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 Chrome and Firefox, 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 Chrome2/4/2025 Firefox3/24/2026413
html.elements.template.shadowrootreferencetarget Chrome2/4/2025 Firefox3/24/2026413
api.Element.setHTML πŸ“‹Firefox2/24/2026 Chrome3/10/202614
Chrome: Chrome 105 to Chrome 118 (inclusive) supported this method with a significantly different specification.Chrome Android: Chrome Android 105 to Chrome Android 118 (inclusive) supported this method with a significantly different specification.Edge: Edge 105 to Edge 118 (inclusive) supported this method with a significantly different specification.WebView Android: WebView Android 105 to WebView Android 118 (inclusive) supported this method with a significantly different specification.
api.NavigationPrecommitController.addHandler πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer πŸ“‹Firefox2/24/2026 Chrome3/10/202614
Chrome: Chrome 105 to Chrome 118 (inclusive) supported this interface name with a significantly different specification.Chrome Android: Chrome Android 105 to Chrome Android 118 (inclusive) supported this interface name with a significantly different specification.Edge: Edge 105 to Edge 118 (inclusive) supported this interface name with a significantly different specification.WebView Android: WebView Android 105 to WebView Android 118 (inclusive) supported this interface name with a significantly different specification.
api.Sanitizer.Sanitizer πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.allowAttribute πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.allowElement πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.get πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.removeAttribute πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.removeElement πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.removeUnsafe πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.replaceElementWithChildren πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.setComments πŸ“‹Firefox2/24/2026 Chrome3/10/202614
api.Sanitizer.setDataAttributes πŸ“‹Firefox2/24/2026 Chrome3/10/202614
css.properties.text-indent.each-line πŸ“‹Firefox12/19/2023 Chrome3/10/2026812
css.properties.text-indent.hanging πŸ“‹Firefox12/19/2023 Chrome3/10/2026812
javascript.builtins.Iterator.concat πŸ“‹Firefox1/13/2026 Chrome3/10/202656

2026/2

API First Browser Date Last Browser Date Days Notes
api.Document.execCommand.paste Chrome4/14/2015 Firefox2/24/20263969
Firefox: Supported in content scripts (not just extensions) via the Clipboard APIFirefox for Android: Supported in content scripts (not just extensions) via the Clipboard API
api.Element.pointerrawupdate_event πŸ“‹Chrome9/10/2019 Firefox2/24/20262359
Chrome: Before version 142, pointerrawupdate events were exposed to non-secure contexts.Chrome Android: Before version 142, pointerrawupdate events were exposed to non-secure contexts.Edge: Before version 142, pointerrawupdate events were exposed to non-secure contexts.Firefox: The pointerrawupdate event handler receives a MouseEvent whose movement properties (movementX, movementY) are always 0. See bug 1987671.Firefox for Android: The pointerrawupdate event handler receives a MouseEvent whose movement properties (movementX, movementY) are always 0. See bug 1987671.Quest Browser: Before version false, pointerrawupdate events were exposed to non-secure contexts.Opera: Before version 126, pointerrawupdate events were exposed to non-secure contexts.Opera Android: Before version 93, pointerrawupdate events were exposed to non-secure contexts.Samsung Internet: Before version false, pointerrawupdate events were exposed to non-secure contexts.WebView Android: Before version 142, pointerrawupdate events were exposed to non-secure contexts.
api.Location.ancestorOrigins πŸ“‹Chrome6/26/2012 Firefox2/24/20264991
Deno: This value is always empty in Deno.
api.TrustedHTML πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedHTML.toJSON πŸ“‹Chrome4/13/2021 Firefox2/24/20261778
api.TrustedHTML.toString πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedScript πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedScript.toJSON πŸ“‹Chrome4/13/2021 Firefox2/24/20261778
api.TrustedScript.toString πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedScriptURL πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedScriptURL.toJSON πŸ“‹Chrome4/13/2021 Firefox2/24/20261778
api.TrustedScriptURL.toString πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicy πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicy.createHTML πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicy.createScript πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicy.createScriptURL πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicy.name πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.createPolicy πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.defaultPolicy πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.emptyHTML πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.emptyScript πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.getAttributeType πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.getPropertyType πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.isHTML πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.isScript πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.TrustedTypePolicyFactory.isScriptURL πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
api.trustedTypes πŸ“‹Chrome5/19/2020 Firefox2/24/20262107
css.properties.overflow.replaced_elements πŸ“‹Chrome11/29/2022 Firefox2/24/20261183
css.properties.overflow-clip-margin.border-box πŸ“‹Chrome8/2/2022 Firefox2/24/20261302
css.properties.overflow-clip-margin.content-box πŸ“‹Chrome8/2/2022 Firefox2/24/20261302
css.properties.overflow-clip-margin.padding-box πŸ“‹Chrome8/2/2022 Firefox2/24/20261302
css.properties.overflow-x.replaced_elements πŸ“‹Chrome11/29/2022 Firefox2/24/20261183
css.properties.overflow-y.replaced_elements πŸ“‹Chrome11/29/2022 Firefox2/24/20261183
css.properties.position-area.block-end πŸ“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome1/13/2026 Firefox2/24/202642
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“‹Chrome5/14/2024 Firefox2/24/2026651
css.properties.position-try-order.most-block-size πŸ“‹Chrome5/14/2024 Firefox2/24/2026651
css.properties.position-try-order.most-height πŸ“‹Chrome5/14/2024 Firefox2/24/2026651
css.properties.position-try-order.most-inline-size πŸ“‹Chrome5/14/2024 Firefox2/24/2026651
css.properties.position-try-order.most-width πŸ“‹Chrome5/14/2024 Firefox2/24/2026651
css.properties.position-try-order.normal πŸ“‹Chrome5/14/2024 Firefox2/24/2026651
css.types.basic-shape.shape πŸ“‹Chrome4/1/2025 Firefox2/24/2026329
html.elements.details.search_match_opens Chrome1/4/2022 Firefox2/24/20261512
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“‹Chrome5/24/2022 Firefox2/24/20261372
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.
api.HTMLElement.focus.options_focusVisible_parameter Firefox8/23/2022 Chrome2/10/20261267
api.LargestContentfulPaint.paintTime πŸ“‹Firefox6/24/2025 Chrome2/10/2026231
api.LargestContentfulPaint.presentationTime πŸ“‹Firefox6/24/2025 Chrome2/10/2026231
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.PerformancePaintTiming.paintTime πŸ“‹Firefox6/24/2025 Chrome2/10/2026231
api.PerformancePaintTiming.presentationTime πŸ“‹Firefox6/24/2025 Chrome2/10/2026231
css.properties.text-justify πŸ“‹Firefox8/8/2017 Chrome2/10/20263108
Edge: Standard values inter-character and none are supported. The deprecated distribute value is also supported.Internet Explorer: Standard values inter-character and none are supported. The deprecated distribute value is also supported.
css.properties.text-justify.auto πŸ“‹Firefox8/8/2017 Chrome2/10/20263108
css.properties.text-justify.inter-character πŸ“‹Firefox8/8/2017 Chrome2/10/20263108
css.properties.text-justify.inter-word πŸ“‹Firefox8/8/2017 Chrome2/10/20263108
css.properties.text-justify.none πŸ“‹Firefox8/8/2017 Chrome2/10/20263108
css.properties.word-spacing.percentages Firefox3/8/2016 Chrome2/10/20263626
javascript.builtins.Map.getOrInsert πŸ“‹Firefox10/14/2025 Chrome2/10/2026119
javascript.builtins.Map.getOrInsertComputed πŸ“‹Firefox10/14/2025 Chrome2/10/2026119
javascript.builtins.WeakMap.getOrInsert πŸ“‹Firefox10/14/2025 Chrome2/10/2026119
javascript.builtins.WeakMap.getOrInsertComputed πŸ“‹Firefox10/14/2025 Chrome2/10/2026119

2026/1

API First Browser Date Last Browser Date Days Notes
api.Blob.bytes πŸ“‹Firefox7/9/2024 Chrome1/13/2026553
api.CSSPositionTryDescriptors πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.align-self πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.alignSelf πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.block-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.blockSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.bottom πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.height πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inline-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inlineSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-block πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-block-end πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-block-start πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-inline πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-inline-end πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.inset-inline-start πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetBlock πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetBlockEnd πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetBlockStart πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetInline πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetInlineEnd πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.insetInlineStart πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.justify-self πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.justifySelf πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.left πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-block πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-block-end πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-block-start πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-bottom πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-inline πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-inline-end πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-inline-start πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-left πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-right πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.margin-top πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginBlock πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginBlockEnd πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginBlockStart πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginBottom πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginInline πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginInlineEnd πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginInlineStart πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginLeft πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginRight πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.marginTop πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.max-block-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.max-height πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.max-inline-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.max-width πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.maxBlockSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.maxHeight πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.maxInlineSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.maxWidth πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.min-block-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.min-height πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.min-inline-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.min-width πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.minBlockSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.minHeight πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.minInlineSize πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.minWidth πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.place-self πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.placeSelf πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.position-anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.position-area πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
api.CSSPositionTryDescriptors.positionAnchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.positionArea πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
api.CSSPositionTryDescriptors.right πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.top πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryDescriptors.width πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryRule πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryRule.name πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.CSSPositionTryRule.style πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.Document.activeViewTransition πŸ“‹Chrome10/28/2025 Firefox1/13/202677
api.Document.startViewTransition.options_parameter πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.Document.startViewTransition.options_parameter.types_parameter πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.Document.startViewTransition.options_parameter.update_parameter πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.HTMLButtonElement.commandForElement.implicit_anchor_reference πŸ“‹Chrome4/1/2025 Firefox1/13/2026287
api.HTMLButtonElement.popoverTargetElement.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
api.HTMLElement.showPopover.options_source_parameter.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
api.HTMLElement.togglePopover.options_source_parameter.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
api.HTMLInputElement.popoverTargetElement.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
api.NavigateEvent πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.NavigateEvent πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.canIntercept πŸ“‹Chrome9/2/2022 Firefox1/13/20261229
api.NavigateEvent.destination πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.downloadRequest πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.formData πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.hasUAVisualTransition πŸ“‹Chrome10/10/2023 Firefox1/13/2026826
api.NavigateEvent.hashChange πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.info πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.intercept πŸ“‹Chrome9/2/2022 Firefox1/13/20261229
api.NavigateEvent.intercept.precommitHandler_option πŸ“‹Chrome9/30/2025 Firefox1/13/2026105
api.NavigateEvent.navigationType πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.scroll πŸ“‹Chrome9/2/2022 Firefox1/13/20261229
api.NavigateEvent.signal πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigateEvent.sourceElement πŸ“‹Chrome4/1/2025 Firefox1/13/2026287
api.NavigateEvent.userInitiated πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.activation πŸ“‹Chrome3/19/2024 Firefox1/13/2026665
api.Navigation.back πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.canGoBack πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.canGoForward πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.currentEntry πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.currententrychange_event πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.entries πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.forward πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.navigate πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
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“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.navigateerror_event πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.navigatesuccess_event πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.reload πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.transition πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.traverseTo πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Navigation.updateCurrentEntry πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationActivation πŸ“‹Chrome3/19/2024 Firefox1/13/2026665
api.NavigationActivation.entry πŸ“‹Chrome3/19/2024 Firefox1/13/2026665
api.NavigationActivation.from πŸ“‹Chrome3/19/2024 Firefox1/13/2026665
api.NavigationActivation.navigationType πŸ“‹Chrome3/19/2024 Firefox1/13/2026665
api.NavigationCurrentEntryChangeEvent πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationCurrentEntryChangeEvent.NavigationCurrentEntryChangeEvent πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationCurrentEntryChangeEvent.from πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationCurrentEntryChangeEvent.navigationType πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.getState πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.id πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.index πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.key πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.sameDocument πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationDestination.url πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.dispose_event πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.getState πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.id πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.index πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.key πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.sameDocument πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationHistoryEntry.url πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationPrecommitController πŸ“‹Chrome9/30/2025 Firefox1/13/2026105
api.NavigationPrecommitController.redirect πŸ“‹Chrome9/30/2025 Firefox1/13/2026105
api.NavigationTransition πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationTransition.committed πŸ“‹Chrome9/30/2025 Firefox1/13/2026105
api.NavigationTransition.finished πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationTransition.from πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.NavigationTransition.navigationType πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
api.Performance.interactionCount πŸ“‹Firefox10/14/2025 Chrome1/13/202691
api.SVGAElement.hreflang πŸ“‹Firefox6/26/2018 Chrome1/13/20262758
api.SVGAElement.ping πŸ“‹Firefox6/26/2018 Chrome1/13/20262758
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.SVGAElement.referrerPolicy πŸ“‹Firefox6/26/2018 Chrome1/13/20262758
api.SVGAElement.type πŸ“‹Firefox6/26/2018 Chrome1/13/20262758
api.ServiceWorker.ecmascript_modules Chrome5/25/2021 Firefox1/13/20261694
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“‹Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.@@iterator Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.add Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.clear Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.delete Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.entries Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.forEach Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.has Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.keys Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.size Chrome5/14/2024 Firefox1/13/2026609
api.ViewTransitionTypeSet.values Chrome5/14/2024 Firefox1/13/2026609
api.Window.navigation πŸ“‹Chrome5/24/2022 Firefox1/13/20261330
css.at-rules.position-try πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.align-items.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.align-self.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.anchor-name πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.anchor-name.none πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.anchor-scope πŸ“‹Chrome11/12/2024 Firefox1/13/2026427
css.properties.anchor-scope.all πŸ“‹Chrome11/12/2024 Firefox1/13/2026427
css.properties.anchor-scope.none πŸ“‹Chrome11/12/2024 Firefox1/13/2026427
css.properties.background-position-x.side-relative_values Firefox9/20/2016 Chrome1/13/20263402
css.properties.background-position-y.side-relative_values Firefox9/20/2016 Chrome1/13/20263402
css.properties.block-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.bottom.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.bottom.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.height.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inline-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-block.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-block.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-block-end.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-block-end.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-block-start.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-block-start.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-inline.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-inline.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-inline-end.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-inline-end.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.inset-inline-start.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.inset-inline-start.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.justify-items.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.justify-self.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.left.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.left.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-block.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-block-end.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-block-start.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-bottom.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-inline.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-inline-end.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-inline-start.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-left.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-right.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.margin-top.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.max-block-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.max-height.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.max-inline-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.max-width.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.min-block-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.min-height.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.min-inline-size.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.min-width.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.place-items.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.place-self.anchor-center πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-anchor.auto πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
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-anchor.none Chrome1/13/2026 Firefox1/13/2026
css.properties.position-area πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.center πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.none πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-all πŸ“‹Chrome1/13/2026 Firefox1/13/2026
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“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-bottom πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-left πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-right πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-self-x-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-area.span-self-x-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-area.span-self-y-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-area.span-self-y-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-area.span-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-top πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-x-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-x-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-y-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.span-y-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-area.start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-try.block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.bottom πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.center πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.flip-block πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-try.flip-inline πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-try.flip-start πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-try.flip-x πŸ“‹Chrome1/13/2026 Firefox1/13/2026
css.properties.position-try.flip-y πŸ“‹Chrome1/13/2026 Firefox1/13/2026
css.properties.position-try.inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.left πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.none πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-try.right πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.self-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-all πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-bottom πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-left πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-right πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-self-x-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try.span-self-x-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try.span-self-y-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try.span-self-y-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try.span-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-top πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-x-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-x-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-y-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.span-y-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.top πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.x-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.x-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.y-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try.y-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
css.properties.position-try-fallbacks.block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.bottom πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.center πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.flip-block πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
css.properties.position-try-fallbacks.flip-inline πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
css.properties.position-try-fallbacks.flip-start πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
css.properties.position-try-fallbacks.flip-x πŸ“‹Chrome1/13/2026 Firefox1/13/2026
css.properties.position-try-fallbacks.flip-y πŸ“‹Chrome1/13/2026 Firefox1/13/2026
css.properties.position-try-fallbacks.inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.left πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.none πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
css.properties.position-try-fallbacks.position-area πŸ“‹Chrome8/20/2024 Firefox1/13/2026511
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“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.self-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-all πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-bottom πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-left πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-right πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-block-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-block-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-inline-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-inline-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-self-x-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try-fallbacks.span-self-x-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try-fallbacks.span-self-y-end πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try-fallbacks.span-self-y-start πŸ“‹Chrome12/2/2025 Firefox1/13/202642
css.properties.position-try-fallbacks.span-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-top πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-x-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-x-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-y-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.span-y-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.top πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.x-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.x-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.y-end πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-try-fallbacks.y-start πŸ“‹Chrome9/17/2024 Firefox1/13/2026483
css.properties.position-visibility πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-visibility.always πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-visibility.anchors-visible πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.position-visibility.no-overflow πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.right.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.right.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.top.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.properties.top.anchor-size πŸ“‹Chrome1/14/2025 Firefox1/13/2026364
css.properties.width.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.selectors.active-view-transition-type πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.types.anchor πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.types.anchor-size πŸ“‹Chrome5/14/2024 Firefox1/13/2026609
css.types.color.color.colorSpace_parameter_accepts_display-p3-linear_value πŸ“‹Firefox12/9/2025 Chrome1/13/202635
css.types.length.rcap πŸ“‹Chrome10/10/2023 Firefox1/13/2026826
css.types.length.rch πŸ“‹Chrome3/7/2023 Firefox1/13/20261043
css.types.length.rex πŸ“‹Chrome3/7/2023 Firefox1/13/20261043
css.types.length.ric πŸ“‹Chrome3/7/2023 Firefox1/13/20261043
html.elements.button.commandfor.implicit_anchor_reference πŸ“‹Chrome4/1/2025 Firefox1/13/2026287
html.elements.button.popovertarget.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
html.elements.input.popovertarget.implicit_anchor_reference πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
http.headers.Activate-Storage-Access πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
http.headers.Sec-Fetch-Storage-Access πŸ“‹Chrome2/4/2025 Firefox1/13/2026343
javascript.builtins.Date.toTemporalInstant πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.Duration πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.abs πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.blank πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.days πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.hours πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.microseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.milliseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.minutes πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.months πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.nanoseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.negated πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.round πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.seconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.sign πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.total πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.weeks πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Duration.years πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.epochMilliseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.epochNanoseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.fromEpochMilliseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.fromEpochNanoseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.round πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.toZonedDateTimeISO πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Instant.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.instant πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.plainDateISO πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.plainDateTimeISO πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.plainTimeISO πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.timeZoneId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.Now.zonedDateTimeISO πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.calendarId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.day πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.dayOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.dayOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.daysInMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.daysInWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.daysInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.era πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.eraYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.inLeapYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.month πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.monthCode πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.monthsInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toPlainDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toPlainMonthDay πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toPlainYearMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.toZonedDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.weekOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.withCalendar πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
Firefox: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.Firefox for Android: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.
javascript.builtins.Temporal.PlainDate.year πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDate.yearOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.calendarId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.day πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.dayOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.dayOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.daysInMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.daysInWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.daysInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.era πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.eraYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.hour πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.inLeapYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.microsecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.millisecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.minute πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.month πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.monthCode πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.monthsInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.nanosecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.round πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.second πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toPlainDate πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toPlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.toZonedDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.weekOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.withCalendar πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
Firefox: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.Firefox for Android: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.
javascript.builtins.Temporal.PlainDateTime.withPlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.year πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainDateTime.yearOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.calendarId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.day πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.monthCode πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.toPlainDate πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainMonthDay.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.PlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.hour πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.microsecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.millisecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.minute πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.nanosecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.round πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.second πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainTime.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.calendarId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.daysInMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.daysInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.era πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.eraYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.inLeapYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.month πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.monthCode πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.monthsInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.toPlainDate πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.PlainYearMonth.year πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.add πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.calendarId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.compare πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.day πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.dayOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.dayOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.daysInMonth πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.daysInWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.daysInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.epochMilliseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.epochNanoseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.equals πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.era πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.eraYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.from πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.getTimeZoneTransition πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.hour πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.hoursInDay πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.inLeapYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.microsecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.millisecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.minute πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.month πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.monthCode πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.monthsInYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.nanosecond πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.offset πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.offsetNanoseconds πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.round πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.second πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.since πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.startOfDay πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.subtract πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.timeZoneId πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toInstant πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toJSON πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toLocaleString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toPlainDate πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toPlainDateTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toPlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.toString πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.until πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.valueOf πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.weekOfYear πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.with πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.withCalendar πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
Firefox: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.Firefox for Android: Calendars islamic, islamic-rgsa and islamic-umalqura are not available. See bug 1950425 and bug 1954138.
javascript.builtins.Temporal.ZonedDateTime.withPlainTime πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.withTimeZone πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.year πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.builtins.Temporal.ZonedDateTime.yearOfWeek πŸ“‹Firefox5/27/2025 Chrome1/13/2026231
javascript.statements.import.import_attributes.type_css Chrome3/19/2024 Firefox1/13/2026665
javascript.statements.import.service_worker_support Chrome5/25/2021 Firefox1/13/20261694
webassembly.api.Memory.toFixedLengthBuffer πŸ“‹Firefox11/11/2025 Chrome1/13/202663
webassembly.api.Memory.toResizableBuffer πŸ“‹Firefox11/11/2025 Chrome1/13/202663

2025/12

API First Browser Date Last Browser Date Days Notes
api.CSSScopeRule πŸ“‹Chrome10/10/2023 Firefox12/9/2025791
api.CSSScopeRule.end πŸ“‹Chrome10/10/2023 Firefox12/9/2025791
api.CSSScopeRule.start πŸ“‹Chrome10/10/2023 Firefox12/9/2025791
api.SubtleCrypto.importKey.ECDH.compressed_elliptic_curve_points πŸ“‹Chrome2/4/2020 Firefox12/9/20252135
api.SubtleCrypto.importKey.ECDSA.compressed_elliptic_curve_points πŸ“‹Chrome2/4/2020 Firefox12/9/20252135
css.at-rules.scope πŸ“‹Chrome10/10/2023 Firefox12/9/2025791
css.properties.height.stretch πŸ“‹Chrome6/24/2025 Firefox12/9/2025168
css.properties.math-shift πŸ“‹Chrome1/10/2023 Firefox12/9/20251064
css.properties.math-shift.compact πŸ“‹Chrome1/10/2023 Firefox12/9/20251064
css.properties.math-shift.normal πŸ“‹Chrome1/10/2023 Firefox12/9/20251064
css.properties.width.stretch πŸ“‹Chrome6/24/2025 Firefox12/9/2025168
javascript.builtins.FinalizationRegistry.register.symbol_as_target Chrome1/10/2023 Firefox12/9/20251064
javascript.builtins.WeakMap.symbol_as_keys Chrome1/10/2023 Firefox12/9/20251064
javascript.builtins.WeakRef.WeakRef.symbol_as_target Chrome1/10/2023 Firefox12/9/20251064
javascript.builtins.WeakSet.symbol_as_keys Chrome1/10/2023 Firefox12/9/20251064
webassembly.relaxed-SIMD πŸ“‹Chrome5/30/2023 Firefox12/9/2025924
api.Window.gamepadconnected_event πŸ“‹Firefox6/1/2021 Chrome12/2/20251645
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 Chrome12/2/20251645
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.
css.properties.font-language-override πŸ“‹Firefox12/1/2014 Chrome12/2/20254019
css.properties.font-language-override.normal πŸ“‹Firefox3/22/2011 Chrome12/2/20255369
css.selectors.nesting.at-scope Firefox8/19/2025 Chrome12/2/2025105

2025/11

API First Browser Date Last Browser Date Days Notes
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_contributingSources_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_payloadType_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_rtpTimestamp_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_sequenceNumber_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.RTCEncodedAudioFrame.options_metadata_synchronizationSource_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.getMetadata.return_object_property_contributingSources πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.getMetadata.return_object_property_payloadType πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.getMetadata.return_object_property_rtpTimestamp πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.getMetadata.return_object_property_sequenceNumber πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedAudioFrame.getMetadata.return_object_property_synchronizationSource πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_contributingSources_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_dependencies_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_frameId_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_height_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_payloadType_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_spatialIndex_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_synchronizationSource_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_temporalIndex_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.RTCEncodedVideoFrame.options_metadata_width_parameter πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_contributingSources πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_dependencies πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_frameId πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_height πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_payloadType πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_spatialIndex πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_synchronizationSource πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_temporalIndex πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.RTCEncodedVideoFrame.getMetadata.return_object_property_width πŸ“‹Chrome7/23/2024 Firefox11/11/2025476
api.ToggleEvent.source πŸ“‹Chrome9/2/2025 Firefox11/11/202570
css.properties.font-family.math Chrome1/10/2023 Firefox11/11/20251036
css.properties.text-autospace πŸ“‹Chrome9/2/2025 Firefox11/11/202570
css.properties.text-autospace.no-autospace πŸ“‹Chrome9/2/2025 Firefox11/11/202570
css.properties.text-autospace.normal πŸ“‹Chrome9/2/2025 Firefox11/11/202570
http.headers.Integrity-Policy πŸ“‹Chrome6/24/2025 Firefox11/11/2025140
Firefox: Reporting endpoints are ignored (violations are logged to console).Firefox for Android: Reporting endpoints are ignored (violations are logged to console).
http.headers.Integrity-Policy.blocked-destinations_script πŸ“‹Chrome6/24/2025 Firefox11/11/2025140
http.headers.Integrity-Policy-Report-Only πŸ“‹Chrome6/24/2025 Firefox11/11/2025140
Firefox: Reporting endpoints are ignored (violations are logged to console).Firefox for Android: Reporting endpoints are ignored (violations are logged to console).
http.headers.Integrity-Policy-Report-Only.blocked-destinations_script πŸ“‹Chrome6/24/2025 Firefox11/11/2025140
javascript.builtins.Atomics.waitAsync πŸ“‹Chrome4/13/2021 Firefox11/11/20251673
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.SVGAElement.download πŸ“‹Firefox4/2/2013 Chrome10/28/20254592
api.SVGScriptElement.async Firefox8/29/2023 Chrome10/28/2025791
api.CommandEvent πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.CommandEvent.CommandEvent Chrome4/1/2025 Firefox10/14/2025196
api.CommandEvent.command πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.CommandEvent.source πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.CustomElementRegistry.define.connectedMoveCallback_lifecycle_callback πŸ“‹Chrome2/4/2025 Firefox10/14/2025252
api.Document.moveBefore πŸ“‹Chrome2/4/2025 Firefox10/14/2025252
api.Document.startViewTransition πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
api.DocumentFragment.moveBefore πŸ“‹Chrome2/4/2025 Firefox10/14/2025252
api.Element.moveBefore πŸ“‹Chrome2/4/2025 Firefox10/14/2025252
api.GPUDevice.importExternalTexture πŸ“‹Chrome5/2/2023 Firefox10/14/2025896
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 Chrome8/15/2023 Firefox10/14/2025791
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.HTMLButtonElement.command πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.HTMLButtonElement.command.request-close πŸ“‹Chrome8/5/2025 Firefox10/14/202570
api.HTMLButtonElement.commandForElement πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.HTMLElement.command_event πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
api.HTMLElement.showPopover.options_source_parameter πŸ“‹Chrome5/27/2025 Firefox10/14/2025140
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“‹Chrome5/27/2025 Firefox10/14/2025140
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.MediaDevices.getSupportedConstraints.return_object_property_resizeMode πŸ“‹Chrome1/29/2019 Firefox10/14/20252450
api.MediaDevices.getUserMedia.constraints_resizeMode_parameter πŸ“‹Chrome1/29/2019 Firefox10/14/20252450
api.PerformanceEventTiming.interactionId πŸ“‹Chrome11/15/2021 Firefox10/14/20251429
api.RTCDataChannel.closing_event πŸ“‹Chrome4/7/2020 Firefox10/14/20252016
api.RTCDataChannel.transferable πŸ“‹Chrome10/15/2024 Firefox10/14/2025364
api.ScreenOrientation.lock πŸ“‹Chrome10/7/2014 Firefox10/14/20254025
Chrome: Always throws NotSupportedError.Edge: Always throws NotSupportedError.Firefox: Always throws NotSupportedError.Firefox for Android: The API exists but returns NS_ERROR_UNEXPECTED.Opera: Always throws NotSupportedError.
api.ScreenOrientation.unlock πŸ“‹Chrome10/7/2014 Firefox10/14/20254025
Chrome: Always throws NotSupportedError.Edge: Always throws NotSupportedError.Firefox: Always throws NotSupportedError.Firefox for Android: The API exists but returns NS_ERROR_UNEXPECTED.Opera: Always throws NotSupportedError.
api.ViewTransition πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
api.ViewTransition.finished πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
api.ViewTransition.ready πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
api.ViewTransition.skipTransition πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
api.ViewTransition.updateCallbackDone πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
css.properties.view-transition-class πŸ“‹Chrome5/14/2024 Firefox10/14/2025518
css.properties.view-transition-class.none πŸ“‹Chrome5/14/2024 Firefox10/14/2025518
css.properties.view-transition-name πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
css.properties.view-transition-name.match-element πŸ“‹Chrome5/27/2025 Firefox10/14/2025140
css.properties.view-transition-name.none πŸ“‹Chrome3/7/2023 Firefox10/14/2025952
css.selectors.active-view-transition πŸ“‹Chrome5/14/2024 Firefox10/14/2025518
css.selectors.view-transition πŸ“‹Chrome1/10/2023 Firefox10/14/20251008
css.selectors.view-transition-group πŸ“‹Chrome1/10/2023 Firefox10/14/20251008
css.selectors.view-transition-image-pair πŸ“‹Chrome1/10/2023 Firefox10/14/20251008
css.selectors.view-transition-new πŸ“‹Chrome1/10/2023 Firefox10/14/20251008
css.selectors.view-transition-old πŸ“‹Chrome1/10/2023 Firefox10/14/20251008
html.elements.button.command πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
html.elements.button.command.request-close πŸ“‹Chrome8/5/2025 Firefox10/14/202570
html.elements.button.commandfor πŸ“‹Chrome4/1/2025 Firefox10/14/2025196
html.elements.iframe.cross-origin-top-navigation-by-user-activation Chrome7/24/2018 Firefox10/14/20252639
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.DedicatedWorkerGlobalScope.rtctransform_event πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.Document.requestStorageAccess.strict_same_origin_policy πŸ“‹Firefox6/24/2025 Chrome9/30/202598
api.RTCRtpReceiver.transform πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransform πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransform.RTCRtpScriptTransform πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransformer πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransformer.options πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransformer.readable πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransformer.sendKeyFrameRequest πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpScriptTransformer.writable πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCRtpSender.transform πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCTransformEvent πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.RTCTransformEvent.transformer πŸ“‹Firefox8/29/2023 Chrome9/30/2025763
api.SpeechRecognition.abort πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.audioend_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.audiostart_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.continuous πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
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“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.error_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.grammars πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.interimResults πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.lang πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.maxAlternatives πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.nomatch_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.result_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.soundend_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.soundstart_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.speechend_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.speechstart_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.start πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.start_event πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
api.SpeechRecognition.stop πŸ“‹Chrome2/20/2014 Firefox9/16/20254226
css.selectors.after.nested_marker πŸ“‹Chrome4/1/2025 Firefox9/16/2025168
css.selectors.before.nested_marker πŸ“‹Chrome4/1/2025 Firefox9/16/2025168
css.selectors.details-content πŸ“‹Chrome11/12/2024 Firefox9/16/2025308
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.
http.headers.Set-Cookie.http_host-http_prefixes Chrome9/2/2025 Firefox9/16/202514
Firefox: __Host-Http- is supported under its original name __HostHttp-. See bug 1982555.Firefox for Android: __Host-Http- is supported under its original name __HostHttp-. See bug 1982555.
api.FontFace.featureSettings πŸ“‹Firefox9/22/2015 Chrome9/2/20253633
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.variationSettings πŸ“‹Firefox9/5/2018 Chrome9/2/20252554
api.ReadableStreamBYOBReader.read.options_min_parameter πŸ“‹Firefox1/7/2025 Chrome9/2/2025238
css.at-rules.font-face.font-feature-settings πŸ“‹Firefox12/1/2014 Chrome9/2/20253928
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.font-face.font-variation-settings πŸ“‹Firefox9/5/2018 Chrome9/2/20252554
javascript.builtins.Uint8Array.fromBase64 πŸ“‹Firefox11/26/2024 Chrome9/2/2025280
javascript.builtins.Uint8Array.fromHex πŸ“‹Firefox11/26/2024 Chrome9/2/2025280
javascript.builtins.Uint8Array.setFromBase64 πŸ“‹Firefox11/26/2024 Chrome9/2/2025280
javascript.builtins.Uint8Array.setFromHex πŸ“‹Firefox11/26/2024 Chrome9/2/2025280
javascript.builtins.Uint8Array.toBase64 πŸ“‹Firefox11/26/2024 Chrome9/2/2025280
javascript.builtins.Uint8Array.toHex πŸ“‹Firefox11/26/2024 Chrome9/2/2025280

2025/8

API First Browser Date Last Browser Date Days Notes
api.Animation.overallProgress πŸ“‹Chrome2/4/2025 Firefox8/19/2025196
api.RTCRtpSender.setParameters.parameters_encodings_parameter.codec Chrome10/31/2023 Firefox8/19/2025658
api.RTCStatsReport.type_candidate-pair.currentRoundTripTime πŸ“‹Chrome12/4/2018 Firefox8/19/20252450
api.RTCStatsReport.type_candidate-pair.responsesReceived πŸ“‹Chrome4/19/2017 Firefox8/19/20253044
api.RTCStatsReport.type_candidate-pair.totalRoundTripTime πŸ“‹Chrome12/4/2018 Firefox8/19/20252450
api.RTCStatsReport.type_inbound-rtp.jitterBufferMinimumDelay πŸ“‹Chrome9/2/2022 Firefox8/19/20251082
api.RTCStatsReport.type_inbound-rtp.jitterBufferTargetDelay πŸ“‹Chrome9/2/2022 Firefox8/19/20251082
api.RTCStatsReport.type_inbound-rtp.keyFramesDecoded πŸ“‹Chrome12/10/2019 Firefox8/19/20252079
api.Scheduler πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.Scheduler.postTask πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.Scheduler.yield πŸ“‹Chrome9/17/2024 Firefox8/19/2025336
api.Selection.collapse.accepts_nodes_in_shadow_trees Chrome5/27/2025 Firefox8/19/202584
api.Selection.extend.accepts_nodes_in_shadow_trees Chrome5/27/2025 Firefox8/19/202584
api.Selection.getComposedRanges πŸ“‹Chrome5/27/2025 Firefox8/19/202584
api.Selection.setBaseAndExtent.accepts_nodes_in_shadow_trees Chrome5/27/2025 Firefox8/19/202584
api.SpeechGrammar πŸ“‹Chrome2/21/2013 Firefox8/19/20254562
api.SpeechGrammar.SpeechGrammar Chrome2/21/2013 Firefox8/19/20254562
api.SpeechGrammar.src πŸ“‹Chrome2/21/2013 Firefox8/19/20254562
api.SpeechGrammar.weight πŸ“‹Chrome2/21/2013 Firefox8/19/20254562
api.SpeechGrammarList πŸ“‹Chrome8/5/2025 Firefox8/19/202514
api.SpeechGrammarList.SpeechGrammarList πŸ“‹Chrome8/5/2025 Firefox8/19/202514
api.SpeechGrammarList.addFromString πŸ“‹Chrome2/20/2014 Firefox8/19/20254198
api.SpeechGrammarList.addFromURI πŸ“‹Chrome2/20/2014 Firefox8/19/20254198
api.SpeechGrammarList.item πŸ“‹Chrome2/20/2014 Firefox8/19/20254198
api.SpeechGrammarList.length πŸ“‹Chrome2/20/2014 Firefox8/19/20254198
api.SpeechRecognition πŸ“‹Chrome8/5/2025 Firefox8/19/202514
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“‹Chrome8/5/2025 Firefox8/19/202514
api.TaskController πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskController.TaskController πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskController.setPriority πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskPriorityChangeEvent πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskPriorityChangeEvent.TaskPriorityChangeEvent πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskPriorityChangeEvent.previousPriority πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskSignal πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskSignal.any_static πŸ“‹Chrome8/15/2023 Firefox8/19/2025735
api.TaskSignal.priority πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.TaskSignal.prioritychange_event πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.URLPattern πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.URLPattern πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.URLPattern.ignoreCase_option πŸ“‹Chrome10/25/2022 Firefox8/19/20251029
api.URLPattern.exec πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.hasRegExpGroups πŸ“‹Chrome2/20/2024 Firefox8/19/2025546
api.URLPattern.hash πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.hostname πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.password πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.pathname πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.port πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.protocol πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.search πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.test πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.URLPattern.username πŸ“‹Chrome10/19/2021 Firefox8/19/20251400
api.scheduler πŸ“‹Chrome9/21/2021 Firefox8/19/20251428
api.GPUSupportedFeatures.feature_core-features-and-limits πŸ“‹Firefox7/22/2025 Chrome8/5/202514
Chrome: Supported on ChromeOS, macOS, and Windows.Chrome: Supported on Linux (Intel Gen12+ GPUs only) since Chrome 144.Chrome: Available on all adapters and enabled automatically on all devices even if not requested.Chrome Android: Available on all adapters and enabled automatically on all devices even if not requested.Edge: Supported on ChromeOS, macOS, and Windows.Edge: Supported on Linux (Intel Gen12+ GPUs only) since Edge 144.Edge: Available on all adapters and enabled automatically on all devices even if not requested.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: Available on all adapters and enabled automatically on all devices even if not requested.Opera Android: Available on all adapters and enabled automatically on all devices even if not requested.WebView Android: Available on all adapters and enabled automatically on all devices even if not requested.
api.GPUSupportedFeatures.feature_texture-compression-astc-sliced-3d πŸ“‹Firefox7/22/2025 Chrome8/5/202514
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 Chrome8/5/202514
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.

2025/7

API First Browser Date Last Browser Date Days Notes
api.GPU πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome7/23/2024 Firefox7/22/2025364
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome4/29/2025 Firefox7/22/202584
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.subgroupMaxSize πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
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.GPUAdapterInfo.subgroupMinSize πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
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.GPUAdapterInfo.vendor πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome11/12/2024 Firefox7/22/2025252
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.adapterInfo πŸ“‹Chrome1/14/2025 Firefox7/22/2025189
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.GPUDevice.createBindGroup πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.uncapturederror_event πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.GPUError πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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.GPUError.message πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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 Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.forEach πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome12/5/2023 Firefox7/22/2025595
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.HTMLDialogElement.closedBy πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
api.HTMLElement.togglePopover.force_parameter πŸ“‹Chrome8/15/2023 Firefox7/22/2025707
api.HTMLElement.togglePopover.options_force_parameter πŸ“‹Chrome10/15/2024 Firefox7/22/2025280
api.IntersectionObserver.scrollMargin Chrome12/5/2023 Firefox7/22/2025595
api.LargestContentfulPaint.renderTime.cross-origin Chrome2/4/2025 Firefox7/22/2025168
api.Navigator.gpu πŸ“‹Chrome5/2/2023 Firefox7/22/2025812
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.PointerEvent.persistentDeviceId πŸ“‹Chrome8/20/2024 Firefox7/22/2025336
api.WGSLLanguageFeatures πŸ“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome7/18/2023 Firefox7/22/2025735
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“‹Chrome5/2/2023 Firefox7/22/2025812
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.font-variant-emoji πŸ“‹Chrome11/12/2024 Firefox7/22/2025252
css.properties.font-variant-emoji.emoji πŸ“‹Chrome11/12/2024 Firefox7/22/2025252
css.properties.font-variant-emoji.normal πŸ“‹Chrome11/12/2024 Firefox7/22/2025252
css.properties.font-variant-emoji.text πŸ“‹Chrome11/12/2024 Firefox7/22/2025252
css.properties.font-variant-emoji.unicode πŸ“‹Chrome11/12/2024 Firefox7/22/2025252
html.elements.dialog.closedby πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
http.headers.Set-Cookie.Partitioned πŸ“‹Chrome5/30/2023 Firefox7/22/2025784
javascript.builtins.AsyncDisposableStack πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.@@asyncDispose πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.AsyncDisposableStack πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.adopt πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.defer πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.disposeAsync πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.disposed πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.move πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncDisposableStack.use πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.AsyncIterator.@@asyncDispose πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.@@dispose πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.DisposableStack πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.adopt πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.defer πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.dispose πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.disposed πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.move πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.DisposableStack.use πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.Iterator.@@dispose πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.SuppressedError πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.SuppressedError.SuppressedError πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.SuppressedError.error πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.SuppressedError.suppressed πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.builtins.Symbol.asyncDispose πŸ“‹Chrome7/23/2024 Firefox7/22/2025364
Node.js: Only available for fs and stream resources.Node.js: Only available for fs and stream resources.
javascript.builtins.Symbol.dispose πŸ“‹Chrome5/14/2024 Firefox7/22/2025434
Node.js: Only available for fs and stream resources.Node.js: Only available for fs and stream resources.
javascript.statements.await_using πŸ“‹Chrome3/4/2025 Firefox7/22/2025140
javascript.statements.using πŸ“‹Chrome3/4/2025 Firefox7/22/2025140

2025/6

API First Browser Date Last Browser Date Days Notes
api.CSS.highlights_static πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.CookieChangeEvent πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieChangeEvent.CookieChangeEvent πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieChangeEvent.changed πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieChangeEvent.deleted πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.change_event πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.delete πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.delete.partitioned_option πŸ“‹Chrome5/30/2023 Firefox6/24/2025756
api.CookieStore.get πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.get.name_return_property πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.get.value_return_property πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.getAll πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.set πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStore.set.partitioned_option πŸ“‹Chrome5/30/2023 Firefox6/24/2025756
api.CookieStoreManager πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStoreManager.getSubscriptions πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStoreManager.subscribe πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.CookieStoreManager.unsubscribe πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.Element.getHTML.escapes_lt_gt_in_attributes Chrome6/24/2025 Firefox6/24/2025
api.Element.innerHTML.escapes_lt_gt_in_attributes Chrome6/24/2025 Firefox6/24/2025
api.Element.outerHTML.escapes_lt_gt_in_attributes Chrome6/24/2025 Firefox6/24/2025
api.ExtendableCookieChangeEvent πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ExtendableCookieChangeEvent.ExtendableCookieChangeEvent πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ExtendableCookieChangeEvent.changed πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ExtendableCookieChangeEvent.deleted πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.Highlight πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.@@iterator Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.Highlight πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.add Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.clear Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.delete Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.entries Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.forEach Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.has Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.keys Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.priority πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.size Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.type πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.Highlight.values Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.@@iterator Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.clear Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.delete Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.entries Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.forEach Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.get Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.has Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.keys Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.set Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.size Chrome9/2/2022 Firefox6/24/20251026
api.HighlightRegistry.values Chrome9/2/2022 Firefox6/24/20251026
api.PushSubscriptionChangeEvent πŸ“‹Firefox4/1/2025 Chrome6/24/202584
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“‹Firefox4/1/2025 Chrome6/24/202584
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“‹Firefox4/1/2025 Chrome6/24/202584
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“‹Firefox4/1/2025 Chrome6/24/202584
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.cookieStore πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ServiceWorkerGlobalScope.cookiechange_event πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ServiceWorkerGlobalScope.pushsubscriptionchange_event πŸ“‹Firefox1/26/2016 Chrome6/24/20253437
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.cookies πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
api.ShadowRoot.getHTML.escapes_lt_gt_in_attributes Chrome6/24/2025 Firefox6/24/2025
api.ShadowRoot.innerHTML.escapes_lt_gt_in_attributes Chrome6/24/2025 Firefox6/24/2025
api.Window.cookieStore πŸ“‹Chrome11/17/2020 Firefox6/24/20251680
css.selectors.highlight πŸ“‹Chrome9/2/2022 Firefox6/24/20251026
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.
css.types.abs πŸ“‹Firefox9/26/2023 Chrome6/24/2025637
css.types.sign πŸ“‹Firefox9/26/2023 Chrome6/24/2025637

2025/5

API First Browser Date Last Browser Date Days Notes
api.CredentialsContainer.create.publicKey_option.extensions.credProtect Chrome7/30/2019 Firefox5/27/20252128
api.CredentialsContainer.create.publicKey_option.extensions.largeBlob πŸ“‹Chrome5/2/2023 Firefox5/27/2025756
api.CredentialsContainer.create.publicKey_option.extensions.prf πŸ“‹Chrome8/15/2023 Firefox5/27/2025651
Firefox: Not supported on macOS.
api.CredentialsContainer.get.publicKey_option.extensions.largeBlob πŸ“‹Chrome5/2/2023 Firefox5/27/2025756
api.CredentialsContainer.get.publicKey_option.extensions.prf πŸ“‹Chrome8/15/2023 Firefox5/27/2025651
Firefox: Not supported on macOS.
api.Element.beforematch_event πŸ“‹Chrome5/24/2022 Firefox5/27/20251099
api.HTMLDialogElement.requestClose πŸ“‹Chrome3/4/2025 Firefox5/27/202584
api.KeyboardEvent.repeat πŸ“‹Firefox3/18/2014 Chrome5/27/20254088
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.Selection.direction πŸ“‹Firefox5/14/2024 Chrome5/27/2025378
api.SubtleCrypto.exportKey.ed25519 πŸ“‹Firefox8/6/2024 Chrome5/27/2025294
api.SubtleCrypto.generateKey.ed25519 πŸ“‹Firefox8/6/2024 Chrome5/27/2025294
api.SubtleCrypto.importKey.ed25519 πŸ“‹Firefox8/6/2024 Chrome5/27/2025294
api.SubtleCrypto.sign.ed25519 πŸ“‹Firefox8/6/2024 Chrome5/27/2025294
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“‹Firefox8/6/2024 Chrome5/27/2025294
webassembly.exceptionsFinal πŸ“‹Firefox10/1/2024 Chrome5/27/2025238

2025/4

API First Browser Date Last Browser Date Days Notes
api.Navigator.login πŸ“‹Chrome12/5/2023 Firefox4/29/2025511
api.NavigatorLogin πŸ“‹Chrome12/5/2023 Firefox4/29/2025511
api.NavigatorLogin.setStatus πŸ“‹Chrome12/5/2023 Firefox4/29/2025511
api.ProgressEvent.ProgressEvent.loaded_total_options_accept_double Chrome4/29/2025 Firefox4/29/2025
api.RTCCertificate.getFingerprints πŸ“‹Chrome9/5/2017 Firefox4/29/20252793
api.RTCRtpSender.getParameters.return_object_property_degradationPreference πŸ“‹Chrome5/19/2020 Firefox4/29/20251806
api.RTCRtpSender.setParameters.parameters_degradationPreference_parameter πŸ“‹Chrome5/19/2020 Firefox4/29/20251806
api.SVGAElement.rel πŸ“‹Firefox6/26/2018 Chrome4/29/20252499
api.SVGAElement.relList πŸ“‹Firefox6/26/2018 Chrome4/29/20252499
api.SVGGeometryElement.isPointInFill.point_parameter_DOMPoint Firefox9/3/2019 Chrome4/29/20252065
api.SVGGeometryElement.isPointInStroke.point_parameter_DOMPoint Firefox9/3/2019 Chrome4/29/20252065
api.Window.originAgentCluster πŸ“‹Chrome4/13/2021 Firefox4/29/20251477
css.properties.print-color-adjust πŸ“‹Firefox2/8/2022 Chrome4/29/20251176
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.print-color-adjust.economy πŸ“‹Firefox2/8/2022 Chrome4/29/20251176
css.properties.print-color-adjust.exact πŸ“‹Firefox2/8/2022 Chrome4/29/20251176
html.elements.script.type.importmap.integrity πŸ“‹Chrome7/23/2024 Firefox4/29/2025280
http.headers.Clear-Site-Data.cache πŸ“‹Chrome3/6/2018 Firefox4/29/20252611
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.
http.headers.Origin-Agent-Cluster πŸ“‹Chrome4/13/2021 Firefox4/29/20251477
http.headers.Set-Login πŸ“‹Chrome12/5/2023 Firefox4/29/2025511
javascript.builtins.Error.captureStackTrace πŸ“‹Chrome9/15/2009 Firefox4/29/20255705
javascript.builtins.Error.isError πŸ“‹Chrome3/4/2025 Firefox4/29/202556
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.builtins.RegExp.escape πŸ“‹Firefox1/7/2025 Chrome4/29/2025112
javascript.grammar.trailing_commas.trailing_commas_in_dynamic_import πŸ“‹Chrome5/25/2021 Firefox4/29/20251435
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“‹Chrome5/25/2021 Firefox4/29/20251435
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“‹Chrome3/19/2024 Firefox4/29/2025406
javascript.statements.import.import_attributes.type_json Chrome3/19/2024 Firefox4/29/2025406
api.Element.ariaActiveDescendantElement πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaControlsElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaDescribedByElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaDetailsElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaErrorMessageElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaFlowToElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.Element.ariaLabelledByElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaActiveDescendantElement πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaControlsElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaDescribedByElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaDetailsElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaErrorMessageElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaFlowToElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
api.ElementInternals.ariaLabelledByElements πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.properties.hyphenate-limit-chars πŸ“‹Chrome1/10/2023 Firefox4/1/2025812
css.properties.hyphenate-limit-chars.auto πŸ“‹Chrome1/10/2023 Firefox4/1/2025812
css.properties.overflow-block πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-block.auto πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-block.clip πŸ“‹Firefox9/22/2020 Chrome4/1/20251652
css.properties.overflow-block.hidden πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-block.overlay Firefox4/11/2023 Chrome4/1/2025721
css.properties.overflow-block.scroll πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-block.visible πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-inline πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-inline.auto πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-inline.clip πŸ“‹Firefox9/22/2020 Chrome4/1/20251652
css.properties.overflow-inline.hidden πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-inline.overlay πŸ“‹Firefox4/11/2023 Chrome4/1/2025721
css.properties.overflow-inline.scroll πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.overflow-inline.visible πŸ“‹Firefox9/3/2019 Chrome4/1/20252037
css.properties.text-decoration.grammar-error πŸ“‹Chrome1/23/2024 Firefox4/1/2025434
css.properties.text-decoration.spelling-error πŸ“‹Chrome1/23/2024 Firefox4/1/2025434
css.properties.text-decoration-line.grammar-error πŸ“‹Chrome1/23/2024 Firefox4/1/2025434
css.properties.text-decoration-line.spelling-error πŸ“‹Chrome1/23/2024 Firefox4/1/2025434
css.types.gradient.conic-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.types.gradient.linear-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.types.gradient.radial-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.types.gradient.repeating-conic-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.types.gradient.repeating-linear-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
css.types.gradient.repeating-radial-gradient.single_color_stop πŸ“‹Firefox3/4/2025 Chrome4/1/202528
javascript.builtins.Atomics.pause πŸ“‹Chrome2/4/2025 Firefox4/1/202556
javascript.builtins.DataView.getFloat16 πŸ“‹Firefox8/6/2024 Chrome4/1/2025238
javascript.builtins.DataView.setFloat16 πŸ“‹Firefox8/6/2024 Chrome4/1/2025238
javascript.builtins.Float16Array πŸ“‹Firefox8/6/2024 Chrome4/1/2025238
javascript.builtins.Float16Array.Float16Array πŸ“‹Firefox8/6/2024 Chrome4/1/2025238
javascript.builtins.Math.f16round πŸ“‹Firefox8/6/2024 Chrome4/1/2025238

2025/3

API First Browser Date Last Browser Date Days Notes
api.CSSFontFeatureValuesRule πŸ“‹Firefox12/1/2014 Chrome3/4/20253746
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.HTMLElement.contentEditable.plaintext-only Chrome5/25/2016 Firefox3/4/20253205
css.selectors.open πŸ“‹Chrome2/4/2025 Firefox3/4/202528
Chrome: The selector is recognized, but has no effect.Chrome Android: The selector is recognized, but has no effect.Edge: The selector is recognized, but has no effect.Opera: The selector is recognized, but has no effect.Opera Android: The selector is recognized, but has no effect.Samsung Internet: The selector is recognized, but has no effect.WebView Android: The selector is recognized, but has no effect.
html.global_attributes.contenteditable.plaintext-only Chrome5/25/2016 Firefox3/4/20253205
javascript.builtins.Intl.DurationFormat πŸ“‹Chrome9/17/2024 Firefox3/4/2025168
javascript.builtins.Intl.DurationFormat.DurationFormat πŸ“‹Chrome9/17/2024 Firefox3/4/2025168
javascript.builtins.Intl.DurationFormat.format πŸ“‹Chrome9/17/2024 Firefox3/4/2025168
javascript.builtins.Intl.DurationFormat.formatToParts πŸ“‹Chrome9/17/2024 Firefox3/4/2025168
javascript.builtins.Intl.DurationFormat.resolvedOptions πŸ“‹Chrome9/17/2024 Firefox3/4/2025168
javascript.builtins.Intl.DurationFormat.supportedLocalesOf πŸ“‹Chrome9/17/2024 Firefox3/4/2025168

2025/2

API First Browser Date Last Browser Date Days Notes
api.ClipboardItem.ClipboardItem πŸ“‹Firefox6/11/2024 Chrome2/4/2025238
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.PointerEvent.pointerType.fractional_coordinates Chrome1/23/2018 Firefox2/4/20252569
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.PublicKeyCredential.getClientCapabilities_static πŸ“‹Chrome2/4/2025 Firefox2/4/2025
api.RTCStatsReport.type_inbound-rtp.mid πŸ“‹Chrome9/2/2022 Firefox2/4/2025886
api.RTCStatsReport.type_outbound-rtp.mid πŸ“‹Chrome9/2/2022 Firefox2/4/2025886
api.RTCStatsReport.type_outbound-rtp.rid πŸ“‹Chrome9/2/2022 Firefox2/4/2025886
api.SubtleCrypto.deriveBits.x25519 πŸ“‹Firefox9/3/2024 Chrome2/4/2025154
api.SubtleCrypto.deriveKey.x25519 πŸ“‹Firefox9/3/2024 Chrome2/4/2025154
api.SubtleCrypto.exportKey.x25519 πŸ“‹Firefox9/3/2024 Chrome2/4/2025154
api.SubtleCrypto.generateKey.x25519 πŸ“‹Firefox9/3/2024 Chrome2/4/2025154
api.SubtleCrypto.importKey.x25519 πŸ“‹Firefox9/3/2024 Chrome2/4/2025154
css.types.attr.declaration-value πŸ“‹Firefox10/24/2023 Chrome2/4/2025469
javascript.builtins.JSON.isRawJSON πŸ“‹Chrome5/30/2023 Firefox2/4/2025616
javascript.builtins.JSON.parse.reviver_parameter_context_argument πŸ“‹Chrome5/30/2023 Firefox2/4/2025616
javascript.builtins.JSON.rawJSON πŸ“‹Chrome5/30/2023 Firefox2/4/2025616
webassembly.memory64 πŸ“‹Firefox1/7/2025 Chrome2/4/202528

2025/1

API First Browser Date Last Browser Date Days Notes
api.HTMLElement.beforetoggle_event.dialog_elements πŸ“‹Firefox11/26/2024 Chrome1/14/202549
api.HTMLElement.toggle_event.dialog_elements πŸ“‹Firefox11/26/2024 Chrome1/14/202549
api.IDBRequest.error.transient_unrecoverable_read_errors πŸ“‹Firefox7/17/2012 Chrome1/14/20254564
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.PushMessageData.bytes πŸ“‹Firefox7/9/2024 Chrome1/14/2025189
api.Request.bytes πŸ“‹Firefox7/9/2024 Chrome1/14/2025189
api.Response.bytes πŸ“‹Firefox7/9/2024 Chrome1/14/2025189
css.properties.writing-mode.sideways-lr Firefox12/15/2015 Chrome1/14/20253318
css.properties.writing-mode.sideways-rl Firefox12/15/2015 Chrome1/14/20253318
api.PushManager.supportedContentEncodings_static πŸ“‹Chrome7/25/2017 Firefox1/7/20252723
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.
css.properties.align-self.position_absolute_context πŸ“‹Chrome2/20/2024 Firefox1/7/2025322
css.properties.justify-self.position_absolute_context πŸ“‹Chrome2/20/2024 Firefox1/7/2025322
css.properties.place-self.position_absolute_context πŸ“‹Chrome2/20/2024 Firefox1/7/2025322
javascript.builtins.Promise.try πŸ“‹Chrome8/20/2024 Firefox1/7/2025140
webassembly.api.Module.Module.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.api.compileStreaming_static.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.api.compile_static.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.api.instantiateStreaming_static.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.api.instantiate_static.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.api.validate_static.compile_options πŸ“‹Chrome10/15/2024 Firefox1/7/202584
webassembly.jsStringBuiltins πŸ“‹Chrome10/15/2024 Firefox1/7/202584

2024/11

API First Browser Date Last Browser Date Days Notes
api.EventSource.worker_support Chrome9/2/2010 Firefox11/26/20245199
Firefox: Not supported in service workers.Firefox for Android: Not supported in service workers.
api.HTMLMediaElement.waitingforkey_event πŸ“‹Chrome12/1/2016 Firefox11/26/20242917
Firefox: The onwaitingforkey event handler property is not supported.Firefox for Android: The onwaitingforkey event handler property is not supported.
api.ImageDecoder πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.ImageDecoder πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.close πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.complete πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.completed πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.decode πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.isTypeSupported_static πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.reset πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.tracks πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageDecoder.type πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrack πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrack.animated πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrack.frameCount πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrack.repetitionCount πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrack.selected πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrackList πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrackList.length πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrackList.ready πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrackList.selectedIndex πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.ImageTrackList.selectedTrack πŸ“‹Chrome9/21/2021 Firefox11/26/20241162
api.Request.Request.init_keepalive_parameter πŸ“‹Chrome4/17/2018 Firefox11/26/20242415
api.Request.keepalive πŸ“‹Chrome4/17/2018 Firefox11/26/20242415
api.WorkerNavigator.permissions πŸ“‹Chrome5/19/2015 Firefox11/26/20243479
api.fetch.init_keepalive_parameter Chrome4/17/2018 Firefox11/26/20242415
css.properties.container-type.weak_containment πŸ“‹Chrome9/17/2024 Firefox11/26/202470

2024/10

API First Browser Date Last Browser Date Days Notes
api.CSSNestedDeclarations πŸ“‹Chrome10/15/2024 Firefox10/29/202414
api.CSSNestedDeclarations.style πŸ“‹Chrome10/15/2024 Firefox10/29/202414
api.HTMLImageElement.fetchPriority πŸ“‹Chrome5/24/2022 Firefox10/29/2024889
api.HTMLLinkElement.fetchPriority πŸ“‹Chrome5/24/2022 Firefox10/29/2024889
api.HTMLScriptElement.fetchPriority πŸ“‹Chrome5/24/2022 Firefox10/29/2024889
api.HTMLVideoElement.cancelVideoFrameCallback πŸ“‹Chrome5/19/2020 Firefox10/29/20241624
api.HTMLVideoElement.requestVideoFrameCallback πŸ“‹Chrome5/19/2020 Firefox10/29/20241624
api.MediaStreamTrack.getCapabilities πŸ“‹Chrome6/5/2017 Firefox10/29/20242703
api.Notification.silent πŸ“‹Chrome5/19/2015 Firefox10/29/20243451
api.Permissions.permission_camera Chrome1/23/2018 Firefox10/29/20242471
api.Permissions.permission_microphone Chrome1/23/2018 Firefox10/29/20242471
api.Request.Request.init_priority_parameter πŸ“‹Chrome4/26/2022 Firefox10/29/2024917
api.WebGL2RenderingContext.drawingBufferColorSpace πŸ“‹Chrome8/2/2022 Firefox10/29/2024819
Firefox: Accidental early exposure with no functionality.Firefox for Android: Accidental early exposure with no functionality.
api.WebGL2RenderingContext.unpackColorSpace πŸ“‹Chrome8/2/2022 Firefox10/29/2024819
api.WebGLRenderingContext.drawingBufferColorSpace πŸ“‹Chrome8/2/2022 Firefox10/29/2024819
Firefox: Accidental early exposure with no functionality.Firefox for Android: Accidental early exposure with no functionality.
api.WebGLRenderingContext.unpackColorSpace πŸ“‹Chrome8/2/2022 Firefox10/29/2024819
api.fetch.init_priority_parameter Chrome4/26/2022 Firefox10/29/2024917
html.elements.img.fetchpriority πŸ“‹Chrome4/26/2022 Firefox10/29/2024917
html.elements.link.fetchpriority πŸ“‹Chrome4/26/2022 Firefox10/29/2024917
html.elements.script.fetchpriority πŸ“‹Chrome4/26/2022 Firefox10/29/2024917
http.headers.Link.fetchpriority πŸ“‹Chrome6/21/2022 Firefox10/29/2024861
javascript.regular_expressions.modifier πŸ“‹Chrome5/14/2024 Firefox10/29/2024168
css.properties.box-decoration-break πŸ“‹Firefox9/2/2014 Chrome10/15/20243696
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“‹Firefox9/2/2014 Chrome10/15/20243696
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“‹Firefox9/2/2014 Chrome10/15/20243696
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.text-wrap.auto πŸ“‹Firefox12/19/2023 Chrome10/15/2024301
css.properties.text-wrap.stable πŸ“‹Firefox12/19/2023 Chrome10/15/2024301
css.properties.text-wrap-mode πŸ“‹Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-mode.nowrap Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-mode.wrap Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-style πŸ“‹Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-style.auto πŸ“‹Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-style.balance πŸ“‹Firefox3/19/2024 Chrome10/15/2024210
css.properties.text-wrap-style.stable πŸ“‹Firefox3/19/2024 Chrome10/15/2024210
api.Document.fragmentDirective πŸ“‹Chrome10/20/2020 Firefox10/1/20241442
api.FragmentDirective πŸ“‹Chrome4/7/2020 Firefox10/1/20241638
api.PointerEvent.PointerEvent.options_altitudeAngle_parameter Chrome10/20/2020 Firefox10/1/20241442
api.PointerEvent.PointerEvent.options_azimuthAngle_parameter Chrome10/20/2020 Firefox10/1/20241442
api.PointerEvent.altitudeAngle πŸ“‹Chrome10/20/2020 Firefox10/1/20241442
api.PointerEvent.azimuthAngle πŸ“‹Chrome10/20/2020 Firefox10/1/20241442
css.selectors.target-text πŸ“‹Chrome3/2/2021 Firefox10/1/20241309
html.elements.a.text_fragments Chrome2/4/2020 Firefox10/1/20241701
http.headers.Set-Cookie.SameSite.none_requires_secure Chrome2/4/2020 Firefox10/1/20241701
javascript.builtins.Iterator.Iterator πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.drop πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.every πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.filter πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.find πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.flatMap πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.forEach πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.from πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.map πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.reduce πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.some πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.take πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
javascript.builtins.Iterator.toArray πŸ“‹Chrome2/20/2024 Firefox10/1/2024224
webassembly.api.JSTag_static πŸ“‹Chrome7/18/2023 Firefox10/1/2024441

2024/9

API First Browser Date Last Browser Date Days Notes
api.PublicKeyCredential.parseCreationOptionsFromJSON_static πŸ“‹Firefox10/24/2023 Chrome9/17/2024329
api.PublicKeyCredential.parseRequestOptionsFromJSON_static πŸ“‹Firefox10/24/2023 Chrome9/17/2024329
api.PublicKeyCredential.toJSON πŸ“‹Firefox10/24/2023 Chrome9/17/2024329
api.RTCDataChannel.binaryType.blob_value Firefox6/25/2013 Chrome9/17/20244102
css.at-rules.media.prefers-color-scheme.respects-inherited-scheme Firefox9/20/2022 Chrome9/17/2024728
Chrome: Only supports SVG images, not iframes.Chrome Android: Only supports SVG images, not iframes.Edge: Only supports SVG images, not iframes.Opera: Only supports SVG images, not iframes.Opera Android: Only supports SVG images, not iframes.Samsung Internet: Only supports SVG images, not iframes.WebView Android: Only supports SVG images, not iframes.
api.AudioData πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.AudioData πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.allocationSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.clone πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.copyTo πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.duration πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.format πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.numberOfChannels πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.numberOfFrames πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.sampleRate πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioData.timestamp πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.AudioDecoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.configure πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.decode πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.decodeQueueSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.dequeue_event πŸ“‹Chrome9/27/2022 Firefox9/3/2024707
api.AudioDecoder.flush πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.isConfigSupported_static πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.reset πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioDecoder.state πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.AudioEncoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.configure πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.configure.bitrateMode πŸ“‹Chrome10/31/2023 Firefox9/3/2024308
api.AudioEncoder.configure.opus πŸ“‹Chrome2/7/2023 Firefox9/3/2024574
api.AudioEncoder.dequeue_event πŸ“‹Chrome9/27/2022 Firefox9/3/2024707
api.AudioEncoder.encode πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.encodeQueueSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.flush πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.isConfigSupported_static πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.reset πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.AudioEncoder.state πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.CSPViolationReportBody πŸ“‹Chrome4/23/2019 Firefox9/3/20241960
api.Element.contentvisibilityautostatechange_event πŸ“‹Chrome11/29/2022 Firefox9/3/2024644
Firefox: The oncontentvisibilityautostatechange event handler property is not supported.Firefox for Android: The oncontentvisibilityautostatechange event handler property is not supported.
api.EncodedAudioChunk πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.EncodedAudioChunk πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.byteLength πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.copyTo πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.duration πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.timestamp πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedAudioChunk.type πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.EncodedVideoChunk πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.byteLength πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.copyTo πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.duration πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.timestamp πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.EncodedVideoChunk.type πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.HTMLDetailsElement.name πŸ“‹Chrome12/5/2023 Firefox9/3/2024273
api.VideoColorSpace πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.VideoColorSpace πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.fullRange πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.matrix πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.primaries πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.toJSON πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoColorSpace.transfer πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.VideoDecoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.configure πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.decode πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.decodeQueueSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.dequeue_event πŸ“‹Chrome9/27/2022 Firefox9/3/2024707
api.VideoDecoder.flush πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.isConfigSupported_static πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.reset πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoDecoder.state πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.VideoEncoder πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.configure πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.dequeue_event πŸ“‹Chrome9/27/2022 Firefox9/3/2024707
api.VideoEncoder.encode πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.encodeQueueSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.flush πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.isConfigSupported_static πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.reset πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoEncoder.state πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.VideoFrame πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.allocationSize πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.clone πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.close πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.codedHeight πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.codedRect πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.codedWidth πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.colorSpace πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.copyTo πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.displayHeight πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.displayWidth πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.duration πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.format πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.timestamp πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
api.VideoFrame.visibleRect πŸ“‹Chrome9/21/2021 Firefox9/3/20241078
css.properties.hyphens.language_czech Chrome4/4/2023 Firefox9/3/2024518
css.properties.hyphens.language_slovak Chrome4/4/2023 Firefox9/3/2024518
html.elements.details.name Chrome12/5/2023 Firefox9/3/2024273
http.headers.Content-Security-Policy.report-to πŸ“‹Chrome10/16/2018 Firefox9/3/20242149
http.headers.Report-To Chrome10/16/2018 Firefox9/3/20242149
http.headers.Reporting-Endpoints πŸ“‹Chrome11/15/2021 Firefox9/3/20241023

