rb content as expected.Opera: Blink has support for parsing the rb element, but not for rendering rb content as expected.Opera Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.Safari: Safari has support for parsing the rb element, but not for rendering rb content as expected.Safari on iOS: Safari on iOS has support for parsing the rb element, but not for rendering rb content as expected.Samsung Internet: Blink has support for parsing the rb element, but not for rendering rb content as expected.WebView Android: Blink has support for parsing the rb element, but not for rendering rb content as expected.WebView on iOS: WebView on iOS has support for parsing the rb element, but not for rendering rb content as expected.
html.elements.rp πŸ“‹Safari6/7/2010 Firefox5/12/20151800
html.elements.rt πŸ“‹Safari6/7/2010 Firefox5/12/20151800
Chrome: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.Chrome Android: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.Quest Browser: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.Opera: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.Opera Android: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.Safari: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 265316.Safari on iOS: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 265316.Samsung Internet: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.WebView Android: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 347597919.WebView on iOS: Nested <rt> elements do not render correctly due to missing display: ruby-text styling. See bug 265316.
html.elements.ruby πŸ“‹Safari6/7/2010 Firefox5/12/20151800
javascript.builtins.RegExp.global.prototype_accessor Safari4/15/2005 Firefox5/12/20153679
javascript.builtins.RegExp.ignoreCase.prototype_accessor Safari4/15/2005 Firefox5/12/20153679
javascript.builtins.RegExp.multiline.prototype_accessor Safari4/15/2005 Firefox5/12/20153679
javascript.builtins.RegExp.source.empty_regex_string Safari6/7/2010 Firefox5/12/20151800
javascript.builtins.RegExp.source.escaping Safari7/25/2012 Firefox5/12/20151021
javascript.builtins.RegExp.toString.escaping Safari7/25/2012 Firefox5/12/20151021

2015/3

API First Browser Date Last Browser Date Days Notes
api.WebSocket.worker_support Safari6/7/2010 Firefox3/31/20151758
javascript.builtins.WeakMap.WeakMap.null_allowed Safari10/16/2014 Firefox3/31/2015166

2015/2

API First Browser Date Last Browser Date Days Notes
css.at-rules.font-face.unicode-range πŸ“‹Safari3/18/2008 Firefox2/24/20152534
css.properties.isolation πŸ“‹Safari10/16/2014 Firefox2/24/2015131
css.properties.isolation.auto πŸ“‹Safari10/16/2014 Firefox2/24/2015131
css.properties.isolation.isolate πŸ“‹Safari10/16/2014 Firefox2/24/2015131
css.properties.white-space.textarea_support Safari6/23/2003 Firefox2/24/20154264
css.types.gradient.linear-gradient.interpolation_hints Safari10/22/2013 Firefox2/24/2015490
css.types.gradient.radial-gradient.interpolation_hints Safari10/22/2013 Firefox2/24/2015490
css.types.gradient.repeating-linear-gradient.interpolation_hints Safari10/22/2013 Firefox2/24/2015490
css.types.gradient.repeating-radial-gradient.interpolation_hints Safari10/22/2013 Firefox2/24/2015490
javascript.statements.const πŸ“‹Safari7/20/2011 Firefox2/24/20151315
Firefox: Before Firefox 13, const is implemented, but re-assignment is not failing.Firefox: Before Firefox 46, a TypeError was thrown on redeclaration instead of a SyntaxError.Firefox for Android: Before Firefox for Android 14, const is implemented, but re-assignment is not failing.Firefox for Android: Before Firefox for Android 46, a TypeError was thrown on redeclaration instead of a SyntaxError.

2015/1

API First Browser Date Last Browser Date Days Notes
api.Element.closest πŸ“‹Safari7/25/2012 Firefox1/13/2015902
api.SVGFEFloodElement.height πŸ“‹Safari7/25/2012 Firefox1/13/2015902
api.SVGFEFloodElement.result πŸ“‹Safari7/25/2012 Firefox1/13/2015902
api.SVGFEFloodElement.width πŸ“‹Safari7/25/2012 Firefox1/13/2015902
api.SVGFEFloodElement.x πŸ“‹Safari7/25/2012 Firefox1/13/2015902
api.SVGFEFloodElement.y πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.blur πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.brightness πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.contrast πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.drop-shadow πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.grayscale πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.hue-rotate πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.invert πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.none πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.opacity πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.filter.saturate πŸ“‹Safari7/25/2012 Firefox1/13/2015902
Chrome: In Chrome 18 to 19, the saturate() function only takes integers instead of decimal or percentage values. From Chrome 20, this bug is fixed.
css.properties.filter.sepia πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.properties.mask-type πŸ“‹Safari10/22/2013 Firefox1/13/2015448
css.properties.mask-type.alpha πŸ“‹Safari10/22/2013 Firefox1/13/2015448
css.properties.mask-type.luminance πŸ“‹Safari10/22/2013 Firefox1/13/2015448
css.types.filter-function πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.blur πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.brightness πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.contrast πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.drop-shadow πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.grayscale πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.hue-rotate πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.invert πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.opacity πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.saturate πŸ“‹Safari7/25/2012 Firefox1/13/2015902
css.types.filter-function.sepia πŸ“‹Safari7/25/2012 Firefox1/13/2015902
html.elements.body.bottommargin Safari6/8/2009 Firefox1/13/20152045
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.leftmargin Safari6/8/2009 Firefox1/13/20152045
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.rightmargin Safari6/8/2009 Firefox1/13/20152045
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.
html.elements.body.topmargin Safari6/8/2009 Firefox1/13/20152045
Firefox: Before Firefox 35, it was supported in Quirks Mode only.Firefox for Android: Before Firefox for Android 35, it was supported in Quirks Mode only.

2014/12

API First Browser Date Last Browser Date Days Notes
api.CryptoKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Node.js: Available as a part of the crypto module.
api.CryptoKey.algorithm πŸ“‹Safari10/22/2013 Firefox12/1/2014405
api.CryptoKey.extractable πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: The only supported value for this property is true.
api.CryptoKey.type πŸ“‹Safari10/22/2013 Firefox12/1/2014405
api.CryptoKey.usages πŸ“‹Safari10/22/2013 Firefox12/1/2014405
api.Element.matches πŸ“‹Safari10/16/2014 Firefox12/1/201446
Firefox: Before Firefox 4, invalid selector strings caused false to be returned instead of throwing an exception.Firefox: See bug 1119718 for removal.Firefox for Android: See bug 1119718 for removal.
api.NamedNodeMap πŸ“‹Safari6/23/2003 Firefox12/1/20144179
api.SubtleCrypto.decrypt πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: AES-CTR, AES-GCM.Deno: Not supported: AES-CTR, AES-CBC, AES-GCM.Edge: Not supported: AES-CTR.Internet Explorer: Returns CryptoOperation instead of Promise
api.SubtleCrypto.digest πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Chrome: Before version 41, Chrome expected the algorithm parameter to be an object.Chrome Android: Before version 41, Chrome Android expected the algorithm parameter to be an object.Edge: Not supported: SHA-1.Internet Explorer: Returns CryptoOperation instead of PromiseOpera: Before version 28, Opera expected the algorithm parameter to be an object.Opera Android: Before version 28, Opera Android expected the algorithm parameter to be an object.Samsung Internet: Before version 4.0, Samsung Internet expected the algorithm parameter to be an object.WebView Android: Before version 41, WebView Android expected the algorithm parameter to be an object.
api.SubtleCrypto.encrypt πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: AES-CTR, AES-GCM.Deno: Not supported: AES-CTR, AES-CBC, AES-GCM.Edge: Not supported: AES-CTR.Internet Explorer: Returns CryptoOperation instead of Promise
api.SubtleCrypto.exportKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: ECDSA, ECDH.Deno: Not supported: ECDSA, ECDH, AES-CTR, AES-CBC, AES-GCM, AES-KW.Edge: Not supported: RSA-PSS, ECDSA, ECDH.Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of PromiseNode.js: Supports: NODE-DSANode.js: Supports: NODE-DHNode.js: Supports: NODE-SCRYPT
api.SubtleCrypto.generateKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: ECDSA P-521, ECDH P-521.Deno: Not supported: RSA-OAEP, ECDSA P-521, ECDH, AES-CTR, AES-CBC, AES-GCM, AES-KW.Edge: Not supported: RSA-PSS, ECDSA, ECDH.Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of PromiseNode.js: Supports: NODE-DSANode.js: Supports: NODE-DH
api.SubtleCrypto.importKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: ECDH P-521.Deno: Not supported: ECDH.Deno: Not supported: AES-CTR, AES-CBC, AES-GCM, AES-KW.Edge: Not supported: RSA-PSS, ECDSA, ECDH.Edge: Not supported: AES-CTR, HKDF, PBKDF2.Internet Explorer: Returns KeyOperation instead of PromiseNode.js: Supports: NODE-DSANode.js: Supports: NODE-DHNode.js: Supports: NODE-SCRYPT
api.SubtleCrypto.importKey.ECDH πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: P-384 supported. Not supported: P-256, P-521.
api.SubtleCrypto.importKey.ECDSA πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: P-384 supported. Not supported: P-256, P-521.
api.SubtleCrypto.sign πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Edge: Not supported: RSA-PSS, ECDSA.Internet Explorer: Returns CryptoOperation instead of PromiseNode.js: Supports: NODE-DSA
api.SubtleCrypto.unwrapKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of PromiseNode.js: Supports: NODE-DSANode.js: Supports: NODE-DH
api.SubtleCrypto.verify πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Deno: Not supported: ECDSA, HMAC.Edge: Not supported: RSA-PSS, ECDSA.Internet Explorer: Returns CryptoOperation instead of PromiseNode.js: Supports: NODE-DSA
api.SubtleCrypto.wrapKey πŸ“‹Safari10/22/2013 Firefox12/1/2014405
Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of Promise
api.console.table_static πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.common-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.contextual πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.discretionary-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.historical-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.no-common-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.no-contextual πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.no-discretionary-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.no-historical-ligatures πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.none πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.font-variant-ligatures.normal πŸ“‹Safari10/22/2013 Firefox12/1/2014405
css.properties.min-height.auto Safari10/22/2013 Firefox12/1/2014405
Firefox: Firefox 18 and later used auto as the initial value for min-height.Firefox for Android: Firefox for Android 18 and later used auto as the initial value for min-height.
css.properties.min-width.auto Safari10/22/2013 Firefox12/1/2014405
Chrome: Chrome uses auto as the initial value for min-width.Chrome Android: Chrome Android uses auto as the initial value for min-width.Edge: Edge uses auto as the initial value for min-width.Firefox: Firefox 18 and later (until the value was removed), used auto as the initial value for min-width.Firefox for Android: Firefox for Android 18 and later (until the value was removed), used auto as the initial value for min-width.Quest Browser: Quest Browser uses auto as the initial value for min-width.Opera: Opera uses auto as the initial value for min-width.Opera Android: Opera Android uses auto as the initial value for min-width.Samsung Internet: Samsung Internet uses auto as the initial value for min-width.WebView Android: WebView Android uses auto as the initial value for min-width.
javascript.operators.object_initializer.computed_property_names Safari10/16/2014 Firefox12/1/201446

2014/10

API First Browser Date Last Browser Date Days Notes
api.AudioTrack πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.AudioTrack.enabled πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.AudioTrack.id πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.AudioTrack.kind πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.AudioTrack.label πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.AudioTrack.language πŸ“‹Firefox10/14/2014 Safari10/16/20142
api.BaseAudioContext.createPeriodicWave πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.CanvasRenderingContext2D.drawFocusIfNeeded πŸ“‹Firefox9/2/2014 Safari10/16/201444
api.Comment.Comment πŸ“‹Firefox9/17/2013 Safari10/16/2014394
api.Document.Document πŸ“‹Firefox4/2/2013 Safari10/16/2014562
api.Document.currentScript πŸ“‹Firefox3/22/2011 Safari10/16/20141304
api.DocumentFragment.DocumentFragment πŸ“‹Firefox9/17/2013 Safari10/16/2014394
api.ErrorEvent.colno πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.File.name πŸ“‹Firefox1/21/2010 Safari10/16/20141729
api.HTMLCanvasElement.getContext.webgl_context Firefox9/17/2013 Safari10/16/2014394
api.HTMLMediaElement.fastSeek πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.HTMLTemplateElement πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.HTMLTemplateElement.content πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.IDBCursor πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBCursor.advance πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.continue πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.delete πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.direction πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.key πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.primaryKey πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.source πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursor.update πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBCursorWithValue πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBCursorWithValue.value πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBDatabase.abort_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
Internet Explorer: Unknown limitations
api.IDBDatabase.close πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.createObjectStore πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.deleteObjectStore πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.name πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.objectStoreNames πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.transaction πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.version πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBDatabase.versionchange_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBFactory πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBFactory.cmp πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBFactory.deleteDatabase πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBIndex.count πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.get πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.getKey πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.keyPath πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.multiEntry πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.name πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.objectStore πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.openCursor πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.openKeyCursor πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBIndex.unique πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBKeyRange.bound_static πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.lower πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.lowerBound_static πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.lowerOpen πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.only_static πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.upper πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.upperBound_static πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBKeyRange.upperOpen πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBObjectStore.add πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.autoIncrement πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.clear πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.count πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.createIndex πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.delete πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.deleteIndex πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.get πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.index πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.indexNames πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.keyPath πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.name πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.openCursor πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.put πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBObjectStore.transaction πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBOpenDBRequest πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBOpenDBRequest.blocked_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBOpenDBRequest.upgradeneeded_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBRequest.error πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.error.transient_unrecoverable_read_errors πŸ“‹Firefox7/17/2012 Safari10/16/2014821
Chrome: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.Chrome: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.Chrome Android: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.Chrome Android: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.Opera: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.Opera: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.Opera Android: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.Opera Android: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.Samsung Internet: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.Samsung Internet: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.WebView Android: Returns a NotReadableError exception for unrecoverable read errors, and an UnknownError for transient read errors.WebView Android: Returns a NotFoundError exception for unrecoverable read errors, and a DataError for transient read errors.
api.IDBRequest.error_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.readyState πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.result πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.source πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.success_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBRequest.transaction πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBTransaction.abort πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.abort_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.complete_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.db πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.error πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.error_event πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.mode πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBTransaction.objectStore πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBVersionChangeEvent πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.IDBVersionChangeEvent.newVersion πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.IDBVersionChangeEvent.oldVersion πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.ImageData.ImageData πŸ“‹Firefox4/29/2014 Safari10/16/2014170
api.KeyboardEvent.location πŸ“‹Firefox8/28/2012 Safari10/16/2014779
api.OES_element_index_uint πŸ“‹Firefox9/17/2013 Safari10/16/2014394
api.OES_standard_derivatives πŸ“‹Firefox1/31/2012 Safari10/16/2014989
api.OES_texture_float πŸ“‹Firefox8/16/2011 Safari10/16/20141157
api.OES_texture_float_linear πŸ“‹Firefox9/17/2013 Safari10/16/2014394
Safari on iOS: Only supported on iPadOS.WebView on iOS: Only supported on iPadOS.
api.OES_texture_half_float πŸ“‹Firefox4/29/2014 Safari10/16/2014170
api.OES_texture_half_float_linear πŸ“‹Firefox6/10/2014 Safari10/16/2014128
api.OES_vertex_array_object πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.OES_vertex_array_object.bindVertexArrayOES πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.OES_vertex_array_object.createVertexArrayOES πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.OES_vertex_array_object.deleteVertexArrayOES πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.OES_vertex_array_object.isVertexArrayOES πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.OscillatorNode.setPeriodicWave πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.Path2D πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.Path2D πŸ“‹Firefox7/22/2014 Safari10/16/201486
Edge: Before Edge 79, the constructor for Path2D objects does not support invocation with a string consisting of SVG path data.
api.Path2D.arc πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.arcTo πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.bezierCurveTo πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.closePath πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.lineTo πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.moveTo πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.quadraticCurveTo πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Path2D.rect πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.Performance πŸ“‹Firefox9/27/2011 Safari10/16/20141115
Node.js: Only available as an internal instance.
api.Performance.navigation πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.Performance.now πŸ“‹Firefox8/28/2012 Safari10/16/2014779
Firefox: In Firefox 57.0.4 the accuracy was reduced to 20 microseconds.Firefox: In Firefox 59 the accuracy was reduced to 2 milliseconds.Firefox: In Firefox 60 the accuracy was increased to 1 millisecond.Firefox for Android: In Firefox for Android 57.0.4 the accuracy was reduced to 20 microseconds.Firefox for Android: In Firefox for Android 59 the accuracy was reduced to 2 milliseconds.Firefox for Android: In Firefox for Android 60 the accuracy was increased to 1 millisecond.
api.Performance.timing πŸ“‹Firefox9/27/2011 Safari10/16/20141115
Node.js: Returns node specific timing object
api.PerformanceNavigation πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceNavigation.redirectCount πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceNavigation.type πŸ“‹Firefox9/27/2011 Safari10/16/20141115
Firefox: Before Firefox 70, this property could return incorrect values. See bug 1459711.Firefox for Android: Before Firefox for Android 79, this property could return incorrect values. See bug 1459711.
api.PerformanceTiming πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.connectEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.connectStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domComplete πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domContentLoadedEventEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domContentLoadedEventStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domInteractive πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domLoading πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domainLookupEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.domainLookupStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.fetchStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.loadEventEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.loadEventStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.navigationStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.redirectEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.redirectStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.requestStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.responseEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.responseStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.unloadEventEnd πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PerformanceTiming.unloadEventStart πŸ“‹Firefox9/27/2011 Safari10/16/20141115
api.PeriodicWave πŸ“‹Firefox10/29/2013 Safari10/16/2014352
api.Range.Range πŸ“‹Firefox9/17/2013 Safari10/16/2014394
api.Text.Text πŸ“‹Firefox9/17/2013 Safari10/16/2014394
api.TextTrack.id πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.TextTrack.inBandMetadataTrackDispatchType πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.TextTrackList.getTrackById πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.VTTCue.VTTCue πŸ“‹Firefox7/22/2014 Safari10/16/201486
api.WEBGL_compressed_texture_s3tc πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.WEBGL_depth_texture πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.WEBGL_lose_context πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.WEBGL_lose_context.loseContext πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.WEBGL_lose_context.restoreContext πŸ“‹Firefox6/25/2013 Safari10/16/2014478
api.WheelEvent.deltaX πŸ“‹Firefox11/20/2012 Safari10/16/2014695
Internet Explorer: IE9 supports an old draft of the spec where this value was a long instead of a double.
api.WheelEvent.deltaY πŸ“‹Firefox11/20/2012 Safari10/16/2014695
Internet Explorer: IE9 supports an old draft of the spec where this value was a long instead of a double.
api.WheelEvent.deltaZ πŸ“‹Firefox11/20/2012 Safari10/16/2014695
Internet Explorer: IE9 supports an old draft of the spec where this value was a long instead of a double.
api.Window.beforeunload_event.event_returnvalue_activation Firefox8/16/2011 Safari10/16/20141157
Chrome: Before Chrome 119, an empty string incorrectly activated the confirmation dialog.Chrome Android: Before Chrome Android 119, an empty string incorrectly activated the confirmation dialog.Edge: Before Edge 119, an empty string incorrectly activated the confirmation dialog.Quest Browser: Before Quest Browser false, an empty string incorrectly activated the confirmation dialog.Opera: Before Opera 105, an empty string incorrectly activated the confirmation dialog.Opera Android: Before Opera Android 79, an empty string incorrectly activated the confirmation dialog.Samsung Internet: Before Samsung Internet 25.0, an empty string incorrectly activated the confirmation dialog.WebView Android: Before WebView Android 119, an empty string incorrectly activated the confirmation dialog.
api.WorkerGlobalScope.offline_event πŸ“‹Firefox4/29/2014 Safari10/16/2014170
api.WorkerGlobalScope.online_event πŸ“‹Firefox4/29/2014 Safari10/16/2014170
api.XMLHttpRequest.responseURL πŸ“‹Firefox9/2/2014 Safari10/16/201444
api.indexedDB πŸ“‹Firefox10/9/2012 Safari10/16/2014737
api.performance πŸ“‹Firefox9/27/2011 Safari10/16/20141115
Node.js: Available as a part of the perf_hooks module.
css.properties.background-blend-mode πŸ“‹Firefox6/10/2014 Safari10/16/2014128
css.properties.column-fill.auto πŸ“‹Firefox11/20/2012 Safari10/16/2014695
css.properties.column-fill.balance πŸ“‹Firefox11/20/2012 Safari10/16/2014695
css.properties.font-variant.turkic_is Firefox7/17/2012 Safari10/16/2014821
css.properties.mix-blend-mode πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.color-burn πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.color-dodge πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.darken πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.difference πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.exclusion πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.hard-light πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.lighten πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.multiply πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.normal πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.overlay πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.screen πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.mix-blend-mode.soft-light πŸ“‹Firefox9/2/2014 Safari10/16/201444
css.properties.text-decoration-color.currentColor πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-color.transparent πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-line.blink πŸ“‹Firefox12/10/2013 Safari10/16/2014310
Chrome: The blink value does not have any effect.Chrome Android: The blink value does not have any effect.Edge: The blink value does not have any effect.Firefox: The blink value does not have any effect.Firefox for Android: The blink value does not have any effect.Quest Browser: The blink value does not have any effect.Samsung Internet: The blink value does not have any effect.WebView Android: The blink value does not have any effect.
css.properties.text-decoration-line.line-through πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-line.none πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-line.overline πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-line.underline πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-style.dashed πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-style.dotted πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-style.double πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-style.solid πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-decoration-style.wavy πŸ“‹Firefox8/16/2011 Safari10/16/20141157
css.properties.text-transform.turkic_is Firefox7/17/2012 Safari10/16/2014821
css.types.blend-mode πŸ“‹Firefox6/10/2014 Safari10/16/2014128
html.elements.rtc πŸ“‹Firefox10/14/2014 Safari10/16/20142
html.elements.template πŸ“‹Firefox6/25/2013 Safari10/16/2014478
javascript.builtins.Array.entries πŸ“‹Firefox3/18/2014 Safari10/16/2014212
javascript.builtins.Array.fill πŸ“‹Firefox7/22/2014 Safari10/16/201486
javascript.builtins.Array.find πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Array.findIndex πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Array.keys πŸ“‹Firefox3/18/2014 Safari10/16/2014212
javascript.builtins.Map πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Map.Map πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Map.clear πŸ“‹Firefox2/19/2013 Safari10/16/2014604
javascript.builtins.Map.delete πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Map.entries πŸ“‹Firefox4/2/2013 Safari10/16/2014562
javascript.builtins.Map.forEach πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Map.get πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Map.has πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Map.keys πŸ“‹Firefox4/2/2013 Safari10/16/2014562
javascript.builtins.Map.set πŸ“‹Firefox6/5/2012 Safari10/16/2014863
Internet Explorer: Returns 'undefined' instead of the 'Map' object.
javascript.builtins.Map.size πŸ“‹Firefox2/19/2013 Safari10/16/2014604
Firefox: From Firefox 13 to Firefox 18, the size property was implemented as a Map.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.Firefox for Android: From Firefox for Android 14 to Firefox for Android 18, the size property was implemented as a Map.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.
javascript.builtins.Map.values πŸ“‹Firefox4/2/2013 Safari10/16/2014562
javascript.builtins.Math.acosh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.asinh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.atanh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.cbrt πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.cosh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.expm1 πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.fround πŸ“‹Firefox12/10/2013 Safari10/16/2014310
javascript.builtins.Math.hypot πŸ“‹Firefox2/4/2014 Safari10/16/2014254
javascript.builtins.Math.log10 πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.log1p πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.log2 πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.sinh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.tanh πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Math.trunc πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Promise πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.Promise πŸ“‹Firefox4/29/2014 Safari10/16/2014170
Firefox: Constructor requires a new operator since version 37.Firefox for Android: Constructor requires a new operator since version 37.Node.js: Constructor requires a new operator since version 4.Safari: Constructor requires a new operator since version 10.Safari on iOS: Constructor requires a new operator since version 10.WebView on iOS: Constructor requires a new operator since version 10.
javascript.builtins.Promise.all πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.catch πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.race πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.reject πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.resolve πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Promise.then πŸ“‹Firefox4/29/2014 Safari10/16/2014170
javascript.builtins.Set πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Set.Set πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Set.add πŸ“‹Firefox6/5/2012 Safari10/16/2014863
Internet Explorer: Returns 'undefined' instead of the 'Set' object.
javascript.builtins.Set.clear πŸ“‹Firefox2/19/2013 Safari10/16/2014604
javascript.builtins.Set.delete πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Set.entries πŸ“‹Firefox9/17/2013 Safari10/16/2014394
javascript.builtins.Set.forEach πŸ“‹Firefox10/29/2013 Safari10/16/2014352
javascript.builtins.Set.has πŸ“‹Firefox6/5/2012 Safari10/16/2014863
javascript.builtins.Set.keys πŸ“‹Firefox9/17/2013 Safari10/16/2014394
javascript.builtins.Set.size πŸ“‹Firefox2/19/2013 Safari10/16/2014604
Firefox: From Firefox 13 to Firefox 18, the size property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.Firefox for Android: From Firefox for Android 14 to Firefox for Android 18, the size property was implemented as a Set.prototype.size() method, this has been changed to a property in later versions conform to the ECMAScript 2015 specification.
javascript.builtins.Set.values πŸ“‹Firefox9/17/2013 Safari10/16/2014394
javascript.builtins.WeakMap πŸ“‹Firefox8/16/2011 Safari10/16/20141157
javascript.builtins.WeakMap.WeakMap πŸ“‹Firefox8/16/2011 Safari10/16/20141157
javascript.builtins.WeakMap.delete πŸ“‹Firefox8/16/2011 Safari10/16/20141157
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
javascript.builtins.WeakMap.get πŸ“‹Firefox8/16/2011 Safari10/16/20141157
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. However, the ES2015 specification specifies to return undefined instead. Furthermore, WeakMap.prototype.get accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. However, the ES2015 specification specifies to return undefined instead. Furthermore, WeakMap.prototype.get accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher.
javascript.builtins.WeakMap.has πŸ“‹Firefox8/16/2011 Safari10/16/20141157
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
javascript.builtins.WeakMap.set πŸ“‹Firefox8/16/2011 Safari10/16/20141157
Firefox: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Firefox for Android: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.Internet Explorer: Returns 'undefined' instead of the 'Map' object.
javascript.operators.spread πŸ“‹Firefox10/9/2012 Safari10/16/2014737
javascript.operators.spread.spread_in_arrays πŸ“‹Firefox10/9/2012 Safari10/16/2014737
javascript.operators.spread.spread_in_function_calls πŸ“‹Firefox2/4/2014 Safari10/16/2014254
api.AudioTrackList πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.AudioTrackList.addtrack_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.AudioTrackList.change_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.AudioTrackList.getTrackById πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.AudioTrackList.length πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.AudioTrackList.removetrack_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.HTMLFormControlsCollection.namedItem πŸ“‹Safari10/26/2007 Firefox10/14/20142545
Firefox: Returned a NodeList instead of a RadioNodeList.Firefox for Android: Returned a NodeList instead of a RadioNodeList.
api.HTMLMediaElement.audioTracks πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.HTMLMediaElement.videoTracks πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.RadioNodeList πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.RadioNodeList.value πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack.id πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack.kind πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack.label πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack.language πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrack.selected πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.addtrack_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.change_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.getTrackById πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.length πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.removetrack_event πŸ“‹Safari10/22/2013 Firefox10/14/2014357
api.VideoTrackList.selectedIndex πŸ“‹Safari10/22/2013 Firefox10/14/2014357
css.properties.list-style-type.arabic-indic πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.bengali πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.cambodian πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.cjk-earthly-branch πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.cjk-heavenly-stem πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.devanagari πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.gujarati πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.gurmukhi πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.kannada πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.khmer πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.lao πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.lower-armenian πŸ“‹Safari7/20/2011 Firefox10/14/20141182
css.properties.list-style-type.malayalam πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.mongolian πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.myanmar πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.oriya πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.persian πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.telugu πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.thai πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.tibetan πŸ“‹Safari6/7/2010 Firefox10/14/20141590
css.properties.list-style-type.upper-armenian πŸ“‹Safari7/20/2011 Firefox10/14/20141182
css.properties.list-style-type.urdu Safari6/7/2010 Firefox10/14/20141590
html.elements.a.rel.noreferrer πŸ“‹Safari6/7/2010 Firefox10/14/20141590
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)
html.elements.area.rel.noreferrer πŸ“‹Safari6/7/2010 Firefox10/14/20141590
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)

2014/9

API First Browser Date Last Browser Date Days Notes
api.HTMLAllCollection πŸ“‹Safari6/7/2010 Firefox9/2/20141548
api.HTMLAllCollection.item πŸ“‹Safari6/7/2010 Firefox9/2/20141548
api.HTMLAllCollection.length πŸ“‹Safari6/7/2010 Firefox9/2/20141548
api.HTMLAllCollection.namedItem πŸ“‹Safari6/7/2010 Firefox9/2/20141548
css.properties.box-decoration-break πŸ“‹Safari10/22/2013 Firefox9/2/2014315
Chrome: This property is only supported for inline elements.Chrome Android: This property is only supported for inline elements.Edge: This property is only supported for inline elements.Quest Browser: This property is only supported for inline elements.Safari: This property is only supported for inline elements.Safari on iOS: This property is only supported for inline elements.Samsung Internet: This property is only supported for inline elements.WebView Android: This property is only supported for inline elements.WebView on iOS: This property is only supported for inline elements.
css.properties.box-decoration-break.clone πŸ“‹Safari10/22/2013 Firefox9/2/2014315
Chrome: This value was only supported with the -webkit- prefix.Chrome Android: This value was only supported with the -webkit- prefix.Edge: This value was only supported with the -webkit- prefix.Quest Browser: This value was only supported with the -webkit- prefix.Opera: This value was only supported with the -webkit- prefix.Opera Android: This value was only supported with the -webkit- prefix.Samsung Internet: This value was only supported with the -webkit- prefix.WebView Android: This value was only supported with the -webkit- prefix.
css.properties.box-decoration-break.slice πŸ“‹Safari10/22/2013 Firefox9/2/2014315
Chrome: This value was only supported with the -webkit- prefix.Chrome Android: This value was only supported with the -webkit- prefix.Edge: This value was only supported with the -webkit- prefix.Quest Browser: This value was only supported with the -webkit- prefix.Opera: This value was only supported with the -webkit- prefix.Opera Android: This value was only supported with the -webkit- prefix.Samsung Internet: This value was only supported with the -webkit- prefix.WebView Android: This value was only supported with the -webkit- prefix.
css.selectors.scope πŸ“‹Safari10/22/2013 Firefox9/2/2014315
Firefox: Firefox 55 removes support for <style scoped> but not for the :scope pseudo-class, which is still supported. <style scoped> made it possible to explicitly set up element scopes, but ongoing discussions about the design of this feature as well as lack of other implementations resulted in the decision to remove it.Firefox for Android: Firefox for Android 55 removes support for <style scoped> but not for the :scope pseudo-class, which is still supported. <style scoped> made it possible to explicitly set up element scopes, but ongoing discussions about the design of this feature as well as lack of other implementations resulted in the decision to remove it.
css.selectors.scope.dom_api Safari10/22/2013 Firefox9/2/2014315
html.global_attributes.id πŸ“‹Safari6/23/2003 Firefox9/2/20144089
Firefox: id is a true global attribute only since Firefox 32.Firefox for Android: id is a true global attribute only since Firefox for Android 32.