2024/8

API First Browser Date Last Browser Date Days Notes
api.CaretPosition πŸ“‹Firefox4/2/2013 Chrome8/20/20244158
api.CaretPosition.getClientRect πŸ“‹Firefox8/6/2013 Chrome8/20/20244032
api.CaretPosition.offset πŸ“‹Firefox4/2/2013 Chrome8/20/20244158
api.CaretPosition.offsetNode πŸ“‹Firefox4/2/2013 Chrome8/20/20244158
api.Document.caretPositionFromPoint πŸ“‹Firefox4/2/2013 Chrome8/20/20244158
api.Element.ariaColIndexText πŸ“‹Firefox10/24/2023 Chrome8/20/2024301
api.Element.ariaRowIndexText πŸ“‹Firefox10/24/2023 Chrome8/20/2024301
api.Element.currentCSSZoom πŸ“‹Firefox5/14/2024 Chrome8/20/202498
api.ElementInternals.ariaColIndexText πŸ“‹Firefox10/24/2023 Chrome8/20/2024301
api.ElementInternals.ariaRowIndexText πŸ“‹Firefox10/24/2023 Chrome8/20/2024301
api.MediaSession.setActionHandler.skipad_type Firefox10/20/2020 Chrome8/20/20241400
api.Navigator.canShare πŸ“‹Firefox1/11/2022 Chrome8/20/2024952
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.share πŸ“‹Firefox12/10/2019 Chrome8/20/20241715
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.ruby-align πŸ“‹Firefox5/12/2015 Chrome8/20/20243388
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 Chrome8/20/20243388
css.properties.ruby-align.space-around πŸ“‹Firefox5/12/2015 Chrome8/20/20243388
css.properties.ruby-align.space-between πŸ“‹Firefox5/12/2015 Chrome8/20/20243388
css.properties.ruby-align.start πŸ“‹Firefox5/12/2015 Chrome8/20/20243388
api.CSSStartingStyleRule πŸ“‹Chrome9/12/2023 Firefox8/6/2024329
api.Element.auxclick_event.type_pointerevent Chrome7/20/2021 Firefox8/6/20241113
api.Element.click_event.type_pointerevent Chrome7/20/2021 Firefox8/6/20241113
api.Element.contextmenu_event.type_pointerevent Chrome7/20/2021 Firefox8/6/20241113
api.GeolocationCoordinates.toJSON πŸ“‹Chrome6/11/2024 Firefox8/6/202456
api.GeolocationPosition.toJSON πŸ“‹Chrome6/11/2024 Firefox8/6/202456
api.MediaCapabilities.decodingInfo.configuration_keySystemConfiguration_parameter πŸ“‹Chrome2/4/2020 Firefox8/6/20241645
api.PerformanceResourceTiming.responseStatus πŸ“‹Chrome1/10/2023 Firefox8/6/2024574
api.RTCDTMFSender.canInsertDTMF πŸ“‹Chrome5/21/2013 Firefox8/6/20244095
api.TextEvent πŸ“‹Chrome12/11/2008 Firefox8/6/20245717
api.TextEvent.data πŸ“‹Chrome12/11/2008 Firefox8/6/20245717
api.TextEvent.initTextEvent πŸ“‹Chrome12/11/2008 Firefox8/6/20245717
css.at-rules.starting-style πŸ“‹Chrome9/12/2023 Firefox8/6/2024329
css.properties.transition.transition-behavior Chrome9/12/2023 Firefox8/6/2024329
css.properties.transition-behavior πŸ“‹Chrome9/12/2023 Firefox8/6/2024329
css.properties.transition-behavior.allow-discrete πŸ“‹Chrome9/12/2023 Firefox8/6/2024329
css.properties.transition-behavior.normal πŸ“‹Chrome9/12/2023 Firefox8/6/2024329
javascript.regular_expressions.named_capturing_group.duplicate_named_capturing_groups Chrome5/14/2024 Firefox8/6/202484

2024/7

API First Browser Date Last Browser Date Days Notes
api.HTMLInputElement.selectionchange_event πŸ“‹Firefox9/7/2021 Chrome7/23/20241050
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.HTMLTextAreaElement.selectionchange_event πŸ“‹Firefox9/7/2021 Chrome7/23/20241050
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.
css.properties.font-size-adjust πŸ“‹Firefox6/17/2008 Chrome7/23/20245880
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.from-font πŸ“‹Firefox9/26/2023 Chrome7/23/2024301
css.properties.font-size-adjust.none πŸ“‹Firefox6/17/2008 Chrome7/23/20245880
css.properties.font-size-adjust.two-values Firefox9/7/2021 Chrome7/23/20241050
api.CSS.registerProperty_static πŸ“‹Chrome10/22/2019 Firefox7/9/20241722
api.CSSPropertyRule πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
api.CSSPropertyRule.inherits πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
api.CSSPropertyRule.initialValue πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
api.CSSPropertyRule.name πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
api.CSSPropertyRule.syntax πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
api.Document.parseHTMLUnsafe_static πŸ“‹Chrome4/16/2024 Firefox7/9/202484
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.attachShadow.options_serializable_parameter πŸ“‹Chrome5/14/2024 Firefox7/9/202456
api.Element.getHTML πŸ“‹Chrome5/14/2024 Firefox7/9/202456
api.HTMLBaseElement.href.forbid_special_characters Chrome9/5/2017 Firefox7/9/20242499
api.HTMLTemplateElement.shadowRootSerializable πŸ“‹Chrome5/14/2024 Firefox7/9/202456
api.MediaKeys.getStatusForPolicy πŸ“‹Chrome3/12/2019 Firefox7/9/20241946
api.RTCRtpReceiver.getParameters πŸ“‹Chrome6/5/2017 Firefox7/9/20242591
api.RTCRtpReceiver.getParameters.return_object_property_codecs πŸ“‹Chrome9/4/2018 Firefox7/9/20242135
api.RTCRtpSender.getParameters.return_object_property_codecs πŸ“‹Chrome9/4/2018 Firefox7/9/20242135
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“‹Chrome9/4/2018 Firefox7/9/20242135
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpTransceiver.setCodecPreferences πŸ“‹Chrome7/30/2019 Firefox7/9/20241806
api.ShadowRoot.getHTML πŸ“‹Chrome5/14/2024 Firefox7/9/202456
api.ShadowRoot.serializable πŸ“‹Chrome5/14/2024 Firefox7/9/202456
css.at-rules.property πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
css.at-rules.property.inherits πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
css.at-rules.property.initial-value πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
css.at-rules.property.syntax πŸ“‹Chrome8/25/2020 Firefox7/9/20241414
css.properties.content.alt_text Chrome9/10/2019 Firefox7/9/20241764
css.types.calc.color_component Chrome10/31/2023 Firefox7/9/2024252
css.types.color.color.relative_syntax πŸ“‹Chrome10/31/2023 Firefox7/9/2024252
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.relative_syntax πŸ“‹Chrome5/14/2024 Firefox7/9/202456
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.relative_syntax πŸ“‹Chrome5/14/2024 Firefox7/9/202456
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.lab.relative_syntax πŸ“‹Chrome10/31/2023 Firefox7/9/2024252
css.types.color.lch.relative_syntax πŸ“‹Chrome10/31/2023 Firefox7/9/2024252
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.oklab.relative_syntax πŸ“‹Chrome2/20/2024 Firefox7/9/2024140
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.
css.types.color.oklch.relative_syntax πŸ“‹Chrome2/20/2024 Firefox7/9/2024140
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.relative_syntax πŸ“‹Chrome2/20/2024 Firefox7/9/2024140
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.
http.headers.Priority πŸ“‹Chrome4/16/2024 Firefox7/9/202484
javascript.builtins.ArrayBuffer.ArrayBuffer.maxByteLength_option πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.ArrayBuffer.maxByteLength πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.ArrayBuffer.resizable πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.ArrayBuffer.resize πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer.maxByteLength_option πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.SharedArrayBuffer.grow πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.SharedArrayBuffer.growable πŸ“‹Chrome3/7/2023 Firefox7/9/2024490
javascript.builtins.SharedArrayBuffer.maxByteLength πŸ“‹Chrome3/7/2023 Firefox7/9/2024490

2024/6

API First Browser Date Last Browser Date Days Notes
api.Clipboard.read πŸ“‹Chrome7/30/2019 Firefox6/11/20241778
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 Chrome7/30/2019 Firefox6/11/20241778
api.Clipboard.type_text-html Chrome10/20/2020 Firefox6/11/20241330
api.Clipboard.type_text-plain Chrome7/30/2019 Firefox6/11/20241778
api.Clipboard.write πŸ“‹Chrome7/30/2019 Firefox6/11/20241778
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“‹Chrome7/30/2019 Firefox6/11/20241778
api.ClipboardItem.getType πŸ“‹Chrome7/30/2019 Firefox6/11/20241778
api.ClipboardItem.supports_static πŸ“‹Chrome1/23/2024 Firefox6/11/2024140
api.ClipboardItem.types πŸ“‹Chrome7/30/2019 Firefox6/11/20241778
api.URL.parse_static πŸ“‹Firefox5/14/2024 Chrome6/11/202428
api.VTTCue.text.all_html_character_references Chrome12/6/2017 Firefox6/11/20242379
css.types.gradient.conic-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.conic-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.linear-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.linear-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.radial-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.radial-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-conic-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-conic-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-linear-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-linear-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-radial-gradient.hue_interpolation_method Chrome3/7/2023 Firefox6/11/2024462
css.types.gradient.repeating-radial-gradient.interpolation_color_space Chrome3/7/2023 Firefox6/11/2024462
html.elements.base.href.forbid_data_javascript_urls Chrome4/19/2017 Firefox6/11/20242610
html.elements.link.rel.dns-prefetch πŸ“‹Chrome10/13/2015 Firefox6/11/20243164
Firefox: Only HTTP pages were supported.Firefox for Android: Only HTTP pages were supported.
http.mixed-content.auto_upgrade_images πŸ“‹Chrome10/20/2020 Firefox6/11/20241330
Firefox: Set security.mixed_content.upgrade_display_content preference to true to allow HTTP fetching and display of upgradable content.Firefox: Set security.mixed_content.block_display_content preference to true to block all mixed content.Firefox for Android: Set security.mixed_content.upgrade_display_content preference to true to allow HTTP fetching and display of upgradable content.Firefox for Android: Set security.mixed_content.block_display_content preference to true to block all mixed content.
http.mixed-content.auto_upgrade_video_audio πŸ“‹Chrome2/4/2020 Firefox6/11/20241589
Firefox: Set security.mixed_content.upgrade_display_content preference to true to allow HTTP fetching and display of upgradable content.Firefox: Set security.mixed_content.block_display_content preference to true to block all mixed content.Firefox for Android: Set security.mixed_content.upgrade_display_content preference to true to allow HTTP fetching and display of upgradable content.Firefox for Android: Set security.mixed_content.block_display_content preference to true to block all mixed content.
javascript.builtins.Set.difference πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.intersection πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.isDisjointFrom πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.isSubsetOf πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.isSupersetOf πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.symmetricDifference πŸ“‹Chrome2/20/2024 Firefox6/11/2024112
javascript.builtins.Set.union πŸ“‹Chrome2/20/2024 Firefox6/11/2024112

2024/5

API First Browser Date Last Browser Date Days Notes
api.CustomStateSet πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.@@iterator πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.add πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.clear πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.delete πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.entries πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.forEach πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.has πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.keys πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.size πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.CustomStateSet.values πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.ElementInternals.states πŸ“‹Chrome4/13/2021 Firefox5/14/20241127
api.IDBFactory.databases πŸ“‹Chrome1/29/2019 Firefox5/14/20241932
api.IDBTransaction.durability πŸ“‹Chrome5/19/2020 Firefox5/14/20241456
api.Navigator.wakeLock πŸ“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome7/27/2020 Firefox5/14/20241387
Firefox: The value is recognized, but has no effect.Firefox for Android: The value is recognized, but has no effect.
api.RTCIceCandidate.address πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.component πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.foundation πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.port πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.priority πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.protocol πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.relatedAddress πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.relatedPort πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.tcpType πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.RTCIceCandidate.type πŸ“‹Chrome4/23/2019 Firefox5/14/20241848
api.WakeLock πŸ“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome7/27/2020 Firefox5/14/20241387
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“‹Chrome11/17/2020 Firefox5/14/20241274
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“‹Chrome7/27/2020 Firefox5/14/20241387
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.WebSocket.WebSocket.url_parameter_http_https_relative Firefox3/19/2024 Chrome5/14/202456
css.properties.zoom πŸ“‹Chrome12/11/2008 Firefox5/14/20245633
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“‹Chrome5/14/2024 Firefox5/14/2024
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().
css.types.mod πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
css.types.mod.mixed_type_parameters πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
css.types.rem πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
css.types.rem.mixed_type_parameters πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
css.types.round πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
css.types.round.mixed_type_parameters πŸ“‹Firefox9/26/2023 Chrome5/14/2024231
html.elements.iframe.allow.screen-wake-lock πŸ“‹Chrome7/27/2020 Firefox5/14/20241387
http.headers.Accept-Encoding.zstd πŸ“‹Chrome3/19/2024 Firefox5/14/202456
Safari: Before macOS 26.3 Tahoe, this header value is not sent.
http.headers.Content-Encoding.zstd πŸ“‹Chrome3/19/2024 Firefox5/14/202456
Safari: Before macOS 26.3 Tahoe, Safari cannot decode Zstandard responses.

2024/4

API First Browser Date Last Browser Date Days Notes
api.AbortSignal.timeout_static πŸ“‹Firefox5/3/2022 Chrome4/16/2024714
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.CanvasRenderingContext2D.isContextLost πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.Clipboard.readText πŸ“‹Chrome4/17/2018 Firefox4/16/20242191
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.ContentVisibilityAutoStateChangeEvent πŸ“‹Chrome11/29/2022 Firefox4/16/2024504
api.ContentVisibilityAutoStateChangeEvent.ContentVisibilityAutoStateChangeEvent πŸ“‹Chrome11/29/2022 Firefox4/16/2024504
api.ContentVisibilityAutoStateChangeEvent.skipped πŸ“‹Chrome11/29/2022 Firefox4/16/2024504
api.Element.ariaBrailleLabel πŸ“‹Chrome10/25/2022 Firefox4/16/2024539
api.Element.ariaBrailleRoleDescription πŸ“‹Chrome10/25/2022 Firefox4/16/2024539
api.Element.attachShadow.options_clonable_parameter πŸ“‹Firefox2/20/2024 Chrome4/16/202456
api.Element.setHTMLUnsafe πŸ“‹Firefox2/20/2024 Chrome4/16/202456
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.ElementInternals.ariaBrailleLabel πŸ“‹Chrome10/25/2022 Firefox4/16/2024539
api.ElementInternals.ariaBrailleRoleDescription πŸ“‹Chrome10/25/2022 Firefox4/16/2024539
api.HTMLButtonElement.popoverTargetAction πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLButtonElement.popoverTargetElement πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLCanvasElement.contextlost_event πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.HTMLCanvasElement.contextrestored_event πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.HTMLElement.beforetoggle_event πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLElement.beforetoggle_event.popover_elements πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLElement.hidePopover πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLElement.inert.ignores_find_in_page πŸ“‹Firefox11/21/2023 Chrome4/16/2024147
api.HTMLElement.popover πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
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“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLElement.togglePopover πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLElement.togglePopover.returns_boolean Chrome8/15/2023 Firefox4/16/2024245
api.HTMLElement.toggle_event.popover_elements πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLInputElement.popoverTargetAction πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLInputElement.popoverTargetElement πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
api.HTMLTemplateElement.shadowRootClonable πŸ“‹Chrome4/16/2024 Firefox4/16/2024
api.OffscreenCanvas.contextlost_event πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.OffscreenCanvas.contextrestored_event πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.OffscreenCanvasRenderingContext2D.isContextLost πŸ“‹Chrome3/1/2022 Firefox4/16/2024777
api.RTCDtlsTransport.iceTransport πŸ“‹Chrome1/29/2019 Firefox4/16/20241904
api.RTCIceTransport πŸ“‹Chrome6/4/2019 Firefox4/16/20241778
api.RTCIceTransport.gatheringState πŸ“‹Chrome6/4/2019 Firefox4/16/20241778
api.RTCIceTransport.gatheringstatechange_event πŸ“‹Chrome6/4/2019 Firefox4/16/20241778
api.RTCIceTransport.state πŸ“‹Chrome6/4/2019 Firefox4/16/20241778
api.RTCIceTransport.statechange_event πŸ“‹Chrome6/4/2019 Firefox4/16/20241778
api.RTCRtpReceiver.jitterBufferTarget πŸ“‹Firefox7/4/2023 Chrome4/16/2024287
api.ReadableStream.@@asyncIterator πŸ“‹Firefox2/14/2023 Chrome4/16/2024427
api.ReadableStream.values πŸ“‹Firefox2/14/2023 Chrome4/16/2024427
api.ShadowRoot.clonable πŸ“‹Firefox2/20/2024 Chrome4/16/202456
api.ShadowRoot.setHTMLUnsafe πŸ“‹Firefox2/20/2024 Chrome4/16/202456
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.WebTransport.WebTransport.options_serverCertificateHashes_parameter πŸ“‹Chrome3/29/2022 Firefox4/16/2024749
css.properties.align-content.block_context πŸ“‹Chrome3/19/2024 Firefox4/16/202428
css.properties.content-visibility πŸ“‹Chrome8/25/2020 Firefox4/16/20241330
css.properties.content-visibility.auto πŸ“‹Chrome8/25/2020 Firefox4/16/20241330
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.content-visibility.hidden πŸ“‹Chrome8/25/2020 Firefox4/16/20241330
css.properties.content-visibility.visible πŸ“‹Chrome8/25/2020 Firefox4/16/20241330
css.properties.direction.vertical_slider_direction Firefox11/21/2023 Chrome4/16/2024147
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.properties.transform-box.content-box πŸ“‹Chrome10/10/2023 Firefox4/16/2024189
css.properties.transform-box.stroke-box πŸ“‹Chrome10/10/2023 Firefox4/16/2024189
css.properties.writing-mode.vertical_oriented_form_controls Firefox11/21/2023 Chrome4/16/2024147
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.popover Chrome5/30/2023 Firefox4/16/2024322
css.selectors.popover-open πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
html.elements.button.popovertarget πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
html.elements.button.popovertargetaction πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
html.elements.input.popovertarget πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
html.elements.input.popovertargetaction πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
html.elements.input.type_range.vertical_orientation Firefox11/21/2023 Chrome4/16/2024147
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.
html.elements.template.shadowrootclonable πŸ“‹Chrome4/16/2024 Firefox4/16/2024
html.global_attributes.inert.ignores_find_in_page πŸ“‹Firefox11/21/2023 Chrome4/16/2024147
html.global_attributes.popover πŸ“‹Chrome5/30/2023 Firefox4/16/2024322
javascript.builtins.Intl.Segmenter πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segmenter.Segmenter πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segmenter.resolvedOptions πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segmenter.segment πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segmenter.supportedLocalesOf πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segments πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segments.@@iterator πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
javascript.builtins.Intl.Segments.containing πŸ“‹Chrome11/17/2020 Firefox4/16/20241246
webassembly.multiMemory πŸ“‹Chrome12/5/2023 Firefox4/16/2024133

2024/3

API First Browser Date Last Browser Date Days Notes
api.AbortSignal.any_static πŸ“‹Chrome8/15/2023 Firefox3/19/2024217
api.CSSKeyframesRule.length πŸ“‹Firefox1/17/2023 Chrome3/19/2024427
api.HTMLTemplateElement.shadowRootDelegatesFocus πŸ“‹Firefox2/20/2024 Chrome3/19/202428
css.properties.paint-order πŸ“‹Firefox5/9/2018 Chrome3/19/20242141
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.text-wrap.nowrap πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.text-wrap.wrap πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space.collapse πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space.preserve πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space.preserve-breaks πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space.shorthand_values Chrome5/30/2023 Firefox3/19/2024294
Chrome: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Chrome Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Edge: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Firefox: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Firefox for Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Opera: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Opera Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.Samsung Internet: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.WebView Android: Only accepts values for white-space-collapse and text-wrap-mode, not white-space-trim.
css.properties.white-space.wrap πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space-collapse πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space-collapse.break-spaces πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space-collapse.collapse πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space-collapse.preserve πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.properties.white-space-collapse.preserve-breaks πŸ“‹Chrome5/30/2023 Firefox3/19/2024294
css.types.color.light-dark πŸ“‹Firefox11/21/2023 Chrome3/19/2024119
html.elements.template.shadowrootdelegatesfocus πŸ“‹Firefox2/20/2024 Chrome3/19/202428

2024/2

API First Browser Date Last Browser Date Days Notes
api.HTMLTemplateElement.shadowRootMode πŸ“‹Chrome3/7/2023 Firefox2/20/2024350
css.at-rules.import.supports πŸ“‹Firefox7/4/2023 Chrome2/20/2024231
css.selectors.backdrop.inherit_from_originating_element Firefox11/21/2023 Chrome2/20/202491
css.types.color.rgb.mixed_type_parameters Firefox5/9/2023 Chrome2/20/2024287
html.elements.template.shadowrootmode πŸ“‹Chrome3/7/2023 Firefox2/20/2024350
http.status.103.preload Chrome6/21/2022 Firefox2/20/2024609

2024/1

API First Browser Date Last Browser Date Days Notes
api.CSSImportRule.supportsText πŸ“‹Firefox6/6/2023 Chrome1/23/2024231
api.Element.checkVisibility.options_contentVisibilityAuto_parameter πŸ“‹Chrome1/23/2024 Firefox1/23/2024
api.Element.checkVisibility.options_opacityProperty_parameter πŸ“‹Chrome1/23/2024 Firefox1/23/2024
api.Element.checkVisibility.options_visibilityProperty_parameter πŸ“‹Chrome1/23/2024 Firefox1/23/2024
api.HTMLSelectElement.showPicker πŸ“‹Chrome1/23/2024 Firefox1/23/2024
api.HTMLVideoElement.disablePictureInPicture πŸ“‹Chrome9/4/2018 Firefox1/23/20241967
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.
api.LargestContentfulPaint πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.element πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.id πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.loadTime πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.renderTime πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.size πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.toJSON πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
api.LargestContentfulPaint.url πŸ“‹Chrome9/10/2019 Firefox1/23/20241596
css.at-rules.page.page-orientation πŸ“‹Chrome8/25/2020 Firefox1/23/20241246
css.properties.display.ruby Firefox5/12/2015 Chrome1/23/20243178
css.properties.display.ruby-text Firefox5/12/2015 Chrome1/23/20243178
css.properties.offset.auto πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.border-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.bottom πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.center πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.content-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.fill-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.left πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.normal πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.padding-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.right πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.stroke-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.top πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset.view-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.basic_shape πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.border-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.content-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.fill-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.padding-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.ray πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.stroke-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.url πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-path.view-box πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.auto πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.bottom πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.center πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.left πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.normal πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.right πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.offset-position.top πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.properties.scrollbar-color πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.properties.scrollbar-color.auto πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.properties.scrollbar-width πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.properties.scrollbar-width.auto πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.properties.scrollbar-width.none πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.properties.scrollbar-width.thin πŸ“‹Firefox12/11/2018 Chrome1/23/20241869
css.types.basic-shape.rect πŸ“‹Chrome10/31/2023 Firefox1/23/202484
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“‹Chrome10/31/2023 Firefox1/23/202484
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.color.hsl.mixed_type_parameters Chrome1/23/2024 Firefox1/23/2024
css.types.color.hwb.mixed_type_parameters Chrome1/23/2024 Firefox1/23/2024
css.types.ray πŸ“‹Chrome8/15/2023 Firefox1/23/2024161
css.types.ray.position Chrome8/15/2023 Firefox1/23/2024161
css.types.ray.size Chrome8/15/2023 Firefox1/23/2024161
html.elements.form.autocomplete.webauthn πŸ“‹Chrome11/29/2022 Firefox1/23/2024420
html.elements.hr.hr_in_select Chrome10/31/2023 Firefox1/23/202484
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 Chrome10/31/2023 Firefox1/23/202484
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“‹Chrome9/4/2018 Firefox1/23/20241967
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.
javascript.builtins.Array.fromAsync πŸ“‹Firefox7/4/2023 Chrome1/23/2024203
javascript.builtins.ArrayBuffer.detached πŸ“‹Chrome5/30/2023 Firefox1/23/2024238
javascript.builtins.ArrayBuffer.transfer πŸ“‹Chrome5/30/2023 Firefox1/23/2024238
javascript.builtins.ArrayBuffer.transferToFixedLength πŸ“‹Chrome5/30/2023 Firefox1/23/2024238

2023/12

API First Browser Date Last Browser Date Days Notes
api.HTMLIFrameElement.loading πŸ“‹Chrome9/10/2019 Firefox12/19/20231561
css.properties.text-wrap πŸ“‹Chrome5/30/2023 Firefox12/19/2023203
css.properties.text-wrap.balance πŸ“‹Chrome5/30/2023 Firefox12/19/2023203
css.selectors.has πŸ“‹Chrome9/2/2022 Firefox12/19/2023473
html.elements.iframe.loading πŸ“‹Chrome9/10/2019 Firefox12/19/20231561
javascript.builtins.Promise.withResolvers πŸ“‹Chrome10/31/2023 Firefox12/19/202349
webassembly.tail-calls πŸ“‹Chrome4/4/2023 Firefox12/19/2023259
api.FontFaceSet.check πŸ“‹Firefox9/22/2015 Chrome12/5/20232996
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.URL.canParse_static πŸ“‹Firefox7/4/2023 Chrome12/5/2023154
css.at-rules.media.scripting πŸ“‹Firefox5/9/2023 Chrome12/5/2023210
css.properties.background-clip.text πŸ“‹Firefox9/20/2016 Chrome12/5/20232632
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.mask πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
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 Chrome12/5/20232421
css.properties.mask-clip.border-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.content-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.fill-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.no-clip Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.padding-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.stroke-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-clip.view-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-composite πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
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 Chrome12/5/20232421
css.properties.mask-composite.exclude πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-composite.intersect πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-composite.subtract πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-image πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
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 Chrome12/5/20232421
css.properties.mask-mode.alpha πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-mode.luminance πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-mode.match-source πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.border-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.content-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.fill-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.padding-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.stroke-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-origin.view-box Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-position πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-repeat πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.properties.mask-size πŸ“‹Firefox4/19/2017 Chrome12/5/20232421
css.selectors.dir πŸ“‹Firefox9/20/2016 Chrome12/5/20232632
css.selectors.nesting πŸ“‹Firefox8/29/2023 Chrome12/5/202398
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.exp πŸ“‹Firefox9/26/2023 Chrome12/5/202370
css.types.hypot πŸ“‹Firefox9/26/2023 Chrome12/5/202370
css.types.log πŸ“‹Firefox9/26/2023 Chrome12/5/202370
css.types.pow πŸ“‹Firefox9/26/2023 Chrome12/5/202370
css.types.sqrt πŸ“‹Firefox9/26/2023 Chrome12/5/202370

2023/11

API First Browser Date Last Browser Date Days Notes
api.CredentialsContainer.create.publicKey_option.extensions.minPinLength Chrome2/1/2022 Firefox11/21/2023658
api.Navigator.userActivation πŸ“‹Chrome1/29/2019 Firefox11/21/20231757
api.PublicKeyCredential.authenticatorAttachment πŸ“‹Chrome2/1/2022 Firefox11/21/2023658
api.ToggleEvent πŸ“‹Chrome5/30/2023 Firefox11/21/2023175
api.ToggleEvent.ToggleEvent πŸ“‹Chrome5/30/2023 Firefox11/21/2023175
api.ToggleEvent.newState πŸ“‹Chrome5/30/2023 Firefox11/21/2023175
api.ToggleEvent.oldState πŸ“‹Chrome5/30/2023 Firefox11/21/2023175
api.UserActivation πŸ“‹Chrome1/29/2019 Firefox11/21/20231757
api.UserActivation.hasBeenActive πŸ“‹Chrome1/29/2019 Firefox11/21/20231757
api.UserActivation.isActive πŸ“‹Chrome1/29/2019 Firefox11/21/20231757
css.types.length.lh πŸ“‹Chrome1/10/2023 Firefox11/21/2023315
css.types.length.rlh πŸ“‹Chrome3/7/2023 Firefox11/21/2023259
http.headers.Link πŸ“‹Chrome6/21/2022 Firefox11/21/2023518
http.status.103 πŸ“‹Chrome6/21/2022 Firefox11/21/2023518
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 Chrome6/21/2022 Firefox11/21/2023518
webassembly.garbage-collection πŸ“‹Chrome10/31/2023 Firefox11/21/202321
webassembly.typedFunctionReferences πŸ“‹Chrome10/31/2023 Firefox11/21/202321

2023/10

API First Browser Date Last Browser Date Days Notes
api.BeforeUnloadEvent.returnValue πŸ“‹Firefox11/29/2005 Chrome10/31/20236545
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.Document.hasStorageAccess πŸ“‹Firefox1/29/2019 Chrome10/31/20231736
api.Document.requestStorageAccess πŸ“‹Firefox1/29/2019 Chrome10/31/20231736
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.Permissions.permission_storage-access πŸ“‹Firefox8/29/2023 Chrome10/31/202363
api.Window.beforeunload_event.event_returnvalue_activation Firefox8/16/2011 Chrome10/31/20234459
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.Window.beforeunload_event.preventdefault_activation Firefox8/16/2011 Chrome10/31/20234459
css.properties.clip-path.border-box πŸ“‹Firefox6/13/2017 Chrome10/31/20232331
css.properties.clip-path.content-box πŸ“‹Firefox6/13/2017 Chrome10/31/20232331
css.properties.clip-path.fill-box πŸ“‹Firefox1/24/2017 Chrome10/31/20232471
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.margin-box πŸ“‹Firefox6/13/2017 Chrome10/31/20232331
css.properties.clip-path.padding-box πŸ“‹Firefox6/13/2017 Chrome10/31/20232331
css.properties.clip-path.stroke-box πŸ“‹Firefox1/24/2017 Chrome10/31/20232471
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 Chrome10/31/20232331
css.selectors.user-invalid πŸ“‹Firefox4/19/2021 Chrome10/31/2023925
css.selectors.user-valid πŸ“‹Firefox4/19/2021 Chrome10/31/2023925
api.AuthenticatorAttestationResponse.getAuthenticatorData πŸ“‹Chrome8/25/2020 Firefox10/24/20231155
api.AuthenticatorAttestationResponse.getPublicKey πŸ“‹Chrome8/25/2020 Firefox10/24/20231155
api.AuthenticatorAttestationResponse.getPublicKeyAlgorithm πŸ“‹Chrome8/25/2020 Firefox10/24/20231155
api.AuthenticatorAttestationResponse.getTransports πŸ“‹Chrome4/23/2019 Firefox10/24/20231645
api.CredentialsContainer.create.publicKey_option.extensions.credProps πŸ“‹Chrome3/2/2021 Firefox10/24/2023966
api.Element.ariaAtomic πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaAutoComplete πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaBusy πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaChecked πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaColCount πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaColIndex πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaColSpan πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaCurrent πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaDescription πŸ“‹Chrome5/19/2020 Firefox10/24/20231253
api.Element.ariaDisabled πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaExpanded πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaHasPopup πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaHidden πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaInvalid πŸ“‹Chrome5/24/2022 Firefox10/24/2023518
api.Element.ariaKeyShortcuts πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaLabel πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaLevel πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaLive πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaModal πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaMultiLine πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaMultiSelectable πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaOrientation πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaPlaceholder πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaPosInSet πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaPressed πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaReadOnly πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRelevant Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRequired πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRoleDescription πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRowCount πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRowIndex πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaRowSpan πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaSelected πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaSetSize πŸ“‹Chrome7/27/2020 Firefox10/24/20231184
api.Element.ariaSort πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaValueMax πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaValueMin πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaValueNow πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.ariaValueText πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.Element.role πŸ“‹Chrome6/21/2022 Firefox10/24/2023490
api.ElementInternals.ariaAtomic πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaAutoComplete πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaBusy πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaChecked πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaColCount πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaColIndex πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaColSpan πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaCurrent πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaDescription πŸ“‹Chrome5/19/2020 Firefox10/24/20231253
api.ElementInternals.ariaDisabled πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaExpanded πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaHasPopup πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaHidden πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaInvalid πŸ“‹Chrome5/24/2022 Firefox10/24/2023518
api.ElementInternals.ariaKeyShortcuts πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaLabel πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaLevel πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaLive πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaModal πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaMultiLine πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaMultiSelectable πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaOrientation πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaPlaceholder πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaPosInSet πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaPressed πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaReadOnly πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRelevant Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRequired πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRoleDescription πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRowCount πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRowIndex πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaRowSpan πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaSelected πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaSetSize πŸ“‹Chrome7/27/2020 Firefox10/24/20231184
api.ElementInternals.ariaSort πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaValueMax πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaValueMin πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaValueNow πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.ariaValueText πŸ“‹Chrome4/7/2020 Firefox10/24/20231295
api.ElementInternals.role πŸ“‹Chrome6/21/2022 Firefox10/24/2023490
api.PublicKeyCredential.isConditionalMediationAvailable_static πŸ“‹Chrome11/29/2022 Firefox10/24/2023329
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_hkdf πŸ“‹Chrome3/3/2015 Firefox10/24/20233157
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_pbkdf2 πŸ“‹Chrome3/3/2015 Firefox10/24/20233157
http.headers.Cross-Origin-Embedder-Policy.credentialless πŸ“‹Chrome11/15/2021 Firefox10/24/2023708
javascript.builtins.Map.groupBy πŸ“‹Chrome9/12/2023 Firefox10/24/202342
javascript.builtins.Object.groupBy πŸ“‹Chrome9/12/2023 Firefox10/24/202342
javascript.builtins.String.isWellFormed πŸ“‹Chrome3/7/2023 Firefox10/24/2023231
javascript.builtins.String.toWellFormed πŸ“‹Chrome3/7/2023 Firefox10/24/2023231
api.SVGImageElement.crossOrigin πŸ“‹Firefox6/6/2023 Chrome10/10/2023126
api.TextMetrics.alphabeticBaseline πŸ“‹Firefox8/1/2023 Chrome10/10/202370
api.TextMetrics.hangingBaseline πŸ“‹Firefox8/1/2023 Chrome10/10/202370
api.TextMetrics.ideographicBaseline πŸ“‹Firefox8/1/2023 Chrome10/10/202370
css.at-rules.media.prefers-reduced-transparency πŸ“‹Firefox5/9/2023 Chrome10/10/2023154
css.properties.clear.inline-end πŸ“‹Firefox8/8/2017 Chrome10/10/20232254
css.properties.clear.inline-start πŸ“‹Firefox8/8/2017 Chrome10/10/20232254
css.properties.float.inline-end πŸ“‹Firefox8/8/2017 Chrome10/10/20232254
css.properties.float.inline-start πŸ“‹Firefox8/8/2017 Chrome10/10/20232254
css.properties.resize.block Firefox10/23/2018 Chrome10/10/20231813
css.properties.resize.inline Firefox10/23/2018 Chrome10/10/20231813
css.properties.transform-box.border-box πŸ“‹Firefox8/8/2017 Chrome10/10/20232254
css.types.length.cap Firefox2/8/2022 Chrome10/10/2023609
html.elements.search πŸ“‹Firefox9/26/2023 Chrome10/10/202314

2023/9

API First Browser Date Last Browser Date Days Notes
api.RTCPeerConnection.getReceivers.stopped_transceivers_removed Chrome1/19/2021 Firefox9/26/2023980
api.RTCPeerConnection.getSenders.stopped_transceivers_removed Chrome1/19/2021 Firefox9/26/2023980
api.RTCPeerConnection.getTransceivers.stopped_transceivers_removed Chrome1/19/2021 Firefox9/26/2023980
api.RTCRtpTransceiver.currentDirection.stopped_value πŸ“‹Chrome6/21/2022 Firefox9/26/2023462
api.RTCRtpTransceiver.direction.value_stopped πŸ“‹Chrome6/21/2022 Firefox9/26/2023462
api.TextMetrics.emHeightAscent πŸ“‹Chrome9/10/2019 Firefox9/26/20231477
api.TextMetrics.emHeightDescent πŸ“‹Chrome9/10/2019 Firefox9/26/20231477
html.elements.iframe.allow.publickey-credentials-get πŸ“‹Chrome7/27/2020 Firefox9/26/20231156
api.CustomElementRegistry.getName πŸ“‹Firefox8/1/2023 Chrome9/12/202342
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.URLSearchParams.delete.value_parameter Firefox7/4/2023 Chrome9/12/202370
api.URLSearchParams.has.value_parameter Firefox7/4/2023 Chrome9/12/202370
css.properties.contain-intrinsic-size.auto_none Firefox8/29/2023 Chrome9/12/202314
css.properties.font-variant-position πŸ“‹Firefox12/1/2014 Chrome9/12/20233207
css.properties.font-variant-position.normal πŸ“‹Firefox12/1/2014 Chrome9/12/20233207
css.properties.font-variant-position.sub πŸ“‹Firefox12/1/2014 Chrome9/12/20233207
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 Chrome9/12/20233207
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.grid-template-columns.subgrid πŸ“‹Firefox12/10/2019 Chrome9/12/20231372
css.properties.grid-template-rows.subgrid πŸ“‹Firefox12/10/2019 Chrome9/12/20231372
http.headers.Authorization.Digest.SHA-256 Firefox10/5/2021 Chrome9/12/2023707
http.headers.Clear-Site-Data.wildcard πŸ“‹Firefox10/23/2018 Chrome9/12/20231785
http.headers.WWW-Authenticate.Digest.SHA-256 Firefox10/5/2021 Chrome9/12/2023707
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingMode_parameter Firefox8/1/2023 Chrome9/12/202342

2023/8

API First Browser Date Last Browser Date Days Notes
api.CSSStyleRule.cssRules πŸ“‹Chrome4/4/2023 Firefox8/29/2023147
api.CSSStyleRule.deleteRule πŸ“‹Chrome4/4/2023 Firefox8/29/2023147
api.CSSStyleRule.insertRule πŸ“‹Chrome4/4/2023 Firefox8/29/2023147
api.CanvasRenderingContext2D.fontStretch πŸ“‹Chrome3/1/2022 Firefox8/29/2023546
api.CanvasRenderingContext2D.fontVariantCaps πŸ“‹Chrome3/1/2022 Firefox8/29/2023546
api.CanvasRenderingContext2D.getContextAttributes πŸ“‹Chrome3/12/2019 Firefox8/29/20231631
api.Notification.requireInteraction πŸ“‹Chrome12/1/2015 Firefox8/29/20232828
Firefox: Only supported on Windows. Behind a flag on other operating systems.Firefox for Android: Only supported on Windows. Behind a flag on other operating systems.
api.OffscreenCanvasRenderingContext2D.fontStretch πŸ“‹Chrome3/1/2022 Firefox8/29/2023546
api.OffscreenCanvasRenderingContext2D.fontVariantCaps πŸ“‹Chrome3/1/2022 Firefox8/29/2023546
api.RTCEncodedAudioFrame πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedAudioFrame.data πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedAudioFrame.getMetadata πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedAudioFrame.timestamp Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedVideoFrame πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedVideoFrame.data πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedVideoFrame.getMetadata πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedVideoFrame.timestamp Chrome10/20/2020 Firefox8/29/20231043
api.RTCEncodedVideoFrame.type πŸ“‹Chrome10/20/2020 Firefox8/29/20231043
css.properties.font-size.math Chrome1/10/2023 Firefox8/29/2023231
css.properties.math-depth πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
css.properties.math-depth.auto-add πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
css.properties.math-style πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
css.properties.math-style.compact πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
css.properties.math-style.normal πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
css.properties.text-transform.math-auto πŸ“‹Chrome1/10/2023 Firefox8/29/2023231
http.headers.Range.cors_safe Chrome3/1/2022 Firefox8/29/2023546
api.Response.body.readable_byte_stream Firefox6/28/2022 Chrome8/15/2023413
css.properties.offset-anchor πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.auto πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.bottom πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.center πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.left πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.right πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.properties.offset-anchor.top πŸ“‹Firefox1/7/2020 Chrome8/15/20231316
css.types.color.lab.mixed_type_parameters Firefox5/9/2023 Chrome8/15/202398
css.types.color.lch.mixed_type_parameters Firefox5/9/2023 Chrome8/15/202398
css.types.color.oklab.mixed_type_parameters Firefox5/9/2023 Chrome8/15/202398
css.types.color.oklch.mixed_type_parameters Firefox5/9/2023 Chrome8/15/202398
api.CanvasRenderingContext2D.textRendering πŸ“‹Chrome3/1/2022 Firefox8/1/2023518
api.HTMLInputElement.dirName πŸ“‹Chrome2/8/2012 Firefox8/1/20234192
api.HTMLMediaElement.setSinkId πŸ“‹Chrome3/2/2016 Firefox8/1/20232708
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“‹Chrome3/2/2016 Firefox8/1/20232708
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.HTMLTextAreaElement.dirName πŸ“‹Chrome2/8/2012 Firefox8/1/20234192
api.MediaDevices.enumerateDevices πŸ“‹Chrome12/1/2015 Firefox8/1/20232800
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.OffscreenCanvasRenderingContext2D.filter πŸ“‹Chrome9/4/2018 Firefox8/1/20231792
api.OffscreenCanvasRenderingContext2D.textRendering πŸ“‹Chrome3/1/2022 Firefox8/1/2023518
api.RTCStatsReport.type_media-source.frames πŸ“‹Chrome4/13/2021 Firefox8/1/2023840
api.RTCStatsReport.type_media-source.framesPerSecond πŸ“‹Chrome2/4/2020 Firefox8/1/20231274
api.RTCStatsReport.type_media-source.height πŸ“‹Chrome2/4/2020 Firefox8/1/20231274
api.RTCStatsReport.type_media-source.width πŸ“‹Chrome2/4/2020 Firefox8/1/20231274
api.TextMetrics.fontBoundingBoxAscent πŸ“‹Chrome11/17/2020 Firefox8/1/2023987
api.TextMetrics.fontBoundingBoxDescent πŸ“‹Chrome11/17/2020 Firefox8/1/2023987
css.selectors.first πŸ“‹Chrome3/28/2012 Firefox8/1/20234143
html.elements.input.dirname πŸ“‹Chrome2/8/2012 Firefox8/1/20234192
html.elements.textarea.dirname πŸ“‹Chrome2/8/2012 Firefox8/1/20234192
http.headers.Content-Security-Policy.script-src.external_scripts πŸ“‹Chrome6/5/2017 Firefox8/1/20232248
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingIncrement_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingMode_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_roundingPriority_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter.negative Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_trailingZeroDisplay_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter.string_values Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.format.number_parameter-string_decimal Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.formatRange πŸ“‹Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.NumberFormat.formatRangeToParts πŸ“‹Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingPriority_parameter Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.Intl.PluralRules.selectRange πŸ“‹Chrome9/27/2022 Firefox8/1/2023308
javascript.builtins.RegExp.unicodeSets πŸ“‹Chrome4/4/2023 Firefox8/1/2023119

2023/7

API First Browser Date Last Browser Date Days Notes
css.properties.align-content.flex_context.safe_unsafe Firefox10/23/2018 Chrome7/18/20231729
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 Chrome7/18/20231729
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 Chrome7/18/20231729
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.animation-timeline πŸ“‹Firefox2/14/2023 Chrome7/18/2023154
css.properties.animation-timeline.scroll πŸ“‹Firefox2/14/2023 Chrome7/18/2023154
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 Chrome7/18/202342
css.properties.display.multi-keyword_values Firefox10/22/2019 Chrome7/18/20231365
css.properties.justify-content.flex_context.safe_unsafe Firefox10/23/2018 Chrome7/18/20231729
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.scroll-timeline πŸ“‹Firefox3/14/2023 Chrome7/18/2023126
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 Chrome7/18/2023126
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 Chrome7/18/2023126
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 Chrome7/18/202342
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 Chrome7/18/202342
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 Chrome7/18/2023126
css.types.color.system-color.accentcolor_accentcolortext πŸ“‹Firefox7/26/2022 Chrome7/18/2023357
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.CanvasRenderingContext2D.letterSpacing πŸ“‹Chrome3/1/2022 Firefox7/4/2023490
api.CanvasRenderingContext2D.wordSpacing πŸ“‹Chrome3/1/2022 Firefox7/4/2023490
api.OffscreenCanvasRenderingContext2D.letterSpacing πŸ“‹Chrome3/1/2022 Firefox7/4/2023490
api.OffscreenCanvasRenderingContext2D.wordSpacing πŸ“‹Chrome3/1/2022 Firefox7/4/2023490
api.RTCStatsReport.type_outbound-rtp.framesPerSecond πŸ“‹Chrome7/27/2020 Firefox7/4/20231072
api.Response.json_static πŸ“‹Chrome9/2/2022 Firefox7/4/2023305
css.properties.animation-composition πŸ“‹Chrome4/4/2023 Firefox7/4/202391
css.properties.animation-composition.accumulate πŸ“‹Chrome4/4/2023 Firefox7/4/202391
css.properties.animation-composition.add πŸ“‹Chrome4/4/2023 Firefox7/4/202391
css.properties.animation-composition.replace πŸ“‹Chrome4/4/2023 Firefox7/4/202391
css.properties.baseline-source πŸ“‹Chrome3/7/2023 Firefox7/4/2023119
css.properties.baseline-source.auto πŸ“‹Chrome3/7/2023 Firefox7/4/2023119
css.properties.baseline-source.first πŸ“‹Chrome3/7/2023 Firefox7/4/2023119
css.properties.baseline-source.last πŸ“‹Chrome3/7/2023 Firefox7/4/2023119
html.elements.link.rel.modulepreload πŸ“‹Chrome4/17/2018 Firefox7/4/20231904
html.elements.link.rel.modulepreload.as-script πŸ“‹Chrome4/17/2018 Firefox7/4/20231904
http.headers.Sec-Purpose πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.Array.toReversed πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.Array.toSorted πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.Array.toSpliced πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.Array.with πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.TypedArray.toReversed πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.TypedArray.toSorted πŸ“‹Chrome2/7/2023 Firefox7/4/2023147
javascript.builtins.TypedArray.with πŸ“‹Chrome2/7/2023 Firefox7/4/2023147

2023/6

API First Browser Date Last Browser Date Days Notes
api.CredentialsContainer.create.publicKey_option.residentKey πŸ“‹Chrome3/2/2021 Firefox6/6/2023826
api.SharedWorker.SharedWorker.ecmascript_modules Chrome2/4/2020 Firefox6/6/20231218
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 Chrome2/4/2020 Firefox6/6/20231218
api.WebTransport πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.WebTransport πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.byob_readers Chrome1/10/2023 Firefox6/6/2023147
api.WebTransport.close πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.closed πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.createBidirectionalStream πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.createUnidirectionalStream πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
Firefox: Returns a WritableStream instead of a WebTransportSendStream.Firefox for Android: Returns a WritableStream instead of a WebTransportSendStream.
api.WebTransport.createUnidirectionalStream.byob_readers Chrome1/10/2023 Firefox6/6/2023147
api.WebTransport.datagrams πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.incomingBidirectionalStreams πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.incomingUnidirectionalStreams πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransport.ready πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportBidirectionalStream πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportBidirectionalStream.readable πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportBidirectionalStream.writable πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.incomingHighWaterMark πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.incomingMaxAge πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.maxDatagramSize πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.outgoingHighWaterMark πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.outgoingMaxAge πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.readable πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportDatagramDuplexStream.writable Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportError πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportError.WebTransportError πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportError.source πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.WebTransportError.streamErrorCode πŸ“‹Chrome1/4/2022 Firefox6/6/2023518
api.Worker.Worker.ecmascript_modules Chrome2/4/2020 Firefox6/6/20231218
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 Chrome2/4/2020 Firefox6/6/20231218
Deno: Only supports module
api.Worklet.ecmascript_modules Chrome2/4/2020 Firefox6/6/20231218
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.properties.-webkit-text-security Chrome12/11/2008 Firefox6/6/20235290
css.types.calc-keyword.NaN Chrome3/1/2022 Firefox6/6/2023462
css.types.calc-keyword.infinity Chrome3/1/2022 Firefox6/6/2023462
javascript.operators.import.worker_support Chrome2/4/2020 Firefox6/6/20231218
javascript.statements.import.worker_support Chrome2/4/2020 Firefox6/6/20231218

2023/5

API First Browser Date Last Browser Date Days Notes
api.Document.scrollend_event πŸ“‹Firefox1/17/2023 Chrome5/30/2023133
api.Element.scrollend_event πŸ“‹Firefox1/17/2023 Chrome5/30/2023133
css.types.overflow.overlay Firefox4/11/2023 Chrome5/30/202349
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.
webassembly.extended-constant-expressions πŸ“‹Firefox4/11/2023 Chrome5/30/202349
api.CanvasRenderingContext2D.reset πŸ“‹Chrome3/1/2022 Firefox5/9/2023434
api.CompressionStream πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
Node.js: Available as a part of the stream/web module.
api.CompressionStream.CompressionStream πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.CompressionStream.CompressionStream.deflate πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.CompressionStream.CompressionStream.deflate-raw πŸ“‹Chrome6/21/2022 Firefox5/9/2023322
api.CompressionStream.CompressionStream.gzip πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.CompressionStream.readable πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.CompressionStream.writable πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.DecompressionStream πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
Node.js: Available as a part of the stream/web module.
api.DecompressionStream.DecompressionStream πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.DecompressionStream.DecompressionStream.deflate πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.DecompressionStream.DecompressionStream.deflate-raw πŸ“‹Chrome6/21/2022 Firefox5/9/2023322
api.DecompressionStream.DecompressionStream.gzip πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.DecompressionStream.readable πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.DecompressionStream.writable πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.OffscreenCanvasRenderingContext2D.reset πŸ“‹Chrome3/1/2022 Firefox5/9/2023434
api.RTCPeerConnection.connectionState πŸ“‹Chrome1/29/2019 Firefox5/9/20231561
api.RTCPeerConnection.connectionstatechange_event πŸ“‹Chrome1/29/2019 Firefox5/9/20231561
api.RTCPeerConnection.sctp πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCRtpReceiver.getCapabilities_static πŸ“‹Chrome6/5/2017 Firefox5/9/20232164
api.RTCRtpSender.getCapabilities_static πŸ“‹Chrome9/4/2018 Firefox5/9/20231708
api.RTCRtpSender.setStreams πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport.maxChannels πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport.maxMessageSize πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport.state πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport.statechange_event Chrome7/30/2019 Firefox5/9/20231379
api.RTCSctpTransport.transport πŸ“‹Chrome7/30/2019 Firefox5/9/20231379
api.RTCStatsReport.type_media-source πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_media-source.id πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_media-source.kind πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_media-source.timestamp πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_media-source.trackIdentifier πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_media-source.type πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection.dataChannelsClosed πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection.dataChannelsOpened πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection.id πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection.timestamp πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
api.RTCStatsReport.type_peer-connection.type πŸ“‹Chrome2/4/2020 Firefox5/9/20231190
css.properties.content.gradient πŸ“‹Chrome3/26/2013 Firefox5/9/20233696
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.properties.forced-color-adjust πŸ“‹Chrome3/2/2021 Firefox5/9/2023798
css.properties.forced-color-adjust.auto πŸ“‹Chrome3/2/2021 Firefox5/9/2023798
css.properties.forced-color-adjust.none πŸ“‹Chrome3/2/2021 Firefox5/9/2023798
css.selectors.nth-child.of_syntax Chrome3/7/2023 Firefox5/9/202363
css.selectors.nth-last-child.of_syntax Chrome3/7/2023 Firefox5/9/202363
css.types.color.color πŸ“‹Chrome3/7/2023 Firefox5/9/202363
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 Chrome3/7/2023 Firefox5/9/202363
css.types.color.color-mix πŸ“‹Chrome3/7/2023 Firefox5/9/202363
css.types.color.lab πŸ“‹Chrome3/7/2023 Firefox5/9/202363
css.types.color.lch πŸ“‹Chrome3/7/2023 Firefox5/9/202363
css.types.color.oklab πŸ“‹Chrome3/7/2023 Firefox5/9/202363
css.types.color.oklch πŸ“‹Chrome3/7/2023 Firefox5/9/202363
api.HTMLInputElement.cancel_event πŸ“‹Firefox8/10/2021 Chrome5/2/2023630
api.Headers.getSetCookie πŸ“‹Firefox4/11/2023 Chrome5/2/202321
api.URLSearchParams.size πŸ“‹Firefox4/11/2023 Chrome5/2/202321
css.at-rules.media.overflow-block πŸ“‹Firefox3/19/2019 Chrome5/2/20231505
css.at-rules.media.overflow-inline πŸ“‹Firefox3/19/2019 Chrome5/2/20231505
css.at-rules.media.update πŸ“‹Firefox6/28/2022 Chrome5/2/2023308
css.properties.background-image.image-set πŸ“‹Firefox6/1/2021 Chrome5/2/2023700
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.content.image-set πŸ“‹Firefox6/1/2021 Chrome5/2/2023700
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.types.easing-function.linear-function πŸ“‹Firefox4/11/2023 Chrome5/2/202321
css.types.image.image-set πŸ“‹Firefox6/1/2021 Chrome5/2/2023700
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-storage-access-by-user-activation Firefox1/29/2019 Chrome5/2/20231554

2023/4

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.createConicGradient πŸ“‹Chrome3/1/2022 Firefox4/11/2023406
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“‹Chrome3/1/2022 Firefox4/11/2023406
api.HTMLElement.inert πŸ“‹Chrome5/24/2022 Firefox4/11/2023322
api.OffscreenCanvasRenderingContext2D.roundRect πŸ“‹Chrome3/1/2022 Firefox4/11/2023406
api.Path2D.roundRect πŸ“‹Chrome3/1/2022 Firefox4/11/2023406
html.global_attributes.inert πŸ“‹Chrome5/24/2022 Firefox4/11/2023322
api.FormData.FormData.submitter Firefox3/14/2023 Chrome4/4/202321
api.createImageBitmap.options_imageOrientation_parameter.from-image Firefox3/14/2023 Chrome4/4/202321
css.properties.hyphens.language_afrikaans Firefox11/8/2011 Chrome4/4/20234165
css.properties.hyphens.language_dutch Firefox11/8/2011 Chrome4/4/20234165
css.properties.hyphens.language_galician Firefox12/20/2011 Chrome4/4/20234123
css.properties.hyphens.language_italian Firefox12/20/2011 Chrome4/4/20234123
css.properties.hyphens.language_lithuanian Firefox11/8/2011 Chrome4/4/20234165
css.properties.hyphens.language_russian Firefox11/8/2011 Chrome4/4/20234165
css.properties.hyphens.language_swedish Firefox11/8/2011 Chrome4/4/20234165
css.properties.hyphens.language_ukrainian Firefox12/20/2011 Chrome4/4/20234123

2023/3

API First Browser Date Last Browser Date Days Notes
api.FileSystemDirectoryHandle πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.@@asyncIterator πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.entries πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.getDirectoryHandle πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.getFileHandle πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.keys πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.removeEntry πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.resolve πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemDirectoryHandle.values πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemFileHandle πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemFileHandle.createSyncAccessHandle πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemFileHandle.createWritable πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemFileHandle.getFile πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemHandle πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemHandle.isSameEntry πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemHandle.kind πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemHandle.name πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemSyncAccessHandle πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.close πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.close.sync_version Chrome11/29/2022 Firefox3/14/2023105
api.FileSystemSyncAccessHandle.flush πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.flush.sync_version Chrome11/29/2022 Firefox3/14/2023105
api.FileSystemSyncAccessHandle.getSize πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.getSize.sync_version Chrome11/29/2022 Firefox3/14/2023105
api.FileSystemSyncAccessHandle.read πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.truncate πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemSyncAccessHandle.truncate.sync_version Chrome11/29/2022 Firefox3/14/2023105
api.FileSystemSyncAccessHandle.write πŸ“‹Chrome5/24/2022 Firefox3/14/2023294
api.FileSystemWritableFileStream πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemWritableFileStream.seek πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemWritableFileStream.truncate πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.FileSystemWritableFileStream.write πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
api.HTMLElement.autocapitalize πŸ“‹Chrome4/17/2018 Firefox3/14/20231792
Chrome: Supported on HTMLInputElement and HTMLTextAreaElement only.Chrome Android: Supported on HTMLInputElement and HTMLTextAreaElement only.Opera: Supported on HTMLInputElement and HTMLTextAreaElement only.Opera Android: Supported on HTMLInputElement and HTMLTextAreaElement only.Safari on iOS: Supported on HTMLFormElement, HTMLInputElement, and HTMLTextAreaElement only.Samsung Internet: Supported on HTMLInputElement and HTMLTextAreaElement only.WebView Android: Supported on HTMLInputElement and HTMLTextAreaElement only.WebView on iOS: Supported on HTMLFormElement, HTMLInputElement, and HTMLTextAreaElement only.
api.HTMLElement.translate πŸ“‹Chrome5/15/2012 Firefox3/14/20233955
api.HTMLFormElement.rel πŸ“‹Chrome11/29/2022 Firefox3/14/2023105
api.HTMLFormElement.relList πŸ“‹Chrome11/29/2022 Firefox3/14/2023105
api.RTCStatsReport.type_inbound-rtp.trackIdentifier πŸ“‹Chrome9/2/2022 Firefox3/14/2023193
api.StorageManager.getDirectory πŸ“‹Chrome10/20/2020 Firefox3/14/2023875
css.properties.font-synthesis-small-caps πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-small-caps.auto πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-small-caps.none πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-style πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-style.auto πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-style.none πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-weight πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-weight.auto πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
css.properties.font-synthesis-weight.none πŸ“‹Chrome1/4/2022 Firefox3/14/2023434
html.elements.form.rel πŸ“‹Chrome11/29/2022 Firefox3/14/2023105
html.global_attributes.autocapitalize πŸ“‹Chrome5/19/2015 Firefox3/14/20232856
html.global_attributes.translate πŸ“‹Chrome5/15/2012 Firefox3/14/20233955
api.CSSContainerRule.containerName πŸ“‹Firefox2/14/2023 Chrome3/7/202321
api.CSSContainerRule.containerQuery πŸ“‹Firefox2/14/2023 Chrome3/7/202321
api.CSSFontFeatureValuesRule.fontFamily πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.annotation Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.character-variant Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.historical-forms Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.ornaments Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.styleset Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.stylistic Firefox12/1/2014 Chrome3/7/20233018
css.at-rules.font-feature-values.swash Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant.historical-forms πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.annotation πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.character_variant πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.historical-forms πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.normal πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.ornaments πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.styleset πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.stylistic πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.properties.font-variant-alternates.swash πŸ“‹Firefox12/1/2014 Chrome3/7/20233018
css.types.acos πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.asin πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.atan πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.atan2 πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.cos πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.sin πŸ“‹Firefox12/13/2022 Chrome3/7/202384
css.types.tan πŸ“‹Firefox12/13/2022 Chrome3/7/202384

2023/2

API First Browser Date Last Browser Date Days Notes
api.CSSContainerRule πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
api.CSSPageRule.selectorText πŸ“‹Chrome12/11/2008 Firefox2/14/20235178
api.HTMLElement.autofocus πŸ“‹Chrome12/10/2019 Firefox2/14/20231162
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“‹Chrome1/10/2023 Firefox2/14/202335
api.Permissions.permission_midi πŸ“‹Chrome5/19/2015 Firefox2/14/20232828
api.RTCPeerConnection.addTransceiver.init_sendEncodings_parameter Chrome9/4/2018 Firefox2/14/20231624
api.RTCRtpSender.getParameters.return_object_property_transactionId πŸ“‹Chrome9/4/2018 Firefox2/14/20231624
api.RTCRtpSender.setParameters.parameters_encodings_parameter.active Chrome9/4/2018 Firefox2/14/20231624
api.RTCRtpSender.setParameters.parameters_transactionId_parameter πŸ“‹Chrome9/4/2018 Firefox2/14/20231624
api.SVGElement.autofocus πŸ“‹Chrome12/10/2019 Firefox2/14/20231162
Firefox: Only supported on SVGGraphicsElement.Firefox for Android: Only supported on SVGGraphicsElement.
api.Window.deviceorientationabsolute_event πŸ“‹Chrome4/13/2016 Firefox2/14/20232498
css.at-rules.container πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.at-rules.media.color-gamut πŸ“‹Chrome4/19/2017 Firefox2/14/20232127
css.at-rules.media.color-gamut.p3 πŸ“‹Chrome4/19/2017 Firefox2/14/20232127
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“‹Chrome4/19/2017 Firefox2/14/20232127
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“‹Chrome4/19/2017 Firefox2/14/20232127
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“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container.inline-size πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container.none πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container.normal πŸ“‹Chrome1/10/2023 Firefox2/14/202335
css.properties.container.scroll-state πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container.size πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-name πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-name.none πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-type πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-type.inline-size πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-type.normal πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.container-type.size πŸ“‹Chrome9/2/2022 Firefox2/14/2023165
css.properties.page πŸ“‹Chrome8/25/2020 Firefox2/14/2023903
css.properties.page.auto πŸ“‹Chrome8/25/2020 Firefox2/14/2023903
css.types.length.container_query_length_units Chrome9/2/2022 Firefox2/14/2023165
html.elements.datalist.input_type_range πŸ“‹Chrome6/26/2012 Firefox2/14/20233885
html.elements.input.type_range.list πŸ“‹Chrome6/26/2012 Firefox2/14/20233885
html.global_attributes.autofocus πŸ“‹Chrome12/10/2019 Firefox2/14/20231162
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).
css.properties.font-variant.sub πŸ“‹Firefox12/1/2014 Chrome2/7/20232990
css.properties.font-variant.super πŸ“‹Firefox12/1/2014 Chrome2/7/20232990
css.selectors.autofill πŸ“‹Firefox2/23/2021 Chrome2/7/2023714
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.types.calc-keyword.e Firefox12/13/2022 Chrome2/7/202356

2023/1

API First Browser Date Last Browser Date Days Notes
css.at-rules.font-face.src.drop_invalid_item Chrome11/29/2022 Firefox1/17/202349
Chrome: Chrome drops invalid item for tech() but not other invalid valuesChrome Android: Chrome Android drops invalid item for tech() but not other invalid valuesEdge: Edge drops invalid item for tech() but not other invalid valuesOpera: Opera drops invalid item for tech() but not other invalid valuesOpera Android: Opera Android drops invalid item for tech() but not other invalid valuesSamsung Internet: Samsung Internet drops invalid item for tech() but not other invalid valuesWebView Android: WebView Android drops invalid item for tech() but not other invalid values
css.types.color.system-color.buttonborder πŸ“‹Chrome4/26/2022 Firefox1/17/2023266
css.types.color.system-color.mark πŸ“‹Chrome5/24/2022 Firefox1/17/2023238
css.types.color.system-color.marktext πŸ“‹Chrome5/24/2022 Firefox1/17/2023238
html.elements.form.autocomplete.one-time-code Chrome8/31/2021 Firefox1/17/2023504
html.elements.input.type_range.tick_marks Chrome5/29/2018 Firefox1/17/20231694
html.elements.textarea.autocomplete.one-time-code Chrome8/31/2021 Firefox1/17/2023504
http.headers.Content-Security-Policy.unsafe-hashes Chrome9/4/2018 Firefox1/17/20231596
api.MathMLElement πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.MathMLElement.blur πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.MathMLElement.dataset πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.MathMLElement.focus πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.MathMLElement.style πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.MathMLElement.tabIndex πŸ“‹Firefox12/10/2019 Chrome1/10/20231127
api.RTCStatsReport.type_candidate-pair.lastPacketReceivedTimestamp πŸ“‹Firefox9/28/2017 Chrome1/10/20231930
api.RTCStatsReport.type_candidate-pair.lastPacketSentTimestamp πŸ“‹Firefox9/28/2017 Chrome1/10/20231930
css.types.calc-keyword.pi Firefox12/13/2022 Chrome1/10/202328

2022/12

API First Browser Date Last Browser Date Days Notes
api.HTMLSourceElement.height πŸ“‹Chrome4/13/2021 Firefox12/13/2022609
api.HTMLSourceElement.width πŸ“‹Chrome4/13/2021 Firefox12/13/2022609
api.MIDIAccess πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIAccess.inputs πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIAccess.outputs πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIAccess.statechange_event πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
Firefox: The onstatechange event handler is supported, but the event never fires. See bug 1802149.
api.MIDIAccess.sysexEnabled πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIConnectionEvent πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIConnectionEvent.MIDIConnectionEvent πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIConnectionEvent.port πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInput πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInput.midimessage_event πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.@@iterator Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.entries Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.forEach Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.get Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.has Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.keys Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.size Chrome5/19/2015 Firefox12/13/20222765
api.MIDIInputMap.values Chrome5/19/2015 Firefox12/13/20222765
api.MIDIMessageEvent πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIMessageEvent.MIDIMessageEvent πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIMessageEvent.data πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutput πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutput.send πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.@@iterator Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.entries Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.forEach Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.get Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.has Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.keys Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.size Chrome5/19/2015 Firefox12/13/20222765
api.MIDIOutputMap.values Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.close πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.connection πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.id πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.manufacturer πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.name πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.open πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.state πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.statechange_event πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.type πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.MIDIPort.version πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
api.Navigator.requestMIDIAccess πŸ“‹Chrome5/19/2015 Firefox12/13/20222765
Firefox: API access is gated by installation of a site permission add-on (user prompt), secure context, and Permission Policy: midi.
api.Navigator.requestMIDIAccess.secure_context_required Chrome5/19/2015 Firefox12/13/20222765
api.OES_draw_buffers_indexed πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.blendEquationSeparateiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.blendEquationiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.blendFuncSeparateiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.blendFunciOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.colorMaskiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.disableiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
api.OES_draw_buffers_indexed.enableiOES πŸ“‹Chrome3/29/2022 Firefox12/13/2022259
css.properties.text-emphasis-position.over Chrome3/1/2022 Firefox12/13/2022287
css.properties.text-emphasis-position.under Chrome3/1/2022 Firefox12/13/2022287
css.types.calc-keyword πŸ“‹Chrome3/1/2022 Firefox12/13/2022287
html.elements.script.type.importmap πŸ“‹Chrome3/2/2021 Firefox12/13/2022651
html.elements.source.height πŸ“‹Chrome4/13/2021 Firefox12/13/2022609
html.elements.source.width πŸ“‹Chrome4/13/2021 Firefox12/13/2022609
http.headers.Content-Security-Policy.script-src-attr πŸ“‹Chrome6/4/2019 Firefox12/13/20221288
http.headers.Content-Security-Policy.script-src-elem πŸ“‹Chrome6/4/2019 Firefox12/13/20221288
http.headers.Content-Security-Policy.style-src-attr πŸ“‹Chrome6/4/2019 Firefox12/13/20221288
http.headers.Content-Security-Policy.style-src-elem πŸ“‹Chrome6/4/2019 Firefox12/13/20221288
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.

2022/11

API First Browser Date Last Browser Date Days Notes
api.HTMLMediaElement.srcObject πŸ“‹Firefox11/3/2015 Chrome11/29/20222583
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).
css.at-rules.font-face.src.format_keyword Firefox9/20/2022 Chrome11/29/202270
css.at-rules.font-face.src.tech_keyword Firefox11/15/2022 Chrome11/29/202214
css.at-rules.supports.font-format Firefox10/18/2022 Chrome11/29/202242
css.at-rules.supports.font-tech Firefox10/18/2022 Chrome11/29/202242
css.properties.align-items.flex_context.last_baseline Firefox3/7/2017 Chrome11/29/20222093
css.properties.align-self.flex_context.last_baseline Firefox3/7/2017 Chrome11/29/20222093
css.types.length.vb Firefox5/31/2022 Chrome11/29/2022182
css.types.length.vi Firefox5/31/2022 Chrome11/29/2022182
css.types.length.viewport_percentage_units_dynamic Firefox5/31/2022 Chrome11/29/2022182
css.types.length.viewport_percentage_units_large Firefox5/31/2022 Chrome11/29/2022182
css.types.length.viewport_percentage_units_small Firefox5/31/2022 Chrome11/29/2022182
api.CSSFontPaletteValuesRule πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
api.CSSFontPaletteValuesRule.basePalette πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
api.CSSFontPaletteValuesRule.fontFamily πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
api.CSSFontPaletteValuesRule.name πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
api.CSSFontPaletteValuesRule.overrideColors πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.at-rules.font-face.OpenType_COLRv1 Chrome2/1/2022 Firefox11/15/2022287
css.at-rules.font-palette-values πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.at-rules.font-palette-values.base-palette πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.at-rules.font-palette-values.font-family πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.at-rules.font-palette-values.override-colors πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.properties.contain-intrinsic-block-size πŸ“‹Chrome10/19/2021 Firefox11/15/2022392
css.properties.contain-intrinsic-block-size.none πŸ“‹Chrome2/1/2022 Firefox11/15/2022287
css.properties.contain-intrinsic-height πŸ“‹Chrome10/19/2021 Firefox11/15/2022392
css.properties.contain-intrinsic-height.none πŸ“‹Chrome2/1/2022 Firefox11/15/2022287
css.properties.contain-intrinsic-inline-size πŸ“‹Chrome10/19/2021 Firefox11/15/2022392
css.properties.contain-intrinsic-inline-size.none πŸ“‹Chrome2/1/2022 Firefox11/15/2022287
css.properties.contain-intrinsic-size πŸ“‹Chrome5/19/2020 Firefox11/15/2022910
css.properties.contain-intrinsic-size.none πŸ“‹Chrome2/1/2022 Firefox11/15/2022287
css.properties.contain-intrinsic-width πŸ“‹Chrome10/19/2021 Firefox11/15/2022392
css.properties.contain-intrinsic-width.none πŸ“‹Chrome2/1/2022 Firefox11/15/2022287
css.properties.font-palette πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.properties.font-palette.dark πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.properties.font-palette.light πŸ“‹Chrome4/26/2022 Firefox11/15/2022203
css.properties.font-palette.normal πŸ“‹Chrome4/26/2022 Firefox11/15/2022203

2022/10

API First Browser Date Last Browser Date Days Notes
css.properties.grid-template-columns.animation Firefox3/19/2019 Chrome10/25/20221316
css.properties.grid-template-rows.animation Firefox3/19/2019 Chrome10/25/20221316
api.Element.checkVisibility πŸ“‹Chrome9/2/2022 Firefox10/18/202246
api.Element.checkVisibility.options_checkOpacity_parameter πŸ“‹Chrome9/2/2022 Firefox10/18/202246
api.Element.checkVisibility.options_checkVisibilityCSS_parameter πŸ“‹Chrome9/2/2022 Firefox10/18/202246
api.HTMLMetaElement.media πŸ“‹Chrome8/31/2021 Firefox10/18/2022413
api.RTCStatsReport.type_inbound-rtp.audioLevel πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.concealmentEvents πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.fecPacketsDiscarded πŸ“‹Chrome4/7/2020 Firefox10/18/2022924
api.RTCStatsReport.type_inbound-rtp.fecPacketsReceived πŸ“‹Chrome4/7/2020 Firefox10/18/2022924
api.RTCStatsReport.type_inbound-rtp.headerBytesReceived πŸ“‹Chrome2/4/2020 Firefox10/18/2022987
api.RTCStatsReport.type_inbound-rtp.insertedSamplesForDeceleration πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.lastPacketReceivedTimestamp πŸ“‹Chrome2/4/2020 Firefox10/18/2022987
api.RTCStatsReport.type_inbound-rtp.qpSum πŸ“‹Chrome12/10/2019 Firefox10/18/20221043
api.RTCStatsReport.type_inbound-rtp.removedSamplesForAcceleration πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.totalAudioEnergy πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.totalDecodeTime πŸ“‹Chrome12/10/2019 Firefox10/18/20221043
api.RTCStatsReport.type_inbound-rtp.totalInterFrameDelay πŸ“‹Chrome12/10/2019 Firefox10/18/20221043
api.RTCStatsReport.type_inbound-rtp.totalProcessingDelay πŸ“‹Chrome6/21/2022 Firefox10/18/2022119
api.RTCStatsReport.type_inbound-rtp.totalSamplesDuration πŸ“‹Chrome10/20/2020 Firefox10/18/2022728
api.RTCStatsReport.type_inbound-rtp.totalSquaredInterFrameDelay πŸ“‹Chrome12/10/2019 Firefox10/18/20221043
api.RTCStatsReport.type_remote-inbound-rtp.fractionLost πŸ“‹Chrome5/25/2021 Firefox10/18/2022511
api.RTCStatsReport.type_remote-inbound-rtp.roundTripTimeMeasurements πŸ“‹Chrome5/25/2021 Firefox10/18/2022511
api.RTCStatsReport.type_remote-inbound-rtp.totalRoundTripTime πŸ“‹Chrome5/25/2021 Firefox10/18/2022511
javascript.operators.import_meta.resolve πŸ“‹Chrome9/2/2022 Firefox10/18/202246
Node.js: Returns a URL object instead of a string.

2022/9

API First Browser Date Last Browser Date Days Notes
css.properties.hyphenate-character πŸ“‹Firefox3/8/2022 Chrome9/27/2022203
css.types.length.ic Firefox2/8/2022 Chrome9/27/2022231
api.FontFace.worker_support Chrome9/4/2018 Firefox9/20/20221477
api.FontFaceSet.worker_support Chrome9/4/2018 Firefox9/20/20221477
api.HTMLCanvasElement.transferControlToOffscreen πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.OffscreenCanvas πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.convertToBlob πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.convertToBlob.option_type_parameter_webp Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.getContext πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.getContext.2d_context Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.getContext.bitmaprenderer_context Chrome7/30/2019 Firefox9/20/20221148
api.OffscreenCanvas.getContext.webgl2_context Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.getContext.webgl_context Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.height πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.transferToImageBitmap πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvas.width πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.arc πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.arcTo πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.beginPath πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.bezierCurveTo πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.canvas πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.clearRect πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.clip πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.closePath πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.createConicGradient πŸ“‹Chrome3/1/2022 Firefox9/20/2022203
api.OffscreenCanvasRenderingContext2D.createImageData πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.createLinearGradient πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.createPattern πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.createRadialGradient πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.direction πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.drawImage πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.ellipse πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.fill πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.fillRect πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.fillStyle πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.fillText πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.font πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
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.fontKerning πŸ“‹Chrome3/1/2022 Firefox9/20/2022203
api.OffscreenCanvasRenderingContext2D.getImageData πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.getLineDash πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.getTransform πŸ“‹Chrome2/4/2020 Firefox9/20/2022959
api.OffscreenCanvasRenderingContext2D.globalAlpha πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.globalCompositeOperation πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.imageSmoothingEnabled πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.isPointInPath πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.isPointInStroke πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.lineCap πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.lineDashOffset πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.lineJoin πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.lineTo πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.lineWidth πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.measureText πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.miterLimit πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.moveTo πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.putImageData πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.quadraticCurveTo πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.rect πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.resetTransform πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.restore πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.rotate πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.save πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.scale πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.setLineDash πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.setTransform πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.shadowBlur πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.shadowColor πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.shadowOffsetX πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.shadowOffsetY πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.stroke πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.strokeRect πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.strokeStyle πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.strokeText πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.textAlign πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.textBaseline πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.transform πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.OffscreenCanvasRenderingContext2D.translate πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.TextDecoderStream πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
Node.js: Available as a part of the stream/web module.
api.TextDecoderStream.TextDecoderStream πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextDecoderStream.encoding πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextDecoderStream.fatal πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextDecoderStream.ignoreBOM πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextDecoderStream.readable πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextDecoderStream.writable πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextEncoderStream πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
Node.js: Available as a part of the stream/web module.
api.TextEncoderStream.TextEncoderStream πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextEncoderStream.encoding πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextEncoderStream.readable πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.TextEncoderStream.writable πŸ“‹Chrome12/4/2018 Firefox9/20/20221386
api.WorkerGlobalScope.fonts πŸ“‹Chrome9/4/2018 Firefox9/20/20221477
api.ReadableStreamBYOBReader.releaseLock.reject_pending_read_request Firefox6/28/2022 Chrome9/2/202266
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.ReadableStreamDefaultReader.releaseLock.reject_pending_read_request Firefox6/28/2022 Chrome9/2/202266
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.
css.properties.contain.inline-size πŸ“‹Firefox5/31/2022 Chrome9/2/202294
css.selectors.modal πŸ“‹Firefox7/26/2022 Chrome9/2/202238

2022/8

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.fontKerning πŸ“‹Chrome3/1/2022 Firefox8/23/2022175
api.RTCStatsReport.type_inbound-rtp.concealedSamples πŸ“‹Chrome10/20/2020 Firefox8/23/2022672
api.RTCStatsReport.type_inbound-rtp.jitterBufferDelay πŸ“‹Chrome10/20/2020 Firefox8/23/2022672
api.RTCStatsReport.type_inbound-rtp.jitterBufferEmittedCount πŸ“‹Chrome10/20/2020 Firefox8/23/2022672
api.RTCStatsReport.type_inbound-rtp.silentConcealedSamples πŸ“‹Chrome10/20/2020 Firefox8/23/2022672
api.RTCStatsReport.type_inbound-rtp.totalSamplesReceived πŸ“‹Chrome10/20/2020 Firefox8/23/2022672
api.SVGStyleElement.disabled πŸ“‹Chrome9/1/2015 Firefox8/23/20222548
javascript.builtins.Array.findLast πŸ“‹Chrome1/4/2022 Firefox8/23/2022231
javascript.builtins.Array.findLastIndex πŸ“‹Chrome1/4/2022 Firefox8/23/2022231
javascript.builtins.TypedArray.findLast πŸ“‹Chrome1/4/2022 Firefox8/23/2022231
javascript.builtins.TypedArray.findLastIndex πŸ“‹Chrome1/4/2022 Firefox8/23/2022231
css.at-rules.media.or_syntax Firefox12/11/2018 Chrome8/2/20221330
css.at-rules.media.range_syntax Firefox6/28/2022 Chrome8/2/202235
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 Chrome8/2/20221379
css.properties.rotate πŸ“‹Firefox1/7/2020 Chrome8/2/2022938
css.properties.rotate.none πŸ“‹Firefox1/7/2020 Chrome8/2/2022938
css.properties.rotate.x_y_z_angle Firefox1/7/2020 Chrome8/2/2022938
css.properties.scale πŸ“‹Firefox1/7/2020 Chrome8/2/2022938
css.properties.scale.none πŸ“‹Firefox1/7/2020 Chrome8/2/2022938
css.properties.translate πŸ“‹Firefox1/7/2020 Chrome8/2/2022938
css.properties.translate.none πŸ“‹Firefox1/7/2020 Chrome8/2/2022938

2022/7

API First Browser Date Last Browser Date Days Notes
api.Performance.measure.measureOptions_parameter Chrome9/10/2019 Firefox7/26/20221050
api.Performance.measure.returns_performancemeasure Chrome10/22/2019 Firefox7/26/20221008
api.PerformanceMeasure.detail πŸ“‹Chrome10/22/2019 Firefox7/26/20221008
api.ReadableStream.transferable πŸ“‹Chrome11/17/2020 Firefox7/26/2022616
api.TransformStream.transferable πŸ“‹Chrome11/17/2020 Firefox7/26/2022616
api.WritableStream.transferable πŸ“‹Chrome11/17/2020 Firefox7/26/2022616
api.caches.secure_context_required Chrome3/6/2018 Firefox7/26/20221603
css.properties.backdrop-filter πŸ“‹Chrome7/30/2019 Firefox7/26/20221092
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.backdrop-filter.none πŸ“‹Chrome7/30/2019 Firefox7/26/20221092
css.properties.contain.style πŸ“‹Chrome7/20/2016 Firefox7/26/20222197
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“‹Chrome6/4/2019 Firefox7/26/20221148
css.properties.scroll-snap-stop.always πŸ“‹Chrome6/4/2019 Firefox7/26/20221148
css.properties.scroll-snap-stop.normal πŸ“‹Chrome6/4/2019 Firefox7/26/20221148
javascript.builtins.AggregateError.serializable_object Chrome2/1/2022 Firefox7/26/2022175
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.Error.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serialized properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 adds serialization of stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 adds serialization of stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serialized properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 adds serialization of stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 adds serialization of stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.EvalError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.RangeError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.ReferenceError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.SyntaxError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.TypeError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).
javascript.builtins.URIError.serializable_object πŸ“‹Chrome9/10/2019 Firefox7/26/20221050
Firefox: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).Firefox for Android: Version 103 serializable properties: name, message, cause, fileName, lineNumber and columnNumber.Firefox for Android: Version 104 also serializes stack in the main thread (window.postMessage() and structuredClone()).Firefox for Android: Version 110 also serializes stack in workers (worker.postMessage() and structuredClone()).

2022/6

API First Browser Date Last Browser Date Days Notes
api.RTCStatsReport.type_outbound-rtp.totalEncodeTime πŸ“‹Chrome2/4/2020 Firefox6/28/2022875
api.ReadableByteStreamController πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
Deno: ReadableByteStreamController is not exposed on the global scope.Node.js: Before 18.10.0, handling a BYOB pull request from a released reader is not supported.Node.js: Available as a part of the stream/web module.
api.ReadableByteStreamController.byobRequest πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableByteStreamController.close πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableByteStreamController.desiredSize πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableByteStreamController.enqueue πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableByteStreamController.error πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStream.pipeThrough πŸ“‹Chrome6/5/2017 Firefox6/28/20221849
api.ReadableStreamBYOBReader πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
Node.js: Available as a part of the stream/web module.
api.ReadableStreamBYOBReader.ReadableStreamBYOBReader πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBReader.cancel πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBReader.closed πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBReader.read πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBReader.releaseLock πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBRequest πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
Node.js: Available as a part of the stream/web module.
api.ReadableStreamBYOBRequest.respond πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBRequest.respondWithNewView πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.ReadableStreamBYOBRequest.view πŸ“‹Chrome3/2/2021 Firefox6/28/2022483
api.TransformStream πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
Node.js: Available as a part of the stream/web module.
api.TransformStream.TransformStream πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStream.readable πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStream.writable πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStreamDefaultController πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
Deno: TransformStreamDefaultController is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.TransformStreamDefaultController.desiredSize πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStreamDefaultController.enqueue πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStreamDefaultController.error πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
api.TransformStreamDefaultController.terminate πŸ“‹Chrome5/29/2018 Firefox6/28/20221491
css.properties.overflow-clip-margin πŸ“‹Chrome4/13/2021 Firefox6/28/2022441
Chrome: Only works when both axes are using overflow: clip. See bug 40235584.Chrome Android: Only works when both axes are using overflow: clip. See bug 40235584.Edge: Only works when both axes are using overflow: clip. See bug 40235584.Firefox: Only supports using a length, not a visual box. See bug 1661582.Firefox for Android: Only supports using a length, not a visual box. See bug 1661582.Quest Browser: Only works when both axes are using overflow: clip. See bug 40235584.Opera: Only works when both axes are using overflow: clip. See bug 40235584.Opera Android: Only works when both axes are using overflow: clip. See bug 40235584.Samsung Internet: Only works when both axes are using overflow: clip. See bug 40235584.WebView Android: Only works when both axes are using overflow: clip. See bug 40235584.
http.headers.Content-Security-Policy.script-src.wasm-unsafe-eval Chrome1/4/2022 Firefox6/28/2022175

2022/5

API First Browser Date Last Browser Date Days Notes
api.CSSStyleSheet.CSSStyleSheet πŸ“‹Chrome3/12/2019 Firefox5/31/20221176
api.CSSStyleSheet.replace πŸ“‹Chrome3/12/2019 Firefox5/31/20221176
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“‹Chrome3/12/2019 Firefox5/31/20221176
api.CanvasRenderingContext2D.direction πŸ“‹Chrome9/10/2019 Firefox5/31/2022994
api.DOMException.serializable_object πŸ“‹Chrome9/10/2019 Firefox5/31/2022994
api.Document.adoptedStyleSheets πŸ“‹Chrome3/12/2019 Firefox5/31/20221176
api.Document.adoptedStyleSheets.mutable πŸ“‹Chrome3/1/2022 Firefox5/31/202291
api.HTMLInputElement.showPicker πŸ“‹Chrome3/1/2022 Firefox5/31/202291
api.HTMLInputElement.showPicker.color_input Chrome3/1/2022 Firefox5/31/202291
api.HTMLInputElement.showPicker.date_input Chrome3/1/2022 Firefox5/31/202291
api.HTMLInputElement.showPicker.datetime_local_input Chrome3/1/2022 Firefox5/31/202291
api.HTMLInputElement.showPicker.file_input Chrome3/1/2022 Firefox5/31/202291
api.HTMLMediaElement.preservesPitch πŸ“‹Chrome10/20/2020 Firefox5/31/2022588
api.Performance.mark.markOptions_parameter Chrome10/22/2019 Firefox5/31/2022952
api.Performance.mark.returns_performancemark Chrome10/22/2019 Firefox5/31/2022952
api.PerformanceMark.PerformanceMark πŸ“‹Chrome7/30/2019 Firefox5/31/20221036
api.PerformanceMark.detail πŸ“‹Chrome10/22/2019 Firefox5/31/2022952
api.RTCRtpSender.setParameters.parameters_encodings_parameter.maxFramerate πŸ“‹Chrome4/7/2020 Firefox5/31/2022784
Firefox: Zero is treated as 'no fps limit' (see bug 1611957).Firefox for Android: Zero is treated as 'no fps limit' (see bug 1611957).
api.RTCStatsReport.type_inbound-rtp.frameHeight πŸ“‹Chrome10/20/2020 Firefox5/31/2022588
api.RTCStatsReport.type_inbound-rtp.frameWidth πŸ“‹Chrome10/20/2020 Firefox5/31/2022588
api.RTCStatsReport.type_inbound-rtp.framesPerSecond πŸ“‹Chrome10/20/2020 Firefox5/31/2022588
api.RTCStatsReport.type_inbound-rtp.framesReceived πŸ“‹Chrome10/20/2020 Firefox5/31/2022588
api.RTCStatsReport.type_outbound-rtp.frameHeight πŸ“‹Chrome7/27/2020 Firefox5/31/2022673
api.RTCStatsReport.type_outbound-rtp.frameWidth πŸ“‹Chrome7/27/2020 Firefox5/31/2022673
api.RTCStatsReport.type_outbound-rtp.framesSent πŸ“‹Chrome7/27/2020 Firefox5/31/2022673
api.ShadowRoot.adoptedStyleSheets πŸ“‹Chrome3/12/2019 Firefox5/31/20221176
css.at-rules.media.prefers-contrast πŸ“‹Chrome11/15/2021 Firefox5/31/2022197
api.AudioContext.outputLatency πŸ“‹Firefox10/22/2019 Chrome5/24/2022945
api.RTCStatsReport.type_outbound-rtp.headerBytesSent πŸ“‹Chrome2/4/2020 Firefox5/3/2022819
api.RTCStatsReport.type_outbound-rtp.retransmittedBytesSent πŸ“‹Chrome2/4/2020 Firefox5/3/2022819
api.RTCStatsReport.type_outbound-rtp.retransmittedPacketsSent πŸ“‹Chrome2/4/2020 Firefox5/3/2022819
api.ReadableStream.pipeTo πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.ReadableStreamDefaultReader.ReadableStreamDefaultReader πŸ“‹Chrome10/22/2019 Firefox5/3/2022924
api.WritableStream πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
Node.js: Available as a part of the stream/web module.
api.WritableStream.WritableStream πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStream.abort πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStream.close πŸ“‹Chrome4/7/2020 Firefox5/3/2022756
api.WritableStream.getWriter πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStream.locked πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultController πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
Node.js: Available as a part of the stream/web module.
api.WritableStreamDefaultController.error πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultController.signal πŸ“‹Chrome2/1/2022 Firefox5/3/202291
api.WritableStreamDefaultWriter πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
Node.js: Available as a part of the stream/web module.
api.WritableStreamDefaultWriter.WritableStreamDefaultWriter πŸ“‹Chrome10/22/2019 Firefox5/3/2022924
api.WritableStreamDefaultWriter.abort πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.close πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.closed πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.desiredSize πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.ready πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.releaseLock πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
api.WritableStreamDefaultWriter.write πŸ“‹Chrome6/5/2017 Firefox5/3/20221793
css.at-rules.media.dynamic-range πŸ“‹Chrome2/1/2022 Firefox5/3/202291
css.at-rules.media.video-dynamic-range πŸ“‹Chrome2/1/2022 Firefox5/3/202291
webassembly.api.Exception πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Exception.Exception πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Exception.Exception.options_parameter_traceStack Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Exception.getArg πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Exception.is πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Exception.stack Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Tag πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.api.Tag.Tag πŸ“‹Chrome10/19/2021 Firefox5/3/2022196
webassembly.exception-handling πŸ“‹Chrome10/19/2021 Firefox5/3/2022196

2022/4

API First Browser Date Last Browser Date Days Notes
api.MediaCapabilities.encodingInfo πŸ“‹Firefox10/23/2018 Chrome4/26/20221281
Firefox: The webrtc value of the type option is named transmission.Firefox for Android: The webrtc value of the type option is named transmission.
css.types.color.hwb πŸ“‹Firefox1/11/2022 Chrome4/26/2022105
api.DedicatedWorkerGlobalScope.cancelAnimationFrame πŸ“‹Chrome9/4/2018 Firefox4/5/20221309
api.DedicatedWorkerGlobalScope.requestAnimationFrame πŸ“‹Chrome9/4/2018 Firefox4/5/20221309
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.FetchEvent.preloadResponse πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.NavigationPreloadManager πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.NavigationPreloadManager.disable πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.NavigationPreloadManager.enable πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.NavigationPreloadManager.getState πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.NavigationPreloadManager.setHeaderValue πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
api.Navigator.pdfViewerEnabled πŸ“‹Chrome9/21/2021 Firefox4/5/2022196
api.RTCPeerConnection.setConfiguration πŸ“‹Chrome1/20/2016 Firefox4/5/20222267
api.ServiceWorkerRegistration.navigationPreload πŸ“‹Chrome6/5/2017 Firefox4/5/20221765
css.properties.mix-blend-mode.plus-lighter πŸ“‹Chrome3/29/2022 Firefox4/5/20227
css.properties.scroll-snap-type πŸ“‹Chrome9/4/2018 Firefox4/5/20221309
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.AbortSignal.throwIfAborted πŸ“‹Firefox2/8/2022 Chrome3/29/202249
api.Window.moveTo.relative-multi-screen Firefox11/9/2004 Chrome3/29/20226349
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.open.relative-multi-screen Firefox11/9/2004 Chrome3/29/20226349
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.screenLeft.relative-multi-screen Firefox12/11/2018 Chrome3/29/20221204
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.relative-multi-screen Firefox12/11/2018 Chrome3/29/20221204
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.screenX.relative-multi-screen Firefox11/9/2004 Chrome3/29/20226349
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 Firefox12/11/2018 Chrome3/29/20221204
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.ElementInternals.checkValidity πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.form πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.labels πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.reportValidity πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.setFormValue πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.setValidity πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.validationMessage πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.validity πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.ElementInternals.willValidate πŸ“‹Chrome9/10/2019 Firefox3/8/2022910
api.HTMLDialogElement πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.cancel_event πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.close πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.close_event πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.open πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.returnValue πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.show πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLDialogElement.showModal πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
api.HTMLElement.outerText πŸ“‹Chrome12/11/2008 Firefox3/8/20224835
api.RTCStatsReport.type_codec πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.channels πŸ“‹Chrome5/19/2020 Firefox3/8/2022658
api.RTCStatsReport.type_codec.clockRate πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.id πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.mimeType πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.payloadType πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.sdpFmtpLine πŸ“‹Chrome5/19/2020 Firefox3/8/2022658
api.RTCStatsReport.type_codec.timestamp πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_codec.transportId πŸ“‹Chrome3/2/2021 Firefox3/8/2022371
api.RTCStatsReport.type_codec.type πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_inbound-rtp.codecId πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_outbound-rtp.codecId πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_remote-inbound-rtp.codecId πŸ“‹Chrome2/4/2020 Firefox3/8/2022763
api.RTCStatsReport.type_remote-outbound-rtp.codecId πŸ“‹Chrome5/25/2021 Firefox3/8/2022287
api.console.profileEnd_static Chrome5/25/2010 Firefox3/8/20224305
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 Chrome5/25/2010 Firefox3/8/20224305
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 Chrome10/25/2011 Firefox3/8/20223787
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 Chrome4/19/2017 Firefox3/8/20221784
api.createImageBitmap.options_resizeHeight_parameter Chrome10/12/2016 Firefox3/8/20221973
api.createImageBitmap.options_resizeWidth_parameter Chrome10/12/2016 Firefox3/8/20221973
css.properties.hyphenate-character.auto πŸ“‹Chrome9/2/2010 Firefox3/8/20224205
css.selectors.backdrop.dialog Chrome1/14/2014 Firefox3/8/20222975
html.elements.dialog πŸ“‹Chrome8/26/2014 Firefox3/8/20222751
html.elements.dialog.open Chrome8/26/2014 Firefox3/8/20222751
api.CSSImportRule.layerName πŸ“‹Firefox2/8/2022 Chrome3/1/202221
api.CSSLayerBlockRule πŸ“‹Firefox2/8/2022 Chrome3/1/202221
api.CSSLayerBlockRule.name πŸ“‹Firefox2/8/2022 Chrome3/1/202221
api.CSSLayerStatementRule πŸ“‹Firefox2/8/2022 Chrome3/1/202221
api.CSSLayerStatementRule.nameList πŸ“‹Firefox2/8/2022 Chrome3/1/202221
api.HTMLCanvasElement.getContext.2d_context.options_willReadFrequently_parameter πŸ“‹Firefox3/18/2014 Chrome3/1/20222905
css.at-rules.import.layer πŸ“‹Firefox2/8/2022 Chrome3/1/202221
css.at-rules.layer πŸ“‹Firefox2/8/2022 Chrome3/1/202221
css.properties.text-emphasis πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-color πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-position πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.circle πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.dot πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.double-circle πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.filled πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.none πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.open πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.sesame πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.properties.text-emphasis-style.triangle πŸ“‹Firefox4/26/2016 Chrome3/1/20222135
css.types.global_keywords.revert-layer πŸ“‹Firefox2/8/2022 Chrome3/1/202221
javascript.builtins.Intl.supportedValuesOf πŸ“‹Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_calendar Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_collation Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_currency Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_numberingSystem Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_timeZone Firefox10/5/2021 Chrome3/1/2022147
javascript.builtins.Intl.supportedValuesOf.key_parameter_unit Firefox10/5/2021 Chrome3/1/2022147

2022/2

API First Browser Date Last Browser Date Days Notes
api.AbortController.abort.reason_parameter πŸ“‹Chrome2/1/2022 Firefox2/8/20227
api.AbortSignal.abort_static.reason_parameter πŸ“‹Chrome2/1/2022 Firefox2/8/20227
api.AbortSignal.reason πŸ“‹Chrome2/1/2022 Firefox2/8/20227
api.ImageBitmapRenderingContext.canvas πŸ“‹Chrome4/17/2018 Firefox2/8/20221393
css.properties.d πŸ“‹Chrome7/20/2016 Firefox2/8/20222029
Safari: The property parses, but has no effect.Safari on iOS: The property parses, but has no effect.WebView on iOS: The property parses, but has no effect.
css.properties.d.none πŸ“‹Chrome7/20/2016 Firefox2/8/20222029
css.properties.scrollbar-gutter πŸ“‹Chrome9/21/2021 Firefox2/8/2022140
css.properties.scrollbar-gutter.auto πŸ“‹Chrome9/21/2021 Firefox2/8/2022140
css.properties.scrollbar-gutter.stable πŸ“‹Chrome9/21/2021 Firefox2/8/2022140
css.types.basic-shape.path.d πŸ“‹Chrome7/20/2016 Firefox2/8/20222029
api.BarProp.visible.returns_popup Firefox1/11/2022 Chrome2/1/202221
api.Window.open.features_parameter_popup Firefox1/11/2022 Chrome2/1/202221
api.structuredClone πŸ“‹Firefox11/2/2021 Chrome2/1/202291
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.properties.color-scheme.only Firefox1/11/2022 Chrome2/1/202221

2022/1

API First Browser Date Last Browser Date Days Notes
api.HTMLCanvasElement.toBlob.type_parameter_webp Chrome4/13/2016 Firefox1/11/20222099
api.HTMLCanvasElement.toDataURL.type_parameter_webp Chrome2/8/2012 Firefox1/11/20223625
api.Lock πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.Lock.mode πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.Lock.name πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.LockManager πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.LockManager.query πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.LockManager.request πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.Navigator.canShare.data_text_parameter πŸ“‹Chrome3/2/2021 Firefox1/11/2022315
api.Navigator.locks πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
api.PushSubscription.expirationTime πŸ“‹Chrome7/25/2017 Firefox1/11/20221631
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.RTCStatsReport.type_inbound-rtp.packetsDiscarded πŸ“‹Chrome9/21/2021 Firefox1/11/2022112
api.RTCStatsReport.type_remote-inbound-rtp.roundTripTime πŸ“‹Chrome2/4/2020 Firefox1/11/2022707
api.WorkerNavigator.locks πŸ“‹Chrome9/4/2018 Firefox1/11/20221225
css.properties.color-scheme πŸ“‹Chrome4/7/2020 Firefox1/11/2022644
css.properties.color-scheme.dark Chrome4/7/2020 Firefox1/11/2022644
css.properties.color-scheme.light Chrome4/7/2020 Firefox1/11/2022644
css.properties.color-scheme.normal Chrome4/7/2020 Firefox1/11/2022644
html.elements.meta.name.color-scheme πŸ“‹Chrome4/7/2020 Firefox1/11/2022644
api.PermissionStatus.name πŸ“‹Firefox10/5/2021 Chrome1/4/202291
css.properties.font-synthesis πŸ“‹Firefox12/1/2014 Chrome1/4/20222591
css.properties.font-synthesis.none πŸ“‹Firefox12/1/2014 Chrome1/4/20222591
css.properties.font-synthesis.small-caps Firefox10/5/2021 Chrome1/4/202291
css.properties.font-synthesis.style Firefox12/1/2014 Chrome1/4/20222591
css.properties.font-synthesis.weight Firefox12/1/2014 Chrome1/4/20222591
css.types.transform-function.perspective.none πŸ“‹Firefox10/5/2021 Chrome1/4/202291

2021/12

API First Browser Date Last Browser Date Days Notes
api.Crypto.randomUUID πŸ“‹Chrome7/20/2021 Firefox12/7/2021140
Node.js: Since 14.17.0 and 15.6.0, a similar method is available via the crypto module.
api.HTMLElement.inputMode πŸ“‹Chrome4/17/2018 Firefox12/7/20211330
css.at-rules.page.size πŸ“‹Chrome10/25/2011 Firefox12/7/20213696
css.at-rules.page.size.jis-b4 πŸ“‹Chrome5/19/2020 Firefox12/7/2021567
css.at-rules.page.size.jis-b5 πŸ“‹Chrome5/19/2020 Firefox12/7/2021567
html.global_attributes.inputmode πŸ“‹Chrome4/17/2018 Firefox12/7/20211330
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.HTMLScriptElement.supports_static πŸ“‹Firefox11/2/2021 Chrome11/15/202113
webassembly.reference-types πŸ“‹Firefox7/28/2020 Chrome11/15/2021475
api.Element.attachShadow.options_delegatesFocus_parameter πŸ“‹Chrome8/31/2016 Firefox11/2/20211889
api.HTMLElement.enterKeyHint πŸ“‹Chrome9/10/2019 Firefox11/2/2021784
api.ShadowRoot.delegatesFocus πŸ“‹Chrome8/31/2016 Firefox11/2/20211889
css.properties.block-size.fit-content πŸ“‹Chrome3/9/2017 Firefox11/2/20211699
css.properties.flex.fit-content πŸ“‹Chrome9/21/2021 Firefox11/2/202142
css.properties.flex-basis.fit-content Chrome9/21/2021 Firefox11/2/202142
css.properties.height.fit-content πŸ“‹Chrome10/13/2015 Firefox11/2/20212212
css.properties.inline-size.fit-content πŸ“‹Chrome3/9/2017 Firefox11/2/20211699
css.properties.max-block-size.fit-content Chrome3/9/2017 Firefox11/2/20211699
css.properties.max-height.fit-content πŸ“‹Chrome10/13/2015 Firefox11/2/20212212
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 Chrome3/9/2017 Firefox11/2/20211699
css.properties.max-width.fit-content πŸ“‹Chrome10/13/2015 Firefox11/2/20212212
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 Chrome3/9/2017 Firefox11/2/20211699
css.properties.min-height.fit-content Chrome10/13/2015 Firefox11/2/20212212
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 Chrome3/9/2017 Firefox11/2/20211699
css.properties.min-width.fit-content Chrome10/13/2015 Firefox11/2/20212212
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“‹Chrome10/13/2015 Firefox11/2/20212212
html.global_attributes.enterkeyhint πŸ“‹Chrome9/10/2019 Firefox11/2/2021784

2021/10

API First Browser Date Last Browser Date Days Notes
api.reportError πŸ“‹Firefox10/5/2021 Chrome10/19/202114
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter.extended_values Firefox8/10/2021 Chrome10/19/202170
api.Document.securitypolicyviolation_event πŸ“‹Chrome7/30/2019 Firefox10/5/2021798
api.ElementInternals πŸ“‹Chrome9/10/2019 Firefox10/5/2021756
api.ElementInternals.shadowRoot πŸ“‹Chrome1/19/2021 Firefox10/5/2021259
api.HTMLElement.attachInternals πŸ“‹Chrome9/10/2019 Firefox10/5/2021756
api.ResizeObserverEntry.devicePixelContentBoxSize πŸ“‹Chrome7/27/2020 Firefox10/5/2021435
api.SVGAnimationElement.beginEvent_event πŸ“‹Chrome5/20/2014 Firefox10/5/20212695
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.endEvent_event πŸ“‹Chrome5/20/2014 Firefox10/5/20212695
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.SVGAnimationElement.repeatEvent_event πŸ“‹Chrome5/20/2014 Firefox10/5/20212695
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.createImageBitmap.options_imageOrientation_parameter Chrome7/20/2016 Firefox10/5/20211903
api.createImageBitmap.options_premultiplyAlpha_parameter Chrome7/20/2016 Firefox10/5/20211903
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.properties.image-rendering.pixelated πŸ“‹Chrome3/3/2015 Firefox10/5/20212408
html.elements.input.type_datetime-local πŸ“‹Chrome6/26/2012 Firefox10/5/20213388
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.
javascript.classes.static.initialization_blocks πŸ“‹Chrome9/21/2021 Firefox10/5/202114

2021/9

API First Browser Date Last Browser Date Days Notes
css.properties.flex.content πŸ“‹Firefox6/26/2018 Chrome9/21/20211183
css.properties.flex.max-content πŸ“‹Firefox3/19/2019 Chrome9/21/2021917
css.properties.flex.min-content πŸ“‹Firefox3/19/2019 Chrome9/21/2021917
css.properties.flex-basis.content Firefox6/26/2018 Chrome9/21/20211183
css.properties.flex-basis.max-content Firefox3/19/2019 Chrome9/21/2021917
css.properties.flex-basis.min-content Firefox3/19/2019 Chrome9/21/2021917
css.properties.outline πŸ“‹Firefox4/19/2021 Chrome9/21/2021155
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.
html.elements.iframe.allow.display-capture πŸ“‹Firefox3/10/2020 Chrome9/21/2021560
api.CustomElementRegistry.define.disabledFeatures_static_property Chrome9/10/2019 Firefox9/7/2021728
api.HTMLSlotElement.assign πŸ“‹Chrome7/20/2021 Firefox9/7/202149
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.ResizeObserverEntry.borderBoxSize πŸ“‹Chrome7/27/2020 Firefox9/7/2021407
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“‹Chrome7/27/2020 Firefox9/7/2021407
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.ShadowRoot.slotAssignment πŸ“‹Chrome10/20/2020 Firefox9/7/2021322
css.at-rules.font-face.size-adjust πŸ“‹Chrome7/20/2021 Firefox9/7/202149
css.properties.accent-color πŸ“‹Chrome8/31/2021 Firefox9/7/20217
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 Chrome8/31/2021 Firefox9/7/20217
css.properties.break-inside.avoid-column Chrome4/13/2016 Firefox9/7/20211973
css.properties.break-inside.avoid-page Chrome4/13/2016 Firefox9/7/20211973
css.properties.break-inside.multicol_context.avoid-column Chrome4/13/2016 Firefox9/7/20211973
css.properties.break-inside.paged_context.avoid-page Chrome5/25/2016 Firefox9/7/20211931
css.properties.font-family.system-ui Chrome1/25/2017 Firefox9/7/20211686
Firefox: Supported on macOS only.
javascript.builtins.Object.hasOwn πŸ“‹Chrome8/31/2021 Firefox9/7/20217

2021/8

API First Browser Date Last Browser Date Days Notes
api.AbortSignal.abort_static πŸ“‹Firefox4/19/2021 Chrome8/31/2021134
api.EXT_texture_compression_bptc πŸ“‹Firefox7/9/2019 Chrome8/31/2021784
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
api.EXT_texture_compression_rgtc πŸ“‹Firefox1/29/2019 Chrome8/31/2021945
Chrome: Only supported on macOS.Edge: Only supported on macOS.Firefox: Only supported on macOS.Opera: Only supported on macOS.
api.OVR_multiview2 πŸ“‹Firefox12/10/2019 Chrome8/31/2021630
Chrome: Only supported on Windows with ANGLE.Edge: Only supported on Windows with ANGLE.Firefox: Only supported on Windows with ANGLE.Firefox for Android: Only supported on Windows with ANGLE.Opera: Only supported on Windows with ANGLE.
api.OVR_multiview2.framebufferTextureMultiviewOVR πŸ“‹Firefox12/10/2019 Chrome8/31/2021630
api.RTCStatsReport.type_outbound-rtp.nackCount πŸ“‹Firefox8/8/2017 Chrome8/31/20211484
css.properties.align-content.flex_context.start_end Firefox3/8/2016 Chrome8/31/20212002
Opera: Before version 79, this value is recognized, but has no effect.Opera Android: This value is recognized, but has no effect.
css.properties.align-items.flex_context.start_end Firefox3/8/2016 Chrome8/31/20212002
css.properties.align-self.flex_context.start_end Firefox3/8/2016 Chrome8/31/20212002
Opera: Before version 79, this value is recognized, but has no effect.
css.properties.justify-content.flex_context.left_right Firefox3/7/2017 Chrome8/31/20211638
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.start_end Firefox3/8/2016 Chrome8/31/20212002
javascript.builtins.Error.Error.options_cause_parameter πŸ“‹Firefox8/10/2021 Chrome8/31/202121
javascript.builtins.Error.cause πŸ“‹Firefox8/10/2021 Chrome8/31/202121
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.
api.Gamepad.secure_context_required Chrome10/20/2020 Firefox8/10/2021294
api.GamepadButton.secure_context_required Chrome10/20/2020 Firefox8/10/2021294
api.GamepadEvent.secure_context_required Chrome10/20/2020 Firefox8/10/2021294
api.GamepadHapticActuator.secure_context_required Chrome10/20/2020 Firefox8/10/2021294
api.Navigator.getGamepads.secure_context_required Chrome10/20/2020 Firefox8/10/2021294
api.VisualViewport πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.height πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.offsetLeft πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.offsetTop πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.pageLeft πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.pageTop πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.resize_event πŸ“‹Chrome10/17/2017 Firefox8/10/20211393
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“‹Chrome9/5/2017 Firefox8/10/20211435
api.VisualViewport.scroll_event πŸ“‹Chrome10/17/2017 Firefox8/10/20211393
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“‹Chrome9/5/2017 Firefox8/10/20211435
api.Window.visualViewport πŸ“‹Chrome9/5/2017 Firefox8/10/20211435
css.properties.tab-size πŸ“‹Chrome7/31/2012 Firefox8/10/20213297
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“‹Chrome7/30/2019 Firefox8/10/2021742
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“‹Chrome7/30/2019 Firefox8/10/2021742
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.Navigator.registerProtocolHandler.scheme_parameter_matrix Firefox7/13/2021 Chrome7/20/20217
http.mixed-content.block_mixed_downloads πŸ“‹Firefox7/13/2021 Chrome7/20/20217
javascript.builtins.Array.at πŸ“‹Firefox7/13/2021 Chrome7/20/20217
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dayPeriod_parameter Firefox7/13/2021 Chrome7/20/20217
javascript.builtins.String.at πŸ“‹Firefox7/13/2021 Chrome7/20/20217
javascript.builtins.TypedArray.at πŸ“‹Firefox7/13/2021 Chrome7/20/20217
api.WheelEvent.wheelDelta Chrome12/11/2008 Firefox7/13/20214597
api.WheelEvent.wheelDeltaX Chrome12/11/2008 Firefox7/13/20214597
api.WheelEvent.wheelDeltaY Chrome12/11/2008 Firefox7/13/20214597
css.properties.scroll-margin πŸ“‹Chrome9/4/2018 Firefox7/13/20211043
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.
http.headers.Sec-Fetch-Dest πŸ“‹Chrome2/4/2020 Firefox7/13/2021525
http.headers.Sec-Fetch-Mode πŸ“‹Chrome7/30/2019 Firefox7/13/2021714
http.headers.Sec-Fetch-Site πŸ“‹Chrome7/30/2019 Firefox7/13/2021714
http.headers.Sec-Fetch-User πŸ“‹Chrome7/30/2019 Firefox7/13/2021714
javascript.classes.private_class_fields πŸ“‹Chrome4/23/2019 Firefox7/13/2021812
javascript.classes.private_class_fields_in πŸ“‹Chrome5/25/2021 Firefox7/13/202149
javascript.classes.private_class_methods πŸ“‹Chrome7/27/2020 Firefox7/13/2021351

2021/6

API First Browser Date Last Browser Date Days Notes
api.EventCounts πŸ“‹Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.@@iterator Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.entries Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.forEach Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.get Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.has Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.keys Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.size Chrome8/25/2020 Firefox6/1/2021280
api.EventCounts.values Chrome8/25/2020 Firefox6/1/2021280
api.FontFace.ascentOverride πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
api.FontFace.descentOverride πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
api.FontFace.lineGapOverride πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
api.Performance.eventCounts πŸ“‹Chrome8/25/2020 Firefox6/1/2021280
api.PerformanceEventTiming πŸ“‹Chrome7/30/2019 Firefox6/1/2021672
api.PerformanceEventTiming.cancelable πŸ“‹Chrome7/30/2019 Firefox6/1/2021672
api.PerformanceEventTiming.processingEnd πŸ“‹Chrome7/30/2019 Firefox6/1/2021672
api.PerformanceEventTiming.processingStart πŸ“‹Chrome7/30/2019 Firefox6/1/2021672
api.PerformanceEventTiming.target πŸ“‹Chrome8/25/2020 Firefox6/1/2021280
api.PerformanceEventTiming.toJSON πŸ“‹Chrome7/30/2019 Firefox6/1/2021672
api.PointerEvent.getPredictedEvents πŸ“‹Chrome9/10/2019 Firefox6/1/2021630
css.at-rules.font-face.ascent-override πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
css.at-rules.font-face.descent-override πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
css.at-rules.font-face.line-gap-override πŸ“‹Chrome11/17/2020 Firefox6/1/2021196
css.at-rules.media.forced-colors πŸ“‹Chrome3/2/2021 Firefox6/1/202191
css.properties.aspect-ratio πŸ“‹Chrome1/19/2021 Firefox6/1/2021133
css.properties.aspect-ratio.auto πŸ“‹Chrome1/19/2021 Firefox6/1/2021133
javascript.operators.await.top_level πŸ“‹Chrome3/2/2021 Firefox6/1/202191
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.fixed-width-SIMD πŸ“‹Chrome5/25/2021 Firefox6/1/20217

2021/5

API First Browser Date Last Browser Date Days Notes
api.CSSCounterStyleRule πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.additiveSymbols πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.fallback πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.name πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.negative πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.pad πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.prefix πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.range πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.speakAs πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.suffix πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.symbols πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.CSSCounterStyleRule.system πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
api.RTCStatsReport.type_inbound-rtp.remoteId πŸ“‹Firefox7/9/2019 Chrome5/25/2021686
api.RTCStatsReport.type_local-candidate.address πŸ“‹Firefox1/29/2019 Chrome5/25/2021847
api.RTCStatsReport.type_remote-candidate.address πŸ“‹Firefox1/29/2019 Chrome5/25/2021847
api.RTCStatsReport.type_remote-outbound-rtp πŸ“‹Firefox2/4/2014 Chrome5/25/20212667
api.RTCStatsReport.type_remote-outbound-rtp.bytesSent πŸ“‹Firefox1/7/2020 Chrome5/25/2021504
api.RTCStatsReport.type_remote-outbound-rtp.id πŸ“‹Firefox1/7/2020 Chrome5/25/2021504
api.RTCStatsReport.type_remote-outbound-rtp.kind πŸ“‹Firefox10/23/2018 Chrome5/25/2021945
api.RTCStatsReport.type_remote-outbound-rtp.localId πŸ“‹Firefox7/9/2019 Chrome5/25/2021686
api.RTCStatsReport.type_remote-outbound-rtp.packetsSent πŸ“‹Firefox1/7/2020 Chrome5/25/2021504
api.RTCStatsReport.type_remote-outbound-rtp.remoteTimestamp πŸ“‹Firefox7/28/2020 Chrome5/25/2021301
api.RTCStatsReport.type_remote-outbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Chrome5/25/20212667
api.RTCStatsReport.type_remote-outbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Chrome5/25/2021504
api.RTCStatsReport.type_remote-outbound-rtp.type πŸ“‹Firefox1/7/2020 Chrome5/25/2021504
css.at-rules.counter-style πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.additive-symbols πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.fallback πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.negative πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.pad πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.prefix πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.range πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.speak-as πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.suffix πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
css.at-rules.counter-style.symbols πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
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 Chrome5/25/20212415
css.properties.list-style-type.cjk-decimal πŸ“‹Firefox3/18/2014 Chrome5/25/20212625
css.properties.list-style-type.ethiopic-numeric πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
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 Chrome5/25/20212625
css.properties.list-style-type.japanese-informal πŸ“‹Firefox3/18/2014 Chrome5/25/20212625
css.properties.list-style-type.tamil πŸ“‹Firefox10/14/2014 Chrome5/25/20212415
http.headers.Set-Cookie.SameSite.schemeful Firefox7/28/2020 Chrome5/25/2021301
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.IntlLegacyConstructedSymbol πŸ“‹Firefox6/13/2017 Chrome5/25/20211442
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.IntlLegacyConstructedSymbol πŸ“‹Firefox6/13/2017 Chrome5/25/20211442
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.

2021/4

API First Browser Date Last Browser Date Days Notes
javascript.builtins.RegExp.hasIndices πŸ“‹Chrome4/13/2021 Firefox4/19/20216
api.AbstractRange πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.AbstractRange.collapsed πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.AbstractRange.endContainer πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.AbstractRange.endOffset πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.AbstractRange.startContainer πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.AbstractRange.startOffset πŸ“‹Firefox9/3/2019 Chrome4/13/2021588
api.EventTarget.addEventListener.options_parameter.options_signal_parameter πŸ“‹Firefox2/23/2021 Chrome4/13/202149
api.StaticRange.StaticRange πŸ“‹Firefox12/10/2019 Chrome4/13/2021490
css.properties.overflow.clip πŸ“‹Firefox9/22/2020 Chrome4/13/2021203
css.properties.overflow-x.clip πŸ“‹Firefox9/22/2020 Chrome4/13/2021203
css.properties.overflow-y.clip πŸ“‹Firefox9/22/2020 Chrome4/13/2021203
css.types.overflow.clip Firefox9/22/2020 Chrome4/13/2021203

2021/3

API First Browser Date Last Browser Date Days Notes
api.Element.beforeinput_event πŸ“‹Chrome7/25/2017 Firefox3/23/20211337
api.InputEvent.getTargetRanges πŸ“‹Chrome7/25/2017 Firefox3/23/20211337
api.MediaSource.sourceclose_event πŸ“‹Chrome8/31/2016 Firefox3/23/20211665
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.
css.selectors.any-link.not_match_link Chrome3/6/2018 Firefox3/23/20211113
css.selectors.link.not_match_link Chrome12/11/2008 Firefox3/23/20214485
css.selectors.visited.not_match_link Chrome12/11/2008 Firefox3/23/20214485
http.headers.Content-Length.cors_response_safelist Chrome7/30/2019 Firefox3/23/2021602
http.headers.Referrer-Policy.default_strict-origin-when-cross-origin Chrome8/25/2020 Firefox3/23/2021210
javascript.statements.export.arbitrary_module_namespace_identifier_names Chrome1/19/2021 Firefox3/23/202163
javascript.statements.import.arbitrary_module_namespace_identifier_names Chrome1/19/2021 Firefox3/23/202163
api.Navigator.share.data_text_parameter πŸ“‹Firefox12/10/2019 Chrome3/2/2021448
css.properties.border-end-end-radius πŸ“‹Firefox3/19/2019 Chrome3/2/2021714
css.properties.border-end-start-radius πŸ“‹Firefox3/19/2019 Chrome3/2/2021714
css.properties.border-start-end-radius πŸ“‹Firefox3/19/2019 Chrome3/2/2021714
css.properties.border-start-start-radius πŸ“‹Firefox3/19/2019 Chrome3/2/2021714
css.properties.filter.svg_elements Firefox1/13/2015 Chrome3/2/20212240
css.properties.list-style-type.disclosure-closed πŸ“‹Firefox10/14/2014 Chrome3/2/20212331
css.properties.list-style-type.disclosure-open πŸ“‹Firefox10/14/2014 Chrome3/2/20212331
css.properties.text-decoration-thickness πŸ“‹Firefox10/22/2019 Chrome3/2/2021497
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.selectors.file-selector-button πŸ“‹Firefox10/20/2020 Chrome3/2/2021133
html.elements.summary.display_list_item Firefox9/20/2016 Chrome3/2/20211624

2021/2

API First Browser Date Last Browser Date Days Notes
javascript.builtins.Intl.DisplayNames πŸ“‹Chrome4/7/2020 Firefox2/23/2021322
javascript.builtins.Intl.DisplayNames.DisplayNames πŸ“‹Chrome4/7/2020 Firefox2/23/2021322
javascript.builtins.Intl.DisplayNames.of πŸ“‹Chrome4/7/2020 Firefox2/23/2021322
javascript.builtins.Intl.DisplayNames.resolvedOptions πŸ“‹Chrome4/7/2020 Firefox2/23/2021322
javascript.builtins.Intl.DisplayNames.supportedLocalesOf πŸ“‹Chrome4/7/2020 Firefox2/23/2021322

2021/1

API First Browser Date Last Browser Date Days Notes
css.properties.touch-action.pinch-zoom Chrome1/25/2017 Firefox1/26/20211462
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.
css.selectors.focus-visible πŸ“‹Chrome10/20/2020 Firefox1/26/202198
html.elements.link.rel.preload πŸ“‹Chrome4/13/2016 Firefox1/26/20211749
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 Chrome4/13/2016 Firefox1/26/20211749
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 Chrome4/13/2016 Firefox1/26/20211749
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 Chrome4/13/2016 Firefox1/26/20211749
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 Chrome4/13/2016 Firefox1/26/20211749
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 Chrome4/13/2016 Firefox1/26/20211749
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).
javascript.builtins.Intl.Collator.Collator.options_collation_parameter Chrome10/20/2020 Firefox1/26/202198
api.RTCRtpTransceiver.stop πŸ“‹Firefox3/13/2018 Chrome1/19/20211043
css.properties.clip-path.path Firefox12/10/2019 Chrome1/19/2021406
css.properties.hyphens.auto Firefox8/16/2011 Chrome1/19/20213444
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.properties.hyphens.manual Firefox8/16/2011 Chrome1/19/20213444
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.properties.hyphens.none Firefox8/16/2011 Chrome1/19/20213444
Chrome: Only supported on macOS.Edge: Only supported on macOS.Opera: Only supported on macOS.
css.selectors.is πŸ“‹Firefox6/30/2020 Chrome1/19/2021203
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.is.forgiving_selector_list Firefox10/20/2020 Chrome1/19/202191
css.selectors.not.selector_list Firefox12/15/2020 Chrome1/19/202135
css.selectors.where πŸ“‹Firefox6/30/2020 Chrome1/19/2021203
css.selectors.where.forgiving_selector_list Firefox10/20/2020 Chrome1/19/202191
css.types.basic-shape.path.clip-path πŸ“‹Firefox1/7/2020 Chrome1/19/2021378
html.elements.a.implicit_noopener Firefox7/28/2020 Chrome1/19/2021175
html.elements.area.implicit_noopener Firefox7/28/2020 Chrome1/19/2021175

2020/12

API First Browser Date Last Browser Date Days Notes
api.EventTarget.addEventListener.options_parameter.options_passive_parameter_default_true_wheel Chrome3/12/2019 Firefox12/15/2020644
api.FetchEvent.handled πŸ“‹Chrome10/20/2020 Firefox12/15/202056
api.PerformancePaintTiming πŸ“‹Chrome7/25/2017 Firefox12/15/20201239
api.PerformancePaintTiming.first-contentful-paint πŸ“‹Chrome7/25/2017 Firefox12/15/20201239
api.PerformancePaintTiming.toJSON πŸ“‹Chrome7/25/2017 Firefox12/15/20201239
http.mixed-content.allow_localhost_url πŸ“‹Chrome12/10/2019 Firefox12/15/2020371
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_fractionalSecondDigits_parameter Chrome7/27/2020 Firefox12/15/2020141

2020/11

API First Browser Date Last Browser Date Days Notes
api.Element.transitioncancel_event πŸ“‹Firefox4/19/2017 Chrome11/17/20201308
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.crossOriginIsolated πŸ“‹Firefox1/7/2020 Chrome11/17/2020315
css.properties.border-block πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.currentColor πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.dashed πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.dotted πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.double πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.groove πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.hidden πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.inset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.medium πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.none πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.outset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.ridge πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.solid πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.thick πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.thin πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block.transparent πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-color πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-color.currentColor πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-color.transparent πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.dashed πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.dotted πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.double πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.groove πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.hidden πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.inset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.none πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.outset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.ridge πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-style.solid πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-width πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-width.medium πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-width.thick πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-block-width.thin πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.currentColor πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.dashed πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.dotted πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.double πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.groove πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.hidden πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.inset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.medium πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.none πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.outset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.ridge πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.solid πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.thick πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.thin πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline.transparent πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-color πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-color.currentColor πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-color.transparent πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.dashed πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.dotted πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.double πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.groove πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.hidden πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.inset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.none πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.outset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.ridge πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-style.solid πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-width πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-width.medium πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-width.thick πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.border-inline-width.thin πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.hyphens.language_bulgarian Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_croatian Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_danish Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_estonian Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_french Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_german_reformed_orthography Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_german_swiss_orthography Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_german_traditional_orthography Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_hungarian Firefox12/20/2011 Chrome11/17/20203255
css.properties.hyphens.language_latin Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_norwegian_nn Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_norwegian_no Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_portuguese Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_slovenian Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_spanish Firefox11/8/2011 Chrome11/17/20203297
css.properties.hyphens.language_welsh Firefox11/8/2011 Chrome11/17/20203297
css.properties.inset πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.inset.auto πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.inset-block πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-block.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.inset-block-end πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-block-end.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.inset-block-start πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-block-start.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.inset-inline πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-inline.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.inset-inline-end πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-inline-end.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.inset-inline-start πŸ“‹Firefox10/23/2018 Chrome11/17/2020756
css.properties.inset-inline-start.auto πŸ“‹Firefox9/22/2015 Chrome11/17/20201883
css.properties.margin-block πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.margin-block.auto πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.margin-inline πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.margin-inline.auto πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.padding-block πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.padding-inline πŸ“‹Firefox3/19/2019 Chrome11/17/2020609
css.properties.quotes.auto πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
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.text-decoration.auto πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-decoration.from-font πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-decoration.includes_thickness Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-decoration-thickness.auto πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-decoration-thickness.from-font πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-decoration-thickness.percentage Firefox3/10/2020 Chrome11/17/2020252
css.properties.text-underline-offset πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-underline-offset.auto πŸ“‹Firefox10/22/2019 Chrome11/17/2020392
css.properties.text-underline-offset.percentage πŸ“‹Firefox3/10/2020 Chrome11/17/2020252
css.properties.text-underline-position.from-font πŸ“‹Firefox3/10/2020 Chrome11/17/2020252
css.types.gradient.conic-gradient πŸ“‹Chrome9/4/2018 Firefox11/17/2020805
css.types.gradient.conic-gradient.doubleposition Chrome1/29/2019 Firefox11/17/2020658
css.types.gradient.repeating-conic-gradient πŸ“‹Chrome9/4/2018 Firefox11/17/2020805

2020/10

API First Browser Date Last Browser Date Days Notes
api.Document.replaceChildren πŸ“‹Firefox6/30/2020 Chrome10/20/2020112
api.DocumentFragment.replaceChildren πŸ“‹Firefox6/30/2020 Chrome10/20/2020112
api.Element.replaceChildren πŸ“‹Firefox6/30/2020 Chrome10/20/2020112
api.Element.scrollLeft πŸ“‹Firefox11/9/2004 Chrome10/20/20205824
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.MediaMetadata πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaMetadata.MediaMetadata πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
api.MediaMetadata.album πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
api.MediaMetadata.artist πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
api.MediaMetadata.artwork πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
api.MediaMetadata.title πŸ“‹Chrome3/9/2017 Firefox10/20/20201321
api.MediaSession πŸ“‹Chrome3/12/2019 Firefox10/20/2020588
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.metadata πŸ“‹Chrome3/12/2019 Firefox10/20/2020588
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.playbackState πŸ“‹Chrome3/12/2019 Firefox10/20/2020588
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.setActionHandler πŸ“‹Chrome3/12/2019 Firefox10/20/2020588
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.MediaSession.setActionHandler.nexttrack_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.pause_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.play_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.previoustrack_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.seekbackward_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.seekforward_type Chrome3/12/2019 Firefox10/20/2020588
api.MediaSession.setActionHandler.seekto_type Chrome10/22/2019 Firefox10/20/2020364
api.MediaSession.setActionHandler.stop_type Chrome9/10/2019 Firefox10/20/2020406
api.MediaSession.setPositionState πŸ“‹Chrome4/7/2020 Firefox10/20/2020196
Firefox for Android: Firefox exposes the API, but does not provide a corresponding user-facing media control interface.
api.Navigator.mediaSession πŸ“‹Chrome3/12/2019 Firefox10/20/2020588
api.RTCDtlsTransport πŸ“‹Chrome1/29/2019 Firefox10/20/2020630
api.RTCDtlsTransport.state πŸ“‹Chrome1/29/2019 Firefox10/20/2020630
api.RTCDtlsTransport.statechange_event Chrome1/29/2019 Firefox10/20/2020630
api.RTCRtpReceiver.transport πŸ“‹Chrome6/5/2017 Firefox10/20/20201233
api.RTCRtpSender.transport πŸ“‹Chrome6/4/2019 Firefox10/20/2020504
css.selectors.marker πŸ“‹Firefox7/9/2019 Chrome10/20/2020469
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.
css.selectors.marker.animation_and_transition_support Firefox8/25/2020 Chrome10/20/202056
html.elements.iframe.allow.web-share πŸ“‹Firefox9/22/2020 Chrome10/20/202028
Firefox: Firefox recognizes the web-share permissions policy, but this has no effect in versions of Firefox that do not support the share() method.Firefox for Android: Firefox for Android recognizes the web-share permissions policy, but this has no effect in versions of Firefox for Android that do not support the share() method.
html.elements.iframe.sandbox.allow-downloads πŸ“‹Chrome5/19/2020 Firefox10/20/2020154
webassembly.multi-value πŸ“‹Firefox6/30/2020 Chrome10/20/2020112

2020/9

API First Browser Date Last Browser Date Days Notes
css.properties.flex-direction.column-reverse πŸ“‹Chrome7/31/2012 Firefox9/22/20202975
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“‹Chrome7/31/2012 Firefox9/22/20202975
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.

2020/8

API First Browser Date Last Browser Date Days Notes
api.Element.animate.options_composite_parameter πŸ“‹Chrome7/27/2020 Firefox8/25/202029
api.KeyframeEffect.composite πŸ“‹Chrome7/27/2020 Firefox8/25/202029
api.RTCStatsReport.type_data-channel.dataChannelIdentifier πŸ“‹Firefox7/28/2020 Chrome8/25/202028
css.properties.appearance πŸ“‹Chrome7/27/2020 Firefox8/25/202029
css.properties.appearance.auto πŸ“‹Chrome5/19/2020 Firefox8/25/202098
css.properties.appearance.menulist-button πŸ“‹Chrome12/11/2008 Firefox8/25/20204275
Firefox: See bug 1481615.Firefox for Android: See bug 1481615.
css.properties.counter-set πŸ“‹Firefox7/9/2019 Chrome8/25/2020413
css.properties.counter-set.list-item πŸ“‹Firefox7/9/2019 Chrome8/25/2020413
css.properties.counter-set.none πŸ“‹Firefox7/9/2019 Chrome8/25/2020413
html.elements.iframe.allow.fullscreen πŸ“‹Chrome10/17/2017 Firefox8/25/20201043
javascript.builtins.AggregateError πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.builtins.AggregateError.AggregateError πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.builtins.AggregateError.errors πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.builtins.Promise.any πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.builtins.String.replaceAll πŸ“‹Firefox6/2/2020 Chrome8/25/202084
javascript.operators.logical_and_assignment πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.operators.logical_or_assignment πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.operators.nullish_coalescing_assignment πŸ“‹Firefox7/28/2020 Chrome8/25/202028
javascript.statements.export.namespace πŸ“‹Chrome1/29/2019 Firefox8/25/2020574
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.
webassembly.BigInt-to-i64-integration πŸ“‹Firefox6/30/2020 Chrome8/25/202056

2020/7

API First Browser Date Last Browser Date Days Notes
api.CanvasPattern.setTransform.dommatrix Chrome7/24/2018 Firefox7/28/2020735
api.FileReader.loadstart_event πŸ“‹Chrome9/2/2010 Firefox7/28/20203617
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“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.bytesReceived πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.bytesSent πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.id πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.label πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.messagesReceived πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.messagesSent πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.protocol πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.state πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.timestamp πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.RTCStatsReport.type_data-channel.type πŸ“‹Chrome2/4/2020 Firefox7/28/2020175
api.WebGL2RenderingContext.bufferData.srcData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.bufferSubData.srcData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.clearBufferfv.values_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.clearBufferiv.values_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.clearBufferuiv.values_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.compressedTexImage2D.pixels_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.compressedTexImage3D.pixels_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.compressedTexSubImage2D.srcData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.getBufferSubData.dstData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.readPixels.pixels_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.texImage3D.srcData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.texSubImage3D.srcData_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix2fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix2x3fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix2x4fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix3fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix3x2fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix3x4fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix4fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix4x2fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.uniformMatrix4x3fv.data_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttrib1fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttrib2fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttrib3fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttrib4fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttribI4iv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGL2RenderingContext.vertexAttribI4uiv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGLRenderingContext.compressedTexImage2D.pixels_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGLRenderingContext.vertexAttrib1fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGLRenderingContext.vertexAttrib2fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGLRenderingContext.vertexAttrib3fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
api.WebGLRenderingContext.vertexAttrib4fv.value_param_accepts_SharedArrayBuffer Chrome7/25/2017 Firefox7/28/20201099
html.elements.iframe.sandbox.allow-top-navigation-by-user-activation πŸ“‹Chrome4/19/2017 Firefox7/28/20201196
http.headers.Cross-Origin-Embedder-Policy πŸ“‹Chrome5/19/2020 Firefox7/28/202070
http.headers.Cross-Origin-Opener-Policy πŸ“‹Chrome5/19/2020 Firefox7/28/202070
javascript.builtins.DataView.DataView.sharedarraybuffer_support Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.FinalizationRegistry πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.FinalizationRegistry.FinalizationRegistry πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.FinalizationRegistry.register πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.FinalizationRegistry.unregister πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_dateStyle_parameter Chrome7/30/2019 Firefox7/28/2020364
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeStyle_parameter Chrome7/30/2019 Firefox7/28/2020364
javascript.builtins.SharedArrayBuffer πŸ“‹Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.SharedArrayBuffer.@@species πŸ“‹Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.SharedArrayBuffer.SharedArrayBuffer πŸ“‹Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.SharedArrayBuffer.byteLength πŸ“‹Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.SharedArrayBuffer.slice πŸ“‹Chrome7/24/2018 Firefox7/28/2020735
javascript.builtins.WeakRef πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.WeakRef.WeakRef πŸ“‹Chrome7/27/2020 Firefox7/28/20201
javascript.builtins.WeakRef.deref πŸ“‹Chrome7/27/2020 Firefox7/28/20201
webassembly.threads-and-atomics πŸ“‹Chrome4/23/2019 Firefox7/28/2020462
api.Animation.commitStyles πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Animation.finished πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.Animation.persist πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Animation.ready πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.Animation.remove_event πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Animation.remove_filling_animation Firefox4/7/2020 Chrome7/27/2020111
api.Animation.replaceState πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Animation.timeline πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
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.AnimationPlaybackEvent πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.AnimationPlaybackEvent.AnimationPlaybackEvent πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.AnimationPlaybackEvent.currentTime πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.AnimationPlaybackEvent.timelineTime πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.AnimationTimeline πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.AnimationTimeline.currentTime πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.CSSAnimation πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.CSSAnimation.animationName πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.CSSTransition πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.CSSTransition.transitionProperty πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Document.getAnimations πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
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.timeline πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.DocumentTimeline πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.DocumentTimeline.DocumentTimeline πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Element.animate.implicit_tofrom Firefox4/7/2020 Chrome7/27/2020111
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.animate.options_pseudoElement_parameter πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.Element.getAnimations πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.KeyframeEffect.getKeyframes πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.KeyframeEffect.pseudoElement πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
api.KeyframeEffect.setKeyframes πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
api.ReportingObserver.worker_support Firefox6/2/2020 Chrome7/27/202055
api.ResizeObserver.observe.options_box_parameter Firefox9/3/2019 Chrome7/27/2020328
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.ResizeObserverSize πŸ“‹Firefox9/3/2019 Chrome7/27/2020328
api.ResizeObserverSize.blockSize πŸ“‹Firefox9/3/2019 Chrome7/27/2020328
api.ResizeObserverSize.inlineSize πŸ“‹Firefox9/3/2019 Chrome7/27/2020328
api.ShadowRoot.getAnimations πŸ“‹Firefox4/7/2020 Chrome7/27/2020111
css.properties.column-gap.flex_context πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
css.properties.gap.flex_context πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
css.properties.row-gap.flex_context πŸ“‹Firefox10/23/2018 Chrome7/27/2020643
css.properties.ruby-position πŸ“‹Firefox5/12/2015 Chrome7/27/20201903
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 Chrome7/27/20201903
css.properties.ruby-position.under Firefox5/12/2015 Chrome7/27/20201903
css.types.global_keywords.revert πŸ“‹Firefox5/21/2019 Chrome7/27/2020433

2020/6

API First Browser Date Last Browser Date Days Notes
api.HTMLLinkElement.imageSizes πŸ“‹Chrome3/12/2019 Firefox6/30/2020476
api.HTMLLinkElement.imageSrcset πŸ“‹Chrome3/12/2019 Firefox6/30/2020476
css.selectors.read-only πŸ“‹Chrome12/11/2008 Firefox6/30/20204219
css.selectors.read-write πŸ“‹Chrome12/11/2008 Firefox6/30/20204219
html.elements.link.imagesizes πŸ“‹Chrome3/12/2019 Firefox6/30/2020476
html.elements.link.imagesrcset πŸ“‹Chrome3/12/2019 Firefox6/30/2020476
javascript.builtins.Atomics πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
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“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.and πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.compareExchange πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.exchange πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.isLockFree πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.load πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.notify πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.or πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.store πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.sub πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.wait πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Atomics.xor πŸ“‹Chrome7/24/2018 Firefox6/30/2020707
javascript.builtins.Intl.ListFormat πŸ“‹Chrome1/29/2019 Firefox6/30/2020518
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“‹Chrome1/29/2019 Firefox6/30/2020518
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“‹Chrome1/29/2019 Firefox6/30/2020518
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“‹Chrome1/29/2019 Firefox6/30/2020518
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“‹Chrome1/29/2019 Firefox6/30/2020518
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“‹Chrome1/29/2019 Firefox6/30/2020518
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.options_parameter.options_compactDisplay_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencySign_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_notation_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_signDisplay_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unitDisplay_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_unit_parameter Chrome9/10/2019 Firefox6/30/2020294
javascript.builtins.RegExp.dotAll πŸ“‹Chrome10/17/2017 Firefox6/30/2020987
javascript.builtins.Symbol.toStringTag.dom_objects Chrome4/13/2016 Firefox6/30/20201539
javascript.regular_expressions.lookbehind_assertion πŸ“‹Chrome10/17/2017 Firefox6/30/2020987
javascript.regular_expressions.named_backreference πŸ“‹Chrome1/23/2018 Firefox6/30/2020889
javascript.regular_expressions.named_capturing_group πŸ“‹Chrome1/23/2018 Firefox6/30/2020889
javascript.regular_expressions.unicode_character_class_escape πŸ“‹Chrome1/23/2018 Firefox6/30/2020889
webassembly.api.Memory.Memory.shared πŸ“‹Chrome4/23/2019 Firefox6/30/2020434
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.bulk-memory-operations πŸ“‹Chrome6/4/2019 Firefox6/30/2020392
api.IDBCursor.request πŸ“‹Chrome7/30/2019 Firefox6/2/2020308
api.Report.toJSON Chrome9/4/2018 Firefox6/2/2020637
api.ReportBody.toJSON Chrome9/4/2018 Firefox6/2/2020637
html.elements.input.type_range.labeled_values πŸ“‹Chrome10/7/2014 Firefox6/2/20202065

2020/5

API First Browser Date Last Browser Date Days Notes
api.Element.animationcancel_event πŸ“‹Firefox6/13/2017 Chrome5/19/20201071
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.RTCPeerConnection.canTrickleIceCandidates πŸ“‹Firefox6/7/2016 Chrome5/19/20201442
css.at-rules.supports.selector Firefox9/3/2019 Chrome5/19/2020259
css.properties.line-break.anywhere πŸ“‹Firefox9/3/2019 Chrome5/19/2020259
api.AudioParamMap πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.@@iterator Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.entries Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.forEach Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.get Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.has Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.keys Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.size Chrome4/17/2018 Firefox5/5/2020749
api.AudioParamMap.values Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorklet πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletGlobalScope πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletGlobalScope.currentFrame πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletGlobalScope.currentTime πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletGlobalScope.registerProcessor πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletGlobalScope.sampleRate πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletNode πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletNode.AudioWorkletNode πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletNode.parameters πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletNode.port πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletNode.processorerror_event πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.AudioWorkletProcessor πŸ“‹Chrome1/23/2018 Firefox5/5/2020833
api.AudioWorkletProcessor.AudioWorkletProcessor πŸ“‹Chrome1/23/2018 Firefox5/5/2020833
api.AudioWorkletProcessor.port πŸ“‹Chrome1/23/2018 Firefox5/5/2020833
api.BaseAudioContext.audioWorklet πŸ“‹Chrome4/17/2018 Firefox5/5/2020749
api.IntersectionObserver.IntersectionObserver.options_root_parameter_Document Chrome4/7/2020 Firefox5/5/202028
api.Worklet πŸ“‹Chrome3/6/2018 Firefox5/5/2020791
api.Worklet.addModule πŸ“‹Chrome3/6/2018 Firefox5/5/2020791
api.WorkletGlobalScope πŸ“‹Chrome3/6/2018 Firefox5/5/2020791
css.properties.grid-template-columns.repeat πŸ“‹Chrome3/9/2017 Firefox5/5/20201153
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“‹Chrome3/9/2017 Firefox5/5/20201153
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).
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_calendar_parameter Chrome2/4/2020 Firefox5/5/202091
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_numberingSystem_parameter Chrome2/4/2020 Firefox5/5/202091
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_numberingSystem_parameter Chrome1/10/2013 Firefox5/5/20202672
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numberingSystem_parameter Chrome12/4/2018 Firefox5/5/2020518