2014/7

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.clip.path_parameter Safari10/22/2013 Firefox7/22/2014273
api.CanvasRenderingContext2D.fill.path_parameter Safari10/22/2013 Firefox7/22/2014273
api.CanvasRenderingContext2D.isPointInPath.path_parameter Safari10/22/2013 Firefox7/22/2014273
api.CanvasRenderingContext2D.isPointInStroke.path_parameter Safari10/22/2013 Firefox7/22/2014273
api.CanvasRenderingContext2D.stroke.path_parameter Safari10/22/2013 Firefox7/22/2014273
api.HTMLLinkElement.sizes πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Chrome: Before Chrome 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Chrome Android: Before Chrome Android 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Quest Browser: Before Quest Browser 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera: Before Opera 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera Android: Before Opera Android 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Samsung Internet: Before Samsung Internet 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.WebView Android: Before WebView 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.
api.HTMLMediaElement.addTextTrack πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLMediaElement.textTracks πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Before Firefox 50, text tracks would only load if the <track> element is in a document.Firefox for Android: Before Firefox for Android 50, text tracks would only load if the <track> element is in a document.
api.HTMLTrackElement.default πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement.kind πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement.label πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement.readyState πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement.src πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Before Firefox 50, setting the src property did not work properly.Firefox for Android: Before Firefox for Android 50, setting the src property did not work properly.
api.HTMLTrackElement.srclang πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.HTMLTrackElement.track πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.KeyboardEvent.KeyboardEvent πŸ“‹Safari10/22/2013 Firefox7/22/2014273
api.TextTrack πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Firefox versions before Firefox 50 didn't display captions when playing media without one or more video tracks being played.
api.TextTrack.activeCues πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Starting in Firefox 69, cues are no longer incorrectly loaded when the TextTrack's mode is disabled; if that's the case, the returned list is empty.
api.TextTrack.addCue πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrack.cuechange_event πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrack.cues πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Starting in Firefox 69, cues are no longer incorrectly loaded when the TextTrack's mode is disabled; if that's the case, the returned list is empty.
api.TextTrack.kind πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrack.label πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrack.language πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrack.mode πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Firefox: Before Firefox 52, using JavaScript to change the mode of a text track that's part of a media element would send one change event to the element's textTracks TextTrackList for each change, even if multiple changes are made in a single pass through the Firefox event loop. Starting in Firefox 52, these changes are reflected by a single event.
api.TextTrack.removeCue πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.endTime πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.enter_event πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.exit_event πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.id πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.pauseOnExit πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.startTime πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCue.track πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCueList πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCueList.getCueById πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackCueList.length πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackList πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackList.addtrack_event πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackList.change_event πŸ“‹Safari10/22/2013 Firefox7/22/2014273
api.TextTrackList.length πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.TextTrackList.removetrack_event πŸ“‹Safari10/22/2013 Firefox7/22/2014273
api.VTTCue πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.align πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.getCueAsHTML πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.line πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.position πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.size πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.snapToLines πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.text πŸ“‹Safari7/25/2012 Firefox7/22/2014727
api.VTTCue.vertical πŸ“‹Safari7/25/2012 Firefox7/22/2014727
css.properties.font-size.rem_values Safari10/22/2013 Firefox7/22/2014273
Firefox: Before Firefox 57, animations using em units are not affected by changes to the font-size of the animated element's parent (bug 1254424).Firefox: Before Firefox 57, some language settings' inherited font-size is smaller than expected (bug 1391341).
html.elements.link.sizes πŸ“‹Safari7/25/2012 Firefox7/22/2014727
html.elements.track πŸ“‹Safari7/25/2012 Firefox7/22/2014727
Chrome Android: Doesn't work for fullscreen video.Quest Browser: Doesn't work for fullscreen video.Samsung Internet: Doesn't work for fullscreen video.WebView Android: Doesn't work for fullscreen video.
html.elements.track.default πŸ“‹Safari7/25/2012 Firefox7/22/2014727
html.elements.track.kind πŸ“‹Safari7/25/2012 Firefox7/22/2014727
html.elements.track.label πŸ“‹Safari7/25/2012 Firefox7/22/2014727
html.elements.track.srclang πŸ“‹Safari7/25/2012 Firefox7/22/2014727
javascript.builtins.Math.clz32 πŸ“‹Safari10/22/2013 Firefox7/22/2014273

2014/6

API First Browser Date Last Browser Date Days Notes
api.SVGFEDropShadowElement πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.dx πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.dy πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.height πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.in1 πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.result πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.setStdDeviation πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.stdDeviationX πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.stdDeviationY πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.width πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.x πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.SVGFEDropShadowElement.y πŸ“‹Safari7/25/2012 Firefox6/10/2014685
api.console.count_static πŸ“‹Safari6/8/2009 Firefox6/10/20141828
html.elements.area.rel πŸ“‹Safari6/7/2010 Firefox6/10/20141464
javascript.builtins.TypedArray.named_properties Safari7/20/2011 Firefox6/10/20141056

2014/4

API First Browser Date Last Browser Date Days Notes
api.SVGFEComponentTransferElement.height πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEComponentTransferElement.result πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEComponentTransferElement.width πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEComponentTransferElement.x πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEComponentTransferElement.y πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEGaussianBlurElement.height πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEGaussianBlurElement.result πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEGaussianBlurElement.width πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEGaussianBlurElement.x πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.SVGFEGaussianBlurElement.y πŸ“‹Safari7/25/2012 Firefox4/29/2014643
api.ValidityState.badInput πŸ“‹Safari10/22/2013 Firefox4/29/2014189
api.console.worker_support Safari10/22/2013 Firefox4/29/2014189
css.properties.border-image.gradient Safari6/8/2009 Firefox4/29/20141786
css.properties.box-sizing πŸ“‹Safari7/20/2011 Firefox4/29/20141014
Chrome: box-sizing is not respected when the height is calculated from window.getComputedStyle().Chrome Android: box-sizing is not respected when the height is calculated from window.getComputedStyle().Firefox: Before Firefox 23, box-sizing is not respected when the height is calculated from window.getComputedStyle().Firefox for Android: Before Firefox for Android 23, box-sizing is not respected when the height is calculated from window.getComputedStyle().Internet Explorer: box-sizing is not respected when the height is calculated from window.getComputedStyle().Quest Browser: box-sizing is not respected when the height is calculated from window.getComputedStyle().Opera Android: box-sizing is not respected when the height is calculated from window.getComputedStyle().Samsung Internet: box-sizing is not respected when the height is calculated from window.getComputedStyle().WebView Android: box-sizing is not respected when the height is calculated from window.getComputedStyle().
css.selectors.in-range πŸ“‹Safari7/20/2011 Firefox4/29/20141014
Chrome: Before Chrome 52, :in-range matched disabled and read-only inputs (see bug 41248615). In Chrome 52, it was changed to only match enabled read-write inputs.Chrome Android: Before Chrome Android 52, :in-range matched disabled and read-only inputs (see bug 41248615). In Chrome Android 52, it was changed to only match enabled read-write inputs.Firefox: Before Firefox 50, :in-range matched disabled and read-only inputs (see bug 1264157). In Firefox 50, it was changed to only match enabled read-write inputs.Quest Browser: Before Quest Browser 5.0, :in-range matched disabled and read-only inputs (see bug 41248615). In Quest Browser 5.0, it was changed to only match enabled read-write inputs.Opera: Before Opera 39, :in-range matched disabled and read-only inputs (see bug 41248615). In Opera 39, it was changed to only match enabled read-write inputs.Opera Android: Before Opera 39, :in-range matched disabled and read-only inputs (see bug 41248615). In Opera 39, it was changed to only match enabled read-write inputs.Safari: In Safari, :in-range matched disabled and read-only inputs (see bug 156530). It was later changed to only match enabled read-write inputs.Safari on iOS: In Safari on iOS, :in-range matched disabled and read-only inputs (see bug 156530). It was later changed to only match enabled read-write inputs.Samsung Internet: Before version 6.0, :in-range matched disabled and read-only inputs (see bug 41248615). In version 6.0, it was changed to only match enabled read-write inputs.WebView Android: Before version 52, :in-range matched disabled and read-only inputs (see bug 41248615). In version 52, it was changed to only match enabled read-write inputs.WebView on iOS: In WebView on iOS, :in-range matched disabled and read-only inputs (see bug 156530). It was later changed to only match enabled read-write inputs.
css.selectors.out-of-range πŸ“‹Safari7/20/2011 Firefox4/29/20141014
html.elements.input.type_number πŸ“‹Safari7/20/2011 Firefox4/29/20141014
Chrome: Prevents users from typing non-numeric content.Chrome Android: Prevents users from typing non-numeric content.Firefox: Allows users to type non-numeric content, with the value reflecting an empty string.Firefox for Android: Allows users to type non-numeric content, with the value reflecting an empty string.Quest Browser: Prevents users from typing non-numeric content.Opera: Prevents users from typing non-numeric content.Opera Android: Prevents users from typing non-numeric content.Safari: Allows users to type non-numeric content, with the value reflecting an empty string.Safari on iOS: Allows users to type non-numeric content, with the value reflecting an empty string.Samsung Internet: Prevents users from typing non-numeric content.WebView Android: Prevents users from typing non-numeric content.WebView on iOS: Allows users to type non-numeric content, with the value reflecting an empty string.
javascript.builtins.ArrayBuffer.isView πŸ“‹Safari10/22/2013 Firefox4/29/2014189

2014/3

API First Browser Date Last Browser Date Days Notes
api.console.assert_static πŸ“‹Safari6/8/2009 Firefox3/18/20141744
Node.js: Throws error when assertion fails.
css.properties.align-items.flex_context.baseline Safari10/22/2013 Firefox3/18/2014147
css.properties.align-self.auto πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.align-self.flex_context.baseline πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.align-self.normal πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.align-self.stretch πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.column πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.column-reverse πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.nowrap πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.row πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.row-reverse πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.wrap πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-flow.wrap-reverse πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-wrap.nowrap πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-wrap.wrap πŸ“‹Safari10/22/2013 Firefox3/18/2014147
css.properties.flex-wrap.wrap-reverse πŸ“‹Safari10/22/2013 Firefox3/18/2014147
html.elements.iframe.sandbox.allow-popups πŸ“‹Safari7/25/2012 Firefox3/18/2014601

2014/2

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.getLineDash πŸ“‹Safari10/22/2013 Firefox2/4/2014105
api.CanvasRenderingContext2D.lineDashOffset πŸ“‹Safari10/22/2013 Firefox2/4/2014105
api.CanvasRenderingContext2D.setLineDash πŸ“‹Safari10/22/2013 Firefox2/4/2014105
api.ErrorEvent πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.ErrorEvent.ErrorEvent πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.ErrorEvent.filename πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.ErrorEvent.lineno πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.ErrorEvent.message πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.HTMLInputElement.setRangeText πŸ“‹Safari10/22/2013 Firefox2/4/2014105
api.HTMLTextAreaElement.setRangeText πŸ“‹Safari10/22/2013 Firefox2/4/2014105
api.TrackEvent πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.TrackEvent.TrackEvent πŸ“‹Safari7/25/2012 Firefox2/4/2014559
api.TrackEvent.track πŸ“‹Safari7/25/2012 Firefox2/4/2014559

2013/12

API First Browser Date Last Browser Date Days Notes
api.DOMTokenList.add.multiple_parameters Safari10/22/2013 Firefox12/10/201349
api.DOMTokenList.remove.multiple_parameters Safari10/22/2013 Firefox12/10/201349
api.HTMLAnchorElement.origin πŸ“‹Safari7/20/2011 Firefox12/10/2013874
Firefox: Before Firefox 49, results for URL using the blob scheme incorrectly returned null.Firefox for Android: Before Firefox for Android 49, results for URL using the blob scheme incorrectly returned null.
api.HTMLSelectElement.selectedOptions πŸ“‹Safari7/25/2012 Firefox12/10/2013503
api.MessageEvent.MessageEvent πŸ“‹Safari7/25/2012 Firefox12/10/2013503
api.Notification.dir πŸ“‹Safari10/22/2013 Firefox12/10/201349
api.WaveShaperNode.oversample πŸ“‹Safari7/25/2012 Firefox12/10/2013503

2013/10

API First Browser Date Last Browser Date Days Notes
api.AnalyserNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.fftSize πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.frequencyBinCount πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.getByteFrequencyData πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.getByteTimeDomainData πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.getFloatFrequencyData πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.maxDecibels πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.minDecibels πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AnalyserNode.smoothingTimeConstant πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer.duration πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer.getChannelData πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer.length πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer.numberOfChannels πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBuffer.sampleRate πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBufferSourceNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBufferSourceNode.buffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Firefox: Firefox currently handles the value null incorrectly. Instead of producing a node that generates a single channel of silence, the node becomes unusable and will be ignored if you attempt to connect it to anything.Firefox for Android: Firefox for Android currently handles the value null incorrectly. Instead of producing a node that generates a single channel of silence, the node becomes unusable and will be ignored if you attempt to connect it to anything.
api.AudioBufferSourceNode.loop πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBufferSourceNode.loopEnd πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioBufferSourceNode.loopStart πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioBufferSourceNode.playbackRate πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioBufferSourceNode.start πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioContext.createMediaElementSource πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Firefox: If a sample rate is specified for the audio context, it must match the sample rate of the stream, otherwise this method will fail.Firefox for Android: If a sample rate is specified for the audio context, it must match the sample rate of the stream, otherwise this method will fail.
api.AudioDestinationNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioListener πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioListener.setOrientation πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioListener.setPosition πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode.channelCount πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioNode.channelCountMode πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioNode.channelInterpretation πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioNode.connect πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode.context πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode.disconnect πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode.numberOfInputs πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioNode.numberOfOutputs πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.cancelScheduledValues πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.defaultValue πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.exponentialRampToValueAtTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Chrome Android: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.Firefox: Sometimes jumps to value immediately. See bug 2011524.Firefox for Android: Sometimes jumps to value immediately. See bug 2011524.Quest Browser: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.WebView Android: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.
api.AudioParam.linearRampToValueAtTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Chrome Android: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.Firefox: Sometimes jumps to value immediately. See bug 2011524.Firefox for Android: Sometimes jumps to value immediately. See bug 2011524.Quest Browser: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.WebView Android: Behaves like setValueAtTime(): Sets the target volume at the specified time, but doesn't ramp to it.
api.AudioParam.setTargetAtTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.setValueAtTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.setValueCurveAtTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioParam.value πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Chrome: Before version 66, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).Chrome Android: Before version 66, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).Firefox: Before Firefox 134, setting value was ignored when done at the same time as scheduled automation events.Firefox: Before Firefox 69, value did not take into account scheduled or gradiated changes to the parameter's value; instead, only explicitly set values were returned.Firefox for Android: Firefox for Android does not currently take into account scheduled or gradiated changes to the parameter's value; only the initial value or the most recent explicitly set value is returned.Quest Browser: Before version 5.0, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).Opera: Before version 53, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).Opera Android: Before version 47, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).Samsung Internet: Before version 9.0, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).WebView Android: Before version 66, the gain value of a GainNode would perform a smooth interpolation to prevent dezippering (instead of changing instantly).
api.AudioProcessingEvent Safari7/25/2012 Firefox10/29/2013461
api.AudioProcessingEvent.inputBuffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioProcessingEvent.outputBuffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioProcessingEvent.playbackTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.AudioScheduledSourceNode.ended_event πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioScheduledSourceNode.start πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.AudioScheduledSourceNode.stop πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.BaseAudioContext.createAnalyser πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createBiquadFilter πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createBuffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createBufferSource πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createChannelMerger πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createChannelSplitter πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createConvolver πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createDelay πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.BaseAudioContext.createDynamicsCompressor πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createGain πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.BaseAudioContext.createOscillator πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createPanner πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.createScriptProcessor πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.BaseAudioContext.createWaveShaper πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.currentTime πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.decodeAudioData πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.destination πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.listener πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BaseAudioContext.sampleRate πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode.Q πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode.detune πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.BiquadFilterNode.frequency πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode.gain πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode.getFrequencyResponse πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.BiquadFilterNode.type πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.ChannelMergerNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.ChannelSplitterNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Chrome: Starting in Chrome 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.Chrome Android: Starting in Chrome Android 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.Quest Browser: Starting in Quest Browser 5.0, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.Opera: Starting in Opera 43, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.Opera Android: Starting in Opera Android 43, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.Samsung Internet: Starting in Samsung Internet 6.0, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.WebView Android: Starting in version 56, channelCountMode is set to explicit and channelCount is fixed to the number of outputs, as per the latest spec.
api.ConvolverNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.ConvolverNode.buffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.ConvolverNode.normalize πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DelayNode πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.DelayNode.delayTime πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.DynamicsCompressorNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DynamicsCompressorNode.attack πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DynamicsCompressorNode.knee πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DynamicsCompressorNode.ratio πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DynamicsCompressorNode.reduction πŸ“‹Safari7/25/2012 Firefox10/29/2013461
Chrome: Before version 52, this was an AudioParam..Chrome Android: Before version 52, this was an AudioParam..Quest Browser: Before version 5.0, this was an AudioParam..Samsung Internet: Before Samsung Internet 6.0, this was an AudioParam..WebView Android: Before version 52, this was an AudioParam..
api.DynamicsCompressorNode.release πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.DynamicsCompressorNode.threshold πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.GainNode πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.GainNode.gain πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.HTMLIFrameElement.srcdoc πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.HTMLTableElement.createTBody πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.ImageData.worker_support Safari10/22/2013 Firefox10/29/20137
api.MediaElementAudioSourceNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OfflineAudioCompletionEvent πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OfflineAudioCompletionEvent.renderedBuffer πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OfflineAudioContext.complete_event πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.OfflineAudioContext.startRendering πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.OscillatorNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OscillatorNode.detune πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OscillatorNode.frequency πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.OscillatorNode.type πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.coneInnerAngle πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.coneOuterAngle πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.coneOuterGain πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.distanceModel πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.maxDistance πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.panningModel πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.refDistance πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.rolloffFactor πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.setOrientation πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.PannerNode.setPosition πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.Range.collapse.toStart_parameter_optional Safari6/23/2003 Firefox10/29/20133781
Internet Explorer: Optional but defaults to true.
api.SVGSVGElement.deselectAll πŸ“‹Safari10/26/2007 Firefox10/29/20132195
api.ScriptProcessorNode Safari10/22/2013 Firefox10/29/20137
api.ScriptProcessorNode.audioprocess_event Safari10/22/2013 Firefox10/29/20137
api.ScriptProcessorNode.bufferSize πŸ“‹Safari10/22/2013 Firefox10/29/20137
api.WaveShaperNode πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.WaveShaperNode.curve πŸ“‹Safari7/25/2012 Firefox10/29/2013461
api.WebGLVertexArrayObjectOES πŸ“‹Safari7/20/2011 Firefox10/29/2013832
css.properties.font-smooth Safari6/8/2009 Firefox10/29/20131604
Firefox: Only works on macOS.
html.elements.iframe.srcdoc πŸ“‹Safari7/25/2012 Firefox10/29/2013461
javascript.builtins.TypedArray.index_properties_not_consulting_prototype Safari7/20/2011 Firefox10/29/2013832
Bun: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Chrome: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Chrome Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Deno: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Edge: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Internet Explorer: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Node.js: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Quest Browser: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Opera: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Opera Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Safari: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Safari on iOS: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.Samsung Internet: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.WebView Android: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.WebView on iOS: Negative integers are not considered as indexed properties and therefore return the value of the prototype property.
api.BeforeUnloadEvent πŸ“‹Firefox11/29/2005 Safari10/22/20132884
api.BeforeUnloadEvent.returnValue πŸ“‹Firefox11/29/2005 Safari10/22/20132884
Chrome: Before Chrome 119, an empty string incorrectly activated the confirmation dialog.Chrome Android: Before Chrome Android 119, an empty string incorrectly activated the confirmation dialog.Quest Browser: Before Quest Browser false, an empty string incorrectly activated the confirmation dialog.Opera: Before Opera 105, an empty string incorrectly activated the confirmation dialog.Opera Android: Before Opera Android 79, an empty string incorrectly activated the confirmation dialog.WebView Android: Before WebView Android 119, an empty string incorrectly activated the confirmation dialog.
api.Blob.slice πŸ“‹Firefox6/5/2012 Safari10/22/2013504
Firefox: Before Firefox 12, there was a bug that affected the behavior of Blob.slice(); it did not work for start and end positions outside the range of signed 64-bit values; it has now been fixed to support unsigned 64-bit values.Firefox for Android: Before Firefox for Android 14, there was a bug that affected the behavior of Blob.slice(); it did not work for start and end positions outside the range of signed 64-bit values; it has now been fixed to support unsigned 64-bit values.
api.CanvasRenderingContext2D.isPointInStroke πŸ“‹Firefox2/19/2013 Safari10/22/2013245
api.CharacterData.remove πŸ“‹Firefox8/6/2013 Safari10/22/201377
api.DOMTokenList.toggle.force_parameter Firefox9/17/2013 Safari10/22/201335
api.Document.activeElement πŸ“‹Firefox6/17/2008 Safari10/22/20131953
Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.hasFocus πŸ“‹Firefox6/17/2008 Safari10/22/20131953
Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.hidden πŸ“‹Firefox1/8/2013 Safari10/22/2013287
Firefox: Since Firefox 56 it also returns true on macOS when the window is completely hidden by another non-translucent application.Firefox for Android: Since Firefox for Android 56 it also returns true on macOS when the window is completely hidden by another non-translucent application.
api.Document.visibilityState πŸ“‹Firefox1/8/2013 Safari10/22/2013287
api.DocumentType.remove πŸ“‹Firefox8/6/2013 Safari10/22/201377
api.Element.classList πŸ“‹Firefox1/21/2010 Safari10/22/20131370
Chrome: Not supported for SVG elements.Chrome Android: Not supported for SVG elements.Edge: Not supported for SVG elements.Internet Explorer: Not supported for SVG elements.Safari: Not supported for SVG elements.Safari on iOS: Not supported for SVG elements.Samsung Internet: Not supported for SVG elements.WebView Android: Not supported for SVG elements.WebView on iOS: Not supported for SVG elements.
api.Element.mouseenter_event πŸ“‹Firefox1/31/2012 Safari10/22/2013630
api.Element.mouseleave_event πŸ“‹Firefox1/31/2012 Safari10/22/2013630
api.Element.remove πŸ“‹Firefox8/6/2013 Safari10/22/201377
api.Element.wheel_event πŸ“‹Firefox11/20/2012 Safari10/22/2013336
Internet Explorer: The onwheel event handler property is not supported. To listen to this event, use element.addEventListener('wheel', function() {});. See IE bug 782835.
api.EventSource.EventSource.options_withCredentials_parameter Firefox3/13/2012 Safari10/22/2013588
api.EventSource.withCredentials πŸ“‹Firefox8/16/2011 Safari10/22/2013798
api.FocusEvent πŸ“‹Firefox9/17/2013 Safari10/22/201335
api.FocusEvent.FocusEvent πŸ“‹Firefox9/17/2013 Safari10/22/201335
api.FocusEvent.relatedTarget πŸ“‹Firefox9/17/2013 Safari10/22/201335
api.HTMLFieldSetElement.elements πŸ“‹Firefox3/22/2011 Safari10/22/2013945
api.HTMLInputElement.height πŸ“‹Firefox10/9/2012 Safari10/22/2013378
api.HTMLInputElement.width πŸ“‹Firefox10/9/2012 Safari10/22/2013378
api.HTMLOptGroupElement.disabled πŸ“‹Firefox11/9/2004 Safari10/22/20133269
Safari: The property can be set, but has no effect (see bug 227042).Safari on iOS: The property can be set, but has no effect (see bug 227042).WebView on iOS: The property can be set, but has no effect (see bug 227042).
api.MouseEvent.MouseEvent πŸ“‹Firefox3/13/2012 Safari10/22/2013588
api.MutationObserver πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationObserver.MutationObserver πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.addedNodes πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.attributeName πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.attributeNamespace πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.nextSibling πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.oldValue πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.previousSibling πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.removedNodes πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.target πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.MutationRecord.type πŸ“‹Firefox7/17/2012 Safari10/22/2013462
api.Notification πŸ“‹Firefox6/25/2013 Safari10/22/2013119
Chrome: Starting in Chrome 49, notifications do not work in incognito mode.Chrome: Before Chrome 42, service worker additions were not supported.Chrome Android: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Quest Browser: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Opera: Starting in Opera 36, notifications do not work in incognito mode.Opera: Before Opera 29, service worker additions were not supported.Opera Android: Notifications in Opera for Android are only available through service workers. To show notifications on Android, see ServiceWorkerRegistration.showNotification().Opera Android: Starting in Opera for Android 36, notifications do not work in incognito mode.Safari on iOS: The Notification interface is undefined, unless the page is a web app saved to the home screen. The app's manifest must have a non-default display value.Safari on iOS: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Samsung Internet: Notifications in Samsung Internet are only available through service workers. To show notifications on Android, see ServiceWorkerRegistration.showNotification().Samsung Internet: Starting in Samsung Internet 5.0, notifications do not work in incognito mode.
api.Notification.Notification πŸ“‹Firefox6/25/2013 Safari10/22/2013119
Chrome Android: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Chrome Android: This constructor always throws a TypeError exception.Quest Browser: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Quest Browser: This constructor always throws a TypeError exception.Opera Android: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Opera Android: This constructor always throws a TypeError exception.Safari on iOS: This constructor throws a ReferenceError exception, unless the page is a web app saved to the home screen. The app's manifest must have a non-default display value.Safari on iOS: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Samsung Internet: A notification can only be sent from a service worker. To show a notification, see ServiceWorkerRegistration.showNotification().Samsung Internet: This constructor always throws a TypeError exception.
api.Notification.click_event πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.Notification.close πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.Notification.close_event πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.Notification.error_event πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.Notification.permission_static πŸ“‹Firefox6/25/2013 Safari10/22/2013119
Safari on iOS: The parent Notification interface is undefined unless the page is a web app saved to the home screen. The app's manifest must have a non-default display value.
api.Notification.show_event πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.SVGGraphicsElement πŸ“‹Firefox4/2/2013 Safari10/22/2013203
Chrome: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Chrome Android: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Firefox: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Firefox for Android: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Internet Explorer: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Opera: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Opera Android: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Safari: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Safari on iOS: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.Samsung Internet: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.WebView Android: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.WebView on iOS: The SVGGraphicsElement interface itself is not present, but some of its members are available on interfaces that inherit from SVGGraphicsElement.
api.TransitionEvent πŸ“‹Firefox3/22/2011 Safari10/22/2013945
api.TransitionEvent.TransitionEvent πŸ“‹Firefox8/6/2013 Safari10/22/201377
api.UIEvent.UIEvent πŸ“‹Firefox3/13/2012 Safari10/22/2013588
api.URL πŸ“‹Firefox2/19/2013 Safari10/22/2013245
Firefox: Before version 57, Firefox had a bug whereby single quotes contained in URLs are escaped when accessed via URL APIs (see bug 1386683).Firefox for Android: Before version 57, Firefox for Android had a bug whereby single quotes contained in URLs are escaped when accessed via URL APIs (see bug 1386683).Node.js: Available as a part of the url module.
api.URL.hash πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.URL.host πŸ“‹Firefox6/25/2013 Safari10/22/2013119
api.WheelEvent.WheelEvent πŸ“‹Firefox11/20/2012 Safari10/22/2013336
api.WheelEvent.deltaMode πŸ“‹Firefox11/20/2012 Safari10/22/2013336
api.Window.cancelAnimationFrame πŸ“‹Firefox8/6/2013 Safari10/22/201377
api.Window.requestAnimationFrame πŸ“‹Firefox8/6/2013 Safari10/22/201377
Edge: Before version 17, Edge does not reliably fire requestAnimationFrame before the paint cycle.Firefox: Callback parameter is a DOMHighResTimestamp. This means ten microsecond precision and zero time as performance.now().Firefox: Callback parameter is a DOMTimestamp. This means millisecond precision and zero time as Date.now().Firefox: Could be called with no input parameters.Internet Explorer: Internet Explorer does not reliably fire requestAnimationFrame before the paint cycle.
api.XMLHttpRequest.responseType.document_value Firefox3/13/2012 Safari10/22/2013588
api.XMLHttpRequest.responseType.json_value Firefox1/31/2012 Safari10/22/2013630
api.XMLHttpRequest.send.body_ArrayBufferView_type Firefox4/2/2013 Safari10/22/2013203
api.XMLHttpRequest.timeout πŸ“‹Firefox4/24/2012 Safari10/22/2013546
api.XMLHttpRequest.timeout_event πŸ“‹Firefox4/24/2012 Safari10/22/2013546
api.XMLHttpRequestUpload.timeout_event πŸ“‹Firefox4/24/2012 Safari10/22/2013546
css.at-rules.media.nested-queries Firefox3/13/2012 Safari10/22/2013588
css.properties.align-items.flex_context πŸ“‹Firefox4/2/2013 Safari10/22/2013203
Chrome: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.Chrome Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome Android implements the new behavior beginning with Chrome Android 52.Firefox: Multi-line flexbox has been supported since Firefox 28.Firefox for Android: Multi-line flexbox has been supported since Firefox for Android 28.Internet Explorer: In Internet Explorer 10 and 11, if column flex items have align-items: center; set on them and their content is too large, then they will overflow the bounds of their container. See Flexbug #2.Opera: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Opera implements the new behavior beginning with Opera 39.Opera Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Opera Android implements the new behavior beginning with Opera Android 41.Samsung Internet: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Samsung Internet implements the new behavior beginning with Samsung Internet 6.0.WebView Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. WebView Android implements the new behavior beginning with WebView Android 52.
css.properties.align-self.flex_context πŸ“‹Firefox4/2/2013 Safari10/22/2013203
Chrome: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.Chrome Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome Android implements the new behavior beginning with Chrome Android 52.Firefox: Before Firefox 27, only single-line flexbox is supported.Firefox for Android: Before Firefox for Android 27, only single-line flexbox is supported.Samsung Internet: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Samsung Internet implements the new behavior beginning with Samsung Internet 6.0.WebView Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. WebView Android implements the new behavior beginning with WebView Android 52.
css.properties.background-position.side-relative_values Firefox6/5/2012 Safari10/22/2013504
css.properties.clip-path.html_elements Firefox6/30/2009 Safari10/22/20131575
css.properties.flex.auto πŸ“‹Firefox6/25/2013 Safari10/22/2013119
css.properties.flex.none πŸ“‹Firefox6/25/2013 Safari10/22/2013119
css.properties.flex-direction.column πŸ“‹Firefox6/25/2013 Safari10/22/2013119
css.properties.flex-direction.row πŸ“‹Firefox6/25/2013 Safari10/22/2013119
css.properties.image-rendering.optimizeQuality Firefox1/21/2010 Safari10/22/20131370
css.properties.image-rendering.optimizeSpeed Firefox1/21/2010 Safari10/22/20131370
css.properties.justify-content.flex_context πŸ“‹Firefox4/2/2013 Safari10/22/2013203
Chrome: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome implements the new behavior beginning with Chrome 52.Chrome Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Chrome Android implements the new behavior beginning with Chrome Android 52.Firefox: Before Firefox 27, Firefox supported only single-line flexbox.Firefox for Android: Before Firefox for Android 27, Firefox for Android supported only single-line flexbox.Samsung Internet: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. Samsung Internet implements the new behavior beginning with Samsung Internet 6.0.WebView Android: Older versions of the specification treat absolute positioned children as though they are a 0 by 0 flex item. Later specification versions take the children out of the flow and set their positions based on align and justify properties. WebView Android implements the new behavior beginning with WebView Android 52.
css.properties.justify-content.left Firefox4/2/2013 Safari10/22/2013203
css.properties.justify-content.normal Firefox4/2/2013 Safari10/22/2013203
css.properties.justify-content.right Firefox4/2/2013 Safari10/22/2013203
css.properties.width.is_animatable Firefox10/9/2012 Safari10/22/2013378
css.selectors.after.animation_and_transition_support Firefox3/22/2011 Safari10/22/2013945
css.selectors.before.animation_and_transition_support Firefox3/22/2011 Safari10/22/2013945
css.types.calc πŸ“‹Firefox10/9/2012 Safari10/22/2013378
Firefox: Before Firefox 59 calc() is not supported in rgb() and other color functions.Firefox: Before Firefox 57 calc(1*2*3) is not parsed successfully.Firefox: Firefox 57 increased the number of places calc() could substitute another value. See bug 1350857.Firefox for Android: Before Firefox for Android 59 calc() is not supported in rgb() and other color functions.Firefox for Android: Before Firefox for Android 57 calc(1*2*3) is not parsed successfully.Firefox for Android: Firefox for Android 57 increased the number of places calc() could substitute another value. See bug 1350857.
css.types.gradient πŸ“‹Firefox1/21/2010 Safari10/22/20131370
Firefox: Gradients are limited to background-image, border-image, and mask-image.Firefox for Android: Gradients are limited to background-image, border-image, and mask-image.
css.types.gradient.linear-gradient πŸ“‹Firefox10/9/2012 Safari10/22/2013378
Firefox: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Firefox for Android: Since Firefox for Android 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox for Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Internet Explorer: Internet Explorer 5.5 through 9.0 supported gradients via a proprietary filter: -ms-filter: progid:DXImageTransform.Microsoft.Gradient().Opera: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Safari: Safari 4 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in linear-gradient(). This old outdated syntax is still supported for compatibility purposes.Safari: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Safari on iOS: Safari on iOS 3.2 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in linear-gradient(). This old outdated syntax is still supported for compatibility purposes.Safari on iOS: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.WebView on iOS: WebView on iOS 3.2 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in linear-gradient(). This old outdated syntax is still supported for compatibility purposes.WebView on iOS: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.
css.types.gradient.linear-gradient.to Firefox1/31/2012 Safari10/22/2013630
css.types.gradient.radial-gradient πŸ“‹Firefox10/9/2012 Safari10/22/2013378
Firefox: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox for Android: Since Firefox for Android 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Internet Explorer: Internet Explorer 5.5 through 9.0 supported gradients via a proprietary filter: -ms-filter: progid:DXImageTransform.Microsoft.Gradient().Safari: Safari 4 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.Safari on iOS: Safari on iOS 3.2 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.WebView on iOS: WebView on iOS 3.2 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.
css.types.gradient.radial-gradient.at Firefox1/31/2012 Safari10/22/2013630
css.types.gradient.repeating-linear-gradient πŸ“‹Firefox10/9/2012 Safari10/22/2013378
Firefox: Before Firefox 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Firefox for Android: Before Firefox for Android 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox for Android: Since Firefox for Android 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox for Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Internet Explorer: Internet Explorer 5.5 through 9.0 supported gradients via a proprietary filter: -ms-filter: progid:DXImageTransform.Microsoft.Gradient().Opera: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Opera Android: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Safari: Safari 4 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in repeating-linear-gradient(). This old outdated syntax is still supported for compatibility purposes.Safari: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.Safari on iOS: Safari on iOS 3.2 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in repeating-linear-gradient(). This old outdated syntax is still supported for compatibility purposes.Safari on iOS: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.WebView on iOS: WebView on iOS 3.2 was supporting an experimental -webkit-gradient(linear,…) function. It is more limited than the later standard version: you cannot specify both a position and an angle like in repeating-linear-gradient(). This old outdated syntax is still supported for compatibility purposes.WebView on iOS: Considers <angle> to start to the right, instead of the top. I.e. it considered an angle of 0deg as a direction indicator pointing to the right.
css.types.gradient.repeating-linear-gradient.to Firefox1/31/2012 Safari10/22/2013630
css.types.gradient.repeating-radial-gradient πŸ“‹Firefox10/9/2012 Safari10/22/2013378
Firefox: Before Firefox 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox for Android: Before Firefox 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox for Android: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Safari: Safari 4 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.Safari on iOS: Safari on iOS 3.2 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.WebView on iOS: WebView on iOS 3.2 was supporting an experimental -webkit-gradient(radial,…) function. This old outdated syntax is still supported for compatibility purposes.
css.types.gradient.repeating-radial-gradient.at Firefox10/9/2012 Safari10/22/2013378
Firefox: Before Firefox 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox: Since Firefox 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.Firefox for Android: Before Firefox for Android 36, gradients weren't applied on the pre-multiplied color space, leading to shades of grey unexpectedly appearing when used with transparency.Firefox for Android: Since Firefox for Android 42, the prefixed version of gradients can be disabled by setting layout.css.prefixes.gradients to false.
css.types.length.ch Firefox11/9/2004 Safari10/22/20133269
Firefox: From Firefox 1 to Firefox 3, ch was the width of the M character.Firefox: From Firefox 1 to Firefox 3, ch did not work with border-width and outline-width CSS properties.
css.types.length.vmax Firefox2/19/2013 Safari10/22/2013245
Firefox: Starting with version 21, viewport-percentage lengths are invalid in @page.Firefox for Android: Starting with version 21, viewport-percentage lengths are invalid in @page.
css.types.length.vmin Firefox2/19/2013 Safari10/22/2013245
Firefox: Starting with version 21, viewport-percentage lengths are invalid in @page.Firefox for Android: Starting with version 21, viewport-percentage lengths are invalid in @page.
css.types.position.four_value_syntax Firefox6/5/2012 Safari10/22/2013504
html.elements.main πŸ“‹Firefox5/14/2013 Safari10/22/2013161
html.elements.optgroup.disabled πŸ“‹Firefox11/9/2004 Safari10/22/20133269
Safari: Before Safari 7, the attribute can be set, but has no effect.Safari on iOS: The attribute can be set, but has no effect.WebView on iOS: The attribute can be set, but has no effect.
html.elements.output πŸ“‹Firefox3/22/2011 Safari10/22/2013945
html.elements.output.for πŸ“‹Firefox3/22/2011 Safari10/22/2013945
html.elements.output.form πŸ“‹Firefox3/22/2011 Safari10/22/2013945
html.elements.output.name πŸ“‹Firefox3/22/2011 Safari10/22/2013945
html.elements.time πŸ“‹Firefox6/25/2013 Safari10/22/2013119
html.elements.time.datetime Firefox6/25/2013 Safari10/22/2013119
http.headers.Authorization.NTLM Firefox11/9/2004 Safari10/22/20133269
http.headers.Authorization.Negotiate πŸ“‹Firefox11/9/2004 Safari10/22/20133269
http.headers.Content-Security-Policy πŸ“‹Firefox8/6/2013 Safari10/22/201377
Internet Explorer: Only supporting 'sandbox' directive.
http.headers.Content-Security-Policy.default-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.font-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.frame-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.img-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.media-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.object-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.report-uri πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.script-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy.style-src πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Content-Security-Policy-Report-Only πŸ“‹Firefox8/6/2013 Safari10/22/201377
http.headers.Strict-Transport-Security πŸ“‹Firefox3/22/2011 Safari10/22/2013945
http.headers.WWW-Authenticate.NTLM Firefox11/9/2004 Safari10/22/20133269
http.headers.WWW-Authenticate.Negotiate πŸ“‹Firefox11/9/2004 Safari10/22/20133269
http.status.308 πŸ“‹Firefox7/17/2012 Safari10/22/2013462
Internet Explorer: Does not work below Windows 10.
javascript.builtins.Math.imul πŸ“‹Firefox4/2/2013 Safari10/22/2013203
javascript.statements.for_of πŸ“‹Firefox6/5/2012 Safari10/22/2013504
Firefox: Before Firefox 51, using the for...of loop construct with the const keyword threw a SyntaxError ("missing = in const declaration").Firefox for Android: Before Firefox for Android 51, using the for...of loop construct with the const keyword threw a SyntaxError ("missing = in const declaration").