2020/4

API First Browser Date Last Browser Date Days Notes
api.Crypto.subtle.secure_context_required Chrome7/25/2017 Firefox4/7/2020987
api.HTMLElement.nonce πŸ“‹Chrome9/5/2017 Firefox4/7/2020945
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.HTMLFormElement.requestSubmit πŸ“‹Chrome7/30/2019 Firefox4/7/2020252
api.HTMLImageElement.loading πŸ“‹Chrome9/10/2019 Firefox4/7/2020210
api.RTCPeerConnection.setLocalDescription.description_parameter_optional Chrome2/4/2020 Firefox4/7/202063
api.RTCStatsReport.type_outbound-rtp.remoteId πŸ“‹Firefox2/4/2014 Chrome4/7/20202254
api.SVGElement.nonce πŸ“‹Chrome9/5/2017 Firefox4/7/2020945
api.ServiceWorkerGlobalScope.messageerror_event πŸ“‹Firefox1/29/2019 Chrome4/7/2020434
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.SubmitEvent πŸ“‹Chrome4/7/2020 Firefox4/7/2020
api.SubmitEvent.SubmitEvent πŸ“‹Chrome4/7/2020 Firefox4/7/2020
api.SubmitEvent.submitter πŸ“‹Chrome4/7/2020 Firefox4/7/2020
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.SubtleCrypto.secure_context_required Chrome7/25/2017 Firefox4/7/2020987
css.properties.image-orientation πŸ“‹Firefox12/10/2013 Chrome4/7/20202310
css.properties.image-orientation.from-image πŸ“‹Firefox12/10/2013 Chrome4/7/20202310
css.properties.image-orientation.none πŸ“‹Firefox12/10/2013 Chrome4/7/20202310
css.types.clamp πŸ“‹Chrome12/10/2019 Firefox4/7/2020119
css.types.max πŸ“‹Chrome12/10/2019 Firefox4/7/2020119
css.types.min πŸ“‹Chrome12/10/2019 Firefox4/7/2020119
html.elements.img.loading πŸ“‹Chrome9/10/2019 Firefox4/7/2020210
html.global_attributes.nonce πŸ“‹Chrome9/5/2017 Firefox4/7/2020945
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.
javascript.builtins.Intl.Locale πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.Locale πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.baseName πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.calendar πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.caseFirst πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.collation πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.hourCycle πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.language πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.maximize πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.minimize πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.numberingSystem πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.numeric πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.region πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.script πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.builtins.Intl.Locale.toString πŸ“‹Chrome4/23/2019 Firefox4/7/2020350
javascript.classes.static.class_fields πŸ“‹Chrome1/29/2019 Firefox4/7/2020434

2020/3

API First Browser Date Last Browser Date Days Notes
api.HTMLIFrameElement.allow πŸ“‹Chrome7/25/2017 Firefox3/10/2020959
api.IDBTransaction.commit πŸ“‹Chrome7/30/2019 Firefox3/10/2020224
api.TextMetrics.actualBoundingBoxAscent πŸ“‹Chrome9/10/2019 Firefox3/10/2020182
api.TextMetrics.actualBoundingBoxDescent πŸ“‹Chrome9/10/2019 Firefox3/10/2020182
api.TextMetrics.actualBoundingBoxLeft πŸ“‹Chrome9/10/2019 Firefox3/10/2020182
api.TextMetrics.actualBoundingBoxRight πŸ“‹Chrome9/10/2019 Firefox3/10/2020182
api.WorkerGlobalScope.languagechange_event πŸ“‹Chrome1/25/2010 Firefox3/10/20203697
css.properties.text-underline-position πŸ“‹Chrome2/20/2014 Firefox3/10/20202210
css.properties.text-underline-position.auto πŸ“‹Chrome2/20/2014 Firefox3/10/20202210
css.properties.text-underline-position.left πŸ“‹Chrome12/4/2018 Firefox3/10/2020462
css.properties.text-underline-position.right πŸ“‹Chrome12/4/2018 Firefox3/10/2020462
css.properties.text-underline-position.under πŸ“‹Chrome2/20/2014 Firefox3/10/20202210
html.elements.audio.crossorigin πŸ“‹Chrome2/20/2014 Firefox3/10/20202210
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“‹Chrome7/25/2017 Firefox3/10/2020959
html.elements.iframe.allow.autoplay πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.camera πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.document-domain πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.encrypted-media πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.geolocation πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.microphone πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.midi πŸ“‹Chrome1/23/2018 Firefox3/10/2020777
html.elements.iframe.allow.payment πŸ“‹Chrome7/25/2017 Firefox3/10/2020959
html.elements.video.crossorigin πŸ“‹Chrome2/20/2014 Firefox3/10/20202210
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“‹Chrome3/12/2019 Firefox3/10/2020364
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.
javascript.operators.optional_chaining πŸ“‹Chrome2/4/2020 Firefox3/10/202035

2020/2

API First Browser Date Last Browser Date Days Notes
css.properties.overscroll-behavior-block πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-block.auto πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-block.contain πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-block.none πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-inline πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-inline.auto πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-inline.contain πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
css.properties.overscroll-behavior-inline.none πŸ“‹Chrome9/10/2019 Firefox2/11/2020154
api.HTMLVideoElement.getVideoPlaybackQuality πŸ“‹Firefox11/3/2015 Chrome2/4/20201554
Internet Explorer: Only works on Windows 8+.
api.Navigator.registerProtocolHandler.secure_context_required Firefox9/5/2018 Chrome2/4/2020517
api.OES_fbo_render_mipmap πŸ“‹Firefox12/10/2019 Chrome2/4/202056
api.RTCPeerConnection.setRemoteDescription.implicit_rollback Firefox10/22/2019 Chrome2/4/2020105
api.RTCStatsReport.type_candidate-pair.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_candidate-pair.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_candidate-pair.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_inbound-rtp.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_inbound-rtp.jitter πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_inbound-rtp.kind πŸ“‹Firefox10/23/2018 Chrome2/4/2020469
api.RTCStatsReport.type_inbound-rtp.nackCount πŸ“‹Firefox8/8/2017 Chrome2/4/2020910
api.RTCStatsReport.type_inbound-rtp.packetsLost πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_inbound-rtp.packetsReceived πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_inbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_inbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_inbound-rtp.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_local-candidate πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_local-candidate.candidateType πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_local-candidate.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_local-candidate.port πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_local-candidate.priority πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_local-candidate.protocol πŸ“‹Firefox12/11/2018 Chrome2/4/2020420
api.RTCStatsReport.type_local-candidate.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_local-candidate.transportId πŸ“‹Firefox7/22/2014 Chrome2/4/20202023
api.RTCStatsReport.type_local-candidate.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_outbound-rtp πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_outbound-rtp.bytesSent πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_outbound-rtp.framesEncoded πŸ“‹Firefox8/8/2017 Chrome2/4/2020910
api.RTCStatsReport.type_outbound-rtp.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_outbound-rtp.kind πŸ“‹Firefox10/23/2018 Chrome2/4/2020469
api.RTCStatsReport.type_outbound-rtp.packetsSent πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_outbound-rtp.qpSum πŸ“‹Firefox3/19/2019 Chrome2/4/2020322
api.RTCStatsReport.type_outbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_outbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_outbound-rtp.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-candidate πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_remote-candidate.candidateType πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_remote-candidate.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-candidate.port πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-candidate.priority πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-candidate.protocol πŸ“‹Firefox12/11/2018 Chrome2/4/2020420
api.RTCStatsReport.type_remote-candidate.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-candidate.transportId πŸ“‹Firefox7/22/2014 Chrome2/4/20202023
api.RTCStatsReport.type_remote-candidate.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_remote-inbound-rtp.id πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp.jitter πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp.kind πŸ“‹Firefox10/23/2018 Chrome2/4/2020469
api.RTCStatsReport.type_remote-inbound-rtp.localId πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp.packetsLost πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp.ssrc πŸ“‹Firefox2/4/2014 Chrome2/4/20202191
api.RTCStatsReport.type_remote-inbound-rtp.timestamp πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.RTCStatsReport.type_remote-inbound-rtp.type πŸ“‹Firefox1/7/2020 Chrome2/4/202028
api.ServiceWorkerContainer.messageerror_event πŸ“‹Firefox1/29/2019 Chrome2/4/2020371
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.
css.properties.offset-path.none πŸ“‹Firefox1/7/2020 Chrome2/4/202028
css.properties.overflow-wrap.anywhere πŸ“‹Firefox1/29/2019 Chrome2/4/2020371
http.headers.Set-Cookie.SameSite.Lax_default Firefox9/3/2019 Chrome2/4/2020154
javascript.operators.nullish_coalescing πŸ“‹Firefox1/7/2020 Chrome2/4/202028

2020/1

API First Browser Date Last Browser Date Days Notes
api.Element.part πŸ“‹Chrome3/12/2019 Firefox1/7/2020301
api.FormDataEvent πŸ“‹Chrome9/10/2019 Firefox1/7/2020119
api.FormDataEvent.FormDataEvent πŸ“‹Chrome9/10/2019 Firefox1/7/2020119
api.FormDataEvent.formData πŸ“‹Chrome9/10/2019 Firefox1/7/2020119
api.GeolocationCoordinates πŸ“‹Chrome12/10/2019 Firefox1/7/202028
api.GeolocationPosition πŸ“‹Chrome12/10/2019 Firefox1/7/202028
api.GeolocationPositionError πŸ“‹Chrome12/10/2019 Firefox1/7/202028
api.HTMLFormElement.formdata_event πŸ“‹Chrome9/10/2019 Firefox1/7/2020119
api.MediaStream.removetrack_event πŸ“‹Chrome3/26/2013 Firefox1/7/20202478
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.RTCRtpReceiver.getContributingSources.rtpTimestamp πŸ“‹Chrome7/30/2019 Firefox1/7/2020161
css.properties.letter-spacing.svg_elements Chrome12/11/2008 Firefox1/7/20204044
css.properties.offset πŸ“‹Chrome12/1/2016 Firefox1/7/20201132
css.properties.offset.none πŸ“‹Chrome9/5/2017 Firefox1/7/2020854
css.properties.offset-distance πŸ“‹Chrome12/1/2016 Firefox1/7/20201132
css.properties.offset-path πŸ“‹Chrome12/1/2016 Firefox1/7/20201132
Samsung Internet: path() is the only value type supported.
css.properties.offset-path.path Chrome1/23/2018 Firefox1/7/2020714
css.properties.offset-rotate πŸ“‹Chrome1/25/2017 Firefox1/7/20201077
css.properties.offset-rotate.auto πŸ“‹Chrome10/13/2015 Firefox1/7/20201547
css.properties.offset-rotate.reverse πŸ“‹Chrome10/13/2015 Firefox1/7/20201547
css.properties.word-spacing.svg_elements Chrome12/11/2008 Firefox1/7/20204044
css.selectors.part πŸ“‹Chrome3/12/2019 Firefox1/7/2020301
css.types.basic-shape.path πŸ“‹Chrome7/20/2016 Firefox1/7/20201266
css.types.basic-shape.path.offset-path πŸ“‹Chrome1/25/2017 Firefox1/7/20201077
html.global_attributes.exportparts πŸ“‹Chrome3/12/2019 Firefox1/7/2020301
html.global_attributes.part πŸ“‹Chrome3/12/2019 Firefox1/7/2020301

2019/12

API First Browser Date Last Browser Date Days Notes
api.Element.animationend_event πŸ“‹Firefox1/24/2017 Chrome12/10/20191050
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“‹Firefox1/24/2017 Chrome12/10/20191050
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“‹Firefox1/24/2017 Chrome12/10/20191050
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.MediaRecorder.audioBitsPerSecond πŸ“‹Chrome3/2/2016 Firefox12/10/20191378
api.MediaRecorder.videoBitsPerSecond πŸ“‹Chrome3/2/2016 Firefox12/10/20191378
api.RTCStatsReport.type_inbound-rtp πŸ“‹Firefox2/4/2014 Chrome12/10/20192135
api.RTCStatsReport.type_inbound-rtp.bytesReceived πŸ“‹Firefox2/4/2014 Chrome12/10/20192135
api.RTCStatsReport.type_inbound-rtp.framesDecoded πŸ“‹Firefox9/28/2017 Chrome12/10/2019803
css.properties.column-span πŸ“‹Chrome4/13/2016 Firefox12/10/20191336
css.properties.column-span.all πŸ“‹Chrome9/2/2010 Firefox12/10/20193386
css.properties.column-span.none πŸ“‹Chrome9/2/2010 Firefox12/10/20193386
css.properties.font-optical-sizing πŸ“‹Firefox9/5/2018 Chrome12/10/2019461
css.properties.font-optical-sizing.auto πŸ“‹Firefox9/5/2018 Chrome12/10/2019461
css.properties.font-optical-sizing.none πŸ“‹Firefox9/5/2018 Chrome12/10/2019461
css.properties.font-size.xxx-large Firefox10/22/2019 Chrome12/10/201949
css.properties.list-style-type.string Firefox7/2/2015 Chrome12/10/20191622
html.elements.img.aspect_ratio_computed_from_attributes Chrome12/10/2019 Firefox12/10/2019
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).
html.elements.video.aspect_ratio_computed_from_attributes Chrome12/10/2019 Firefox12/10/2019
http.mixed-content πŸ“‹Firefox8/6/2013 Chrome12/10/20192317
http.mixed-content.allow_file_urls πŸ“‹Firefox8/6/2013 Chrome12/10/20192317
http.mixed-content.allow_loopback_url πŸ“‹Firefox8/8/2017 Chrome12/10/2019854
http.mixed-content.blockable_mixed_content πŸ“‹Firefox8/6/2013 Chrome12/10/20192317
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.builtins.Promise.allSettled πŸ“‹Chrome7/30/2019 Firefox12/10/2019133

2019/10

API First Browser Date Last Browser Date Days Notes
api.AudioContext.baseLatency πŸ“‹Chrome4/19/2017 Firefox10/22/2019916
api.AudioContext.getOutputTimestamp πŸ“‹Chrome3/9/2017 Firefox10/22/2019957
api.CanvasRenderingContext2D.getTransform πŸ“‹Chrome7/24/2018 Firefox10/22/2019455
api.CanvasRenderingContext2D.setTransform.matrix_parameter Chrome7/24/2018 Firefox10/22/2019455
api.Document.all πŸ“‹Chrome1/23/2018 Firefox10/22/2019637
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“‹Chrome1/23/2018 Firefox10/22/2019637
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“‹Chrome1/23/2018 Firefox10/22/2019637
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“‹Chrome1/23/2018 Firefox10/22/2019637
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.FeaturePolicy.features Chrome4/23/2019 Firefox10/22/2019182
api.MediaDevices.getSupportedConstraints.return_object_property_groupId πŸ“‹Chrome8/31/2016 Firefox10/22/20191147
api.MediaElementAudioSourceNode.mediaElement πŸ“‹Chrome10/25/2011 Firefox10/22/20192919
api.MediaStreamAudioSourceNode.mediaStream πŸ“‹Chrome9/25/2012 Firefox10/22/20192583
api.MediaStreamTrack.applyConstraints.groupId_constraint πŸ“‹Chrome6/5/2017 Firefox10/22/2019869
api.PaymentResponse.payerdetailchange_event πŸ“‹Firefox8/8/2017 Chrome10/22/2019805
api.PaymentResponse.retry πŸ“‹Firefox8/8/2017 Chrome10/22/2019805
api.RTCPeerConnection.restartIce πŸ“‹Chrome9/10/2019 Firefox10/22/201942
api.SVGElement.focus.options_preventScroll_parameter Firefox7/9/2019 Chrome10/22/2019105
css.properties.grid-auto-columns πŸ“‹Chrome3/9/2017 Firefox10/22/2019957
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“‹Chrome3/9/2017 Firefox10/22/2019957
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.opacity.percentages Chrome10/22/2019 Firefox10/22/2019
css.properties.scroll-padding-bottom.auto πŸ“‹Firefox7/9/2019 Chrome10/22/2019105
css.properties.scroll-padding-left.auto πŸ“‹Firefox7/9/2019 Chrome10/22/2019105
css.properties.scroll-padding-right.auto πŸ“‹Firefox7/9/2019 Chrome10/22/2019105
css.properties.scroll-padding-top.auto πŸ“‹Firefox7/9/2019 Chrome10/22/2019105
css.properties.shape-image-threshold.percentages Chrome10/22/2019 Firefox10/22/2019
css.properties.text-decoration-skip-ink πŸ“‹Chrome1/23/2018 Firefox10/22/2019637
css.properties.text-decoration-skip-ink.auto πŸ“‹Chrome1/23/2018 Firefox10/22/2019637
css.properties.text-decoration-skip-ink.none πŸ“‹Chrome1/23/2018 Firefox10/22/2019637
http.headers.Origin πŸ“‹Chrome12/11/2008 Firefox10/22/20193967
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.
http.headers.Referer.length_limit_4096B Chrome9/10/2019 Firefox10/22/201942
javascript.builtins.BigInt.toLocaleString.locales_parameter Chrome7/30/2019 Firefox10/22/201984
Deno: Only the locale data for en-US is available.
javascript.builtins.BigInt.toLocaleString.options_parameter Chrome7/30/2019 Firefox10/22/201984
javascript.builtins.Intl.RelativeTimeFormat.formatToParts πŸ“‹Chrome12/4/2018 Firefox10/22/2019322
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.grammar.numeric_separators πŸ“‹Chrome6/4/2019 Firefox10/22/2019140

2019/9

API First Browser Date Last Browser Date Days Notes
api.SpeechSynthesisEvent.charLength πŸ“‹Firefox4/19/2017 Chrome9/10/2019874
css.properties.animation-timing-function.jump Firefox1/29/2019 Chrome9/10/2019224
css.properties.transition-timing-function.jump Firefox1/29/2019 Chrome9/10/2019224
css.types.easing-function.steps.jump Firefox1/29/2019 Chrome9/10/2019224
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currencyDisplay_parameter Firefox11/3/2015 Chrome9/10/20191407
Safari: Doesn't support currencyDisplay: 'narrowSymbol'.Safari on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.WebView on iOS: Doesn't support currencyDisplay: 'narrowSymbol'.
api.Blob.arrayBuffer πŸ“‹Chrome7/30/2019 Firefox9/3/201935
api.Blob.stream πŸ“‹Chrome7/30/2019 Firefox9/3/201935
api.Blob.text πŸ“‹Chrome7/30/2019 Firefox9/3/201935
api.DOMMatrix.fromFloat32Array_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrix.fromFloat64Array_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrix.fromMatrix_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrix.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrixReadOnly.fromFloat32Array_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrixReadOnly.fromFloat64Array_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrixReadOnly.fromMatrix_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMMatrixReadOnly.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMPoint.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMPointReadOnly.matrixTransform πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMPointReadOnly.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMQuad.fromQuad_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMQuad.fromRect_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMQuad.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMRect.fromRect_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMRect.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.DOMRectReadOnly.fromRect_static πŸ“‹Chrome9/5/2017 Firefox9/3/2019728
api.DOMRectReadOnly.worker_support Chrome9/5/2017 Firefox9/3/2019728
api.Document.alinkColor πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
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“‹Chrome1/23/2018 Firefox9/3/2019588
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“‹Chrome9/1/2015 Firefox9/3/20191463
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“‹Chrome7/16/2014 Firefox9/3/20191875
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“‹Chrome12/11/2008 Firefox9/3/20193918
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 Chrome12/11/2008 Firefox9/3/20193918
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.featurePolicy Chrome4/23/2019 Firefox9/3/2019133
api.Document.fgColor πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
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“‹Chrome1/23/2018 Firefox9/3/2019588
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“‹Chrome9/1/2015 Firefox9/3/20191463
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 Chrome12/11/2008 Firefox9/3/20193918
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 Chrome12/11/2008 Firefox9/3/20193918
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.queryCommandState Chrome12/11/2008 Firefox9/3/20193918
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.queryCommandSupported Chrome12/11/2008 Firefox9/3/20193918
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 Chrome12/11/2008 Firefox9/3/20193918
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.vlinkColor πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
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“‹Chrome9/1/2015 Firefox9/3/20191463
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“‹Chrome9/1/2015 Firefox9/3/20191463
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.HTMLIFrameElement.featurePolicy Chrome4/23/2019 Firefox9/3/2019133
api.Navigator.mediaDevices.secure_context_required Chrome4/23/2019 Firefox9/3/2019133
api.PromiseRejectionEvent πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.PromiseRejectionEvent.PromiseRejectionEvent πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.PromiseRejectionEvent.promise πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.PromiseRejectionEvent.reason πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.ResizeObserver πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserver.ResizeObserver πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserver.disconnect πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserver.observe πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserver.unobserve πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserverEntry πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserverEntry.contentRect πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.ResizeObserverEntry.target πŸ“‹Chrome1/23/2018 Firefox9/3/2019588
api.SVGGeometryElement.isPointInFill πŸ“‹Chrome2/20/2014 Firefox9/3/20192021
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 πŸ“‹Chrome2/20/2014 Firefox9/3/20192021
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.StaticRange πŸ“‹Chrome7/25/2017 Firefox9/3/2019770
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“‹Chrome7/25/2017 Firefox9/3/2019770
api.StaticRange.endContainer πŸ“‹Chrome7/25/2017 Firefox9/3/2019770
api.StaticRange.endOffset πŸ“‹Chrome7/25/2017 Firefox9/3/2019770
api.StaticRange.startContainer πŸ“‹Chrome7/25/2017 Firefox9/3/2019770
api.StaticRange.startOffset πŸ“‹Chrome7/25/2017 Firefox9/3/2019770
api.Window.rejectionhandled_event πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.Window.unhandledrejection_event πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
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“‹Chrome3/2/2016 Firefox9/3/20191280
api.WorkerGlobalScope.unhandledrejection_event πŸ“‹Chrome3/2/2016 Firefox9/3/20191280
api.queueMicrotask πŸ“‹Chrome12/4/2018 Firefox9/3/2019273
css.properties.contain πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.content πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.layout πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.none πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.paint πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.size πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.contain.strict πŸ“‹Chrome7/20/2016 Firefox9/3/20191140
css.properties.cx πŸ“‹Chrome5/19/2015 Firefox9/3/20191568
css.properties.cy πŸ“‹Chrome5/19/2015 Firefox9/3/20191568
css.properties.line-break πŸ“‹Chrome4/19/2017 Firefox9/3/2019867
css.properties.line-break.auto πŸ“‹Chrome2/21/2013 Firefox9/3/20192385
css.properties.line-break.loose πŸ“‹Chrome2/21/2013 Firefox9/3/20192385
css.properties.line-break.normal πŸ“‹Chrome12/11/2008 Firefox9/3/20193918
css.properties.line-break.strict πŸ“‹Chrome2/21/2013 Firefox9/3/20192385
css.properties.r πŸ“‹Chrome5/19/2015 Firefox9/3/20191568
css.properties.rx πŸ“‹Chrome5/19/2015 Firefox9/3/20191568
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“‹Chrome8/31/2016 Firefox9/3/20191098
css.properties.ry πŸ“‹Chrome5/19/2015 Firefox9/3/20191568
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“‹Chrome8/31/2016 Firefox9/3/20191098
css.properties.user-select πŸ“‹Chrome10/12/2016 Firefox9/3/20191056
css.properties.white-space.break-spaces πŸ“‹Chrome7/30/2019 Firefox9/3/201935
css.properties.x πŸ“‹Chrome4/14/2015 Firefox9/3/20191603
css.properties.y πŸ“‹Chrome4/14/2015 Firefox9/3/20191603
http.headers.Access-Control-Allow-Headers.wildcard Chrome12/6/2017 Firefox9/3/2019636
http.headers.Access-Control-Allow-Methods.wildcard Chrome12/6/2017 Firefox9/3/2019636
http.headers.Access-Control-Expose-Headers.wildcard Chrome3/6/2018 Firefox9/3/2019546
javascript.classes.public_class_fields πŸ“‹Chrome1/29/2019 Firefox9/3/2019217
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.

2019/7

API First Browser Date Last Browser Date Days Notes
api.Animation.pending πŸ“‹Firefox3/13/2018 Chrome7/30/2019504
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.updatePlaybackRate πŸ“‹Firefox5/9/2018 Chrome7/30/2019447
api.PaymentMethodChangeEvent πŸ“‹Firefox8/8/2017 Chrome7/30/2019721
api.PaymentMethodChangeEvent.PaymentMethodChangeEvent πŸ“‹Firefox8/8/2017 Chrome7/30/2019721
api.PaymentMethodChangeEvent.methodDetails πŸ“‹Firefox8/8/2017 Chrome7/30/2019721
api.PaymentMethodChangeEvent.methodName πŸ“‹Firefox8/8/2017 Chrome7/30/2019721
api.PaymentRequest.paymentmethodchange_event πŸ“‹Firefox8/8/2017 Chrome7/30/2019721
api.WorkerNavigator.mediaCapabilities πŸ“‹Firefox10/23/2018 Chrome7/30/2019280
css.at-rules.media.prefers-color-scheme πŸ“‹Firefox5/21/2019 Chrome7/30/201970
api.CSSStyleSheet.addRule πŸ“‹Chrome12/11/2008 Firefox7/9/20193862
api.CSSStyleSheet.removeRule πŸ“‹Chrome12/11/2008 Firefox7/9/20193862
api.CSSStyleSheet.rules πŸ“‹Chrome12/11/2008 Firefox7/9/20193862
api.Document.cookie πŸ“‹Chrome12/11/2008 Firefox7/9/20193862
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.HTMLElement.focus.options_preventScroll_parameter Chrome1/23/2018 Firefox7/9/2019532
api.HTMLImageElement.decode πŸ“‹Chrome1/23/2018 Firefox7/9/2019532
api.HTMLTrackElement.cuechange_event πŸ“‹Chrome1/14/2014 Firefox7/9/20192002
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 Chrome8/31/2016 Firefox7/9/20191042
api.PerformanceObserver.supportedEntryTypes_static πŸ“‹Chrome3/12/2019 Firefox7/9/2019119
api.RTCDataChannel.negotiated πŸ“‹Chrome10/1/2013 Firefox7/9/20192107
api.RTCRtpReceiver.getContributingSources.video_tracks_supported Chrome3/12/2019 Firefox7/9/2019119
api.RTCRtpReceiver.getSynchronizationSources.video_tracks_supported Chrome3/12/2019 Firefox7/9/2019119
api.SVGImageElement.decode πŸ“‹Chrome1/23/2018 Firefox7/9/2019532
css.properties.line-clamp πŸ“‹Chrome9/2/2010 Firefox7/9/20193232
Safari: Accidental exposure.Safari on iOS: Accidental exposure.WebView on iOS: Accidental exposure.
css.properties.scroll-margin-block πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-block-end πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-block-start πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-bottom πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
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-inline πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-inline-end πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-inline-start πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-margin-left πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
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“‹Chrome9/4/2018 Firefox7/9/2019308
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“‹Chrome9/4/2018 Firefox7/9/2019308
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“‹Chrome9/4/2018 Firefox7/9/2019308
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.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block-end πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block-end.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block-start πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-block-start.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-bottom πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
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-inline πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-inline.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-inline-end πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-inline-end.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-inline-start πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-inline-start.auto πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-padding-left πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
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“‹Chrome9/4/2018 Firefox7/9/2019308
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“‹Chrome9/4/2018 Firefox7/9/2019308
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-snap-align πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-align.center πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-align.end πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-align.none πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-align.start πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-type.block πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-type.both πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-type.inline πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-type.x πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
css.properties.scroll-snap-type.y πŸ“‹Chrome9/4/2018 Firefox7/9/2019308
http.headers.Cache-Control.stale-while-revalidate πŸ“‹Chrome6/4/2019 Firefox7/9/201935
javascript.builtins.BigInt πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.BigInt πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.asIntN πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.asUintN πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.toLocaleString πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.toString πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt.valueOf πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt64Array πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigInt64Array.BigInt64Array πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigUint64Array πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.BigUint64Array.BigUint64Array πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.DataView.getBigInt64 πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.DataView.getBigUint64 πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.DataView.setBigInt64 πŸ“‹Chrome5/29/2018 Firefox7/9/2019406
javascript.builtins.DataView.setBigUint64 πŸ“‹Chrome5/29/2018 Firefox7/9/2019406

2019/6

API First Browser Date Last Browser Date Days Notes
api.Animation πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.Animation πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.cancel πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.cancel_event πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.currentTime πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.effect πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.Animation.finish πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.finish_event πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.id πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.pause πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.play πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.playState πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
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 Chrome6/4/20191036
api.Animation.reverse πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.Animation.startTime πŸ“‹Firefox8/2/2016 Chrome6/4/20191036
api.AnimationEffect πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.AnimationEffect.getComputedTiming πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.AnimationEffect.getTiming πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.AnimationEffect.updateTiming πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.EXT_float_blend πŸ“‹Firefox5/21/2019 Chrome6/4/201914
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.HTMLCanvasElement.getContext.webgl2_context.options_powerPreference_parameter πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
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.HTMLCanvasElement.getContext.webgl_context.options_powerPreference_parameter πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
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.KeyframeEffect πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.KeyframeEffect.KeyframeEffect πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
api.KeyframeEffect.target πŸ“‹Firefox10/23/2018 Chrome6/4/2019224
webassembly.non-trapping-float-to-int-conversions πŸ“‹Firefox12/11/2018 Chrome6/4/2019175

2019/5

API First Browser Date Last Browser Date Days Notes
api.InputEvent.data πŸ“‹Chrome7/25/2017 Firefox5/21/2019665
api.InputEvent.dataTransfer πŸ“‹Chrome7/25/2017 Firefox5/21/2019665
api.Notification.secure_context_required Chrome10/17/2017 Firefox5/21/2019581
api.RTCIceCandidate.usernameFragment πŸ“‹Chrome4/23/2019 Firefox5/21/201928
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.WorkerGlobalScope.importScripts.mime_checks Chrome12/4/2018 Firefox5/21/2019168
css.properties.word-break.break-word πŸ“‹Chrome12/11/2008 Firefox5/21/20193813
html.elements.video.autoplay.requires_muted_audio Chrome5/29/2018 Firefox5/21/2019357
Firefox for Android: Between versions 79 and 91, the default behavior was to block videos from autoplaying, regardless of whether audio was muted.
javascript.builtins.RegExp.@@matchAll πŸ“‹Chrome3/12/2019 Firefox5/21/201970
javascript.builtins.String.matchAll πŸ“‹Chrome3/12/2019 Firefox5/21/201970
javascript.builtins.Symbol.matchAll πŸ“‹Chrome3/12/2019 Firefox5/21/201970
javascript.grammar.hashbang_comments πŸ“‹Chrome4/23/2019 Firefox5/21/201928
javascript.operators.import πŸ“‹Chrome12/6/2017 Firefox5/21/2019531
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.

2019/4

API First Browser Date Last Browser Date Days Notes
api.AudioContext.AudioContext.options_sampleRate_parameter πŸ“‹Firefox6/26/2018 Chrome4/23/2019301
api.Element.transitionrun_event πŸ“‹Firefox4/19/2017 Chrome4/23/2019734
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 Chrome4/23/2019734
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.FeaturePolicy Firefox1/29/2019 Chrome4/23/201984
api.FeaturePolicy.allowedFeatures Firefox1/29/2019 Chrome4/23/201984
api.FeaturePolicy.allowsFeature Firefox1/29/2019 Chrome4/23/201984
api.FeaturePolicy.getAllowlistForFeature Firefox1/29/2019 Chrome4/23/201984
api.RTCRtpSender.setParameters.parameters_encodings_parameter.scaleResolutionDownBy πŸ“‹Firefox4/26/2016 Chrome4/23/20191092
api.ServiceWorkerContainer.startMessages πŸ“‹Firefox12/11/2018 Chrome4/23/2019133
api.TextEncoder.encodeInto πŸ“‹Firefox3/19/2019 Chrome4/23/201935
css.at-rules.media.prefers-reduced-motion πŸ“‹Firefox10/23/2018 Chrome4/23/2019182

2019/3

API First Browser Date Last Browser Date Days Notes
api.Event.returnValue πŸ“‹Chrome12/11/2008 Firefox3/19/20193750
api.HTMLSlotElement.assignedElements πŸ“‹Chrome3/6/2018 Firefox3/19/2019378
api.InputEvent.inputType πŸ“‹Chrome7/25/2017 Firefox3/19/2019602
api.MediaDevices.getDisplayMedia πŸ“‹Chrome1/29/2019 Firefox3/19/201949
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.Window.event πŸ“‹Chrome12/11/2008 Firefox3/19/20193750
css.properties.block-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.block-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.height.max-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.height.min-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.inline-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.inline-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.max-block-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.max-block-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.max-height.max-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.max-height.min-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.max-inline-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.max-inline-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.max-width.max-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.max-width.min-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.min-block-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.min-block-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.min-height.max-content Chrome10/13/2015 Firefox3/19/20191253
css.properties.min-height.min-content Chrome10/13/2015 Firefox3/19/20191253
css.properties.min-inline-size.max-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.min-inline-size.min-content Chrome3/9/2017 Firefox3/19/2019740
css.properties.min-width.max-content Chrome10/13/2015 Firefox3/19/20191253
css.properties.min-width.min-content Chrome10/13/2015 Firefox3/19/20191253
css.properties.overflow-anchor πŸ“‹Chrome1/25/2017 Firefox3/19/2019783
css.properties.overflow-anchor.auto πŸ“‹Chrome1/25/2017 Firefox3/19/2019783
css.properties.overflow-anchor.none πŸ“‹Chrome1/25/2017 Firefox3/19/2019783
css.properties.width.max-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
css.properties.width.min-content πŸ“‹Chrome10/13/2015 Firefox3/19/20191253
api.DOMMatrixReadOnly.scaleNonUniform πŸ“‹Firefox10/14/2014 Chrome3/12/20191610
api.GamepadButton.touched πŸ“‹Firefox8/8/2017 Chrome3/12/2019581
api.RTCRtpReceiver.getContributingSources.audioLevel πŸ“‹Firefox3/13/2018 Chrome3/12/2019364
api.RTCRtpReceiver.getSynchronizationSources πŸ“‹Firefox3/13/2018 Chrome3/12/2019364
api.RTCRtpReceiver.getSynchronizationSources.audio_tracks_supported Firefox3/13/2018 Chrome3/12/2019364
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_hourCycle_parameter Firefox1/23/2018 Chrome3/12/2019413
javascript.builtins.Object.fromEntries πŸ“‹Firefox10/23/2018 Chrome3/12/2019140
javascript.builtins.RegExp.source.escaping Firefox5/12/2015 Chrome3/12/20191400
javascript.builtins.RegExp.toString.escaping Firefox5/12/2015 Chrome3/12/20191400

2019/1

API First Browser Date Last Browser Date Days Notes
api.ByteLengthQueuingStrategy πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
Node.js: Available as a part of the stream/web module.
api.ByteLengthQueuingStrategy.ByteLengthQueuingStrategy πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ByteLengthQueuingStrategy.highWaterMark πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ByteLengthQueuingStrategy.size πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.CountQueuingStrategy πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
Node.js: Available as a part of the stream/web module.
api.CountQueuingStrategy.CountQueuingStrategy πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.CountQueuingStrategy.highWaterMark πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.CountQueuingStrategy.size πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.DeprecationReportBody πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
Firefox: Not supported in workers
api.DeprecationReportBody.anticipatedRemoval πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.DeprecationReportBody.columnNumber πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.DeprecationReportBody.id πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.DeprecationReportBody.lineNumber πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.DeprecationReportBody.message πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.DeprecationReportBody.sourceFile πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.FetchEvent.resultingClientId πŸ“‹Chrome1/29/2019 Firefox1/29/2019
api.HTMLMarqueeElement πŸ“‹Chrome12/11/2008 Firefox1/29/20193701
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“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.bgColor πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.direction πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.height πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.hspace πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.loop πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.scrollAmount πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.scrollDelay πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.start πŸ“‹Chrome12/11/2008 Firefox1/29/20193701
api.HTMLMarqueeElement.stop πŸ“‹Chrome12/11/2008 Firefox1/29/20193701
api.HTMLMarqueeElement.trueSpeed πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.vspace πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLMarqueeElement.width πŸ“‹Chrome3/8/2011 Firefox1/29/20192884
api.HTMLScriptElement.referrerPolicy πŸ“‹Chrome10/16/2018 Firefox1/29/2019105
api.MediaRecorder.pause_event πŸ“‹Chrome3/2/2016 Firefox1/29/20191063
api.MediaRecorder.resume_event πŸ“‹Chrome3/2/2016 Firefox1/29/20191063
api.ReadableStream πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
Node.js: Available as a part of the stream/web module.
api.ReadableStream.ReadableStream πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStream.cancel πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.ReadableStream.getReader πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.ReadableStream.locked πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStream.tee πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
Node.js: Before 18.10.0 or 16.18.0, teeing a readable byte stream is not supported.
api.ReadableStreamDefaultController πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
Deno: ReadableStreamDefaultController is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.ReadableStreamDefaultController.close πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStreamDefaultController.desiredSize πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStreamDefaultController.enqueue πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStreamDefaultController.error πŸ“‹Chrome7/20/2016 Firefox1/29/2019923
api.ReadableStreamDefaultReader πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
Deno: ReadableStreamDefaultReader is not exposed on the global scope.Node.js: Available as a part of the stream/web module.
api.ReadableStreamDefaultReader.cancel πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.ReadableStreamDefaultReader.closed πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.ReadableStreamDefaultReader.read πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.ReadableStreamDefaultReader.releaseLock πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.Report πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
Firefox: Worker support added in version 77
api.Report.body πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.Report.type πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.Report.url πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportBody πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportingObserver πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportingObserver.ReportingObserver πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportingObserver.disconnect πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportingObserver.observe πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.ReportingObserver.takeRecords πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
api.Request.Request.response_body_readablestream Chrome5/19/2015 Firefox1/29/20191351
api.Request.credentials.default_same-origin Firefox6/26/2018 Chrome1/29/2019217
api.Response.body πŸ“‹Chrome5/19/2015 Firefox1/29/20191351
api.Window.open.once_per_event Chrome11/6/2012 Firefox1/29/20192275
api.createImageBitmap.svgimageelement_as_source_image Chrome6/5/2017 Firefox1/29/2019603
css.properties.break-after πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.auto Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.left Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.multicol_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322.
css.properties.break-after.page Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.paged_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.paged_context.page Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-after.right Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.auto Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.left Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.multicol_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
Firefox: Only supported in print mode. See bug 1675322.Firefox for Android: Only supported in print mode. See bug 1675322.
css.properties.break-before.page Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.paged_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.paged_context.page Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-before.right Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-inside πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-inside.auto Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-inside.avoid Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-inside.multicol_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.break-inside.paged_context πŸ“‹Chrome4/13/2016 Firefox1/29/20191021
css.properties.image-rendering.crisp-edges πŸ“‹Chrome8/2/2011 Firefox1/29/20192737
css.types.env πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
css.types.env.safe-area-inset-bottom πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
css.types.env.safe-area-inset-left πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
css.types.env.safe-area-inset-right πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
css.types.env.safe-area-inset-top πŸ“‹Chrome9/4/2018 Firefox1/29/2019147
html.elements.marquee πŸ“‹Chrome12/11/2008 Firefox1/29/20193701
Firefox: Implements the HTMLDivElement interface.Firefox for Android: Implements the HTMLDivElement interface.
html.elements.script.referrerpolicy πŸ“‹Chrome10/16/2018 Firefox1/29/2019105
javascript.builtins.Intl.RelativeTimeFormat πŸ“‹Chrome12/4/2018 Firefox1/29/201956
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“‹Chrome12/4/2018 Firefox1/29/201956
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.locales_parameter Chrome12/4/2018 Firefox1/29/201956
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 Chrome12/4/2018 Firefox1/29/201956
javascript.builtins.Intl.RelativeTimeFormat.RelativeTimeFormat.options_parameter.options_numeric_parameter Chrome12/4/2018 Firefox1/29/201956
javascript.builtins.Intl.RelativeTimeFormat.format πŸ“‹Chrome12/4/2018 Firefox1/29/201956
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“‹Chrome12/4/2018 Firefox1/29/201956
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“‹Chrome12/4/2018 Firefox1/29/201956
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.JSON.stringify.well_formed_stringify Firefox12/11/2018 Chrome1/29/201949
javascript.builtins.globalThis πŸ“‹Chrome12/4/2018 Firefox1/29/201956

2018/12

API First Browser Date Last Browser Date Days Notes
api.Document.exitFullscreen πŸ“‹Chrome12/4/2018 Firefox12/11/20187
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 Chrome9/4/2018 Firefox12/11/201898
api.Document.fullscreen πŸ“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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“‹Chrome12/4/2018 Firefox12/11/20187
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 Chrome12/4/2018 Firefox12/11/20187
api.RTCRtpSender.setParameters πŸ“‹Chrome7/24/2018 Firefox12/11/2018140
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.ShadowRoot.fullscreenElement πŸ“‹Chrome12/4/2018 Firefox12/11/20187
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.Window.screenLeft πŸ“‹Chrome12/11/2008 Firefox12/11/20183652
api.Window.screenTop πŸ“‹Chrome12/11/2008 Firefox12/11/20183652
api.XMLHttpRequest.getAllResponseHeaders.header_names_lowercase Chrome7/25/2017 Firefox12/11/2018504
css.at-rules.media.any-hover πŸ“‹Chrome3/3/2015 Firefox12/11/20181379
css.at-rules.media.any-pointer πŸ“‹Chrome3/3/2015 Firefox12/11/20181379
css.at-rules.media.hover πŸ“‹Chrome10/7/2014 Firefox12/11/20181526
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“‹Chrome3/3/2015 Firefox12/11/20181379
css.properties.display.list-item.legend-support Chrome12/4/2018 Firefox12/11/20187
css.selectors.fullscreen πŸ“‹Chrome12/4/2018 Firefox12/11/20187
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.
css.types.gradient.linear-gradient.doubleposition Chrome12/4/2018 Firefox12/11/20187
css.types.gradient.radial-gradient.doubleposition Chrome12/4/2018 Firefox12/11/20187
css.types.gradient.repeating-linear-gradient.doubleposition Chrome12/4/2018 Firefox12/11/20187
css.types.gradient.repeating-radial-gradient.doubleposition Chrome12/4/2018 Firefox12/11/20187
api.Permissions.permission_persistent-storage Firefox4/19/2017 Chrome12/4/2018594
api.SpeechSynthesisErrorEvent.SpeechSynthesisErrorEvent πŸ“‹Firefox9/20/2016 Chrome12/4/2018805
api.SpeechSynthesisEvent.SpeechSynthesisEvent πŸ“‹Firefox9/20/2016 Chrome12/4/2018805
api.URL.toJSON πŸ“‹Firefox6/13/2017 Chrome12/4/2018539
api.console.timeLog_static πŸ“‹Firefox9/5/2018 Chrome12/4/201890

2018/10

API First Browser Date Last Browser Date Days Notes
api.Clipboard πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
api.Clipboard.writeText πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
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.CustomElementRegistry πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
api.CustomElementRegistry.builtin_element_support Chrome5/29/2018 Firefox10/23/2018147
api.CustomElementRegistry.define πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
api.CustomElementRegistry.get πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
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.upgrade πŸ“‹Chrome7/24/2018 Firefox10/23/201891
api.CustomElementRegistry.whenDefined πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
api.Element.assignedSlot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.Element.attachShadow πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.Element.securitypolicyviolation_event πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.Element.shadowRoot πŸ“‹Chrome5/20/2014 Firefox10/23/20181617
api.Element.slot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.Element.toggleAttribute πŸ“‹Chrome9/4/2018 Firefox10/23/201849
api.HTMLImageElement.decoding πŸ“‹Chrome3/6/2018 Firefox10/23/2018231
api.HTMLSlotElement πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.HTMLSlotElement.assignedNodes πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.HTMLSlotElement.name πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.HTMLSlotElement.slotchange_event πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
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.MediaCapabilities πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
api.MediaCapabilities.decodingInfo πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
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.Navigator.clipboard πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
api.Navigator.mediaCapabilities πŸ“‹Chrome4/17/2018 Firefox10/23/2018189
api.RTCDataChannel.sctp_sdp_21 Chrome4/19/2017 Firefox10/23/2018552
api.SVGImageElement.decoding πŸ“‹Chrome3/6/2018 Firefox10/23/2018231
api.SecurityPolicyViolationEvent πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.SecurityPolicyViolationEvent πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.blockedURI πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.columnNumber πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.disposition πŸ“‹Chrome1/25/2017 Firefox10/23/2018636
api.SecurityPolicyViolationEvent.documentURI πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.effectiveDirective πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.lineNumber πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.originalPolicy πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.referrer πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.sample πŸ“‹Chrome6/5/2017 Firefox10/23/2018505
api.SecurityPolicyViolationEvent.sourceFile πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.statusCode πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.violatedDirective πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
api.SecurityPolicyViolationEvent.worker_support Chrome1/25/2017 Firefox10/23/2018636
api.ShadowRoot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.activeElement πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.elementFromPoint Chrome8/31/2016 Firefox10/23/2018783
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 Chrome8/31/2016 Firefox10/23/2018783
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“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.innerHTML πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.mode πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.pointerLockElement πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.ShadowRoot.styleSheets πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.SourceBuffer.changeType πŸ“‹Chrome10/16/2018 Firefox10/23/20187
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.Text.assignedSlot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
api.TextDecoder.ignoreBOM πŸ“‹Chrome10/7/2014 Firefox10/23/20181477
api.Window.customElements πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
api.WorkerGlobalScope.securitypolicyviolation_event πŸ“‹Chrome3/3/2015 Firefox10/23/20181330
css.at-rules.media.-webkit-device-pixel-ratio πŸ“‹Chrome12/11/2008 Firefox10/23/20183603
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“‹Chrome12/11/2008 Firefox10/23/20183603
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“‹Chrome12/11/2008 Firefox10/23/20183603
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.properties.content.element_replacement Chrome7/9/2013 Firefox10/23/20181932
css.selectors.defined πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
css.selectors.host πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
css.selectors.hostfunction πŸ“‹Chrome10/12/2016 Firefox10/23/2018741
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“‹Chrome4/13/2016 Firefox10/23/2018923
html.elements.img.decoding πŸ“‹Chrome3/6/2018 Firefox10/23/2018231
html.elements.slot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
html.elements.slot.name Chrome8/31/2016 Firefox10/23/2018783
html.global_attributes.is πŸ“‹Chrome5/29/2018 Firefox10/23/2018147
html.global_attributes.slot πŸ“‹Chrome8/31/2016 Firefox10/23/2018783
http.headers.Clear-Site-Data πŸ“‹Chrome9/5/2017 Firefox10/23/2018413
http.headers.Clear-Site-Data.cookies πŸ“‹Chrome9/5/2017 Firefox10/23/2018413
http.headers.Clear-Site-Data.secure_context_required Chrome9/5/2017 Firefox10/23/2018413
http.headers.Clear-Site-Data.storage πŸ“‹Chrome9/5/2017 Firefox10/23/2018413
http.headers.Content-Security-Policy.report-sample Chrome6/5/2017 Firefox10/23/2018505
javascript.builtins.Symbol.description πŸ“‹Chrome10/16/2018 Firefox10/23/20187
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.
api.DedicatedWorkerGlobalScope.name πŸ“‹Firefox8/8/2017 Chrome10/16/2018434
api.RTCPeerConnection.currentLocalDescription πŸ“‹Firefox6/25/2013 Chrome10/16/20181939
api.RTCPeerConnection.currentRemoteDescription πŸ“‹Firefox11/14/2017 Chrome10/16/2018336
api.RTCPeerConnection.getConfiguration πŸ“‹Firefox6/25/2013 Chrome10/16/20181939
api.RTCPeerConnection.pendingLocalDescription πŸ“‹Firefox6/25/2013 Chrome10/16/20181939
api.RTCPeerConnection.pendingRemoteDescription πŸ“‹Firefox6/25/2013 Chrome10/16/20181939
api.SharedWorker.SharedWorker.options_name_parameter Firefox8/8/2017 Chrome10/16/2018434
api.Worker.Worker.options_name_parameter Firefox8/8/2017 Chrome10/16/2018434
javascript.builtins.Array.sort.stable_sorting Firefox6/17/2008 Chrome10/16/20183773

2018/9

API First Browser Date Last Browser Date Days Notes
api.DOMMatrixReadOnly.DOMMatrixReadOnly πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMMatrixReadOnly.toJSON πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMPoint.fromPoint_static πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMPointReadOnly.DOMPointReadOnly πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMPointReadOnly.fromPoint_static πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMPointReadOnly.toJSON πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMQuad.getBounds πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMQuad.toJSON πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMRectReadOnly.DOMRectReadOnly πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DOMRectReadOnly.toJSON πŸ“‹Chrome9/5/2017 Firefox9/5/2018365
api.DataTransfer.DataTransfer πŸ“‹Chrome6/5/2017 Firefox9/5/2018457
api.Event.srcElement πŸ“‹Chrome12/11/2008 Firefox9/5/20183555
api.RTCDataChannel.maxPacketLifeTime πŸ“‹Chrome1/25/2017 Firefox9/5/2018588
api.RTCDataChannel.maxRetransmits πŸ“‹Chrome10/1/2013 Firefox9/5/20181800
api.console.countReset_static πŸ“‹Chrome7/24/2018 Firefox9/5/201843
css.at-rules.font-face.font-stretch πŸ“‹Chrome10/17/2017 Firefox9/5/2018323
css.at-rules.font-face.src.format_variations Chrome4/17/2018 Firefox9/5/2018141
css.properties.font-variation-settings πŸ“‹Chrome10/17/2017 Firefox9/5/2018323
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“‹Chrome10/17/2017 Firefox9/5/2018323
css.properties.shape-image-threshold πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-margin πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.border-box πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.circle Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.content-box πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.gradient πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.image πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.inset Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.margin-box πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.none πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.padding-box πŸ“‹Chrome8/26/2014 Firefox9/5/20181471
css.properties.shape-outside.polygon Chrome8/26/2014 Firefox9/5/20181471
css.selectors.selection πŸ“‹Chrome12/11/2008 Firefox9/5/20183555
css.types.resolution.x Chrome7/24/2018 Firefox9/5/201843
javascript.builtins.Array.flat πŸ“‹Chrome9/4/2018 Firefox9/5/20181
javascript.builtins.Array.flatMap πŸ“‹Chrome9/4/2018 Firefox9/5/20181
javascript.builtins.JSON.json_superset Chrome4/17/2018 Firefox9/5/2018141
javascript.operators.import_meta πŸ“‹Chrome1/23/2018 Firefox9/5/2018225
webassembly.api.Global πŸ“‹Chrome9/4/2018 Firefox9/5/20181
webassembly.api.Global.Global πŸ“‹Chrome9/4/2018 Firefox9/5/20181
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“‹Chrome9/4/2018 Firefox9/5/20181
webassembly.api.Global.valueOf πŸ“‹Chrome9/4/2018 Firefox9/5/20181
webassembly.mutable-globals πŸ“‹Chrome9/4/2018 Firefox9/5/20181
webassembly.sign-extension-operations πŸ“‹Chrome9/4/2018 Firefox9/5/20181
api.RTCPeerConnection.addTransceiver πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCPeerConnection.addTransceiver.init_direction_parameter Firefox3/13/2018 Chrome9/4/2018175
api.RTCPeerConnection.addTransceiver.init_streams_parameter Firefox3/13/2018 Chrome9/4/2018175
api.RTCPeerConnection.getTransceivers πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpSender.getParameters.return_object_property_encodings πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
api.RTCRtpSender.getParameters.return_object_property_headerExtensions πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpSender.getParameters.return_object_property_rtcp πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpSender.setParameters.parameters_encodings_parameter πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
api.RTCRtpSender.setParameters.parameters_encodings_parameter.maxBitrate πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
api.RTCRtpSender.setParameters.parameters_encodings_parameter.priority πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
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_headerExtensions_parameter πŸ“‹Firefox4/26/2016 Chrome9/4/2018861
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 Chrome9/4/2018861
Firefox: The property is defined but not implemented/used.Firefox for Android: The property is defined but not implemented/used.
api.RTCRtpTransceiver πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.currentDirection πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.direction πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.mid πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.receiver πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.sender πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.RTCRtpTransceiver.stopped Firefox3/13/2018 Chrome9/4/2018175
api.RTCTrackEvent.transceiver πŸ“‹Firefox3/13/2018 Chrome9/4/2018175
api.Request.Request.cross_origin_stripped Firefox6/13/2017 Chrome9/4/2018448
api.Worker.worker_support Firefox12/1/2014 Chrome9/4/20181373
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.
css.properties.border-block-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-color πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-color.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-color.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-style.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-width πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-width.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-width.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-end-width.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-color πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-color.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-color.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-style.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-width πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-width.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-width.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-block-start-width.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-color πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-color.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-color.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-style.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-width πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-width.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-width.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-end-width.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-color πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-color.currentColor πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-color.transparent πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.dashed πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.dotted πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.double πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.groove πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.hidden πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.inset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.none πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.outset πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.ridge πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-style.solid πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-width πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-width.medium πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-width.thick πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.border-inline-start-width.thin πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-block-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-block-end.auto πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-block-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-block-start.auto πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-inline-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-inline-end.auto πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-inline-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.margin-inline-start.auto πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.padding-block-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.padding-block-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.padding-inline-end πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.padding-inline-start πŸ“‹Firefox9/22/2015 Chrome9/4/20181078
css.properties.scroll-snap-type.none πŸ“‹Firefox7/2/2015 Chrome9/4/20181160
css.selectors.backdrop.fullscreen Firefox6/7/2016 Chrome9/4/2018819

2018/7

API First Browser Date Last Browser Date Days Notes
api.AnimationEvent.pseudoElement πŸ“‹Firefox8/6/2013 Chrome7/24/20181813
api.CanvasPattern.setTransform πŸ“‹Firefox10/14/2014 Chrome7/24/20181379
api.GamepadHapticActuator πŸ“‹Firefox8/8/2017 Chrome7/24/2018350
api.GamepadHapticActuator.type Firefox8/8/2017 Chrome7/24/2018350
api.Path2D.addPath πŸ“‹Firefox12/1/2014 Chrome7/24/20181331
api.RTCRtpSender.getParameters πŸ“‹Firefox4/26/2016 Chrome7/24/2018819
api.ServiceWorkerRegistration.updateViaCache πŸ“‹Firefox11/14/2017 Chrome7/24/2018252
css.properties.cursor.grab Firefox2/4/2014 Chrome7/24/20181631
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 Chrome7/24/20181631
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.overflow.multiple_keywords Firefox6/26/2018 Chrome7/24/201828
html.elements.iframe.sandbox.allow-orientation-lock πŸ“‹Firefox9/20/2016 Chrome7/24/2018672

2018/6

API First Browser Date Last Browser Date Days Notes
api.DOMTokenList.replace.boolean_value Chrome5/29/2018 Firefox6/26/201828
api.Document.anchors πŸ“‹Chrome12/11/2008 Firefox6/26/20183484
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“‹Chrome12/11/2008 Firefox6/26/20183484
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“‹Chrome7/16/2014 Firefox6/26/20181441
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“‹Chrome12/11/2008 Firefox6/26/20183484
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“‹Chrome1/25/2010 Firefox6/26/20183074
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.Document.images πŸ“‹Chrome12/11/2008 Firefox6/26/20183484
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“‹Chrome12/11/2008 Firefox6/26/20183484
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“‹Chrome7/16/2014 Firefox6/26/20181441
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“‹Chrome7/16/2014 Firefox6/26/20181441
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 Chrome12/1/2016 Firefox6/26/2018572
api.PerformanceResourceTiming.serverTiming πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.PerformanceServerTiming πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.PerformanceServerTiming.description πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.PerformanceServerTiming.duration πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.PerformanceServerTiming.name πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.PerformanceServerTiming.toJSON πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.Request.destination πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
api.SVGGeometryElement.getPointAtLength πŸ“‹Chrome1/25/2017 Firefox6/26/2018517
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“‹Chrome1/25/2017 Firefox6/26/2018517
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“‹Chrome3/9/2017 Firefox6/26/2018474
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.
css.properties.column-gap.grid_context πŸ“‹Chrome4/17/2018 Firefox6/26/201870
css.properties.column-gap.multicol_context.calc_values Chrome4/17/2018 Firefox6/26/201870
css.properties.column-gap.multicol_context.percentage_values Chrome4/17/2018 Firefox6/26/201870
css.properties.font-stretch.percentage Chrome10/17/2017 Firefox6/26/2018252
css.properties.font-style.oblique-angle πŸ“‹Chrome10/17/2017 Firefox6/26/2018252
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 Chrome10/17/2017 Firefox6/26/2018252
css.properties.gap.grid_context πŸ“‹Chrome4/17/2018 Firefox6/26/201870
css.properties.gap.multicol_context πŸ“‹Chrome4/17/2018 Firefox6/26/201870
css.properties.row-gap.grid_context πŸ“‹Chrome4/17/2018 Firefox6/26/201870
http.headers.Server-Timing πŸ“‹Chrome3/6/2018 Firefox6/26/2018112
javascript.builtins.String.trimEnd πŸ“‹Chrome4/17/2018 Firefox6/26/201870
javascript.builtins.String.trimStart πŸ“‹Chrome4/17/2018 Firefox6/26/201870

2018/5

API First Browser Date Last Browser Date Days Notes
api.AuthenticatorAssertionResponse πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.authenticatorData πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.signature πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAssertionResponse.userHandle πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAttestationResponse πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorAttestationResponse.attestationObject πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorResponse πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.AuthenticatorResponse.clientDataJSON πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.CredentialsContainer.create.publicKey_option πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.create.publicKey_option.attestation πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.create.publicKey_option.attestation.direct πŸ“‹Firefox5/9/2018 Chrome5/29/201820
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 Chrome5/29/201820
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 Chrome5/29/201820
api.CredentialsContainer.create.publicKey_option.attestation.none πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.create.publicKey_option.extensions πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.create.publicKey_option.extensions.appidExclude πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.get.publicKey_option πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.get.publicKey_option.extensions πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.CredentialsContainer.get.publicKey_option.extensions.appid πŸ“‹Firefox5/9/2018 Chrome5/29/201820
api.MediaDevices.getSupportedConstraints.return_object_property_autoGainControl πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
api.MediaDevices.getSupportedConstraints.return_object_property_noiseSuppression πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
api.MediaStreamTrack.applyConstraints.autoGainControl_constraint πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
api.MediaStreamTrack.applyConstraints.noiseSuppression_constraint πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
api.PublicKeyCredential πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.getClientExtensionResults πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable_static πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.rawId πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.PublicKeyCredential.response πŸ“‹Firefox5/9/2018 Chrome5/29/201820
Firefox: Only supports USB U2F tokens.Firefox for Android: Only supports USB U2F tokens.
api.RTCPeerConnection.getStats.selector_parameter Firefox2/4/2014 Chrome5/29/20181575
api.RTCRtpReceiver.getStats πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
api.RTCRtpSender.getStats πŸ“‹Firefox8/8/2017 Chrome5/29/2018294
http.headers.Set-Cookie.SameSite.None Firefox5/9/2018 Chrome5/29/201820
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.
api.Credential πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.Credential.id πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.Credential.type πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.CredentialsContainer πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.CredentialsContainer.create πŸ“‹Chrome7/25/2017 Firefox5/9/2018288
api.CredentialsContainer.get πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.CredentialsContainer.preventSilentAccess πŸ“‹Chrome7/25/2017 Firefox5/9/2018288
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.CredentialsContainer.store πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.Document.body πŸ“‹Chrome12/11/2008 Firefox5/9/20183436
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.HTMLScriptElement.noModule πŸ“‹Chrome9/5/2017 Firefox5/9/2018246
api.Navigator.credentials πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
api.Navigator.webdriver πŸ“‹Chrome12/6/2017 Firefox5/9/2018154
api.PerformanceEntry.worker_support Chrome10/17/2017 Firefox5/9/2018204
Node.js: Available as a part of the perf_hooks module.
api.PerformanceObserver.takeRecords πŸ“‹Chrome3/6/2018 Firefox5/9/201864
api.PerformanceResourceTiming.worker_support Chrome5/19/2015 Firefox5/9/20181086
css.properties.paint-order.fill πŸ“‹Chrome5/20/2014 Firefox5/9/20181450
css.properties.paint-order.markers πŸ“‹Chrome5/20/2014 Firefox5/9/20181450
css.properties.paint-order.normal πŸ“‹Chrome5/20/2014 Firefox5/9/20181450
css.properties.paint-order.stroke πŸ“‹Chrome5/20/2014 Firefox5/9/20181450
html.elements.script.nomodule πŸ“‹Chrome9/5/2017 Firefox5/9/2018246
html.elements.script.type.module Chrome9/5/2017 Firefox5/9/2018246
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).
http.headers.Set-Cookie.SameSite πŸ“‹Chrome5/25/2016 Firefox5/9/2018714
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.Lax Chrome5/25/2016 Firefox5/9/2018714
http.headers.Set-Cookie.SameSite.Strict Chrome5/25/2016 Firefox5/9/2018714
javascript.builtins.Array.values πŸ“‹Chrome4/17/2018 Firefox5/9/201822
javascript.statements.export πŸ“‹Chrome9/5/2017 Firefox5/9/2018246
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“‹Chrome9/5/2017 Firefox5/9/2018246
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“‹Chrome9/5/2017 Firefox5/9/2018246
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.AbortController πŸ“‹Firefox11/14/2017 Chrome4/17/2018154
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 Chrome4/17/2018154
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 Chrome4/17/2018154
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 Chrome4/17/2018154
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.AbortSignal πŸ“‹Firefox11/14/2017 Chrome4/17/2018154
api.AbortSignal.abort_event πŸ“‹Firefox11/14/2017 Chrome4/17/2018154
api.AbortSignal.aborted πŸ“‹Firefox11/14/2017 Chrome4/17/2018154
api.FetchEvent.respondWith.networkerror_on_same-origin_cors Firefox3/13/2018 Chrome4/17/201835
api.HTMLCanvasElement.getContext.bitmaprenderer_context Firefox4/26/2016 Chrome4/17/2018721
api.HTMLSelectElement.autocomplete πŸ“‹Firefox3/13/2018 Chrome4/17/201835
api.HTMLTextAreaElement.autocomplete πŸ“‹Firefox3/13/2018 Chrome4/17/201835
api.ImageBitmapRenderingContext πŸ“‹Firefox4/26/2016 Chrome4/17/2018721
api.ImageBitmapRenderingContext.transferFromImageBitmap πŸ“‹Firefox11/15/2016 Chrome4/17/2018518
api.RTCRtpSender.dtmf πŸ“‹Firefox3/7/2017 Chrome4/17/2018406
api.Request.signal πŸ“‹Firefox11/14/2017 Chrome4/17/2018154
api.fetch.init_signal_parameter Firefox11/14/2017 Chrome4/17/2018154
css.at-rules.media.calc πŸ“‹Firefox3/13/2018 Chrome4/17/201835
css.at-rules.media.media_query_values Firefox3/13/2018 Chrome4/17/201835
css.properties.gap.grid_context.calc_values Firefox3/7/2017 Chrome4/17/2018406
css.properties.gap.grid_context.percentage_values Firefox3/7/2017 Chrome4/17/2018406
css.types.color.rgb.float_values Firefox3/7/2017 Chrome4/17/2018406
html.elements.select.autocomplete πŸ“‹Firefox3/13/2018 Chrome4/17/201835
html.elements.textarea.autocomplete πŸ“‹Firefox3/13/2018 Chrome4/17/201835
javascript.builtins.Function.toString.toString_revision Firefox6/13/2017 Chrome4/17/2018308
javascript.statements.try_catch.optional_catch_binding Firefox1/23/2018 Chrome4/17/201884

2018/3

API First Browser Date Last Browser Date Days Notes
api.CSSNamespaceRule.namespaceURI πŸ“‹Chrome12/1/2015 Firefox3/13/2018833
api.CSSNamespaceRule.prefix πŸ“‹Chrome12/1/2015 Firefox3/13/2018833
api.DOMMatrixReadOnly.isIdentity πŸ“‹Chrome9/5/2017 Firefox3/13/2018189
api.Element.gotpointercapture_event πŸ“‹Chrome3/9/2017 Firefox3/13/2018369
api.Element.hasPointerCapture πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.lostpointercapture_event πŸ“‹Chrome3/9/2017 Firefox3/13/2018369
api.Element.pointercancel_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerdown_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerenter_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerleave_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointermove_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerout_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerover_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.pointerup_event πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.releasePointerCapture πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.Element.setPointerCapture πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
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.Event.composedPath πŸ“‹Chrome8/31/2016 Firefox3/13/2018559
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.EventTarget.EventTarget πŸ“‹Chrome1/23/2018 Firefox3/13/201849
api.MediaStreamTrack.mute_event πŸ“‹Chrome3/26/2013 Firefox3/13/20181813
api.MediaStreamTrack.muted πŸ“‹Chrome10/7/2014 Firefox3/13/20181253
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“‹Chrome3/26/2013 Firefox3/13/20181813
api.MouseEvent.relatedTarget.drag_events πŸ“‹Chrome7/25/2017 Firefox3/13/2018231
api.Navigator.maxTouchPoints πŸ“‹Chrome5/20/2014 Firefox3/13/20181393
api.PointerEvent πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: See MSDN Pointer events updates.
api.PointerEvent.PointerEvent πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: See MSDN Pointer events updates.
api.PointerEvent.getCoalescedEvents πŸ“‹Chrome4/19/2017 Firefox3/13/2018328
Firefox for Android: The method always returns an empty array, regardless of the user's actions.
api.PointerEvent.height πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: Returns values in screen pixels instead of CSS document pixels.
api.PointerEvent.isPrimary πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.PointerEvent.pointerId πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.PointerEvent.pointerType πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: Returns an integer enumeration instead of a string.
api.PointerEvent.pressure πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: Returns 0 instead of 0.5 on hardware that doesn't support pressure.
api.PointerEvent.tangentialPressure πŸ“‹Chrome3/9/2017 Firefox3/13/2018369
api.PointerEvent.tiltX πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.PointerEvent.tiltY πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
api.PointerEvent.twist πŸ“‹Chrome3/9/2017 Firefox3/13/2018369
api.PointerEvent.width πŸ“‹Chrome12/1/2016 Firefox3/13/2018467
Internet Explorer: Returns values in screen pixels instead of CSS document pixels.
api.RTCRtpReceiver.getContributingSources πŸ“‹Chrome6/5/2017 Firefox3/13/2018281
api.RTCRtpReceiver.getContributingSources.audio_tracks_supported Chrome6/5/2017 Firefox3/13/2018281
api.RTCRtpReceiver.getContributingSources.source πŸ“‹Chrome6/5/2017 Firefox3/13/2018281
api.RTCRtpReceiver.getContributingSources.timestamp πŸ“‹Chrome6/5/2017 Firefox3/13/2018281
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.Response.Response.body_parameter_optional Chrome1/21/2015 Firefox3/13/20181147
css.properties.display.contents.contents_unusual πŸ“‹Chrome3/6/2018 Firefox3/13/20187
css.properties.overscroll-behavior πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior.auto πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior.contain πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior.none πŸ“‹Chrome12/6/2017 Firefox3/13/201897
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.overscroll-behavior-x πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-x.auto πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-x.contain πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-x.none πŸ“‹Chrome12/6/2017 Firefox3/13/201897
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.overscroll-behavior-y πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-y.auto πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-y.contain πŸ“‹Chrome12/6/2017 Firefox3/13/201897
css.properties.overscroll-behavior-y.none πŸ“‹Chrome12/6/2017 Firefox3/13/201897
Edge: The none value incorrectly behaves as contain (allowing for the elastic bounce effect).
css.properties.position.position_sticky_table_elements Chrome1/25/2017 Firefox3/13/2018412
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 Chrome12/1/2015 Firefox3/13/2018833
html.elements.textarea.placeholder.line_breaks Chrome7/16/2014 Firefox3/13/20181336
http.data-url.top_level_navigation_blocked Chrome7/25/2017 Firefox3/13/2018231
api.CacheStorage.secure_context_required Firefox1/26/2016 Chrome3/6/2018770
api.HTMLAnchorElement.relList πŸ“‹Firefox6/10/2014 Chrome3/6/20181365
api.HTMLAreaElement.relList πŸ“‹Firefox6/10/2014 Chrome3/6/20181365
api.RTCRtpSender.replaceTrack πŸ“‹Firefox12/1/2014 Chrome3/6/20181191
css.properties.display.contents πŸ“‹Firefox3/31/2015 Chrome3/6/20181071
css.selectors.any-link πŸ“‹Firefox11/15/2016 Chrome3/6/2018476
css.types.color.hsl.alpha_parameter Firefox3/7/2017 Chrome3/6/2018364
css.types.color.hsl.space_separated_parameters Firefox3/7/2017 Chrome3/6/2018364
css.types.color.rgb.alpha_parameter Firefox3/7/2017 Chrome3/6/2018364
css.types.color.rgb.space_separated_parameters Firefox3/7/2017 Chrome3/6/2018364
html.elements.td.rowspan.rowspan_zero Firefox8/8/2017 Chrome3/6/2018210