2013/9

API First Browser Date Last Browser Date Days Notes
api.Element.blur_event πŸ“‹Safari3/18/2008 Firefox9/17/20132009
Firefox: The interface for this event is Event, not FocusEvent.Firefox for Android: The interface for this event is Event, not FocusEvent.
api.Element.focus_event πŸ“‹Safari3/18/2008 Firefox9/17/20132009
Firefox: The interface for this event is Event, not FocusEvent.Firefox for Android: The interface for this event is Event, not FocusEvent.

2013/8

API First Browser Date Last Browser Date Days Notes
api.TransitionEvent.pseudoElement πŸ“‹Safari7/25/2012 Firefox8/6/2013377
html.elements.input.type_range πŸ“‹Safari3/18/2008 Firefox8/6/20131967
WebView Android: Pre-Chromium Android WebView recognizes the range type, but doesn't implement a range-specific control.

2013/6

API First Browser Date Last Browser Date Days Notes
api.Element.copy_event πŸ“‹Safari10/26/2007 Firefox6/25/20132069
Internet Explorer: Before Internet Explorer 9, this event is not supported via addEventListener; however, the event handler is supported since IE 5.5. The event can be listened to via element.oncopy.
api.Element.cut_event πŸ“‹Safari10/26/2007 Firefox6/25/20132069
Internet Explorer: Before Internet Explorer 9, this event is not supported via addEventListener; however, the event handler is supported since IE 5.5. The event can be listened to via element.oncopy.
api.Element.paste_event πŸ“‹Safari10/26/2007 Firefox6/25/20132069
Internet Explorer: Before Internet Explorer 11, copying files does not trigger the paste event.Internet Explorer: Before Internet Explorer 9, this event is not supported via addEventListener; however, the event handler is supported since IE 5.5. The event can be listened to via element.oncopy.
api.FormData.append.filename_parameter Safari7/25/2012 Firefox6/25/2013335
api.HTMLAnchorElement.toString πŸ“‹Safari10/26/2007 Firefox6/25/20132069
api.Location.toString πŸ“‹Safari6/23/2003 Firefox6/25/20133655
Internet Explorer: Intranet sites are set to Compatibility View, which will emulate IE7 and omit window.location.toString.
api.SVGAnimatedPreserveAspectRatio.animVal πŸ“‹Safari7/25/2012 Firefox6/25/2013335
api.SVGAnimatedPreserveAspectRatio.baseVal πŸ“‹Safari7/25/2012 Firefox6/25/2013335
api.SVGFEImageElement.preserveAspectRatio πŸ“‹Safari7/25/2012 Firefox6/25/2013335
css.properties.background.background-clip Safari7/20/2011 Firefox6/25/2013706
css.properties.background.background-origin Safari7/20/2011 Firefox6/25/2013706

2013/5

API First Browser Date Last Browser Date Days Notes
api.Crypto πŸ“‹Safari6/7/2010 Firefox5/14/20131072
Deno: Crypto is not a concrete interface, but its methods are available on Window.crypto.Node.js: Available as a part of the crypto module.
api.Crypto.getRandomValues πŸ“‹Safari6/7/2010 Firefox5/14/20131072
Node.js: Since v17.4.0, a similar method is available via the crypto module.
api.Element.scrollHeight πŸ“‹Safari6/23/2003 Firefox5/14/20133613
Firefox: Before Firefox 21, when an element's content does not generate a vertical scrollbar, then its scrollHeight property is equal to its clientHeight property. This can mean either the content is too short to require a scrollbar or that the element has a CSS style overflow value of visible (non-scrollable).Firefox for Android: Before Firefox for Android 21, when an element's content does not generate a vertical scrollbar, then its scrollHeight property is equal to its clientHeight property. This can mean either the content is too short to require a scrollbar or that the element has a CSS style overflow value of visible (non-scrollable).Internet Explorer: In Internet Explorer 5 through 7, if padding is set, the value of scrollHeight is equal to the sum of the top and bottom padding. This behavior was fixed in Internet Explorer 8.
api.Location.origin πŸ“‹Safari7/20/2011 Firefox5/14/2013664
Firefox: Before Firefox 49, results for URL using the blob scheme incorrectly returned null.Firefox for Android: Before Firefox for Android 49, results for URL using the blob scheme incorrectly returned null.Internet Explorer: Intranet sites are set to Compatibility View, which will emulate IE7 and omit window.location.origin.
css.properties.user-select.none Safari4/29/2005 Firefox5/14/20132937
javascript.builtins.parseInt.leading_zero_strings_as_decimal Safari7/25/2012 Firefox5/14/2013293

2013/4

API First Browser Date Last Browser Date Days Notes
api.CSSGroupingRule.cssRules πŸ“‹Safari10/26/2007 Firefox4/2/20131985
api.CSSGroupingRule.deleteRule πŸ“‹Safari10/26/2007 Firefox4/2/20131985
api.CSSGroupingRule.insertRule πŸ“‹Safari10/26/2007 Firefox4/2/20131985
api.HTMLMediaElement.defaultPlaybackRate πŸ“‹Safari3/18/2008 Firefox4/2/20131841
api.HTMLMediaElement.playbackRate πŸ“‹Safari3/18/2008 Firefox4/2/20131841
Chrome: Setting the playbackRate to a negative value will throw an error.Chrome Android: Setting the playbackRate to a negative value will throw an error.Edge: Setting the playbackRate to a negative value will throw an error.Firefox: Setting the playbackRate to a negative value will throw an error.Firefox for Android: Setting the playbackRate to a negative value will throw an error.Quest Browser: Setting the playbackRate to a negative value will throw an error.Opera: Setting the playbackRate to a negative value will throw an error.Opera Android: Setting the playbackRate to a negative value will throw an error.Samsung Internet: Setting the playbackRate to a negative value will throw an error.WebView Android: Setting the playbackRate to a negative value will throw an error.
api.HTMLTableRowElement.insertCell.index_parameter_negative_one Safari10/26/2007 Firefox4/2/20131985
api.HTMLTableRowElement.insertCell.index_parameter_optional Safari10/26/2007 Firefox4/2/20131985
api.SVGTextPathElement.method πŸ“‹Safari3/18/2008 Firefox4/2/20131841
api.SVGTextPathElement.spacing πŸ“‹Safari3/18/2008 Firefox4/2/20131841
api.SVGTextPathElement.startOffset πŸ“‹Safari3/18/2008 Firefox4/2/20131841
api.Window.postMessage.transfer_parameter Safari6/7/2010 Firefox4/2/20131030

2013/2

API First Browser Date Last Browser Date Days Notes
api.CSSPageRule πŸ“‹Safari10/26/2007 Firefox2/19/20131943
api.CSSPageRule.style πŸ“‹Safari10/26/2007 Firefox2/19/20131943
api.Document.URL πŸ“‹Safari10/26/2007 Firefox2/19/20131943
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.compatMode πŸ“‹Safari7/20/2011 Firefox2/19/2013580
Chrome: Only supported for HTMLDocument, not all Document objects.Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.URL.createObjectURL_static πŸ“‹Safari7/25/2012 Firefox2/19/2013209
Firefox: createObjectURL() is no longer available within the context of a ServiceWorker.Firefox for Android: createObjectURL() is no longer available within the context of a ServiceWorker.Internet Explorer: If the underlying object does not have a content type set, using this URL as the src of an img tag fails intermittently with error DOM7009.
api.URL.revokeObjectURL_static πŸ“‹Safari7/25/2012 Firefox2/19/2013209
Firefox: revokeObjectURL() is no longer available within the context of a ServiceWorker.Firefox for Android: revokeObjectURL() is no longer available within the context of a ServiceWorker.
css.properties.page-break-inside πŸ“‹Safari4/15/2005 Firefox2/19/20132867
css.properties.page-break-inside.auto πŸ“‹Safari4/15/2005 Firefox2/19/20132867
css.properties.page-break-inside.avoid πŸ“‹Safari4/15/2005 Firefox2/19/20132867
Firefox: Until Firefox 25, page-break-inside: avoid did not work with the height of a block.Firefox for Android: Until Firefox for Android 25, page-break-inside: avoid did not work with the height of a block.
css.types.calc.gradient_color_stops Safari7/25/2012 Firefox2/19/2013209
css.types.global_keywords.initial πŸ“‹Safari2/2/2004 Firefox2/19/20133305
css.types.length.vh Safari7/25/2012 Firefox2/19/2013209
Firefox: Starting with version 21, viewport-percentage lengths are invalid in @page.Firefox for Android: Starting with version 21, viewport-percentage lengths are invalid in @page.
css.types.length.vw Safari7/25/2012 Firefox2/19/2013209
Firefox: Starting with version 21, viewport-percentage lengths are invalid in @page.Firefox for Android: Starting with version 21, viewport-percentage lengths are invalid in @page.

2013/1

API First Browser Date Last Browser Date Days Notes
api.HTMLOListElement.reversed πŸ“‹Safari7/25/2012 Firefox1/8/2013167
api.ProgressEvent.ProgressEvent πŸ“‹Safari7/25/2012 Firefox1/8/2013167
api.WebSocket.send πŸ“‹Safari6/7/2010 Firefox1/8/2013946
Firefox: Only parameter of type ArrayBuffer and String supported.Firefox: Only parameter of type String supported.Firefox: Only parameter of type String supported. Returns boolean.Firefox for Android: Only parameter of type ArrayBuffer and String supported.Firefox for Android: Only parameter of type String supported.Firefox for Android: Only parameter of type String supported. Returns boolean.
api.Window.devicePixelRatio πŸ“‹Safari10/26/2007 Firefox1/8/20131901
Safari: In Safari, the devicePixelRatio does not change when the page is zoomed. See bug 124862.Safari on iOS: In Safari on iOS, the devicePixelRatio does not change when the page is zoomed. See bug 124862.WebView on iOS: In WebView on iOS, the devicePixelRatio does not change when the page is zoomed. See bug 124862.
html.elements.ol.reversed πŸ“‹Safari7/25/2012 Firefox1/8/2013167

2012/11

API First Browser Date Last Browser Date Days Notes
api.Event.initEvent πŸ“‹Safari6/23/2003 Firefox11/20/20123438
Firefox: Before Firefox 17, a call to this method after the dispatching of the event raised an exception instead of doing nothing.Firefox for Android: Before Firefox for Android 17, a call to this method after the dispatching of the event raised an exception instead of doing nothing.
api.HTMLIFrameElement.sandbox πŸ“‹Safari6/7/2010 Firefox11/20/2012897
Chrome: Before Chrome 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Chrome Android: Before Chrome Android 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Firefox: Previously, the type of sandbox was a DOMString instead of a DOMSettableTokenList. This has been fixed with Firefox 29. Other browsers may still implement the property as DOMString since it was a late change in the specification.Firefox for Android: Previously, the type of sandbox was a DOMString instead of a DOMSettableTokenList. This has been fixed with Firefox for Android 29. Other browsers may still implement the property as DOMString since it was a late change in the specification.Quest Browser: Before Quest Browser 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera: Before Opera 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera Android: Before Opera Android 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Samsung Internet: Before Samsung Internet 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.WebView Android: Before WebView Android 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.
api.Range.intersectsNode πŸ“‹Safari10/26/2007 Firefox11/20/20121852
api.WheelEvent πŸ“‹Safari10/26/2007 Firefox11/20/20121852
html.elements.iframe.sandbox πŸ“‹Safari6/7/2010 Firefox11/20/2012897

2012/10

API First Browser Date Last Browser Date Days Notes
api.HTMLInputElement.max πŸ“‹Safari6/7/2010 Firefox10/9/2012855
api.HTMLInputElement.min πŸ“‹Safari6/7/2010 Firefox10/9/2012855
api.HTMLInputElement.step πŸ“‹Safari6/7/2010 Firefox10/9/2012855
api.HTMLInputElement.stepDown πŸ“‹Safari6/7/2010 Firefox10/9/2012855
Firefox: Does not have a specific UI. There are still differences with the latest spec; see bug 835773.Firefox for Android: Does not have a specific UI. There are still differences with the latest spec; see bug 835773.
api.HTMLInputElement.stepUp πŸ“‹Safari6/7/2010 Firefox10/9/2012855
Firefox: Does not have a specific UI. There are still differences with the latest spec; see bug 835773.Firefox for Android: Does not have a specific UI. There are still differences with the latest spec; see bug 835773.
api.HTMLInputElement.valueAsNumber πŸ“‹Safari6/7/2010 Firefox10/9/2012855
api.HTMLMeterElement πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.high πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.low πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.max πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.min πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.optimum πŸ“‹Safari7/25/2012 Firefox10/9/201276
api.HTMLMeterElement.value πŸ“‹Safari7/25/2012 Firefox10/9/201276
css.properties.animation-direction.alternate-reverse πŸ“‹Safari7/25/2012 Firefox10/9/201276
css.properties.animation-direction.reverse πŸ“‹Safari7/25/2012 Firefox10/9/201276
css.properties.transform.3d Safari6/8/2009 Firefox10/9/20121219
css.properties.transition-property.IDENT_value Safari6/8/2009 Firefox10/9/20121219
html.elements.input.max πŸ“‹Safari6/7/2010 Firefox10/9/2012855
html.elements.input.min πŸ“‹Safari6/7/2010 Firefox10/9/2012855
html.elements.input.step πŸ“‹Safari6/7/2010 Firefox10/9/2012855
html.elements.meter πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.high πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.low πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.max πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.min πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.optimum πŸ“‹Safari7/25/2012 Firefox10/9/201276
html.elements.meter.value πŸ“‹Safari7/25/2012 Firefox10/9/201276

2012/8

API First Browser Date Last Browser Date Days Notes
api.HTMLMediaElement.played πŸ“‹Safari3/18/2008 Firefox8/28/20121624
api.HTMLSourceElement.media πŸ“‹Safari3/18/2008 Firefox8/28/20121624
api.SVGAnimatedRect.animVal πŸ“‹Safari10/26/2007 Firefox8/28/20121768
api.SVGAnimatedRect.baseVal πŸ“‹Safari10/26/2007 Firefox8/28/20121768
api.SVGViewElement πŸ“‹Safari10/26/2007 Firefox8/28/20121768
api.SVGViewElement.preserveAspectRatio πŸ“‹Safari10/26/2007 Firefox8/28/20121768
api.SVGViewElement.viewBox πŸ“‹Safari10/26/2007 Firefox8/28/20121768
css.properties.border-image πŸ“‹Safari7/25/2012 Firefox8/28/201234
Chrome: Before Chrome 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Chrome Android: Before Chrome Android 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Edge: Before Edge 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Firefox: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797).Firefox: Until Firefox 47, SVGs without viewport were not sliced correctly (bug 619500).Firefox: From Firefox 48 until Firefox 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809).Firefox: Until Firefox 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782).Firefox: Before Firefox 15, an earlier version of the specification was implemented, prefixed.Firefox for Android: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797).Firefox for Android: Until Firefox for Android 47, SVGs without viewport were not sliced correctly (bug 619500).Firefox for Android: From Firefox for Android 48 until Firefox for Android 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809).Firefox for Android: Until Firefox for Android 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782).Firefox for Android: Before Firefox for Android 15, an earlier version of the specification was implemented, prefixed.Quest Browser: Before Quest Browser false, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Opera: Before Opera 98, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Opera Android: A border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Samsung Internet: Before Samsung Internet 23.0, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).WebView Android: Before WebView 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
css.properties.border-image.fill Safari7/25/2012 Firefox8/28/201234
css.properties.border-image.optional_border_image_slice Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-outset πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-repeat πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-repeat.repeat πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-repeat.stretch πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-slice πŸ“‹Safari7/25/2012 Firefox8/28/201234
Firefox: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797).Firefox: Until Firefox 47, SVGs without viewport were not sliced correctly (bug 619500).Firefox: From Firefox 48 until Firefox 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809).Firefox: Until Firefox 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782).Firefox for Android: Small SVGs are incorrectly stretched, because percentages in border-image-slice are computed to integers instead of floats (bug 1284797).Firefox for Android: Until Firefox for Android 47, SVGs without viewport were not sliced correctly (bug 619500).Firefox for Android: From Firefox for Android 48 until Firefox for Android 49, SVGs without viewport are displayed the same as SVGs with viewport, but if the slices are not exactly 50%, they are incorrectly stretched (bug 1264809).Firefox for Android: Until Firefox for Android 57, an issue persisted for SVGs without viewport when e10s was disabled (bug 1290782).
css.properties.border-image-source πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-source.none πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.border-image-width.auto πŸ“‹Safari7/25/2012 Firefox8/28/201234
css.properties.vector-effect πŸ“‹Safari7/20/2011 Firefox8/28/2012405
css.properties.vector-effect.non-scaling-stroke πŸ“‹Safari7/20/2011 Firefox8/28/2012405
css.properties.vector-effect.none πŸ“‹Safari7/20/2011 Firefox8/28/2012405
css.properties.word-break πŸ“‹Safari10/26/2007 Firefox8/28/20121768
Internet Explorer: No version of Internet Explorer supports the initial value.Internet Explorer: Don't use -ms-word-break, which is a synonym for word-break.
css.properties.word-break.break-all πŸ“‹Safari10/26/2007 Firefox8/28/20121768
css.properties.word-break.normal πŸ“‹Safari10/26/2007 Firefox8/28/20121768
html.elements.source.media πŸ“‹Safari3/18/2008 Firefox8/28/20121624
Firefox: media is supported in <source> within <picture>, <audio>, and <video>. In Firefox 53-119, media is supported only in <source> within <picture>.Firefox for Android: media is supported in <source> within <picture>, <audio>, and <video>. In Firefox for Android 53-119, media is supported only in <source> within <picture>.
javascript.builtins.DataView πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.DataView πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.buffer πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.byteLength πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.byteOffset πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getFloat32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getFloat64 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getInt16 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getInt32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getInt8 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getUint16 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getUint32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.getUint8 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setFloat32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setFloat64 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setInt16 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setInt32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setInt8 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setUint16 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setUint32 πŸ“‹Safari7/20/2011 Firefox8/28/2012405
javascript.builtins.DataView.setUint8 πŸ“‹Safari7/20/2011 Firefox8/28/2012405

2012/7

API First Browser Date Last Browser Date Days Notes
api.Blob πŸ“‹Firefox3/22/2011 Safari7/25/2012491
Node.js: Available as a part of the buffer module.Node.js: Available as a part of the buffer module.
api.Blob.Blob πŸ“‹Firefox6/5/2012 Safari7/25/201250
Firefox: Before Firefox 16, the second parameter, when set to null or undefined, leads to an error instead of being handled as an empty dictionary.Firefox for Android: Before Firefox for Android 16, the second parameter, when set to null or undefined, leads to an error instead of being handled as an empty dictionary.Internet Explorer: IE10 throws InvalidStateError with a TypedArray argument. Consider using MSBuilder as an alternative.Node.js: Before v16.7.0, the endings option was not supported.
api.Blob.size πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.Blob.type πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.CSSStyleDeclaration.item πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.CSSStyleDeclaration.length πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.CSSStyleDeclaration.setProperty πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.CloseEvent πŸ“‹Firefox11/8/2011 Safari7/25/2012260
Firefox: Before Firefox 12, the close code CLOSE_NORMAL was used when the channel was closed due to an unexpected error or unspecified error condition.Firefox: Before Firefox 8, the WebSocket close event was sent to the listener as a simple event.
api.CloseEvent.CloseEvent πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.CloseEvent.code πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.CloseEvent.reason πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.CloseEvent.wasClean πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.CustomEvent.CustomEvent πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.Event.Event πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.EventSource.url πŸ“‹Firefox8/16/2011 Safari7/25/2012344
api.FileReader πŸ“‹Firefox1/21/2010 Safari7/25/2012916
Firefox: Before Firefox 4, Blob parameters were File parameters.
api.FileReader.FileReader πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.abort πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.abort_event πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.error πŸ“‹Firefox1/21/2010 Safari7/25/2012916
Firefox: Before Firefox 13, the error property returned a FileError object.Firefox: From Firefox 13 to Firefox 58, the error property returned a DOMError object.Firefox: From Firefox 58, the error property returns a DOMException object.Firefox for Android: From Firefox 32 to Firefox 58, the error property returned a DOMError object.Firefox for Android: From Firefox 58, the error property returns a DOMException object.Internet Explorer: The error property returns a DOMError object.Safari: The error property returns a DOMError object.Safari on iOS: The error property returns a DOMError object.WebView on iOS: The error property returns a DOMError object.
api.FileReader.error_event πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.load_event πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.loadend_event πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.progress_event πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.readAsArrayBuffer πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.readAsBinaryString πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.readAsDataURL πŸ“‹Firefox1/21/2010 Safari7/25/2012916
Firefox for Android: Using the camera in Android 8.x raises an exception. See bug 1511083.
api.FileReader.readAsText πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.readyState πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReader.result πŸ“‹Firefox1/21/2010 Safari7/25/2012916
api.FileReaderSync πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.FileReaderSync πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.readAsArrayBuffer πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.readAsBinaryString πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.readAsDataURL πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.readAsText πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.FileReaderSync.worker_support Firefox11/8/2011 Safari7/25/2012260
api.HTMLElement.accessKey πŸ“‹Firefox6/21/2011 Safari7/25/2012400
api.HTMLElement.click πŸ“‹Firefox6/17/2008 Safari7/25/20121499
Chrome: Before Chrome 19, click() is only defined on buttons and inputs.Chrome Android: Before Chrome Android 25, click() is only defined on buttons and inputs.Firefox: Before Firefox 5, click() is only defined on buttons and inputs, and has no effect on text and file inputs.Firefox: Starting in Firefox 75, the click() function works even when the element is not attached to a DOM tree.Firefox for Android: Before Firefox 5, click() is only defined on buttons and inputs, and has no effect on text and file inputs.Firefox for Android: Starting in Firefox for Android 79, the click() function works even when the element is not attached to a DOM tree.Quest Browser: Before Quest Browser 5.0, click() is only defined on buttons and inputs.Samsung Internet: Before Samsung Internet 1.5, click() is only defined on buttons and inputs.WebView Android: Before WebView Android 4.4, click() is only defined on buttons and inputs.
api.HTMLFieldSetElement.disabled πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLFieldSetElement.name πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLFieldSetElement.type πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLFormElement.autocomplete πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLImageElement.crossOrigin πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.HTMLInputElement.autocomplete πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLInputElement.selectionDirection πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.HTMLMediaElement.defaultMuted πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.HTMLProgressElement πŸ“‹Firefox8/16/2011 Safari7/25/2012344
api.HTMLProgressElement.max πŸ“‹Firefox8/16/2011 Safari7/25/2012344
api.HTMLProgressElement.position πŸ“‹Firefox8/16/2011 Safari7/25/2012344
api.HTMLProgressElement.value πŸ“‹Firefox8/16/2011 Safari7/25/2012344
api.HTMLScriptElement.crossOrigin πŸ“‹Firefox7/17/2012 Safari7/25/20128
api.HTMLSpanElement πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.HTMLTextAreaElement.selectionDirection πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.HTMLTextAreaElement.wrap πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.HTMLUnknownElement πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.HashChangeEvent.HashChangeEvent πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.History.state πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.MutationObserver.disconnect πŸ“‹Firefox7/17/2012 Safari7/25/20128
api.MutationObserver.observe πŸ“‹Firefox7/17/2012 Safari7/25/20128
Chrome: Before Chrome 33, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Chrome throws a syntax error.Chrome Android: Before Chrome Android 33, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Chrome Android throws a syntax error.Edge: Before Edge 79, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Edge throws a syntax error.Firefox: Before Firefox 36, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Firefox throws a syntax error.Firefox for Android: Before Firefox for Android 36, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Firefox for Android throws a syntax error.Internet Explorer: Internet Explorer requires attributes: true when using attributeFilter or attributeOldValue. If attributes: true is not present, then Internet Explorer throws a syntax error.Quest Browser: Before Quest Browser 5.0, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Quest Browser throws a syntax error.Opera: Before Opera 20, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Opera throws a syntax error.Opera Android: Before Opera Android 20, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Opera Android throws a syntax error.Safari: Before Safari 10.1, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Safari throws a syntax error.Safari on iOS: Before Safari iOS 10.3, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Safari throws a syntax error.Samsung Internet: Before Samsung Internet 2.0, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Samsung Internet throws a syntax error.WebView Android: Before WebView 4.4.3, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then WebView throws a syntax error.WebView on iOS: Before Safari iOS 10.3, attributes: true is required when using attributeFilter or attributeOldValue. If attributes: true is not present, then Safari throws a syntax error.
api.MutationObserver.takeRecords πŸ“‹Firefox7/17/2012 Safari7/25/20128
api.PageTransitionEvent.PageTransitionEvent πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.PopStateEvent πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.PopStateEvent.PopStateEvent πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.PopStateEvent.state πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.SVGAnimateMotionElement πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.SVGAnimatedBoolean.animVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGAnimatedBoolean.baseVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGAnimatedInteger.animVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGAnimatedInteger.baseVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGAnimatedNumberList.animVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGAnimatedNumberList.baseVal πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.amplitude πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.exponent πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.intercept πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.offset πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.slope πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.tableValues πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGComponentTransferFunctionElement.type πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGElement.error_event πŸ“‹Firefox11/29/2005 Safari7/25/20122430
api.SVGFEBlendElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.in2 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.mode πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEBlendElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.type πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.values πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEColorMatrixElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEComponentTransferElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEComponentTransferElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.in2 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.k1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.k2 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.k3 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.k4 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.operator πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFECompositeElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.bias πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.divisor πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.edgeMode πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.kernelMatrix πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.orderX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.orderY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.preserveAlpha πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.targetX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.targetY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEConvolveMatrixElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.diffuseConstant πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.surfaceScale πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDiffuseLightingElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.in2 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.scale πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.xChannelSelector πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDisplacementMapElement.yChannelSelector πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDistantLightElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDistantLightElement.azimuth πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEDistantLightElement.elevation πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEFloodElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEFuncAElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEFuncBElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEFuncGElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEFuncRElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEGaussianBlurElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEGaussianBlurElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEGaussianBlurElement.setStdDeviation πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEGaussianBlurElement.stdDeviationX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEGaussianBlurElement.stdDeviationY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.href πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEImageElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeNodeElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMergeNodeElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.operator πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.radiusX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.radiusY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEMorphologyElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.dx πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.dy πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEOffsetElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEPointLightElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEPointLightElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEPointLightElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFEPointLightElement.z πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.specularConstant πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.specularExponent πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.surfaceScale πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpecularLightingElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.limitingConeAngle πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.pointsAtX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.pointsAtY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.pointsAtZ πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.specularExponent πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFESpotLightElement.z πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.in1 πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETileElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.baseFrequencyX πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.baseFrequencyY πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.numOctaves πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.result πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.seed πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.stitchTiles πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.type πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFETurbulenceElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.filterUnits πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.height πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.href πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.primitiveUnits πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.width πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.x πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGFilterElement.y πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGMPathElement πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.SVGMPathElement.href πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.SVGNumberList.appendItem πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.clear πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.getItem πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.initialize πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.insertItemBefore πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.numberOfItems πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.removeItem πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.SVGNumberList.replaceItem πŸ“‹Firefox6/17/2008 Safari7/25/20121499
api.StorageEvent.StorageEvent Firefox6/5/2012 Safari7/25/201250
api.TransitionEvent.elapsedTime πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.TransitionEvent.propertyName πŸ“‹Firefox3/22/2011 Safari7/25/2012491
api.WebSocket.binaryType πŸ“‹Firefox3/13/2012 Safari7/25/2012134
api.WebSocket.extensions πŸ“‹Firefox11/8/2011 Safari7/25/2012260
api.WebSocket.protocol πŸ“‹Firefox9/27/2011 Safari7/25/2012302
api.WebSocket.protocol_rfc_6455 Firefox3/13/2012 Safari7/25/2012134
api.WebSocket.url πŸ“‹Firefox9/27/2011 Safari7/25/2012302
api.XMLHttpRequest.send.body_ArrayBuffer_type Firefox12/20/2011 Safari7/25/2012218
api.XMLHttpRequest.send.body_Blob_type Firefox10/24/2006 Safari7/25/20122101
api.XMLHttpRequest.send.body_FormData_type Firefox10/24/2006 Safari7/25/20122101
css.properties.border-image-width πŸ“‹Firefox6/5/2012 Safari7/25/201250
Chrome: Before Chrome 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Chrome Android: Before Chrome Android 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Edge: Before Edge 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Quest Browser: Before Quest Browser false, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Opera: Before Opera 98, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Opera Android: Before Opera Android 75, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).Samsung Internet: Before Samsung Internet 23.0, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).WebView Android: Before WebView Android 112, a border image's absolute or percentage length width may not take precedence over a narrower border-width (bug 40541033).
css.properties.flood-color πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.flood-color.currentColor πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.flood-color.transparent πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.flood-opacity πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.image-rendering πŸ“‹Firefox1/21/2010 Safari7/25/2012916
css.properties.image-rendering.auto πŸ“‹Firefox1/21/2010 Safari7/25/2012916
css.properties.lighting-color πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.lighting-color.currentColor πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.lighting-color.transparent πŸ“‹Firefox6/17/2008 Safari7/25/20121499
css.properties.text-rendering.geometricPrecision Firefox11/9/2004 Safari7/25/20122815
Chrome: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Chrome Android: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Edge: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Firefox: Firefox treats geometricPrecision the same as optimizeLegibility.Firefox for Android: Firefox treats geometricPrecision the same as optimizeLegibility.Quest Browser: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Opera: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Opera Android: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.Samsung Internet: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.WebView Android: Supports true geometric precision without rounding up or down to the nearest supported font size in the operating system.
css.properties.text-transform.lowercase_sigma Firefox7/17/2012 Safari7/25/20128
css.types.easing-function.cubic-bezier πŸ“‹Firefox3/22/2011 Safari7/25/2012491
html.elements.a.ping πŸ“‹Firefox11/9/2004 Safari7/25/20122815
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
html.elements.area.ping πŸ“‹Firefox11/9/2004 Safari7/25/20122815
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
html.elements.audio.muted πŸ“‹Firefox3/13/2012 Safari7/25/2012134
html.elements.bdi πŸ“‹Firefox1/31/2012 Safari7/25/2012176
html.elements.dfn πŸ“‹Firefox11/9/2004 Safari7/25/20122815
html.elements.fieldset.disabled πŸ“‹Firefox3/22/2011 Safari7/25/2012491
Edge: Does not work with nested fieldsets. For example: <fieldset disabled><fieldset><!--Still enabled--></fieldset></fieldset>Internet Explorer: Not all form control descendants of a disabled fieldset are properly disabled in IE11; see IE bug 817488: input[type='file'] not disabled inside disabled fieldset and IE bug 962368: Can still edit input[type='text'] within fieldset[disabled].
html.elements.fieldset.name πŸ“‹Firefox3/22/2011 Safari7/25/2012491
html.elements.form.autocomplete πŸ“‹Firefox3/22/2011 Safari7/25/2012491
Chrome: The Google Chrome UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Chrome might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Chrome Android: The Chrome Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Chrome Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Quest Browser: The Quest Browser UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Quest Browser might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Opera: The Opera UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Opera might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Opera Android: The Opera Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Opera Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.Samsung Internet: The Samsung Internet UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, Samsung Internet might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.WebView Android: The WebView Android UI for auto-complete request varies, depending on whether autocomplete is set to off on <input> elements as well as their form. Specifically, when a form has autocomplete set to off and its <input> element's autocomplete attribute is not set, then if the user asks for autofill suggestions for the <input> element, WebView Android might display a message saying 'autocomplete has been disabled for this form.' On the other hand, if both the form and the input element have autocomplete set to off, the browser will not display that message. For this reason, you should set autocomplete to off for each <input> that has custom auto-completion.
html.elements.img.crossorigin πŸ“‹Firefox11/8/2011 Safari7/25/2012260
html.elements.input.autocomplete πŸ“‹Firefox3/22/2011 Safari7/25/2012491
html.elements.progress πŸ“‹Firefox8/16/2011 Safari7/25/2012344
Firefox: Before Firefox 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed.Firefox: Firefox provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.Firefox for Android: Before Firefox for Android 14, the <progress> element was incorrectly classified as a form element, and therefore had a form attribute. This has been fixed.Firefox for Android: Firefox for Android provides the ::-moz-progress-bar pseudo-element, which lets you style the part of the interior of the progress bar representing the amount of work completed so far.Safari on iOS: Safari on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).WebView on iOS: WebView on iOS does not support indeterminate progress bars (they are rendered like 0%-completed progress bars).
html.elements.progress.max πŸ“‹Firefox8/16/2011 Safari7/25/2012344
html.elements.progress.value πŸ“‹Firefox8/16/2011 Safari7/25/2012344
html.elements.script.crossorigin πŸ“‹Firefox7/17/2012 Safari7/25/20128
Safari: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.Safari on iOS: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.WebView on iOS: The crossorigin attribute was implemented in WebKit in WebKit bug 81438.
html.elements.textarea.wrap πŸ“‹Firefox3/22/2011 Safari7/25/2012491
http.headers.Sec-WebSocket-Accept πŸ“‹Firefox3/13/2012 Safari7/25/2012134
http.headers.Sec-WebSocket-Extensions πŸ“‹Firefox3/13/2012 Safari7/25/2012134
http.headers.Sec-WebSocket-Key πŸ“‹Firefox3/13/2012 Safari7/25/2012134
http.headers.Sec-WebSocket-Protocol πŸ“‹Firefox3/13/2012 Safari7/25/2012134
http.headers.Sec-WebSocket-Version πŸ“‹Firefox3/13/2012 Safari7/25/2012134
javascript.builtins.Error.stack Firefox11/9/2004 Safari7/25/20122815
javascript.builtins.Function.apply.generic_arrays_as_arguments Firefox3/22/2011 Safari7/25/2012491
javascript.builtins.Function.name πŸ“‹Firefox11/9/2004 Safari7/25/20122815
api.HTMLImageElement.x πŸ“‹Safari10/26/2007 Firefox7/17/20121726
api.HTMLImageElement.y πŸ“‹Safari10/26/2007 Firefox7/17/20121726

2012/6

API First Browser Date Last Browser Date Days Notes
api.StorageEvent πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.initStorageEvent πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.key πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.newValue πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.oldValue πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.storageArea πŸ“‹Safari6/8/2009 Firefox6/5/20121093
api.StorageEvent.url πŸ“‹Safari6/7/2010 Firefox6/5/2012729
css.properties.background-repeat.2-value Safari6/7/2010 Firefox6/5/2012729
css.types.angle.turn Safari6/8/2009 Firefox6/5/20121093

2012/4

API First Browser Date Last Browser Date Days Notes
api.Document.createTreeWalker.whatToShow_filter_parameters_optional Safari10/26/2007 Firefox4/24/20121642
api.SVGAnimationElement.requiredExtensions πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGAnimationElement.systemLanguage πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGGraphicsElement.requiredExtensions πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGGraphicsElement.systemLanguage πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList πŸ“‹Safari10/26/2007 Firefox4/24/20121642
Firefox: Since version 13, SVGStringList is indexable like Array which is a non-standard behavior.Firefox for Android: SVGStringList is indexable like Array which is a non-standard behavior.
api.SVGStringList.appendItem πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.clear πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.getItem πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.initialize πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.insertItemBefore πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.numberOfItems πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.removeItem πŸ“‹Safari10/26/2007 Firefox4/24/20121642
api.SVGStringList.replaceItem πŸ“‹Safari10/26/2007 Firefox4/24/20121642
javascript.builtins.ArrayBuffer.slice πŸ“‹Safari7/20/2011 Firefox4/24/2012279
Firefox: The non-standard ArrayBuffer.slice() method has been removed in Firefox 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.Firefox for Android: The non-standard ArrayBuffer.slice() method has been removed in Firefox for Android 53 (but the standardized version ArrayBuffer.prototype.slice() is kept.