2018/1

API First Browser Date Last Browser Date Days Notes
api.Document.getElementsByName πŸ“‹Chrome12/11/2008 Firefox1/23/20183330
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“‹Chrome1/21/2015 Firefox1/23/20181098
Firefox: Not supported on Windows.
api.Element.scrollIntoView.options_parameter.block_option πŸ“‹Chrome9/5/2017 Firefox1/23/2018140
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“‹Chrome9/5/2017 Firefox1/23/2018140
api.FontFace.display πŸ“‹Chrome7/25/2017 Firefox1/23/2018182
api.IDBRequest.error.DOMException Chrome1/20/2016 Firefox1/23/2018734
api.IDBTransaction.error.DOMException Chrome1/20/2016 Firefox1/23/2018734
api.PerformanceNavigationTiming πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.domComplete πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.domContentLoadedEventEnd πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.domContentLoadedEventStart πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.domInteractive πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.loadEventEnd πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.loadEventStart πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.redirectCount πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.toJSON πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.type πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.unloadEventEnd πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceNavigationTiming.unloadEventStart πŸ“‹Chrome3/9/2017 Firefox1/23/2018320
api.PerformanceResourceTiming.workerStart πŸ“‹Chrome10/13/2015 Firefox1/23/2018833
api.RTCPeerConnection.addTrack πŸ“‹Firefox6/25/2013 Chrome1/23/20181673
api.RTCPeerConnection.getSenders πŸ“‹Firefox12/1/2014 Chrome1/23/20181149
api.RTCPeerConnection.removeTrack πŸ“‹Firefox6/25/2013 Chrome1/23/20181673
api.RTCPeerConnection.track_event πŸ“‹Firefox6/25/2013 Chrome1/23/20181673
api.RTCRtpSender πŸ“‹Firefox12/1/2014 Chrome1/23/20181149
api.RTCRtpSender.track πŸ“‹Firefox12/1/2014 Chrome1/23/20181149
api.RTCTrackEvent.RTCTrackEvent πŸ“‹Firefox4/26/2016 Chrome1/23/2018637
api.Request.cache πŸ“‹Firefox8/2/2016 Chrome1/23/2018539
api.Request.cache.only-if-cached Firefox11/15/2016 Chrome1/23/2018434
css.at-rules.font-face.font-display πŸ“‹Chrome7/25/2017 Firefox1/23/2018182
css.properties.transform-box πŸ“‹Firefox8/8/2017 Chrome1/23/2018168
css.properties.transform-box.fill-box πŸ“‹Firefox8/8/2017 Chrome1/23/2018168
css.properties.transform-box.view-box πŸ“‹Firefox8/8/2017 Chrome1/23/2018168
html.global_attributes.title.multi-line_titles Chrome1/23/2018 Firefox1/23/2018
http.headers.Content-Security-Policy.frame-ancestors πŸ“‹Chrome1/21/2015 Firefox1/23/20181098
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.
http.headers.Content-Security-Policy.worker-src πŸ“‹Chrome6/5/2017 Firefox1/23/2018232
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.
http.headers.X-Content-Type-Options πŸ“‹Firefox11/15/2016 Chrome1/23/2018434
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.NumberFormat.formatToParts πŸ“‹Chrome1/23/2018 Firefox1/23/2018
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“‹Chrome12/6/2017 Firefox1/23/201848
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“‹Chrome12/6/2017 Firefox1/23/201848
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“‹Chrome12/6/2017 Firefox1/23/201848
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“‹Chrome12/6/2017 Firefox1/23/201848
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“‹Chrome12/6/2017 Firefox1/23/201848
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.Promise.finally πŸ“‹Chrome12/6/2017 Firefox1/23/201848
webassembly.api.compileStreaming_static πŸ“‹Chrome7/25/2017 Firefox1/23/2018182
webassembly.api.instantiateStreaming_static πŸ“‹Chrome7/25/2017 Firefox1/23/2018182

2017/12

API First Browser Date Last Browser Date Days Notes
api.EXT_color_buffer_half_float πŸ“‹Firefox6/7/2016 Chrome12/6/2017547
Firefox: Not supported on Windows.
api.WEBGL_color_buffer_float πŸ“‹Firefox6/10/2014 Chrome12/6/20171275
api.Window.afterprint_event πŸ“‹Firefox8/16/2011 Chrome12/6/20172304
api.Window.beforeprint_event πŸ“‹Firefox8/16/2011 Chrome12/6/20172304
css.properties.font-variant-east-asian πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.full-width πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.jis04 πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.jis78 πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.jis83 πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.jis90 πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.normal πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.proportional-width πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.ruby πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.simplified πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.properties.font-variant-east-asian.traditional πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
css.types.length.Q Firefox9/20/2016 Chrome12/6/2017442
javascript.builtins.AsyncGenerator πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncGenerator.next πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncGenerator.return πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncGenerator.throw πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncGeneratorFunction πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncGeneratorFunction.AsyncGeneratorFunction πŸ“‹Firefox8/8/2017 Chrome12/6/2017120
javascript.builtins.AsyncIterator πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.builtins.AsyncIterator.@@asyncIterator πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.builtins.Proxy.revocable πŸ“‹Firefox12/1/2014 Chrome12/6/20171101
javascript.builtins.Symbol.asyncIterator πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.functions.method_definitions.async_generator_methods Firefox11/14/2017 Chrome12/6/201722
javascript.operators.async_generator_function πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.statements.async_generator_function πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.statements.for_await_of πŸ“‹Firefox11/14/2017 Chrome12/6/201722
javascript.statements.for_of.async_iterators Firefox11/14/2017 Chrome12/6/201722

2017/11

API First Browser Date Last Browser Date Days Notes
api.BroadcastChannel.messageerror_event πŸ“‹Chrome7/25/2017 Firefox11/14/2017112
api.DedicatedWorkerGlobalScope.messageerror_event πŸ“‹Chrome7/25/2017 Firefox11/14/2017112
api.Document.getSelection πŸ“‹Chrome5/21/2009 Firefox11/14/20173099
Firefox: Only supported for HTMLDocument, not all Document objects.Firefox for Android: Only supported for HTMLDocument, not all Document objects.
api.HTMLInputElement.valueAsDate πŸ“‹Chrome5/25/2010 Firefox11/14/20172730
api.Headers.iterate_combined_duplicates Chrome3/9/2017 Firefox11/14/2017250
api.Headers.iterate_lexicographically Chrome3/9/2017 Firefox11/14/2017250
api.KeyboardEvent.initKeyboardEvent πŸ“‹Chrome12/11/2008 Firefox11/14/20173260
api.MessagePort.messageerror_event πŸ“‹Chrome7/25/2017 Firefox11/14/2017112
Node.js: Supports the event, but only via Node EventEmitter.Node.js: Supports the event, but only via Node EventEmitter.
api.Navigator.storage πŸ“‹Chrome12/1/2016 Firefox11/14/2017348
api.OfflineAudioContext.OfflineAudioContext.options_parameter Chrome10/17/2017 Firefox11/14/201728
api.PerformanceObserver πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
Node.js: Available as a part of the perf_hooks module.
api.PerformanceObserver.PerformanceObserver πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
api.PerformanceObserver.disconnect πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
api.PerformanceObserver.observe πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
api.PerformanceObserver.worker_support Chrome10/17/2017 Firefox11/14/201728
api.PerformanceObserverEntryList πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
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“‹Chrome7/20/2016 Firefox11/14/2017482
api.PerformanceObserverEntryList.getEntriesByName πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
api.PerformanceObserverEntryList.getEntriesByType πŸ“‹Chrome7/20/2016 Firefox11/14/2017482
api.Selection.type πŸ“‹Chrome12/11/2008 Firefox11/14/20173260
api.StorageManager πŸ“‹Chrome12/1/2016 Firefox11/14/2017348
api.StorageManager.estimate πŸ“‹Chrome9/5/2017 Firefox11/14/201770
api.StorageManager.persist πŸ“‹Chrome12/1/2016 Firefox11/14/2017348
api.StorageManager.persisted πŸ“‹Chrome12/1/2016 Firefox11/14/2017348
api.Window.messageerror_event πŸ“‹Chrome7/25/2017 Firefox11/14/2017112
api.WorkerNavigator.storage πŸ“‹Chrome12/1/2016 Firefox11/14/2017348
css.at-rules.media.display-mode.minimal-ui πŸ“‹Chrome4/14/2015 Firefox11/14/2017945
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“‹Chrome4/14/2015 Firefox11/14/2017945
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.
html.elements.input.type_date πŸ“‹Chrome6/26/2012 Firefox11/14/20171967
html.elements.input.type_date.disables_invalid_values_in_picker_ui Chrome6/26/2012 Firefox11/14/20171967
html.elements.input.type_time πŸ“‹Chrome6/26/2012 Firefox11/14/20171967

2017/10

API First Browser Date Last Browser Date Days Notes
api.Document.visibilitychange_event πŸ“‹Firefox9/28/2017 Chrome10/17/201719
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.HTMLDataElement πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
api.HTMLDataElement.value πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
api.HTMLMediaElement.captureStream πŸ“‹Firefox8/28/2012 Chrome10/17/20171876
api.HTMLTimeElement πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
api.HTMLTimeElement.dateTime πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
api.MediaSource.clearLiveSeekableRange πŸ“‹Firefox11/15/2016 Chrome10/17/2017336
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.setLiveSeekableRange πŸ“‹Firefox11/15/2016 Chrome10/17/2017336
Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.Performance.timeOrigin πŸ“‹Firefox4/19/2017 Chrome10/17/2017181
css.properties.text-emphasis-position.left Firefox4/26/2016 Chrome10/17/2017539
css.properties.text-emphasis-position.right Firefox4/26/2016 Chrome10/17/2017539
css.types.color.rgb_hexadecimal_notation.alpha_hexadecimal_notation Firefox9/20/2016 Chrome10/17/2017392
html.elements.data πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
html.elements.data.value πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
html.elements.time πŸ“‹Firefox6/25/2013 Chrome10/17/20171575
html.elements.time.datetime Firefox6/25/2013 Chrome10/17/20171575
javascript.grammar.template_literals.template_literal_revision Firefox4/19/2017 Chrome10/17/2017181

2017/9

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.drawImage.SVGImageElement_source_image Chrome6/5/2017 Firefox9/28/2017115
api.HTMLButtonElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.HTMLInputElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.HTMLLinkElement.as πŸ“‹Chrome4/13/2016 Firefox9/28/2017533
api.HTMLMeterElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.HTMLOutputElement.labels πŸ“‹Chrome2/3/2011 Firefox9/28/20172429
api.HTMLProgressElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.HTMLSelectElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.HTMLTextAreaElement.labels πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.MediaDevices.getSupportedConstraints.return_object_property_channelCount πŸ“‹Chrome8/31/2016 Firefox9/28/2017393
api.PerformanceTiming.secureConnectionStart πŸ“‹Chrome9/2/2010 Firefox9/28/20172583
api.RTCStatsReport.type_candidate-pair.bytesReceived πŸ“‹Chrome4/19/2017 Firefox9/28/2017162
api.RTCStatsReport.type_candidate-pair.bytesSent πŸ“‹Chrome4/19/2017 Firefox9/28/2017162
api.RTCStatsReport.type_candidate-pair.nominated πŸ“‹Chrome4/19/2017 Firefox9/28/2017162
api.RTCStatsReport.type_candidate-pair.transportId πŸ“‹Chrome4/19/2017 Firefox9/28/2017162
api.WEBGL_debug_shaders πŸ“‹Chrome12/1/2015 Firefox9/28/2017667
api.WEBGL_debug_shaders.getTranslatedShaderSource πŸ“‹Chrome12/1/2015 Firefox9/28/2017667
html.elements.link.as πŸ“‹Chrome4/13/2016 Firefox9/28/2017533
api.CSS.supports_static.optional_parens Firefox8/8/2017 Chrome9/5/201728
api.DOMMatrix πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.DOMMatrix πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.a πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.b πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.c πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.d πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.e πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.f πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.invertSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m11 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m12 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m13 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m14 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m21 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m22 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m23 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m24 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m31 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m32 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m33 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m34 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m41 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m42 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m43 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.m44 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.multiplySelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.preMultiplySelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.rotateAxisAngleSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.rotateFromVectorSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.rotateSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.scale3dSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
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 Chrome9/5/20171057
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 Chrome9/5/20171057
api.DOMMatrix.skewXSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.skewYSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrix.translateSelf πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.a πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.b πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.c πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.d πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.e πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.f πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.flipX πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.flipY πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.inverse πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.is2D πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m11 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m12 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m13 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m14 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m21 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m22 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m23 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m24 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m31 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m32 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m33 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m34 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m41 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m42 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m43 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.m44 πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.multiply πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.rotate πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.rotateAxisAngle πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.rotateFromVector πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.scale πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
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 Chrome9/5/20171057
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 Chrome9/5/20171057
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 Chrome9/5/20171057
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 Chrome9/5/20171057
api.DOMMatrixReadOnly.toFloat64Array πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.toString Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.transformPoint πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMMatrixReadOnly.translate πŸ“‹Firefox10/14/2014 Chrome9/5/20171057
api.DOMPoint πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPoint.DOMPoint πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPoint.w πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPoint.x πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPoint.y πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPoint.z πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPointReadOnly πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPointReadOnly.w πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPointReadOnly.x πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPointReadOnly.y πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMPointReadOnly.z πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMQuad πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMQuad.DOMQuad πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMQuad.p1 πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
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 Chrome9/5/20171141
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 Chrome9/5/20171141
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 Chrome9/5/20171141
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.DOMRect πŸ“‹Firefox2/4/2014 Chrome9/5/20171309
api.DOMRect.DOMRect πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMRect.x πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMRect.y πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMRectList πŸ“‹Firefox2/4/2014 Chrome9/5/20171309
api.DOMRectReadOnly πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMRectReadOnly.x πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMRectReadOnly.y πŸ“‹Firefox7/22/2014 Chrome9/5/20171141
api.DOMTokenList.replace πŸ“‹Firefox9/20/2016 Chrome9/5/2017350
api.Element.getAttributeNames πŸ“‹Firefox3/8/2016 Chrome9/5/2017546
api.Element.scroll πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
api.Element.scroll.options_behavior_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scroll.options_left_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scroll.options_top_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollBy πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollBy.options_behavior_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollBy.options_left_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollBy.options_top_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollIntoView.options_parameter πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollTo πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollTo.options_behavior_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollTo.options_left_parameter Firefox2/24/2015 Chrome9/5/2017924
api.Element.scrollTo.options_top_parameter Firefox2/24/2015 Chrome9/5/2017924
api.PerformanceResourceTiming.nextHopProtocol πŸ“‹Firefox3/8/2016 Chrome9/5/2017546
api.URLSearchParams.URLSearchParams.record Firefox6/13/2017 Chrome9/5/201784
api.URLSearchParams.sort πŸ“‹Firefox6/13/2017 Chrome9/5/201784
api.Window.scroll.options_behavior_parameter Firefox2/24/2015 Chrome9/5/2017924
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 Chrome9/5/2017924
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 Chrome9/5/2017924
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.scroll-behavior πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
css.properties.scroll-behavior.auto πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
css.properties.scroll-behavior.smooth πŸ“‹Firefox2/24/2015 Chrome9/5/2017924
http.headers.Referrer-Policy.same-origin Firefox3/7/2017 Chrome9/5/2017182
http.headers.Referrer-Policy.strict-origin Firefox3/7/2017 Chrome9/5/2017182
http.headers.Referrer-Policy.strict-origin-when-cross-origin Firefox3/7/2017 Chrome9/5/2017182

2017/8

API First Browser Date Last Browser Date Days Notes
api.CSSStyleSheet.insertRule.index_parameter_optional Chrome12/11/2008 Firefox8/8/20173162
api.DOMTokenList.remove_duplicates Chrome7/25/2017 Firefox8/8/201714
api.Geolocation.secure_context_required Chrome4/13/2016 Firefox8/8/2017482
WebView Android: Secure context is only required for applications targeting Android Nougat (7) and higher. See bug 40465140.
api.GeolocationCoordinates.secure_context_required Chrome12/1/2015 Firefox8/8/2017616
api.GeolocationPosition.secure_context_required Chrome12/1/2015 Firefox8/8/2017616
api.GeolocationPositionError.secure_context_required Chrome12/1/2015 Firefox8/8/2017616
api.IdleDeadline πŸ“‹Chrome12/1/2015 Firefox8/8/2017616
api.IdleDeadline.didTimeout πŸ“‹Chrome12/1/2015 Firefox8/8/2017616
api.IdleDeadline.timeRemaining πŸ“‹Chrome12/1/2015 Firefox8/8/2017616
api.IntersectionObserver πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserver.IntersectionObserver πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
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“‹Chrome5/25/2016 Firefox8/8/2017440
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserver.observe πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserver.root πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserver.rootMargin πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
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“‹Chrome5/25/2016 Firefox8/8/2017440
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserver.thresholds πŸ“‹Chrome7/20/2016 Firefox8/8/2017384
api.IntersectionObserver.unobserve πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
Edge: Available since Windows Insider Preview Build 14986.
api.IntersectionObserverEntry πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.boundingClientRect πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.intersectionRatio πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.intersectionRect πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.isIntersecting πŸ“‹Chrome4/19/2017 Firefox8/8/2017111
api.IntersectionObserverEntry.rootBounds πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.target πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.IntersectionObserverEntry.time πŸ“‹Chrome5/25/2016 Firefox8/8/2017440
api.MediaQueryList.EventTarget_inheritance Chrome11/18/2014 Firefox8/8/2017994
api.MediaQueryList.change_event πŸ“‹Chrome11/18/2014 Firefox8/8/2017994
api.MediaQueryListEvent πŸ“‹Chrome11/18/2014 Firefox8/8/2017994
api.MediaQueryListEvent.MediaQueryListEvent πŸ“‹Chrome11/18/2014 Firefox8/8/2017994
api.MediaQueryListEvent.matches πŸ“‹Chrome11/18/2014 Firefox8/8/2017994
api.MediaQueryListEvent.media πŸ“‹Chrome11/18/2014 Firefox8/8/2017994
api.Navigator.geolocation.secure_context_required Chrome12/1/2015 Firefox8/8/2017616
api.PaymentRequest πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.PaymentRequest πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.abort πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.canMakePayment πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.id πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.shippingAddress Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.shippingOption Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.shippingType Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.shippingaddresschange_event Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.shippingoptionchange_event Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequest.show πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequestUpdateEvent πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequestUpdateEvent.PaymentRequestUpdateEvent πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentRequestUpdateEvent.updateWith πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.complete πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.details πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.methodName πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.payerEmail πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.payerName πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.payerPhone πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.requestId πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.shippingAddress πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.shippingOption πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.PaymentResponse.toJSON Chrome7/25/2017 Firefox8/8/201714
api.SVGRadialGradientElement.fr πŸ“‹Chrome1/10/2013 Firefox8/8/20171671
api.Selection.collapse.node_parameter_nullable Chrome11/18/2014 Firefox8/8/2017994
api.Selection.collapse.offset_parameter_optional Chrome12/11/2008 Firefox8/8/20173162
api.Selection.containsNode.partialContainment_parameter_optional Chrome12/11/2008 Firefox8/8/20173162
api.Selection.empty πŸ“‹Chrome12/11/2008 Firefox8/8/20173162
api.Selection.extend.offset_parameter_optional Chrome12/11/2008 Firefox8/8/20173162
api.Selection.setPosition πŸ“‹Chrome12/11/2008 Firefox8/8/20173162
api.WEBGL_compressed_texture_s3tc_srgb πŸ“‹Chrome7/25/2017 Firefox8/8/201714
api.WheelEvent.pinch_to_zoom_support Chrome11/12/2013 Firefox8/8/20171365
api.Window.cancelIdleCallback πŸ“‹Chrome12/1/2015 Firefox8/8/2017616
api.Window.requestIdleCallback πŸ“‹Chrome12/1/2015 Firefox8/8/2017616
api.Window.scrollX.subpixel_precision Chrome1/21/2015 Firefox8/8/2017930
api.Window.scrollY.subpixel_precision Chrome1/21/2015 Firefox8/8/2017930
css.selectors.cue πŸ“‹Chrome3/26/2013 Firefox8/8/20171596
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 Chrome3/26/2013 Firefox8/8/20171596
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 Chrome3/26/2013 Firefox8/8/20171596
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“‹Chrome3/28/2012 Firefox8/8/20171959
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 Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Float64Array.Float64Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Int16Array.Int16Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Int32Array.Int32Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Int8Array.Int8Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Intl.Collator.Collator.options_caseFirst_parameter Chrome1/10/2013 Firefox8/8/20171671
javascript.builtins.String.toLocaleLowerCase.locales_parameter Chrome4/19/2017 Firefox8/8/2017111
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 Chrome4/19/2017 Firefox8/8/2017111
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 Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Uint16Array.Uint16Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Uint32Array.Uint32Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Uint8Array.Uint8Array.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.constructor_without_parameters Chrome10/19/2010 Firefox8/8/20172485
javascript.operators.destructuring.rest_in_objects Chrome7/25/2017 Firefox8/8/201714
javascript.operators.object_initializer.spread_properties Chrome7/25/2017 Firefox8/8/201714
javascript.operators.spread.spread_in_object_literals πŸ“‹Chrome7/25/2017 Firefox8/8/201714

2017/7

API First Browser Date Last Browser Date Days Notes
api.BeforeUnloadEvent.user_interaction Firefox1/26/2016 Chrome7/25/2017546
api.Client.type πŸ“‹Firefox6/13/2017 Chrome7/25/201742
api.Document.Document πŸ“‹Firefox4/2/2013 Chrome7/25/20171575
api.ExtendableEvent.waitUntil.async_waitUntil Firefox4/19/2017 Chrome7/25/201797
api.ImageCapture.takePhoto πŸ“‹Firefox1/13/2015 Chrome7/25/2017924
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.InputEvent πŸ“‹Firefox7/22/2014 Chrome7/25/20171099
api.InputEvent.InputEvent πŸ“‹Firefox7/22/2014 Chrome7/25/20171099
api.InputEvent.isComposing πŸ“‹Firefox7/22/2014 Chrome7/25/20171099
api.Request.formData πŸ“‹Firefox7/2/2015 Chrome7/25/2017754
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 Chrome7/25/2017754
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.Window.message_event πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.align-content.flex_context.space-evenly Firefox3/7/2017 Chrome7/25/2017140
css.properties.font.font-width_keyword_values Firefox12/15/2015 Chrome7/25/2017588
css.properties.font-stretch πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
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 Chrome7/25/20172044
css.properties.font-stretch.expanded πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.extra-condensed πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.extra-expanded πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.normal πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.semi-condensed πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.semi-expanded πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.ultra-condensed πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.font-stretch.ultra-expanded πŸ“‹Firefox12/20/2011 Chrome7/25/20172044
css.properties.justify-content.flex_context.space-evenly Firefox3/7/2017 Chrome7/25/2017140
css.selectors.focus-within πŸ“‹Firefox3/7/2017 Chrome7/25/2017140

2017/6

API First Browser Date Last Browser Date Days Notes
api.Clients.matchAll πŸ“‹Chrome4/14/2015 Firefox6/13/2017791
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.ProgressEvent.worker_support Chrome12/1/2015 Firefox6/13/2017560
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.URL.toString πŸ“‹Chrome5/15/2012 Firefox6/13/20171855
api.origin πŸ“‹Chrome6/5/2017 Firefox6/13/20178
css.properties.appearance.none πŸ“‹Chrome12/11/2008 Firefox6/13/20173106
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“‹Chrome11/6/2012 Firefox6/13/20171680
css.types.basic-shape πŸ“‹Chrome8/26/2014 Firefox6/13/20171022
css.types.basic-shape.animation Chrome8/26/2014 Firefox6/13/20171022
css.types.basic-shape.circle πŸ“‹Chrome8/26/2014 Firefox6/13/20171022
css.types.basic-shape.ellipse πŸ“‹Chrome8/26/2014 Firefox6/13/20171022
css.types.basic-shape.inset πŸ“‹Chrome8/26/2014 Firefox6/13/20171022
css.types.basic-shape.polygon πŸ“‹Chrome8/26/2014 Firefox6/13/20171022
api.DeviceMotionEvent.DeviceMotionEvent πŸ“‹Firefox4/29/2014 Chrome6/5/20171133
api.DeviceOrientationEvent.DeviceOrientationEvent πŸ“‹Firefox11/20/2012 Chrome6/5/20171658
api.ImageCapture πŸ“‹Firefox1/13/2015 Chrome6/5/2017874
api.ImageCapture.ImageCapture πŸ“‹Firefox1/13/2015 Chrome6/5/2017874
api.ImageCapture.track πŸ“‹Firefox1/13/2015 Chrome6/5/2017874
api.MediaError.message πŸ“‹Firefox3/7/2017 Chrome6/5/201790
api.MediaStreamTrack.applyConstraints πŸ“‹Firefox12/15/2015 Chrome6/5/2017538
api.MediaStreamTrack.applyConstraints.deviceId_constraint πŸ“‹Firefox12/15/2015 Chrome6/5/2017538
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 Chrome6/5/2017202
api.MediaStreamTrack.applyConstraints.facingMode_constraint πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.MediaStreamTrack.applyConstraints.frameRate_constraint πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.MediaStreamTrack.applyConstraints.height_constraint πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.MediaStreamTrack.applyConstraints.latency_constraint πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.MediaStreamTrack.applyConstraints.width_constraint πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.MediaStreamTrack.getSettings πŸ“‹Firefox11/15/2016 Chrome6/5/2017202
api.RTCPeerConnection.getReceivers πŸ“‹Firefox12/1/2014 Chrome6/5/2017917
api.RTCPeerConnection.icegatheringstatechange_event πŸ“‹Firefox6/25/2013 Chrome6/5/20171441
api.RTCRtpReceiver πŸ“‹Firefox12/1/2014 Chrome6/5/2017917
api.RTCRtpReceiver.track πŸ“‹Firefox12/1/2014 Chrome6/5/2017917
api.RTCStatsReport.size πŸ“‹Firefox8/2/2016 Chrome6/5/2017307
api.XMLHttpRequest.send.body_URLSearchParams_type Firefox1/26/2016 Chrome6/5/2017496
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.
css.properties.align-content.flex_context.first_baseline Firefox3/7/2017 Chrome6/5/201790
css.properties.align-items.flex_context.first_baseline Firefox3/7/2017 Chrome6/5/201790
css.properties.align-self.flex_context.first_baseline Firefox3/7/2017 Chrome6/5/201790
css.properties.place-content πŸ“‹Firefox3/8/2016 Chrome6/5/2017454
css.properties.place-content.flex_context Firefox3/8/2016 Chrome6/5/2017454
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-content.grid_context Firefox4/19/2017 Chrome6/5/201747
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 Chrome6/5/2017454
css.properties.place-items.flex_context Firefox3/8/2016 Chrome6/5/2017454
css.properties.place-items.grid_context Firefox3/8/2016 Chrome6/5/2017454
css.properties.place-self πŸ“‹Firefox3/8/2016 Chrome6/5/2017454
css.properties.place-self.flex_context Firefox3/8/2016 Chrome6/5/2017454
css.properties.place-self.grid_context Firefox3/8/2016 Chrome6/5/2017454
html.elements.meta.http-equiv.content-language πŸ“‹Firefox11/9/2004 Chrome6/5/20174591
html.elements.meta.http-equiv.content-security-policy πŸ“‹Firefox11/9/2004 Chrome6/5/20174591
html.elements.meta.http-equiv.content-type πŸ“‹Firefox11/9/2004 Chrome6/5/20174591

2017/4

API First Browser Date Last Browser Date Days Notes
api.AnalyserNode.AnalyserNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.AudioBuffer.AudioBuffer πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
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.AudioBufferSourceNode.AudioBufferSourceNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.AudioParam.maxValue πŸ“‹Chrome7/20/2016 Firefox4/19/2017273
api.AudioParam.minValue πŸ“‹Chrome7/20/2016 Firefox4/19/2017273
api.AudioScheduledSourceNode πŸ“‹Chrome3/9/2017 Firefox4/19/201741
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.BaseAudioContext πŸ“‹Chrome1/25/2017 Firefox4/19/201784
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.BiquadFilterNode.BiquadFilterNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.CSSNamespaceRule πŸ“‹Chrome12/1/2015 Firefox4/19/2017505
api.ChannelMergerNode.ChannelMergerNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.ChannelSplitterNode.ChannelSplitterNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.ClipboardEvent.ClipboardEvent πŸ“‹Firefox6/25/2013 Chrome4/19/20171394
api.CompositionEvent.CompositionEvent πŸ“‹Chrome3/26/2013 Firefox4/19/20171485
api.ConvolverNode.ConvolverNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.DelayNode.DelayNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.DynamicsCompressorNode.DynamicsCompressorNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.Element.auxclick_event πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
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.Event.cancelBubble πŸ“‹Chrome12/11/2008 Firefox4/19/20173051
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.GainNode.GainNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.HTMLLinkElement.referrerPolicy πŸ“‹Firefox11/15/2016 Chrome4/19/2017155
api.HTMLMediaElement.play.returns_promise Chrome4/13/2016 Firefox4/19/2017371
api.IDBCursor.continuePrimaryKey πŸ“‹Firefox1/31/2012 Chrome4/19/20171905
api.IDBCursor.key.binary_keys Firefox1/24/2017 Chrome4/19/201785
api.IIRFilterNode.IIRFilterNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.MediaElementAudioSourceNode.MediaElementAudioSourceNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.MediaStreamAudioDestinationNode.MediaStreamAudioDestinationNode πŸ“‹Chrome3/9/2017 Firefox4/19/201741
api.MediaStreamAudioSourceNode.MediaStreamAudioSourceNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.MouseEvent.x πŸ“‹Chrome12/11/2008 Firefox4/19/20173051
api.MouseEvent.y πŸ“‹Chrome12/11/2008 Firefox4/19/20173051
api.Node.getRootNode πŸ“‹Chrome10/12/2016 Firefox4/19/2017189
api.OfflineAudioCompletionEvent.OfflineAudioCompletionEvent πŸ“‹Chrome3/9/2017 Firefox4/19/201741
api.OscillatorNode.OscillatorNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.PannerNode.PannerNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.PeriodicWave.PeriodicWave πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.RTCPeerConnection.getStats.returns_promise Firefox3/31/2015 Chrome4/19/2017750
api.RTCStatsReport πŸ“‹Firefox2/4/2014 Chrome4/19/20171170
api.RTCStatsReport.@@iterator Firefox8/2/2016 Chrome4/19/2017260
api.RTCStatsReport.entries πŸ“‹Firefox8/2/2016 Chrome4/19/2017260
api.RTCStatsReport.forEach πŸ“‹Firefox2/4/2014 Chrome4/19/20171170
api.RTCStatsReport.get πŸ“‹Firefox2/4/2014 Chrome4/19/20171170
api.RTCStatsReport.has πŸ“‹Firefox2/4/2014 Chrome4/19/20171170
api.RTCStatsReport.keys πŸ“‹Firefox8/2/2016 Chrome4/19/2017260
api.RTCStatsReport.type_candidate-pair πŸ“‹Firefox4/29/2014 Chrome4/19/20171086
api.RTCStatsReport.type_candidate-pair.localCandidateId πŸ“‹Firefox4/29/2014 Chrome4/19/20171086
api.RTCStatsReport.type_candidate-pair.priority Firefox11/3/2015 Chrome4/19/2017533
api.RTCStatsReport.type_candidate-pair.remoteCandidateId πŸ“‹Firefox4/29/2014 Chrome4/19/20171086
api.RTCStatsReport.type_candidate-pair.state πŸ“‹Firefox4/29/2014 Chrome4/19/20171086
api.RTCStatsReport.values Firefox8/2/2016 Chrome4/19/2017260
api.SVGGeometryElement πŸ“‹Chrome1/25/2017 Firefox4/19/201784
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.Selection.removeRange πŸ“‹Firefox11/9/2004 Chrome4/19/20174544
api.Selection.setBaseAndExtent πŸ“‹Chrome12/11/2008 Firefox4/19/20173051
api.StereoPannerNode.StereoPannerNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
api.URLSearchParams.URLSearchParams.sequence Chrome4/19/2017 Firefox4/19/2017
api.WEBGL_compressed_texture_astc πŸ“‹Chrome12/1/2015 Firefox4/19/2017505
api.WEBGL_compressed_texture_astc.getSupportedProfiles πŸ“‹Chrome12/1/2015 Firefox4/19/2017505
api.WEBGL_debug_renderer_info πŸ“‹Chrome2/20/2014 Firefox4/19/20171154
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).
api.WaveShaperNode.WaveShaperNode πŸ“‹Chrome12/1/2016 Firefox4/19/2017139
css.properties.caret-color πŸ“‹Chrome3/9/2017 Firefox4/19/201741
css.properties.caret-color.auto πŸ“‹Chrome3/9/2017 Firefox4/19/201741
css.properties.caret-color.currentColor πŸ“‹Chrome3/9/2017 Firefox4/19/201741
css.properties.caret-color.transparent πŸ“‹Chrome3/9/2017 Firefox4/19/201741
css.properties.display.flow-root Chrome4/19/2017 Firefox4/19/2017
css.properties.mask-image.multiple_mask_images Chrome12/11/2008 Firefox4/19/20173051
css.properties.mask-image.svg_masks Chrome12/2/2010 Firefox4/19/20172330
css.properties.tab-size.length πŸ“‹Chrome4/14/2015 Firefox4/19/2017736
html.elements.img.usemap.case_sensitive Firefox1/24/2017 Chrome4/19/201785
javascript.builtins.Function.name.inferred_names Chrome5/25/2016 Firefox4/19/2017329
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 Chrome5/20/2014 Firefox4/19/20171065
javascript.functions.arrow_functions.trailing_comma Firefox3/7/2017 Chrome4/19/201743
javascript.grammar.trailing_commas.trailing_commas_in_functions Firefox3/7/2017 Chrome4/19/201743
javascript.operators.function.trailing_comma Firefox3/7/2017 Chrome4/19/201743
javascript.operators.generator_function.trailing_comma Firefox3/7/2017 Chrome4/19/201743
javascript.statements.for_of.closing_iterators Chrome5/25/2016 Firefox4/19/2017329
javascript.statements.function.trailing_comma_in_parameters Firefox3/7/2017 Chrome4/19/201743
javascript.statements.generator_function.trailing_comma_in_parameters Firefox3/7/2017 Chrome4/19/201743

2017/3

API First Browser Date Last Browser Date Days Notes
api.FontFaceSetLoadEvent.FontFaceSetLoadEvent πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
api.HTMLFieldSetElement.elements.type_HTMLCollection Firefox3/22/2011 Chrome3/9/20172179
api.MediaDevices.devicechange_event πŸ“‹Firefox3/7/2017 Chrome3/9/20172
api.RTCDataChannel.bufferedamountlow_event πŸ“‹Firefox1/26/2016 Chrome3/9/2017408
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.Response.redirected πŸ“‹Firefox9/20/2016 Chrome3/9/2017170
css.properties.align-content.flex_context.baseline Firefox3/8/2016 Chrome3/9/2017366
css.properties.align-content.flex_context.stretch Firefox3/7/2017 Chrome3/9/20172
css.properties.align-content.grid_context πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.align-items.grid_context πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.align-items.grid_context.start_end Firefox3/7/2017 Chrome3/9/20172
css.properties.align-self.flex_context.stretch πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.align-self.grid_context πŸ“‹Firefox3/7/2017 Chrome3/9/20172
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.block-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.display.grid Firefox3/7/2017 Chrome3/9/20172
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 Chrome3/9/20172
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.gap πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.gap.normal πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid πŸ“‹Firefox3/7/2017 Chrome3/9/20172
Samsung Internet: This was added early so is out of sync with the equivalent Chromium version.
css.properties.grid.none πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-area πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-area.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-columns.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-columns.max-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-columns.min-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-flow πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-flow.column πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-flow.dense πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-flow.row πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-rows.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-rows.max-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-auto-rows.min-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column-end πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column-end.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column-start πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-column-start.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row-end πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row-end.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row-start πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-row-start.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template.none πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-areas πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-areas.none πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.fit-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.max-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.min-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.minmax πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-columns.none πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.auto πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.fit-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.max-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.min-content πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.minmax πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.grid-template-rows.none πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.inline-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.justify-content.flex_context.stretch Firefox3/7/2017 Chrome3/9/20172
css.properties.justify-content.grid_context πŸ“‹Firefox3/7/2017 Chrome3/9/20172
css.properties.justify-items.grid_context πŸ“‹Firefox3/8/2016 Chrome3/9/2017366
css.properties.justify-self πŸ“‹Firefox3/8/2016 Chrome3/9/2017366
css.properties.justify-self.auto Firefox3/8/2016 Chrome3/9/2017366
css.properties.justify-self.grid_context πŸ“‹Firefox3/8/2016 Chrome3/9/2017366
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 Chrome3/9/2017366
css.properties.justify-self.normal Firefox3/8/2016 Chrome3/9/2017366
css.properties.justify-self.right Firefox3/8/2016 Chrome3/9/2017366
css.properties.justify-self.stretch Firefox3/8/2016 Chrome3/9/2017366
css.properties.max-block-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.max-block-size.none πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.max-inline-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.max-inline-size.none πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.min-block-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.min-block-size.auto πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.min-inline-size πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.min-inline-size.auto πŸ“‹Firefox9/22/2015 Chrome3/9/2017534
css.properties.text-decoration.currentColor πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.dashed πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.dotted πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.double πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.includes_color-and-style Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration.solid πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.transparent πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration.wavy πŸ“‹Firefox11/15/2016 Chrome3/9/2017114
css.properties.text-decoration-color πŸ“‹Firefox2/24/2015 Chrome3/9/2017744
css.properties.text-decoration-color.currentColor πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-color.transparent πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-line πŸ“‹Firefox2/24/2015 Chrome3/9/2017744
css.properties.text-decoration-line.blink πŸ“‹Firefox12/10/2013 Chrome3/9/20171185
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 Chrome3/9/20172032
css.properties.text-decoration-line.none πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-line.overline πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-line.underline πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-style πŸ“‹Firefox2/24/2015 Chrome3/9/2017744
css.properties.text-decoration-style.dashed πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-style.dotted πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-style.double πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-style.solid πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.properties.text-decoration-style.wavy πŸ“‹Firefox8/16/2011 Chrome3/9/20172032
css.selectors.first-child.no_parent_required Firefox3/7/2017 Chrome3/9/20172
css.selectors.last-child.no_parent_required Firefox3/7/2017 Chrome3/9/20172
css.selectors.nth-child.no_parent_required Firefox3/7/2017 Chrome3/9/20172
css.selectors.nth-last-child.no_parent_required Firefox3/7/2017 Chrome3/9/20172
css.selectors.only-child.no_parent_required Firefox3/7/2017 Chrome3/9/20172
css.selectors.placeholder πŸ“‹Firefox1/24/2017 Chrome3/9/201744
javascript.builtins.Intl.DateTimeFormat.formatToParts πŸ“‹Firefox1/24/2017 Chrome3/9/201744
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.builtins.String.padEnd πŸ“‹Firefox8/2/2016 Chrome3/9/2017219
javascript.builtins.String.padStart πŸ“‹Firefox8/2/2016 Chrome3/9/2017219
webassembly.api πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.CompileError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.CompileError.CompileError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Instance πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Instance.Instance πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Instance.exports πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.LinkError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.LinkError.LinkError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Memory πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Memory.Memory πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Memory.buffer πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Memory.grow πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Module πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Module.Module πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Module.customSections_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Module.exports_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Module.imports_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.RuntimeError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.RuntimeError.RuntimeError πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table.Table πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table.get πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table.grow πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table.length πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.Table.set πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.compile_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.instantiate_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
webassembly.api.validate_static πŸ“‹Firefox3/7/2017 Chrome3/9/20172
api.BaseAudioContext.createConstantSource πŸ“‹Chrome1/25/2017 Firefox3/7/201741
api.ConstantSourceNode πŸ“‹Chrome1/25/2017 Firefox3/7/201741
api.ConstantSourceNode.ConstantSourceNode πŸ“‹Chrome1/25/2017 Firefox3/7/201741
api.ConstantSourceNode.offset πŸ“‹Chrome1/25/2017 Firefox3/7/201741
api.Document.rootElement πŸ“‹Chrome4/8/2014 Firefox3/7/20171064
api.Document.selectionchange_event πŸ“‹Chrome4/27/2011 Firefox3/7/20172141
api.Element.focusin_event πŸ“‹Chrome12/11/2008 Firefox3/7/20173008
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“‹Chrome12/11/2008 Firefox3/7/20173008
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.Element.touchcancel_event πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
api.Element.touchend_event πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
api.Element.touchmove_event πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
api.Element.touchstart_event πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
api.Event.composed πŸ“‹Chrome8/31/2016 Firefox3/7/2017188
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.FileSystemEntry.getParent πŸ“‹Chrome12/2/2010 Firefox3/7/20172287
api.MediaKeySession.keystatuseschange_event πŸ“‹Chrome12/1/2016 Firefox3/7/201796
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.message_event πŸ“‹Chrome12/1/2016 Firefox3/7/201796
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.MediaStream.active πŸ“‹Chrome4/14/2015 Firefox3/7/2017693
api.Node.selectstart_event πŸ“‹Chrome12/11/2008 Firefox3/7/20173008
api.RTCDTMFSender πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFSender.insertDTMF πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFSender.toneBuffer πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFSender.tonechange_event πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFToneChangeEvent πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFToneChangeEvent.RTCDTMFToneChangeEvent πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.RTCDTMFToneChangeEvent.tone πŸ“‹Chrome5/21/2013 Firefox3/7/20171386
api.Touch πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.Touch πŸ“‹Chrome1/20/2016 Firefox3/7/2017412
Firefox: This interface is only exposed if a touch input device is detected.
api.Touch.clientX πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.clientY πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.force πŸ“‹Chrome10/7/2014 Firefox3/7/2017882
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.identifier πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.pageX πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.pageY πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.radiusX πŸ“‹Chrome10/7/2014 Firefox3/7/2017882
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.radiusY πŸ“‹Chrome10/7/2014 Firefox3/7/2017882
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.rotationAngle πŸ“‹Chrome5/19/2015 Firefox3/7/2017658
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.screenX πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.screenY πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.Touch.target πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.altKey πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.changedTouches πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.ctrlKey πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.metaKey πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.shiftKey πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.targetTouches πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchEvent.touches πŸ“‹Chrome9/25/2012 Firefox3/7/20171624
Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchList πŸ“‹Chrome3/28/2012 Firefox3/7/20171805
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchList.item πŸ“‹Chrome3/28/2012 Firefox3/7/20171805
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.TouchList.length πŸ“‹Chrome3/28/2012 Firefox3/7/20171805
Firefox: This interface is only exposed if a touch input device is detected.Firefox: Removed in bug 888304 due to web compatibility issues.
api.fetch.init_referrerPolicy_parameter Chrome7/20/2016 Firefox3/7/2017230
api.isSecureContext.worker_support Chrome12/1/2016 Firefox3/7/201796
css.properties.clip-path.svg_elements Chrome11/6/2012 Firefox3/7/20171582
css.properties.column-count πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
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“‹Chrome4/13/2016 Firefox3/7/2017328
css.properties.column-gap.multicol_context πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
Firefox: Before Firefox 3, the default value for the normal keyword was 0 and not 1em.
css.properties.column-rule πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
Firefox: Before Firefox 3, the default value for the normal keyword was 0 and not 1em.
css.properties.column-rule-color πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
css.properties.column-rule-style πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
css.properties.column-rule-width πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
css.properties.columns πŸ“‹Chrome4/13/2016 Firefox3/7/2017328
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.position.absolutely_positioned_flex_children Chrome7/20/2016 Firefox3/7/2017230
css.properties.row-gap πŸ“‹Chrome12/1/2015 Firefox3/7/2017462
css.properties.row-gap.normal πŸ“‹Chrome12/1/2015 Firefox3/7/2017462
css.properties.touch-action πŸ“‹Chrome7/16/2014 Firefox3/7/2017965
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.manipulation Chrome7/16/2014 Firefox3/7/2017965
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.none Chrome7/16/2014 Firefox3/7/2017965
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.pan-x Chrome7/16/2014 Firefox3/7/2017965
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
css.properties.touch-action.pan-y Chrome7/16/2014 Firefox3/7/2017965
Firefox: Not applicable to Firefox platforms that support neither pointer nor touch events.
html.elements.a.rel.noopener πŸ“‹Chrome3/2/2016 Firefox3/7/2017370
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.rel.noopener πŸ“‹Chrome3/2/2016 Firefox3/7/2017370
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.
http.headers.Content-Security-Policy.strict-dynamic Chrome7/20/2016 Firefox3/7/2017230
javascript.builtins.Array.toLocaleString.locales_parameter Chrome1/10/2013 Firefox3/7/20171517
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 Chrome1/10/2013 Firefox3/7/20171517
javascript.builtins.AsyncFunction πŸ“‹Chrome12/1/2016 Firefox3/7/201796
javascript.builtins.AsyncFunction.AsyncFunction πŸ“‹Chrome12/1/2016 Firefox3/7/201796
javascript.builtins.Date.toLocaleDateString.iana_time_zone_names Chrome1/10/2013 Firefox3/7/20171517
javascript.builtins.Date.toLocaleString.iana_time_zone_names Chrome1/10/2013 Firefox3/7/20171517
javascript.builtins.Date.toLocaleTimeString.iana_time_zone_names Chrome1/10/2013 Firefox3/7/20171517
javascript.builtins.Float32Array.Float32Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Float64Array.Float64Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Int16Array.Int16Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Int32Array.Int32Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Int8Array.Int8Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter.iana_time_zones Chrome1/10/2013 Firefox3/7/20171517
javascript.builtins.TypedArray.iterable_in_constructor Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Uint16Array.Uint16Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Uint32Array.Uint32Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Uint8Array.Uint8Array.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray.iterable_allowed Chrome11/18/2014 Firefox3/7/2017840
javascript.functions.method_definitions.async_methods Chrome12/1/2016 Firefox3/7/201796
javascript.functions.rest_parameters.destructuring Chrome3/2/2016 Firefox3/7/2017370
javascript.operators.async_function πŸ“‹Chrome12/1/2016 Firefox3/7/201796
javascript.operators.await πŸ“‹Chrome12/1/2016 Firefox3/7/201796
javascript.operators.exponentiation πŸ“‹Chrome7/20/2016 Firefox3/7/2017230
javascript.operators.exponentiation_assignment πŸ“‹Chrome7/20/2016 Firefox3/7/2017230
javascript.statements.async_function πŸ“‹Chrome12/1/2016 Firefox3/7/201796

2017/1

API First Browser Date Last Browser Date Days Notes
api.CSSConditionRule πŸ“‹Firefox4/2/2013 Chrome1/25/20171394
api.CSSConditionRule.conditionText πŸ“‹Firefox4/2/2013 Chrome1/25/20171394
api.Document.createElement.options_parameter Firefox11/15/2016 Chrome1/25/201771
Chrome: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Chrome Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Edge: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Firefox: Firefox accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object.Firefox for Android: Firefox for Android accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object.Quest Browser: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Opera: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Opera Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Samsung Internet: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.WebView Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.
api.Document.createElementNS.options_parameter Firefox11/15/2016 Chrome1/25/201771
Chrome: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Chrome Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Edge: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Firefox: Firefox accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object.Firefox for Android: Firefox for Android accepts a string instead of an object here, but only from version 51 onwards. In version 50, options must be an object.Quest Browser: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Opera: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Opera Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.Samsung Internet: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.WebView Android: For backwards compatibility, the options parameter can be an object or a string with the custom element tag name, although the string version is deprecated.
api.EXT_color_buffer_float πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.HTMLCanvasElement.getContext.webgl2_context Firefox1/24/2017 Chrome1/25/20171
api.HTMLCanvasElement.getContext.webgl2_context.options_alpha_parameter πŸ“‹Firefox6/10/2014 Chrome1/25/2017960
api.HTMLCanvasElement.getContext.webgl2_context.options_failIfMajorPerformanceCaveat_parameter πŸ“‹Firefox9/22/2015 Chrome1/25/2017491
api.KeyboardEvent.isComposing πŸ“‹Firefox7/22/2014 Chrome1/25/2017918
api.Performance.toJSON πŸ“‹Firefox10/29/2013 Chrome1/25/20171184
api.PerformanceNavigation.toJSON πŸ“‹Firefox10/29/2013 Chrome1/25/20171184
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.RTCDataChannelEvent.RTCDataChannelEvent πŸ“‹Firefox6/25/2013 Chrome1/25/20171310
api.RTCPeerConnection πŸ“‹Firefox1/26/2016 Chrome1/25/2017365
api.RTCPeerConnection.RTCPeerConnection πŸ“‹Firefox1/26/2016 Chrome1/25/2017365
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_iceTransportPolicy_parameter πŸ“‹Firefox11/3/2015 Chrome1/25/2017449
api.RTCPeerConnectionIceEvent πŸ“‹Firefox9/17/2013 Chrome1/25/20171226
api.RTCPeerConnectionIceEvent.RTCPeerConnectionIceEvent πŸ“‹Firefox9/17/2013 Chrome1/25/20171226
api.RTCTrackEvent πŸ“‹Firefox6/25/2013 Chrome1/25/20171310
api.RTCTrackEvent.receiver πŸ“‹Firefox12/1/2014 Chrome1/25/2017786
api.RTCTrackEvent.streams πŸ“‹Firefox6/25/2013 Chrome1/25/20171310
api.RTCTrackEvent.track πŸ“‹Firefox6/25/2013 Chrome1/25/20171310
api.WebGL2RenderingContext πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.activeTexture πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.attachShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.beginQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.beginTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindAttribLocation πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindBuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindBufferBase πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindBufferRange πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindRenderbuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindSampler πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindTexture πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bindVertexArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blendColor πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blendEquation πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blendEquationSeparate πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blendFunc πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blendFuncSeparate πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.blitFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bufferData πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.bufferSubData πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.canvas πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.checkFramebufferStatus πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clear πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearBufferfi πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearBufferfv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearBufferiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearBufferuiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearColor πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearDepth πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clearStencil πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.clientWaitSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.colorMask πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.compileShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.compressedTexImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.compressedTexImage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.compressedTexSubImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.compressedTexSubImage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.copyBufferSubData πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.copyTexImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.copyTexSubImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.copyTexSubImage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createBuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createRenderbuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createSampler πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createTexture πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.createVertexArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.cullFace πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteBuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteRenderbuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteSampler πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteTexture πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.deleteVertexArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.depthFunc πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.depthMask πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.depthRange πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.detachShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.disable πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.disableVertexAttribArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawArrays πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawArraysInstanced πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawBuffers πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawElements πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawElementsInstanced πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawRangeElements πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawingBufferHeight πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.drawingBufferWidth πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.enable πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.enableVertexAttribArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.endQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.endTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.fenceSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.finish πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.flush πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.framebufferRenderbuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.framebufferTexture2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.framebufferTextureLayer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.frontFace πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.generateMipmap πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getActiveAttrib πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getActiveUniform πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getActiveUniformBlockName πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getActiveUniformBlockParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getActiveUniforms πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getAttachedShaders πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getAttribLocation πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getBufferParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getBufferSubData πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getContextAttributes πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getError πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getExtension πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getFragDataLocation πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getFramebufferAttachmentParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getIndexedParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getInternalformatParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getProgramInfoLog πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getProgramParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getQueryParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getRenderbufferParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getSamplerParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getShaderInfoLog πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getShaderParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getShaderPrecisionFormat πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getShaderSource πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getSupportedExtensions πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getSyncParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getTexParameter πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getTransformFeedbackVarying πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getUniform πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getUniformBlockIndex πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getUniformIndices πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getUniformLocation πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getVertexAttrib πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.getVertexAttribOffset πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.hint πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.invalidateFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.invalidateSubFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isBuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isContextLost πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isEnabled πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isFramebuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isRenderbuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isSampler πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isShader πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isTexture πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.isVertexArray πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.lineWidth πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.linkProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.pauseTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.pixelStorei πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.polygonOffset πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.readBuffer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.readPixels πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.renderbufferStorage πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.renderbufferStorageMultisample πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.resumeTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.sampleCoverage πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.samplerParameterf πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.samplerParameteri πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.scissor πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.shaderSource πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilFunc πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilFuncSeparate πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilMask πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilMaskSeparate πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilOp πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.stencilOpSeparate πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGL2RenderingContext.texImage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texParameterf πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texParameteri πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texStorage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texStorage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.texSubImage2D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGL2RenderingContext.texSubImage3D πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.transformFeedbackVaryings πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1i πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1iv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1ui πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform1uiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2i πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2iv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2ui πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform2uiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3i πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3iv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3ui πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform3uiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4i πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4iv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4ui πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniform4uiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformBlockBinding πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix2fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix2x3fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix2x4fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix3fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix3x2fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix3x4fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix4fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix4x2fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.uniformMatrix4x3fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.useProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.validateProgram πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib1f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib1fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib2f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib2fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib3f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib3fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib4f πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttrib4fv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribDivisor πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribI4i πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribI4iv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribI4ui πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribI4uiv πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribIPointer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.vertexAttribPointer πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.viewport πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGL2RenderingContext.waitSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGLQuery πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGLSampler πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGLSync πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGLTransformFeedback πŸ“‹Firefox1/24/2017 Chrome1/25/20171
api.WebGLVertexArrayObject πŸ“‹Firefox1/24/2017 Chrome1/25/20171
css.properties.border-image-repeat.space πŸ“‹Firefox11/15/2016 Chrome1/25/201771
css.properties.position.sticky πŸ“‹Firefox9/2/2014 Chrome1/25/2017876
http.headers.Content-Security-Policy.worker_support Firefox11/15/2016 Chrome1/25/201771
http.headers.Referrer-Policy πŸ“‹Firefox11/15/2016 Chrome1/25/201771
api.CanvasRenderingContext2D.imageSmoothingEnabled πŸ“‹Chrome10/1/2013 Firefox1/24/20171211
api.DOMTokenList.trim_whitespace Chrome1/20/2016 Firefox1/24/2017370
api.Element.transitionend_event πŸ“‹Chrome3/26/2013 Firefox1/24/20171400
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.HTMLInputElement.minLength πŸ“‹Chrome1/21/2015 Firefox1/24/2017734
api.HTMLTextAreaElement.minLength πŸ“‹Chrome1/21/2015 Firefox1/24/2017734
api.IDBObjectStore.getKey πŸ“‹Chrome1/20/2016 Firefox1/24/2017370
api.Permissions.revoke πŸ“‹Chrome10/13/2015 Firefox1/24/2017469
api.Request.integrity πŸ“‹Chrome10/13/2015 Firefox1/24/2017469
api.SVGElement.blur πŸ“‹Chrome12/11/2008 Firefox1/24/20172966
api.SVGElement.dataset πŸ“‹Chrome12/1/2016 Firefox1/24/201754
api.SVGElement.focus πŸ“‹Chrome12/11/2008 Firefox1/24/20172966
api.SVGElement.tabIndex πŸ“‹Chrome7/16/2014 Firefox1/24/2017923
api.ValidityState.tooShort πŸ“‹Chrome1/21/2015 Firefox1/24/2017734
css.selectors.indeterminate.radio Chrome11/18/2014 Firefox1/24/2017798
css.selectors.placeholder-shown πŸ“‹Chrome12/1/2015 Firefox1/24/2017420
html.elements.input.minlength πŸ“‹Chrome1/21/2015 Firefox1/24/2017734
html.elements.textarea.minlength πŸ“‹Chrome1/21/2015 Firefox1/24/2017734
javascript.builtins.Symbol.toStringTag πŸ“‹Chrome3/2/2016 Firefox1/24/2017328
javascript.builtins.TypedArray.toLocaleString πŸ“‹Chrome10/19/2010 Firefox1/24/20172289
javascript.builtins.TypedArray.toString πŸ“‹Chrome10/19/2010 Firefox1/24/20172289

2016/12

API First Browser Date Last Browser Date Days Notes
api.EventTarget.addEventListener.options_parameter.options_once_parameter πŸ“‹Firefox11/15/2016 Chrome12/1/201616
api.IDBIndex.name.renaming_through_name_setter Firefox9/20/2016 Chrome12/1/201672
api.IDBObjectStore.name.renaming_through_name_setter Firefox9/20/2016 Chrome12/1/201672
api.MediaStream πŸ“‹Firefox8/28/2012 Chrome12/1/20161556
api.MediaStream.MediaStream πŸ“‹Firefox1/26/2016 Chrome12/1/2016310
api.MediaStreamTrackEvent.MediaStreamTrackEvent πŸ“‹Firefox11/15/2016 Chrome12/1/201616
css.properties.clip-path πŸ“‹Firefox6/30/2009 Chrome12/1/20162711
Edge: Only supports clip paths defined by url().Internet Explorer: Only supports clip paths defined by url().
css.properties.clip-path.is_animatable Firefox9/20/2016 Chrome12/1/201672
css.properties.hyphens πŸ“‹Firefox12/15/2015 Chrome12/1/2016352
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.hyphens.language_english Firefox8/16/2011 Chrome12/1/20161934
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.

2016/11

API First Browser Date Last Browser Date Days Notes
api.BaseAudioContext.createIIRFilter πŸ“‹Chrome3/2/2016 Firefox11/15/2016258
api.DOMTokenList.entries Chrome4/14/2015 Firefox11/15/2016581
api.DOMTokenList.forEach Chrome4/14/2015 Firefox11/15/2016581
api.DOMTokenList.keys Chrome4/14/2015 Firefox11/15/2016581
api.DOMTokenList.values Chrome4/14/2015 Firefox11/15/2016581
api.DataTransfer.items πŸ“‹Chrome9/15/2009 Firefox11/15/20162618
api.DataTransferItem πŸ“‹Chrome4/27/2011 Firefox11/15/20162029
api.DataTransferItem.getAsFile πŸ“‹Chrome4/27/2011 Firefox11/15/20162029
api.DataTransferItem.getAsString πŸ“‹Chrome4/27/2011 Firefox11/15/20162029
api.DataTransferItem.kind πŸ“‹Chrome4/27/2011 Firefox11/15/20162029
api.DataTransferItem.type πŸ“‹Chrome4/27/2011 Firefox11/15/20162029
api.DataTransferItem.webkitGetAsEntry πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.DataTransferItemList πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.DataTransferItemList.add πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.DataTransferItemList.clear πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.DataTransferItemList.length πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.DataTransferItemList.remove πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
api.Document.exitPointerLock πŸ“‹Chrome8/26/2014 Firefox11/15/2016812
api.Document.pointerLockElement πŸ“‹Chrome8/26/2014 Firefox11/15/2016812
api.Document.pointerlockchange_event πŸ“‹Chrome7/16/2014 Firefox11/15/2016853
api.Document.pointerlockerror_event πŸ“‹Chrome7/16/2014 Firefox11/15/2016853
api.Element.requestPointerLock πŸ“‹Chrome8/26/2014 Firefox11/15/2016812
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.File.webkitRelativePath πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
Firefox for Android: Always an empty string (bug 1973726).
api.FileSystem πŸ“‹Chrome10/19/2010 Firefox11/15/20162219
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“‹Chrome10/19/2010 Firefox11/15/20162219
api.FileSystem.root πŸ“‹Chrome10/19/2010 Firefox11/15/20162219
api.FileSystemDirectoryEntry πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemDirectoryEntry.createReader πŸ“‹Chrome8/2/2011 Firefox11/15/20161932
api.FileSystemDirectoryEntry.getDirectory πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
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“‹Chrome12/2/2010 Firefox11/15/20162175
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“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemDirectoryReader.readEntries πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry.filesystem πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry.fullPath πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry.isDirectory πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry.isFile πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemEntry.name πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemFileEntry πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.FileSystemFileEntry.file πŸ“‹Chrome12/2/2010 Firefox11/15/20162175
api.HTMLAnchorElement.referrerPolicy πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.HTMLAreaElement.referrerPolicy πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.HTMLIFrameElement.referrerPolicy πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.HTMLImageElement.referrerPolicy πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.HTMLInputElement.webkitEntries πŸ“‹Chrome9/25/2012 Firefox11/15/20161512
api.HTMLInputElement.webkitdirectory πŸ“‹Chrome10/19/2010 Firefox11/15/20162219
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.IDBDatabase.close_event πŸ“‹Chrome10/1/2013 Firefox11/15/20161141
api.IIRFilterNode πŸ“‹Chrome3/2/2016 Firefox11/15/2016258
api.IIRFilterNode.getFrequencyResponse πŸ“‹Chrome3/2/2016 Firefox11/15/2016258
api.MediaStream.addtrack_event πŸ“‹Chrome3/26/2013 Firefox11/15/20161330
api.MediaStreamTrack.ended_event πŸ“‹Chrome3/26/2013 Firefox11/15/20161330
api.MediaStreamTrack.getConstraints πŸ“‹Chrome8/31/2016 Firefox11/15/201676
api.MediaStreamTrack.readyState πŸ“‹Chrome3/26/2013 Firefox11/15/20161330
api.MediaStreamTrackEvent πŸ“‹Chrome3/26/2013 Firefox11/15/20161330
api.MediaStreamTrackEvent.track πŸ“‹Chrome3/26/2013 Firefox11/15/20161330
api.NodeList.entries Chrome5/25/2016 Firefox11/15/2016174
api.NodeList.forEach πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
api.NodeList.keys Chrome5/25/2016 Firefox11/15/2016174
api.NodeList.values Chrome5/25/2016 Firefox11/15/2016174
api.PannerNode.orientationX πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.PannerNode.orientationY πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.PannerNode.orientationZ πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.PannerNode.positionX πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.PannerNode.positionY πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.PannerNode.positionZ πŸ“‹Chrome7/20/2016 Firefox11/15/2016118
api.WindowClient.navigate πŸ“‹Chrome3/2/2016 Firefox11/15/2016258
Safari: This method exists, but always throws NotSupportedError.Safari on iOS: This method exists, but always throws NotSupportedError.
css.properties.background.border-box πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.bottom πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.center πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.content-box πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.fixed πŸ“‹Chrome10/25/2011 Firefox11/15/20161848
css.properties.background.left πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.padding-box πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.right πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background.top πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.background-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-bottom.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-bottom-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-left.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-left-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-right.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-right-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-top.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.border-top-color.currentColor πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.column-width πŸ“‹Chrome4/13/2016 Firefox11/15/2016216
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“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.pointer-events.visiblePainted πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.pointer-events.visibleStroke πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.shape-rendering.crispEdges πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.shape-rendering.geometricPrecision πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.shape-rendering.optimizeSpeed πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.text-rendering.optimizeLegibility πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.text-rendering.optimizeSpeed πŸ“‹Chrome11/12/2013 Firefox11/15/20161099
css.properties.unicode-bidi.isolate πŸ“‹Chrome1/20/2016 Firefox11/15/2016300
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“‹Chrome1/20/2016 Firefox11/15/2016300
css.properties.unicode-bidi.plaintext πŸ“‹Chrome1/20/2016 Firefox11/15/2016300
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.
html.elements.a.referrerpolicy πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
html.elements.area.referrerpolicy πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
html.elements.iframe.referrerpolicy πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
html.elements.iframe.sandbox.allow-presentation πŸ“‹Chrome8/31/2016 Firefox11/15/201676
html.elements.img.referrerpolicy πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
html.elements.input.webkitdirectory Chrome10/19/2010 Firefox11/15/20162219
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.referrerpolicy πŸ“‹Chrome5/25/2016 Firefox11/15/2016174
html.elements.track.src πŸ“‹Chrome11/6/2012 Firefox11/15/20161470
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“‹Chrome2/21/2013 Firefox11/15/20161363
Firefox: Before Firefox 50, ping attributes of <a> elements weren't covered by connect-src.
http.headers.Content-Security-Policy.sandbox πŸ“‹Chrome2/21/2013 Firefox11/15/20161363
http.headers.Set-Cookie.host_secure_prefixes Chrome3/2/2016 Firefox11/15/2016258
javascript.builtins.Function.@@hasInstance πŸ“‹Chrome4/13/2016 Firefox11/15/2016216
javascript.builtins.Object.getOwnPropertyDescriptors πŸ“‹Chrome10/12/2016 Firefox11/15/201634
javascript.builtins.Symbol.hasInstance πŸ“‹Chrome4/13/2016 Firefox11/15/2016216

2016/10

API First Browser Date Last Browser Date Days Notes
api.BroadcastChannel πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
Node.js: Available as a part of the worker_threads module.
api.BroadcastChannel.BroadcastChannel πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
api.BroadcastChannel.close πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
api.BroadcastChannel.message_event πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
api.BroadcastChannel.name πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
api.BroadcastChannel.postMessage πŸ“‹Firefox5/12/2015 Chrome10/12/2016519
api.CacheStorage.match πŸ“‹Firefox9/22/2015 Chrome10/12/2016386
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.CharacterData.after πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.CharacterData.before πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.CharacterData.replaceWith πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Document.append πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Document.prepend πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.DocumentFragment.append πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.DocumentFragment.prepend πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.DocumentType.after πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.DocumentType.before πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.DocumentType.replaceWith πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Element.after πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Element.append πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Element.before πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Element.prepend πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.Element.replaceWith πŸ“‹Firefox9/20/2016 Chrome10/12/201622
api.HTMLAreaElement.download πŸ“‹Firefox4/2/2013 Chrome10/12/20161289
api.HTMLAreaElement.rel πŸ“‹Firefox6/10/2014 Chrome10/12/2016855
api.PerformanceResourceTiming.decodedBodySize πŸ“‹Firefox3/8/2016 Chrome10/12/2016218
api.PerformanceResourceTiming.encodedBodySize πŸ“‹Firefox3/8/2016 Chrome10/12/2016218
api.PerformanceResourceTiming.transferSize πŸ“‹Firefox3/8/2016 Chrome10/12/2016218
api.PushSubscription.options πŸ“‹Firefox1/26/2016 Chrome10/12/2016260
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 Chrome10/12/2016260
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 Chrome10/12/2016260
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.
html.elements.area.download πŸ“‹Firefox4/2/2013 Chrome10/12/20161289
http.headers.Timing-Allow-Origin πŸ“‹Firefox3/8/2016 Chrome10/12/2016218
javascript.builtins.Intl.getCanonicalLocales πŸ“‹Firefox8/2/2016 Chrome10/12/201671
javascript.builtins.Object.entries πŸ“‹Firefox6/7/2016 Chrome10/12/2016127
javascript.builtins.Object.values πŸ“‹Firefox6/7/2016 Chrome10/12/2016127