2012/3

API First Browser Date Last Browser Date Days Notes
api.Element.outerHTML πŸ“‹Safari4/15/2005 Firefox3/13/20122524
api.HTMLMediaElement.loop πŸ“‹Safari6/8/2009 Firefox3/13/20121009
api.PageTransitionEvent.persisted πŸ“‹Safari6/7/2010 Firefox3/13/2012645
Internet Explorer: The persisted property is known to be buggy in Internet Explorer. It is advised to check if window.performance.navigation.type == 2 as well.
api.WebSocket πŸ“‹Safari6/7/2010 Firefox3/13/2012645
Firefox: Message size limited to 16 MB (see bug 711205).Firefox for Android: Message size limited to 16 MB (see bug 711205).
api.WebSocket.WebSocket πŸ“‹Safari6/7/2010 Firefox3/13/2012645
html.elements.audio.loop πŸ“‹Safari3/18/2008 Firefox3/13/20121456
html.elements.video.loop πŸ“‹Safari3/18/2008 Firefox3/13/20121456
html.elements.video.muted πŸ“‹Safari6/7/2010 Firefox3/13/2012645

2012/1

API First Browser Date Last Browser Date Days Notes
api.DOMParser.parseFromString.svg Safari10/26/2007 Firefox1/31/20121558
api.Event.stopImmediatePropagation πŸ“‹Safari6/7/2010 Firefox1/31/2012603
api.console.timeEnd_static πŸ“‹Safari6/8/2009 Firefox1/31/2012967
api.console.time_static πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.backface-visibility.hidden πŸ“‹Safari7/20/2011 Firefox1/31/2012195
css.properties.backface-visibility.visible πŸ“‹Safari7/20/2011 Firefox1/31/2012195
css.properties.perspective.none πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.perspective-origin.bottom πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.perspective-origin.center πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.perspective-origin.left πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.perspective-origin.right πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.perspective-origin.top πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.transform-origin.three_value_syntax Safari6/7/2010 Firefox1/31/2012603
css.properties.transform-style.flat πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.properties.transform-style.preserve-3d πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.matrix3d πŸ“‹Safari6/8/2009 Firefox1/31/2012967
Firefox: Before Firefox 16, the translation values of matrix3d() could be <length>s, in addition to the standard <number>.
css.types.transform-function.perspective πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.rotate3d πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.rotateX πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.rotateY πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.rotateZ πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.scale3d πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.scaleZ πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.translate3d πŸ“‹Safari6/8/2009 Firefox1/31/2012967
css.types.transform-function.translateZ πŸ“‹Safari6/8/2009 Firefox1/31/2012967
html.elements.a.href.href_top Safari6/8/2009 Firefox1/31/2012967
html.elements.bdo πŸ“‹Safari6/8/2009 Firefox1/31/2012967

2011/12

API First Browser Date Last Browser Date Days Notes
api.CompositionEvent πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.CompositionEvent.data πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.CompositionEvent.initCompositionEvent πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.Element.compositionend_event πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.Element.compositionstart_event πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.Element.compositionupdate_event πŸ“‹Safari6/7/2010 Firefox12/20/2011561
api.HTMLElement.drag_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
Firefox: The drag event handler receives a DragEvent whose coordinate properties (clientX/clientY, pageX/pageY, screenX/screenY) are always 0. See bug 505521.Firefox for Android: The drag event handler receives a DragEvent whose coordinate properties (clientX/clientY, pageX/pageY, screenX/screenY) are always 0. See bug 505521.
api.HTMLElement.dragend_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLElement.dragenter_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLElement.dragleave_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLElement.dragover_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLElement.dragstart_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLElement.drop_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.HTMLMediaElement.abort_event πŸ“‹Safari3/18/2008 Firefox12/20/20111372
api.Node.contains πŸ“‹Safari10/24/2003 Firefox12/20/20112979
Internet Explorer: Only supported for HTMLElement, not all Node objects.
api.Node.ownerDocument πŸ“‹Safari6/23/2003 Firefox12/20/20113102
Firefox: The ownerDocument of doctype nodes (that is, nodes for which Node.nodeType is Node.DOCUMENT_TYPE_NODE or 10) is null.Firefox for Android: The ownerDocument of doctype nodes (that is, nodes for which Node.nodeType is Node.DOCUMENT_TYPE_NODE or 10) is null.
api.Node.parentElement πŸ“‹Safari10/24/2003 Firefox12/20/20112979
Internet Explorer: Only supported on Element.Opera: Before Opera 15, this feature was only supported on Element.Opera Android: Before Opera Android 14, this feature was only supported on Element.
api.Window.message_event πŸ“‹Safari6/8/2009 Firefox12/20/2011925
api.Window.offline_event πŸ“‹Safari6/8/2009 Firefox12/20/2011925
api.Window.online_event πŸ“‹Safari6/8/2009 Firefox12/20/2011925
api.console.groupCollapsed_static πŸ“‹Safari7/20/2011 Firefox12/20/2011153
Node.js: Alias for console.group
api.console.groupEnd_static πŸ“‹Safari6/8/2009 Firefox12/20/2011925
api.console.group_static πŸ“‹Safari6/8/2009 Firefox12/20/2011925
api.console.substitution_strings Safari10/26/2007 Firefox12/20/20111516
Chrome: In version 28, if a negative value is passed to %d, it will be rounded down to the closest negative integer, so -0.1 becomes -1.Chrome Android: In version 28, if a negative value is passed to %d, it will be rounded down to the closest negative integer, so -0.1 becomes -1.Deno: Before Deno 1.4, %c is not supported.Deno: %c only supports CSS properties color, background-color, font-weight, font-style, text-decoration-color, and text-decoration-line.Edge: Before Edge 79, %c is not supported.Edge: Before Edge 79, %d outputs a 0 if the specified value isn't a number.Internet Explorer: %c is not supported.Internet Explorer: %d outputs a 0 if the specified value isn't a number.Quest Browser: In version 5.0, if a negative value is passed to %d, it will be rounded down to the closest negative integer, so -0.1 becomes -1.Samsung Internet: In Samsung Internet 1.5, if a negative value is passed to %d, it will be rounded down to the closest negative integer, so -0.1 becomes -1.WebView Android: In version 4.4, if a negative value is passed to %d, it will be rounded down to the closest negative integer, so -0.1 becomes -1.
css.properties.background.background-size Safari7/20/2011 Firefox12/20/2011153
css.properties.columns.auto πŸ“‹Safari10/26/2007 Firefox12/20/20111516
css.properties.hyphens.language_italian Safari7/20/2011 Firefox12/20/2011153
css.properties.hyphens.language_turkish Safari7/20/2011 Firefox12/20/2011153

2011/11

API First Browser Date Last Browser Date Days Notes
api.Element.insertAdjacentHTML πŸ“‹Safari6/8/2009 Firefox11/8/2011883
Edge: Only supported for HTMLElement, not all Element objects, such as SVGElement.Internet Explorer: Before Internet Explorer 10, throws an "Invalid target element for this operation." error when called on a <table>, <tbody>, <thead>, or <tr> element.Internet Explorer: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.HTMLMediaElement.seekable πŸ“‹Safari3/18/2008 Firefox11/8/20111330
api.console.dir_static πŸ“‹Safari6/8/2009 Firefox11/8/2011883
css.properties.hyphens.language_catalan Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_danish Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_dutch Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_french Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_german_reformed_orthography Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_norwegian_no Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_russian Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_spanish Safari7/20/2011 Firefox11/8/2011111
css.properties.hyphens.language_swedish Safari7/20/2011 Firefox11/8/2011111

2011/9

API First Browser Date Last Browser Date Days Notes
api.File πŸ“‹Safari6/8/2009 Firefox9/27/2011841
Firefox: Non-standard implementation.Firefox for Android: Non-standard implementation.Node.js: Before 23.0.0, File instance cannot be cloned.Node.js: Available as a part of the buffer module.Node.js: Available as a part of the buffer module.
api.HTMLOptionElement.label πŸ“‹Safari10/26/2007 Firefox9/27/20111432
Firefox: Before Firefox 7 the label property incorrectly returned an empty string if not defined instead of returning the element's text content.Firefox for Android: Before Firefox for Android 7 the label property incorrectly returned an empty string if not defined instead of returning the element's text content.
api.WebSocket.bufferedAmount πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.close πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.close_event πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.error_event πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.message_event πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.open_event πŸ“‹Safari6/7/2010 Firefox9/27/2011477
api.WebSocket.readyState πŸ“‹Safari6/7/2010 Firefox9/27/2011477
css.properties.text-overflow πŸ“‹Safari4/15/2005 Firefox9/27/20112356
Firefox: Until Firefox 10, handling of text-overflow on blocks with inline overflow on both horizontal sides was incorrect. Before Firefox 10, if only one value was specified (such as text-overflow: ellipsis;), text was ellipsed on both sides of the block, instead of only the end edge based on the block's text direction.Firefox for Android: Until Firefox for Android 10, handling of text-overflow on blocks with inline overflow on both horizontal sides was incorrect. Before Firefox for Android 10, if only one value was specified (such as text-overflow: ellipsis;), text was ellipsed on both sides of the block, instead of only the end edge based on the block's text direction.
css.properties.text-overflow.clip πŸ“‹Safari4/15/2005 Firefox9/27/20112356
css.properties.text-overflow.ellipsis πŸ“‹Safari4/15/2005 Firefox9/27/20112356

2011/8

API First Browser Date Last Browser Date Days Notes
api.CustomEvent πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.CustomEvent.detail πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.CustomEvent.initCustomEvent πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.DOMStringMap πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.Document.scroll_event πŸ“‹Safari4/29/2005 Firefox8/16/20112300
api.Element.click_event πŸ“‹Safari10/26/2007 Firefox8/16/20111390
Firefox: Beginning in Firefox 68, Firefox no longer incorrectly sends a click event for buttons other than the primary mouse button; previously, there were circumstances in which this would occur. One example: middle-clicking a link would send a click to the document's <html> element.
api.Element.contextmenu_event πŸ“‹Safari10/26/2007 Firefox8/16/20111390
api.Element.dblclick_event πŸ“‹Safari10/26/2007 Firefox8/16/20111390
Firefox: Starting in Firefox 68, dblclick events are only sent for the primary mouse button, per the specification.
api.Element.input_event πŸ“‹Safari3/18/2008 Firefox8/16/20111246
Edge: Not supported on select, checkbox, or radio inputs.Internet Explorer: Only supports input of type text and password.
api.Element.keydown_event πŸ“‹Safari2/2/2004 Firefox8/16/20112752
api.Element.keypress_event πŸ“‹Safari4/15/2005 Firefox8/16/20112314
Chrome: Chrome does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.Chrome Android: Chrome Android does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.Firefox: As of Firefox 65, the keypress event is no longer fired for non-printable keys, except for the Enter key, and the Shift + Enter and Ctrl + Enter key combinations (these were kept for cross-browser compatibility purposes).Firefox for Android: As of Firefox for Android 65, the keypress event is no longer fired for non-printable keys, except for the Enter key, and the Shift + Enter and Ctrl + Enter key combinations (these were kept for cross-browser compatibility purposes).Quest Browser: Quest Browser does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.Opera: Opera does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.Opera Android: Opera does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.Samsung Internet: Samsung Internet does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.WebView Android: Chrome does not fire the keypress event for known keyboard shortcuts. Which keyboard shortcuts are known depends on the user's system. Use the keydown event to implement keyboard shortcuts.
api.Element.keyup_event πŸ“‹Safari2/2/2004 Firefox8/16/20112752
api.Element.mousedown_event πŸ“‹Safari6/8/2009 Firefox8/16/2011799
api.Element.mousemove_event πŸ“‹Safari6/8/2009 Firefox8/16/2011799
api.Element.mouseout_event πŸ“‹Safari6/23/2003 Firefox8/16/20112976
api.Element.mouseover_event πŸ“‹Safari6/8/2009 Firefox8/16/2011799
api.Element.mouseup_event πŸ“‹Safari6/8/2009 Firefox8/16/2011799
api.Element.scroll_event πŸ“‹Safari4/15/2005 Firefox8/16/20112314
api.Event.defaultPrevented πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.EventSource πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.close πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.error_event πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.message_event πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.open_event πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventSource.readyState πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.EventTarget.addEventListener.useCapture_parameter_optional Safari6/23/2003 Firefox8/16/20112976
api.EventTarget.removeEventListener.useCapture_parameter_optional Safari6/23/2003 Firefox8/16/20112976
api.HTMLElement.dataset πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.HTMLFormElement.reset_event πŸ“‹Safari10/26/2007 Firefox8/16/20111390
api.HTMLInputElement.select_event πŸ“‹Safari6/23/2003 Firefox8/16/20112976
api.HTMLMediaElement.error_event πŸ“‹Safari3/18/2008 Firefox8/16/20111246
api.HTMLMediaElement.loadstart_event πŸ“‹Safari6/8/2009 Firefox8/16/2011799
api.HTMLMediaElement.progress_event πŸ“‹Safari3/18/2008 Firefox8/16/20111246
api.HTMLMediaElement.volumechange_event πŸ“‹Safari3/18/2008 Firefox8/16/20111246
api.HTMLMediaElement.waiting_event πŸ“‹Safari3/18/2008 Firefox8/16/20111246
api.HTMLTextAreaElement.select_event πŸ“‹Safari6/23/2003 Firefox8/16/20112976
api.HashChangeEvent.newURL πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.HashChangeEvent.oldURL πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.MediaQueryList πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.MediaQueryList.addListener πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.MediaQueryList.matches πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.MediaQueryList.media πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.MediaQueryList.removeListener πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.Window.blur_event πŸ“‹Safari7/20/2011 Firefox8/16/201127
Firefox: Apart from firing the event on window as other browsers do, Firefox also fires the event on the document object. See bug 1228802.Firefox: Before Firefox 24, the interface for this event is a plain Event, not FocusEvent.Firefox for Android: Apart from firing the event on window as other browsers do, Firefox for Android also fires the event on the document object. See bug 1228802.Firefox for Android: Before Firefox for Android 24, the interface for this event is a plain Event, not FocusEvent.
api.Window.error_event πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.Window.focus_event πŸ“‹Safari7/20/2011 Firefox8/16/201127
Firefox: Apart from firing the event on window as other browsers do, Firefox also fires the event on the document object. See bug 1228802.Firefox: Before Firefox 24, the interface for this event is a plain Event, not FocusEvent.Firefox for Android: Apart from firing the event on window as other browsers do, Firefox for Android also fires the event on the document object. See bug 1228802.Firefox for Android: Before Firefox for Android 24, the interface for this event is a plain Event, not FocusEvent.
api.Window.matchMedia πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.Window.pagehide_event πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.Window.pageshow_event πŸ“‹Safari6/7/2010 Firefox8/16/2011435
api.XMLHttpRequest.response πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.XMLHttpRequest.responseType πŸ“‹Safari7/20/2011 Firefox8/16/201127
api.XMLHttpRequest.responseType.arraybuffer_value Safari7/20/2011 Firefox8/16/201127
api.XMLHttpRequest.responseType.blob_value Safari7/20/2011 Firefox8/16/201127
api.console.trace_static πŸ“‹Safari6/8/2009 Firefox8/16/2011799
css.properties.hyphens.auto Safari7/20/2011 Firefox8/16/201127
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.properties.hyphens.language_english Safari7/20/2011 Firefox8/16/201127
Firefox: For English, Firefox uses an en-US dictionaryFirefox for Android: For English, Firefox for Android uses an en-US dictionarySafari: For English, Safari uses different en-GB and en-US dictionaries.Safari on iOS: For English, Safari on iOS uses different en-GB and en-US dictionaries.WebView on iOS: For English, WebView on iOS uses different en-GB and en-US dictionaries.
css.properties.hyphens.manual Safari7/20/2011 Firefox8/16/201127
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.properties.hyphens.none Safari7/20/2011 Firefox8/16/201127
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.selectors.indeterminate.progress Safari7/20/2011 Firefox8/16/201127
html.global_attributes.data_attributes πŸ“‹Safari7/20/2011 Firefox8/16/201127
http.headers.Upgrade πŸ“‹Safari6/7/2010 Firefox8/16/2011435

2011/7

API First Browser Date Last Browser Date Days Notes
api.DOMStringList πŸ“‹Firefox11/9/2004 Safari7/20/20112444
api.DOMStringList.contains πŸ“‹Firefox11/29/2005 Safari7/20/20112059
api.DOMStringList.item πŸ“‹Firefox11/9/2004 Safari7/20/20112444
api.DOMStringList.length πŸ“‹Firefox11/9/2004 Safari7/20/20112444
api.DOMTokenList πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.add πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.contains πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.item πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.length πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.remove πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.toString πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.DOMTokenList.toggle πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.Document.readystatechange_event πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLAnchorElement.ping πŸ“‹Firefox11/9/2004 Safari7/20/20112444
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
api.HTMLAreaElement.ping πŸ“‹Firefox11/9/2004 Safari7/20/20112444
Firefox: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.Firefox for Android: This property is exposed but has no effect if the browser.send_pings preference is not set to true. See bug 951104.
api.HTMLButtonElement.formAction πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Firefox: In Firefox 56, the implementation has been updated so that the formAction property returns the correct form submission URL, as per spec, when the associated button is being used to submit a form (bug 1366361).Firefox for Android: In Firefox for Android 56, the implementation has been updated so that the formAction property returns the correct form submission URL, as per spec, when the associated button is being used to submit a form (bug 1366361).
api.HTMLButtonElement.formEnctype πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLButtonElement.formMethod πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLButtonElement.formTarget πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLCanvasElement.webglcontextlost_event πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLCanvasElement.webglcontextrestored_event πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLElement.hidden πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLElement.spellcheck πŸ“‹Firefox10/24/2006 Safari7/20/20111730
api.HTMLLabelElement.control πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLObjectElement.checkValidity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLObjectElement.setCustomValidity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLObjectElement.validationMessage πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLObjectElement.validity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.checkValidity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.defaultValue πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.form πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.htmlFor πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Chrome: Before Chrome 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Chrome Android: Before Chrome Android 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Quest Browser: Before Quest Browser 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera: Before Opera 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Opera Android: Before Opera Android 37, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.Samsung Internet: Before Samsung Internet 5.0, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.WebView Android: Before Chrome 50, this property returned the deprecated child DOMSettableTokenList instead of DOMTokenList.
api.HTMLOutputElement.name πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.setCustomValidity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLOutputElement.type πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.validationMessage πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.validity πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.value πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLOutputElement.willValidate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.HTMLScriptElement.async πŸ“‹Firefox1/21/2010 Safari7/20/2011545
api.HTMLSelectElement.required πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.SVGSVGElement.getElementById πŸ“‹Firefox11/29/2005 Safari7/20/20112059
api.WebGLActiveInfo πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLActiveInfo.name πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLActiveInfo.size πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLActiveInfo.type πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLFramebuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Edge: To access the WebGL context, use experimental-webgl rather than the standard webgl identifier.Internet Explorer: To access the WebGL context, use experimental-webgl rather than the standard webgl identifier.
api.WebGLRenderingContext.activeTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.attachShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bindAttribLocation πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bindBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bindFramebuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bindRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bindTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.blendColor πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.blendEquation πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.blendEquationSeparate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.blendFunc πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.blendFuncSeparate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bufferData πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.bufferSubData πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.canvas πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.checkFramebufferStatus πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.clear πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.clearColor πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.clearDepth πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.clearStencil πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.colorMask πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.compileShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.compressedTexImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.compressedTexSubImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.copyTexImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.copyTexSubImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createFramebuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.createTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.cullFace πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteFramebuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.deleteTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.depthFunc πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.depthMask πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.depthRange πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.detachShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.disable πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.disableVertexAttribArray πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.drawArrays πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.drawElements πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.drawingBufferHeight πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.drawingBufferWidth πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.enable πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.enableVertexAttribArray πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.finish πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.flush πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.framebufferRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.framebufferTexture2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.frontFace πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.generateMipmap πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getActiveAttrib πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getActiveUniform πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getAttachedShaders πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getAttribLocation πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getBufferParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getContextAttributes πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getError πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getExtension πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getFramebufferAttachmentParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getProgramInfoLog πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getProgramParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getRenderbufferParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getShaderInfoLog πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getShaderParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getShaderPrecisionFormat πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getShaderSource πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getSupportedExtensions πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getTexParameter πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getUniform πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getUniformLocation πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getVertexAttrib πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.getVertexAttribOffset πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.hint πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isContextLost πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isEnabled πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isFramebuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isRenderbuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.isTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.lineWidth πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.linkProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.pixelStorei πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.polygonOffset πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.readPixels πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.renderbufferStorage πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.sampleCoverage πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.scissor πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.shaderSource πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilFunc πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilFuncSeparate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilMask πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilMaskSeparate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilOp πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.stencilOpSeparate πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.texImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGLRenderingContext.texParameterf πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.texParameteri πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.texSubImage2D πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGLRenderingContext.uniform1f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform1fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform1i πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform1iv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform2f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform2fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform2i πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform2iv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform3f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform3fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform3i πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform3iv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform4f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform4fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform4i πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniform4iv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniformMatrix2fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniformMatrix3fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.uniformMatrix4fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.useProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.validateProgram πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib1f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib1fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib2f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib2fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib3f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib3fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib4f πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttrib4fv πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.vertexAttribPointer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLRenderingContext.viewport πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLShader πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLShaderPrecisionFormat πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLShaderPrecisionFormat.precision πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLShaderPrecisionFormat.rangeMax πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLShaderPrecisionFormat.rangeMin πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLTexture πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.WebGLUniformLocation πŸ“‹Firefox3/22/2011 Safari7/20/2011120
api.Window.getComputedStyle.pseudo_element_support Firefox6/30/2009 Safari7/20/2011750
css.at-rules.font-face.WOFF πŸ“‹Firefox6/30/2009 Safari7/20/2011750
css.properties.border-radius.percentages Firefox3/22/2011 Safari7/20/2011120
Firefox: Before Firefox 4, <percentage> values are implemented in a non-standard way. Both horizontal and vertical radii were relative to the width of the border box.Opera: Before Opera 11.5, the implementation of <percentage> values was buggy.
css.properties.box-shadow πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Chrome: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Chrome Android: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Firefox: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Firefox for Android: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Internet Explorer: To use box-shadow in Internet Explorer 9 or later, you must set border-collapse to separate.Internet Explorer: Since version 5.5, Internet Explorer supports Microsoft's DropShadow and Shadow Filter. You can use this proprietary extension to cast a drop shadow (though the syntax and the effect are different from CSS3)Quest Browser: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Opera: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Opera Android: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Safari: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Safari on iOS: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.Samsung Internet: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.WebView Android: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.WebView on iOS: Shadows affect layout in this browser. For example, if you cast an outer shadow to a box with a width of 100%, then you'll see a scrollbar.
css.types.easing-function.steps πŸ“‹Firefox3/22/2011 Safari7/20/2011120
html.elements.button.form Firefox3/22/2011 Safari7/20/2011120
html.elements.button.formaction Firefox3/22/2011 Safari7/20/2011120
html.elements.button.formenctype Firefox3/22/2011 Safari7/20/2011120
html.elements.button.formmethod Firefox3/22/2011 Safari7/20/2011120
html.elements.button.formnovalidate Firefox3/22/2011 Safari7/20/2011120
html.elements.button.formtarget Firefox3/22/2011 Safari7/20/2011120
html.elements.figcaption πŸ“‹Firefox3/22/2011 Safari7/20/2011120
html.elements.figure πŸ“‹Firefox3/22/2011 Safari7/20/2011120
html.elements.mark πŸ“‹Firefox3/22/2011 Safari7/20/2011120
html.elements.select.required πŸ“‹Firefox3/22/2011 Safari7/20/2011120
html.global_attributes.hidden πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Safari: This attribute has no effect on <option> elements.Safari on iOS: This attribute has no effect on <option> elements.WebView on iOS: This attribute has no effect on <option> elements.
html.global_attributes.spellcheck πŸ“‹Firefox10/24/2006 Safari7/20/20111730
Chrome Android: Only supported on <textarea>.Firefox for Android: Only supported on <textarea>.Opera Android: Only supported on <textarea>.Safari on iOS: Only supported on <textarea>.Samsung Internet: Only supported on <textarea>.WebView Android: Only supported on <textarea>.WebView on iOS: Only supported on <textarea>.
javascript.builtins.ArrayBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.ArrayBuffer.ArrayBuffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.ArrayBuffer.byteLength πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Date.parse.iso_8601 Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Float32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Float32Array.Float32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Float64Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Float64Array.Float64Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Function.bind πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int16Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int16Array.Int16Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int32Array.Int32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int8Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Int8Array.Int8Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.defineProperty πŸ“‹Firefox3/22/2011 Safari7/20/2011120
Internet Explorer: In Internet Explorer 8, this was only supported on DOM objects and with some non-standard behaviors. This was later fixed in Internet Explorer 9.Safari: Also supported in Safari 5, but not on DOM objects.Safari on iOS: Also supported in Safari for iOS 4.2, but not on DOM objects.WebView on iOS: Also supported in Safari for iOS 4.2, but not on DOM objects.
javascript.builtins.Object.freeze πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.isExtensible πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.isFrozen πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.isSealed πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.preventExtensions πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Object.seal πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.BYTES_PER_ELEMENT πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.buffer πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.byteLength πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.byteOffset πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.length πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.name πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.set πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.TypedArray.subarray πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint16Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint16Array.Uint16Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint32Array.Uint32Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint8Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint8Array.Uint8Array πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint8ClampedArray πŸ“‹Firefox3/22/2011 Safari7/20/2011120
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray πŸ“‹Firefox3/22/2011 Safari7/20/2011120

2011/6

API First Browser Date Last Browser Date Days Notes
api.CSSKeyframeRule.keyText πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.CSSKeyframeRule.style πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.CSSKeyframesRule.cssRules πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.CSSKeyframesRule.deleteRule πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.CSSKeyframesRule.findRule πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.CSSKeyframesRule.name πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.XMLHttpRequest.loadend_event πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.XMLHttpRequestUpload.loadend_event πŸ“‹Safari6/8/2009 Firefox6/21/2011743
api.console.debug_static πŸ“‹Safari6/8/2009 Firefox6/21/2011743
Node.js: Since Node.js 8.10.0, this method is an alias for console.log.
css.properties.animation.alternate πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.alternate-reverse πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.auto πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.backwards πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.both πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.ease πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.ease-in πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.ease-in-out πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.ease-out πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.forwards πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.infinite πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.linear πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.none πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.normal πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.paused πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.reverse πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.running πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.step-end πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation.step-start πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-direction.alternate πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-direction.normal πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-fill-mode.backwards πŸ“‹Safari6/7/2010 Firefox6/21/2011379
css.properties.animation-fill-mode.both πŸ“‹Safari6/7/2010 Firefox6/21/2011379
css.properties.animation-fill-mode.forwards πŸ“‹Safari6/7/2010 Firefox6/21/2011379
css.properties.animation-fill-mode.none πŸ“‹Safari6/7/2010 Firefox6/21/2011379
css.properties.animation-iteration-count.infinite πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-name.none πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-play-state.paused πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-play-state.running πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.ease πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.ease-in πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.ease-in-out πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.ease-out πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.linear πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.step-end πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.animation-timing-function.step-start πŸ“‹Safari6/8/2009 Firefox6/21/2011743
css.properties.resize.block_level_support Safari6/8/2009 Firefox6/21/2011743
Firefox: resize doesn't have any effect on <iframe>. See bug 680823)

2011/3

API First Browser Date Last Browser Date Days Notes
api.DOMImplementation.createHTMLDocument πŸ“‹Safari6/23/2003 Firefox3/22/20112829
Internet Explorer: The title parameter is required, but can be empty string.
api.FormData πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 7, specifying a Blob as the data to append to the object, the filename reported in the Content-Disposition HTTP header was an empty string, resulting in errors on some servers. Starting with Firefox 7, the filename blob is sent.Firefox for Android: Before Firefox for Android 7, specifying a Blob as the data to append to the object, the filename reported in the Content-Disposition HTTP header was an empty string, resulting in errors on some servers. Starting with Firefox for Android 7, the filename blob is sent.WebView Android: XHR in Android 4.0 sends empty content for FormData with blob.
api.FormData.FormData πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.FormData.append πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 7, specifying a Blob as the data to append to the object, the filename reported in the Content-Disposition HTTP header was an empty string, resulting in errors on some servers. Starting with Firefox 7, the filename blob is sent.Firefox for Android: Before Firefox for Android 7, specifying a Blob as the data to append to the object, the filename reported in the Content-Disposition HTTP header was an empty string, resulting in errors on some servers. Starting with Firefox for Android 7, the filename blob is sent.Internet Explorer: With the "Include local directory pass when uploading files to a server" option enabled, IE will change the filename inside the Blob on the fly. To have direct control of the sent filename, the developer should send the filename as the third parameter value, i.e. formData.append(name, value, filename).WebView Android: XHR in Android 4.0 sends empty content for FormData with blob.
api.HTMLButtonElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLButtonElement.formNoValidate πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLButtonElement.setCustomValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLButtonElement.validationMessage πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLButtonElement.validity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLButtonElement.willValidate πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.HTMLElement.isContentEditable πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.HTMLFieldSetElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLFieldSetElement.setCustomValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLFieldSetElement.validationMessage πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLFieldSetElement.validity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLFieldSetElement.willValidate πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.HTMLFormElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLFormElement.noValidate πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.formAction πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.formEnctype πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.formMethod πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.formNoValidate πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.formTarget πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.invalid_event πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.pattern πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.placeholder πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.HTMLInputElement.required πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.setCustomValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLInputElement.validationMessage πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.validity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLInputElement.willValidate πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.HTMLMediaElement.buffered πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.HTMLMediaElement.preload πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLObjectElement.willValidate πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLOptionsCollection.remove πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.HTMLSelectElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLSelectElement.setCustomValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLSelectElement.validationMessage πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLSelectElement.validity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLSelectElement.willValidate πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.HTMLTextAreaElement.checkValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.maxLength πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.placeholder πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.required πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.setCustomValidity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Chrome Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Quest Browser: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.Samsung Internet: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.WebView Android: This method only updates the validation error popup, not the tooltip that appears when hovering the mouse over the element, see bug 41380670.
api.HTMLTextAreaElement.validationMessage πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.validity πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.HTMLTextAreaElement.willValidate πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.History.pushState πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Until Firefox 5, the passed object is serialized using JSON. Starting in Firefox 6, the object is serialized using the structured clone algorithm. This allows a wider variety of objects to be safely passed.Firefox for Android: Until Firefox for Android 5, the passed object is serialized using JSON. Starting in Firefox for Android 6, the object is serialized using the structured clone algorithm. This allows a wider variety of objects to be safely passed.
api.History.replaceState πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Until Firefox 5, the passed object is serialized using JSON. Starting in Firefox 6, the object is serialized using the structured clone algorithm. This allows a wider variety of objects to be safely passed.Firefox for Android: Until Firefox for Android 5, the passed object is serialized using JSON. Starting in Firefox for Android 6, the object is serialized using the structured clone algorithm. This allows a wider variety of objects to be safely passed.
api.MediaError πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.Range.getBoundingClientRect πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.Range.getClientRects πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.SVGAElement.href πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.SVGAnimateElement πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.SVGAnimateTransformElement πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.SVGAnimationElement πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.SVGAnimationElement.beginElement πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.beginElementAt πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.endElement πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.endElementAt πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.getCurrentTime πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.getSimpleDuration πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.getStartTime πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGAnimationElement.targetElement πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.SVGElement.load_event πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Firefox: See bug 620002 for implementation status of the standard load event.Firefox for Android: See bug 620002 for implementation status of the standard load event.
api.SVGSetElement πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.Selection.modify πŸ“‹Safari4/15/2005 Firefox3/22/20112167
api.TimeRanges πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.TimeRanges.end πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.TimeRanges.length πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.TimeRanges.start πŸ“‹Safari3/18/2008 Firefox3/22/20111099
api.TreeWalker πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.currentNode πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.filter πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.firstChild πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.lastChild πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.nextNode πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.nextSibling πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.parentNode πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.previousNode πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.previousSibling πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.root πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.TreeWalker.whatToShow πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.ValidityState πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.customError πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.patternMismatch πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.rangeOverflow πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.rangeUnderflow πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.stepMismatch πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.tooLong πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Edge: Not supported in the unlikely case of the value being initially set too long, and then changed by the user to a still incorrect state. Per caniuse.com.Firefox: Not supported in the unlikely case of the value being initially set too long, and then changed by the user to a still incorrect state. Per caniuse.com.
api.ValidityState.typeMismatch πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.valid πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.ValidityState.valueMissing πŸ“‹Safari6/7/2010 Firefox3/22/2011288
api.Window.popstate_event πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: Before version 34, Chrome would fire a popstate event on page load.Chrome Android: Before version 34, Chrome Android would fire a popstate event on page load.Quest Browser: Before version 5.0, Quest Browser would fire a popstate event on page load.Safari: Before version 10, Safari would fire a popstate event on page load.Safari on iOS: Before version 10, Safari on iOS would fire a popstate event on page load.Samsung Internet: Before version 2.0, Samsung Internet would fire a popstate event on page load.WebView Android: Before version 37, WebView Android would fire a popstate event on page load.WebView on iOS: Before version 10, WebView on iOS would fire a popstate event on page load.
api.WorkerGlobalScope.importScripts πŸ“‹Safari6/8/2009 Firefox3/22/2011652
api.console πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Internet Explorer: In Internet Explorer 8 and 9, the console object is undefined when the developer tools are not open. This behavior was fixed in Internet Explorer 10.
api.console.error_static πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.console.info_static πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Node.js: Alias for console.log
api.console.log_static πŸ“‹Safari10/26/2007 Firefox3/22/20111243
api.console.warn_static πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Node.js: Alias for console.error
css.properties.background.SVG_image_as_background Safari3/18/2008 Firefox3/22/20111099
css.properties.background-clip πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: Chrome accepts alternate synonyms to its values: padding, border, and content.Chrome Android: Chrome Android accepts alternate synonyms to its values: padding, border, and content.Edge: Since Edge 79, accepts alternate synonyms to its values: padding, border, and content.Firefox: Used the -moz-background-clip: padding | border syntax.Internet Explorer: In IE 7 and IE 8 of Internet Explorer, this property always behaved like background-clip: padding-box when overflow was hidden, auto, or scroll.Quest Browser: Quest Browser accepts alternate synonyms to its values: padding, border, and content.Opera: Opera accepts alternate synonyms to its values: padding, border, and content.Opera Android: Opera accepts alternate synonyms to its values: padding, border, and content.Safari: Safari accepts alternate synonyms to its values: padding, border, and content.Safari on iOS: Safari accepts alternate synonyms to its values: padding, border, and content.Samsung Internet: Samsung Internet accepts alternate synonyms to its values: padding, border, and content.WebView Android: WebView Android accepts alternate synonyms to its values: padding, border, and content.WebView on iOS: Safari accepts alternate synonyms to its values: padding, border, and content.
css.properties.background-clip.border-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.background-clip.content-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Internet Explorer: In IE 7 and IE 9 of Internet Explorer, it always behaved like background-clip: padding-box if overflow: hidden | auto | scroll
css.properties.background-clip.padding-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.background-image.svg_images Safari6/7/2010 Firefox3/22/2011288
Safari: Support of SVG in CSS background is incomplete.Safari on iOS: Support of SVG in CSS background is incomplete.WebView on iOS: Support of SVG in CSS background is incomplete.
css.properties.background-origin πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Chrome: Chrome accepts alternate synonyms to its values: padding, border, and content.Chrome Android: Chrome Android accepts alternate synonyms to its values: padding, border, and content.Edge: Since Edge 79, accepts alternate synonyms to its values: padding, border, and content.Firefox: Used the -moz-background-clip: padding | border syntax.Internet Explorer: In IE 7 and before, Internet explorer was behaving as if background-origin: border-box was set. In Internet Explorer 8, as if background-origin: padding-box, the regular default value, was set.Quest Browser: Quest Browser accepts alternate synonyms to its values: padding, border, and content.Opera: Opera accepts alternate synonyms to its values: padding, border, and content.Opera Android: Opera accepts alternate synonyms to its values: padding, border, and content.Safari: Webkit accepts alternate synonyms to its values: padding, border, and content.Safari on iOS: Webkit accepts alternate synonyms to its values: padding, border, and content.Samsung Internet: Samsung Internet accepts alternate synonyms to its values: padding, border, and content.WebView Android: WebView accepts alternate synonyms to its values: padding, border, and content.WebView on iOS: Webkit accepts alternate synonyms to its values: padding, border, and content.
css.properties.background-origin.border-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.background-origin.content-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Internet Explorer: In IE 7 and IE 9 of Internet Explorer, it always behaved like background-clip: padding if overflow: hidden | auto | scroll.
css.properties.background-origin.padding-box πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.background-size πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Chrome Android: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Quest Browser: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Opera: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Opera: Opera 9.5's computation of the background positioning area is incorrect for fixed backgrounds. Opera 9.5 also interprets the two-value form as a horizontal scaling factor and, from appearances, a vertical clipping dimension. This has been fixed in Opera 10.Opera Android: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Opera Android: Opera 9.5's computation of the background positioning area is incorrect for fixed backgrounds. Opera 9.5 also interprets the two-value form as a horizontal scaling factor and, from appearances, a vertical clipping dimension. This has been fixed in Opera 10.Safari: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Safari on iOS: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.Samsung Internet: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.WebView Android: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.WebView on iOS: WebKit-based browsers originally implemented an older draft of CSS3 background-size in which an omitted second value is treated as duplicating the first value; this draft does not include the contain or cover keywords.
css.properties.border-bottom-left-radius πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox 50.Firefox for Android: Before Firefox for Android 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox for Android 50.
css.properties.border-bottom-left-radius.percentages Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 4, the <percentage> was relative to the width of the box even when specifying the radius for a height. This implied that -moz-border-radius-bottomright was always drawing an arc of circle, and never an ellipse, when followed by a single value.
css.properties.border-bottom-right-radius πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox 50.Firefox for Android: Before Firefox for Android 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox for Android 50.
css.properties.border-bottom-right-radius.percentages Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 4, the <percentage> was relative to the width of the box even when specifying the radius for a height. This implied that -moz-border-radius-bottomright was always drawing an arc of circle, and never an ellipse, when followed by a single value.
css.properties.border-radius πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Chrome: Chrome ignores border-radius on <select> elements unless -webkit-appearance is overridden to an appropriate value.Firefox: Before Firefox 50, border styles of rounded corners (with border-radius) were always rendered as if border-style was solid. This has been fixed in Firefox 50.Firefox: To conform to the CSS3 standard, Firefox 4 changes the handling of <percentage> values to match the specification. You can specify an ellipse as a border on an arbitrary sized element with border-radius: 50%;. Firefox 4 also makes rounded corners clip content and images if overflow: visible is not set.Firefox for Android: Before Firefox 50, border styles of rounded corners (with border-radius) were always rendered as if border-style was solid. This has been fixed in Firefox 50.Opera: Before Opera 11.60, replaced elements with border-radius do not have rounded corners.Safari: Safari ignores border-radius on <select> elements unless -webkit-appearance is overridden to an appropriate value.Safari on iOS: Safari ignores border-radius on <select> elements unless -webkit-appearance is overridden to an appropriate value.WebView on iOS: Safari ignores border-radius on <select> elements unless -webkit-appearance is overridden to an appropriate value.
css.properties.border-radius.4_values_for_4_corners Safari6/7/2010 Firefox3/22/2011288
css.properties.border-radius.elliptical_borders Safari10/26/2007 Firefox3/22/20111243
Chrome: Before Chrome 4, the slash / notation is unsupported. If two values are specified, then an elliptical border is drawn on all four corners. -webkit-border-radius: 40px 10px; is equivalent to border-radius: 40px / 10px;.Safari: Before Safari 5, the slash / notation is unsupported. If two values are specified, then an elliptical border is drawn on all four corners. -webkit-border-radius: 40px 10px; is equivalent to border-radius: 40px / 10px;.
css.properties.border-top-left-radius πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox 50.Firefox for Android: Before Firefox for Android 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox for Android 50.
css.properties.border-top-left-radius.percentages Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 4, the <percentage> was relative to the width of the box even when specifying the radius for a height. This implied that -moz-border-radius-bottomright was always drawing an arc of circle, and never an ellipse, when followed by a single value.
css.properties.border-top-right-radius πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox 50.Firefox for Android: Before Firefox for Android 50, border styles of rounded corners were always rendered as if border-style was solid. This has been fixed in Firefox for Android 50.
css.properties.border-top-right-radius.percentages Safari6/7/2010 Firefox3/22/2011288
Firefox: Before Firefox 4, the <percentage> was relative to the width of the box even when specifying the radius for a height. This implied that -moz-border-radius-bottomright was always drawing an arc of circle, and never an ellipse, when followed by a single value.
css.properties.resize πŸ“‹Safari10/26/2007 Firefox3/22/20111243
Firefox for Android: The property is recognized, but has no effect. See bug 1776834.Safari on iOS: The property is recognized, but has no effect. See bug 211994.WebView on iOS: The property is recognized, but has no effect. See bug 211994.
css.properties.resize.both πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.resize.horizontal πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.resize.none πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.resize.vertical πŸ“‹Safari10/26/2007 Firefox3/22/20111243
css.properties.transition.all πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.ease πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.ease-in πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.ease-in-out πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.ease-out πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.linear πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.none πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.step-end πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition.step-start πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-property.all πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-property.none πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.ease πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.ease-in πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.ease-in-out πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.ease-out πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.linear πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.step-end πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.properties.transition-timing-function.step-start πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.selectors.default πŸ“‹Safari6/7/2010 Firefox3/22/2011288
css.selectors.invalid πŸ“‹Safari6/7/2010 Firefox3/22/2011288
css.selectors.optional πŸ“‹Safari6/7/2010 Firefox3/22/2011288
css.selectors.required πŸ“‹Safari6/7/2010 Firefox3/22/2011288
css.selectors.valid πŸ“‹Safari6/7/2010 Firefox3/22/2011288
css.selectors.visited.privacy_measures Safari6/7/2010 Firefox3/22/2011288
css.types.easing-function πŸ“‹Safari3/18/2008 Firefox3/22/20111099
css.types.time πŸ“‹Safari3/18/2008 Firefox3/22/20111099
html.elements.article πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.aside πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.audio.preload πŸ“‹Safari3/18/2008 Firefox3/22/20111099
Chrome: Defaults to metadata in Chrome 64.Chrome Android: Defaults to metadata in Chrome Android 64.Quest Browser: Defaults to metadata in Quest Browser 5.0.Opera: Defaults to metadata in Opera 51.Opera Android: Defaults to metadata in Opera 51.Samsung Internet: Defaults to metadata in Samsung Internet 9.0.WebView Android: Defaults to metadata in Chrome 64.
html.elements.base.href.relative_url Safari10/26/2007 Firefox3/22/20111243
html.elements.footer πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.header πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.hgroup πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.formaction πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.formenctype πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.formmethod πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.formnovalidate πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.formtarget πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.pattern πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.placeholder πŸ“‹Safari6/8/2009 Firefox3/22/2011652
html.elements.input.required πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.type_search πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.input.type_tel πŸ“‹Safari6/8/2009 Firefox3/22/2011652
Chrome: The field type doesn't demonstrate any special behavior.Safari: The field type doesn't demonstrate any special behavior.
html.elements.nav πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.plaintext πŸ“‹Safari6/8/2009 Firefox3/22/2011652
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.section πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.textarea.maxlength πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Safari: Before Safari 17, newline characters counted as two characters instead of one. See bug 249916.Safari on iOS: Before Safari on iOS 17, newline characters counted as two characters instead of one. See bug 249916.WebView on iOS: Before WebView on iOS 17, newline characters counted as two characters instead of one. See bug 249916.
html.elements.textarea.placeholder πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.textarea.required πŸ“‹Safari6/7/2010 Firefox3/22/2011288
html.elements.video.preload πŸ“‹Safari3/18/2008 Firefox3/22/20111099
Chrome: Defaults to metadata in Chrome 64.Chrome Android: Defaults to metadata in Chrome Android 64.Quest Browser: Defaults to metadata in Quest Browser 5.0.Opera: Defaults to metadata in Opera 51.Opera Android: Defaults to metadata in Opera Android 47.Samsung Internet: Defaults to metadata in Samsung Internet 9.0.WebView Android: Defaults to metadata in WebView Android 64.
http.headers.X-Frame-Options πŸ“‹Safari6/8/2009 Firefox3/22/2011652
http.headers.X-Frame-Options.SAMEORIGIN Safari6/8/2009 Firefox3/22/2011652
Chrome: Starting in Chrome 61, this applies to all of a frame's ancestors.Chrome Android: Starting in Chrome Android 61, this applies to all of a frame's ancestors.Firefox: Starting in Firefox 59, this applies to all of a frame's ancestors.Firefox for Android: Starting in Firefox for Android 59, this applies to all of a frame's ancestors.Quest Browser: Starting in Quest Browser 5.0, this applies to all of a frame's ancestors.Opera: Starting in Opera 48, this applies to all of a frame's ancestors.Opera Android: Starting in Opera Android 45, this applies to all of a frame's ancestors.Samsung Internet: Starting in Samsung Internet 8.0, this applies to all of a frame's ancestors.WebView Android: Starting in WebView Android 61, this applies to all of a frame's ancestors.
javascript.builtins.Array.isArray πŸ“‹Safari6/7/2010 Firefox3/22/2011288
javascript.builtins.Object.create πŸ“‹Safari6/7/2010 Firefox3/22/2011288
javascript.builtins.Object.defineProperties πŸ“‹Safari6/7/2010 Firefox3/22/2011288
javascript.builtins.Object.getOwnPropertyDescriptor πŸ“‹Safari6/7/2010 Firefox3/22/2011288
Internet Explorer: In Internet Explorer 8, this was only supported on DOM objects and with some non-standard behaviors. This was later fixed in Internet Explorer 9.
javascript.builtins.Object.getOwnPropertyNames πŸ“‹Safari6/7/2010 Firefox3/22/2011288
javascript.builtins.Object.keys πŸ“‹Safari6/7/2010 Firefox3/22/2011288

2010/6

API First Browser Date Last Browser Date Days Notes
api.DataTransfer.setData πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.Geolocation πŸ“‹Firefox6/30/2009 Safari6/7/2010342
Firefox: GPSD (GPS daemon) support added in Firefox 3.6. WiFi-based location is provided by Google (privacy) or a custom provider (MLS instructions).
api.Geolocation.clearWatch πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.Geolocation.getCurrentPosition πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.Geolocation.watchPosition πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.accuracy πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.altitude πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.altitudeAccuracy πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.heading πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.latitude πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.longitude πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationCoordinates.speed πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationPosition.coords πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationPosition.timestamp πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationPositionError.code πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.GeolocationPositionError.message πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.HTMLElement.draggable πŸ“‹Firefox10/24/2006 Safari6/7/20101322
api.HTMLTextAreaElement.textLength πŸ“‹Firefox11/9/2004 Safari6/7/20102036
api.HashChangeEvent πŸ“‹Firefox1/21/2010 Safari6/7/2010137
api.Navigator.geolocation πŸ“‹Firefox6/30/2009 Safari6/7/2010342
api.PageTransitionEvent πŸ“‹Firefox11/29/2005 Safari6/7/20101651
api.SVGAnimatedBoolean πŸ“‹Firefox6/17/2008 Safari6/7/2010720
api.SVGAnimatedInteger πŸ“‹Firefox6/17/2008 Safari6/7/2010720
api.SVGAnimatedNumberList πŸ“‹Firefox11/29/2005 Safari6/7/20101651
api.SVGAnimatedPreserveAspectRatio πŸ“‹Firefox11/29/2005 Safari6/7/20101651
api.SVGNumberList πŸ“‹Firefox11/29/2005 Safari6/7/20101651
api.Window.hashchange_event πŸ“‹Firefox1/21/2010 Safari6/7/2010137
Chrome: A regular Event object is fired, rather than a HashChangeEvent object.
api.crypto πŸ“‹Firefox11/9/2004 Safari6/7/20102036
Node.js: Available as a part of the crypto module.
css.at-rules.media.aspect-ratio πŸ“‹Firefox6/30/2009 Safari6/7/2010342
css.at-rules.media.orientation πŸ“‹Firefox10/24/2006 Safari6/7/20101322
css.properties.background-size.contain πŸ“‹Firefox1/21/2010 Safari6/7/2010137
css.properties.background-size.cover πŸ“‹Firefox1/21/2010 Safari6/7/2010137
css.properties.box-shadow.inset Firefox6/30/2009 Safari6/7/2010342
Internet Explorer: inset must be the last keyword in the declaration.
css.properties.box-shadow.spread_radius Firefox6/30/2009 Safari6/7/2010342
css.properties.clip-rule πŸ“‹Firefox6/30/2009 Safari6/7/2010342
css.properties.clip-rule.evenodd πŸ“‹Firefox6/30/2009 Safari6/7/2010342
css.properties.clip-rule.nonzero πŸ“‹Firefox6/30/2009 Safari6/7/2010342
css.properties.cursor.none πŸ“‹Firefox6/17/2008 Safari6/7/2010720
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.list-style-type.cjk-ideographic πŸ“‹Firefox11/9/2004 Safari6/7/20102036
Opera: Until version 15, only decimal numbers display.Opera Android: Until version 15, only decimal numbers display.
css.properties.list-style-type.ethiopic-halehame-ti-er Firefox11/9/2004 Safari6/7/20102036
css.properties.list-style-type.ethiopic-halehame-ti-et Firefox11/9/2004 Safari6/7/20102036
css.properties.list-style-type.hangul Firefox11/9/2004 Safari6/7/20102036
css.properties.list-style-type.hangul-consonant Firefox11/9/2004 Safari6/7/20102036
css.properties.text-rendering πŸ“‹Firefox11/9/2004 Safari6/7/20102036
Chrome: This property is only supported on Windows and Linux.Chrome: Initial versions had bugs on Windows and Linux that broke font substitution, small-caps, letter-spacing or caused text to overlap. See bug 40156511, bug 40430936, bug 40444347, bug 40286561.Chrome Android: This property is only supported on Windows and Linux.Chrome Android: Initial versions had bugs on Windows and Linux that broke font substitution, small-caps, letter-spacing or caused text to overlap. See bug 40156511, bug 40430936, bug 40444347, bug 40286561.Edge: This property is only supported on Windows and Linux.Edge: Initial versions had bugs on Windows and Linux that broke font substitution, small-caps, letter-spacing or caused text to overlap. See bug 40156511, bug 40430936, bug 40444347, bug 40286561.Firefox: This property is only supported on Windows and Linux.Firefox: The optimizeSpeed option has no effect on Firefox 4 because the standard code for text rendering is already fast and there is not a faster code path at this time. See bug 595688 for details.Quest Browser: This property is only supported on Windows and Linux.Quest Browser: Initial versions had bugs on Windows and Linux that broke font substitution, small-caps, letter-spacing or caused text to overlap. See bug 40156511, bug 40430936, bug 40444347, bug 40286561.Samsung Internet: This property is only supported on Windows and Linux. Samsung Internet is not on Windows or Linux.WebView Android: From version 3 to 4.3, there is a serious bug where text-rendering: optimizeLegibility causes custom web fonts to not render. This was fixed in version 4.4.
css.properties.text-rendering.auto Firefox11/9/2004 Safari6/7/20102036
Chrome: Chrome treats auto as optimizeSpeed.Chrome Android: Chrome Android treats auto as optimizeSpeed.Edge: Edge treats auto as optimizeSpeed.Firefox: If the font size is 20 pixels or higher, Firefox treats auto as optimizeLegibility. For smaller text, Firefox treats auto as optimizeSpeed. The 20-pixel threshold can be changed with the browser.display.auto_quality_min_font_size preference.Firefox for Android: If the font size is 20 pixels or higher, Firefox treats auto as optimizeLegibility. For smaller text, Firefox treats auto as optimizeSpeed. The 20-pixel threshold can be changed with the browser.display.auto_quality_min_font_size preference.Quest Browser: Quest Browser treats auto as optimizeSpeed.Opera: Opera treats auto as optimizeSpeed.Opera Android: Opera Android treats auto as optimizeSpeed.Safari: Safari treats auto as optimizeSpeed. See bug 41363.Safari on iOS: Safari on iOS treats auto as optimizeSpeed. See bug 41363.Samsung Internet: Samsung Internet treats auto as optimizeSpeed.WebView Android: WebView Android treats auto as optimizeSpeed.WebView on iOS: WebView on iOS treats auto as optimizeSpeed. See bug 41363.
css.types.length.rem Firefox1/21/2010 Safari6/7/2010137
css.types.ratio πŸ“‹Firefox6/30/2009 Safari6/7/2010342
html.elements.input.type_email πŸ“‹Firefox11/9/2004 Safari6/7/20102036
Safari on iOS: Doesn't do validation, but instead offers a custom 'email' keyboard, which is designed to make entering email addresses easier.Safari on iOS: The custom 'email' keyboard does not provide a comma key, so users cannot enter multiple email addresses.Safari on iOS: Automatically applies a default style of opacity: 0.4 to disable textual <input> elements, including those of type 'email'. Other major browsers don't currently share this particular default style.WebView on iOS: Doesn't do validation, but instead offers a custom 'email' keyboard, which is designed to make entering email addresses easier.WebView on iOS: The custom 'email' keyboard does not provide a comma key, so users cannot enter multiple email addresses.WebView on iOS: Automatically applies a default style of opacity: 0.4 to disable textual <input> elements, including those of type 'email'. Other major browsers don't currently share this particular default style.
html.global_attributes.draggable πŸ“‹Firefox10/24/2006 Safari6/7/20101322
http.headers.Set-Cookie.HttpOnly Firefox6/17/2008 Safari6/7/2010720
javascript.builtins.Object.getPrototypeOf πŸ“‹Firefox6/30/2009 Safari6/7/2010342
javascript.builtins.String.trim πŸ“‹Firefox6/30/2009 Safari6/7/2010342
javascript.statements.debugger πŸ“‹Firefox11/9/2004 Safari6/7/20102036
javascript.statements.empty πŸ“‹Firefox11/9/2004 Safari6/7/20102036

2010/1

API First Browser Date Last Browser Date Days Notes
api.DataTransfer.files πŸ“‹Safari6/8/2009 Firefox1/21/2010227
api.Document.readyState πŸ“‹Safari6/23/2003 Firefox1/21/20102404
Internet Explorer: Internet Explorer 9 and 10 have bugs where the 'interactive' state can be fired too early before the document has finished parsing.Internet Explorer: Only supports 'complete'.Opera: Opera Presto fires 'complete' late after the 'load' event (in an incorrect order as per HTML5 standard specification).Opera Android: Opera Presto fires 'complete' late after the 'load' event (in an incorrect order as per HTML5 standard specification).
api.HTMLInputElement.indeterminate πŸ“‹Safari10/26/2007 Firefox1/21/2010818
api.HTMLInputElement.multiple πŸ“‹Safari6/8/2009 Firefox1/21/2010227
api.HTMLVideoElement.poster πŸ“‹Safari3/18/2008 Firefox1/21/2010674
css.properties.background.multiple_backgrounds Safari4/15/2005 Firefox1/21/20101742
css.properties.background-attachment.multiple_backgrounds Safari4/15/2005 Firefox1/21/20101742
css.properties.background-image.gradients πŸ“‹Safari6/8/2009 Firefox1/21/2010227
Chrome: Some versions support only experimental gradients prefixed with -webkit.Chrome Android: Some versions support only experimental gradients prefixed with -webkit.Firefox: Some versions support only experimental gradients prefixed with -moz.Firefox for Android: Some versions support only experimental gradients prefixed with -moz.Quest Browser: Some versions support only experimental gradients prefixed with -webkit.Opera: Some versions support only experimental gradients prefixed with -o.Opera Android: Some versions support only experimental gradients prefixed with -webkit.Safari: Some versions support only experimental gradients prefixed with -webkit.Safari on iOS: Some versions support only experimental gradients prefixed with -webkit.Samsung Internet: Some versions support only experimental gradients prefixed with -webkit.WebView Android: Some versions support only experimental gradients prefixed with -webkit.WebView on iOS: Some versions support only experimental gradients prefixed with -webkit.
css.properties.background-image.multiple_backgrounds Safari4/15/2005 Firefox1/21/20101742
css.properties.background-position.multiple_backgrounds Safari4/15/2005 Firefox1/21/20101742
css.properties.background-repeat.multiple_backgrounds Safari4/15/2005 Firefox1/21/20101742
css.properties.background-size.auto πŸ“‹Safari10/26/2007 Firefox1/21/2010818
css.properties.pointer-events.html_elements Safari6/8/2009 Firefox1/21/2010227
css.selectors.indeterminate.checkbox Safari10/26/2007 Firefox1/21/2010818
css.types.angle πŸ“‹Safari6/8/2009 Firefox1/21/2010227
css.types.angle.deg Safari6/8/2009 Firefox1/21/2010227
css.types.angle.grad Safari6/8/2009 Firefox1/21/2010227
css.types.angle.rad Safari6/8/2009 Firefox1/21/2010227
css.types.angle-percentage πŸ“‹Safari6/8/2009 Firefox1/21/2010227
html.elements.input.multiple πŸ“‹Safari6/8/2009 Firefox1/21/2010227
html.elements.script.async πŸ“‹Safari6/8/2009 Firefox1/21/2010227
html.elements.video.poster πŸ“‹Safari3/18/2008 Firefox1/21/2010674