2016/9

API First Browser Date Last Browser Date Days Notes
api.BaseAudioContext.createPeriodicWave.constraints_disableNormalization_parameter Chrome10/13/2015 Firefox9/20/2016343
api.CanvasRenderingContext2D.filter πŸ“‹Chrome7/20/2016 Firefox9/20/201662
api.DOMTokenList.supports πŸ“‹Chrome3/2/2016 Firefox9/20/2016202
api.EventTarget.addEventListener.options_parameter Chrome3/2/2016 Firefox9/20/2016202
api.EventTarget.addEventListener.options_parameter.options_capture_parameter πŸ“‹Chrome3/2/2016 Firefox9/20/2016202
api.EventTarget.addEventListener.options_parameter.options_passive_parameter πŸ“‹Chrome5/25/2016 Firefox9/20/2016118
api.EventTarget.removeEventListener.options_parameter Chrome3/2/2016 Firefox9/20/2016202
api.HTMLButtonElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLCanvasElement.webglcontextcreationerror_event πŸ“‹Chrome2/3/2011 Firefox9/20/20162056
api.HTMLDetailsElement πŸ“‹Chrome3/8/2011 Firefox9/20/20162023
api.HTMLDetailsElement.open πŸ“‹Chrome3/8/2011 Firefox9/20/20162023
api.HTMLElement.toggle_event πŸ“‹Chrome7/16/2014 Firefox9/20/2016797
api.HTMLElement.toggle_event.details_elements πŸ“‹Chrome7/16/2014 Firefox9/20/2016797
api.HTMLFieldSetElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLFormElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLInputElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLObjectElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLOutputElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLSelectElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.HTMLTextAreaElement.reportValidity πŸ“‹Chrome1/21/2015 Firefox9/20/2016608
api.MediaStream.getTrackById πŸ“‹Chrome3/26/2013 Firefox9/20/20161274
api.Node.isConnected πŸ“‹Chrome5/25/2016 Firefox9/20/2016118
api.OfflineAudioContext.length πŸ“‹Chrome5/25/2016 Firefox9/20/2016118
api.SpeechSynthesis πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.cancel πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.getVoices πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.pause πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
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“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.pending πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.resume πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.speak πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.speaking πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesis.voiceschanged_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisErrorEvent πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisErrorEvent.error πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisEvent πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisEvent.charIndex πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisEvent.elapsedTime πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisEvent.name πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisEvent.utterance πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.SpeechSynthesisUtterance πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.boundary_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
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“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.error_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.lang πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.mark_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.pause_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.pitch πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.rate πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.resume_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.start_event πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.text πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.voice πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisUtterance.volume πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisVoice πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
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“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisVoice.lang πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisVoice.localService πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisVoice.name πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.SpeechSynthesisVoice.voiceURI πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.WebGLContextEvent πŸ“‹Chrome2/3/2011 Firefox9/20/20162056
api.WebGLContextEvent.WebGLContextEvent πŸ“‹Chrome2/8/2012 Firefox9/20/20161686
api.WebGLContextEvent.statusMessage πŸ“‹Chrome2/3/2011 Firefox9/20/20162056
api.Window.speechSynthesis πŸ“‹Chrome2/20/2014 Firefox9/20/2016943
api.isSecureContext πŸ“‹Chrome12/1/2015 Firefox9/20/2016294
css.at-rules.media.-webkit-transform-3d πŸ“‹Chrome5/21/2009 Firefox9/20/20162679
css.properties.-webkit-mask-position-x Chrome12/11/2008 Firefox9/20/20162840
css.properties.-webkit-mask-position-y Chrome12/11/2008 Firefox9/20/20162840
css.properties.-webkit-text-fill-color πŸ“‹Chrome12/11/2008 Firefox9/20/20162840
css.properties.-webkit-text-stroke πŸ“‹Chrome1/25/2010 Firefox9/20/20162430
css.properties.-webkit-text-stroke-color πŸ“‹Chrome12/11/2008 Firefox9/20/20162840
css.properties.-webkit-text-stroke-width πŸ“‹Chrome12/11/2008 Firefox9/20/20162840
css.properties.background-position-x πŸ“‹Chrome12/11/2008 Firefox9/20/20162840
css.properties.background-position-y πŸ“‹Chrome12/11/2008 Firefox9/20/20162840
css.properties.background-repeat.round πŸ“‹Chrome10/1/2013 Firefox9/20/20161085
css.properties.background-repeat.space πŸ“‹Chrome10/1/2013 Firefox9/20/20161085
css.properties.box-align Chrome12/11/2008 Firefox9/20/20162840
css.properties.box-direction Chrome12/11/2008 Firefox9/20/20162840
css.properties.box-flex Chrome12/11/2008 Firefox9/20/20162840
css.properties.box-ordinal-group Chrome12/11/2008 Firefox9/20/20162840
css.properties.box-orient Chrome12/11/2008 Firefox9/20/20162840
css.properties.box-pack Chrome12/11/2008 Firefox9/20/20162840
css.properties.overflow-wrap πŸ“‹Chrome11/6/2012 Firefox9/20/20161414
css.properties.text-align-last πŸ“‹Chrome12/1/2015 Firefox9/20/2016294
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.
html.elements.details πŸ“‹Chrome6/7/2011 Firefox9/20/20161932
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 Chrome6/7/2011 Firefox9/20/20161932
html.elements.iframe.sandbox.allow-forms πŸ“‹Chrome5/25/2010 Firefox9/20/20162310
html.elements.iframe.sandbox.allow-modals πŸ“‹Chrome10/13/2015 Firefox9/20/2016343
html.elements.iframe.sandbox.allow-pointer-lock πŸ“‹Chrome11/6/2012 Firefox9/20/20161414
html.elements.iframe.sandbox.allow-popups-to-escape-sandbox πŸ“‹Chrome10/13/2015 Firefox9/20/2016343
html.elements.iframe.sandbox.allow-same-origin πŸ“‹Chrome5/25/2010 Firefox9/20/20162310
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“‹Chrome5/25/2010 Firefox9/20/20162310
html.elements.iframe.sandbox.allow-top-navigation πŸ“‹Chrome9/2/2010 Firefox9/20/20162210
html.elements.summary πŸ“‹Chrome6/7/2011 Firefox9/20/20161932
javascript.builtins.Proxy.handler.getPrototypeOf πŸ“‹Chrome3/2/2016 Firefox9/20/2016202
javascript.builtins.Proxy.handler.setPrototypeOf πŸ“‹Chrome3/2/2016 Firefox9/20/2016202
javascript.builtins.RegExp.@@match πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.RegExp.@@replace πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.RegExp.@@search πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.RegExp.@@species πŸ“‹Chrome5/25/2016 Firefox9/20/2016118
javascript.builtins.RegExp.@@split πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.Symbol.replace πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.Symbol.search πŸ“‹Chrome4/13/2016 Firefox9/20/2016160
javascript.builtins.Symbol.split πŸ“‹Chrome4/13/2016 Firefox9/20/2016160

2016/8

API First Browser Date Last Browser Date Days Notes
api.HTMLObjectElement.contentWindow πŸ“‹Firefox6/25/2013 Chrome8/31/20161163
api.MediaDevices.getSupportedConstraints πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getSupportedConstraints.return_object_property_deviceId πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getSupportedConstraints.return_object_property_echoCancellation πŸ“‹Firefox4/26/2016 Chrome8/31/2016127
api.MediaDevices.getSupportedConstraints.return_object_property_facingMode πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getSupportedConstraints.return_object_property_frameRate πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getSupportedConstraints.return_object_property_height πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getSupportedConstraints.return_object_property_width πŸ“‹Firefox1/26/2016 Chrome8/31/2016218
api.MediaDevices.getUserMedia πŸ“‹Firefox2/24/2015 Chrome8/31/2016554
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.MediaSource.sourceended_event πŸ“‹Firefox11/3/2015 Chrome8/31/2016302
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 Chrome8/31/2016302
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.getUserMedia πŸ“‹Firefox11/20/2012 Chrome8/31/20161380
api.SourceBuffer.abort_event πŸ“‹Firefox11/3/2015 Chrome8/31/2016302
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 Chrome8/31/2016302
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 Chrome8/31/2016302
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 Chrome8/31/2016302
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 Chrome8/31/2016302
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 Chrome8/31/2016302
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 Chrome8/31/2016302
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.
css.at-rules.font-face.OpenType_COLRv0 Firefox7/22/2014 Chrome8/31/2016771
css.properties.filter πŸ“‹Firefox1/13/2015 Chrome8/31/2016596
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.user-select.all Firefox11/9/2004 Chrome8/31/20164313
api.CSSKeyframeRule πŸ“‹Chrome11/12/2013 Firefox8/2/2016994
api.CSSKeyframesRule πŸ“‹Chrome11/12/2013 Firefox8/2/2016994
api.CanvasRenderingContext2D.ellipse πŸ“‹Chrome11/12/2013 Firefox8/2/2016994
api.CustomEvent.worker_support Chrome5/19/2015 Firefox8/2/2016441
api.Document.scrollingElement πŸ“‹Chrome7/21/2015 Firefox8/2/2016378
api.Element.animate πŸ“‹Chrome7/16/2014 Firefox8/2/2016748
api.Element.animate.options_id_parameter πŸ“‹Chrome4/13/2016 Firefox8/2/2016111
api.Element.insertAdjacentElement πŸ“‹Chrome12/11/2008 Firefox8/2/20162791
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“‹Chrome12/11/2008 Firefox8/2/20162791
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.MediaStream.clone πŸ“‹Chrome5/20/2014 Firefox8/2/2016805
api.MediaStreamTrack.clone πŸ“‹Chrome5/20/2014 Firefox8/2/2016805
api.Navigator.hardwareConcurrency πŸ“‹Chrome8/26/2014 Firefox8/2/2016707
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.Node.isSameNode πŸ“‹Chrome12/11/2008 Firefox8/2/20162791
api.Path2D.ellipse πŸ“‹Chrome7/16/2014 Firefox8/2/2016748
api.SubtleCrypto.worker_support Chrome8/26/2014 Firefox8/2/2016707
api.WorkerNavigator.hardwareConcurrency πŸ“‹Chrome8/26/2014 Firefox8/2/2016707
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.crypto.worker_support Chrome8/26/2014 Firefox8/2/2016707
css.properties.text-combine-upright πŸ“‹Chrome1/20/2016 Firefox8/2/2016195
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“‹Chrome1/20/2016 Firefox8/2/2016195
css.properties.text-combine-upright.none πŸ“‹Chrome1/20/2016 Firefox8/2/2016195
css.types.calc.nested Chrome5/25/2016 Firefox8/2/201669
css.types.calc.number_values Chrome11/12/2013 Firefox8/2/2016994
http.headers.Upgrade-Insecure-Requests πŸ“‹Chrome7/21/2015 Firefox8/2/2016378
javascript.builtins.Array.@@species πŸ“‹Chrome5/25/2016 Firefox8/2/201669
javascript.builtins.Array.@@unscopables πŸ“‹Chrome10/7/2014 Firefox8/2/2016665
javascript.builtins.ArrayBuffer.@@species πŸ“‹Chrome5/25/2016 Firefox8/2/201669
javascript.builtins.Promise.@@species πŸ“‹Chrome5/25/2016 Firefox8/2/201669
javascript.builtins.Symbol.isConcatSpreadable πŸ“‹Chrome1/20/2016 Firefox8/2/2016195
javascript.builtins.Symbol.unscopables πŸ“‹Chrome10/7/2014 Firefox8/2/2016665
javascript.builtins.TypedArray.@@species πŸ“‹Chrome5/25/2016 Firefox8/2/201669

2016/7

API First Browser Date Last Browser Date Days Notes
api.HTMLAnchorElement.toString πŸ“‹Firefox6/25/2013 Chrome7/20/20161121
api.IDBKeyRange.includes πŸ“‹Firefox6/7/2016 Chrome7/20/201643
api.ImageBitmap.close πŸ“‹Firefox4/26/2016 Chrome7/20/201685
api.Location.toString πŸ“‹Firefox6/25/2013 Chrome7/20/20161121
Internet Explorer: Intranet sites are set to Compatibility View, which will emulate IE7 and omit window.location.toString.
api.Request.referrerPolicy πŸ“‹Firefox6/7/2016 Chrome7/20/201643
api.Response.Response.accept_readablestream Firefox7/2/2015 Chrome7/20/2016384
css.properties.align-items.flex_context πŸ“‹Firefox4/2/2013 Chrome7/20/20161205
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.font-variant.css_fonts_shorthand Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant.none πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.all-petite-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.all-small-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.normal πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.petite-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.small-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.titling-caps πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-caps.unicase πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.diagonal-fractions πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.lining-nums πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.normal πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.oldstyle-nums πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.ordinal πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.proportional-nums πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.slashed-zero πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.stacked-fractions πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.font-variant-numeric.tabular-nums πŸ“‹Firefox12/1/2014 Chrome7/20/2016597
css.properties.justify-content.flex_context πŸ“‹Firefox4/2/2013 Chrome7/20/20161205
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-items πŸ“‹Firefox4/2/2013 Chrome7/20/20161205
css.properties.justify-items.center Firefox4/2/2013 Chrome7/20/20161205
css.properties.justify-items.flex_context πŸ“‹Firefox4/2/2013 Chrome7/20/20161205
css.properties.justify-items.left Firefox4/2/2013 Chrome7/20/20161205
css.properties.justify-items.legacy πŸ“‹Firefox4/2/2013 Chrome7/20/20161205
css.properties.justify-items.right Firefox4/2/2013 Chrome7/20/20161205
http.headers.Alt-Svc πŸ“‹Firefox5/12/2015 Chrome7/20/2016435
Firefox: Only supports draft-04Firefox for Android: Only supports draft-04
javascript.functions.arguments.@@iterator πŸ“‹Firefox4/26/2016 Chrome7/20/201685

2016/6

API First Browser Date Last Browser Date Days Notes
api.ANGLE_instanced_arrays πŸ“‹Chrome1/14/2014 Firefox6/7/2016875
Chrome: Available only on macOS.Opera: Available only on macOS.
api.ANGLE_instanced_arrays.drawArraysInstancedANGLE πŸ“‹Chrome10/1/2013 Firefox6/7/2016980
api.ANGLE_instanced_arrays.drawElementsInstancedANGLE πŸ“‹Chrome10/1/2013 Firefox6/7/2016980
api.ANGLE_instanced_arrays.vertexAttribDivisorANGLE πŸ“‹Chrome10/1/2013 Firefox6/7/2016980
api.DOMTokenList.value πŸ“‹Chrome4/13/2016 Firefox6/7/201655
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.EXT_blend_minmax πŸ“‹Chrome10/7/2014 Firefox6/7/2016609
Firefox: Not supported on Windows.
api.EXT_frag_depth πŸ“‹Chrome10/7/2014 Firefox6/7/2016609
api.EXT_shader_texture_lod πŸ“‹Chrome10/7/2014 Firefox6/7/2016609
api.EXT_texture_filter_anisotropic πŸ“‹Chrome4/8/2014 Firefox6/7/2016791
api.FormData.forEach Chrome4/13/2016 Firefox6/7/201655
api.Headers.forEach Chrome4/14/2015 Firefox6/7/2016420
api.MediaKeyStatusMap.forEach Chrome4/14/2015 Firefox6/7/2016420
api.Request.Request.init_referrer_parameter πŸ“‹Chrome12/1/2015 Firefox6/7/2016189
css.at-rules.media.display-mode πŸ“‹Chrome4/14/2015 Firefox6/7/2016420
css.at-rules.media.display-mode.browser πŸ“‹Chrome4/14/2015 Firefox6/7/2016420
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“‹Chrome12/1/2015 Firefox6/7/2016189
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.selectors.attribute.case_insensitive_modifier Chrome3/2/2016 Firefox6/7/201697
css.selectors.backdrop πŸ“‹Chrome8/26/2014 Firefox6/7/2016651

2016/5

API First Browser Date Last Browser Date Days Notes
api.CSSStyleDeclaration.@@iterator Firefox2/24/2015 Chrome5/25/2016456
api.Clients.get πŸ“‹Firefox3/8/2016 Chrome5/25/201678
api.ExtendableMessageEvent πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.ExtendableMessageEvent πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.data πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.lastEventId πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.origin πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.ports πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.ExtendableMessageEvent.source πŸ“‹Firefox1/26/2016 Chrome5/25/2016120
api.HTMLCanvasElement.captureStream πŸ“‹Firefox12/15/2015 Chrome5/25/2016162
api.KeyboardEvent.key πŸ“‹Firefox8/6/2013 Chrome5/25/20161023
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 Chrome5/25/2016421
api.KeyboardEvent.key.non_printable_keys Firefox8/6/2013 Chrome5/25/20161023
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 Chrome5/25/2016757
Internet Explorer: IE's implementation does not completely match the current spec because it is based on an older version of the spec.
api.NodeList.@@iterator πŸ“‹Firefox2/24/2015 Chrome5/25/2016456
api.RTCPeerConnection.createAnswer.returns_promise Firefox3/31/2015 Chrome5/25/2016421
api.RTCPeerConnection.createOffer.returns_promise Firefox3/31/2015 Chrome5/25/2016421
api.URL.searchParams πŸ“‹Firefox4/29/2014 Chrome5/25/2016757
Node.js: An object matching the URLSearchParams interface is returned, but it contains no data.
api.Window.beforeunload_event.generic_string_displayed Firefox1/26/2016 Chrome5/25/2016120
javascript.builtins.Map.@@species πŸ“‹Firefox9/22/2015 Chrome5/25/2016246
javascript.builtins.Set.@@species πŸ“‹Firefox9/22/2015 Chrome5/25/2016246
javascript.builtins.Symbol.species πŸ“‹Firefox9/22/2015 Chrome5/25/2016246

2016/4

API First Browser Date Last Browser Date Days Notes
api.Document.elementsFromPoint πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
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.FileReader.worker_support Chrome9/2/2010 Firefox4/26/20162063
api.History.scrollRestoration πŸ“‹Chrome10/13/2015 Firefox4/26/2016196
api.Navigator.permissions πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
api.Notification.requestPermission_static.returns_promise Chrome12/1/2015 Firefox4/26/2016147
api.PermissionStatus πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
api.PermissionStatus.change_event πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
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.PermissionStatus.state πŸ“‹Chrome7/21/2015 Firefox4/26/2016280
api.Permissions πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
api.Permissions.permission_geolocation Chrome5/19/2015 Firefox4/26/2016343
api.Permissions.permission_notifications Chrome5/19/2015 Firefox4/26/2016343
Firefox: Alias for the push permission (returns the same value).Firefox for Android: Alias for the push permission (returns the same value).
api.Permissions.permission_push Chrome5/19/2015 Firefox4/26/2016343
Firefox: Alias for the notifications permission (returns the same value).Firefox for Android: Alias for the notifications permission (returns the same value).
api.Permissions.query πŸ“‹Chrome5/19/2015 Firefox4/26/2016343
api.Request.mode.navigate_mode Chrome3/2/2016 Firefox4/26/201655
css.properties.text-emphasis.circle πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.currentColor πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.dot πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.double-circle πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.filled πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.none πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.open πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.sesame πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.transparent πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis.triangle πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis-color.currentColor πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
css.properties.text-emphasis-color.transparent πŸ“‹Chrome2/21/2013 Firefox4/26/20161160
javascript.builtins.RegExp.unicode πŸ“‹Chrome4/13/2016 Firefox4/26/201613
Edge: Case folding is implemented in version 13Node.js: Case folding is implemented in version 8.6.0
javascript.builtins.TypedArray.sort πŸ“‹Chrome9/1/2015 Firefox4/26/2016238
javascript.functions.block_level_functions Chrome3/2/2016 Firefox4/26/201655
javascript.regular_expressions.character_escape.unicode Chrome4/13/2016 Firefox4/26/201613
api.CanvasRenderingContext2D.drawImage.ImageBitmap_source_image Firefox11/3/2015 Chrome4/13/2016162
api.FormData.@@iterator Firefox1/26/2016 Chrome4/13/201678
api.FormData.delete πŸ“‹Firefox7/2/2015 Chrome4/13/2016286
api.FormData.entries Firefox1/26/2016 Chrome4/13/201678
api.FormData.get πŸ“‹Firefox7/2/2015 Chrome4/13/2016286
api.FormData.getAll πŸ“‹Firefox7/2/2015 Chrome4/13/2016286
api.FormData.has πŸ“‹Firefox7/2/2015 Chrome4/13/2016286
api.FormData.keys Firefox1/26/2016 Chrome4/13/201678
api.FormData.set πŸ“‹Firefox7/2/2015 Chrome4/13/2016286
api.FormData.values Firefox1/26/2016 Chrome4/13/201678
api.FormData.worker_support Firefox7/2/2015 Chrome4/13/2016286
api.HTMLCanvasElement.toBlob πŸ“‹Firefox1/8/2013 Chrome4/13/20161191
api.HTMLCanvasElement.toBlob.quality_parameter Firefox10/29/2013 Chrome4/13/2016897
api.HTMLCanvasElement.toBlob.type_parameter_jpeg Firefox1/8/2013 Chrome4/13/20161191
api.HTMLCanvasElement.toBlob.type_parameter_png Firefox1/8/2013 Chrome4/13/20161191
api.HTMLCanvasElement.toDataURL.type_parameter_jpeg Firefox1/8/2013 Chrome4/13/20161191
api.HTMLCanvasElement.toDataURL.type_parameter_png Firefox1/8/2013 Chrome4/13/20161191
api.HTMLLinkElement.relList πŸ“‹Firefox6/10/2014 Chrome4/13/2016673
api.ImageBitmap πŸ“‹Firefox11/3/2015 Chrome4/13/2016162
api.ImageBitmap.height πŸ“‹Firefox11/3/2015 Chrome4/13/2016162
api.ImageBitmap.width πŸ“‹Firefox11/3/2015 Chrome4/13/2016162
api.PushEvent.data πŸ“‹Firefox1/26/2016 Chrome4/13/201678
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 πŸ“‹Firefox1/26/2016 Chrome4/13/201678
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 Chrome4/13/201678
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 Chrome4/13/201678
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 Chrome4/13/201678
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 Chrome4/13/201678
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.RTCPeerConnection.addIceCandidate.returns_promise Firefox3/31/2015 Chrome4/13/2016379
api.RTCPeerConnection.setLocalDescription.returns_promise Firefox3/31/2015 Chrome4/13/2016379
api.RTCPeerConnection.setRemoteDescription.returns_promise Firefox3/31/2015 Chrome4/13/2016379
api.ServiceWorkerGlobalScope.notificationclose_event πŸ“‹Firefox1/26/2016 Chrome4/13/201678
Safari: Notifications are supported on macOS Ventura and later.
api.createImageBitmap πŸ“‹Firefox11/3/2015 Chrome4/13/2016162
css.properties.column-fill.auto πŸ“‹Firefox11/20/2012 Chrome4/13/20161240
css.properties.column-fill.balance πŸ“‹Firefox11/20/2012 Chrome4/13/20161240
css.properties.columns.auto πŸ“‹Firefox12/20/2011 Chrome4/13/20161576
http.headers.Accept-Encoding.br πŸ“‹Firefox1/26/2016 Chrome4/13/201678
Safari: Unsupported before macOS 10.13 High Sierra.
http.headers.Content-Encoding.br πŸ“‹Firefox1/26/2016 Chrome4/13/201678
Safari: Unsupported before macOS 10.13 High Sierra.
javascript.builtins.Generator.return πŸ“‹Firefox5/12/2015 Chrome4/13/2016337
javascript.builtins.Symbol.match πŸ“‹Firefox8/11/2015 Chrome4/13/2016246
javascript.statements.generator_function.not_constructable_with_new Firefox12/15/2015 Chrome4/13/2016120

2016/3

API First Browser Date Last Browser Date Days Notes
api.FetchEvent.clientId πŸ“‹Chrome3/2/2016 Firefox3/8/20166
api.HTMLElement.innerText πŸ“‹Chrome12/11/2008 Firefox3/8/20162644
api.HTMLScriptElement.innerText πŸ“‹Chrome12/11/2008 Firefox3/8/20162644
api.MediaKeyStatusMap.@@iterator Chrome4/14/2015 Firefox3/8/2016329
api.MediaKeyStatusMap.get πŸ“‹Chrome4/14/2015 Firefox3/8/2016329
api.MediaKeyStatusMap.has πŸ“‹Chrome4/14/2015 Firefox3/8/2016329
api.Window.storage_event πŸ“‹Chrome12/11/2008 Firefox3/8/20162644
http.headers.Content-Security-Policy.child-src πŸ“‹Chrome1/21/2015 Firefox3/8/2016412
http.headers.Content-Security-Policy.meta-element-support Chrome2/21/2013 Firefox3/8/20161111
javascript.classes πŸ“‹Chrome3/2/2016 Firefox3/8/20166
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“‹Chrome3/2/2016 Firefox3/8/20166
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“‹Chrome3/2/2016 Firefox3/8/20166
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“‹Chrome3/2/2016 Firefox3/8/20166
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“‹Chrome4/14/2015 Firefox3/8/2016329
javascript.operators.super πŸ“‹Chrome4/14/2015 Firefox3/8/2016329
javascript.statements.class πŸ“‹Chrome3/2/2016 Firefox3/8/20166
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.BaseAudioContext.decodeAudioData.returns_promise Firefox2/24/2015 Chrome3/2/2016372
api.BlobEvent πŸ“‹Firefox5/14/2013 Chrome3/2/20161023
api.BlobEvent.BlobEvent πŸ“‹Firefox5/14/2013 Chrome3/2/20161023
api.BlobEvent.data πŸ“‹Firefox5/14/2013 Chrome3/2/20161023
api.MediaRecorder.MediaRecorder.options_parameter Firefox12/15/2015 Chrome3/2/201678
api.MediaRecorder.dataavailable_event πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
api.MediaRecorder.error_event πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
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.mimeType πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
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 Chrome3/2/2016855
api.MediaRecorder.requestData πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
api.MediaRecorder.resume πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
api.MediaRecorder.start_event πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
api.MediaRecorder.state πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
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 Chrome3/2/2016855
api.MediaRecorder.stop_event πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
api.MediaRecorder.stream πŸ“‹Firefox10/29/2013 Chrome3/2/2016855
Chrome: Before Chrome 49, only video is supported, not audio.Chrome Android: Before Chrome Android 49, only video is supported, not audio.
api.RTCCertificate πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
api.RTCCertificate.expires πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
api.RTCPeerConnection.RTCPeerConnection.configuration_certificates_parameter πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
api.URLSearchParams πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
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 Chrome3/2/201636
api.URLSearchParams.URLSearchParams πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.URLSearchParams.USVString Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.append πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.delete πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
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.URLSearchParams.entries πŸ“‹Firefox1/26/2016 Chrome3/2/201636
api.URLSearchParams.forEach πŸ“‹Firefox1/26/2016 Chrome3/2/201636
api.URLSearchParams.get πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.getAll πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.has πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.keys πŸ“‹Firefox1/26/2016 Chrome3/2/201636
api.URLSearchParams.set πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.toString πŸ“‹Firefox4/29/2014 Chrome3/2/2016673
api.URLSearchParams.values πŸ“‹Firefox1/26/2016 Chrome3/2/201636
css.properties.custom-property πŸ“‹Firefox7/22/2014 Chrome3/2/2016589
css.properties.flex-grow.less_than_zero_animate Firefox9/2/2014 Chrome3/2/2016547
Firefox: Before Firefox 32, Firefox wasn't able to animate values starting or stopping at 0.Firefox for Android: Before Firefox for Android 32, Firefox for Android wasn't able to animate values starting or stopping at 0.
css.types.var πŸ“‹Firefox7/22/2014 Chrome3/2/2016589
javascript.builtins.Proxy πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.Proxy πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.apply πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.construct πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.defineProperty πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.deleteProperty πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.get πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.getOwnPropertyDescriptor πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.has πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Proxy.handler.isExtensible πŸ“‹Firefox7/22/2014 Chrome3/2/2016589
javascript.builtins.Proxy.handler.ownKeys πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
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 Chrome3/2/2016981
javascript.builtins.Proxy.handler.set πŸ“‹Firefox1/8/2013 Chrome3/2/20161149
javascript.builtins.Reflect πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.apply πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.construct πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.defineProperty πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.deleteProperty πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.get πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.getOwnPropertyDescriptor πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.getPrototypeOf πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.has πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.isExtensible πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.ownKeys πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.preventExtensions πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.set πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.Reflect.setPrototypeOf πŸ“‹Firefox11/3/2015 Chrome3/2/2016120
javascript.builtins.RegExp.flags πŸ“‹Firefox3/31/2015 Chrome3/2/2016337
javascript.builtins.RegExp.sticky πŸ“‹Firefox6/17/2008 Chrome3/2/20162815
javascript.builtins.RegExp.sticky.anchored_sticky_flag Firefox1/26/2016 Chrome3/2/201636
javascript.builtins.RegExp.sticky.prototype_accessor Firefox5/12/2015 Chrome3/2/2016295
javascript.functions.default_parameters πŸ“‹Firefox8/28/2012 Chrome3/2/20161282
javascript.functions.default_parameters.destructured_parameter_with_default_value_assignment Firefox9/22/2015 Chrome3/2/2016162
javascript.functions.default_parameters.parameters_without_defaults_after_default_parameters Firefox12/10/2013 Chrome3/2/2016813
javascript.operators.destructuring πŸ“‹Firefox9/22/2015 Chrome3/2/2016162
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.
javascript.operators.destructuring.computed_property_names Firefox9/22/2015 Chrome3/2/2016162
javascript.operators.destructuring.rest_in_arrays Firefox9/22/2015 Chrome3/2/2016162
javascript.operators.generator_function πŸ“‹Firefox12/10/2013 Chrome3/2/2016813
javascript.statements.generator_function.IteratorResult_object Firefox4/29/2014 Chrome3/2/2016673
javascript.statements.let πŸ“‹Firefox1/26/2016 Chrome3/2/201636
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.

2016/1

API First Browser Date Last Browser Date Days Notes
api.Cache.worker_support Chrome1/21/2015 Firefox1/26/2016370
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.worker_support Chrome5/19/2015 Firefox1/26/2016252
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.Client πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.Client.frameType πŸ“‹Chrome5/19/2015 Firefox1/26/2016252
api.Client.id πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.Client.postMessage πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.Client.url πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.Clients πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.Clients.claim πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.Clients.matchAll.options_includeUncontrolled_parameter πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome1/21/2015 Firefox1/26/2016370
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.Document.createAttribute πŸ“‹Chrome12/11/2008 Firefox1/26/20162602
Firefox: The parameter was not converted to its lowercase variant.Firefox for Android: The parameter was not converted to its lowercase variant.
api.ExtendableEvent πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ExtendableEvent.ExtendableEvent πŸ“‹Chrome3/3/2015 Firefox1/26/2016329
api.ExtendableEvent.waitUntil πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.FetchEvent πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.FetchEvent.FetchEvent πŸ“‹Chrome7/21/2015 Firefox1/26/2016189
api.FetchEvent.request πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.FetchEvent.respondWith πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.Headers.@@iterator Chrome4/14/2015 Firefox1/26/2016287
api.Headers.entries Chrome4/14/2015 Firefox1/26/2016287
api.Headers.keys Chrome4/14/2015 Firefox1/26/2016287
api.Headers.values Chrome4/14/2015 Firefox1/26/2016287
api.IDBIndex.getAll πŸ“‹Chrome1/20/2016 Firefox1/26/20166
api.IDBIndex.getAllKeys πŸ“‹Chrome1/20/2016 Firefox1/26/20166
api.IDBObjectStore.getAll πŸ“‹Chrome1/20/2016 Firefox1/26/20166
api.IDBObjectStore.getAllKeys πŸ“‹Chrome1/20/2016 Firefox1/26/20166
api.IDBObjectStore.openKeyCursor πŸ“‹Chrome11/6/2012 Firefox1/26/20161176
api.MediaStream.addTrack πŸ“‹Chrome3/26/2013 Firefox1/26/20161036
api.MediaStream.removeTrack πŸ“‹Chrome3/26/2013 Firefox1/26/20161036
api.Navigator.serviceWorker πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
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.NotificationEvent πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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.action πŸ“‹Chrome1/20/2016 Firefox1/26/20166
api.NotificationEvent.notification πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.PushEvent πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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.hasPermission Chrome4/14/2015 Firefox1/26/2016287
api.PushManager.permissionState πŸ“‹Chrome7/21/2015 Firefox1/26/2016189
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.register Chrome4/14/2015 Firefox1/26/2016287
api.PushManager.registrations Chrome4/14/2015 Firefox1/26/2016287
api.PushManager.subscribe πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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.PushManager.unregister Chrome4/14/2015 Firefox1/26/2016287
api.PushSubscription πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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“‹Chrome4/14/2015 Firefox1/26/2016287
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.RTCDataChannel.bufferedAmountLowThreshold πŸ“‹Chrome10/13/2015 Firefox1/26/2016105
api.RTCIceCandidate πŸ“‹Chrome11/6/2012 Firefox1/26/20161176
api.RTCIceCandidate.RTCIceCandidate πŸ“‹Chrome11/6/2012 Firefox1/26/20161176
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.RTCSessionDescription πŸ“‹Chrome11/6/2012 Firefox1/26/20161176
api.RTCSessionDescription.RTCSessionDescription Chrome11/6/2012 Firefox1/26/20161176
api.ServiceWorker πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorker.error_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorker.postMessage πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorker.scriptURL πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorker.state πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorker.statechange_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.controller πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.controllerchange_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.getRegistration πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.getRegistrations πŸ“‹Chrome9/1/2015 Firefox1/26/2016147
api.ServiceWorkerContainer.message_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.ready πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerContainer.register πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope.activate_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope.clients πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope.fetch_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope.install_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
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“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerGlobalScope.notificationclick_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
Safari: Notifications are supported on macOS Ventura and later.
api.ServiceWorkerGlobalScope.push_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
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.registration πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.ServiceWorkerGlobalScope.skipWaiting πŸ“‹Chrome3/3/2015 Firefox1/26/2016329
api.ServiceWorkerRegistration πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.active πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.getNotifications πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
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.installing πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.pushManager πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
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.scope πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.showNotification πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
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.unregister πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.update πŸ“‹Chrome9/1/2015 Firefox1/26/2016147
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.updatefound_event πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.ServiceWorkerRegistration.waiting πŸ“‹Chrome1/21/2015 Firefox1/26/2016370
api.WindowClient πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.WindowClient.focus πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.WindowClient.focused πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
api.WindowClient.visibilityState πŸ“‹Chrome4/14/2015 Firefox1/26/2016287
css.properties.text-orientation.sideways πŸ“‹Chrome6/7/2011 Firefox1/26/20161694
http.headers.Service-Worker πŸ“‹Chrome10/7/2014 Firefox1/26/2016476
javascript.builtins.Date.@@toPrimitive πŸ“‹Chrome12/1/2015 Firefox1/26/201656
javascript.builtins.Symbol.@@toPrimitive πŸ“‹Chrome12/1/2015 Firefox1/26/201656
javascript.builtins.Symbol.toPrimitive πŸ“‹Chrome12/1/2015 Firefox1/26/201656
api.FontFaceSet.@@iterator πŸ“‹Firefox9/22/2015 Chrome1/20/2016120
api.FontFaceSet.entries Firefox9/22/2015 Chrome1/20/2016120
api.FontFaceSet.keys Firefox9/22/2015 Chrome1/20/2016120
api.FontFaceSet.values Firefox9/22/2015 Chrome1/20/2016120
api.IDBTransaction.objectStoreNames πŸ“‹Firefox1/31/2012 Chrome1/20/20161450
api.KeyboardEvent.code πŸ“‹Firefox5/12/2015 Chrome1/20/2016253
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.key_parameter_accel Firefox9/2/2014 Chrome1/20/2016505
api.KeyboardEvent.getModifierState.key_parameter_altgraph Firefox8/28/2012 Chrome1/20/20161240
api.KeyboardEvent.getModifierState.key_parameter_capslock Firefox8/28/2012 Chrome1/20/20161240
api.KeyboardEvent.getModifierState.key_parameter_fn Firefox8/28/2012 Chrome1/20/20161240
api.KeyboardEvent.getModifierState.key_parameter_numlock Firefox8/28/2012 Chrome1/20/20161240
api.KeyboardEvent.getModifierState.key_parameter_os Firefox8/28/2012 Chrome1/20/20161240
api.KeyboardEvent.getModifierState.key_parameter_scrolllock Firefox8/28/2012 Chrome1/20/20161240
api.RTCPeerConnection.generateCertificate_static πŸ“‹Firefox6/25/2013 Chrome1/20/2016939
api.fetch.blob_data_support Firefox7/2/2015 Chrome1/20/2016202
css.properties.font-feature-settings πŸ“‹Firefox12/1/2014 Chrome1/20/2016415
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.text-orientation πŸ“‹Firefox9/22/2015 Chrome1/20/2016120
css.properties.text-orientation.mixed πŸ“‹Firefox9/22/2015 Chrome1/20/2016120
css.properties.writing-mode πŸ“‹Firefox9/22/2015 Chrome1/20/2016120
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.horizontal-tb Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.lr Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.lr-tb Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.rl Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.rl-tb Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.tb Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.tb-rl Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.vertical-lr Firefox12/15/2015 Chrome1/20/201636
css.properties.writing-mode.vertical-rl Firefox12/15/2015 Chrome1/20/201636
javascript.builtins.RegExp.global.prototype_accessor Firefox5/12/2015 Chrome1/20/2016253
javascript.builtins.RegExp.ignoreCase.prototype_accessor Firefox5/12/2015 Chrome1/20/2016253
javascript.builtins.RegExp.multiline.prototype_accessor Firefox5/12/2015 Chrome1/20/2016253
javascript.builtins.RegExp.source.prototype_accessor Firefox9/22/2015 Chrome1/20/2016120

2015/12

API First Browser Date Last Browser Date Days Notes
api.HTMLLinkElement.integrity πŸ“‹Chrome9/1/2015 Firefox12/15/2015105
api.HTMLScriptElement.integrity πŸ“‹Chrome9/1/2015 Firefox12/15/2015105
api.MediaKeySystemAccess.getConfiguration πŸ“‹Chrome4/14/2015 Firefox12/15/2015245
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.Request.redirect πŸ“‹Chrome10/13/2015 Firefox12/15/201563
Deno: Fetching with a "manual" redirect mode does not result in a "opaqueredirect" response, but a regular response.
api.Screen.orientation πŸ“‹Chrome10/7/2014 Firefox12/15/2015434
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“‹Chrome10/7/2014 Firefox12/15/2015434
api.ScreenOrientation.angle πŸ“‹Chrome10/7/2014 Firefox12/15/2015434
api.ScreenOrientation.change_event πŸ“‹Chrome10/7/2014 Firefox12/15/2015434
api.ScreenOrientation.type πŸ“‹Chrome10/7/2014 Firefox12/15/2015434
css.properties.transform-origin.svg_elements Chrome5/15/2012 Firefox12/15/20151309
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)" />).
html.elements.link.integrity πŸ“‹Chrome9/1/2015 Firefox12/15/2015105
html.elements.script.integrity πŸ“‹Chrome9/1/2015 Firefox12/15/2015105
javascript.builtins.Array.includes πŸ“‹Chrome12/1/2015 Firefox12/15/201514
javascript.builtins.TypedArray.includes πŸ“‹Chrome12/1/2015 Firefox12/15/201514
javascript.functions.method_definitions.generator_methods_not_constructable Chrome4/14/2015 Firefox12/15/2015245
api.Cache.matchAll πŸ“‹Firefox9/22/2015 Chrome12/1/201570
Opera: Requires HTTPS.
api.MediaDeviceInfo πŸ“‹Firefox7/2/2015 Chrome12/1/2015152
api.MediaDeviceInfo.deviceId πŸ“‹Firefox7/2/2015 Chrome12/1/2015152
api.MediaDeviceInfo.groupId πŸ“‹Firefox7/2/2015 Chrome12/1/2015152
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 Chrome12/1/2015152
api.MediaDeviceInfo.label πŸ“‹Firefox7/2/2015 Chrome12/1/2015152
api.MediaDeviceInfo.toJSON πŸ“‹Firefox11/3/2015 Chrome12/1/201528
api.MediaDevices πŸ“‹Firefox10/14/2014 Chrome12/1/2015413
api.MediaRecorder πŸ“‹Firefox10/29/2013 Chrome12/1/2015763
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 Chrome12/1/2015763
api.MediaRecorder.isTypeSupported_static πŸ“‹Firefox10/29/2013 Chrome12/1/2015763
api.MediaRecorder.start πŸ“‹Firefox10/29/2013 Chrome12/1/2015763
api.MouseEvent.getModifierState πŸ“‹Firefox8/28/2012 Chrome12/1/20151190
api.Navigator.mediaDevices πŸ“‹Firefox2/24/2015 Chrome12/1/2015280
css.properties.text-align-last.auto πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.center πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.end πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.justify πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.left πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.right πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
css.properties.text-align-last.start πŸ“‹Firefox4/24/2012 Chrome12/1/20151316
html.elements.rtc πŸ“‹Firefox10/14/2014 Chrome12/1/2015413
javascript.functions.rest_parameters πŸ“‹Firefox8/28/2012 Chrome12/1/20151190
javascript.operators.object_initializer.computed_property_names Firefox12/1/2014 Chrome12/1/2015365
javascript.operators.object_initializer.shorthand_method_names Firefox12/1/2014 Chrome12/1/2015365
javascript.operators.object_initializer.shorthand_property_names Firefox10/14/2014 Chrome12/1/2015413

2015/11

API First Browser Date Last Browser Date Days Notes
api.IDBCursorWithValue.worker_support Chrome11/6/2012 Firefox11/3/20151092
api.MediaSource πŸ“‹Chrome11/12/2013 Firefox11/3/2015721
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“‹Chrome11/12/2013 Firefox11/3/2015721
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.activeSourceBuffers πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.addSourceBuffer πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.duration πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.endOfStream πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
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“‹Chrome11/6/2012 Firefox11/3/20151092
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“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.removeSourceBuffer πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.MediaSource.sourceBuffers πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.RTCPeerConnection.RTCPeerConnection.configuration_bundlePolicy_parameter πŸ“‹Chrome4/14/2015 Firefox11/3/2015203
api.SourceBuffer πŸ“‹Chrome11/12/2013 Firefox11/3/2015721
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.abort πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendBuffer πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendWindowEnd πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.appendWindowStart πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.buffered πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.mode πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.remove πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.timestampOffset πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBuffer.updating πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.Safari on iOS: Exposed in Mobile Safari on iPad but not on iPhone.
api.SourceBufferList πŸ“‹Chrome11/12/2013 Firefox11/3/2015721
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“‹Chrome11/6/2012 Firefox11/3/20151092
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“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.creationTime πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.droppedVideoFrames πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.
api.VideoPlaybackQuality.totalVideoFrames πŸ“‹Chrome11/6/2012 Firefox11/3/20151092
Internet Explorer: Only works on Windows 8+.
http.headers.Content-Security-Policy.upgrade-insecure-requests πŸ“‹Chrome5/19/2015 Firefox11/3/2015168

2015/10

API First Browser Date Last Browser Date Days Notes
api.CSS.escape_static πŸ“‹Firefox7/22/2014 Chrome10/13/2015448
api.Cache.addAll πŸ“‹Firefox9/22/2015 Chrome10/13/201521
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.DOMException.DOMException πŸ“‹Firefox3/31/2015 Chrome10/13/2015196
api.DragEvent πŸ“‹Firefox6/30/2009 Chrome10/13/20152296
Internet Explorer: Before Internet Explorer 10, DragEvent is exposed in standards mode but not quirks mode.
api.DragEvent.DragEvent πŸ“‹Firefox6/30/2009 Chrome10/13/20152296
api.DragEvent.dataTransfer πŸ“‹Firefox6/30/2009 Chrome10/13/20152296
Internet Explorer: The value is always null.
api.Event.isTrusted πŸ“‹Firefox11/29/2005 Chrome10/13/20153605
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.Performance.clearResourceTimings πŸ“‹Firefox1/13/2015 Chrome10/13/2015273
api.Performance.resourcetimingbufferfull_event πŸ“‹Firefox1/13/2015 Chrome10/13/2015273
api.Performance.setResourceTimingBufferSize πŸ“‹Firefox1/13/2015 Chrome10/13/2015273
api.PerformanceEntry πŸ“‹Firefox1/13/2015 Chrome10/13/2015273
Node.js: Available as a part of the perf_hooks module.
html.elements.link.rel.preconnect πŸ“‹Firefox7/2/2015 Chrome10/13/2015103
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.
javascript.functions.get.computed_property_names Firefox12/1/2014 Chrome10/13/2015316
javascript.functions.set.computed_property_names Firefox12/1/2014 Chrome10/13/2015316
javascript.operators.new_target πŸ“‹Firefox9/22/2015 Chrome10/13/201521
javascript.operators.spread πŸ“‹Firefox10/9/2012 Chrome10/13/20151099
javascript.operators.spread.spread_in_arrays πŸ“‹Firefox10/9/2012 Chrome10/13/20151099
javascript.operators.spread.spread_in_function_calls πŸ“‹Firefox2/4/2014 Chrome10/13/2015616

2015/9

API First Browser Date Last Browser Date Days Notes
api.Cache πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
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“‹Chrome7/21/2015 Firefox9/22/201563
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.delete πŸ“‹Chrome5/19/2015 Firefox9/22/2015126
Deno: Doesn't support query options
api.Cache.keys πŸ“‹Chrome5/19/2015 Firefox9/22/2015126
api.Cache.match πŸ“‹Chrome5/19/2015 Firefox9/22/2015126
Deno: Doesn't support query options
api.Cache.put πŸ“‹Chrome5/19/2015 Firefox9/22/2015126
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.CacheStorage πŸ“‹Chrome5/19/2015 Firefox9/22/2015126
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“‹Chrome1/21/2015 Firefox9/22/2015244
api.CacheStorage.has πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
api.CacheStorage.keys πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
api.CacheStorage.open πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
api.Document.execCommand.copy Chrome4/14/2015 Firefox9/22/2015161
api.Document.execCommand.cut Chrome4/14/2015 Firefox9/22/2015161
api.Document.fonts πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.FontFace πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.family πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.load πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.loaded πŸ“‹Chrome8/26/2014 Firefox9/22/2015392
api.FontFace.status πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.stretch πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.style πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.unicodeRange πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.variant Chrome5/20/2014 Firefox9/22/2015490
api.FontFace.weight πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
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.add πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.clear πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.delete πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.forEach Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.has Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.load πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.loading_event πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.loadingdone_event πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.loadingerror_event πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.ready πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.size Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSet.status πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSetLoadEvent πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.FontFaceSetLoadEvent.fontfaces πŸ“‹Chrome5/20/2014 Firefox9/22/2015490
api.HTMLCanvasElement.getContext.webgl_context.options_failIfMajorPerformanceCaveat_parameter πŸ“‹Chrome2/20/2014 Firefox9/22/2015579
api.MediaStream.id πŸ“‹Chrome3/26/2013 Firefox9/22/2015910
api.MessageChannel πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
Node.js: Available as a part of the worker_threads module.
api.MessageChannel.MessageChannel πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
api.MessageChannel.port1 πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
api.MessageChannel.port2 πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
api.MessagePort πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
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“‹Chrome5/21/2009 Firefox9/22/20152315
api.MessagePort.message_event πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
Node.js: Supports the event, but only via Node EventEmitter.
api.MessagePort.postMessage πŸ“‹Chrome5/21/2009 Firefox9/22/20152315
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“‹Chrome5/21/2009 Firefox9/22/20152315
api.MessagePort.worker_support Chrome1/25/2010 Firefox9/22/20152066
api.MouseEvent.movementX πŸ“‹Chrome8/26/2014 Firefox9/22/2015392
api.MouseEvent.movementY πŸ“‹Chrome8/26/2014 Firefox9/22/2015392
api.Notification.worker_support Chrome4/14/2015 Firefox9/22/2015161
api.caches πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
api.caches.worker_support Chrome1/21/2015 Firefox9/22/2015244
css.properties.block-size.auto πŸ“‹Chrome12/2/2010 Firefox9/22/20151755
css.properties.inline-size.auto πŸ“‹Chrome12/2/2010 Firefox9/22/20151755
css.properties.text-orientation.upright πŸ“‹Chrome6/7/2011 Firefox9/22/20151568
http.headers.Content-Security-Policy.manifest-src πŸ“‹Chrome1/21/2015 Firefox9/22/2015244
api.CSSGroupingRule πŸ“‹Firefox4/2/2013 Chrome9/1/2015882
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.CSSGroupingRule.cssRules πŸ“‹Firefox4/2/2013 Chrome9/1/2015882
api.CSSGroupingRule.deleteRule πŸ“‹Firefox4/2/2013 Chrome9/1/2015882
api.CSSGroupingRule.insertRule πŸ“‹Firefox4/2/2013 Chrome9/1/2015882
api.PerformanceEntry.toJSON πŸ“‹Firefox1/13/2015 Chrome9/1/2015231
api.PerformanceResourceTiming.toJSON πŸ“‹Firefox1/13/2015 Chrome9/1/2015231
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter πŸ“‹Firefox6/25/2013 Chrome9/1/2015798
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.credential_parameter πŸ“‹Firefox6/25/2013 Chrome9/1/2015798
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.url_parameter Firefox6/25/2013 Chrome9/1/2015798
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.urls_parameter πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
api.RTCPeerConnection.RTCPeerConnection.configuration_iceServers_parameter.username_parameter πŸ“‹Firefox8/6/2013 Chrome9/1/2015756
api.SVGFESpecularLightingElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Chrome9/1/20152632
api.SVGFESpecularLightingElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Chrome9/1/20152632
css.at-rules.keyframes.ignore_important_declarations Firefox2/19/2013 Chrome9/1/2015924
css.properties.list-style-type.ethiopic-halehame Firefox11/9/2004 Chrome9/1/20153948
css.properties.list-style-type.ethiopic-halehame-am Firefox11/9/2004 Chrome9/1/20153948
css.properties.list-style-type.korean-hangul-formal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.korean-hanja-formal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.korean-hanja-informal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.simp-chinese-formal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.simp-chinese-informal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.trad-chinese-formal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
css.properties.list-style-type.trad-chinese-informal πŸ“‹Firefox3/18/2014 Chrome9/1/2015532
javascript.builtins.Array.copyWithin πŸ“‹Firefox9/2/2014 Chrome9/1/2015364
javascript.builtins.Array.fill πŸ“‹Firefox7/22/2014 Chrome9/1/2015406
javascript.builtins.Array.find πŸ“‹Firefox10/29/2013 Chrome9/1/2015672
javascript.builtins.Array.findIndex πŸ“‹Firefox10/29/2013 Chrome9/1/2015672
javascript.builtins.Array.from πŸ“‹Firefox9/2/2014 Chrome9/1/2015364
javascript.builtins.Array.of πŸ“‹Firefox10/29/2013 Chrome9/1/2015672
javascript.builtins.Object.assign πŸ“‹Firefox12/1/2014 Chrome9/1/2015274
javascript.builtins.TypedArray.copyWithin πŸ“‹Firefox12/1/2014 Chrome9/1/2015274
javascript.builtins.TypedArray.entries πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.every πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.fill πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.filter πŸ“‹Firefox5/12/2015 Chrome9/1/2015112
javascript.builtins.TypedArray.find πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.findIndex πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.forEach πŸ“‹Firefox5/12/2015 Chrome9/1/2015112
javascript.builtins.TypedArray.from πŸ“‹Firefox5/12/2015 Chrome9/1/2015112
javascript.builtins.TypedArray.indexOf πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
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 Chrome9/1/2015154
javascript.builtins.TypedArray.lastIndexOf πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
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 Chrome9/1/2015112
javascript.builtins.TypedArray.of πŸ“‹Firefox5/12/2015 Chrome9/1/2015112
javascript.builtins.TypedArray.reduce πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.reduceRight πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.reverse πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.builtins.TypedArray.slice πŸ“‹Firefox5/12/2015 Chrome9/1/2015112
javascript.builtins.TypedArray.some πŸ“‹Firefox3/31/2015 Chrome9/1/2015154
javascript.functions.arrow_functions πŸ“‹Firefox6/25/2013 Chrome9/1/2015798
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.

2015/8

API First Browser Date Last Browser Date Days Notes
api.AudioBufferSourceNode.detune πŸ“‹Chrome7/21/2015 Firefox8/11/201521
api.AudioContext.close πŸ“‹Chrome4/14/2015 Firefox8/11/2015119
api.AudioContext.resume πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
api.AudioContext.suspend πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
api.BaseAudioContext.state πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
api.BaseAudioContext.statechange_event πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
api.OfflineAudioContext.resume πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
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.
css.properties.text-align.match-parent πŸ“‹Chrome12/13/2011 Firefox8/11/20151337
css.types.flex πŸ“‹Chrome8/20/2013 Firefox8/11/2015721
http.headers.Service-Worker-Allowed πŸ“‹Chrome4/14/2015 Firefox8/11/2015119
javascript.builtins.String.includes πŸ“‹Chrome3/3/2015 Firefox8/11/2015161
javascript.builtins.String.unicode_code_point_escapes Chrome12/11/2008 Firefox8/11/20152434
javascript.grammar.unicode_point_escapes πŸ“‹Chrome7/21/2015 Firefox8/11/201521

2015/7

API First Browser Date Last Browser Date Days Notes
api.Notification.data πŸ“‹Firefox12/1/2014 Chrome7/21/2015232
api.PerformanceTiming.toJSON πŸ“‹Firefox10/29/2013 Chrome7/21/2015630
api.Response.redirect_static πŸ“‹Firefox7/2/2015 Chrome7/21/201519
css.properties.word-break.keep-all πŸ“‹Firefox8/28/2012 Chrome7/21/20151057
javascript.builtins.Object.preventExtensions.ES2015_behavior Firefox1/13/2015 Chrome7/21/2015189
api.Headers πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Headers.Headers πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Headers.append πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Headers.delete πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Headers.get πŸ“‹Chrome4/14/2015 Firefox7/2/201579
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“‹Chrome4/14/2015 Firefox7/2/201579
api.Headers.set πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.MouseEvent.offsetX πŸ“‹Chrome12/11/2008 Firefox7/2/20152394
api.MouseEvent.offsetY πŸ“‹Chrome12/11/2008 Firefox7/2/20152394
api.Request πŸ“‹Chrome4/14/2015 Firefox7/2/201579
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“‹Chrome1/21/2015 Firefox7/2/2015162
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.arrayBuffer πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Request.blob πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Request.bodyUsed πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Request.clone πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.credentials πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.headers πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.json πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Request.method πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.mode πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.referrer πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Request.text πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Request.url πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
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“‹Chrome4/14/2015 Firefox7/2/201579
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“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.arrayBuffer πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.blob πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.bodyUsed πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.clone πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.error_static πŸ“‹Chrome5/19/2015 Firefox7/2/201544
api.Response.headers πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.json πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.ok πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.status πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.statusText πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.text πŸ“‹Chrome4/14/2015 Firefox7/2/201579
api.Response.type πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.Response.url πŸ“‹Chrome1/21/2015 Firefox7/2/2015162
api.console.clear_static πŸ“‹Chrome2/21/2013 Firefox7/2/2015861
api.console.dirxml_static πŸ“‹Chrome5/21/2009 Firefox7/2/20152233
Node.js: Does not use Logger to log data.
api.fetch πŸ“‹Chrome4/14/2015 Firefox7/2/201579
Deno: Fetching with a "manual" redirect mode does not result in a "opaqueredirect" response, but a regular response.
css.at-rules.font-face.WOFF_2 πŸ“‹Chrome7/16/2014 Firefox7/2/2015351
Safari: Supported only on macOS 10.12 (Sierra) and later.

2015/5

API First Browser Date Last Browser Date Days Notes
api.AnimationEvent πŸ“‹Firefox6/21/2011 Chrome5/19/20151428
api.AnimationEvent.AnimationEvent πŸ“‹Firefox8/6/2013 Chrome5/19/2015651
api.AnimationEvent.animationName πŸ“‹Firefox6/21/2011 Chrome5/19/20151428
api.AnimationEvent.elapsedTime πŸ“‹Firefox6/21/2011 Chrome5/19/20151428
api.AudioBuffer.copyFromChannel πŸ“‹Firefox2/4/2014 Chrome5/19/2015469
api.AudioBuffer.copyToChannel πŸ“‹Firefox2/4/2014 Chrome5/19/2015469
api.MouseEvent.buttons πŸ“‹Firefox8/28/2012 Chrome5/19/2015994
Firefox: Restrictions apply depending on OS.
api.PerformanceResourceTiming.connectEnd πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.connectStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.domainLookupEnd πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.domainLookupStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.fetchStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.initiatorType πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
Node.js: Since v18.2.0, the value can be returned by toJSON(), but can not accessed via property getter.
api.PerformanceResourceTiming.redirectEnd πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.redirectStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.requestStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.responseEnd πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.responseStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.PerformanceResourceTiming.secureConnectionStart πŸ“‹Firefox1/13/2015 Chrome5/19/2015126
api.RTCIceCandidate.toJSON πŸ“‹Firefox2/4/2014 Chrome5/19/2015469
api.RTCSessionDescription.toJSON πŸ“‹Firefox9/17/2013 Chrome5/19/2015609
css.at-rules.keyframes πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
css.properties.animation πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
WebView Android: The animation-fill-mode property is not supported in Android browsers below 2.3.
css.properties.animation-delay πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
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 Chrome5/19/2015952
css.properties.animation-duration πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
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 Chrome5/19/2015952
css.properties.animation-iteration-count πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
css.properties.animation-name πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
css.properties.animation-play-state πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
css.properties.animation-timing-function πŸ“‹Firefox10/9/2012 Chrome5/19/2015952
css.types.number.scientific_notation Firefox4/29/2014 Chrome5/19/2015385
javascript.builtins.Function.length.configurable_true Firefox3/31/2015 Chrome5/19/201549
javascript.builtins.Function.name.configurable_true Firefox5/12/2015 Chrome5/19/20157
javascript.builtins.Set.@@iterator πŸ“‹Firefox2/24/2015 Chrome5/19/201584
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.Symbol.iterator πŸ“‹Firefox2/24/2015 Chrome5/19/201584
javascript.grammar.shorthand_object_literals Firefox10/14/2014 Chrome5/19/2015217
api.HTMLImageElement.currentSrc πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
api.HTMLImageElement.sizes πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
api.HTMLImageElement.srcset πŸ“‹Chrome4/8/2014 Firefox5/12/2015399
api.HTMLMediaElement.encrypted_event πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.HTMLMediaElement.mediaKeys πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.HTMLMediaElement.setMediaKeys πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.HTMLPictureElement πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
api.HTMLSourceElement.sizes πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
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“‹Chrome10/7/2014 Firefox5/12/2015217
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.MediaEncryptedEvent πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaEncryptedEvent.MediaEncryptedEvent πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaEncryptedEvent.initData πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaEncryptedEvent.initDataType πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyMessageEvent πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyMessageEvent.MediaKeyMessageEvent πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyMessageEvent.message πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyMessageEvent.messageType πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.close πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.closed πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.expiration πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.generateRequest πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.keyStatuses πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.load πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.remove πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.sessionId πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySession.update πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyStatusMap πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyStatusMap.entries Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyStatusMap.keys Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyStatusMap.size πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeyStatusMap.values Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySystemAccess πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySystemAccess.createMediaKeys πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeySystemAccess.keySystem πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeys πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeys.createSession πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.MediaKeys.setServerCertificate πŸ“‹Chrome4/14/2015 Firefox5/12/201528
api.Navigator.requestMediaKeySystemAccess πŸ“‹Chrome4/14/2015 Firefox5/12/201528
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.Performance.clearMarks πŸ“‹Chrome8/20/2013 Firefox5/12/2015630
api.Performance.clearMeasures πŸ“‹Chrome8/20/2013 Firefox5/12/2015630
api.Performance.mark πŸ“‹Chrome7/9/2013 Firefox5/12/2015672
api.Performance.measure πŸ“‹Chrome7/9/2013 Firefox5/12/2015672
api.PerformanceMark πŸ“‹Chrome7/9/2013 Firefox5/12/2015672
Node.js: Available as a part of the perf_hooks module.
api.PerformanceMeasure πŸ“‹Chrome2/21/2013 Firefox5/12/2015810
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.RTCPeerConnection.negotiationneeded_event πŸ“‹Chrome1/10/2013 Firefox5/12/2015852
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.
html.elements.img.sizes πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
html.elements.img.srcset πŸ“‹Chrome4/8/2014 Firefox5/12/2015399
html.elements.picture πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
html.elements.rb πŸ“‹Chrome5/25/2010 Firefox5/12/20151813
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“‹Chrome5/25/2010 Firefox5/12/20151813
html.elements.rt πŸ“‹Chrome5/25/2010 Firefox5/12/20151813
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“‹Chrome5/25/2010 Firefox5/12/20151813
html.elements.source.sizes πŸ“‹Chrome10/7/2014 Firefox5/12/2015217
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“‹Chrome10/7/2014 Firefox5/12/2015217
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).
javascript.builtins.RegExp.source.empty_regex_string Chrome9/2/2010 Firefox5/12/20151713

2015/4

API First Browser Date Last Browser Date Days Notes
api.DOMTokenList.@@iterator Firefox2/24/2015 Chrome4/14/201549
api.Navigator.registerProtocolHandler.scheme_parameter_openpgp4fpr Firefox10/24/2006 Chrome4/14/20153094
api.OfflineAudioContext.startRendering.returns_promise Firefox3/31/2015 Chrome4/14/201514

2015/3

API First Browser Date Last Browser Date Days Notes
api.BaseAudioContext.createStereoPanner πŸ“‹Chrome3/3/2015 Firefox3/31/201528
api.IDBCursor.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBDatabase.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBFactory.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBIndex.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBKeyRange.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBObjectStore.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBOpenDBRequest.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBRequest.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBTransaction.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.IDBVersionChangeEvent.worker_support Chrome11/6/2012 Firefox3/31/2015875
api.StereoPannerNode πŸ“‹Chrome3/3/2015 Firefox3/31/201528
api.StereoPannerNode.pan πŸ“‹Chrome3/3/2015 Firefox3/31/201528
api.WebSocket.worker_support Chrome5/25/2010 Firefox3/31/20151771
api.indexedDB.worker_support Chrome1/10/2013 Firefox3/31/2015810
javascript.builtins.Map.Map.null_allowed Chrome10/7/2014 Firefox3/31/2015175
javascript.builtins.Set.Set.null_allowed Chrome10/7/2014 Firefox3/31/2015175
javascript.builtins.TypedArray.keys πŸ“‹Chrome10/7/2014 Firefox3/31/2015175
javascript.builtins.TypedArray.values πŸ“‹Chrome10/7/2014 Firefox3/31/2015175
javascript.builtins.WeakMap.WeakMap.null_allowed Chrome7/16/2014 Firefox3/31/2015258
javascript.builtins.WeakSet.WeakSet.null_allowed Chrome7/16/2014 Firefox3/31/2015258
api.CSSKeyframesRule.appendRule πŸ“‹Firefox5/14/2013 Chrome3/3/2015658
api.ClipboardEvent πŸ“‹Firefox6/25/2013 Chrome3/3/2015616
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.clipboardData πŸ“‹Firefox6/25/2013 Chrome3/3/2015616
api.Element.closest πŸ“‹Firefox1/13/2015 Chrome3/3/201549
api.IDBVersionChangeEvent.IDBVersionChangeEvent πŸ“‹Firefox10/29/2013 Chrome3/3/2015490
api.Navigator.registerProtocolHandler.scheme_parameter_ssh Firefox10/24/2006 Chrome3/3/20153052
api.SubtleCrypto.deriveBits πŸ“‹Firefox12/1/2014 Chrome3/3/201592
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 Chrome3/3/201592
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 Chrome3/3/201592
api.SubtleCrypto.deriveKey.derivedKeyAlgorithm_option_hmac πŸ“‹Firefox12/1/2014 Chrome3/3/201592
api.SubtleCrypto.digest πŸ“‹Firefox12/1/2014 Chrome3/3/201592
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.Window.scroll.options_left_parameter Firefox2/24/2015 Chrome3/3/20157
api.Window.scroll.options_top_parameter Firefox2/24/2015 Chrome3/3/20157
api.Window.scrollBy.options_left_parameter Firefox2/24/2015 Chrome3/3/20157
api.Window.scrollBy.options_top_parameter Firefox2/24/2015 Chrome3/3/20157
api.Window.scrollTo.options_left_parameter Firefox2/24/2015 Chrome3/3/20157
api.Window.scrollTo.options_top_parameter Firefox2/24/2015 Chrome3/3/20157
css.properties.isolation πŸ“‹Firefox2/24/2015 Chrome3/3/20157
css.properties.isolation.auto πŸ“‹Firefox2/24/2015 Chrome3/3/20157
css.properties.isolation.isolate πŸ“‹Firefox2/24/2015 Chrome3/3/20157
css.properties.mix-blend-mode πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.color πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.color-burn πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.color-dodge πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.darken πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.difference πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.exclusion πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.hard-light πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.hue πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.lighten πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.luminosity πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.multiply πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.normal πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.overlay πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.saturation πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.screen πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.soft-light πŸ“‹Firefox9/2/2014 Chrome3/3/2015182
css.properties.mix-blend-mode.svg_elements Firefox9/2/2014 Chrome3/3/2015182
css.types.global_keywords.unset πŸ“‹Firefox2/4/2014 Chrome3/3/2015392
javascript.builtins.String.codePointAt πŸ“‹Firefox4/29/2014 Chrome3/3/2015308
javascript.builtins.String.endsWith πŸ“‹Firefox11/20/2012 Chrome3/3/2015833
javascript.builtins.String.fromCodePoint πŸ“‹Firefox4/29/2014 Chrome3/3/2015308
javascript.builtins.String.raw πŸ“‹Firefox12/1/2014 Chrome3/3/201592
javascript.builtins.String.repeat πŸ“‹Firefox9/17/2013 Chrome3/3/2015532
javascript.builtins.String.startsWith πŸ“‹Firefox11/20/2012 Chrome3/3/2015833
javascript.grammar.binary_numeric_literals πŸ“‹Firefox10/29/2013 Chrome3/3/2015490
javascript.grammar.octal_numeric_literals πŸ“‹Firefox10/29/2013 Chrome3/3/2015490
javascript.grammar.template_literals πŸ“‹Firefox12/1/2014 Chrome3/3/201592

2015/2

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.resetTransform πŸ“‹Chrome11/12/2013 Firefox2/24/2015469
api.RTCPeerConnection.signalingstatechange_event πŸ“‹Chrome7/9/2013 Firefox2/24/2015595
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.TextDecoder.fatal πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
css.at-rules.font-face.unicode-range πŸ“‹Chrome12/11/2008 Firefox2/24/20152266
css.properties.object-fit πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
Edge: Only supported for <img> elements.
css.properties.object-fit.contain πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-fit.cover πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-fit.fill πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-fit.none πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-fit.scale-down πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-position πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
Edge: Only supported for <img> elements.
css.properties.object-position.bottom πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-position.center πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-position.left πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-position.right πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.object-position.top πŸ“‹Chrome1/14/2014 Firefox2/24/2015406
css.properties.white-space.textarea_support Chrome12/11/2008 Firefox2/24/20152266
css.properties.will-change πŸ“‹Chrome7/16/2014 Firefox2/24/2015223
css.properties.will-change.auto πŸ“‹Chrome7/16/2014 Firefox2/24/2015223
css.properties.will-change.contents πŸ“‹Chrome7/16/2014 Firefox2/24/2015223
css.properties.will-change.scroll-position πŸ“‹Chrome7/16/2014 Firefox2/24/2015223
css.types.gradient.linear-gradient.interpolation_hints Chrome1/21/2015 Firefox2/24/201534
css.types.gradient.linear-gradient.premultiplied_gradients Chrome8/20/2013 Firefox2/24/2015553
css.types.gradient.radial-gradient.interpolation_hints Chrome1/21/2015 Firefox2/24/201534
css.types.gradient.radial-gradient.premultiplied_gradients Chrome8/20/2013 Firefox2/24/2015553
css.types.gradient.repeating-linear-gradient.interpolation_hints Chrome1/21/2015 Firefox2/24/201534
css.types.gradient.repeating-radial-gradient.interpolation_hints Chrome1/21/2015 Firefox2/24/201534
html.elements.meta.name.referrer πŸ“‹Chrome2/8/2012 Firefox2/24/20151112
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.
http.headers.Content-Security-Policy.form-action πŸ“‹Chrome1/21/2015 Firefox2/24/201534
javascript.builtins.Array.@@iterator πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
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.Iterator.@@iterator πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
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“‹Chrome10/7/2014 Firefox2/24/2015140
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.Object.getOwnPropertySymbols πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
javascript.builtins.String.@@iterator πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
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.Symbol πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
Edge: Edge 12 included Symbol properties in JSON.stringify() output.
javascript.builtins.Symbol.Symbol πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
javascript.builtins.Symbol.for πŸ“‹Chrome1/21/2015 Firefox2/24/201534
javascript.builtins.Symbol.keyFor πŸ“‹Chrome1/21/2015 Firefox2/24/201534
javascript.builtins.Symbol.toString πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
javascript.builtins.Symbol.valueOf πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
javascript.builtins.TypedArray.@@iterator πŸ“‹Chrome10/7/2014 Firefox2/24/2015140
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.WeakMap.WeakMap.iterable_allowed Chrome10/7/2014 Firefox2/24/2015140
javascript.statements.const πŸ“‹Chrome7/31/2012 Firefox2/24/2015938
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
css.selectors.invalid.form Firefox6/5/2012 Chrome1/21/2015960
css.selectors.valid.form Firefox6/5/2012 Chrome1/21/2015960
http.headers.Content-Security-Policy.base-uri πŸ“‹Firefox1/13/2015 Chrome1/21/20158
api.Performance.getEntries πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.Performance.getEntriesByName πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.Performance.getEntriesByType πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.PerformanceEntry.duration πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.PerformanceEntry.entryType πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.PerformanceEntry.name πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.PerformanceEntry.startTime πŸ“‹Chrome7/9/2013 Firefox1/13/2015553
api.PerformanceResourceTiming πŸ“‹Chrome8/20/2013 Firefox1/13/2015511
Node.js: Available as a part of the perf_hooks module.Node.js: Available as a part of the perf_hooks module.
api.SVGFEFloodElement.height πŸ“‹Chrome5/25/2010 Firefox1/13/20151694
api.SVGFEFloodElement.result πŸ“‹Chrome5/25/2010 Firefox1/13/20151694
api.SVGFEFloodElement.width πŸ“‹Chrome5/25/2010 Firefox1/13/20151694
api.SVGFEFloodElement.x πŸ“‹Chrome5/25/2010 Firefox1/13/20151694
api.SVGFEFloodElement.y πŸ“‹Chrome5/25/2010 Firefox1/13/20151694
css.properties.filter.blur πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.brightness πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.contrast πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.drop-shadow πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.grayscale πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.hue-rotate πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.invert πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.none πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.opacity πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.filter.saturate πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
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“‹Chrome3/28/2012 Firefox1/13/20151021
css.properties.mask-type πŸ“‹Chrome1/10/2013 Firefox1/13/2015733
css.properties.mask-type.alpha πŸ“‹Chrome1/10/2013 Firefox1/13/2015733
css.properties.mask-type.luminance πŸ“‹Chrome1/10/2013 Firefox1/13/2015733
css.types.filter-function πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.blur πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.brightness πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.contrast πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.drop-shadow πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.grayscale πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.hue-rotate πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.invert πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.opacity πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.saturate πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
css.types.filter-function.sepia πŸ“‹Chrome3/28/2012 Firefox1/13/20151021
html.elements.body.bottommargin Chrome12/11/2008 Firefox1/13/20152224
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 Chrome12/11/2008 Firefox1/13/20152224
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 Chrome12/11/2008 Firefox1/13/20152224
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 Chrome12/11/2008 Firefox1/13/20152224
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.Crypto.subtle πŸ“‹Chrome8/26/2014 Firefox12/1/201497
api.CryptoKey πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Node.js: Available as a part of the crypto module.
api.CryptoKey.algorithm πŸ“‹Chrome8/26/2014 Firefox12/1/201497
api.CryptoKey.extractable πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Deno: The only supported value for this property is true.
api.CryptoKey.type πŸ“‹Chrome8/26/2014 Firefox12/1/201497
api.CryptoKey.usages πŸ“‹Chrome8/26/2014 Firefox12/1/201497
api.Element.matches πŸ“‹Chrome2/20/2014 Firefox12/1/2014284
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.MediaStream.getTracks πŸ“‹Chrome10/7/2014 Firefox12/1/201455
api.MediaStreamTrack.stop πŸ“‹Chrome1/14/2014 Firefox12/1/2014321
api.NamedNodeMap πŸ“‹Chrome12/11/2008 Firefox12/1/20142181
api.SubtleCrypto πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Node.js: Available as a part of the crypto module.
api.SubtleCrypto.decrypt πŸ“‹Chrome8/26/2014 Firefox12/1/201497
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.encrypt πŸ“‹Chrome8/26/2014 Firefox12/1/201497
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“‹Chrome8/26/2014 Firefox12/1/201497
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“‹Chrome8/26/2014 Firefox12/1/201497
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“‹Chrome8/26/2014 Firefox12/1/201497
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“‹Chrome8/26/2014 Firefox12/1/201497
Deno: P-384 supported. Not supported: P-256, P-521.
api.SubtleCrypto.importKey.ECDSA πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Deno: P-384 supported. Not supported: P-256, P-521.
api.SubtleCrypto.sign πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Edge: Not supported: RSA-PSS, ECDSA.Internet Explorer: Returns CryptoOperation instead of PromiseNode.js: Supports: NODE-DSA
api.SubtleCrypto.unwrapKey πŸ“‹Chrome8/26/2014 Firefox12/1/201497
Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of PromiseNode.js: Supports: NODE-DSANode.js: Supports: NODE-DH
api.SubtleCrypto.verify πŸ“‹Chrome8/26/2014 Firefox12/1/201497
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“‹Chrome8/26/2014 Firefox12/1/201497
Edge: Not supported: AES-CTR.Internet Explorer: Returns KeyOperation instead of Promise
api.console.table_static πŸ“‹Chrome5/21/2013 Firefox12/1/2014559
api.performance.worker_support Chrome10/1/2013 Firefox12/1/2014426
Node.js: Available as a part of the perf_hooks module.
css.properties.font-variant-ligatures πŸ“‹Chrome4/8/2014 Firefox12/1/2014237
css.properties.font-variant-ligatures.common-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.contextual πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.discretionary-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.historical-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.no-common-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.no-contextual πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.no-discretionary-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.no-historical-ligatures πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.none πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.font-variant-ligatures.normal πŸ“‹Chrome11/12/2013 Firefox12/1/2014384
css.properties.min-height.auto Chrome7/31/2012 Firefox12/1/2014853
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 Chrome7/31/2012 Firefox12/1/2014853
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.builtins.WeakSet πŸ“‹Chrome7/16/2014 Firefox12/1/2014138
javascript.builtins.WeakSet.WeakSet πŸ“‹Chrome7/16/2014 Firefox12/1/2014138
javascript.builtins.WeakSet.WeakSet.iterable_allowed Chrome10/7/2014 Firefox12/1/201455
javascript.builtins.WeakSet.add πŸ“‹Chrome7/16/2014 Firefox12/1/2014138
javascript.builtins.WeakSet.delete πŸ“‹Chrome7/16/2014 Firefox12/1/2014138
javascript.builtins.WeakSet.has πŸ“‹Chrome7/16/2014 Firefox12/1/2014138
javascript.functions.method_definitions πŸ“‹Chrome11/18/2014 Firefox12/1/201413

2014/11

API First Browser Date Last Browser Date Days Notes
api.Navigator.sendBeacon πŸ“‹Firefox7/22/2014 Chrome11/18/2014119
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.
javascript.builtins.Generator πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
javascript.builtins.Generator.next πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
javascript.builtins.Generator.throw πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
javascript.builtins.GeneratorFunction πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
javascript.builtins.GeneratorFunction.GeneratorFunction πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
javascript.operators.yield πŸ“‹Firefox12/10/2013 Chrome11/18/2014343
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 Chrome11/18/2014287
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.statements.generator_function πŸ“‹Firefox12/10/2013 Chrome11/18/2014343

2014/10

API First Browser Date Last Browser Date Days Notes
api.AudioTrack πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrack.enabled πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrack.id πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrack.kind πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrack.label πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrack.language πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList.addtrack_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList.change_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList.getTrackById πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList.length πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.AudioTrackList.removetrack_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.HTMLFormControlsCollection.namedItem πŸ“‹Chrome12/11/2008 Firefox10/14/20142133
Firefox: Returned a NodeList instead of a RadioNodeList.Firefox for Android: Returned a NodeList instead of a RadioNodeList.
api.HTMLMediaElement.audioTracks πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.HTMLMediaElement.videoTracks πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.RadioNodeList πŸ“‹Chrome7/31/2012 Firefox10/14/2014805
api.RadioNodeList.value πŸ“‹Chrome7/31/2012 Firefox10/14/2014805
api.VideoTrack πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrack.id πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrack.kind πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrack.label πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrack.language πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrack.selected πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.addtrack_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.change_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.getTrackById πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.length πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.removetrack_event πŸ“‹Chrome8/26/2014 Firefox10/14/201449
api.VideoTrackList.selectedIndex πŸ“‹Chrome8/26/2014 Firefox10/14/201449
css.properties.list-style-type.arabic-indic πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.bengali πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.cambodian πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.cjk-earthly-branch πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.cjk-heavenly-stem πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.devanagari πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.gujarati πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.gurmukhi πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.kannada πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.khmer πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.lao πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.lower-armenian πŸ“‹Chrome8/2/2011 Firefox10/14/20141169
css.properties.list-style-type.malayalam πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.mongolian πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.myanmar πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.oriya πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.persian πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.telugu πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.thai πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.tibetan πŸ“‹Chrome9/2/2010 Firefox10/14/20141503
css.properties.list-style-type.upper-armenian πŸ“‹Chrome8/2/2011 Firefox10/14/20141169
css.properties.list-style-type.urdu Chrome9/2/2010 Firefox10/14/20141503
css.types.color.named-color.rebeccapurple Chrome10/7/2014 Firefox10/14/20147
html.elements.a.rel.noreferrer πŸ“‹Chrome12/13/2011 Firefox10/14/20141036
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)
html.elements.area.rel.noreferrer πŸ“‹Chrome12/13/2011 Firefox10/14/20141036
Internet Explorer: Only supported in IE11 in later versions of Windows 10 (creators update). (Per caniuse.com.)
api.File.File πŸ“‹Firefox3/18/2014 Chrome10/7/2014203
api.HTMLIFrameElement.allowFullscreen πŸ“‹Firefox6/25/2013 Chrome10/7/2014469
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.SVGStyleElement.sheet πŸ“‹Firefox11/29/2005 Chrome10/7/20143234
api.TextDecoder πŸ“‹Firefox2/19/2013 Chrome10/7/2014595
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 Chrome10/7/2014595
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 Chrome10/7/2014595
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 Chrome10/7/2014595
Firefox: Implemented a slightly different version of the spec.Firefox for Android: Implemented a slightly different version of the spec.
api.TextDecoder.worker_support Firefox4/2/2013 Chrome10/7/2014553
api.TextEncoder πŸ“‹Firefox1/8/2013 Chrome10/7/2014637
Node.js: Available as a part of the util module.
api.TextEncoder.TextEncoder πŸ“‹Firefox1/8/2013 Chrome10/7/2014637
api.TextEncoder.encode πŸ“‹Firefox1/8/2013 Chrome10/7/2014637
api.TextEncoder.encoding πŸ“‹Firefox1/8/2013 Chrome10/7/2014637
api.TextEncoder.worker_support Firefox4/2/2013 Chrome10/7/2014553
api.WorkerLocation.origin πŸ“‹Firefox4/29/2014 Chrome10/7/2014161
html.elements.iframe.allowfullscreen πŸ“‹Firefox1/8/2013 Chrome10/7/2014637
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.
javascript.builtins.Array.entries πŸ“‹Firefox3/18/2014 Chrome10/7/2014203
javascript.builtins.Array.keys πŸ“‹Firefox3/18/2014 Chrome10/7/2014203
javascript.builtins.Iterator πŸ“‹Firefox11/20/2012 Chrome10/7/2014686
javascript.builtins.Map πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.Map πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.Map.iterable_allowed Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.clear πŸ“‹Firefox2/19/2013 Chrome10/7/2014595
javascript.builtins.Map.delete πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.entries πŸ“‹Firefox4/2/2013 Chrome10/7/2014553
javascript.builtins.Map.forEach πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Map.get πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.has πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Map.key_equality_for_zeros Firefox4/29/2014 Chrome10/7/2014161
javascript.builtins.Map.keys πŸ“‹Firefox4/2/2013 Chrome10/7/2014553
javascript.builtins.Map.set πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
Internet Explorer: Returns 'undefined' instead of the 'Map' object.
javascript.builtins.Map.size πŸ“‹Firefox2/19/2013 Chrome10/7/2014595
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 Chrome10/7/2014553
javascript.builtins.Math.acosh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.asinh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.atanh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.cbrt πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.clz32 πŸ“‹Firefox7/22/2014 Chrome10/7/201477
javascript.builtins.Math.cosh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.expm1 πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.fround πŸ“‹Firefox12/10/2013 Chrome10/7/2014301
javascript.builtins.Math.hypot πŸ“‹Firefox2/4/2014 Chrome10/7/2014245
javascript.builtins.Math.log10 πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.log1p πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.log2 πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.sign πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.sinh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.tanh πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Math.trunc πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Set πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Set.Set πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Set.Set.iterable_allowed Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Set.add πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
Internet Explorer: Returns 'undefined' instead of the 'Set' object.
javascript.builtins.Set.clear πŸ“‹Firefox2/19/2013 Chrome10/7/2014595
javascript.builtins.Set.delete πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Set.entries πŸ“‹Firefox9/17/2013 Chrome10/7/2014385
javascript.builtins.Set.forEach πŸ“‹Firefox10/29/2013 Chrome10/7/2014343
javascript.builtins.Set.has πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
javascript.builtins.Set.key_equality_for_zeros Firefox4/29/2014 Chrome10/7/2014161
javascript.builtins.Set.keys πŸ“‹Firefox9/17/2013 Chrome10/7/2014385
javascript.builtins.Set.size πŸ“‹Firefox2/19/2013 Chrome10/7/2014595
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 Chrome10/7/2014385
javascript.statements.for_of πŸ“‹Firefox6/5/2012 Chrome10/7/2014854
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").

2014/9

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.drawFocusIfNeeded πŸ“‹Chrome8/26/2014 Firefox9/2/20147
api.HTMLAllCollection πŸ“‹Chrome5/25/2010 Firefox9/2/20141561
api.HTMLAllCollection.item πŸ“‹Chrome5/25/2010 Firefox9/2/20141561
api.HTMLAllCollection.length πŸ“‹Chrome9/2/2010 Firefox9/2/20141461
api.HTMLAllCollection.namedItem πŸ“‹Chrome5/25/2010 Firefox9/2/20141561
api.Navigator.languages πŸ“‹Chrome8/26/2014 Firefox9/2/20147
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.Window.languagechange_event πŸ“‹Chrome8/26/2014 Firefox9/2/20147
api.WorkerNavigator.languages πŸ“‹Chrome8/26/2014 Firefox9/2/20147
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.XMLHttpRequest.responseURL πŸ“‹Chrome8/26/2014 Firefox9/2/20147
css.properties.font-kerning πŸ“‹Chrome2/20/2014 Firefox9/2/2014194
css.properties.font-kerning.auto πŸ“‹Chrome2/20/2014 Firefox9/2/2014194
css.properties.font-kerning.none πŸ“‹Chrome2/20/2014 Firefox9/2/2014194
css.properties.font-kerning.normal πŸ“‹Chrome2/20/2014 Firefox9/2/2014194
css.selectors.scope πŸ“‹Chrome5/21/2013 Firefox9/2/2014469
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 Chrome5/21/2013 Firefox9/2/2014469
html.global_attributes.id πŸ“‹Chrome12/11/2008 Firefox9/2/20142091
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.
javascript.builtins.Number.isSafeInteger πŸ“‹Chrome4/8/2014 Firefox9/2/2014147

2014/8

API First Browser Date Last Browser Date Days Notes
api.crypto πŸ“‹Firefox11/9/2004 Chrome8/26/20143577
Node.js: Available as a part of the crypto module.
css.properties.all πŸ“‹Firefox2/4/2014 Chrome8/26/2014203
css.properties.cursor.zoom-in πŸ“‹Firefox9/17/2013 Chrome8/26/2014343
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 Chrome8/26/2014343
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.transition.allow-discrete πŸ“‹Firefox3/22/2011 Chrome8/26/20141253
css.properties.transition.normal πŸ“‹Firefox3/22/2011 Chrome8/26/20141253

2014/7

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.clip.path_parameter Chrome7/16/2014 Firefox7/22/20146
api.CanvasRenderingContext2D.fill.path_parameter Chrome7/16/2014 Firefox7/22/20146
api.CanvasRenderingContext2D.isPointInPath.path_parameter Chrome7/16/2014 Firefox7/22/20146
api.CanvasRenderingContext2D.isPointInStroke.path_parameter Chrome7/16/2014 Firefox7/22/20146
api.CanvasRenderingContext2D.stroke.path_parameter Chrome7/16/2014 Firefox7/22/20146
api.ErrorEvent.colno πŸ“‹Chrome10/1/2013 Firefox7/22/2014294
api.ErrorEvent.error πŸ“‹Chrome10/1/2013 Firefox7/22/2014294
api.HTMLLinkElement.sizes πŸ“‹Chrome10/25/2011 Firefox7/22/20141001
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“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLMediaElement.textTracks πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement.kind πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement.label πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement.readyState πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement.src πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
api.HTMLTrackElement.track πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.KeyboardEvent.KeyboardEvent πŸ“‹Chrome3/26/2013 Firefox7/22/2014483
api.Path2D πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.Path2D πŸ“‹Chrome7/16/2014 Firefox7/22/20146
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“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.arcTo πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.bezierCurveTo πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.closePath πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.lineTo πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.moveTo πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.quadraticCurveTo πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.Path2D.rect πŸ“‹Chrome7/16/2014 Firefox7/22/20146
api.TextTrack πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrack.cuechange_event πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrack.cues πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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.id πŸ“‹Chrome2/20/2014 Firefox7/22/2014152
api.TextTrack.kind πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrack.label πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrack.language πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrack.mode πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.endTime πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.enter_event πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.exit_event πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.id πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.pauseOnExit πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.startTime πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCue.track πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCueList πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCueList.getCueById πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackCueList.length πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackList πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackList.addtrack_event πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackList.change_event πŸ“‹Chrome2/20/2014 Firefox7/22/2014152
api.TextTrackList.getTrackById πŸ“‹Chrome2/20/2014 Firefox7/22/2014152
api.TextTrackList.length πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.TextTrackList.removetrack_event πŸ“‹Chrome2/20/2014 Firefox7/22/2014152
api.VTTCue πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.VTTCue πŸ“‹Chrome2/20/2014 Firefox7/22/2014152
api.VTTCue.align πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.getCueAsHTML πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.line πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.position πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.size πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.snapToLines πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.text πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
api.VTTCue.vertical πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
css.properties.font-size.rem_values Chrome11/12/2013 Firefox7/22/2014252
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“‹Chrome10/25/2011 Firefox7/22/20141001
html.elements.track πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
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“‹Chrome11/6/2012 Firefox7/22/2014623
html.elements.track.kind πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
html.elements.track.label πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
html.elements.track.srclang πŸ“‹Chrome11/6/2012 Firefox7/22/2014623
javascript.builtins.Number.MAX_SAFE_INTEGER πŸ“‹Chrome4/8/2014 Firefox7/22/2014105
javascript.builtins.Number.MIN_SAFE_INTEGER πŸ“‹Chrome4/8/2014 Firefox7/22/2014105
javascript.builtins.Object.setPrototypeOf πŸ“‹Chrome4/8/2014 Firefox7/22/2014105
javascript.builtins.String.normalize πŸ“‹Chrome4/8/2014 Firefox7/22/2014105
api.Document.contentType πŸ“‹Firefox11/9/2004 Chrome7/16/20143536
api.Document.dir πŸ“‹Firefox11/9/2004 Chrome7/16/20143536
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.DocumentFragment.getElementById πŸ“‹Firefox3/18/2014 Chrome7/16/2014120
api.ImageData.ImageData πŸ“‹Firefox4/29/2014 Chrome7/16/201478
api.ImageData.worker_support Firefox10/29/2013 Chrome7/16/2014260
api.WEBGL_draw_buffers πŸ“‹Firefox3/18/2014 Chrome7/16/2014120
api.WEBGL_draw_buffers.drawBuffersWEBGL πŸ“‹Firefox3/18/2014 Chrome7/16/2014120
css.properties.align-self.flex_context πŸ“‹Firefox4/2/2013 Chrome7/16/2014470
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.backface-visibility πŸ“‹Firefox10/9/2012 Chrome7/16/2014645
css.properties.perspective πŸ“‹Firefox10/9/2012 Chrome7/16/2014645
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 Chrome7/16/2014645
css.properties.transform πŸ“‹Firefox10/9/2012 Chrome7/16/2014645
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 Chrome7/16/2014645
css.properties.transform-style πŸ“‹Firefox10/9/2012 Chrome7/16/2014645
Safari: Before Safari 17, ::before and ::after pseudo elements were not included in the 3D rendering context (see bug 256430).
http.status.308 πŸ“‹Firefox7/17/2012 Chrome7/16/2014729
Internet Explorer: Does not work below Windows 10.
javascript.builtins.WeakMap πŸ“‹Firefox8/16/2011 Chrome7/16/20141065
javascript.builtins.WeakMap.WeakMap πŸ“‹Firefox8/16/2011 Chrome7/16/20141065
javascript.builtins.WeakMap.delete πŸ“‹Firefox8/16/2011 Chrome7/16/20141065
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 Chrome7/16/20141065
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 Chrome7/16/20141065
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 Chrome7/16/20141065
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.

2014/6

API First Browser Date Last Browser Date Days Notes
api.AnalyserNode.getFloatTimeDomainData πŸ“‹Chrome5/20/2014 Firefox6/10/201421
api.HTMLCanvasElement.getContext.2d_context.options_alpha_parameter πŸ“‹Chrome1/14/2014 Firefox6/10/2014147
api.HTMLCanvasElement.getContext.webgl_context.options_alpha_parameter πŸ“‹Chrome1/14/2014 Firefox6/10/2014147
api.OES_texture_half_float_linear πŸ“‹Chrome8/20/2013 Firefox6/10/2014294
api.SVGFEDropShadowElement πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.dx πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.dy πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.height πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.in1 πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.result πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.setStdDeviation πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.stdDeviationX πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.stdDeviationY πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.width πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.x πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.SVGFEDropShadowElement.y πŸ“‹Chrome8/2/2011 Firefox6/10/20141043
api.console.count_static πŸ“‹Chrome5/21/2009 Firefox6/10/20141846
css.properties.background-blend-mode πŸ“‹Chrome5/20/2014 Firefox6/10/201421
css.types.blend-mode πŸ“‹Chrome5/20/2014 Firefox6/10/201421
html.elements.area.rel πŸ“‹Chrome12/13/2011 Firefox6/10/2014910
javascript.builtins.TypedArray.named_properties Chrome10/19/2010 Firefox6/10/20141330

2014/5

API First Browser Date Last Browser Date Days Notes
api.AudioContext πŸ“‹Firefox10/29/2013 Chrome5/20/2014203
api.AudioContext.AudioContext πŸ“‹Firefox10/29/2013 Chrome5/20/2014203
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.GamepadEvent.GamepadEvent πŸ“‹Firefox4/29/2014 Chrome5/20/201421
api.HTMLSelectElement.add.index_before_parameter Firefox11/8/2011 Chrome5/20/2014924
api.Navigator.getGamepads πŸ“‹Firefox4/29/2014 Chrome5/20/201421
api.OfflineAudioContext πŸ“‹Firefox10/29/2013 Chrome5/20/2014203
api.OfflineAudioContext.OfflineAudioContext πŸ“‹Firefox10/29/2013 Chrome5/20/2014203
api.SVGLengthList.length πŸ“‹Firefox6/21/2011 Chrome5/20/20141064
api.SVGNumberList.length πŸ“‹Firefox6/21/2011 Chrome5/20/20141064
api.SVGPointList.length πŸ“‹Firefox6/21/2011 Chrome5/20/20141064
api.SVGStringList.length πŸ“‹Firefox4/24/2012 Chrome5/20/2014756
api.SVGTransformList.length πŸ“‹Firefox12/20/2011 Chrome5/20/2014882

2014/4

API First Browser Date Last Browser Date Days Notes
api.Gamepad πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.axes πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.buttons πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.connected πŸ“‹Chrome2/21/2013 Firefox4/29/2014432
api.Gamepad.id πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.index πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.mapping πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.Gamepad.timestamp πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.GamepadButton πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.GamepadButton.pressed πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.GamepadButton.value πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.GamepadEvent πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.GamepadEvent.gamepad πŸ“‹Chrome7/31/2012 Firefox4/29/2014637
api.OES_texture_half_float πŸ“‹Chrome5/21/2013 Firefox4/29/2014343
api.SVGFEComponentTransferElement.height πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEComponentTransferElement.result πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEComponentTransferElement.width πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEComponentTransferElement.x πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEComponentTransferElement.y πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEGaussianBlurElement.height πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEGaussianBlurElement.result πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEGaussianBlurElement.width πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEGaussianBlurElement.x πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SVGFEGaussianBlurElement.y πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SharedWorker πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SharedWorker.SharedWorker πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SharedWorker.error_event πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SharedWorker.port πŸ“‹Chrome5/25/2010 Firefox4/29/20141435
api.SharedWorkerGlobalScope πŸ“‹Chrome1/25/2010 Firefox4/29/20141555
api.SharedWorkerGlobalScope.close πŸ“‹Chrome1/25/2010 Firefox4/29/20141555
api.SharedWorkerGlobalScope.connect_event πŸ“‹Chrome1/25/2010 Firefox4/29/20141555
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“‹Chrome1/25/2010 Firefox4/29/20141555
api.ValidityState.badInput πŸ“‹Chrome2/21/2013 Firefox4/29/2014432
api.console.worker_support Chrome11/12/2013 Firefox4/29/2014168
css.properties.border-image.gradient Chrome10/19/2010 Firefox4/29/20141288
css.properties.box-sizing πŸ“‹Chrome3/8/2011 Firefox4/29/20141148
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“‹Chrome3/8/2011 Firefox4/29/20141148
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“‹Chrome3/8/2011 Firefox4/29/20141148
html.elements.input.type_color πŸ“‹Chrome6/26/2012 Firefox4/29/2014672
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_number πŸ“‹Chrome10/19/2010 Firefox4/29/20141288
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.
html.elements.input.type_number.list πŸ“‹Chrome9/25/2012 Firefox4/29/2014581
javascript.builtins.ArrayBuffer.isView πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Date.toLocaleDateString.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Date.toLocaleString.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Date.toLocaleTimeString.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl πŸ“‹Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator πŸ“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator.Collator.options_localeMatcher_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator.Collator.options_numeric_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator.Collator.options_sensitivity_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator.Collator.options_usage_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.Collator.compare πŸ“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZoneName_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.DateTimeFormat.DateTimeFormat.options_parameter.options_timeZone_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.DateTimeFormat.format πŸ“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_currency_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_localeMatcher_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumFractionDigits_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_maximumSignificantDigits_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumFractionDigits_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumIntegerDigits_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_minimumSignificantDigits_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_style_parameter Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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“‹Chrome1/10/2013 Firefox4/29/2014474
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.Number.toLocaleString.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
javascript.builtins.Promise πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.Promise πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
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“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.catch πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.race πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.reject πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.resolve πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.Promise.then πŸ“‹Chrome1/14/2014 Firefox4/29/2014105
javascript.builtins.String.localeCompare.locales_parameter Chrome1/10/2013 Firefox4/29/2014474
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 Chrome1/10/2013 Firefox4/29/2014474
api.Document.hasFocus πŸ“‹Firefox6/17/2008 Chrome4/8/20142121
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.HTMLLinkElement.crossOrigin πŸ“‹Firefox1/8/2013 Chrome4/8/2014455
api.XMLDocument πŸ“‹Firefox11/9/2004 Chrome4/8/20143437
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.
css.properties.text-transform.greek_accented_characters Firefox8/28/2012 Chrome4/8/2014588
html.elements.link.crossorigin πŸ“‹Firefox1/8/2013 Chrome4/8/2014455
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".
javascript.builtins.Number.EPSILON πŸ“‹Firefox10/29/2013 Chrome4/8/2014161
javascript.builtins.Number.isInteger πŸ“‹Firefox10/9/2012 Chrome4/8/2014546
javascript.builtins.Number.parseFloat πŸ“‹Firefox10/29/2013 Chrome4/8/2014161
javascript.builtins.Number.parseInt πŸ“‹Firefox10/29/2013 Chrome4/8/2014161

2014/3

API First Browser Date Last Browser Date Days Notes
api.console.assert_static πŸ“‹Chrome5/21/2009 Firefox3/18/20141762
Node.js: Throws error when assertion fails.
css.properties.align-content πŸ“‹Chrome8/20/2013 Firefox3/18/2014210
css.properties.align-content.flex_context πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.align-content.normal πŸ“‹Chrome8/20/2013 Firefox3/18/2014210
css.properties.align-items.flex_context.baseline Chrome7/31/2012 Firefox3/18/2014595
css.properties.align-self.auto πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.align-self.flex_context.baseline πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.align-self.normal πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.align-self.stretch πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow πŸ“‹Chrome8/20/2013 Firefox3/18/2014210
css.properties.flex-flow.column πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.column-reverse πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.nowrap πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.row πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.row-reverse πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.wrap πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-flow.wrap-reverse πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-wrap πŸ“‹Chrome8/20/2013 Firefox3/18/2014210
Internet Explorer: Partial support due to large number of bugs present. See Flexbugs.
css.properties.flex-wrap.nowrap πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-wrap.wrap πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
css.properties.flex-wrap.wrap-reverse πŸ“‹Chrome7/31/2012 Firefox3/18/2014595
html.elements.iframe.sandbox.allow-popups πŸ“‹Chrome2/8/2012 Firefox3/18/2014769

2014/2

API First Browser Date Last Browser Date Days Notes
api.Document.hidden πŸ“‹Firefox1/8/2013 Chrome2/20/2014408
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 Chrome2/20/2014408
api.HTMLCanvasElement.getContext.webgl_context Firefox9/17/2013 Chrome2/20/2014156
api.HTMLHRElement.color πŸ“‹Firefox11/9/2004 Chrome2/20/20143390
api.HTMLMediaElement.crossOrigin πŸ“‹Firefox6/25/2013 Chrome2/20/2014240
api.Notification.body πŸ“‹Firefox12/10/2013 Chrome2/20/201472
api.Notification.icon πŸ“‹Firefox12/10/2013 Chrome2/20/201472
Safari: The property can be set, but has no effect.Safari on iOS: The property can be set, but has no effect.
api.Notification.lang πŸ“‹Firefox12/10/2013 Chrome2/20/201472
api.Notification.title πŸ“‹Firefox12/10/2013 Chrome2/20/201472
html.elements.hr.color Firefox11/9/2004 Chrome2/20/20143390
api.CanvasRenderingContext2D.getLineDash πŸ“‹Chrome11/6/2012 Firefox2/4/2014455
api.CanvasRenderingContext2D.lineDashOffset πŸ“‹Chrome11/6/2012 Firefox2/4/2014455
api.CanvasRenderingContext2D.setLineDash πŸ“‹Chrome11/6/2012 Firefox2/4/2014455
api.ErrorEvent πŸ“‹Chrome3/8/2011 Firefox2/4/20141064
api.ErrorEvent.ErrorEvent πŸ“‹Chrome12/13/2011 Firefox2/4/2014784
api.ErrorEvent.filename πŸ“‹Chrome3/8/2011 Firefox2/4/20141064
api.ErrorEvent.lineno πŸ“‹Chrome3/8/2011 Firefox2/4/20141064
api.ErrorEvent.message πŸ“‹Chrome3/8/2011 Firefox2/4/20141064
api.HTMLInputElement.setRangeText πŸ“‹Chrome1/10/2013 Firefox2/4/2014390
api.HTMLTextAreaElement.setRangeText πŸ“‹Chrome1/10/2013 Firefox2/4/2014390
api.RTCPeerConnection.getStats πŸ“‹Chrome1/10/2013 Firefox2/4/2014390
api.TrackEvent πŸ“‹Chrome11/6/2012 Firefox2/4/2014455
api.TrackEvent.TrackEvent πŸ“‹Chrome11/6/2012 Firefox2/4/2014455
api.TrackEvent.track πŸ“‹Chrome11/6/2012 Firefox2/4/2014455

2014/1

API First Browser Date Last Browser Date Days Notes
api.HTMLAnchorElement.password πŸ“‹Firefox12/10/2013 Chrome1/14/201435
api.HTMLAnchorElement.username πŸ“‹Firefox12/10/2013 Chrome1/14/201435
api.HTMLAreaElement.origin πŸ“‹Firefox12/10/2013 Chrome1/14/201435
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 Chrome1/14/201435
api.HTMLAreaElement.toString πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
api.HTMLAreaElement.username πŸ“‹Firefox12/10/2013 Chrome1/14/201435
api.Notification.permission_static πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
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.URL πŸ“‹Firefox2/19/2013 Chrome1/14/2014329
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 Chrome1/14/2014203
api.URL.host πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
api.URL.hostname πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
api.URL.href πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
api.URL.origin πŸ“‹Firefox12/10/2013 Chrome1/14/201435
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 Chrome1/14/201435
api.URL.pathname πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
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 Chrome1/14/2014203
api.URL.protocol πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
api.URL.search πŸ“‹Firefox6/25/2013 Chrome1/14/2014203
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 Chrome1/14/201435

2013/12

API First Browser Date Last Browser Date Days Notes
api.DOMTokenList.add.multiple_parameters Chrome1/10/2013 Firefox12/10/2013334
api.DOMTokenList.remove.multiple_parameters Chrome1/10/2013 Firefox12/10/2013334
api.HTMLAnchorElement.origin πŸ“‹Chrome12/2/2010 Firefox12/10/20131104
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“‹Chrome5/15/2012 Firefox12/10/2013574
api.MessageEvent.MessageEvent πŸ“‹Chrome12/13/2011 Firefox12/10/2013728
api.Notification.dir πŸ“‹Chrome6/26/2012 Firefox12/10/2013532
api.Notification.tag πŸ“‹Chrome6/26/2012 Firefox12/10/2013532
Safari: The property can be set, but has no effect.
api.URL.URL πŸ“‹Chrome5/15/2012 Firefox12/10/2013574
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.WaveShaperNode.oversample πŸ“‹Chrome8/20/2013 Firefox12/10/2013112

2013/11

API First Browser Date Last Browser Date Days Notes
api.DOMParser.parseFromString.html Firefox4/24/2012 Chrome11/12/2013567
api.DeviceMotionEvent πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEvent.acceleration πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEvent.accelerationIncludingGravity πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEvent.interval πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEvent.rotationRate πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventAcceleration πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
Firefox: The DeviceMotionEventAcceleration interface is supported, but not exposed on the Window scope.Firefox for Android: The DeviceMotionEventAcceleration interface is supported, but not exposed on the Window scope.Safari on iOS: The DeviceMotionEventAcceleration interface is supported, but not exposed on the Window scope.
api.DeviceMotionEventAcceleration.x πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventAcceleration.y πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventAcceleration.z πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventRotationRate πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventRotationRate.alpha πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventRotationRate.beta πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.DeviceMotionEventRotationRate.gamma πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.Element.wheel_event πŸ“‹Firefox11/20/2012 Chrome11/12/2013357
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.Navigator.registerProtocolHandler.scheme_parameter_wtai Firefox10/24/2006 Chrome11/12/20132576
api.WheelEvent.deltaX πŸ“‹Firefox11/20/2012 Chrome11/12/2013357
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 Chrome11/12/2013357
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 Chrome11/12/2013357
Internet Explorer: IE9 supports an old draft of the spec where this value was a long instead of a double.
api.Window.devicemotion_event πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.XMLHttpRequest.responseType πŸ“‹Firefox8/16/2011 Chrome11/12/2013819
api.XMLHttpRequest.responseType.arraybuffer_value Firefox8/16/2011 Chrome11/12/2013819
api.XMLHttpRequest.responseType.blob_value Firefox8/16/2011 Chrome11/12/2013819
api.XMLHttpRequest.responseType.document_value Firefox3/13/2012 Chrome11/12/2013609
api.XMLHttpRequest.responseType.json_value Firefox1/31/2012 Chrome11/12/2013651
css.properties.color-interpolation.linearRGB πŸ“‹Firefox6/17/2008 Chrome11/12/20131974
css.properties.font-variant.turkic_is Firefox7/17/2012 Chrome11/12/2013483
css.properties.outline.currentColor πŸ“‹Firefox11/9/2004 Chrome11/12/20133290
css.properties.text-decoration.blink πŸ“‹Firefox6/17/2008 Chrome11/12/20131974
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-transform.turkic_is Firefox7/17/2012 Chrome11/12/2013483

2013/10

API First Browser Date Last Browser Date Days Notes
api.AnalyserNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.fftSize πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.frequencyBinCount πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.getByteFrequencyData πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.getByteTimeDomainData πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.getFloatFrequencyData πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.maxDecibels πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.minDecibels πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AnalyserNode.smoothingTimeConstant πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer.duration πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer.getChannelData πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer.length πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer.numberOfChannels πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBuffer.sampleRate πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBufferSourceNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBufferSourceNode.buffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
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“‹Chrome10/25/2011 Firefox10/29/2013735
api.AudioBufferSourceNode.loopEnd πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.AudioBufferSourceNode.loopStart πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.AudioBufferSourceNode.playbackRate πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioBufferSourceNode.start πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.AudioContext.createMediaElementSource πŸ“‹Chrome10/25/2011 Firefox10/29/2013735
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.AudioContext.createMediaStreamDestination πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.AudioContext.createMediaStreamSource πŸ“‹Chrome9/25/2012 Firefox10/29/2013399
api.AudioDestinationNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioDestinationNode.maxChannelCount πŸ“‹Chrome5/21/2013 Firefox10/29/2013161
Safari: This property always returns 0.Safari on iOS: This property always returns 0.WebView on iOS: This property always returns 0.
api.AudioListener πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioListener.setOrientation πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioListener.setPosition πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode.channelCount πŸ“‹Chrome5/21/2013 Firefox10/29/2013161
api.AudioNode.channelCountMode πŸ“‹Chrome5/21/2013 Firefox10/29/2013161
api.AudioNode.channelInterpretation πŸ“‹Chrome5/21/2013 Firefox10/29/2013161
api.AudioNode.connect πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode.context πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode.disconnect πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode.numberOfInputs πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioNode.numberOfOutputs πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam.cancelScheduledValues πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam.defaultValue πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam.exponentialRampToValueAtTime πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
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“‹Chrome9/16/2011 Firefox10/29/2013774
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“‹Chrome1/10/2013 Firefox10/29/2013292
api.AudioParam.setValueAtTime πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam.setValueCurveAtTime πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioParam.value πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
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 Chrome9/16/2011 Firefox10/29/2013774
api.AudioProcessingEvent.inputBuffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioProcessingEvent.outputBuffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioProcessingEvent.playbackTime πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.AudioScheduledSourceNode.ended_event πŸ“‹Chrome10/1/2013 Firefox10/29/201328
api.AudioScheduledSourceNode.start πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.AudioScheduledSourceNode.stop πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.BaseAudioContext.createAnalyser πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createBiquadFilter πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createBuffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createBufferSource πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createChannelMerger πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createChannelSplitter πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createConvolver πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createDelay πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.BaseAudioContext.createDynamicsCompressor πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createGain πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.BaseAudioContext.createOscillator πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.BaseAudioContext.createPanner πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.createPeriodicWave πŸ“‹Chrome10/1/2013 Firefox10/29/201328
api.BaseAudioContext.createScriptProcessor πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.BaseAudioContext.createWaveShaper πŸ“‹Chrome10/25/2011 Firefox10/29/2013735
api.BaseAudioContext.currentTime πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.decodeAudioData πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.destination πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.listener πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BaseAudioContext.sampleRate πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BiquadFilterNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BiquadFilterNode.Q πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BiquadFilterNode.detune πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.BiquadFilterNode.frequency πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BiquadFilterNode.gain πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.BiquadFilterNode.getFrequencyResponse πŸ“‹Chrome2/8/2012 Firefox10/29/2013629
api.BiquadFilterNode.type πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.ChannelMergerNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.ChannelSplitterNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
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.CharacterData.nextElementSibling πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.CharacterData.previousElementSibling πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.ConvolverNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.ConvolverNode.buffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.ConvolverNode.normalize πŸ“‹Chrome3/28/2012 Firefox10/29/2013580
api.DelayNode πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.DelayNode.delayTime πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.Document.childElementCount πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.Document.children πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.Document.firstElementChild πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.Document.lastElementChild πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.DocumentFragment.childElementCount πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.DocumentFragment.children πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.DocumentFragment.firstElementChild πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.DocumentFragment.lastElementChild πŸ“‹Chrome8/20/2013 Firefox10/29/201370
api.DynamicsCompressorNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.DynamicsCompressorNode.attack πŸ“‹Chrome5/15/2012 Firefox10/29/2013532
api.DynamicsCompressorNode.knee πŸ“‹Chrome5/15/2012 Firefox10/29/2013532
api.DynamicsCompressorNode.ratio πŸ“‹Chrome5/15/2012 Firefox10/29/2013532
api.DynamicsCompressorNode.reduction πŸ“‹Chrome5/15/2012 Firefox10/29/2013532
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“‹Chrome6/26/2012 Firefox10/29/2013490
api.DynamicsCompressorNode.threshold πŸ“‹Chrome5/15/2012 Firefox10/29/2013532
api.GainNode πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.GainNode.gain πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.HTMLIFrameElement.srcdoc πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.HTMLTableElement.createTBody πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.MediaElementAudioSourceNode πŸ“‹Chrome10/25/2011 Firefox10/29/2013735
api.MediaStreamAudioDestinationNode πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.MediaStreamAudioDestinationNode.stream πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.MediaStreamAudioSourceNode πŸ“‹Chrome9/25/2012 Firefox10/29/2013399
api.OES_vertex_array_object πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.OES_vertex_array_object.bindVertexArrayOES πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.OES_vertex_array_object.createVertexArrayOES πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.OES_vertex_array_object.deleteVertexArrayOES πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.OES_vertex_array_object.isVertexArrayOES πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.OfflineAudioCompletionEvent πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.OfflineAudioCompletionEvent.renderedBuffer πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.OfflineAudioContext.complete_event πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.OfflineAudioContext.startRendering πŸ“‹Chrome2/21/2013 Firefox10/29/2013250
api.OscillatorNode πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.OscillatorNode.detune πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.OscillatorNode.frequency πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.OscillatorNode.setPeriodicWave πŸ“‹Chrome10/1/2013 Firefox10/29/201328
api.OscillatorNode.type πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
api.PannerNode πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.coneInnerAngle πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.coneOuterAngle πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.coneOuterGain πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.distanceModel πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.maxDistance πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.panningModel πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.refDistance πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.rolloffFactor πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.setOrientation πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PannerNode.setPosition πŸ“‹Chrome9/16/2011 Firefox10/29/2013774
api.PeriodicWave πŸ“‹Chrome10/1/2013 Firefox10/29/201328
api.Range.collapse.toStart_parameter_optional Chrome12/11/2008 Firefox10/29/20131783
Internet Explorer: Optional but defaults to true.
api.SVGSVGElement.deselectAll πŸ“‹Chrome12/11/2008 Firefox10/29/20131783
api.ScriptProcessorNode Chrome1/10/2013 Firefox10/29/2013292
api.ScriptProcessorNode.audioprocess_event Chrome1/10/2013 Firefox10/29/2013292
api.ScriptProcessorNode.bufferSize πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
api.WaveShaperNode πŸ“‹Chrome10/25/2011 Firefox10/29/2013735
api.WaveShaperNode.curve πŸ“‹Chrome10/25/2011 Firefox10/29/2013735
api.WebGLVertexArrayObjectOES πŸ“‹Chrome1/10/2013 Firefox10/29/2013292
css.properties.background-attachment.local πŸ“‹Chrome12/11/2008 Firefox10/29/20131783
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.font-smooth Chrome5/25/2010 Firefox10/29/20131253
Firefox: Only works on macOS.
html.elements.iframe.srcdoc πŸ“‹Chrome6/26/2012 Firefox10/29/2013490
javascript.builtins.TypedArray.index_properties_not_consulting_prototype Chrome10/19/2010 Firefox10/29/20131106
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 Chrome10/1/20132863
api.Element.mouseenter_event πŸ“‹Firefox1/31/2012 Chrome10/1/2013609
api.Element.mouseleave_event πŸ“‹Firefox1/31/2012 Chrome10/1/2013609
api.KeyboardEvent.getModifierState πŸ“‹Firefox8/28/2012 Chrome10/1/2013399
api.KeyboardEvent.getModifierState.key_parameter_alt Firefox8/28/2012 Chrome10/1/2013399
api.KeyboardEvent.getModifierState.key_parameter_control Firefox8/28/2012 Chrome10/1/2013399
api.KeyboardEvent.getModifierState.key_parameter_meta Firefox8/28/2012 Chrome10/1/2013399
api.KeyboardEvent.getModifierState.key_parameter_shift Firefox8/28/2012 Chrome10/1/2013399
api.KeyboardEvent.location πŸ“‹Firefox8/28/2012 Chrome10/1/2013399
api.Navigator.registerProtocolHandler.scheme_parameter_geo Firefox10/24/2006 Chrome10/1/20132534
api.Navigator.registerProtocolHandler.scheme_parameter_im Firefox10/24/2006 Chrome10/1/20132534
api.Navigator.registerProtocolHandler.scheme_parameter_ircs Firefox10/24/2006 Chrome10/1/20132534
api.Navigator.registerProtocolHandler.scheme_parameter_magnet Firefox10/24/2006 Chrome10/1/20132534
api.Navigator.registerProtocolHandler.scheme_parameter_sip Firefox10/24/2006 Chrome10/1/20132534
api.Navigator.registerProtocolHandler.scheme_parameter_xmpp Firefox10/24/2006 Chrome10/1/20132534
api.RTCDataChannel.id πŸ“‹Firefox6/25/2013 Chrome10/1/201398
api.RTCDataChannel.ordered πŸ“‹Firefox6/25/2013 Chrome10/1/201398
api.RTCDataChannel.protocol πŸ“‹Firefox6/25/2013 Chrome10/1/201398
api.SVGGraphicsElement πŸ“‹Firefox4/2/2013 Chrome10/1/2013182
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.atob.worker_support Firefox3/22/2011 Chrome10/1/2013924
api.btoa.worker_support Firefox3/22/2011 Chrome10/1/2013924
css.properties.border-image-repeat.round πŸ“‹Firefox8/28/2012 Chrome10/1/2013399
css.properties.text-transform.lowercase_sigma Firefox7/17/2012 Chrome10/1/2013441
html.elements.video.muted πŸ“‹Firefox3/13/2012 Chrome10/1/2013567

2013/9

API First Browser Date Last Browser Date Days Notes
api.Comment.Comment πŸ“‹Chrome8/20/2013 Firefox9/17/201328
api.DOMTokenList.toggle.force_parameter Chrome1/10/2013 Firefox9/17/2013250
api.DocumentFragment.DocumentFragment πŸ“‹Chrome8/20/2013 Firefox9/17/201328
api.Element.blur_event πŸ“‹Chrome12/11/2008 Firefox9/17/20131741
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“‹Chrome12/11/2008 Firefox9/17/20131741
Firefox: The interface for this event is Event, not FocusEvent.Firefox for Android: The interface for this event is Event, not FocusEvent.
api.FocusEvent πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.FocusEvent.FocusEvent πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.FocusEvent.relatedTarget πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.MediaStreamEvent Chrome3/26/2013 Firefox9/17/2013175
api.MediaStreamEvent.MediaStreamEvent Chrome3/26/2013 Firefox9/17/2013175
api.MediaStreamEvent.stream Chrome3/26/2013 Firefox9/17/2013175
api.MediaStreamTrack.enabled πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.OES_element_index_uint πŸ“‹Chrome1/10/2013 Firefox9/17/2013250
api.OES_texture_float_linear πŸ“‹Chrome8/20/2013 Firefox9/17/201328
Safari on iOS: Only supported on iPadOS.WebView on iOS: Only supported on iPadOS.
api.RTCPeerConnection.getLocalStreams Chrome5/21/2013 Firefox9/17/2013119
api.RTCPeerConnection.getRemoteStreams Chrome5/21/2013 Firefox9/17/2013119
api.RTCPeerConnection.iceConnectionState πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.RTCPeerConnection.iceconnectionstatechange_event πŸ“‹Chrome7/9/2013 Firefox9/17/201370
api.RTCPeerConnection.signalingState πŸ“‹Chrome3/26/2013 Firefox9/17/2013175
api.RTCPeerConnectionIceEvent.candidate πŸ“‹Chrome1/10/2013 Firefox9/17/2013250
api.Range.Range πŸ“‹Chrome8/20/2013 Firefox9/17/201328
api.Text.Text πŸ“‹Chrome8/20/2013 Firefox9/17/201328

2013/8

API First Browser Date Last Browser Date Days Notes
api.Document.currentScript πŸ“‹Firefox3/22/2011 Chrome8/20/2013882
api.XMLHttpRequest.timeout πŸ“‹Firefox4/24/2012 Chrome8/20/2013483
api.XMLHttpRequest.timeout_event πŸ“‹Firefox4/24/2012 Chrome8/20/2013483
api.XMLHttpRequestUpload.timeout_event πŸ“‹Firefox4/24/2012 Chrome8/20/2013483
css.at-rules.media.resolution πŸ“‹Firefox11/8/2011 Chrome8/20/2013651
Firefox: Supports <integer> values only.Firefox for Android: Supports <integer> values only.
css.properties.align-items πŸ“‹Firefox4/2/2013 Chrome8/20/2013140
css.properties.align-self πŸ“‹Firefox4/2/2013 Chrome8/20/2013140
css.properties.display.flex Firefox4/2/2013 Chrome8/20/2013140
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 Chrome8/20/2013140
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 Chrome8/20/201356
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 Chrome8/20/201356
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-direction πŸ“‹Firefox6/25/2013 Chrome8/20/201356
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-grow πŸ“‹Firefox4/2/2013 Chrome8/20/2013140
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 Chrome8/20/2013140
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.justify-content πŸ“‹Firefox4/2/2013 Chrome8/20/2013140
css.properties.order πŸ“‹Firefox4/2/2013 Chrome8/20/2013140
Firefox: Since Firefox 28, multi-line flexbox is supported.Firefox for Android: Since Firefox for Android 28, multi-line flexbox is supported.
css.types.resolution πŸ“‹Firefox11/8/2011 Chrome8/20/2013651
Firefox: Supports <integer> values only.Firefox for Android: Supports <integer> values only.
css.types.resolution.dpcm Firefox11/8/2011 Chrome8/20/2013651
css.types.resolution.dpi Firefox11/8/2011 Chrome8/20/2013651
css.types.resolution.dppx Firefox10/9/2012 Chrome8/20/2013315
api.CharacterData.remove πŸ“‹Chrome1/10/2013 Firefox8/6/2013208
api.DocumentType.remove πŸ“‹Chrome1/10/2013 Firefox8/6/2013208
api.Element.remove πŸ“‹Chrome1/10/2013 Firefox8/6/2013208
api.TransitionEvent.TransitionEvent πŸ“‹Chrome5/21/2013 Firefox8/6/201377
api.TransitionEvent.pseudoElement πŸ“‹Chrome5/21/2009 Firefox8/6/20131538
api.Window.cancelAnimationFrame πŸ“‹Chrome1/10/2013 Firefox8/6/2013208
api.Window.requestAnimationFrame πŸ“‹Chrome1/10/2013 Firefox8/6/2013208
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.
html.elements.input.type_range πŸ“‹Chrome1/25/2010 Firefox8/6/20131289
WebView Android: Pre-Chromium Android WebView recognizes the range type, but doesn't implement a range-specific control.
http.headers.Content-Security-Policy πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
Internet Explorer: Only supporting 'sandbox' directive.
http.headers.Content-Security-Policy.default-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.font-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.frame-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.img-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.media-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.object-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.report-uri πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.script-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy.style-src πŸ“‹Chrome2/21/2013 Firefox8/6/2013166
http.headers.Content-Security-Policy-Report-Only πŸ“‹Chrome2/21/2013 Firefox8/6/2013166

2013/7

API First Browser Date Last Browser Date Days Notes
api.CSS πŸ“‹Firefox6/25/2013 Chrome7/9/201314
api.CSS.supports_static πŸ“‹Firefox6/25/2013 Chrome7/9/201314
api.CSSSupportsRule πŸ“‹Firefox6/25/2013 Chrome7/9/201314
api.Navigator.registerProtocolHandler.scheme_parameter_bitcoin Firefox10/24/2006 Chrome7/9/20132450
css.at-rules.supports πŸ“‹Firefox6/25/2013 Chrome7/9/201314
css.properties.color-interpolation-filters.linearRGB πŸ“‹Firefox6/25/2013 Chrome7/9/201314
css.properties.color-interpolation-filters.sRGB πŸ“‹Firefox6/25/2013 Chrome7/9/201314
css.properties.counter-increment.list-item πŸ“‹Firefox11/9/2004 Chrome7/9/20133164
css.properties.counter-reset.list-item πŸ“‹Firefox11/9/2004 Chrome7/9/20133164
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.
javascript.builtins.Math.imul πŸ“‹Firefox4/2/2013 Chrome7/9/201398

2013/6

API First Browser Date Last Browser Date Days Notes
api.Element.copy_event πŸ“‹Chrome12/11/2008 Firefox6/25/20131657
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“‹Chrome12/11/2008 Firefox6/25/20131657
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“‹Chrome12/11/2008 Firefox6/25/20131657
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 Chrome12/13/2011 Firefox6/25/2013560
api.HTMLTemplateElement πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.HTMLTemplateElement.content πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.MediaStream.getAudioTracks πŸ“‹Chrome3/26/2013 Firefox6/25/201391
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.getVideoTracks πŸ“‹Chrome3/26/2013 Firefox6/25/201391
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.MediaStreamTrack πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.MediaStreamTrack.id πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.MediaStreamTrack.kind πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.MediaStreamTrack.label πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.Notification πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
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“‹Chrome6/26/2012 Firefox6/25/2013364
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“‹Chrome6/26/2012 Firefox6/25/2013364
api.Notification.close πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
api.Notification.close_event πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
api.Notification.error_event πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
api.Notification.requestPermission_static πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
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.show_event πŸ“‹Chrome6/26/2012 Firefox6/25/2013364
api.RTCDataChannel πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.binaryType πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.binaryType.arraybuffer_value Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.bufferedAmount πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.close πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.close_event πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.error_event πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.label πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.message_event πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.open_event πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.readyState πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannel.send πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannelEvent πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCDataChannelEvent.channel πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCIceCandidate.candidate πŸ“‹Chrome11/6/2012 Firefox6/25/2013231
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“‹Chrome11/6/2012 Firefox6/25/2013231
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“‹Chrome11/6/2012 Firefox6/25/2013231
Firefox: Before Firefox 126, the property was not read-only.Firefox for Android: Before Firefox 126, the property was not read-only.
api.RTCPeerConnection.addIceCandidate πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
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.addStream Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.addstream_event Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.close πŸ“‹Chrome11/6/2012 Firefox6/25/2013231
api.RTCPeerConnection.createAnswer πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.createDataChannel πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.createOffer πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.datachannel_event πŸ“‹Chrome2/21/2013 Firefox6/25/2013124
api.RTCPeerConnection.iceGatheringState πŸ“‹Chrome2/21/2013 Firefox6/25/2013124
api.RTCPeerConnection.icecandidate_event πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.localDescription πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.remoteDescription πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCPeerConnection.setLocalDescription πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
Firefox: Firefox does not support descriptions of type pranswer.Firefox for Android: Firefox does not support descriptions of type pranswer.
api.RTCPeerConnection.setRemoteDescription πŸ“‹Chrome1/10/2013 Firefox6/25/2013166
api.RTCSessionDescription.sdp πŸ“‹Chrome11/6/2012 Firefox6/25/2013231
api.RTCSessionDescription.type πŸ“‹Chrome11/6/2012 Firefox6/25/2013231
api.SVGAnimatedPreserveAspectRatio.animVal πŸ“‹Chrome5/25/2010 Firefox6/25/20131127
api.SVGAnimatedPreserveAspectRatio.baseVal πŸ“‹Chrome5/25/2010 Firefox6/25/20131127
api.SVGFEImageElement.preserveAspectRatio πŸ“‹Chrome5/25/2010 Firefox6/25/20131127
api.WEBGL_compressed_texture_s3tc πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.WEBGL_depth_texture πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.WEBGL_lose_context πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.WEBGL_lose_context.loseContext πŸ“‹Chrome3/26/2013 Firefox6/25/201391
api.WEBGL_lose_context.restoreContext πŸ“‹Chrome3/26/2013 Firefox6/25/201391
css.properties.background.background-clip Chrome7/31/2012 Firefox6/25/2013329
css.properties.background.background-origin Chrome7/31/2012 Firefox6/25/2013329
css.properties.flex.auto πŸ“‹Chrome7/31/2012 Firefox6/25/2013329
css.properties.flex.none πŸ“‹Chrome7/31/2012 Firefox6/25/2013329
css.properties.flex-basis.auto Chrome9/25/2012 Firefox6/25/2013273
css.properties.flex-direction.column πŸ“‹Chrome7/31/2012 Firefox6/25/2013329
css.properties.flex-direction.row πŸ“‹Chrome7/31/2012 Firefox6/25/2013329
html.elements.template πŸ“‹Chrome3/26/2013 Firefox6/25/201391
javascript.builtins.Object.is πŸ“‹Chrome5/15/2012 Firefox6/25/2013406

2013/5

API First Browser Date Last Browser Date Days Notes
api.TransitionEvent πŸ“‹Firefox3/22/2011 Chrome5/21/2013791
css.types.length.ch Firefox11/9/2004 Chrome5/21/20133115
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.
api.Crypto πŸ“‹Chrome4/27/2011 Firefox5/14/2013748
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“‹Chrome4/27/2011 Firefox5/14/2013748
Node.js: Since v17.4.0, a similar method is available via the crypto module.
api.Element.scrollHeight πŸ“‹Chrome12/11/2008 Firefox5/14/20131615
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“‹Chrome12/2/2010 Firefox5/14/2013894
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 Chrome12/11/2008 Firefox5/14/20131615
html.elements.main πŸ“‹Chrome3/26/2013 Firefox5/14/201349
javascript.builtins.parseInt.leading_zero_strings_as_decimal Chrome11/6/2012 Firefox5/14/2013189

2013/4

API First Browser Date Last Browser Date Days Notes
api.HTMLAnchorElement.download πŸ“‹Chrome10/25/2011 Firefox4/2/2013525
api.HTMLMediaElement.defaultPlaybackRate πŸ“‹Chrome9/15/2009 Firefox4/2/20131295
api.HTMLMediaElement.playbackRate πŸ“‹Chrome9/15/2009 Firefox4/2/20131295
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 Chrome12/11/2008 Firefox4/2/20131573
api.HTMLTableRowElement.insertCell.index_parameter_optional Chrome12/11/2008 Firefox4/2/20131573
api.SVGTextPathElement.method πŸ“‹Chrome12/11/2008 Firefox4/2/20131573
api.SVGTextPathElement.spacing πŸ“‹Chrome12/11/2008 Firefox4/2/20131573
api.SVGTextPathElement.startOffset πŸ“‹Chrome12/11/2008 Firefox4/2/20131573
api.Window.postMessage.transfer_parameter Chrome1/25/2010 Firefox4/2/20131163
api.XMLHttpRequest.send.body_ArrayBufferView_type Chrome9/25/2012 Firefox4/2/2013189
css.properties.justify-content.left Chrome7/31/2012 Firefox4/2/2013245
css.properties.justify-content.normal Chrome7/31/2012 Firefox4/2/2013245
css.properties.justify-content.right Chrome7/31/2012 Firefox4/2/2013245
html.elements.a.download πŸ“‹Chrome9/16/2011 Firefox4/2/2013564
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.

2013/3

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.isPointInStroke πŸ“‹Firefox2/19/2013 Chrome3/26/201335
api.EventSource.EventSource.options_withCredentials_parameter Firefox3/13/2012 Chrome3/26/2013378
api.EventSource.withCredentials πŸ“‹Firefox8/16/2011 Chrome3/26/2013588
api.MouseEvent.MouseEvent πŸ“‹Firefox3/13/2012 Chrome3/26/2013378
api.MutationObserver πŸ“‹Firefox7/17/2012 Chrome3/26/2013252
api.MutationObserver.MutationObserver πŸ“‹Firefox7/17/2012 Chrome3/26/2013252
api.Navigator.registerProtocolHandler.scheme_parameter_smsto Firefox10/24/2006 Chrome3/26/20132345
api.UIEvent.UIEvent πŸ“‹Firefox3/13/2012 Chrome3/26/2013378
api.WheelEvent.WheelEvent πŸ“‹Firefox11/20/2012 Chrome3/26/2013126
api.WheelEvent.deltaMode πŸ“‹Firefox11/20/2012 Chrome3/26/2013126
css.at-rules.media.nested-queries Firefox3/13/2012 Chrome3/26/2013378
css.properties.transition πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
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 Chrome3/26/2013168
css.properties.transition-duration πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
css.properties.transition-property πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
css.properties.transition-timing-function πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
css.properties.width.is_animatable Firefox10/9/2012 Chrome3/26/2013168
css.selectors.after.animation_and_transition_support Firefox3/22/2011 Chrome3/26/2013735
css.selectors.before.animation_and_transition_support Firefox3/22/2011 Chrome3/26/2013735
css.types.calc πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
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 Chrome3/26/20131160
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 Chrome3/26/2013168
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 Chrome3/26/2013420
css.types.gradient.radial-gradient πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
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 Chrome3/26/2013420
css.types.gradient.repeating-linear-gradient πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
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 Chrome3/26/2013420
css.types.gradient.repeating-radial-gradient πŸ“‹Firefox10/9/2012 Chrome3/26/2013168
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 Chrome3/26/2013168
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.vmax Firefox2/19/2013 Chrome3/26/201335
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 Chrome3/26/201335
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.

2013/2

API First Browser Date Last Browser Date Days Notes
css.properties.background-position.side-relative_values Firefox6/5/2012 Chrome2/21/2013261
css.types.position.four_value_syntax Firefox6/5/2012 Chrome2/21/2013261
javascript.builtins.Number.isNaN πŸ“‹Firefox8/28/2012 Chrome2/21/2013177
api.CSSPageRule πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
api.CSSPageRule.style πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
api.Document.URL πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
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“‹Chrome12/2/2010 Firefox2/19/2013810
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“‹Chrome5/15/2012 Firefox2/19/2013280
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“‹Chrome5/15/2012 Firefox2/19/2013280
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.at-rules.page πŸ“‹Chrome5/21/2009 Firefox2/19/20131370
css.properties.page-break-inside πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
css.properties.page-break-inside.auto πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
css.properties.page-break-inside.avoid πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
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 Chrome5/15/2012 Firefox2/19/2013280
css.types.global_keywords.initial πŸ“‹Chrome12/11/2008 Firefox2/19/20131531
css.types.length.vh Chrome6/26/2012 Firefox2/19/2013238
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 Chrome6/26/2012 Firefox2/19/2013238
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.IDBCursor πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBCursorWithValue πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBDatabase πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBFactory πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBIndex πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBKeyRange πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBObjectStore πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBOpenDBRequest πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBRequest πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBTransaction πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.IDBVersionChangeEvent πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.Performance.now πŸ“‹Firefox8/28/2012 Chrome1/10/2013135
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.indexedDB πŸ“‹Firefox10/9/2012 Chrome1/10/201393
api.HTMLOListElement.reversed πŸ“‹Chrome3/28/2012 Firefox1/8/2013286
api.ProgressEvent.ProgressEvent πŸ“‹Chrome12/13/2011 Firefox1/8/2013392
api.WebSocket.send πŸ“‹Chrome5/25/2010 Firefox1/8/2013959
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“‹Chrome12/11/2008 Firefox1/8/20131489
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“‹Chrome3/28/2012 Firefox1/8/2013286

2012/11

API First Browser Date Last Browser Date Days Notes
api.Event.initEvent πŸ“‹Chrome12/11/2008 Firefox11/20/20121440
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“‹Chrome5/25/2010 Firefox11/20/2012910
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“‹Chrome12/11/2008 Firefox11/20/20121440
api.WheelEvent πŸ“‹Chrome12/11/2008 Firefox11/20/20121440
html.elements.iframe.sandbox πŸ“‹Chrome5/25/2010 Firefox11/20/2012910
api.Element.id πŸ“‹Firefox11/9/2004 Chrome11/6/20122919
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.IDBCursor.advance πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.continue πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.delete πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.direction πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.key πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.primaryKey πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.source πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursor.update πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBCursorWithValue.value πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.abort_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
Internet Explorer: Unknown limitations
api.IDBDatabase.close πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.createObjectStore πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.deleteObjectStore πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.name πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.objectStoreNames πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.transaction πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.version πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBDatabase.versionchange_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBFactory.cmp πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBFactory.deleteDatabase πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBFactory.open πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
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.IDBIndex.count πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.get πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.getKey πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.keyPath πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.multiEntry πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.name πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.objectStore πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.openCursor πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.openKeyCursor πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBIndex.unique πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.bound_static πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.lower πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.lowerBound_static πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.lowerOpen πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.only_static πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.upper πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.upperBound_static πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBKeyRange.upperOpen πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.add πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.autoIncrement πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.clear πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.count πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.createIndex πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.delete πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.deleteIndex πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.get πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.index πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.indexNames πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.keyPath πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.name πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.openCursor πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.put πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBObjectStore.transaction πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBOpenDBRequest.blocked_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBOpenDBRequest.upgradeneeded_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.error πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.error_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.readyState πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.result πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.source πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.success_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBRequest.transaction πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.abort πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.abort_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.complete_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.db πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.error πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.error_event πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.mode πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBTransaction.objectStore πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBVersionChangeEvent.newVersion πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.IDBVersionChangeEvent.oldVersion πŸ“‹Firefox1/31/2012 Chrome11/6/2012280
api.Navigator.doNotTrack Firefox12/20/2011 Chrome11/6/2012322
Edge: Before version 17, Edge implemented window.doNotTrack.Firefox: In Firefox, navigator.doNotTrack returns "unspecified" instead of null.Firefox: Before Firefox 32, navigator.doNotTrack would report values of "yes" and "no" rather than "1" and "0".Firefox for Android: In Firefox for Android, navigator.doNotTrack returns "unspecified" instead of null.Firefox for Android: Before Firefox for Android 32, navigator.doNotTrack would report values of "yes" and "no" rather than "1" and "0".Internet Explorer: For IE11 and subsequent versions, use window.doNotTrack
css.properties.clip-path.html_elements Firefox6/30/2009 Chrome11/6/20121225
http.headers.DNT Firefox3/22/2011 Chrome11/6/2012595

2012/10

API First Browser Date Last Browser Date Days Notes
api.HTMLInputElement.height πŸ“‹Chrome7/31/2012 Firefox10/9/201270
api.HTMLInputElement.max πŸ“‹Chrome1/25/2010 Firefox10/9/2012988
api.HTMLInputElement.min πŸ“‹Chrome1/25/2010 Firefox10/9/2012988
api.HTMLInputElement.step πŸ“‹Chrome5/25/2010 Firefox10/9/2012868
api.HTMLInputElement.stepDown πŸ“‹Chrome5/25/2010 Firefox10/9/2012868
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“‹Chrome5/25/2010 Firefox10/9/2012868
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“‹Chrome5/25/2010 Firefox10/9/2012868
api.HTMLInputElement.width πŸ“‹Chrome7/31/2012 Firefox10/9/201270
api.HTMLMeterElement πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.high πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.low πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.max πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.min πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.optimum πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
api.HTMLMeterElement.value πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
css.properties.animation-direction.alternate-reverse πŸ“‹Chrome5/15/2012 Firefox10/9/2012147
css.properties.animation-direction.reverse πŸ“‹Chrome5/15/2012 Firefox10/9/2012147
css.properties.transform.3d Chrome6/7/2011 Firefox10/9/2012490
css.properties.transition-property.IDENT_value Chrome12/11/2008 Firefox10/9/20121398
html.elements.input.max πŸ“‹Chrome1/25/2010 Firefox10/9/2012988
html.elements.input.min πŸ“‹Chrome1/25/2010 Firefox10/9/2012988
html.elements.input.step πŸ“‹Chrome5/25/2010 Firefox10/9/2012868
html.elements.meter πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.high πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.low πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.max πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.min πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.optimum πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
html.elements.meter.value πŸ“‹Chrome9/2/2010 Firefox10/9/2012768
javascript.builtins.Number.isFinite πŸ“‹Chrome5/15/2012 Firefox10/9/2012147

2012/9

API First Browser Date Last Browser Date Days Notes
api.Element.classList πŸ“‹Firefox1/21/2010 Chrome9/25/2012978
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.className πŸ“‹Firefox11/9/2004 Chrome9/25/20122877
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.XMLHttpRequest.send.body_Blob_type Firefox10/24/2006 Chrome9/25/20122163
html.elements.datalist.input_type_email πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.datalist.input_type_number πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.datalist.input_type_search πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.datalist.input_type_tel πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.datalist.input_type_url πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.input.type_email.list πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.input.type_search.list πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.input.type_tel.list πŸ“‹Firefox3/22/2011 Chrome9/25/2012553
html.elements.input.type_url.list πŸ“‹Firefox3/22/2011 Chrome9/25/2012553

2012/8

API First Browser Date Last Browser Date Days Notes
api.File.lastModified πŸ“‹Chrome8/2/2011 Firefox8/28/2012392
api.HTMLMediaElement.played πŸ“‹Chrome9/15/2009 Firefox8/28/20121078
api.HTMLSourceElement.media πŸ“‹Chrome9/15/2009 Firefox8/28/20121078
api.SVGAnimatedRect.animVal πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
api.SVGAnimatedRect.baseVal πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
api.SVGViewElement πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
api.SVGViewElement.preserveAspectRatio πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
api.SVGViewElement.viewBox πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
css.properties.border-image πŸ“‹Chrome12/13/2011 Firefox8/28/2012259
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 Chrome12/13/2011 Firefox8/28/2012259
css.properties.border-image.optional_border_image_slice Chrome12/13/2011 Firefox8/28/2012259
css.properties.border-image-outset πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-repeat πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-repeat.repeat πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-repeat.stretch πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-slice πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
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“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-source.none πŸ“‹Chrome10/25/2011 Firefox8/28/2012308
css.properties.border-image-width.auto πŸ“‹Chrome12/13/2011 Firefox8/28/2012259
css.properties.font-feature-settings.normal πŸ“‹Chrome12/13/2011 Firefox8/28/2012259
css.properties.vector-effect πŸ“‹Chrome9/2/2010 Firefox8/28/2012726
css.properties.vector-effect.non-scaling-stroke πŸ“‹Chrome9/2/2010 Firefox8/28/2012726
css.properties.vector-effect.none πŸ“‹Chrome9/2/2010 Firefox8/28/2012726
css.properties.word-break πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
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“‹Chrome12/11/2008 Firefox8/28/20121356
css.properties.word-break.normal πŸ“‹Chrome12/11/2008 Firefox8/28/20121356
html.elements.source.media πŸ“‹Chrome9/15/2009 Firefox8/28/20121078
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“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.DataView πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.buffer πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.byteLength πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.byteOffset πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getFloat32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getFloat64 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getInt16 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getInt32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getInt8 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getUint16 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getUint32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.getUint8 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setFloat32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setFloat64 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setInt16 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setInt32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setInt8 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setUint16 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setUint32 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572
javascript.builtins.DataView.setUint8 πŸ“‹Chrome2/3/2011 Firefox8/28/2012572

2012/7

API First Browser Date Last Browser Date Days Notes
api.Blob.slice πŸ“‹Firefox6/5/2012 Chrome7/31/201256
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.HTMLFieldSetElement.elements πŸ“‹Firefox3/22/2011 Chrome7/31/2012497
css.properties.background.background-size Firefox12/20/2011 Chrome7/31/2012224
api.HTMLImageElement.x πŸ“‹Chrome12/11/2008 Firefox7/17/20121314
api.HTMLImageElement.y πŸ“‹Chrome12/11/2008 Firefox7/17/20121314
api.HTMLScriptElement.crossOrigin πŸ“‹Chrome5/15/2012 Firefox7/17/201263
api.MutationObserver.disconnect πŸ“‹Chrome3/28/2012 Firefox7/17/2012111
api.MutationObserver.observe πŸ“‹Chrome3/28/2012 Firefox7/17/2012111
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“‹Chrome6/26/2012 Firefox7/17/201221
api.MutationRecord πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.addedNodes πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.attributeName πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.attributeNamespace πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.nextSibling πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.oldValue πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.previousSibling πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.removedNodes πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.target πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
api.MutationRecord.type πŸ“‹Chrome12/13/2011 Firefox7/17/2012217
html.elements.script.crossorigin πŸ“‹Chrome5/15/2012 Firefox7/17/201263
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.