2009/6

API First Browser Date Last Browser Date Days Notes
api.CSSFontFaceRule πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.CSSFontFaceRule.style πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.CanvasRenderingContext2D.createImageData πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.fillText πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.measureText πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.strokeText πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.textAlign πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.textBaseline πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer πŸ“‹Safari6/8/2009 Firefox6/30/200922
Firefox: As of Firefox 52, the DataTransfer.types property returns a frozen array of DOMStrings as per spec, rather than a DOMStringList.Firefox for Android: As of Firefox for Android 52, the DataTransfer.types property returns a frozen array of DOMStrings as per spec, rather than a DOMStringList.
api.DataTransfer.clearData πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer.dropEffect πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer.effectAllowed πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer.getData πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer.setDragImage πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DataTransfer.types πŸ“‹Safari6/8/2009 Firefox6/30/200922
Internet Explorer: The property returns a DOMStringList.Internet Explorer: Text is returned instead of text/plainOpera: As of Opera 12, Text is returned instead of text/plain
api.DedicatedWorkerGlobalScope πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DedicatedWorkerGlobalScope.close πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DedicatedWorkerGlobalScope.message_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.DedicatedWorkerGlobalScope.postMessage πŸ“‹Safari6/8/2009 Firefox6/30/200922
Deno: The message parameter does not support cloning Blob values.Deno: The message parameter does not support cloning Blob values.Deno: The transfer parameter does not accept ArrayBuffer items. Passing an ArrayBuffer results in an error being thrown.Deno: The message parameter does not support cloning SharedArrayBuffer or Blob values.Deno: The transfer parameter is ignored.Deno: Data passed in the message parameter is serialized with JSON, not the structured clone algorithm.Deno: The transfer parameter is ignored.
api.Document.querySelector πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.Document.querySelectorAll πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.DocumentFragment.querySelector πŸ“‹Safari6/8/2009 Firefox6/30/200922
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.DocumentFragment.querySelectorAll πŸ“‹Safari6/8/2009 Firefox6/30/200922
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.Element.childElementCount πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Element.children πŸ“‹Safari6/8/2009 Firefox6/30/200922
Internet Explorer: Also includes non-standard HTMLCommentElement nodes.
api.Element.firstElementChild πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Element.lastElementChild πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Element.nextElementSibling πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Element.previousElementSibling πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Element.querySelector πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Internet Explorer: querySelector() is supported, but only for CSS 2.1 selectors.
api.Element.querySelectorAll πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.HTMLAudioElement πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLAudioElement.Audio πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLElement.dragexit_event Safari3/18/2008 Firefox6/30/2009469
api.HTMLIFrameElement.getSVGDocument πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.autoplay πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.canPlayType πŸ“‹Safari6/8/2009 Firefox6/30/200922
Chrome: codecs string can contain any subset of optional parameters (should be all or none).Chrome: Errors if codecs string contains unexpected characters (should evaluate string up to character).Chrome Android: codecs string can contain any subset of optional parameters (should be all or none).Chrome Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Edge: codecs string can contain any subset of optional parameters (should be all or none).Edge: Errors if codecs string contains unexpected characters (should evaluate string up to character).Firefox: Before Firefox 28, canPlayType() returned probably when asked about WebM audio or video files without the codecs parameter. Since multiple codecs are supported, this is not enough information to determine if a file can be played, so maybe is now correctly returned.Firefox: Before Firefox 101, canPlayType() ignored codecs parameter options for av01 codecs (treating them as av1).Firefox for Android: Before Firefox for Android 28, canPlayType() returned probably when asked about WebM audio or video files without the codecs parameter. Since multiple codecs are supported, this is not enough information to determine if a file can be played, so maybe is now correctly returned.Firefox for Android: Before Firefox for Android 101, canPlayType() ignored codecs parameter options for av01 codecs (treating them as av1).Quest Browser: codecs string can contain any subset of optional parameters (should be all or none).Quest Browser: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera: codecs string can contain any subset of optional parameters (should be all or none).Opera: Errors if codecs string contains unexpected characters (should evaluate string up to character).Opera Android: codecs string can contain any subset of optional parameters (should be all or none).Opera Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).Samsung Internet: codecs string can contain any subset of optional parameters (should be all or none).Samsung Internet: Errors if codecs string contains unexpected characters (should evaluate string up to character).WebView Android: codecs string can contain any subset of optional parameters (should be all or none).WebView Android: Errors if codecs string contains unexpected characters (should evaluate string up to character).
api.HTMLMediaElement.canplay_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.canplaythrough_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.controls πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.currentSrc πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.currentTime πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.duration πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.durationchange_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.emptied_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.ended πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.ended_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.error πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.load πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.loadeddata_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.loadedmetadata_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.muted πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.networkState πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Firefox: The NETWORK_LOADED state was removed to align with the HTML spec in Firefox 4.
api.HTMLMediaElement.pause πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.pause_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.paused πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.play πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.play_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.playing_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.ratechange_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.readyState πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.seeked_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.seeking πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.seeking_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.stalled_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.suspend_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.timeupdate_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLMediaElement.volume πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Safari on iOS: volume returns a value and is writable; however, the value is always 1, and setting a value has no effect on the volume of the media object.WebView on iOS: volume returns a value and is writable; however, the value is always 1, and setting a value has no effect on the volume of the media object.
api.HTMLObjectElement.getSVGDocument πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.HTMLScriptElement.defer πŸ“‹Safari10/26/2007 Firefox6/30/2009613
Internet Explorer: Before Internet Explorer 10, it implemented defer by a proprietary specification. Since version 10 it conforms to the W3C specification.
api.HTMLSourceElement πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLSourceElement.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLSourceElement.type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLVideoElement πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLVideoElement.height πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLVideoElement.resize_event πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: The onresize event handler property is not supported.Internet Explorer: The onresize event handler property is not supported.
api.HTMLVideoElement.videoHeight πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLVideoElement.videoWidth πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.HTMLVideoElement.width πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ImageData πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ImageData.data πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ImageData.height πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ImageData.width πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.MediaError.code πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.NodeIterator πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.detach πŸ“‹Safari10/26/2007 Firefox6/30/2009613
Chrome: Since Chrome 45, this method does nothing, as specified. See bug 40362826.Chrome Android: Since Chrome Android 45, this method does nothing, as specified. See bug 40362826.Firefox: Since Firefox 22, this method does nothing, as specified. See bug 823549.Firefox for Android: Since Firefox for Android 22, this method does nothing, as specified. See bug 823549.Quest Browser: Since Quest Browser 5.0, this method does nothing, as specified. See bug 40362826.Opera: Since Opera 32, this method does nothing, as specified. See bug 40362826.Opera Android: Since Opera Android 32, this method does nothing, as specified. See bug 40362826.Safari: Since Safari 10, this method does nothing, as specified. See bug 148454.Safari on iOS: Since Safari on iOS 10, this method does nothing, as specified. See bug 148454.Samsung Internet: Since Samsung Internet 5.0, this method does nothing, as specified. See bug 40362826.WebView Android: Since WebView Android 45, this method does nothing, as specified. See bug 40362826.WebView on iOS: Since WebView on iOS 10, this method does nothing, as specified. See bug 148454.
api.NodeIterator.filter πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.nextNode πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.pointerBeforeReferenceNode πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.previousNode πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.referenceNode πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.root πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.NodeIterator.whatToShow πŸ“‹Safari10/26/2007 Firefox6/30/2009613
api.ProgressEvent πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ProgressEvent.lengthComputable πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ProgressEvent.loaded πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.ProgressEvent.total πŸ“‹Safari3/18/2008 Firefox6/30/2009469
api.Storage πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.clear πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.getItem πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.key πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.length πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.removeItem πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Storage.setItem πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Text.wholeText πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.Window.localStorage πŸ“‹Safari6/8/2009 Firefox6/30/200922
Deno: The key used for the Web Storage bucket is based on various factors. See the Deno manual.
api.Worker πŸ“‹Safari6/8/2009 Firefox6/30/200922
Node.js: Inherits from a Node EventEmitter instead of DOM EventTarget.Node.js: Also supports CommonJS modules, enabled for files ending with .cjs and for files ending with .js when the nearest parent package.json file contains a top-level field "type" with a value not of "commonjs".Node.js: Available as a part of the worker_threads module.
api.Worker.Worker πŸ“‹Safari6/8/2009 Firefox6/30/200922
Node.js: Takes entirely different options parameters.
api.Worker.error_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
Node.js: Supports the event, but only via Node EventEmitter.
api.Worker.message_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
Node.js: Supports the event, but only via Node EventEmitter.
api.Worker.postMessage πŸ“‹Safari6/8/2009 Firefox6/30/200922
Deno: The message parameter does not support cloning Blob values.Deno: The message parameter does not support cloning Blob values.Deno: The transfer parameter does not accept ArrayBuffer items. Passing an ArrayBuffer results in an error being thrown.Deno: The message parameter does not support SharedArrayBuffer.Deno: The transfer parameter is not supported, and results in an error being thrown.Deno: Data passed in the message parameter is serialized with JSON, not the structured clone algorithm.Deno: The transfer parameter is not supported, and results in an error being thrown.Internet Explorer: Internet Explorer does not support Transferable objects.Node.js: Only accepts an array of transfer objects as the second parameter, not an options object with a transfer property.Node.js: Only supports transferring ArrayBuffer and MessagePort objects.
api.Worker.terminate πŸ“‹Safari6/8/2009 Firefox6/30/200922
Node.js: Returns a Promise.Node.js: Takes an optional callback parameter to be executed when the worker has terminated.
api.WorkerGlobalScope πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerGlobalScope.error_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerGlobalScope.location πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerGlobalScope.navigator πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerGlobalScope.self πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.hash πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.host πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.hostname πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.href πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.pathname πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.port πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.protocol πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.search πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerLocation.toString πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerNavigator πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerNavigator.appName πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerNavigator.appVersion πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.WorkerNavigator.onLine πŸ“‹Safari6/8/2009 Firefox6/30/200922
Firefox: Since Firefox 4 the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity. Since Firefox 41, on OS X and Windows, the returned values follow the actual network connectivity, unless 'Work offline' mode is selected (where it will always return false).Opera: From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.Opera Android: From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.WebView Android: Can incorrectly return true, see bug 41369933.
api.WorkerNavigator.platform πŸ“‹Safari6/8/2009 Firefox6/30/200922
Firefox: Before Firefox 69, platform would report running on a 32-bit CPU if running the 32-bit version of Firefox on a 64-bit system.Firefox: You can override the value returned by platform by setting the preference general.platform.override to the string you wish to be returned instead.
api.WorkerNavigator.userAgent πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequest.abort_event πŸ“‹Safari4/15/2005 Firefox6/30/20091537
api.XMLHttpRequest.loadstart_event πŸ“‹Safari4/15/2005 Firefox6/30/20091537
api.XMLHttpRequest.upload πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequest.withCredentials πŸ“‹Safari6/8/2009 Firefox6/30/200922
Firefox: Starting with Firefox 11, it's no longer supported to use the withCredentials attribute when performing synchronous requests. Attempting to do so throws an NS_ERROR_DOM_INVALID_ACCESS_ERR exception.Firefox for Android: Starting with Firefox for Android 14, it's no longer supported to use the withCredentials attribute when performing synchronous requests. Attempting to do so throws an NS_ERROR_DOM_INVALID_ACCESS_ERR exception.Internet Explorer: Internet Explorer versions 8 and 9 supported cross-domain requests (CORS) using XDomainRequest.
api.XMLHttpRequest.worker_support Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload.abort_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload.error_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload.load_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload.loadstart_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.XMLHttpRequestUpload.progress_event πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.clearInterval.worker_support Safari6/8/2009 Firefox6/30/200922
api.clearTimeout.worker_support Safari6/8/2009 Firefox6/30/200922
api.setInterval.worker_support Safari6/8/2009 Firefox6/30/200922
api.setTimeout.worker_support Safari6/8/2009 Firefox6/30/200922
css.at-rules.font-face πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.at-rules.font-face.font-family πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.at-rules.font-face.font-style πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.at-rules.font-face.font-variant Safari3/18/2008 Firefox6/30/2009469
css.at-rules.font-face.font-weight πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.at-rules.font-face.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.properties.border-bottom-left-radius.elliptical_corners Safari10/26/2007 Firefox6/30/2009613
css.properties.border-bottom-right-radius.elliptical_corners Safari10/26/2007 Firefox6/30/2009613
css.properties.border-image.none πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.border-image.repeat πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.border-image.round πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.border-image.space πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.border-image.stretch πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.border-top-left-radius.elliptical_corners Safari10/26/2007 Firefox6/30/2009613
css.properties.border-top-right-radius.elliptical_corners Safari10/26/2007 Firefox6/30/2009613
css.properties.box-shadow.multiple_shadows Safari10/26/2007 Firefox6/30/2009613
css.properties.box-shadow.none πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.dashed πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.dotted πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.double πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.groove πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.hidden πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.inset πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.medium πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.none πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.outset πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.ridge πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.solid πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.thick πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.thin πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule.transparent πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-color.transparent πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.dashed πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.dotted πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.double πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.groove πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.hidden πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.inset πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.none πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.outset πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.ridge πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-style.solid πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-width.medium πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-width.thick πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.column-rule-width.thin πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-wrap.break-word πŸ“‹Safari6/23/2003 Firefox6/30/20092199
css.properties.overflow-wrap.normal πŸ“‹Safari6/23/2003 Firefox6/30/20092199
css.properties.overflow-x πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-x.auto πŸ“‹Safari10/26/2007 Firefox6/30/2009613
Safari: Before Safari 12.1, overlay only had an effect on legacy scrollbars on macOS. Since Safari 12.1, it is parsed as auto.Safari on iOS: Before Safari on iOS 12.1, overlay only had an effect on legacy scrollbars on macOS. Since Safari on iOS 12.1, it is parsed as auto.WebView on iOS: Before WebView on iOS 12.1, overlay only had an effect on legacy scrollbars on macOS. Since WebView on iOS 12.1, it is parsed as auto.
css.properties.overflow-x.hidden πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-x.scroll πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-x.visible πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-y πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-y.auto πŸ“‹Safari10/26/2007 Firefox6/30/2009613
Safari: Before Safari 12.1, overlay only had an effect on legacy scrollbars on macOS. Since Safari 12.1, it is parsed as auto.Safari on iOS: Before Safari on iOS 12.1, overlay only had an effect on legacy scrollbars on macOS. Since Safari on iOS 12.1, it is parsed as auto.WebView on iOS: Before WebView on iOS 12.1, overlay only had an effect on legacy scrollbars on macOS. Since WebView on iOS 12.1, it is parsed as auto.
css.properties.overflow-y.hidden πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-y.scroll πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.overflow-y.visible πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.properties.text-shadow πŸ“‹Safari10/24/2003 Firefox6/30/20092076
Firefox: Firefox versions before 57 have a bug whereby transitions will not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (bug 726550).Firefox: From Firefox 4, the blur radius is capped at 300 for performance reasons.Firefox: Firefox theoretically supports infinite text-shadows (don't try it).Firefox: If the <color> value is unspecified, then Firefox uses the value of the element's color property.Firefox for Android: Firefox for Android versions before 57 have a bug whereby transitions will not work when transitioning from a text-shadow with a color specified to a text-shadow without a color specified (bug 726550).Firefox for Android: From Firefox for Android 4, the blur radius is capped at 300 for performance reasons.Firefox for Android: Firefox for Android theoretically supports infinite text-shadows (don't try it).Firefox for Android: If the <color> value is unspecified, then Firefox for Android uses the value of the element's color property.Opera: Opera supports a maximum of 6-9 text-shadows for performance reasons. The blur radius is limited to 100px.Opera: Opera 9.5 to 10.1 adheres to the old, reverse painting order (in CSS2, the first specified shadow is on the bottom).Safari: In Safari, any shadows that do not explicitly specify a color are transparent.Safari: Safari 1.1 to 3.2 only supports one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari 4.0 (WebKit 528) and later support multiple text-shadows.Safari on iOS: In Safari, any shadows that do not explicitly specify a color are transparent.Safari on iOS: Safari iOS 1 and 2 only support one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari iOS 3 (WebKit 528) and later support multiple text-shadows.WebView on iOS: In Safari, any shadows that do not explicitly specify a color are transparent.WebView on iOS: Safari iOS 1 and 2 only support one text-shadow (displays the first shadow of a comma-separated list and ignores the rest). Safari iOS 3 (WebKit 528) and later support multiple text-shadows.
css.properties.text-shadow.none πŸ“‹Safari10/24/2003 Firefox6/30/20092076
css.properties.transform.none πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.properties.transform-origin.bottom πŸ“‹Safari4/29/2005 Firefox6/30/20091523
css.properties.transform-origin.center πŸ“‹Safari4/29/2005 Firefox6/30/20091523
css.properties.transform-origin.left πŸ“‹Safari4/29/2005 Firefox6/30/20091523
css.properties.transform-origin.right πŸ“‹Safari4/29/2005 Firefox6/30/20091523
css.properties.transform-origin.top πŸ“‹Safari4/29/2005 Firefox6/30/20091523
css.properties.white-space.pre-line πŸ“‹Safari10/26/2007 Firefox6/30/2009613
css.selectors.first-of-type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.Internet Explorer: Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
css.selectors.last-of-type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.Internet Explorer: Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
css.selectors.nth-child πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Opera: Before Opera 15, Opera does not handle dynamically inserted elements for :nth-child().Opera Android: Before Opera 15, Opera does not handle dynamically inserted elements for :nth-child().
css.selectors.nth-last-child πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.selectors.nth-last-of-type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.Internet Explorer: Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
css.selectors.nth-of-type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.Internet Explorer: Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
css.selectors.only-of-type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Edge: Before Edge 16, Microsoft Edge treats all unknown elements (such as custom elements) as the same element type.Internet Explorer: Internet Explorer treats all unknown elements (such as custom elements) as the same element type.
css.types.transform-function πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Internet Explorer: Internet Explorer 9 supports 2D but not 3D transforms. In version 9, mixing 2D and 3D transform functions invalidates the entire property.
css.types.transform-function.matrix πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Firefox: Before Firefox 16, the translation values of matrix() could be <length>s, in addition to the standard <number>.
css.types.transform-function.rotate πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.scale πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.scaleX πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.scaleY πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.skew πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Firefox: Firefox 14 removed experimental support for skew(), but it was reintroduced in Firefox 15.
css.types.transform-function.skewX πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.skewY πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.translate πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.translateX πŸ“‹Safari3/18/2008 Firefox6/30/2009469
css.types.transform-function.translateY πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.audio πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Firefox: For Firefox to play audio, the server must serve the file using the correct MIME type.Firefox for Android: For Firefox for Android to play audio, the server must serve the file using the correct MIME type.
html.elements.audio.controls πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.audio.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.script.defer πŸ“‹Safari10/26/2007 Firefox6/30/2009613
Chrome: Chrome does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Chrome Android: Chrome Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Firefox: Since Firefox 3.6, the defer attribute is ignored on scripts that don't have the src attribute. However, in Firefox 3.5 even inline scripts are deferred if the defer attribute is set.Internet Explorer: Before version 10, Internet Explorer implemented defer by a proprietary specification. Since version 10 it conforms to the W3C specification.Quest Browser: Quest Browser does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Opera: Opera does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Opera Android: Opera Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348Samsung Internet: Samsung Internet does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348WebView Android: WebView Android does not defer scripts with the defer attribute when the page is served as XHTML (application/xhtml+xml), see bug 41253514 and bug 41408348
html.elements.source πŸ“‹Safari3/18/2008 Firefox6/30/2009469
Firefox: Until Firefox 15, Firefox picked the first source element that has a type matching the MIME-type of a supported media format; see bug 449363 for details.Firefox for Android: Until Firefox for Android 15, Firefox for Android picked the first source element that has a type matching the MIME-type of a supported media format; see bug 449363 for details.
html.elements.source.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.source.type πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video.autoplay πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video.controls πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video.height πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video.src πŸ“‹Safari3/18/2008 Firefox6/30/2009469
html.elements.video.width πŸ“‹Safari3/18/2008 Firefox6/30/2009469
http.headers.Access-Control-Allow-Credentials πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Allow-Headers πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Allow-Methods πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Allow-Origin πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Expose-Headers πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Max-Age πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Request-Headers πŸ“‹Safari6/8/2009 Firefox6/30/200922
http.headers.Access-Control-Request-Method πŸ“‹Safari6/8/2009 Firefox6/30/200922
javascript.builtins.JSON πŸ“‹Safari6/8/2009 Firefox6/30/200922
javascript.builtins.JSON.parse πŸ“‹Safari6/8/2009 Firefox6/30/200922
javascript.builtins.JSON.stringify πŸ“‹Safari6/8/2009 Firefox6/30/200922
api.CanvasRenderingContext2D.getImageData πŸ“‹Firefox10/24/2006 Safari6/8/2009958
Firefox: Since Firefox 5, getImageData now correctly accepts rectangles that extend beyond the bounds of the canvas; pixels outside the canvas are returned as transparent black and now also returns at least one pixel's worth of image data if a rectangle smaller than one pixel is specified.Firefox for Android: Since Firefox for Android 5, getImageData now correctly accepts rectangles that extend beyond the bounds of the canvas; pixels outside the canvas are returned as transparent black and now also returns at least one pixel's worth of image data if a rectangle smaller than one pixel is specified.
api.CanvasRenderingContext2D.putImageData πŸ“‹Firefox10/24/2006 Safari6/8/2009958
api.CanvasRenderingContext2D.setTransform πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRect.height πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRect.width πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectList.item πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectList.length πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.bottom πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.height πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.left πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.right πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.top πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.DOMRectReadOnly.width πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.Document.elementFromPoint πŸ“‹Firefox6/17/2008 Safari6/8/2009356
Chrome: Before Chrome 66, this method returned null when the element was a child of a host node. See bug 40537452.Chrome Android: Before Chrome Android 66, this method returned null when the element was a child of a host node. See bug 40537452.Quest Browser: Before Quest Browser 5.0, this method returned null when the element was a child of a host node. See bug 40537452.Opera: Before Opera 53, this method returned null when the element was a child of a host node. See bug 40537452.Opera Android: Before Opera Android 47, this method returned null when the element was a child of a host node. See bug 40537452.Samsung Internet: Before Samsung Internet 9.0, this method returned null when the element was a child of a host node. See bug 40537452.WebView Android: Before WebView Android 66, this method returned null when the element was a child of a host node. See bug 40537452.
api.Document.lastModified πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.location πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Document.styleSheets πŸ“‹Firefox11/9/2004 Safari6/8/20091672
api.Document.title πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Safari: Only supported for HTMLDocument and XMLDocument, but not SVGDocument objects.Safari: Only supported for HTMLDocument, not all Document objects.Safari on iOS: Only supported for HTMLDocument and XMLDocument, but not SVGDocument objects.Safari on iOS: Only supported for HTMLDocument, not all Document objects.WebView on iOS: Only supported for HTMLDocument and XMLDocument, but not SVGDocument objects.WebView on iOS: Only supported for HTMLDocument, not all Document objects.
api.Element.getBoundingClientRect πŸ“‹Firefox6/17/2008 Safari6/8/2009356
Safari on iOS: Safari for iOS will modify the effective viewport based on the user zoom. This results in incorrect values whenever the user has zoomed.WebView on iOS: Safari for iOS will modify the effective viewport based on the user zoom. This results in incorrect values whenever the user has zoomed.
api.Element.getClientRects πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.FileList πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.FileList.item πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.FileList.length πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.HTMLCanvasElement.toDataURL πŸ“‹Firefox10/24/2006 Safari6/8/2009958
api.HTMLInputElement.files πŸ“‹Firefox6/17/2008 Safari6/8/2009356
Internet Explorer: This property is read-only.
api.HTMLTableElement.insertRow πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Starting with Firefox 20, the index parameter has been made optional and defaults to -1 as per HTML specification.Firefox for Android: Starting with Firefox for Android 20, the index parameter has been made optional and defaults to -1 as per HTML specification.
api.MessageEvent πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.data πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.initMessageEvent πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.lastEventId πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.origin πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.ports πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MessageEvent.source πŸ“‹Firefox6/17/2008 Safari6/8/2009356
api.MimeTypeArray.item πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Before version 59, method parameters were optionalChrome Android: Before version 59, method parameters were optionalQuest Browser: Before version 5.0, method parameters were optionalSamsung Internet: Before Samsung Internet 7.0, method parameters were optionalWebView Android: Before version 59, method parameters were optional
api.MimeTypeArray.namedItem πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Before version 59, method parameters were optionalChrome Android: Before version 59, method parameters were optionalQuest Browser: Before version 5.0, method parameters were optionalSamsung Internet: Before Samsung Internet 7.0, method parameters were optionalWebView Android: Before version 59, method parameters were optional
api.Navigator.onLine πŸ“‹Firefox11/29/2005 Safari6/8/20091287
Chrome: Earlier versions of Chrome incorrectly return true when a tab is first opened, but it starts reporting the correct connectivity status after the first network event. Windows: 11, macOS: 14, ChromeOS: 13, Linux: Always returns true. For history, see bug 40530968.Firefox: Since Firefox 4 the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity. Since Firefox 41, on OS X and Windows, the returned values follow the actual network connectivity, unless 'Work offline' mode is selected (where it will always return false).Internet Explorer: in Internet Explorer 8 'online' and 'offline' events are raised on the document.body; under IE 9 they are raised on both document.body and window.Opera: From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.Opera Android: From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.WebView Android: Can incorrectly return true, see bug 41369933.
api.Node.baseURI πŸ“‹Firefox11/9/2004 Safari6/8/20091672
api.Node.compareDocumentPosition πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Internet Explorer: Only supports contains for elements
api.Plugin.item πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Starting with version 59, method parameters are required instead of optional.Chrome Android: Starting with version 59, method parameters are required instead of optional.Quest Browser: Starting with version 5.0, method parameters are required instead of optional.Samsung Internet: Starting with Samsung Internet 7.0, method parameters are required instead of optional.WebView Android: Starting with version 59, method parameters are required instead of optional.
api.Plugin.namedItem πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Starting with version 59, method parameters are required instead of optional.Chrome Android: Starting with version 59, method parameters are required instead of optional.Quest Browser: Starting with version 5.0, method parameters are required instead of optional.Samsung Internet: Starting with Samsung Internet 7.0, method parameters are required instead of optional.WebView Android: Starting with version 59, method parameters are required instead of optional.
api.PluginArray.item πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Since Chrome 59, method parameters are required instead of optional.Chrome Android: Since Chrome Android 59, method parameters are required instead of optional.Edge: Since Edge 79, method parameters are required instead of optional.Quest Browser: Since Quest Browser 5.0, method parameters are required instead of optional.Opera: Since Opera 46, method parameters are required instead of optional.Opera Android: Since Opera Android 43, method parameters are required instead of optional.Samsung Internet: Since Samsung Internet 7.0, method parameters are required instead of optional.WebView Android: Since WebView Android 59, method parameters are required instead of optional.
api.PluginArray.namedItem πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Since Chrome 59, method parameters are required instead of optional.Chrome Android: Since Chrome Android 59, method parameters are required instead of optional.Edge: Since Edge 79, method parameters are required instead of optional.Quest Browser: Since Quest Browser 5.0, method parameters are required instead of optional.Opera: Since Opera 46, method parameters are required instead of optional.Opera Android: Since Opera Android 43, method parameters are required instead of optional.Samsung Internet: Since Samsung Internet 7.0, method parameters are required instead of optional.WebView Android: Since WebView Android 59, method parameters are required instead of optional.
api.SVGRectElement.rx πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGRectElement.ry πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.angle πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.matrix πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setMatrix πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setRotate πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setScale πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setSkewX πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setSkewY πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.setTranslate πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.SVGTransform.type πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.TextMetrics πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.TextMetrics.width πŸ“‹Firefox11/29/2005 Safari6/8/20091287
api.Window.postMessage πŸ“‹Firefox6/17/2008 Safari6/8/2009356
Firefox: Firefox 8 and up supports sending File and FileList objects between windows. This is only allowed if the recipient's principal is contained within the sender's principal for security reasons.Firefox: Before Firefox 6, the message parameter must be a string. Since Firefox 6, the message parameter is serialized using the structured clone algorithm. This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself.Firefox for Android: Firefox for Android 8 and up supports sending File and FileList objects between windows. This is only allowed if the recipient's principal is contained within the sender's principal for security reasons.Firefox for Android: Before Firefox for Android 6, the message parameter must be a string. Since Firefox for Android 6, the message parameter is serialized using the structured clone algorithm. This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself.Internet Explorer: IE10 had an important limitation: see this article for details.Internet Explorer: Support only for <frame> and <iframe>.
api.Window.sessionStorage πŸ“‹Firefox10/24/2006 Safari6/8/2009958
api.clearTimeout πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Internet Explorer: From Internet Explorer 4 through 8, clearTimeout is an Object rather than a Function. This behavior was fixed in Internet Explorer 9.Node.js: Takes a Timeout object instead of the timeoutID.
css.at-rules.charset πŸ“‹Firefox11/29/2005 Safari6/8/20091287
Firefox: Firefox 1 supported an invalid syntax where the character encoding is not between single or double quotes.Internet Explorer: From Internet Explorer 5.5 to IE 7 (inclusive), Internet Explorer supported an invalid syntax where the character encoding is not between single or double quotes.
css.properties.color-interpolation πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.color-interpolation.auto πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.color-interpolation.linearRGB πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.color-interpolation.sRGB πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.display.table-caption Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.alphabetic πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.auto πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.central πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.hanging πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.ideographic πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.mathematical πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.dominant-baseline.middle πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.fill πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.fill.none πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.fill-opacity πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.fill-rule πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.fill-rule.evenodd πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.fill-rule.nonzero πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker.none πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-end πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-end.none πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-mid πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-mid.none πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-start πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.marker-start.none πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.pointer-events πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.all πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.auto πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.fill πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.none πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.painted πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.stroke πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.pointer-events.visible πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.shape-rendering πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.shape-rendering.auto πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.stop-color πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.stop-opacity πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.stroke πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke.none πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-dasharray πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-dasharray.none πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-dashoffset πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linecap πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linecap.butt πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linecap.round πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linecap.square πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linejoin πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linejoin.bevel πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linejoin.miter πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-linejoin.round πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-miterlimit πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-opacity πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.stroke-width πŸ“‹Firefox11/29/2005 Safari6/8/20091287
css.properties.text-align.center πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.text-align.left πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.text-align.right πŸ“‹Firefox11/9/2004 Safari6/8/20091672
css.properties.text-anchor πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.text-anchor.end πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.text-anchor.middle πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.properties.text-anchor.start πŸ“‹Firefox6/17/2008 Safari6/8/2009356
css.selectors.after πŸ“‹Firefox11/29/2005 Safari6/8/20091287
Firefox: Before Firefox 57, Firefox had a bug where ::after pseudo-elements were still generated, even if the content property value were set to normal or none.Firefox: Before Firefox 3.5, only the CSS level 2 behavior of :after was supported, which disallowed position, float, list-style-* and some display properties.Firefox for Android: Before Firefox for Android 57, Firefox for Android had a bug where ::after pseudo-elements were still generated, even if the content property value were set to normal or none.Firefox for Android: Before Firefox for Android 4.5, only the CSS level 2 behavior of :after was supported, which disallowed position, float, list-style-* and some display properties.
css.selectors.before πŸ“‹Firefox11/29/2005 Safari6/8/20091287
Firefox: Before Firefox 57, Firefox had a bug where ::before pseudo-elements were still generated, even if the content property value were set to normal or none.Firefox: Before Firefox 3.5, only the CSS level 2 behavior of :before was supported, which disallowed position, float, list-style-* and some display properties.Firefox for Android: Before Firefox 57, Firefox had a bug where ::before pseudo-elements were still generated, even if the content property value were set to normal or none.
css.types.color.currentcolor πŸ“‹Firefox11/29/2005 Safari6/8/20091287
html.elements.abbr πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.big πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.blockquote πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.blockquote.cite Firefox11/9/2004 Safari6/8/20091672
html.elements.body.alink Firefox11/9/2004 Safari6/8/20091672
html.elements.body.background Firefox11/9/2004 Safari6/8/20091672
html.elements.body.bgcolor Firefox11/9/2004 Safari6/8/20091672
html.elements.body.link Firefox11/9/2004 Safari6/8/20091672
html.elements.body.text Firefox11/9/2004 Safari6/8/20091672
html.elements.body.vlink Firefox11/9/2004 Safari6/8/20091672
html.elements.br.clear Firefox11/9/2004 Safari6/8/20091672
html.elements.button.disabled πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.button.name Firefox11/9/2004 Safari6/8/20091672
html.elements.button.type Firefox11/9/2004 Safari6/8/20091672
html.elements.button.value Firefox11/9/2004 Safari6/8/20091672
html.elements.caption πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.caption.align Firefox11/9/2004 Safari6/8/20091672
html.elements.center πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.cite πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.code πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.col πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.col.span πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.col.width πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.colgroup πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.colgroup.span πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.colgroup.width πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.dd πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element was implemented using the HTMLSpanElement interface instead of HTMLElement.
html.elements.del πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.dir πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.dir.compact Firefox11/9/2004 Safari6/8/20091672
html.elements.dl πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.dt πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.em πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.align πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.height πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.name πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.src πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.embed.width πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.fieldset πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.Chrome Android: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.Edge: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 4511145.Quest Browser: Before version 12.0, this element did not support flexbox and grid layouts within this element. See bug 41027853.Samsung Internet: Before version 14.0, this element did not support flexbox and grid layouts within this element. See bug 41027853.WebView Android: Before version 86, this element did not support flexbox and grid layouts within this element. See bug 41027853.
html.elements.font πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.font.color Firefox11/9/2004 Safari6/8/20091672
html.elements.font.face Firefox11/9/2004 Safari6/8/20091672
html.elements.font.size Firefox11/9/2004 Safari6/8/20091672
html.elements.hr.align Firefox11/9/2004 Safari6/8/20091672
html.elements.hr.noshade Firefox11/9/2004 Safari6/8/20091672
html.elements.hr.size Firefox11/9/2004 Safari6/8/20091672
html.elements.hr.width Firefox11/9/2004 Safari6/8/20091672
html.elements.iframe πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: The resize CSS property doesn't have any effect on this element due to bug 680823.Firefox for Android: The resize CSS property doesn't have any effect on this element due to bug 680823.Safari: Safari has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.Safari on iOS: Safari on iOS has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.WebView on iOS: WebView on iOS has a bug that prevents iframes from loading if the iframe element was hidden when added to the page. iframeElement.src = iframeElement.src should cause it to load the iframe.
html.elements.iframe.src πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.ins πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.kbd πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, creating a <kbd> element incorrectly resulted in an HTMLSpanElement object, instead of the expected HTMLElement.
html.elements.label πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.label.for πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.legend.align Firefox11/9/2004 Safari6/8/20091672
html.elements.li.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.li.value πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.charset πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.disabled πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Chrome: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Chrome Android: In Chrome Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Edge: Since Edge 79, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Quest Browser: In Quest Browser and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera Android: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Samsung Internet: In Samsung Internet and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.WebView Android: In WebView Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.
html.elements.link.href πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.hreflang πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.media πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.rev πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.target πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.link.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.meta.content πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.meta.http-equiv πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.meta.name πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.meta.scheme πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.nobr πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.noembed πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.ol πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.ol.start πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.ol.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.optgroup πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.optgroup.label πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.option πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.option.disabled πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.option.label πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before 77, Firefox didn't display the value of the label attribute as option text if element's content was empty. See bug 40545.Firefox: Historically, Firefox has allowed keyboard and mouse events to bubble up from the <option> element to the parent <select> element, although this behavior is inconsistent across many browsers. For better Web compatibility (and for technical reasons), they will not bubble up when Firefox is in multi-process mode and the <select> element is displayed as a drop-down list. The behavior is unchanged if the <select> is presented inline and it has either the multiple attribute defined or a size attribute set to more than 1. Rather than watching <option> elements for events, you should watch for change events on <select>. See bug 1090602 for details.Firefox: When Mozilla introduced dedicated content threads to Firefox (through the Electrolysis, or e10s, project), support for styling <option> elements was removed temporarily. Starting in Firefox 54, you can apply foreground and background colors to <option> elements again, using the color and background-color CSS properties. See bug 910022 for more information. Note that this is still disabled in Linux due to lack of contrast (see bug 1338283 for progress on this).Firefox for Android: Before 77, Firefox didn't display the value of the label attribute as option text if element's content was empty. See bug 40545.
html.elements.option.selected πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.option.value πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.param πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.param.name Firefox11/9/2004 Safari6/8/20091672
html.elements.param.type Firefox11/9/2004 Safari6/8/20091672
html.elements.param.value Firefox11/9/2004 Safari6/8/20091672
html.elements.param.valuetype Firefox11/9/2004 Safari6/8/20091672
html.elements.pre πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.s πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.samp πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.script.src πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.script.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.small πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.strike πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.strong πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, creating a <strong> element incorrectly resulted in an HTMLSpanElement object, instead of the expected HTMLElement.
html.elements.sub πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.sup πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.Firefox: A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.Firefox: Before Firefox 89, manipulating the content of <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Firefox for Android: Before Firefox for Android 6, when a <textarea> was focused, the insertion point was placed at the end of the text by default. Other major browsers place the insertion point at the beginning of the text.Firefox for Android: A default background-image gradient is applied to all <textarea> elements, which can be disabled using background-image: none.Firefox for Android: Before Firefox for Android 89, manipulating the content of <textarea> elements using Document.execCommand() commands requires workarounds (see bug 1220696).Safari on iOS: Unlike other major browsers, a default style of opacity: 0.4 is applied to disabled <textarea> elements.WebView on iOS: Unlike other major browsers, a default style of opacity: 0.4 is applied to disabled <textarea> elements.
html.elements.textarea.cols πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea.disabled πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea.form πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea.name πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea.readonly πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.textarea.rows πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.tt πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.ul πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.ul.type πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.var πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.wbr πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.elements.xmp πŸ“‹Firefox11/9/2004 Safari6/8/20091672
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.Firefox for Android: Before Firefox for Android 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.global_attributes.accesskey πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.global_attributes.class πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.global_attributes.contenteditable πŸ“‹Firefox6/17/2008 Safari6/8/2009356
html.global_attributes.dir πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.global_attributes.lang πŸ“‹Firefox11/9/2004 Safari6/8/20091672
html.global_attributes.title πŸ“‹Firefox11/9/2004 Safari6/8/20091672
javascript.builtins.Array.reduce πŸ“‹Firefox6/17/2008 Safari6/8/2009356
javascript.builtins.Array.reduceRight πŸ“‹Firefox6/17/2008 Safari6/8/2009356
javascript.builtins.Date.now πŸ“‹Firefox11/9/2004 Safari6/8/20091672
javascript.builtins.Date.toISOString πŸ“‹Firefox11/9/2004 Safari6/8/20091672
javascript.builtins.Date.toJSON πŸ“‹Firefox11/9/2004 Safari6/8/20091672
javascript.operators.decrement πŸ“‹Firefox11/9/2004 Safari6/8/20091672
javascript.operators.increment πŸ“‹Firefox11/9/2004 Safari6/8/20091672

2008/6

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.transform πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.Document.getElementsByClassName πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.Element.clientLeft πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.Element.clientTop πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.Element.getElementsByClassName πŸ“‹Safari3/18/2008 Firefox6/17/200891
Edge: Only supported for HTMLElement, not all Element objects, such as SVGElement.Firefox: Before Firefox 19, this method was returning a NodeList; it was then changed to reflect the change in the spec.Internet Explorer: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.HTMLElement.contentEditable πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGAElement πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGAElement.target πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGForeignObjectElement πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGForeignObjectElement.height πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGForeignObjectElement.width πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGForeignObjectElement.x πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGForeignObjectElement.y πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGMaskElement πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGMaskElement.height πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGMaskElement.maskContentUnits πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGMaskElement.maskUnits πŸ“‹Safari3/18/2008 Firefox6/17/200891
api.SVGMaskElement.width πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGMaskElement.x πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGMaskElement.y πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.height πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.href πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.patternContentUnits πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.patternTransform πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.patternUnits πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.preserveAspectRatio πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.viewBox πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.width πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.x πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGPatternElement.y πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGSwitchElement πŸ“‹Safari10/26/2007 Firefox6/17/2008235
api.SVGUnitTypes πŸ“‹Safari3/18/2008 Firefox6/17/200891
css.properties.color-interpolation-filters πŸ“‹Safari10/26/2007 Firefox6/17/2008235
css.properties.color-interpolation-filters.auto πŸ“‹Safari10/26/2007 Firefox6/17/2008235
css.properties.display.inline-table Safari6/23/2003 Firefox6/17/20081821
css.properties.min-height πŸ“‹Safari4/15/2005 Firefox6/17/20081159
Firefox: CSS 2.1 leaves the behavior of min-height with table undefined. Firefox supports applying min-height to table elements.Firefox for Android: CSS 2.1 leaves the behavior of min-height with table undefined. Firefox for Android supports applying min-height to table elements.Internet Explorer: In Internet Explorer 10 and 11, a min-height declaration on a column-direction flex container doesn't apply to the container's flex items. See Flexbug #3 for more info.Opera: CSS 2.1 leaves the behavior of min-height with table undefined. Opera supports applying min-height to table elements.
css.properties.text-decoration.blink πŸ“‹Safari6/23/2003 Firefox6/17/20081821
Chrome: The blink value does not have any effect.Chrome Android: The blink value does not have any effect.Firefox: The blink value does not have any effect.Firefox for Android: The blink value does not have any effect.Quest Browser: The blink value does not have any effect.Opera: The blink value does not have any effect.Opera Android: The blink value does not have any effect.Safari: The blink value does not have any effect.Safari on iOS: The blink value does not have any effect.Samsung Internet: The blink value does not have any effect.WebView Android: The blink value does not have any effect.WebView on iOS: The blink value does not have any effect.
css.properties.text-decoration.line-through πŸ“‹Safari6/23/2003 Firefox6/17/20081821
css.properties.text-decoration.none πŸ“‹Safari6/23/2003 Firefox6/17/20081821
css.properties.text-decoration.overline πŸ“‹Safari6/23/2003 Firefox6/17/20081821
css.properties.text-decoration.underline πŸ“‹Safari6/23/2003 Firefox6/17/20081821
css.properties.white-space.pre-wrap πŸ“‹Safari10/26/2007 Firefox6/17/2008235
Internet Explorer: From Internet Explorer 5.5 to 7, word-wrap: break-word; can be used for line breaks in pre elements.
css.properties.z-index.negative_values Safari6/23/2003 Firefox6/17/20081821
css.selectors.first-child πŸ“‹Safari3/18/2008 Firefox6/17/200891
Internet Explorer: Internet Explorer 7 doesn't update :first-child styles when elements are added dynamically.Internet Explorer: In Internet Explorer 8, if an element is inserted dynamically by clicking on a link, then the :first-child style isn't applied until the link loses focus.
css.types.color.named-color.transparent πŸ“‹Safari3/18/2008 Firefox6/17/200891
html.elements.marquee.hspace Safari2/2/2004 Firefox6/17/20081597
html.elements.marquee.loop Safari2/2/2004 Firefox6/17/20081597
html.elements.marquee.truespeed Safari2/2/2004 Firefox6/17/20081597
html.elements.marquee.vspace Safari2/2/2004 Firefox6/17/20081597

2008/3

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.isPointInPath πŸ“‹Firefox10/24/2006 Safari3/18/2008511
api.Document.DOMContentLoaded_event πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.EventTarget.dispatchEvent πŸ“‹Firefox10/24/2006 Safari3/18/2008511
Internet Explorer: Older versions of IE supported an equivalent, proprietary EventTarget.fireEvent() method.
api.HTMLElement.tabIndex πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Edge: Returns incorrect value for elements without an explicit tabindex attribute. See issue 4365703 for details.Internet Explorer: Returns incorrect value for elements without an explicit tabindex attribute. See issue 4365703 for details.
api.SVGTextPathElement πŸ“‹Firefox10/24/2006 Safari3/18/2008511
api.SVGTextPathElement.href πŸ“‹Firefox10/24/2006 Safari3/18/2008511
api.Selection.containsNode πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Firefox: Before Firefox 35, the method didn't throw if node was null.Firefox for Android: Before Firefox for Android 35, the method didn't throw if node was null.
api.Selection.deleteFromDocument πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.Selection.extend πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.Selection.selectAllChildren πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.Window.DOMContentLoaded_event πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.XSLTProcessor πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.clearParameters πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.getParameter πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Chrome: Chrome only supports string values.Chrome Android: Chrome Android only supports string values.Edge: Edge only supports string values.Quest Browser: Quest Browser only supports string values.Opera: Opera only supports string values.Opera Android: Opera only supports string values.Safari: Safari only supports string values.Safari on iOS: Safari on iOS only supports string values.Samsung Internet: Samsung Internet only supports string values.WebView Android: WebView only supports string values.WebView on iOS: WebView on iOS only supports string values.
api.XSLTProcessor.importStylesheet πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.removeParameter πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.reset πŸ“‹Firefox11/9/2004 Safari3/18/20081225
api.XSLTProcessor.setParameter πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Chrome: Chrome only supports string values.Chrome Android: Chrome Android only supports string values.Edge: Edge only supports string values.Quest Browser: Quest Browser only supports string values.Opera: Opera only supports string values.Opera Android: Opera only supports string values.Safari: Safari only supports string values.Safari on iOS: Safari on iOS only supports string values.Samsung Internet: Samsung Internet only supports string values.WebView Android: WebView only supports string values.WebView on iOS: WebView on iOS only supports string values.
api.XSLTProcessor.transformToDocument πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Chrome: Chrome returns null if an error occurs.Chrome Android: Chrome Android returns null if an error occurs.Edge: Edge returns null if an error occurs.Firefox: Firefox throws an exception if an error occurs.Firefox for Android: Firefox for Android throws an exception if an error occurs.Quest Browser: Quest Browser returns null if an error occurs.Opera: Opera 12.1 and earlier throws an exception if an error occurs.Opera: Opera 15 and later returns null if an error occurs.Opera Android: Opera Android 12.1 and earlier throws an exception if an error occurs.Opera Android: Opera Android 14 and later returns null if an error occurs.Safari: Safari returns null if an error occurs.Safari on iOS: Safari on iOS returns null if an error occurs.Samsung Internet: Samsung Internet returns null if an error occurs.WebView Android: WebView returns null if an error occurs.WebView on iOS: WebView on iOS returns null if an error occurs.
api.XSLTProcessor.transformToFragment πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Chrome: Chrome returns null if an error occurs.Chrome Android: Chrome Android returns null if an error occurs.Edge: Edge returns null if an error occurs.Firefox: Firefox throws an exception if an error occurs.Firefox for Android: Firefox for Android throws an exception if an error occurs.Quest Browser: Quest Browser returns null if an error occurs.Opera: Opera 12.1 and earlier throws an exception if an error occurs.Opera: Opera 15 and later returns null if an error occurs.Opera Android: Opera Android 12.1 and earlier throws an exception if an error occurs.Opera Android: Opera Android 14 and later returns null if an error occurs.Safari: Safari returns null if an error occurs.Safari on iOS: Safari on iOS returns null if an error occurs.Samsung Internet: Samsung Internet returns null if an error occurs.WebView Android: WebView returns null if an error occurs.WebView on iOS: WebView on iOS returns null if an error occurs.
css.properties.text-align.end πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.properties.text-align.start πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.checked πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Chrome: On macOS, styling <option> elements has no effect.Edge: On macOS, styling <option> elements has no effect.Firefox: From Firefox 56, <option> elements cannot be styled.Firefox: On macOS, styling <option> elements has no effect.Firefox for Android: From Firefox 56, <option> elements cannot be styled.Opera: On macOS, styling <option> elements has no effect.Safari: Styling <option> elements has no effect.Safari on iOS: Styling <option> elements has no effect.WebView on iOS: Styling <option> elements has no effect.
css.selectors.disabled πŸ“‹Firefox11/9/2004 Safari3/18/20081225
Edge: Before Edge 79, Edge did not recognize :disabled on the <fieldset> element.Internet Explorer: Internet Explorer does not recognize :disabled on the <fieldset> element.
css.selectors.empty πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.enabled πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.lang πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.last-child πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.not πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.selectors.only-child πŸ“‹Firefox11/29/2005 Safari3/18/2008840
css.types.attr πŸ“‹Firefox11/9/2004 Safari3/18/20081225
css.types.color.hsl πŸ“‹Firefox11/9/2004 Safari3/18/20081225
html.elements.link.rel.icon Firefox10/24/2006 Safari3/18/2008511
Chrome: If both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.).Edge: In version 79 and later (Blink-based Edge), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Firefox: Before Firefox 83, the crossorigin attribute is not supported for rel="icon".Firefox: The media attribute is not supported for rel="icon", see bug 1603885.Opera: In version 15 and later (Blink-based Opera), if both ICO and PNG are available, will use ICO over PNG if ICO has better matching sizes set. (Per caniuse.com.)Safari: If both ICO and PNG are available, will ALWAYS use ICO file, regardless of sizes set. (Per caniuse.com.)Safari on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.)WebView on iOS: Does not use favicons at all (but may have alternative for bookmarks, etc.). (Per caniuse.com.)
html.global_attributes.tabindex πŸ“‹Firefox11/29/2005 Safari3/18/2008840
http.data-url πŸ“‹Firefox10/24/2006 Safari3/18/2008511
Edge: Before Edge 79, the maximum size supported is 4GB.Internet Explorer: Since Internet Explorer 9, the maximum size supported is 4GB.Internet Explorer: In Internet Explorer 8, the maximum size supported is 32kB.
http.data-url.css_files Firefox10/24/2006 Safari3/18/2008511
http.data-url.html_files Firefox10/24/2006 Safari3/18/2008511
http.data-url.js_files Firefox10/24/2006 Safari3/18/2008511
javascript.builtins.RegExp.compile πŸ“‹Firefox11/9/2004 Safari3/18/20081225
javascript.operators.void πŸ“‹Firefox11/9/2004 Safari3/18/20081225

2007/10

API First Browser Date Last Browser Date Days Notes
api.BarProp πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.BarProp.visible πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.CDATASection πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.CSSMediaRule πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Before Firefox 20, conditionText could not be set.Firefox for Android: Before Firefox for Android 20, conditionText could not be set.
api.CSSMediaRule.media πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.CanvasRenderingContext2D.arc πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.CanvasRenderingContext2D.canvas πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.CanvasRenderingContext2D.quadraticCurveTo πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.Comment πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.adoptNode πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.characterSet πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Chrome: charset alias was made read-only in Chrome 45.Chrome Android: charset alias was made read-only in Chrome Android 45.Quest Browser: charset alias was made read-only in Quest Browser 5.0.Opera: charset alias was made read-only in Opera 45.Opera Android: charset alias was made read-only in Opera 45.Samsung Internet: charset alias was made read-only in Samsung Internet 5.0.WebView Android: charset alias was made read-only in WebView 45.
api.Document.createExpression πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.createNSResolver πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.createNodeIterator πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.createTreeWalker πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.documentURI πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Document.evaluate πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.DocumentFragment πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.DocumentType πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.DocumentType.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.DocumentType.publicId πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.DocumentType.systemId πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Element.clientHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Element.clientWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Element.scrollIntoView πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Edge: The only parameter supported is alignToTop.Edge: Only supported for HTMLElement, not all Element objects, such as SVGElement.Edge: No support for smooth behavior.Internet Explorer: Only supported for HTMLElement, not all Element objects, such as SVGElement.Internet Explorer: No support for smooth behavior or center options.Safari: No support for center option.Safari: Before Safari 15.4, there was no support for the smooth behavior.Safari on iOS: No support for center option.Safari on iOS: Before iOS 15.4, there was no support for the smooth behavior.WebView on iOS: No support for center option.WebView on iOS: Before iOS 15.4, there was no support for the smooth behavior.
api.HTMLBRElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBRElement.clear πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBaseElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBaseElement.href πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBaseElement.target πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.aLink πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.background πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.bgColor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.link πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.text πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLBodyElement.vLink πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement.disabled πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLButtonElement.value πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLCanvasElement.height πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.HTMLCanvasElement.width πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.HTMLDListElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLDListElement.compact πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLDivElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLDivElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.blur πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.HTMLElement.change_event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.dir πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.focus πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If there's no hardware keyboard connected and the user has not yet interacted with the page, then calling focus() on an <input> element has no effect (for example, the element does not match the :focus selector).WebView on iOS: If there's no hardware keyboard connected and the user has not yet interacted with the page, then calling focus() on an <input> element has no effect (for example, the element does not match the :focus selector).
api.HTMLElement.lang πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.offsetHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.offsetLeft πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.offsetParent πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.offsetTop πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.offsetWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.style πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLElement.title πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Chrome: Starting with Chrome 58, this interface can no longer be called as a function.Chrome Android: Starting with Chrome Android 58, this interface can no longer be called as a function.Quest Browser: Starting with Quest Browser 5.0, this interface can no longer be called as a function.Opera: Starting with Opera 45, this interface can no longer be called as a function.Opera Android: Starting with Opera 45, this interface can no longer be called as a function.Samsung Internet: Starting with Samsung Internet 7.0, this interface can no longer be called as a function.WebView Android: Starting with WebView Android 58, this interface can no longer be called as a function.
api.HTMLEmbedElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement.getSVGDocument πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.HTMLEmbedElement.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement.src πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLEmbedElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFieldSetElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFieldSetElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFontElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFontElement.color πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFontElement.face πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFontElement.size πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormControlsCollection πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.acceptCharset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.action πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.elements πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.encoding πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.enctype πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.length πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.method πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.reset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.submit πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.submit_event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFormElement.target πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.contentDocument πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.contentWindow πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.frameBorder πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.longDesc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.marginHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.marginWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.noResize πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.scrolling πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameElement.src πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameSetElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameSetElement.cols πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLFrameSetElement.rows πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLHeadingElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLHeadingElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.contentDocument πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.contentWindow πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.frameBorder πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.longDesc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.marginHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.marginWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.scrolling πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.src πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLIFrameElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.alt πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.border πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.complete πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Internet Explorer: IE reports false for broken images.
api.HTMLImageElement.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.hspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.isMap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.longDesc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.lowsrc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.naturalHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.naturalWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.src πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.useMap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.vspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLImageElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLInputElement.setSelectionRange πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLLabelElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLLabelElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLLabelElement.htmlFor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLMapElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLMapElement.areas πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLMapElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLMenuElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLMenuElement.compact πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLModElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLModElement.cite πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLModElement.dateTime πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOListElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOListElement.compact πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOListElement.start πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOListElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.archive πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.border πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.code πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.codeBase πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.codeType πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.contentDocument πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.data πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.declare πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.hspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.standby πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.useMap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.vspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLObjectElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptGroupElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptGroupElement.label πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.defaultSelected πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.disabled πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.index πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.selected πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.text πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionElement.value πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionsCollection πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionsCollection.add πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionsCollection.length πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLOptionsCollection.selectedIndex πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParagraphElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParagraphElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParamElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParamElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParamElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParamElement.value πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLParamElement.valueType πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLPreElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLPreElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLQuoteElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLQuoteElement.cite πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.charset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.htmlFor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.src πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.text πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.textContent πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLScriptElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.add πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.disabled πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.item πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.length πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.multiple πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.namedItem πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Edge: namedItem does not appear to take the name attribute into account (only the id attribute) on Internet Explorer and Edge. There is a bug report to Microsoft about this.Internet Explorer: namedItem does not appear to take the name attribute into account (only the id attribute) on Internet Explorer and Edge. There is a bug report to Microsoft about this.
api.HTMLSelectElement.options πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.remove πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.selectedIndex πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.size πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLSelectElement.value πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCaptionElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCaptionElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.abbr πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.axis πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.bgColor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.cellIndex πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.ch πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.chOff πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.colSpan πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.headers πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.noWrap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.rowSpan πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.scope πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.vAlign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableCellElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.ch πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.chOff πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.span πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.vAlign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableColElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.bgColor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.border πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.caption πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.cellPadding πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.cellSpacing πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.createCaption πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.createTFoot πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.createTHead πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.deleteCaption πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.deleteRow πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.deleteTFoot πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.deleteTHead πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.frame πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.rows πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.rules πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.summary πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.tBodies πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.tFoot πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.tHead πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableElement.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.bgColor πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.cells πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.ch πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.chOff πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.deleteCell πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.insertCell πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.rowIndex πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.sectionRowIndex πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableRowElement.vAlign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.ch πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.chOff πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.deleteRow πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.insertRow πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.rows πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTableSectionElement.vAlign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTitleElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLTitleElement.text πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLUListElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLUListElement.compact πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.HTMLUListElement.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Location.assign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Deno: This method exists but has no effect in Deno. A location can be assigned using the --location runtime flag.
api.Navigator.vendorSub πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Node.isDefaultNamespace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Node.isEqualNode πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Node.lookupNamespaceURI πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Node.lookupPrefix πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Node.textContent πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Range.comparePoint πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Range.isPointInRange πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.SVGAngle πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.convertToSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.newValueSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.unitType πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.value πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.valueAsString πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAngle.valueInSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedAngle πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedAngle.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedAngle.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedEnumeration πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedEnumeration.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedEnumeration.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLength.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLength.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLengthList πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLengthList.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedLengthList.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedNumber πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedNumber.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedNumber.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedRect πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedString πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedString.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedString.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedTransformList πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedTransformList.animVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGAnimatedTransformList.baseVal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGCircleElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGCircleElement.cx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGCircleElement.cy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGCircleElement.r πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGClipPathElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGClipPathElement.clipPathUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGClipPathElement.transform πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGDefsElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGDescElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGElement.className πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGElement.ownerSVGElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGElement.style πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGElement.viewportElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGEllipseElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGEllipseElement.cx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGEllipseElement.cy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGEllipseElement.rx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGEllipseElement.ry πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGradientElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGradientElement.gradientTransform πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGradientElement.gradientUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGradientElement.href πŸ“‹Firefox10/24/2006 Safari10/26/2007367
api.SVGGradientElement.spreadMethod πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGraphicsElement.getBBox πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Firefox: Before Firefox 128, the getBBox() method returned an empty DOMRect when there is no fill (bug 1019326).Firefox: Before Firefox 68, this method didn't work for <textPath> and <tspan> elements (bug 937268).Firefox for Android: Before Firefox for Android 128, the getBBox() method returned an empty DOMRect when there is no fill (bug 1019326).Firefox for Android: Before Firefox for Android 68, this method didn't work for <textPath> and <tspan> elements (bug 937268).
api.SVGGraphicsElement.getCTM πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGGraphicsElement.getScreenCTM πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari: Transforms on the parent are not propagated down to its children; see bug 209220.Safari on iOS: Transforms on the parent are not propagated down to its children; see bug 209220.WebView on iOS: Transforms on the parent are not propagated down to its children; see bug 209220.
api.SVGGraphicsElement.transform πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.height πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.href πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.preserveAspectRatio πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.width πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGImageElement.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.convertToSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.newValueSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.unitType πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.value πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.valueAsString πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLength.valueInSpecifiedUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.appendItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.clear πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.getItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.initialize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.insertItemBefore πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.numberOfItems πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.removeItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLengthList.replaceItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLineElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLineElement.x1 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLineElement.x2 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLineElement.y1 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLineElement.y2 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLinearGradientElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLinearGradientElement.x1 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLinearGradientElement.x2 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLinearGradientElement.y1 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGLinearGradientElement.y2 πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.markerHeight πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.markerUnits πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.markerWidth πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.orientAngle πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.orientType πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.preserveAspectRatio πŸ“‹Firefox10/24/2006 Safari10/26/2007367
api.SVGMarkerElement.refX πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.refY πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.setOrientToAngle πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.setOrientToAuto πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGMarkerElement.viewBox πŸ“‹Firefox10/24/2006 Safari10/26/2007367
api.SVGMetadataElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGNumber πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGNumber.value πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPathElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPathElement.getPointAtLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPathElement.getTotalLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPathElement.pathLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPoint πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPoint.matrixTransform πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPoint.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPoint.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.appendItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.clear πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.getItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.initialize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.insertItemBefore πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.numberOfItems πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.removeItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPointList.replaceItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolygonElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolygonElement.animatedPoints πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolygonElement.points πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolylineElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolylineElement.animatedPoints πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPolylineElement.points πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPreserveAspectRatio πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPreserveAspectRatio.align πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGPreserveAspectRatio.meetOrSlice πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement.cx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement.cy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement.fx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement.fy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRadialGradientElement.r πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRect πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRect.height Firefox11/29/2005 Safari10/26/2007696
api.SVGRect.width Firefox11/29/2005 Safari10/26/2007696
api.SVGRect.x Firefox11/29/2005 Safari10/26/2007696
api.SVGRect.y Firefox11/29/2005 Safari10/26/2007696
api.SVGRectElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRectElement.height πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRectElement.width πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRectElement.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGRectElement.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.animationsPaused πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGAngle πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGMatrix πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGNumber πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGPoint πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGRect πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGTransform πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.createSVGTransformFromMatrix πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.currentScale πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.currentTranslate πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.forceRedraw πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.getCurrentTime πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.height πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.pauseAnimations πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.preserveAspectRatio πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.setCurrentTime πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.suspendRedraw πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.unpauseAnimations πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.unsuspendRedraw πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.unsuspendRedrawAll πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.viewBox πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.width πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSVGElement.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGScriptElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGScriptElement.href πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGScriptElement.type πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStopElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStopElement.offset πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStyleElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStyleElement.media πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStyleElement.title πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGStyleElement.type πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSymbolElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSymbolElement.preserveAspectRatio πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGSymbolElement.viewBox πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTSpanElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getCharNumAtPosition πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getComputedTextLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getEndPositionOfChar πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getExtentOfChar πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getNumberOfChars πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getRotationOfChar πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getStartPositionOfChar πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.getSubStringLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.lengthAdjust πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.selectSubString πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextContentElement.textLength πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement.dx πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement.dy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement.rotate πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTextPositioningElement.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTitleElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.appendItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.clear πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.consolidate πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.createSVGTransformFromMatrix πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.getItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.initialize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.insertItemBefore πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.numberOfItems πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.removeItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGTransformList.replaceItem πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement.height πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement.href πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement.width πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement.x πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.SVGUseElement.y πŸ“‹Firefox11/29/2005 Safari10/26/2007696
api.Selection.addRange πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Selection.getRangeAt πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Selection.rangeCount πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Selection.removeAllRanges πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.beforeunload_event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.beforeunload_event.return_string_activation Firefox11/9/2004 Safari10/26/20071081
api.Window.find Firefox11/9/2004 Safari10/26/20071081
api.Window.frameElement πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.getComputedStyle πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Before version 62 this function returned null when called on a Window with no presentation (e.g. an iframe with display: none; set). Since 62 it returns a CSSStyleDeclaration object with length 0, containing empty strings (bug 1467722; also see bug 1471231 for further work).Firefox for Android: Before version 62 this function returned null when called on a Window with no presentation (e.g. an iframe with display: none; set). Since 62 it returns a CSSStyleDeclaration object with length 0, containing empty strings (bug 1467722; also see bug 1471231 for further work).
api.Window.innerHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: From version 4 to 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).Firefox for Android: Before version 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).Safari on iOS: This property returns the height of the visual viewport instead of the layout viewport. See bug 174362 for details.WebView on iOS: This property returns the height of the visual viewport instead of the layout viewport. See bug 174362 for details.
api.Window.innerWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: From version 4 to 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).Firefox for Android: Before version 24, this property could give a wrong value before page load in certain circumstances (see bug 641188).Safari on iOS: This property returns the width of the visual viewport instead of the layout viewport. See bug 174362 for details.WebView on iOS: This property returns the width of the visual viewport instead of the layout viewport. See bug 174362 for details.
api.Window.locationbar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.menubar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.outerHeight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.outerWidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.personalbar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.scrollbars πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.self πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.statusbar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.stop πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.toolbar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.top πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Starting in Firefox 6, this property is read only, as defined by the standard.
api.Window.unload_event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.Window.window πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XMLHttpRequest.XMLHttpRequest πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XMLHttpRequest.progress_event πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XMLHttpRequest.responseXML πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Before Firefox 51, an error parsing the received data added a <parsererror> node to the top of the Document and then returned the Document in whatever state it happens to be in. This was inconsistent with the specification. Starting with Firefox 51, this scenario now correctly returns null as per the spec.Firefox for Android: Before Firefox for Android 51, an error parsing the received data added a <parsererror> node to the top of the Document and then returned the Document in whatever state it happens to be in. This was inconsistent with the specification. Starting with Firefox for Android 51, this scenario now correctly returns null as per the spec.
api.XMLSerializer πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XMLSerializer.XMLSerializer πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XMLSerializer.serializeToString πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathEvaluator πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathEvaluator.XPathEvaluator πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathEvaluator.createExpression πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathEvaluator.createNSResolver πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathEvaluator.evaluate πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathExpression πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathExpression.evaluate πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.booleanValue πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.invalidIteratorState πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.iterateNext πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.numberValue πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.resultType πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.singleNodeValue πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.snapshotItem πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.snapshotLength πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.XPathResult.stringValue πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.atob πŸ“‹Firefox11/9/2004 Safari10/26/20071081
api.btoa πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.at-rules.media πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.at-rules.media.color πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.device-aspect-ratio πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.device-height πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.device-width πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.grid πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.height πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.media_features Firefox11/9/2004 Safari10/26/20071081
css.at-rules.media.monochrome πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.at-rules.media.width πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.properties.appearance.button πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.checkbox πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.listbox πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.menulist πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.meter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.progress-bar πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.radio πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.searchfield πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.textarea πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.appearance.textfield πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.box-sizing.border-box πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.box-sizing.content-box πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.column-count.auto πŸ“‹Firefox11/29/2005 Safari10/26/2007696
css.properties.column-gap πŸ“‹Firefox11/29/2005 Safari10/26/2007696
css.properties.column-gap.normal πŸ“‹Firefox11/29/2005 Safari10/26/2007696
css.properties.column-width.auto Firefox11/29/2005 Safari10/26/2007696
css.properties.counter-increment πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.counter-increment.none πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.counter-reset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.counter-reset.none πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.cursor.alias πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.all-scroll πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.cell πŸ“‹Firefox11/29/2005 Safari10/26/2007696
css.properties.cursor.col-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.context-menu πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Chrome: This cursor is only supported on macOS and Linux.Chrome Android: This cursor is only supported on macOS and Linux.Firefox: This cursor is only supported on macOS and Linux.Quest Browser: This cursor is only supported on macOS and Linux.Opera Android: This cursor is only supported on macOS and Linux.Safari on iOS: If this value is used, the iPad will display the default pointer instead.Samsung Internet: This cursor is only supported on macOS and Linux.WebView Android: This cursor is only supported on macOS and Linux.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.copy πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.ew-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.nesw-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.no-drop πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.not-allowed πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.ns-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.nwse-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.row-resize πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.url Firefox11/29/2005 Safari10/26/2007696
Firefox: Firefox 4 added macOS support.
css.properties.cursor.url_positioning_syntax Firefox11/29/2005 Safari10/26/2007696
Firefox: Firefox 4 added macOS support.Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.cursor.vertical-text πŸ“‹Firefox11/29/2005 Safari10/26/2007696
Safari on iOS: If this value is used, the iPad will display the default pointer instead.WebView on iOS: If this value is used, the iPad will display the default pointer instead.
css.properties.overflow.auto πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.overflow.hidden πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.overflow.scroll πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.properties.overflow.visible πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.selectors.attribute πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.selectors.indeterminate πŸ“‹Firefox10/24/2006 Safari10/26/2007367
css.selectors.namespace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.selectors.subsequent-sibling πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Internet Explorer: Before Internet Explorer 10, the combinator only works in standards mode.
css.types.counter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
css.types.counters πŸ“‹Firefox11/29/2005 Safari10/26/2007696
html.elements.base πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Internet Explorer: Before Internet Explorer 7, <base> can be positioned anywhere in the document and the nearest value of <base> is used.
html.elements.base.href πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.base.target πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.col.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.col.valign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.colgroup.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.colgroup.valign πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.del.cite Firefox11/9/2004 Safari10/26/20071081
html.elements.del.datetime Firefox11/9/2004 Safari10/26/20071081
html.elements.div.align Firefox11/9/2004 Safari10/26/20071081
html.elements.fieldset.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.accept-charset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.action πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.enctype πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.method πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.form.target πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.frame πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.frameborder Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.marginheight Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.marginwidth Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.name Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.noresize Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.scrolling Firefox11/9/2004 Safari10/26/20071081
html.elements.frame.src Firefox11/9/2004 Safari10/26/20071081
html.elements.frameset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.frameset.cols Firefox11/9/2004 Safari10/26/20071081
html.elements.frameset.rows Firefox11/9/2004 Safari10/26/20071081
html.elements.hr πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.frameborder πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.longdesc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.marginheight πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.marginwidth πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.scrolling πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.iframe.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.align πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.alt πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.border πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.hspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.ismap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.longdesc πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.usemap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.vspace πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.img.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.ins.cite Firefox11/9/2004 Safari10/26/20071081
html.elements.ins.datetime Firefox11/9/2004 Safari10/26/20071081
html.elements.legend πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.li πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.menu πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.meta.charset πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.noframes πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.noscript πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.archive πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.border πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.classid πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.codetype πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.data πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.declare πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.height πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.standby πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.type πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.usemap πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.object.width πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.ol.compact Firefox11/9/2004 Safari10/26/20071081
html.elements.pre.width Firefox11/9/2004 Safari10/26/20071081
Chrome: Specifying the width attribute has no layout effect.Chrome Android: Specifying the width attribute has no layout effect.Edge: Specifying the width attribute has no layout effect.Firefox: Since Firefox 29, specifying the width attribute has no layout effect.Firefox for Android: Since Firefox for Android 29, specifying the width attribute has no layout effect.Internet Explorer: Specifying the width attribute has no layout effect.Quest Browser: Specifying the width attribute has no layout effect.Opera: Specifying the width attribute has no layout effect.Opera Android: Specifying the width attribute has no layout effect.Safari: Specifying the width attribute has no layout effect.Safari on iOS: Specifying the width attribute has no layout effect.Samsung Internet: Specifying the width attribute has no layout effect.WebView Android: Specifying the width attribute has no layout effect.WebView on iOS: Specifying the width attribute has no layout effect.
html.elements.q πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.q.cite πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.script πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Starting in Firefox 4, inserting <script> elements that have been created by calling document.createElement("script") no longer enforces execution in insertion order. This change lets Firefox properly abide by the specification. To make script-inserted external scripts execute in their insertion order, set .async=false on them.
html.elements.select.disabled πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.select.form πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.select.multiple πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.select.name πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.select.size πŸ“‹Firefox11/9/2004 Safari10/26/20071081
html.elements.tbody.align Firefox11/9/2004 Safari10/26/20071081
html.elements.tbody.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.td.align Firefox11/9/2004 Safari10/26/20071081
html.elements.td.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.tfoot.align Firefox11/9/2004 Safari10/26/20071081
html.elements.tfoot.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.th.align Firefox11/9/2004 Safari10/26/20071081
html.elements.th.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.thead.align Firefox11/9/2004 Safari10/26/20071081
html.elements.thead.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.tr.align Firefox11/9/2004 Safari10/26/20071081
html.elements.tr.valign Firefox11/9/2004 Safari10/26/20071081
html.elements.ul.compact πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Array.every πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.filter πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.forEach πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.indexOf πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.lastIndexOf πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.map πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Array.some πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.builtins.Function.caller Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.defineGetter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Starting with Firefox 48, this method can no longer be called at the global scope without any object. A TypeError will be thrown otherwise. Previously, the global object was used in these cases automatically, but this is no longer the case.
javascript.builtins.Object.defineSetter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
Firefox: Starting with Firefox 48, this method can no longer be called at the global scope without any object. A TypeError will be thrown otherwise. Previously, the global object was used in these cases automatically, but this is no longer the case.
javascript.builtins.Object.hasOwnProperty πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.isPrototypeOf πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.lookupGetter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.lookupSetter πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.propertyIsEnumerable πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.Object.proto πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.RegExp.input πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.RegExp.lastMatch πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.RegExp.lastParen πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.RegExp.leftContext πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.RegExp.rightContext πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.builtins.String.localeCompare πŸ“‹Firefox11/9/2004 Safari10/26/20071081
javascript.functions.get πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.functions.set πŸ“‹Firefox11/29/2005 Safari10/26/2007696
javascript.grammar.trailing_commas.trailing_commas_in_object_literals Firefox11/9/2004 Safari10/26/20071081

2005/11

API First Browser Date Last Browser Date Days Notes
api.CanvasGradient πŸ“‹Safari4/29/2005 Firefox11/29/2005214
Firefox: Before Firefox 5.0, specifying non-finite values when adding color stops through a call to addColorStop() incorrectly throws SYNTAX_ERR instead of INDEX_SIZE_ERR.
api.CanvasGradient.addColorStop πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasPattern πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.arcTo πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.beginPath πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.bezierCurveTo πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.clearRect πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.clip πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.closePath πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.createLinearGradient πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.createPattern πŸ“‹Safari4/29/2005 Firefox11/29/2005214
Firefox: The repetition values repeat-x and repeat-y are not supported with fill(), only with fillRect(), see bug 468358.Firefox for Android: The repetition values repeat-x and repeat-y are not supported with fill(), only with fillRect(), see bug 468358.
api.CanvasRenderingContext2D.createRadialGradient πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.drawImage πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.fill πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.fillRect πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.fillStyle πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.globalAlpha πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.globalCompositeOperation πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.lineCap πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.lineJoin πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.lineTo πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.lineWidth πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.miterLimit πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.moveTo πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.rect πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.restore πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.rotate πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.save πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.scale πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.shadowBlur πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.shadowColor πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.shadowOffsetX πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.shadowOffsetY πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.stroke πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.strokeRect πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.strokeStyle πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.CanvasRenderingContext2D.translate πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.Event.bubbles πŸ“‹Safari6/23/2003 Firefox11/29/2005890
Node.js: This is not used in Node.js and is provided purely for completeness.
api.Event.cancelable πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.Event.eventPhase πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.Event.timeStamp πŸ“‹Safari6/23/2003 Firefox11/29/2005890
Chrome: Starting with Chrome 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Chrome Android: Starting with Chrome Android 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Deno: In Deno this represents the time since UNIX epoch, not since startup. This is considered a bug, see #10835.Firefox: Starting with Chrome 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Firefox for Android: Starting with Chrome 49, Firefox for Android 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Internet Explorer: Starting with Chrome 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Quest Browser: Starting with Quest Browser 5.0, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Opera: Starting with Chrome 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Opera Android: Starting with Chrome 49, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.Samsung Internet: Starting with Samsung Internet 5.0, Firefox 54 and Opera 36, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.WebView Android: Starting with version 49, this property returns DOMHighResTimeStamp instead of DOMTimeStamp.
api.Event.type πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.HTMLCanvasElement πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.HTMLCanvasElement.getContext πŸ“‹Safari4/29/2005 Firefox11/29/2005214
api.HTMLCanvasElement.getContext.2d_context Safari4/29/2005 Firefox11/29/2005214
api.KeyboardEvent πŸ“‹Safari2/2/2004 Firefox11/29/2005666
api.KeyboardEvent.altKey πŸ“‹Safari2/2/2004 Firefox11/29/2005666
api.KeyboardEvent.charCode πŸ“‹Safari2/2/2004 Firefox11/29/2005666
api.KeyboardEvent.ctrlKey πŸ“‹Safari2/2/2004 Firefox11/29/2005666
api.KeyboardEvent.keyCode πŸ“‹Safari2/2/2004 Firefox11/29/2005666
Chrome: When selecting an autocomplete suggestion, a keydown event fires where the event's keyCode property is undefined. See bug 41425904.Chrome Android: When selecting an autocomplete suggestion, a keydown event fires where the event's keyCode property is undefined. See bug 41425904.Quest Browser: When selecting an autocomplete suggestion, a keydown event fires where the event's keyCode property is undefined. See bug 41425904.Samsung Internet: When selecting an autocomplete suggestion, a keydown event fires where the event's keyCode property is undefined. See bug 41425904.WebView Android: When selecting an autocomplete suggestion, a keydown event fires where the event's keyCode property is undefined. See bug 41425904.
api.KeyboardEvent.metaKey πŸ“‹Safari2/2/2004 Firefox11/29/2005666
Firefox: Since Firefox 48, the Windows key is no longer treated as a meta key.Firefox for Android: Since Firefox for Android 48, the Windows key is no longer treated as a meta key.
api.KeyboardEvent.shiftKey πŸ“‹Safari2/2/2004 Firefox11/29/2005666
api.MouseEvent.altKey πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.clientY πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.ctrlKey πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.initMouseEvent πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.metaKey πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.pageX πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.pageY πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.relatedTarget πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.screenX πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.screenY πŸ“‹Safari6/23/2003 Firefox11/29/2005890
api.MouseEvent.shiftKey πŸ“‹Safari6/23/2003 Firefox11/29/2005890
css.properties.outline-color πŸ“‹Safari2/2/2004 Firefox11/29/2005666
css.properties.outline-offset πŸ“‹Safari2/2/2004 Firefox11/29/2005666
Firefox: Before Firefox 88, an outline does not follow the shape of border-radius.Firefox for Android: Before Firefox for Android 88, an outline does not follow the shape of border-radius.
css.properties.outline-style πŸ“‹Safari2/2/2004 Firefox11/29/2005666
Firefox: Before Firefox 88, an outline does not follow the shape of border-radius.Firefox for Android: Before Firefox for Android 88, an outline does not follow the shape of border-radius.
css.properties.outline-style.auto πŸ“‹Safari2/2/2004 Firefox11/29/2005666
css.properties.outline-width πŸ“‹Safari2/2/2004 Firefox11/29/2005666
Firefox: Before Firefox 88, an outline does not follow the shape of border-radius.Firefox for Android: Before Firefox for Android 88, an outline does not follow the shape of border-radius.
html.elements.canvas πŸ“‹Safari4/29/2005 Firefox11/29/2005214
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.
html.elements.canvas.height πŸ“‹Safari4/29/2005 Firefox11/29/2005214
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.
html.elements.canvas.width πŸ“‹Safari4/29/2005 Firefox11/29/2005214
Firefox: Before Firefox 5, the canvas width and height were signed integers instead of unsigned integers.Firefox: Before Firefox 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox: Before Firefox 12, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Firefox for Android: Before Firefox for Android 5, the canvas width and height were signed integers instead of unsigned integers.Firefox for Android: Before Firefox for Android 6, a <canvas> element with a zero width or height would be rendered as if it had default dimensions.Firefox for Android: Before Firefox for Android 14, if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Since then, the fallback content is rendered instead.Safari: Although early versions of Apple's Safari browser don't require the closing tag, the specification indicates that it is required, so you should be sure to include it for broadest compatibility. Before version 2, Safari will render the content of the fallback in addition to the canvas itself unless you use CSS tricks to mask it.

2005/4

API First Browser Date Last Browser Date Days Notes
css.properties.opacity πŸ“‹Firefox11/9/2004 Safari4/29/2005171
css.properties.user-select.auto Firefox11/9/2004 Safari4/29/2005171
css.properties.user-select.text Firefox11/9/2004 Safari4/29/2005171
css.selectors.hover πŸ“‹Firefox11/9/2004 Safari4/29/2005171
Safari on iOS: As of Safari for iOS 7.1.2, tapping a clickable element causes the element to enter the :hover state. The element will remain in the :hover state until a different element has entered the :hover state.WebView on iOS: As of Safari for iOS 7.1.2, tapping a clickable element causes the element to enter the :hover state. The element will remain in the :hover state until a different element has entered the :hover state.
css.selectors.hover.a_elements Firefox11/9/2004 Safari4/29/2005171
css.selectors.hover.all_elements Firefox11/9/2004 Safari4/29/2005171
Edge: In Edge, hovering over an element and then scrolling up or down without moving the pointer will leave the element in the :hover state until the pointer is moved.Internet Explorer: In Internet Explorer 8 to Internet Explorer 11, hovering over an element and then scrolling up or down without moving the pointer will leave the element in the :hover state until the pointer is moved. See bug 926665.Internet Explorer: In Internet Explorer 9 (and possibly earlier), if a <table> has a parent with a non-auto width, overflow-x: auto;, the <table> has enough content to horizontally overflow its parent, and there are :hover styles set on elements within the table, then hovering over said elements will cause the <table>'s height to increase. See a live demo that triggers the bug. One workaround for the bug is to set min-height: 0%; (the % unit must be specified, since unitless and px don't work) on the <table>'s parent element.
javascript.builtins.Number.toExponential πŸ“‹Firefox11/9/2004 Safari4/29/2005171
javascript.builtins.Number.toFixed πŸ“‹Firefox11/9/2004 Safari4/29/2005171
javascript.builtins.Number.toPrecision πŸ“‹Firefox11/9/2004 Safari4/29/2005171
api.DOMParser πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.DOMParser.DOMParser πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.DOMParser.parseFromString πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.DOMParser.parseFromString.xml Firefox11/9/2004 Safari4/15/2005157
api.Document.execCommand.insertHTML Firefox11/9/2004 Safari4/15/2005157
api.HTMLElement.load_event πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.HTMLInputElement.selectionEnd πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.HTMLInputElement.selectionStart πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.HTMLTextAreaElement.selectionEnd πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.HTMLTextAreaElement.selectionStart πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.HTMLTextAreaElement.setSelectionRange πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.anchorNode πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.anchorOffset πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.collapse πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.collapseToEnd πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.collapseToStart πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.focusNode πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.focusOffset πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.isCollapsed πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Selection.toString πŸ“‹Firefox11/9/2004 Safari4/15/2005157
Firefox: Before Firefox 139, toString() returns an empty string for selected texts in form elements. See bug 85686.Firefox for Android: Before Firefox for Android 139, toString() returns an empty string for selected texts in form elements. See bug 85686.
api.Window.load_event πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.Window.parent πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.XMLHttpRequest.error_event πŸ“‹Firefox11/9/2004 Safari4/15/2005157
api.XMLHttpRequest.load_event πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.max-height πŸ“‹Firefox11/9/2004 Safari4/15/2005157
Firefox: CSS 2.1 leaves the behavior of max-height with table undefined. Firefox supports applying max-height to table elements.Opera: CSS 2.1 leaves the behavior of max-height with table undefined. Opera supports applying max-height to table elements.
css.properties.max-height.none πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.unicode-bidi πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.unicode-bidi.bidi-override πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.unicode-bidi.embed πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.unicode-bidi.normal πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.properties.visibility.collapse πŸ“‹Firefox11/9/2004 Safari4/15/2005157
Chrome: Before Chrome 62, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Chrome: Before Chrome 92, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Chrome: Since Chrome 92, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Chrome Android: Before Chrome Android 62, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Chrome Android: Before Chrome Android 92, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Chrome Android: Since Chrome Android 92, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Edge: For Edge 79 through Edge 91, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Edge: Since Edge 92, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Firefox: Firefox doesn't hide borders when hiding <col> and <colgroup> elements if border-collapse: collapse is set.Firefox: Before Firefox 88, collapse is not supported on ruby annotations.Firefox for Android: Firefox for Android doesn't hide borders when hiding <col> and <colgroup> elements if border-collapse: collapse is set.Firefox for Android: Before Firefox for Android 88, collapse is not supported on ruby annotations.Quest Browser: Before Quest Browser 5.0, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Quest Browser: Before Quest Browser 17.0, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Quest Browser: Since Quest Browser 17.0, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Opera: Before Opera 49, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Opera: Before Opera 78, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Opera: Since Opera 78, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Opera Android: Before Opera Android 46, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Opera Android: Before Opera Android 65, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Opera Android: Since Opera Android 65, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.Safari: Safari treats visibility: collapse like hidden, leaving a white gap.Safari: Safari supports the collapse value only on <tr>, <thead>, <tbody>, and <tfoot>, but not on <col> and <colgroup> elements.Safari on iOS: Safari on iOS treats visibility: collapse like hidden, leaving a white gap.Safari on iOS: Safari on iOS supports the collapse value only on <tr>, <thead>, <tbody>, and <tfoot>, but not on <col> and <colgroup> elements.Samsung Internet: Before Samsung Internet 8.0, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Samsung Internet: Before Samsung Internet 16.0, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.Samsung Internet: Since Samsung Internet 16.0, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.WebView Android: Before WebView Android 62, visibility: collapse has the same effect as hidden for <tr>, <thead>, <tbody>, and <tfoot> elements, flex items, and ruby annotations, leaving a blank gap. It has no effect on <col> and <colgroup> elements.WebView Android: Before WebView Android 92, visibility: collapse supports <tr>, <thead>, <tbody>, and <tfoot> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap. It has no effect on <col> and <colgroup> elements.WebView Android: Since WebView Android 92, visibility: collapse supports <tr>, <thead>, <tbody>, <tfoot>, <col> and <colgroup> elements. For flex items and ruby annotations, it has the same effect as hidden, leaving a blank gap.WebView on iOS: WebView on iOS treats visibility: collapse like hidden, leaving a white gap.WebView on iOS: WebView on iOS supports the collapse value only on <tr>, <thead>, <tbody>, and <tfoot>, but not on <col> and <colgroup> elements.
css.selectors.target πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.selectors.type.namespaces Firefox11/9/2004 Safari4/15/2005157
css.selectors.universal.namespaces Firefox11/9/2004 Safari4/15/2005157
css.types.shape πŸ“‹Firefox11/9/2004 Safari4/15/2005157
css.types.shape.rect Firefox11/9/2004 Safari4/15/2005157
Internet Explorer: For Internet Explorer versions 5.5 through 7, the rect() function uses spaces (instead of commas) to separate parameters. For Internet Explorer 8 and later versions, only the standard comma-separated syntax is supported.
javascript.builtins.String.toLocaleLowerCase πŸ“‹Firefox11/9/2004 Safari4/15/2005157
javascript.builtins.String.toLocaleUpperCase πŸ“‹Firefox11/9/2004 Safari4/15/2005157

2004/11

API First Browser Date Last Browser Date Days Notes
api.Attr πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.localName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.namespaceURI πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.ownerElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.prefix πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.specified πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Attr.value πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSImportRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSImportRule.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSImportRule.media πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSImportRule.styleSheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRule.cssText πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: The property normalizes rules and does not return the original verbatim rule text. For example, border-width: 1px; border-style:solid; border-color:white; returns border: 1px solid white;.
api.CSSRule.parentRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRule.parentStyleSheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRule.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRuleList πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRuleList.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSRuleList.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration.cssText πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration.getPropertyPriority πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration.getPropertyValue πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration.parentRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleDeclaration.removeProperty πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleRule.selectorText πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleRule.style πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleSheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleSheet.cssRules πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleSheet.deleteRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleSheet.insertRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CSSStyleSheet.ownerRule πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.appendData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.data πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.deleteData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.insertData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.replaceData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.CharacterData.substringData πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMException πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMException.code πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMException.message πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMException.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMImplementation πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMImplementation.createDocument πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMImplementation.createDocumentType πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.DOMImplementation.hasFeature πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Since Firefox 19, hasFeature() mostly returns true.
api.Document πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createAttributeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createCDATASection πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createComment πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createDocumentFragment πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Doesn't conform to the DOM spec for XUL and XHTML documents: localName and namespaceURI are not set to null on the created element.
api.Document.createElementNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Doesn't conform to the DOM spec for XUL and XHTML documents: localName and namespaceURI are not set to null on the created element.
api.Document.createEvent πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: From version 67, creating touch events using this method is no longer supported.
api.Document.createProcessingInstruction πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createRange πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.createTextNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.defaultView πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.doctype πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.documentElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.getElementById πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.getElementsByTagName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.getElementsByTagNameNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.implementation πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.importNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Document.referrer πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.DOMActivate_event πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.attributes πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.className πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Only supported for HTMLElement, not all Element objects, such as SVGElement.Chrome Android: Only supported for HTMLElement, not all Element objects, such as SVGElement.Samsung Internet: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.Element.getAttribute πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.getAttributeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Starting in Firefox 13, null is always returned instead of the empty string, as per the DOM4 specification. Previously, there were cases in which an empty string could be returned.Firefox for Android: Starting in Firefox for Android 14, null is always returned instead of the empty string, as per the DOM4 specification. Previously, there were cases in which an empty string could be returned.
api.Element.getAttributeNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.getAttributeNodeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.getElementsByTagName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Chrome Android: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Firefox: Before Firefox 19, this method was returning a NodeList; it was then changed to reflect the change in the spec.Firefox for Android: Before Firefox for Android 19, this method was returning a NodeList; it was then changed to reflect the change in the spec.Quest Browser: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Opera: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Safari: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Safari on iOS: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Samsung Internet: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.WebView Android: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.WebView on iOS: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.
api.Element.getElementsByTagName.all_elements_selector Safari6/23/2003 Firefox11/9/2004505
api.Element.getElementsByTagNameNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Chrome Android: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Firefox: The behavior of element.getElementsByTagNameNS changed between Firefox 3.5 and Firefox 3.6. In Firefox 3.5 and before, this function would automatically case-fold any queries so that a search for "foo" would match "Foo" or "foo". In Firefox 3.6 and later this function is now case-sensitive so that a query for "foo" will only match "foo" and not "Foo". For more background on this, please see the comment from Henri Sivonen about the change. You can also look at the relevant part of the standard, which states which parts of the API are case-sensitive and which parts aren't.Firefox: Before Firefox 19, this method was returning a NodeList; it was then changed to reflects the spec change.Firefox for Android: Before Firefox 19, this method was returning a NodeList; it was then changed to reflects the spec change.Quest Browser: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Opera: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Opera Android: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Safari: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Safari on iOS: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.Samsung Internet: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.WebView Android: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.WebView on iOS: Initially, this method was returning a NodeList; it was then changed to reflect the spec change.
api.Element.getElementsByTagNameNS.all_elements_selector Safari6/23/2003 Firefox11/9/2004505
api.Element.hasAttribute πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.hasAttributeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.hasAttributes πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 35, it was implemented on the Node interface.Firefox for Android: Before Firefox for Android 35, it was implemented on the Node interface.
api.Element.id πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Only supported for HTMLElement, not all Element objects, such as SVGElement.Chrome Android: Only supported for HTMLElement, not all Element objects, such as SVGElement.Samsung Internet: Only supported for HTMLElement, not all Element objects, such as SVGElement.
api.Element.innerHTML πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.localName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.namespaceURI πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.prefix πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.removeAttribute πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Edge: This function doesn't respect boolean attributes' default values. See bug 12087679.
api.Element.removeAttributeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.removeAttributeNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.scrollLeft πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.Chrome Android: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.Edge: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.Internet Explorer: For right-to-left elements, this property uses 100-0 (most left to most right) instead of negative values.Quest Browser: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.Samsung Internet: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.WebView Android: For right-to-left elements, this property uses 0-100 (most left to most right) instead of negative values. See bug 41319147.
api.Element.scrollTop πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.scrollWidth πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: In Internet Explorer 5 through 7, if padding is set, the value of scrollWidth is equal to the sum of the left and right padding. This behavior was fixed in Internet Explorer 8.
api.Element.setAttribute πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: In Internet Explorer 7 and earlier, setAttribute doesn't set styles and removes events when you try to set them.
api.Element.setAttributeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.setAttributeNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Element.setAttributeNodeNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Edge: Returns a ClientRectList with ClientRect objects (which do not contain x and y properties) instead of DOMRect objects.Internet Explorer: Returns a ClientRectList with ClientRect objects (which do not contain x and y properties) instead of DOMRect objects.
api.Element.tagName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Event πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Node.js: Only available as an internal instance.
api.Event.currentTarget πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: On Internet Explorer 6 through 8, the event model is different. Event listeners are attached with the non-standard EventTarget.attachEvent method. In this model, there is no equivalent to event.currentTarget and this is the global object. One solution to emulate the event.currentTarget feature is to wrap your handler in a function calling the handler using Function.prototype.call with the element as a first argument. This way, this will be the expected value.
api.Event.preventDefault πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Event.stopPropagation πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Node.js: This is not used in Node.js and is provided purely for completeness.
api.Event.target πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.EventTarget πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Node.js: Only available as an internal instance.Safari: window.EventTarget did not exist on versions of Safari before 10.1.Safari on iOS: window.EventTarget did not exist on versions of Safari iOS before 10.3.WebView on iOS: window.EventTarget did not exist on versions of Safari iOS before 10.3.
api.EventTarget.addEventListener πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Before Chrome 49, the type and listener parameters were optional.Chrome Android: Before Chrome Android 49, the type and listener parameters were optional.Internet Explorer: Older versions of IE supported an equivalent, proprietary EventTarget.attachEvent() method.Quest Browser: Before Quest Browser 5.0, the type and listener parameters were optional.Samsung Internet: Before Samsung Internet 5.0, the type and listener parameters were optional.WebView Android: Before Chrome 49, the type and listener parameters were optional.
api.EventTarget.removeEventListener πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: Older versions of IE supported an equivalent, proprietary EventTarget.detachEvent() method.
api.HTMLAnchorElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.charset πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.coords πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.hash πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: From Firefox 29 to Firefox 40, the returned value was incorrectly percent-decoded.Firefox for Android: From Firefox for Android 29 to Firefox for Android 40, the returned value was incorrectly percent-decoded.
api.HTMLAnchorElement.host πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: In Internet Explorer 9, the host of an <a> always include the port (e.g. developer.mozilla.org:443), even if there is no explicit port in the href attribute value.
api.HTMLAnchorElement.hostname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.hreflang πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.pathname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.Firefox for Android: Before Firefox for Android 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.
api.HTMLAnchorElement.port πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.protocol πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.rel πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.rev πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.search πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.Firefox for Android: Before Firefox for Android 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.
api.HTMLAnchorElement.shape πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.target πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.text πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAnchorElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.alt πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.coords πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.hash πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: From Firefox 29 to Firefox 40, the returned value was incorrectly percent-decoded.Firefox for Android: From Firefox for Android 29 to Firefox for Android 40, the returned value was incorrectly percent-decoded.
api.HTMLAreaElement.host πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: In Internet Explorer 9, the host of an <a> always include the port (e.g. developer.mozilla.org:443), even if there is no explicit port in the href attribute value.
api.HTMLAreaElement.hostname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.noHref πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.pathname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.Firefox for Android: Before Firefox for Android 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.
api.HTMLAreaElement.port πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.protocol πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.search πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.Firefox for Android: Before Firefox for Android 53, the pathname and search HTMLHyperlinkElementUtils properties returned the wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return '/x?a=true&b=false' and search would return '', rather than '/x' and '?a=true&b=false' respectively. This has now been fixed.
api.HTMLAreaElement.shape πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLAreaElement.target πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLCollection πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLCollection.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLCollection.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLCollection.namedItem πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLDirectoryElement Safari6/23/2003 Firefox11/9/2004505
api.HTMLDirectoryElement.compact πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLDocument πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLElement.error_event πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHRElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHRElement.align πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHRElement.noShade πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHRElement.size πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHRElement.width πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHeadElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHtmlElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLHtmlElement.version πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLImageElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLImageElement.Image πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.accept πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.align πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.alt πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.checked πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.defaultChecked πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.defaultValue πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.disabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.form πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.maxLength πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.readOnly πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.select πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.size πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.src πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.useMap πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLInputElement.value πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLIElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 10, Gecko incorrectly reflected negative value attributes to 0.Firefox for Android: Before Firefox for Android 10, Gecko incorrectly reflected negative value attributes to 0.
api.HTMLLIElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLIElement.value πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLegendElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLegendElement.align πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLegendElement.form πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.charset πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.disabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Chrome Android: In Chrome Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Edge: Since Edge 79, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Quest Browser: In Quest Browser and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Opera Android: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.Samsung Internet: In Chrome and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.WebView Android: In WebView Android and other Blink-based browsers, adding the disabled attribute using JavaScript does not remove the stylesheet from document.styleSheets.
api.HTMLLinkElement.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.hreflang πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.media πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.rel πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.rev πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.sheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.target πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLLinkElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLMetaElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLMetaElement.content πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLMetaElement.httpEquiv πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLMetaElement.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLMetaElement.scheme πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLOptionElement πŸ“‹Safari2/2/2004 Firefox11/9/2004281
api.HTMLOptionElement.Option πŸ“‹Safari2/2/2004 Firefox11/9/2004281
Internet Explorer: Before Internet Explorer 9, the outerHTML of elements lose their text when constructing with new Option().
api.HTMLSelectElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: You should watch for change events on <select> instead of watching <option> elements for events. See bug 1090602 and Multiprocess Firefox Web content compatibility for details.
api.HTMLStyleElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLStyleElement.disabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLStyleElement.media πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLStyleElement.sheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLStyleElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.cols πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.defaultValue πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.disabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.form πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.readOnly πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.rows πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.select πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.HTMLTextAreaElement.value πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.History πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.History.back πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.History.forward πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.History.go πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.History.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.hash πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.host πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.hostname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.pathname πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the pathname property returned wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return "/x?a=true&b=false" rather than "/x".Firefox for Android: Before Firefox for Android 53, the pathname property returned wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, pathname would return "/x?a=true&b=false" rather than "/x".Internet Explorer: Internet Explorer does not provide the leading slash character in the pathname (docs/Web/API/Location instead of /docs/Web/API/Location).
api.Location.port πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.protocol πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Location.reload πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Deno: This method exists but has no effect in Deno.Edge: Before Edge 79, if a page added to Trusted Sites contains a cross-origin iframe, then calling reload() from within the iframe reloads the trusted page (in other words, the top page reloads, not the iframe).Internet Explorer: If a page added to Trusted Sites contains a cross-origin iframe, then calling reload() from within the iframe reloads the trusted page (in other words, the top page reloads, not the iframe).
api.Location.replace πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Deno: This method exists but has no effect in Deno. A location can be assigned using the --location runtime flag.
api.Location.search πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 53, the search property returned wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, search would return "", rather than "?a=true&b=false".Firefox for Android: Before Firefox for Android 53, the search property returned wrong parts of the URL. For example, for a URL of https://z.com/x?a=true&b=false, search would return "", rather than "?a=true&b=false".
api.MediaList πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.appendMedium πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.deleteMedium πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.mediaText πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MediaList.toString πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeType πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeType.description πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeType.enabledPlugin πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeType.suffixes πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeType.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeTypeArray πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MimeTypeArray.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MouseEvent πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MouseEvent.button πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MouseEvent.clientX πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.MouseEvent.layerX Safari6/23/2003 Firefox11/9/2004505
api.MouseEvent.layerY Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.getNamedItem πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.getNamedItemNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.removeNamedItem πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.removeNamedItemNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.setNamedItem πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NamedNodeMap.setNamedItemNS πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.appCodeName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.appName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.appVersion πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.javaEnabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.language πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 4, this property's value was also part of the user agent string, as reported by navigator.userAgent. Starting in Firefox 5, this property's value is based on the value of the Accept-Language HTTP header.Internet Explorer: Closest available (non-standard) properties are userLanguage and browserLanguage.
api.Navigator.mimeTypes πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.platform πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 69, platform would report running on a 32-bit CPU if running the 32-bit version of Firefox on a 64-bit system.Firefox: You can override the value returned by platform by setting the preference general.platform.override to the string you wish to be returned instead.
api.Navigator.plugins πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.product πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.productSub πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Always returns 20030107.Chrome Android: Always returns 20030107.Edge: Always returns 20030107.Quest Browser: Always returns 20030107.Opera: Always returns 20030107.Opera Android: Always returns 20030107.Safari: Always returns 20030107.Safari on iOS: Always returns 20030107.Samsung Internet: Always returns 20030107.WebView Android: Always returns 20030107.WebView on iOS: Always returns 20030107.
api.Navigator.userAgent πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Navigator.vendor πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Chrome Android: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Quest Browser: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Opera: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Opera Android: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Safari: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Safari on iOS: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.Samsung Internet: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.WebView Android: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.WebView on iOS: WebKit and old versions of Blink incorrectly do not make Node inherit from EventTarget.
api.Node.appendChild πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.childNodes πŸ“‹Safari2/2/2004 Firefox11/9/2004281
api.Node.cloneNode πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.firstChild πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.hasChildNodes πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.insertBefore πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.lastChild πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.nextSibling πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.nodeName πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.nodeType πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.nodeValue πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.normalize πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.parentNode πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.previousSibling πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Node.removeChild πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.Node.replaceChild πŸ“‹Safari10/24/2003 Firefox11/9/2004382
api.NodeList πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NodeList.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.NodeList.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Plugin πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Plugin.description πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Plugin.filename πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Plugin.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Plugin.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.PluginArray πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.PluginArray.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.PluginArray.refresh πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Since Chrome 59, method parameters are required instead of optional.Chrome Android: Since Chrome Android 59, method parameters are required instead of optional.Edge: Since Edge 79, method parameters are required instead of optional.Quest Browser: Since Quest Browser 5.0, method parameters are required instead of optional.Opera: Since Opera 46, method parameters are required instead of optional.Opera Android: Since Opera Android 43, method parameters are required instead of optional.Samsung Internet: Since Samsung Internet 7.0, method parameters are required instead of optional.WebView Android: Since WebView Android 59, method parameters are required instead of optional.
api.ProcessingInstruction πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.ProcessingInstruction.sheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.ProcessingInstruction.target πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Starting with Firefox 13, the Range object throws a DOMException as defined in DOM 4, instead of a RangeException defined in prior specifications.Firefox for Android: Starting with Firefox for Android 14, the Range object throws a DOMException as defined in DOM 4, instead of a RangeException defined in prior specifications.
api.Range.cloneContents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.cloneRange πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.collapse πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.collapsed πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.commonAncestorContainer πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.compareBoundaryPoints πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.createContextualFragment πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.deleteContents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.detach πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Since Chrome 37, this method does nothing, as specified. See bug 40362748.Chrome Android: Since Chrome Android 37, this method does nothing, as specified. See bug 40362748.Firefox: Since Firefox 15, this method does nothing, as specified. See bug 702948.Firefox for Android: Since Firefox for Android 15, this method does nothing, as specified. See bug 702948.Quest Browser: Since Quest Browser 5.0, this method does nothing, as specified. See bug 40362748.Opera: Since Opera 24, this method does nothing, as specified. See bug 40362748.Opera Android: Since Opera 24, this method does nothing, as specified. See bug 40362748.Safari: Since Safari 10, this method does nothing, see bug 148454.Safari on iOS: Since Safari on iOS 10, this method does nothing, see bug 148454.Samsung Internet: Since Samsung Internet 3.0, this method does nothing, as specified. See bug 40362748.WebView Android: Since WebView Android 37, this method does nothing, as specified. See bug 40362748.WebView on iOS: Since WebView on iOS 10, this method does nothing, see bug 148454.
api.Range.endContainer πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.endOffset πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.extractContents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.insertNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.selectNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.selectNodeContents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setEnd πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setEndAfter πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setEndBefore πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setStart πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setStartAfter πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.setStartBefore πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.startContainer πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.startOffset πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.surroundContents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Range.toString πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Screen πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Screen.availHeight πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Edge: Always reflects the main screen.
api.Screen.availLeft Safari6/23/2003 Firefox11/9/2004505
api.Screen.availLeft.relative-multi-screen Safari6/23/2003 Firefox11/9/2004505
Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Screen.availTop Safari6/23/2003 Firefox11/9/2004505
api.Screen.availTop.relative-multi-screen Safari6/23/2003 Firefox11/9/2004505
Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Screen.availWidth πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Edge: Always reflects the main screen.
api.Screen.colorDepth πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting with version 59 this property is no longer required to always return 24.Chrome Android: Starting with version 59 this property is no longer required to always return 24.Quest Browser: Starting with version 5.0 this property is no longer required to always return 24.Samsung Internet: Starting with Samsung Internet 7.0 this property is no longer required to always return 24.WebView Android: Starting with version 59 this property is no longer required to always return 24.
api.Screen.height πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Screen.pixelDepth πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting with version 59 this property is no longer required to always return 24.Chrome Android: Starting with version 59 this property is no longer required to always return 24.Quest Browser: Starting with version 5.0 this property is no longer required to always return 24.Samsung Internet: Starting with Samsung Internet 7.0 this property is no longer required to always return 24.WebView Android: Starting with version 59 this property is no longer required to always return 24.
api.Screen.width πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.disabled πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.href πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.media πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.ownerNode πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.parentStyleSheet πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.title πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheet.type πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheetList πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheetList.item πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.StyleSheetList.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Text πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Text.splitText πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Before Chrome 30, the offset parameter was optional.Chrome Android: Before Chrome Android 30, the offset parameter was optional.Quest Browser: Before Quest Browser 5.0, the offset parameter was optional.Opera: Before Opera 17, the offset parameter was optional.Opera Android: Before Opera 17, the offset parameter was optional.Safari: The offset parameter is optional.Safari on iOS: The offset parameter is optional.Samsung Internet: Before Samsung Internet 2.0, the offset parameter was optional.WebView Android: Before version 4.4, the offset parameter was optional.WebView on iOS: The offset parameter is optional.
api.UIEvent πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.UIEvent.detail πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Internet Explorer: Always 0 on click and dblclick events. On mousedown and mouseup events, the count is not unique to the element, but is rather the global click count for the current document -- even across refreshes.
api.UIEvent.initUIEvent πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.UIEvent.view πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.UIEvent.which πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: When selecting an autocomplete suggestion, a keydown event fires where the event's which property is undefined. See bug 41425904.Chrome Android: When selecting an autocomplete suggestion, a keydown event fires where the event's which property is undefined. See bug 41425904.Edge: Only supported for KeyboardEvent and MouseEvent, not all UIEvent objects.Firefox: On mousemove events, the which property is incorrectly always set to 1.Firefox for Android: On mousemove events, the which property is incorrectly always set to 1.Internet Explorer: Only supported for KeyboardEvent and MouseEvent, not all UIEvent objects.Quest Browser: When selecting an autocomplete suggestion, a keydown event fires where the event's which property is undefined. See bug 41425904.Opera: Only supported for KeyboardEvent and MouseEvent, not all UIEvent objects.Opera Android: Only supported for KeyboardEvent and MouseEvent, not all UIEvent objects.Samsung Internet: When selecting an autocomplete suggestion, a keydown event fires where the event's which property is undefined. See bug 41425904.WebView Android: When selecting an autocomplete suggestion, a keydown event fires where the event's which property is undefined. See bug 41425904.
api.Window πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Node.js: The Window interface is not implemented, but some methods, and properties are available in the global scope.
api.Window.alert πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Chrome Android: Starting with Chrome Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Quest Browser: Starting with Quest Browser 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera Android: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Samsung Internet: Starting with Samsung Internet 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.WebView Android: Starting with WebView Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
api.Window.blur πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.captureEvents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.close πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Before Chrome 95, script-closeability depended on having an opener, not on being created by web content.Chrome Android: Before Chrome Android 95, script-closeability depended on having an opener, not on being created by web content.Deno: Exits the current Deno process.Firefox: Before Firefox 128, script-closeability depended on having an opener, not on being created by web content.Firefox for Android: Before Firefox for Android 128, script-closeability depended on having an opener, not on being created by web content.Quest Browser: Before Quest Browser 18.0, script-closeability depended on having an opener, not on being created by web content.Samsung Internet: Before Samsung Internet 17.0, script-closeability depended on having an opener, not on being created by web content.WebView Android: Before WebView Android 95, script-closeability depended on having an opener, not on being created by web content.
api.Window.closed πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.confirm πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Chrome Android: Starting with Chrome Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Quest Browser: Starting with Quest Browser 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera Android: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Samsung Internet: Starting with Samsung Internet 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.WebView Android: Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
api.Window.document πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.focus πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting in Chrome 66, opening a popup in fullscreen mode and calling this function will end fullscreen mode.
api.Window.frames πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.getSelection πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.history πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.length πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.location πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Deno: Reflects the value passed via the --location runtime flag.Firefox: Before Firefox 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.Firefox for Android: Before Firefox for Android 57, single quotes contained in URLs were escaped when accessed via URL APIs. See bug 1386683.
api.Window.moveBy πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.moveTo πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.moveTo.relative-multi-screen Safari6/23/2003 Firefox11/9/2004505
Chrome: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Chrome Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Edge: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Firefox: Multi-screen coordinates are used, but windows are clamped to their existing displays.Firefox for Android: Multi-screen coordinates are used, but windows are clamped to their existing displays.Quest Browser: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Opera: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Opera Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.Samsung Internet: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.WebView Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Window.name πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Before Firefox 86, if a new page from another domain is loaded into a tab, then window.name is not set to an empty string, which can allow some cross-site attacks. See bug 1685089 and bug 444222.Firefox for Android: Before Firefox for Android 86, if a new page from another domain is loaded into a tab, then window.name is not set to an empty string, which can allow some cross-site attacks. See bug 1685089 and bug 444222.
api.Window.navigator πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.open πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Safari on iOS: This method will not function if the target parameter is unspecified or set to _blank.WebView on iOS: This method will not function if the target parameter is unspecified or set to _blank.
api.Window.open.relative-multi-screen Safari6/23/2003 Firefox11/9/2004505
Chrome: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Chrome Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Edge: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Quest Browser: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Opera: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Opera Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.Safari: Coordinate origin used is inconsistent/unreliable.Safari on iOS: Coordinate origin used is inconsistent/unreliable.Samsung Internet: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.WebView Android: Without the window-management permission, multi-screen coordinates are used, but windows are clamped to their existing displays.WebView on iOS: Coordinate origin used is inconsistent/unreliable.
api.Window.opener πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.print πŸ“‹Safari10/24/2003 Firefox11/9/2004382
Chrome: Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Chrome Android: Starting with Chrome Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Quest Browser: Starting with Quest Browser 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera Android: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Samsung Internet: Starting with Samsung Internet 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.WebView Android: Starting with WebView Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
api.Window.prompt πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Chrome: Starting with Chrome 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Chrome Android: Starting with Chrome Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Firefox: Firefox strips newline characters from the prompt response; see bug 1716229.Firefox for Android: Firefox for Android strips newline characters from the prompt response; see bug 1716229.Internet Explorer: This function has no effect in the Modern UI/Metro version of Internet Explorer for Windows 8. It does not display a prompt to the user, and always returns undefined. It is not clear whether this is a bug or intended behavior. Desktop versions of IE do implement this function.Quest Browser: Starting with Quest Browser 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Opera Android: Starting with Opera 33, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.Samsung Internet: Starting with Samsung Internet 5.0, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.WebView Android: Starting with WebView Android 46, this method is blocked inside an <iframe> unless its sandbox attribute has the value allow-modals.
api.Window.releaseEvents πŸ“‹Safari6/23/2003 Firefox11/9/2004505
api.Window.resizeBy πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn't created by window.open or contains more than one tab. See here for more details.
api.Window.resizeTo πŸ“‹Safari6/23/2003 Firefox11/9/2004505
Firefox: Since Firefox 7, it's no longer possible for a web site to change the default size of a window in a browser if the window wasn't created by window.open or contains more than one tab. See here for more details.
api.Window.resize_event πŸ“‹Safari10/24/2003 Firefox11/9/2004382
Chrome: Chrome does not fire a resize event on page load.Chrome Android: Chrome Android does not fire a resize event on page load.Edge: Before Edge 79, Edge fired a resize event on page load. This is no longer the case.Firefox: Before Firefox 68, Firefox fired a resize event on page load. This is no longer the case.Firefox for Android: Before Firefox for Android 68, Firefox for Android fired a resiz