2012/6

API First Browser Date Last Browser Date Days Notes
api.Blob.Blob πŸ“‹Firefox6/5/2012 Chrome6/26/201221
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.HTMLDataListElement πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
api.HTMLDataListElement.options πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
api.HTMLFieldSetElement.disabled πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
api.HTMLInputElement.list πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
html.elements.datalist πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
Firefox for Android: The dropdown menu containing available options does not appear. See bug 1535985.
html.elements.datalist.input_type_text πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
html.elements.fieldset.disabled πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
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.input.type_text.list πŸ“‹Firefox3/22/2011 Chrome6/26/2012462
api.StorageEvent πŸ“‹Chrome12/11/2008 Firefox6/5/20121272
api.StorageEvent.StorageEvent Chrome2/8/2012 Firefox6/5/2012118
api.StorageEvent.initStorageEvent πŸ“‹Chrome1/25/2010 Firefox6/5/2012862
api.StorageEvent.key πŸ“‹Chrome12/11/2008 Firefox6/5/20121272
api.StorageEvent.newValue πŸ“‹Chrome12/11/2008 Firefox6/5/20121272
api.StorageEvent.oldValue πŸ“‹Chrome12/11/2008 Firefox6/5/20121272
api.StorageEvent.storageArea πŸ“‹Chrome9/15/2009 Firefox6/5/2012994
api.StorageEvent.url πŸ“‹Chrome9/2/2010 Firefox6/5/2012642
css.properties.background-repeat.2-value Chrome9/15/2009 Firefox6/5/2012994
css.properties.border-image-width πŸ“‹Chrome12/13/2011 Firefox6/5/2012175
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.types.angle.turn Chrome5/21/2009 Firefox6/5/20121111

2012/5

API First Browser Date Last Browser Date Days Notes
api.HTMLFieldSetElement.name πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
api.HTMLFieldSetElement.type πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
api.History.state πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
api.SVGAnimateMotionElement πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
api.SVGMPathElement πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
api.SVGMPathElement.href πŸ“‹Firefox3/22/2011 Chrome5/15/2012420
html.elements.fieldset.name πŸ“‹Firefox3/22/2011 Chrome5/15/2012420

2012/4

API First Browser Date Last Browser Date Days Notes
api.Document.createTreeWalker.whatToShow_filter_parameters_optional Chrome1/25/2010 Firefox4/24/2012820
api.SVGAnimationElement.requiredExtensions πŸ“‹Chrome5/21/2009 Firefox4/24/20121069
api.SVGAnimationElement.systemLanguage πŸ“‹Chrome5/21/2009 Firefox4/24/20121069
api.SVGGraphicsElement.requiredExtensions πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGGraphicsElement.systemLanguage πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
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“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.clear πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.getItem πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.initialize πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.insertItemBefore πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.numberOfItems πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.removeItem πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
api.SVGStringList.replaceItem πŸ“‹Chrome12/11/2008 Firefox4/24/20121230
javascript.builtins.ArrayBuffer.slice πŸ“‹Chrome2/8/2012 Firefox4/24/201276
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.compositionupdate_event πŸ“‹Firefox12/20/2011 Chrome3/28/201299
api.EventSource.url πŸ“‹Firefox8/16/2011 Chrome3/28/2012225
api.WebSocket.url πŸ“‹Firefox9/27/2011 Chrome3/28/2012183
api.XMLHttpRequest.loadend_event πŸ“‹Firefox6/21/2011 Chrome3/28/2012281
api.XMLHttpRequestUpload.loadend_event πŸ“‹Firefox6/21/2011 Chrome3/28/2012281
css.properties.max-height.none πŸ“‹Firefox11/9/2004 Chrome3/28/20122696
api.CloseEvent.CloseEvent πŸ“‹Chrome12/13/2011 Firefox3/13/201291
api.CustomEvent.CustomEvent πŸ“‹Chrome10/25/2011 Firefox3/13/2012140
api.Element.outerHTML πŸ“‹Chrome12/11/2008 Firefox3/13/20121188
api.Event.Event πŸ“‹Chrome10/25/2011 Firefox3/13/2012140
api.HTMLMediaElement.defaultMuted πŸ“‹Chrome10/25/2011 Firefox3/13/2012140
api.HTMLMediaElement.loop πŸ“‹Chrome9/15/2009 Firefox3/13/2012910
api.HashChangeEvent.HashChangeEvent πŸ“‹Chrome12/13/2011 Firefox3/13/201291
api.PageTransitionEvent.PageTransitionEvent πŸ“‹Chrome12/13/2011 Firefox3/13/201291
api.PageTransitionEvent.persisted πŸ“‹Chrome1/25/2010 Firefox3/13/2012778
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.PopStateEvent.PopStateEvent πŸ“‹Chrome12/13/2011 Firefox3/13/201291
api.WebSocket πŸ“‹Chrome5/25/2010 Firefox3/13/2012658
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“‹Chrome5/25/2010 Firefox3/13/2012658
api.WebSocket.binaryType πŸ“‹Chrome10/25/2011 Firefox3/13/2012140
api.WebSocket.protocol_rfc_6455 Chrome12/13/2011 Firefox3/13/201291
html.elements.audio.loop πŸ“‹Chrome9/15/2009 Firefox3/13/2012910
html.elements.audio.muted πŸ“‹Chrome10/25/2011 Firefox3/13/2012140
html.elements.video.loop πŸ“‹Chrome9/15/2009 Firefox3/13/2012910
http.headers.Sec-WebSocket-Accept πŸ“‹Chrome12/13/2011 Firefox3/13/201291
http.headers.Sec-WebSocket-Extensions πŸ“‹Chrome12/13/2011 Firefox3/13/201291
http.headers.Sec-WebSocket-Key πŸ“‹Chrome12/13/2011 Firefox3/13/201291
http.headers.Sec-WebSocket-Protocol πŸ“‹Chrome12/13/2011 Firefox3/13/201291
http.headers.Sec-WebSocket-Version πŸ“‹Chrome12/13/2011 Firefox3/13/201291

2012/2

API First Browser Date Last Browser Date Days Notes
api.HTMLElement.accessKey πŸ“‹Firefox6/21/2011 Chrome2/8/2012232
javascript.builtins.Function.apply.generic_arrays_as_arguments Firefox3/22/2011 Chrome2/8/2012323

2012/1

API First Browser Date Last Browser Date Days Notes
api.DOMParser.parseFromString.svg Chrome1/25/2010 Firefox1/31/2012736
api.Event.stopImmediatePropagation πŸ“‹Chrome5/25/2010 Firefox1/31/2012616
api.OES_standard_derivatives πŸ“‹Chrome3/8/2011 Firefox1/31/2012329
api.console.timeEnd_static πŸ“‹Chrome5/21/2009 Firefox1/31/2012985
api.console.time_static πŸ“‹Chrome5/21/2009 Firefox1/31/2012985
css.properties.backface-visibility.hidden πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.backface-visibility.visible πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective.none πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective-origin.bottom πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective-origin.center πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective-origin.left πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective-origin.right πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.perspective-origin.top πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.transform-origin.three_value_syntax Chrome6/7/2011 Firefox1/31/2012238
css.properties.transform-style.flat πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.properties.transform-style.preserve-3d πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.matrix3d πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
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“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.rotate3d πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.rotateX πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.rotateY πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.rotateZ πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.scale3d πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.scaleZ πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.translate3d πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
css.types.transform-function.translateZ πŸ“‹Chrome6/7/2011 Firefox1/31/2012238
html.elements.a.href.href_top Chrome12/11/2008 Firefox1/31/20121146
html.elements.bdi πŸ“‹Chrome12/13/2011 Firefox1/31/201249
html.elements.bdo πŸ“‹Chrome10/25/2011 Firefox1/31/201298

2011/12

API First Browser Date Last Browser Date Days Notes
api.CompositionEvent πŸ“‹Chrome10/25/2011 Firefox12/20/201156
api.CompositionEvent.data πŸ“‹Chrome10/25/2011 Firefox12/20/201156
api.CompositionEvent.initCompositionEvent πŸ“‹Chrome10/25/2011 Firefox12/20/201156
api.Element.compositionend_event πŸ“‹Chrome10/25/2011 Firefox12/20/201156
api.Element.compositionstart_event πŸ“‹Chrome10/25/2011 Firefox12/20/201156
api.HTMLElement.drag_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
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“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLElement.dragenter_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLElement.dragleave_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLElement.dragover_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLElement.dragstart_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLElement.drop_event πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
api.HTMLMediaElement.abort_event πŸ“‹Chrome9/15/2009 Firefox12/20/2011826
api.Node.contains πŸ“‹Chrome12/13/2011 Firefox12/20/20117
Internet Explorer: Only supported for HTMLElement, not all Node objects.
api.Node.ownerDocument πŸ“‹Chrome12/11/2008 Firefox12/20/20111104
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“‹Chrome12/11/2008 Firefox12/20/20111104
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.offline_event πŸ“‹Chrome9/15/2009 Firefox12/20/2011826
api.Window.online_event πŸ“‹Chrome9/15/2009 Firefox12/20/2011826
api.XMLHttpRequest.send.body_ArrayBuffer_type Chrome2/3/2011 Firefox12/20/2011320
api.console.groupCollapsed_static πŸ“‹Chrome9/2/2010 Firefox12/20/2011474
Node.js: Alias for console.group
api.console.groupEnd_static πŸ“‹Chrome5/21/2009 Firefox12/20/2011943
api.console.group_static πŸ“‹Chrome5/21/2009 Firefox12/20/2011943
api.console.substitution_strings Chrome12/11/2008 Firefox12/20/20111104
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.
api.HTMLTextAreaElement.wrap πŸ“‹Firefox3/22/2011 Chrome12/13/2011266
api.WebSocket.extensions πŸ“‹Firefox11/8/2011 Chrome12/13/201135
css.properties.border-image.none πŸ“‹Firefox6/30/2009 Chrome12/13/2011896
css.properties.border-image.repeat πŸ“‹Firefox6/30/2009 Chrome12/13/2011896
css.properties.border-image.round πŸ“‹Firefox6/30/2009 Chrome12/13/2011896
css.properties.border-image.space πŸ“‹Firefox6/30/2009 Chrome12/13/2011896
css.properties.border-image.stretch πŸ“‹Firefox6/30/2009 Chrome12/13/2011896
css.types.easing-function.cubic-bezier πŸ“‹Firefox3/22/2011 Chrome12/13/2011266
html.elements.textarea.wrap πŸ“‹Firefox3/22/2011 Chrome12/13/2011266

2011/11

API First Browser Date Last Browser Date Days Notes
api.CloseEvent πŸ“‹Chrome10/25/2011 Firefox11/8/201114
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.code πŸ“‹Chrome10/25/2011 Firefox11/8/201114
api.CloseEvent.reason πŸ“‹Chrome10/25/2011 Firefox11/8/201114
api.CloseEvent.wasClean πŸ“‹Chrome10/25/2011 Firefox11/8/201114
api.Element.insertAdjacentHTML πŸ“‹Chrome12/11/2008 Firefox11/8/20111062
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.FileReaderSync πŸ“‹Chrome10/19/2010 Firefox11/8/2011385
api.FileReaderSync.FileReaderSync πŸ“‹Chrome10/19/2010 Firefox11/8/2011385
api.FileReaderSync.readAsArrayBuffer πŸ“‹Chrome2/3/2011 Firefox11/8/2011278
api.FileReaderSync.readAsBinaryString πŸ“‹Chrome10/19/2010 Firefox11/8/2011385
api.FileReaderSync.readAsDataURL πŸ“‹Chrome10/19/2010 Firefox11/8/2011385
api.FileReaderSync.readAsText πŸ“‹Chrome10/19/2010 Firefox11/8/2011385
api.FileReaderSync.worker_support Chrome10/19/2010 Firefox11/8/2011385
api.HTMLImageElement.crossOrigin πŸ“‹Chrome8/2/2011 Firefox11/8/201198
api.HTMLInputElement.selectionDirection πŸ“‹Chrome10/25/2011 Firefox11/8/201114
api.HTMLMediaElement.seekable πŸ“‹Chrome9/15/2009 Firefox11/8/2011784
api.HTMLTextAreaElement.selectionDirection πŸ“‹Chrome10/25/2011 Firefox11/8/201114
api.console.dir_static πŸ“‹Chrome5/21/2009 Firefox11/8/2011901
html.elements.img.crossorigin πŸ“‹Chrome8/2/2011 Firefox11/8/201198

2011/10

API First Browser Date Last Browser Date Days Notes
api.HTMLSpanElement πŸ“‹Firefox11/9/2004 Chrome10/25/20112541
api.HTMLUnknownElement πŸ“‹Firefox11/9/2004 Chrome10/25/20112541
api.Navigator.registerProtocolHandler.scheme_parameter_irc Firefox10/24/2006 Chrome10/25/20111827
api.WebSocket.protocol πŸ“‹Firefox9/27/2011 Chrome10/25/201128
css.properties.clip-rule πŸ“‹Firefox6/30/2009 Chrome10/25/2011847
css.properties.clip-rule.evenodd πŸ“‹Firefox6/30/2009 Chrome10/25/2011847
css.properties.clip-rule.nonzero πŸ“‹Firefox6/30/2009 Chrome10/25/2011847
html.elements.dfn πŸ“‹Firefox11/9/2004 Chrome10/25/20112541
javascript.builtins.Date.UTC.optional_monthIndex Firefox3/22/2011 Chrome10/25/2011217
javascript.builtins.Function.name πŸ“‹Firefox11/9/2004 Chrome10/25/20112541

2011/9

API First Browser Date Last Browser Date Days Notes
api.File πŸ“‹Chrome8/2/2011 Firefox9/27/201156
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“‹Chrome12/11/2008 Firefox9/27/20111020
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.Performance πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
Node.js: Only available as an internal instance.
api.Performance.navigation πŸ“‹Chrome3/8/2011 Firefox9/27/2011203
api.Performance.timing πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
Node.js: Returns node specific timing object
api.PerformanceNavigation πŸ“‹Chrome3/8/2011 Firefox9/27/2011203
api.PerformanceNavigation.redirectCount πŸ“‹Chrome3/8/2011 Firefox9/27/2011203
api.PerformanceNavigation.type πŸ“‹Chrome3/8/2011 Firefox9/27/2011203
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“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.connectEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.connectStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domComplete πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domContentLoadedEventEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domContentLoadedEventStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domInteractive πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domLoading πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domainLookupEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.domainLookupStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.fetchStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.loadEventEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.loadEventStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.navigationStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.redirectEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.redirectStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.requestStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.responseEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.responseStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.unloadEventEnd πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.PerformanceTiming.unloadEventStart πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
api.WebSocket.bufferedAmount πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.close πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.close_event πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.error_event πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.message_event πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.open_event πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.WebSocket.readyState πŸ“‹Chrome5/25/2010 Firefox9/27/2011490
api.performance πŸ“‹Chrome9/2/2010 Firefox9/27/2011390
Node.js: Available as a part of the perf_hooks module.
css.properties.text-overflow πŸ“‹Chrome12/11/2008 Firefox9/27/20111020
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“‹Chrome12/11/2008 Firefox9/27/20111020
css.properties.text-overflow.ellipsis πŸ“‹Chrome12/11/2008 Firefox9/27/20111020
api.HTMLFormElement.autocomplete πŸ“‹Firefox3/22/2011 Chrome9/16/2011178
api.HTMLInputElement.autocomplete πŸ“‹Firefox3/22/2011 Chrome9/16/2011178
css.properties.table-layout πŸ“‹Firefox11/9/2004 Chrome9/16/20112502
css.properties.table-layout.auto πŸ“‹Firefox11/9/2004 Chrome9/16/20112502
css.properties.table-layout.fixed πŸ“‹Firefox11/9/2004 Chrome9/16/20112502
html.elements.form.autocomplete πŸ“‹Firefox3/22/2011 Chrome9/16/2011178
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.input.autocomplete πŸ“‹Firefox3/22/2011 Chrome9/16/2011178

2011/8

API First Browser Date Last Browser Date Days Notes
api.CustomEvent πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
api.CustomEvent.detail πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
api.CustomEvent.initCustomEvent πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
api.DOMStringMap πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.DeviceOrientationEvent πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
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“‹Chrome10/19/2010 Firefox8/16/2011301
api.DeviceOrientationEvent.alpha πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.DeviceOrientationEvent.beta πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.DeviceOrientationEvent.gamma πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.Document.scroll_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.Element.click_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
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“‹Chrome12/11/2008 Firefox8/16/2011978
api.Element.dblclick_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
Firefox: Starting in Firefox 68, dblclick events are only sent for the primary mouse button, per the specification.
api.Element.input_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
Edge: Not supported on select, checkbox, or radio inputs.Internet Explorer: Only supports input of type text and password.
api.Element.keydown_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.Element.keypress_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
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“‹Chrome12/11/2008 Firefox8/16/2011978
api.Element.mousedown_event πŸ“‹Chrome5/21/2009 Firefox8/16/2011817
api.Element.mousemove_event πŸ“‹Chrome5/21/2009 Firefox8/16/2011817
api.Element.mouseout_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.Element.mouseover_event πŸ“‹Chrome5/21/2009 Firefox8/16/2011817
api.Element.mouseup_event πŸ“‹Chrome5/21/2009 Firefox8/16/2011817
api.Element.scroll_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.Event.defaultPrevented πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
api.EventSource πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.EventSource πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.close πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.error_event πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.message_event πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.open_event πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventSource.readyState πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.EventTarget.addEventListener.useCapture_parameter_optional Chrome12/11/2008 Firefox8/16/2011978
api.EventTarget.removeEventListener.useCapture_parameter_optional Chrome12/11/2008 Firefox8/16/2011978
api.HTMLElement.dataset πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.HTMLFormElement.reset_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.HTMLInputElement.select_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.HTMLMediaElement.error_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.HTMLMediaElement.loadstart_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.HTMLMediaElement.progress_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.HTMLMediaElement.volumechange_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.HTMLMediaElement.waiting_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.HTMLProgressElement πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.HTMLProgressElement.max πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.HTMLProgressElement.position πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.HTMLProgressElement.value πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
api.HTMLTextAreaElement.select_event πŸ“‹Chrome12/11/2008 Firefox8/16/2011978
api.HashChangeEvent.newURL πŸ“‹Chrome12/2/2010 Firefox8/16/2011257
api.HashChangeEvent.oldURL πŸ“‹Chrome12/2/2010 Firefox8/16/2011257
api.MediaQueryList πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.MediaQueryList.addListener πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.MediaQueryList.matches πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.MediaQueryList.media πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.MediaQueryList.removeListener πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.OES_texture_float πŸ“‹Chrome3/8/2011 Firefox8/16/2011161
api.Window.blur_event πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
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.deviceorientation_event πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
api.Window.error_event πŸ“‹Chrome3/8/2011 Firefox8/16/2011161
api.Window.focus_event πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
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“‹Chrome2/3/2011 Firefox8/16/2011194
api.Window.pagehide_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.Window.pageshow_event πŸ“‹Chrome9/15/2009 Firefox8/16/2011700
api.XMLHttpRequest.response πŸ“‹Chrome2/3/2011 Firefox8/16/2011194
api.console.trace_static πŸ“‹Chrome5/21/2009 Firefox8/16/2011817
css.selectors.indeterminate.progress Chrome9/2/2010 Firefox8/16/2011348
html.elements.progress πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
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“‹Chrome9/2/2010 Firefox8/16/2011348
html.elements.progress.value πŸ“‹Chrome9/2/2010 Firefox8/16/2011348
html.global_attributes.data_attributes πŸ“‹Chrome10/19/2010 Firefox8/16/2011301
http.headers.Upgrade πŸ“‹Chrome5/25/2010 Firefox8/16/2011448
api.File.name πŸ“‹Firefox1/21/2010 Chrome8/2/2011558
api.Navigator.registerProtocolHandler πŸ“‹Firefox10/24/2006 Chrome8/2/20111743
Chrome: From Chrome 77, the URL parameter only accepts http or https URLs.
api.Navigator.registerProtocolHandler.scheme_parameter_mailto Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_mms Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_news Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_nntp Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_sms Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_tel Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_urn Firefox10/24/2006 Chrome8/2/20111743
api.Navigator.registerProtocolHandler.scheme_parameter_webcal Firefox10/24/2006 Chrome8/2/20111743
css.properties.image-rendering πŸ“‹Firefox1/21/2010 Chrome8/2/2011558
css.properties.image-rendering.auto πŸ“‹Firefox1/21/2010 Chrome8/2/2011558
css.properties.text-rendering.geometricPrecision Firefox11/9/2004 Chrome8/2/20112457
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.

2011/6

API First Browser Date Last Browser Date Days Notes
api.CSSKeyframeRule.keyText πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.CSSKeyframeRule.style πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.CSSKeyframesRule.cssRules πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.CSSKeyframesRule.deleteRule πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.CSSKeyframesRule.findRule πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.CSSKeyframesRule.name πŸ“‹Chrome12/11/2008 Firefox6/21/2011922
api.console.debug_static πŸ“‹Chrome5/21/2009 Firefox6/21/2011761
Node.js: Since Node.js 8.10.0, this method is an alias for console.log.
css.properties.animation.alternate πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.alternate-reverse πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.auto πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.backwards πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.both πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.ease πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.ease-in πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.ease-in-out πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.ease-out πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.forwards πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.infinite πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.linear πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.none πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.normal πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.paused πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.reverse πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.running πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.step-end πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation.step-start πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-direction.alternate πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-direction.normal πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-fill-mode.backwards πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-fill-mode.both πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-fill-mode.forwards πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-fill-mode.none πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-iteration-count.infinite πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-name.none πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-play-state.paused πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-play-state.running πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.ease πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.ease-in πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.ease-in-out πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.ease-out πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.linear πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.step-end πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.animation-timing-function.step-start πŸ“‹Chrome9/15/2009 Firefox6/21/2011644
css.properties.resize.block_level_support Chrome1/25/2010 Firefox6/21/2011512
Firefox: resize doesn't have any effect on <iframe>. See bug 680823)
api.HTMLAnchorElement.ping πŸ“‹Firefox11/9/2004 Chrome6/7/20112401
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 Chrome6/7/20112401
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.a.ping πŸ“‹Firefox11/9/2004 Chrome6/7/20112401
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 Chrome6/7/20112401
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.

2011/4

API First Browser Date Last Browser Date Days Notes
api.Window.getComputedStyle.pseudo_element_support Firefox6/30/2009 Chrome4/27/2011666
css.properties.quotes πŸ“‹Firefox11/29/2005 Chrome4/27/20111975
css.properties.quotes.none πŸ“‹Firefox11/29/2005 Chrome4/27/20111975

2011/3

API First Browser Date Last Browser Date Days Notes
api.Blob πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
Node.js: Available as a part of the buffer module.Node.js: Available as a part of the buffer module.
api.Blob.size πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
api.Blob.type πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
api.DOMImplementation.createHTMLDocument πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
Internet Explorer: The title parameter is required, but can be empty string.
api.Document.readystatechange_event πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.FormData πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.FormData.append πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLButtonElement.formAction πŸ“‹Chrome2/3/2011 Firefox3/22/201147
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“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLButtonElement.formMethod πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLButtonElement.formNoValidate πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLButtonElement.formTarget πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLButtonElement.setCustomValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLButtonElement.validity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLButtonElement.willValidate πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.HTMLCanvasElement.webglcontextlost_event πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLCanvasElement.webglcontextrestored_event πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLElement.hidden πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.HTMLElement.isContentEditable πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.HTMLFieldSetElement.checkValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLFieldSetElement.setCustomValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLFieldSetElement.validity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLFieldSetElement.willValidate πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.HTMLFormElement.checkValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLFormElement.noValidate πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.checkValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.formAction πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLInputElement.formEnctype πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLInputElement.formMethod πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLInputElement.formNoValidate πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.formTarget πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLInputElement.invalid_event πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.HTMLInputElement.pattern πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.placeholder πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
api.HTMLInputElement.required πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.setCustomValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLInputElement.validity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLInputElement.willValidate πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.HTMLLabelElement.control πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.HTMLMediaElement.buffered πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
api.HTMLMediaElement.preload πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLObjectElement.checkValidity πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.HTMLObjectElement.setCustomValidity πŸ“‹Chrome3/8/2011 Firefox3/22/201114
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“‹Chrome3/8/2011 Firefox3/22/201114
api.HTMLObjectElement.validity πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.HTMLObjectElement.willValidate πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLOptionsCollection.remove πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.HTMLOutputElement πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.checkValidity πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.defaultValue πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.form πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.htmlFor πŸ“‹Chrome2/3/2011 Firefox3/22/201147
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“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.setCustomValidity πŸ“‹Chrome2/3/2011 Firefox3/22/201147
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“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.validationMessage πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.validity πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.value πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLOutputElement.willValidate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.HTMLSelectElement.checkValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLSelectElement.required πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.HTMLSelectElement.setCustomValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLSelectElement.validity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLSelectElement.willValidate πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.HTMLTextAreaElement.checkValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLTextAreaElement.maxLength πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLTextAreaElement.placeholder πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLTextAreaElement.required πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLTextAreaElement.setCustomValidity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome5/25/2010 Firefox3/22/2011301
api.HTMLTextAreaElement.validity πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.HTMLTextAreaElement.willValidate πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.History.pushState πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome9/15/2009 Firefox3/22/2011553
api.PopStateEvent πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.PopStateEvent.state πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.Range.getBoundingClientRect πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.Range.getClientRects πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.SVGAElement.href πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.SVGAnimateElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimateTransformElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.beginElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.beginElementAt πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.endElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.endElementAt πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.getCurrentTime πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.getSimpleDuration πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.getStartTime πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGAnimationElement.targetElement πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.SVGElement.load_event πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome5/21/2009 Firefox3/22/2011670
api.Selection.modify πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TimeRanges πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.TimeRanges.end πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.TimeRanges.length πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.TimeRanges.start πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
api.TransitionEvent.elapsedTime πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.TransitionEvent.propertyName πŸ“‹Chrome5/21/2009 Firefox3/22/2011670
api.TreeWalker πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.currentNode πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.filter πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.firstChild πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.lastChild πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.nextNode πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.nextSibling πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.parentNode πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.previousNode πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.previousSibling πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.root πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.TreeWalker.whatToShow πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.ValidityState πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.customError πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.patternMismatch πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.rangeOverflow πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.rangeUnderflow πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.stepMismatch πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.tooLong πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.valid πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.ValidityState.valueMissing πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
api.WebGLActiveInfo πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLActiveInfo.name πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLActiveInfo.size πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLActiveInfo.type πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLBuffer πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLFramebuffer πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLProgram πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLRenderbuffer πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLRenderingContext πŸ“‹Chrome2/3/2011 Firefox3/22/201147
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“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.attachShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bindAttribLocation πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bindBuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bindFramebuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bindRenderbuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bindTexture πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.blendColor πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.blendEquation πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.blendEquationSeparate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.blendFunc πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.blendFuncSeparate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bufferData πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.bufferSubData πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.canvas πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.checkFramebufferStatus πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.clear πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.clearColor πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.clearDepth πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.clearStencil πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.colorMask πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.compileShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.compressedTexImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.compressedTexSubImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.copyTexImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.copyTexSubImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createBuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createFramebuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createRenderbuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.createTexture πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.cullFace πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteBuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteFramebuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteRenderbuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.deleteTexture πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.depthFunc πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.depthMask πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.depthRange πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.detachShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.disable πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.disableVertexAttribArray πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.drawArrays πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.drawElements πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.drawingBufferHeight πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.drawingBufferWidth πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.enable πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.enableVertexAttribArray πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.finish πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.flush πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.framebufferRenderbuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.framebufferTexture2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.frontFace πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.generateMipmap πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getActiveAttrib πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getActiveUniform πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getAttachedShaders πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getAttribLocation πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getBufferParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getContextAttributes πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getError πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getExtension πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getFramebufferAttachmentParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getProgramInfoLog πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getProgramParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getRenderbufferParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getShaderInfoLog πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getShaderParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getShaderPrecisionFormat πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getShaderSource πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getSupportedExtensions πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getTexParameter πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getUniform πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getUniformLocation πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getVertexAttrib πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.getVertexAttribOffset πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.hint πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isBuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isContextLost πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isEnabled πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isFramebuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isRenderbuffer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isShader πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.isTexture πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.lineWidth πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.linkProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.pixelStorei πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.polygonOffset πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.readPixels πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.renderbufferStorage πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.sampleCoverage πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.scissor πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.shaderSource πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilFunc πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilFuncSeparate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilMask πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilMaskSeparate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilOp πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.stencilOpSeparate πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.texImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGLRenderingContext.texParameterf πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.texParameteri πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.texSubImage2D πŸ“‹Chrome2/3/2011 Firefox3/22/201147
Firefox for Android: Textures from video elements are not supported. See bug 1884282.
api.WebGLRenderingContext.uniform1f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform1fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform1i πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform1iv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform2f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform2fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform2i πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform2iv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform3f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform3fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform3i πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform3iv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform4f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform4fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform4i πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniform4iv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniformMatrix2fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniformMatrix3fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.uniformMatrix4fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.useProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.validateProgram πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib1f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib1fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib2f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib2fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib3f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib3fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib4f πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttrib4fv πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.vertexAttribPointer πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLRenderingContext.viewport πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLShader πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLShaderPrecisionFormat πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLShaderPrecisionFormat.precision πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLShaderPrecisionFormat.rangeMax πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLShaderPrecisionFormat.rangeMin πŸ“‹Chrome2/3/2011 Firefox3/22/201147
api.WebGLTexture πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.WebGLUniformLocation πŸ“‹Chrome3/8/2011 Firefox3/22/201114
api.Window.popstate_event πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome1/25/2010 Firefox3/22/2011421
api.console πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
api.console.info_static πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
Node.js: Alias for console.log
api.console.log_static πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
api.console.warn_static πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
Node.js: Alias for console.error
css.properties.background.SVG_image_as_background Chrome12/11/2008 Firefox3/22/2011831
css.properties.background-clip πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.background-clip.content-box πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.background-image.svg_images Chrome12/2/2010 Firefox3/22/2011110
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“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.background-origin.content-box πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.background-size πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
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“‹Chrome1/25/2010 Firefox3/22/2011421
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 Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
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 Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
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 Chrome1/25/2010 Firefox3/22/2011421
css.properties.border-radius.elliptical_borders Chrome12/11/2008 Firefox3/22/2011831
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-radius.percentages Chrome12/2/2010 Firefox3/22/2011110
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.border-top-left-radius πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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 Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
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 Chrome1/25/2010 Firefox3/22/2011421
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.box-shadow πŸ“‹Chrome3/8/2011 Firefox3/22/201114
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.properties.resize πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
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“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.resize.horizontal πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.resize.none πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.resize.vertical πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.all πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.ease πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.ease-in πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.ease-in-out πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.ease-out πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.linear πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.none πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.step-end πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition.step-start πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-property.all πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-property.none πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.ease πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.ease-in πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.ease-in-out πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.ease-out πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.linear πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.step-end πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.properties.transition-timing-function.step-start πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
css.selectors.default πŸ“‹Chrome3/8/2011 Firefox3/22/201114
css.selectors.invalid πŸ“‹Chrome3/8/2011 Firefox3/22/201114
css.selectors.optional πŸ“‹Chrome3/8/2011 Firefox3/22/201114
css.selectors.required πŸ“‹Chrome3/8/2011 Firefox3/22/201114
css.selectors.valid πŸ“‹Chrome3/8/2011 Firefox3/22/201114
css.selectors.visited.privacy_measures Chrome9/2/2010 Firefox3/22/2011201
css.types.easing-function πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
css.types.easing-function.steps πŸ“‹Chrome12/2/2010 Firefox3/22/2011110
css.types.time πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
html.elements.article πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.aside πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.audio.preload πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
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 Chrome12/11/2008 Firefox3/22/2011831
html.elements.button.form Chrome2/3/2011 Firefox3/22/201147
html.elements.button.formaction Chrome2/3/2011 Firefox3/22/201147
html.elements.button.formenctype Chrome2/3/2011 Firefox3/22/201147
html.elements.button.formmethod Chrome2/3/2011 Firefox3/22/201147
html.elements.button.formnovalidate Chrome2/3/2011 Firefox3/22/201147
html.elements.button.formtarget Chrome2/3/2011 Firefox3/22/201147
html.elements.figcaption πŸ“‹Chrome12/2/2010 Firefox3/22/2011110
html.elements.figure πŸ“‹Chrome12/2/2010 Firefox3/22/2011110
html.elements.footer πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.form.novalidate πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.header πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.hgroup πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.input.formaction πŸ“‹Chrome2/3/2011 Firefox3/22/201147
html.elements.input.formenctype πŸ“‹Chrome2/3/2011 Firefox3/22/201147
html.elements.input.formmethod πŸ“‹Chrome2/3/2011 Firefox3/22/201147
html.elements.input.formnovalidate πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
html.elements.input.formtarget πŸ“‹Chrome2/3/2011 Firefox3/22/201147
html.elements.input.pattern πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
html.elements.input.placeholder πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
html.elements.input.required πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
html.elements.input.type_search πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.input.type_tel πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
Chrome: The field type doesn't demonstrate any special behavior.Safari: The field type doesn't demonstrate any special behavior.
html.elements.mark πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
html.elements.nav πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.output πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.output.for πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.output.form πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.output.name πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.plaintext πŸ“‹Chrome12/11/2008 Firefox3/22/2011831
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
html.elements.section πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
html.elements.select.required πŸ“‹Chrome3/8/2011 Firefox3/22/201114
html.elements.textarea.maxlength πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
html.elements.textarea.required πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
html.elements.video.preload πŸ“‹Chrome9/15/2009 Firefox3/22/2011553
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.
html.global_attributes.hidden πŸ“‹Chrome3/8/2011 Firefox3/22/201114
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.
http.headers.Strict-Transport-Security πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
http.headers.X-Frame-Options πŸ“‹Chrome1/25/2010 Firefox3/22/2011421
http.headers.X-Frame-Options.SAMEORIGIN Chrome1/25/2010 Firefox3/22/2011421
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“‹Chrome1/25/2010 Firefox3/22/2011421
javascript.builtins.ArrayBuffer πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.ArrayBuffer.ArrayBuffer πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.ArrayBuffer.byteLength πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Date.parse.iso_8601 Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Float32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Float32Array.Float32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Float64Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Float64Array.Float64Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Function.bind πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int16Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int16Array.Int16Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int32Array.Int32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int8Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Int8Array.Int8Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Object.create πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
javascript.builtins.Object.defineProperties πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
javascript.builtins.Object.defineProperty πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Object.getOwnPropertyDescriptor πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
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“‹Chrome5/25/2010 Firefox3/22/2011301
javascript.builtins.Object.isExtensible πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Object.isFrozen πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Object.isSealed πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Object.keys πŸ“‹Chrome5/25/2010 Firefox3/22/2011301
javascript.builtins.Object.preventExtensions πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.Object.seal πŸ“‹Chrome9/2/2010 Firefox3/22/2011201
javascript.builtins.TypedArray πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.BYTES_PER_ELEMENT πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.buffer πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.byteLength πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.byteOffset πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.length πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.name πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.set πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.TypedArray.subarray πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint16Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint16Array.Uint16Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint32Array.Uint32Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint8Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint8Array.Uint8Array πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint8ClampedArray πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
javascript.builtins.Uint8ClampedArray.Uint8ClampedArray πŸ“‹Chrome10/19/2010 Firefox3/22/2011154
api.SVGElement.error_event πŸ“‹Firefox11/29/2005 Chrome3/8/20111925

2011/2

API First Browser Date Last Browser Date Days Notes
api.External.IsSearchProviderInstalled πŸ“‹Firefox10/24/2006 Chrome2/3/20111563
api.HTMLElement.click πŸ“‹Firefox6/17/2008 Chrome2/3/2011961
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.HTMLElement.spellcheck πŸ“‹Firefox10/24/2006 Chrome2/3/20111563
html.global_attributes.spellcheck πŸ“‹Firefox10/24/2006 Chrome2/3/20111563
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>.

2010/12

API First Browser Date Last Browser Date Days Notes
api.DOMTokenList πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.add πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.contains πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.item πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.length πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.remove πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.toString πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.DOMTokenList.toggle πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.HashChangeEvent πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
api.Window.hashchange_event πŸ“‹Firefox1/21/2010 Chrome12/2/2010315
Chrome: A regular Event object is fired, rather than a HashChangeEvent object.
html.elements.link.rel.prefetch πŸ“‹Firefox10/24/2006 Chrome12/2/20101500
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

2010/10

API First Browser Date Last Browser Date Days Notes
api.SVGSVGElement.getElementById πŸ“‹Firefox11/29/2005 Chrome10/19/20101785

2010/9

API First Browser Date Last Browser Date Days Notes
api.FileReader πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
Firefox: Before Firefox 4, Blob parameters were File parameters.
api.FileReader.FileReader πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.abort πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.abort_event πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.error πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
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 Chrome9/2/2010224
api.FileReader.load_event πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.loadend_event πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.progress_event πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.readAsArrayBuffer πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.readAsBinaryString πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.readAsDataURL πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
Firefox for Android: Using the camera in Android 8.x raises an exception. See bug 1511083.
api.FileReader.readAsText πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.readyState πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.FileReader.result πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.HTMLScriptElement.async πŸ“‹Firefox1/21/2010 Chrome9/2/2010224
api.SVGAnimatedBoolean πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedBoolean.animVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedBoolean.baseVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedInteger πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedInteger.animVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedInteger.baseVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedNumberList πŸ“‹Firefox11/29/2005 Chrome9/2/20101738
api.SVGAnimatedNumberList.animVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGAnimatedNumberList.baseVal πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.bias πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.divisor πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.edgeMode πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.height πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.in1 πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.kernelMatrix πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.orderX πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.orderY πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.preserveAlpha πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.result πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.targetX πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.targetY πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.width πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.x πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGFEConvolveMatrixElement.y πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList πŸ“‹Firefox11/29/2005 Chrome9/2/20101738
api.SVGNumberList.appendItem πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.clear πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.getItem πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.initialize πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.insertItemBefore πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.numberOfItems πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.removeItem πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.SVGNumberList.replaceItem πŸ“‹Firefox6/17/2008 Chrome9/2/2010807
api.XMLHttpRequest.send.body_FormData_type Firefox10/24/2006 Chrome9/2/20101409
css.at-rules.font-face.WOFF πŸ“‹Firefox6/30/2009 Chrome9/2/2010429
css.properties.list-style-type.ethiopic-halehame-ti-er Firefox11/9/2004 Chrome9/2/20102123
css.properties.list-style-type.ethiopic-halehame-ti-et Firefox11/9/2004 Chrome9/2/20102123
css.properties.list-style-type.hangul Firefox11/9/2004 Chrome9/2/20102123
css.properties.list-style-type.hangul-consonant Firefox11/9/2004 Chrome9/2/20102123

2010/5

API First Browser Date Last Browser Date Days Notes
api.Geolocation πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
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 Chrome5/25/2010329
api.Geolocation.getCurrentPosition πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.Geolocation.watchPosition πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.accuracy πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.altitude πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.altitudeAccuracy πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.heading πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.latitude πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.longitude πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationCoordinates.speed πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationPosition.coords πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationPosition.timestamp πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationPositionError.code πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.GeolocationPositionError.message πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.Navigator.geolocation πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
api.SVGAnimatedPreserveAspectRatio πŸ“‹Firefox11/29/2005 Chrome5/25/20101638
api.SVGComponentTransferFunctionElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.amplitude πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.exponent πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.intercept πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.offset πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.slope πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.tableValues πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGComponentTransferFunctionElement.type πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.in2 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.mode πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEBlendElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.type πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.values πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEColorMatrixElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEComponentTransferElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEComponentTransferElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.in2 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.k1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.k2 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.k3 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.k4 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.operator πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFECompositeElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.diffuseConstant πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.kernelUnitLengthX πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.kernelUnitLengthY πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.surfaceScale πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDiffuseLightingElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.in2 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.scale πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.xChannelSelector πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDisplacementMapElement.yChannelSelector πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDistantLightElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDistantLightElement.azimuth πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEDistantLightElement.elevation πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEFloodElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEFuncAElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEFuncBElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEFuncGElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEFuncRElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEGaussianBlurElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEGaussianBlurElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEGaussianBlurElement.setStdDeviation πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEGaussianBlurElement.stdDeviationX πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEGaussianBlurElement.stdDeviationY πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.href πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEImageElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeNodeElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMergeNodeElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.operator πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.radiusX πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.radiusY πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEMorphologyElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.dx πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.dy πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEOffsetElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEPointLightElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEPointLightElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEPointLightElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFEPointLightElement.z πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.specularConstant πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.specularExponent πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.surfaceScale πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpecularLightingElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.limitingConeAngle πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.pointsAtX πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.pointsAtY πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.pointsAtZ πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.specularExponent πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFESpotLightElement.z πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.in1 πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETileElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.baseFrequencyX πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.baseFrequencyY πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.numOctaves πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.result πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.seed πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.stitchTiles πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.type πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFETurbulenceElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.filterUnits πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.height πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.href πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.primitiveUnits πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.width πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.x πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
api.SVGFilterElement.y πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.cursor.none πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
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.flood-color πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.flood-color.currentColor πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.flood-color.transparent πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.flood-opacity πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.lighting-color πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.lighting-color.currentColor πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
css.properties.lighting-color.transparent πŸ“‹Firefox6/17/2008 Chrome5/25/2010707
html.elements.input.type_email πŸ“‹Firefox11/9/2004 Chrome5/25/20102023
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.
javascript.builtins.Object.getPrototypeOf πŸ“‹Firefox6/30/2009 Chrome5/25/2010329
javascript.statements.debugger πŸ“‹Firefox11/9/2004 Chrome5/25/20102023

2010/1

API First Browser Date Last Browser Date Days Notes
api.DedicatedWorkerGlobalScope πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.DedicatedWorkerGlobalScope.close πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.DedicatedWorkerGlobalScope.message_event πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.DedicatedWorkerGlobalScope.postMessage πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
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.EventTarget.dispatchEvent πŸ“‹Firefox10/24/2006 Chrome1/25/20101189
Internet Explorer: Older versions of IE supported an equivalent, proprietary EventTarget.fireEvent() method.
api.HTMLAudioElement.Audio πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.HTMLElement.draggable πŸ“‹Firefox10/24/2006 Chrome1/25/20101189
api.HTMLTextAreaElement.textLength πŸ“‹Firefox11/9/2004 Chrome1/25/20101903
api.MessageEvent.ports πŸ“‹Firefox6/17/2008 Chrome1/25/2010587
api.PageTransitionEvent πŸ“‹Firefox11/29/2005 Chrome1/25/20101518
api.Storage πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.clear πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.getItem πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.key πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.length πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.removeItem πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Storage.setItem πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.Window.localStorage πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
Deno: The key used for the Web Storage bucket is based on various factors. See the Deno manual.
api.Window.sessionStorage πŸ“‹Firefox10/24/2006 Chrome1/25/20101189
api.Worker.Worker πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
Node.js: Takes entirely different options parameters.
api.Worker.error_event πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
Node.js: Supports the event, but only via Node EventEmitter.
api.Worker.message_event πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
Node.js: Supports the event, but only via Node EventEmitter.
api.WorkerGlobalScope πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerGlobalScope.error_event πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerGlobalScope.location πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerGlobalScope.navigator πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerGlobalScope.self πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.hash πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.host πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.hostname πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.href πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.pathname πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.port πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.protocol πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.search πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerLocation.toString πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator.appCodeName πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator.appName πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator.appVersion πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator.language πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
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.onLine πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
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“‹Firefox6/30/2009 Chrome1/25/2010209
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.product πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.WorkerNavigator.userAgent πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.XMLHttpRequest.worker_support Firefox6/30/2009 Chrome1/25/2010209
api.atob πŸ“‹Firefox11/9/2004 Chrome1/25/20101903
api.btoa πŸ“‹Firefox11/9/2004 Chrome1/25/20101903
css.at-rules.font-face.font-family πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
css.at-rules.font-face.font-style πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
css.at-rules.font-face.font-variant Firefox6/30/2009 Chrome1/25/2010209
css.at-rules.font-face.font-weight πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
css.at-rules.font-face.src πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
css.properties.text-rendering πŸ“‹Firefox11/9/2004 Chrome1/25/20101903
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 Chrome1/25/20101903
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.selectors.first-child πŸ“‹Firefox6/17/2008 Chrome1/25/2010587
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.selectors.nth-last-child πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
css.selectors.nth-last-of-type πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
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.length.rem Firefox1/21/2010 Chrome1/25/20104
html.elements.link.rel.icon Firefox10/24/2006 Chrome1/25/20101189
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.draggable πŸ“‹Firefox10/24/2006 Chrome1/25/20101189
http.data-url πŸ“‹Firefox10/24/2006 Chrome1/25/20101189
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 Chrome1/25/20101189
http.data-url.html_files Firefox10/24/2006 Chrome1/25/20101189
http.data-url.js_files Firefox10/24/2006 Chrome1/25/20101189
http.headers.Access-Control-Allow-Credentials πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Allow-Headers πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Allow-Methods πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Allow-Origin πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Expose-Headers πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Max-Age πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Request-Headers πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
http.headers.Access-Control-Request-Method πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
javascript.builtins.String.trim πŸ“‹Firefox6/30/2009 Chrome1/25/2010209
api.DataTransfer.files πŸ“‹Chrome9/15/2009 Firefox1/21/2010128
api.Document.readyState πŸ“‹Chrome12/11/2008 Firefox1/21/2010406
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“‹Chrome12/11/2008 Firefox1/21/2010406
api.HTMLInputElement.multiple πŸ“‹Chrome5/21/2009 Firefox1/21/2010245
api.HTMLVideoElement.poster πŸ“‹Chrome9/15/2009 Firefox1/21/2010128
css.properties.background.multiple_backgrounds Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-attachment.multiple_backgrounds Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-image.gradients πŸ“‹Chrome12/11/2008 Firefox1/21/2010406
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 Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-position.multiple_backgrounds Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-repeat.multiple_backgrounds Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-size.auto πŸ“‹Chrome12/11/2008 Firefox1/21/2010406
css.properties.background-size.contain πŸ“‹Chrome9/15/2009 Firefox1/21/2010128
css.properties.background-size.cover πŸ“‹Chrome9/15/2009 Firefox1/21/2010128
css.properties.pointer-events.html_elements Chrome5/21/2009 Firefox1/21/2010245
css.selectors.indeterminate.checkbox Chrome12/11/2008 Firefox1/21/2010406
css.types.angle πŸ“‹Chrome5/21/2009 Firefox1/21/2010245
css.types.angle.deg Chrome5/21/2009 Firefox1/21/2010245
css.types.angle.grad Chrome5/21/2009 Firefox1/21/2010245
css.types.angle.rad Chrome5/21/2009 Firefox1/21/2010245
css.types.angle-percentage πŸ“‹Chrome5/21/2009 Firefox1/21/2010245
html.elements.input.multiple πŸ“‹Chrome5/21/2009 Firefox1/21/2010245
html.elements.script.async πŸ“‹Chrome12/11/2008 Firefox1/21/2010406
html.elements.video.poster πŸ“‹Chrome9/15/2009 Firefox1/21/2010128

2009/9

API First Browser Date Last Browser Date Days Notes
api.DataTransfer πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.dropEffect πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.effectAllowed πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.getData πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.setData πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.setDragImage πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.DataTransfer.types πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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.HTMLAudioElement πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.autoplay πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.canPlayType πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.canplaythrough_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.controls πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.currentSrc πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.currentTime πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.duration πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.durationchange_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.emptied_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.ended πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.ended_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.error πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.load πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.loadeddata_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.loadedmetadata_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.muted πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.networkState πŸ“‹Firefox6/30/2009 Chrome9/15/200977
Firefox: The NETWORK_LOADED state was removed to align with the HTML spec in Firefox 4.
api.HTMLMediaElement.pause πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.pause_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.paused πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.play πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.play_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.playing_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.ratechange_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.readyState πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.seeked_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.seeking πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.seeking_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.src πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.stalled_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.suspend_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.timeupdate_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLMediaElement.volume πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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.HTMLSourceElement πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLSourceElement.src πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLSourceElement.type πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLVideoElement πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLVideoElement.height πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLVideoElement.resize_event πŸ“‹Firefox6/30/2009 Chrome9/15/200977
Edge: The onresize event handler property is not supported.Internet Explorer: The onresize event handler property is not supported.
api.HTMLVideoElement.videoHeight πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLVideoElement.videoWidth πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.HTMLVideoElement.width πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.MediaError.code πŸ“‹Firefox6/30/2009 Chrome9/15/200977
api.XMLHttpRequest.withCredentials πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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.clearInterval.worker_support Firefox6/30/2009 Chrome9/15/200977
api.clearTimeout.worker_support Firefox6/30/2009 Chrome9/15/200977
api.setInterval.worker_support Firefox6/30/2009 Chrome9/15/200977
api.setTimeout.worker_support Firefox6/30/2009 Chrome9/15/200977
css.at-rules.media.aspect-ratio πŸ“‹Firefox6/30/2009 Chrome9/15/200977
css.at-rules.media.orientation πŸ“‹Firefox10/24/2006 Chrome9/15/20091057
css.types.ratio πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.audio πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.audio.src πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.source πŸ“‹Firefox6/30/2009 Chrome9/15/200977
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“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.source.type πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video.autoplay πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video.controls πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video.height πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video.src πŸ“‹Firefox6/30/2009 Chrome9/15/200977
html.elements.video.width πŸ“‹Firefox6/30/2009 Chrome9/15/200977
javascript.builtins.Array.reduce πŸ“‹Firefox6/17/2008 Chrome9/15/2009455
javascript.builtins.Array.reduceRight πŸ“‹Firefox6/17/2008 Chrome9/15/2009455
javascript.builtins.Date.toISOString πŸ“‹Firefox11/9/2004 Chrome9/15/20091771
javascript.builtins.Date.toJSON πŸ“‹Firefox11/9/2004 Chrome9/15/20091771
javascript.builtins.Error.stack Firefox11/9/2004 Chrome9/15/20091771
javascript.builtins.JSON πŸ“‹Firefox6/30/2009 Chrome9/15/200977
javascript.builtins.JSON.parse πŸ“‹Firefox6/30/2009 Chrome9/15/200977
javascript.builtins.JSON.stringify πŸ“‹Firefox6/30/2009 Chrome9/15/200977
javascript.statements.empty πŸ“‹Firefox11/9/2004 Chrome9/15/20091771

2009/6

API First Browser Date Last Browser Date Days Notes
api.CSSFontFaceRule πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.CSSFontFaceRule.style πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.CanvasRenderingContext2D.createImageData πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.CanvasRenderingContext2D.fillText πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.CanvasRenderingContext2D.font πŸ“‹Chrome5/21/2009 Firefox6/30/200940
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.measureText πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.CanvasRenderingContext2D.strokeText πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.CanvasRenderingContext2D.textAlign πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.CanvasRenderingContext2D.textBaseline πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Document.querySelector πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.Document.querySelectorAll πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.DocumentFragment.querySelector πŸ“‹Chrome5/21/2009 Firefox6/30/200940
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.DocumentFragment.querySelectorAll πŸ“‹Chrome5/21/2009 Firefox6/30/200940
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.Element.childElementCount πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Element.children πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: Also includes non-standard HTMLCommentElement nodes.
api.Element.firstElementChild πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Element.lastElementChild πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Element.nextElementSibling πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Element.previousElementSibling πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Element.querySelector πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: querySelector() is supported, but only for CSS 2.1 selectors.
api.Element.querySelectorAll πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: querySelectorAll() is supported, but only for CSS 2.1 selectors.
api.HTMLIFrameElement.getSVGDocument πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.HTMLObjectElement.getSVGDocument πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.HTMLScriptElement.defer πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: Before Internet Explorer 10, it implemented defer by a proprietary specification. Since version 10 it conforms to the W3C specification.
api.ImageData πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ImageData.data πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ImageData.height πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ImageData.width πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.detach πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.nextNode πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.pointerBeforeReferenceNode πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.previousNode πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.referenceNode πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.root πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.NodeIterator.whatToShow πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ProgressEvent πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ProgressEvent.lengthComputable πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ProgressEvent.loaded πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.ProgressEvent.total πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.Text.wholeText πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.Worker πŸ“‹Chrome5/21/2009 Firefox6/30/200940
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.postMessage πŸ“‹Chrome5/21/2009 Firefox6/30/200940
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“‹Chrome5/21/2009 Firefox6/30/200940
Node.js: Returns a Promise.Node.js: Takes an optional callback parameter to be executed when the worker has terminated.
api.XMLHttpRequest.abort_event πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.XMLHttpRequest.loadstart_event πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
api.XMLHttpRequest.upload πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload.abort_event πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload.error_event πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload.load_event πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload.loadstart_event πŸ“‹Chrome5/21/2009 Firefox6/30/200940
api.XMLHttpRequestUpload.progress_event πŸ“‹Chrome5/21/2009 Firefox6/30/200940
css.at-rules.font-face πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.border-bottom-left-radius.elliptical_corners Chrome12/11/2008 Firefox6/30/2009201
css.properties.border-bottom-right-radius.elliptical_corners Chrome12/11/2008 Firefox6/30/2009201
css.properties.border-top-left-radius.elliptical_corners Chrome12/11/2008 Firefox6/30/2009201
css.properties.border-top-right-radius.elliptical_corners Chrome12/11/2008 Firefox6/30/2009201
css.properties.box-shadow.inset Chrome12/11/2008 Firefox6/30/2009201
Internet Explorer: inset must be the last keyword in the declaration.
css.properties.box-shadow.multiple_shadows Chrome12/11/2008 Firefox6/30/2009201
css.properties.box-shadow.none πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.box-shadow.spread_radius Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.dashed πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.dotted πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.double πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.groove πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.hidden πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.inset πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.medium πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.none πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.outset πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.ridge πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.solid πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.thick πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.thin πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule.transparent πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-color.transparent πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.dashed πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.dotted πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.double πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.groove πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.hidden πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.inset πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.none πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.outset πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.ridge πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-style.solid πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-width.medium πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-width.thick πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.column-rule-width.thin πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-wrap.break-word πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-wrap.normal πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-x πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-x.auto πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-x.scroll πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-x.visible πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-y πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-y.auto πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-y.scroll πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.overflow-y.visible πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.text-shadow πŸ“‹Chrome5/21/2009 Firefox6/30/200940
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“‹Chrome5/21/2009 Firefox6/30/200940
css.properties.transform.none πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.transform-origin.bottom πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.transform-origin.center πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.transform-origin.left πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.transform-origin.right πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.transform-origin.top πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.properties.white-space.pre-line πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.selectors.first-of-type πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
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-of-type πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
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“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.scale πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.scaleX πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.scaleY πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.skew πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
Firefox: Firefox 14 removed experimental support for skew(), but it was reintroduced in Firefox 15.
css.types.transform-function.skewX πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.skewY πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.translate πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.translateX πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
css.types.transform-function.translateY πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
html.elements.script.defer πŸ“‹Chrome12/11/2008 Firefox6/30/2009201
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

2009/5

API First Browser Date Last Browser Date Days Notes
api.CanvasRenderingContext2D.getImageData πŸ“‹Firefox10/24/2006 Chrome5/21/2009940
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 Chrome5/21/2009940
api.CanvasRenderingContext2D.setTransform πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRect.height πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRect.width πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectList.item πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectList.length πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.bottom πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.height πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.left πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.right πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.top πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.DOMRectReadOnly.width πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.Document.activeElement πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
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.Element.getBoundingClientRect πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
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 Chrome5/21/2009338
api.FileList πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.FileList.item πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.FileList.length πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.HTMLCanvasElement.toDataURL πŸ“‹Firefox10/24/2006 Chrome5/21/2009940
api.HTMLInputElement.files πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
Internet Explorer: This property is read-only.
api.MessageEvent πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.MessageEvent.data πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.MessageEvent.initMessageEvent πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.MessageEvent.lastEventId πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.MessageEvent.origin πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.MessageEvent.source πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
api.Navigator.onLine πŸ“‹Firefox11/29/2005 Chrome5/21/20091269
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.compareDocumentPosition πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
Internet Explorer: Only supports contains for elements
api.TextMetrics πŸ“‹Firefox11/29/2005 Chrome5/21/20091269
api.TextMetrics.width πŸ“‹Firefox11/29/2005 Chrome5/21/20091269
api.Window.postMessage πŸ“‹Firefox6/17/2008 Chrome5/21/2009338
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>.
css.at-rules.charset πŸ“‹Firefox11/29/2005 Chrome5/21/20091269
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.counter-increment πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.counter-increment.none πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.counter-reset πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.counter-reset.none πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.direction πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.direction.ltr πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.direction.rtl πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.font-weight πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.font-weight.bold πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.font-weight.bolder πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.font-weight.lighter πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.font-weight.normal πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.unicode-bidi πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.unicode-bidi.bidi-override πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.unicode-bidi.embed πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.properties.unicode-bidi.normal πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
css.selectors.only-child πŸ“‹Firefox11/29/2005 Chrome5/21/20091269
css.types.attr πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
html.elements.abbr πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
Firefox: Before Firefox 4, this element implemented the HTMLSpanElement interface instead of the standard HTMLElement interface.
javascript.operators.decrement πŸ“‹Firefox11/9/2004 Chrome5/21/20091654
javascript.operators.increment πŸ“‹Firefox11/9/2004 Chrome5/21/20091654

2008/12

<
API First Browser Date Last Browser Date Days Notes
api.Attr πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.localName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.namespaceURI πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.ownerElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.prefix πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.specified πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Attr.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.BarProp πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.BarProp.visible πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CDATASection πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSImportRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSImportRule.href πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSImportRule.media πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSImportRule.styleSheet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSMediaRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Chrome12/11/20081493
api.CSSRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRule.cssText πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRule.parentStyleSheet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRule.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRuleList πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRuleList.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSRuleList.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.cssText πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.getPropertyPriority πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.getPropertyValue πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.parentRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.removeProperty πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleDeclaration.setProperty πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleRule.selectorText πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleRule.style πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleSheet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleSheet.cssRules πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleSheet.deleteRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleSheet.insertRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CSSStyleSheet.ownerRule πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CanvasGradient πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
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“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasPattern πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.arc πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.arcTo πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.beginPath πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.bezierCurveTo πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.canvas πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.clearRect πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.clip πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.closePath πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.createLinearGradient πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.createPattern πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
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“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.drawImage πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.fill πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.fillRect πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.fillStyle πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.globalAlpha πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.globalCompositeOperation πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.isPointInPath πŸ“‹Firefox10/24/2006 Chrome12/11/2008779
api.CanvasRenderingContext2D.lineCap πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.lineJoin πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.lineTo πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.lineWidth πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.miterLimit πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.moveTo πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.quadraticCurveTo πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.rect πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.restore πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.rotate πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.save πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.scale πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.shadowBlur πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.shadowColor πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.shadowOffsetX πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.shadowOffsetY πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.stroke πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.strokeRect πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.strokeStyle πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CanvasRenderingContext2D.transform πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
api.CanvasRenderingContext2D.translate πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.CharacterData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.appendData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.data πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.deleteData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.insertData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.replaceData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.CharacterData.substringData πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Comment πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMException πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMException.code πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMException.message πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMException.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMImplementation πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMImplementation.createDocument πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMImplementation.createDocumentType πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMImplementation.hasFeature πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Firefox: Since Firefox 19, hasFeature() mostly returns true.
api.DOMParser πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMParser.DOMParser πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMParser.parseFromString πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMParser.parseFromString.xml Firefox11/9/2004 Chrome12/11/20081493
api.DOMStringList πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMStringList.contains πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.DOMStringList.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DOMStringList.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.DOMContentLoaded_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.adoptNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.characterSet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.createAttributeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createCDATASection πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createComment πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createDocumentFragment πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
Firefox: From version 67, creating touch events using this method is no longer supported.
api.Document.createExpression πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createNSResolver πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createNodeIterator πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createProcessingInstruction πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createRange πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createTextNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.createTreeWalker πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.defaultView πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.doctype πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.documentElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.documentURI πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.elementFromPoint πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
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.evaluate πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.execCommand.insertHTML Firefox11/9/2004 Chrome12/11/20081493
api.Document.getElementById πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.getElementsByClassName πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
api.Document.getElementsByTagName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.getElementsByTagNameNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.implementation πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.importNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.lastModified πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Chrome12/11/20081493
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.referrer πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.styleSheets πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Document.title πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.DocumentFragment πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DocumentType πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DocumentType.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DocumentType.publicId πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.DocumentType.systemId πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.DOMActivate_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.attributes πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.clientHeight πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.clientLeft πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
api.Element.clientTop πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
api.Element.clientWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.getAttribute πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.getAttributeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.getAttributeNodeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.getElementsByClassName πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
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.Element.getElementsByTagName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Firefox11/9/2004 Chrome12/11/20081493
api.Element.getElementsByTagNameNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Firefox11/9/2004 Chrome12/11/20081493
api.Element.hasAttribute πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.hasAttributeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.hasAttributes πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.innerHTML πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.localName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.namespaceURI πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.prefix πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.removeAttribute πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Edge: This function doesn't respect boolean attributes' default values. See bug 12087679.
api.Element.removeAttributeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.removeAttributeNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.scrollIntoView πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.Element.scrollTop πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.scrollWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.setAttributeNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Element.setAttributeNodeNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Node.js: Only available as an internal instance.
api.Event.bubbles πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
Node.js: This is not used in Node.js and is provided purely for completeness.
api.Event.cancelable πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.Event.currentTarget πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.eventPhase πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.Event.preventDefault πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Event.stopPropagation πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Node.js: This is not used in Node.js and is provided purely for completeness.
api.Event.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Event.timeStamp πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
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“‹Firefox11/29/2005 Chrome12/11/20081108
api.EventTarget πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
Internet Explorer: Older versions of IE supported an equivalent, proprietary EventTarget.detachEvent() method.
api.External πŸ“‹Firefox10/24/2006 Chrome12/11/2008779
api.External.AddSearchProvider πŸ“‹Firefox10/24/2006 Chrome12/11/2008779
Firefox: From Firefox 78 this function does nothing, as the specification requires.
api.HTMLAnchorElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.charset πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.coords πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.hash πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.href πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.hreflang πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.pathname πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.protocol πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.rel πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.rev πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.search πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.text πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAnchorElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.alt πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.coords πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.hash πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.href πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.noHref πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.pathname πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.protocol πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.search πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLAreaElement.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBRElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBRElement.clear πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBaseElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBaseElement.href πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBaseElement.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.aLink πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.background πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.bgColor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.link πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.text πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLBodyElement.vLink πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLButtonElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLCanvasElement πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLCanvasElement.getContext πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLCanvasElement.getContext.2d_context Firefox11/29/2005 Chrome12/11/20081108
api.HTMLCanvasElement.height πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLCanvasElement.width πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLCollection πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLCollection.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLCollection.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLCollection.namedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDListElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDListElement.compact πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDirectoryElement Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDirectoryElement.compact πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDivElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDivElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLDocument πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.blur πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLElement.change_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.contentEditable πŸ“‹Firefox6/17/2008 Chrome12/11/2008177
api.HTMLElement.dir πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.error_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.focus πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
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 Chrome12/11/20081493
api.HTMLElement.load_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.offsetHeight πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.offsetLeft πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.offsetParent πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.offsetTop πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.offsetWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.style πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLElement.tabIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.HTMLElement.title πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLEmbedElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Chrome12/11/20081493
api.HTMLEmbedElement.getSVGDocument πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.HTMLEmbedElement.height πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLEmbedElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLEmbedElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLEmbedElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLEmbedElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFieldSetElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFieldSetElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFontElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFontElement.color πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFontElement.face πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFontElement.size πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormControlsCollection πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.acceptCharset πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.action πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.elements πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.encoding πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.enctype πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.method πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.reset πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.submit πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.submit_event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFormElement.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.contentDocument πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.contentWindow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.frameBorder πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.longDesc πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.marginHeight πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.marginWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.noResize πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.scrolling πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameSetElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameSetElement.cols πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLFrameSetElement.rows πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHRElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHRElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHRElement.noShade πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHRElement.size πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHRElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHeadElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHeadingElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHeadingElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHtmlElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLHtmlElement.version πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.contentDocument πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.contentWindow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.frameBorder πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.height πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.longDesc πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.marginHeight πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.marginWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.scrolling πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLIFrameElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.Image πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.alt πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.border πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.complete πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Internet Explorer: IE reports false for broken images.
api.HTMLImageElement.height πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.hspace πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.isMap πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.longDesc πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.lowsrc πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.naturalHeight πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.naturalWidth πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.useMap πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.vspace πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLImageElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.accept πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.alt πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.checked πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.defaultChecked πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.defaultValue πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.maxLength πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.readOnly πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.select πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.selectionEnd πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.selectionStart πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.setSelectionRange πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.size πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.useMap πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLInputElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLIElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLIElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLabelElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLabelElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLabelElement.htmlFor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLegendElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLegendElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLegendElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.charset πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.hreflang πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.media πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.rel πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.rev πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.sheet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.target πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLLinkElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMapElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMapElement.areas πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMapElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMenuElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMenuElement.compact πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMetaElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMetaElement.content πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMetaElement.httpEquiv πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMetaElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLMetaElement.scheme πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLModElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLModElement.cite πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLModElement.dateTime πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOListElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOListElement.compact πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOListElement.start πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOListElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.archive πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.border πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.code πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.codeBase πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.codeType πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.contentDocument πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.data πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.declare πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.height πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.hspace πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.standby πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.useMap πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.vspace πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLObjectElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptGroupElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptGroupElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.HTMLOptGroupElement.label πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.Option πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Internet Explorer: Before Internet Explorer 9, the outerHTML of elements lose their text when constructing with new Option().
api.HTMLOptionElement.defaultSelected πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.index πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.selected πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.text πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionsCollection πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionsCollection.add πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionsCollection.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLOptionsCollection.selectedIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParagraphElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParagraphElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParamElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParamElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParamElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParamElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLParamElement.valueType πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLPreElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLPreElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLQuoteElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLQuoteElement.cite πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.charset πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.event πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.htmlFor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.src πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.text πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.textContent πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLScriptElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.HTMLSelectElement.add πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.multiple πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.namedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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 Chrome12/11/20081493
api.HTMLSelectElement.remove πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.selectedIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.size πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLSelectElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLStyleElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLStyleElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLStyleElement.media πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLStyleElement.sheet πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLStyleElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCaptionElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCaptionElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.abbr πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.axis πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.bgColor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.cellIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.ch πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.chOff πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.colSpan πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.headers πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.height πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.noWrap πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.rowSpan πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.scope πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.vAlign πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableCellElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.ch πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.chOff πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.span πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.vAlign πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableColElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.bgColor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.border πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.caption πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.cellPadding πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.cellSpacing πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.createCaption πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.createTFoot πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.createTHead πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.deleteCaption πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.deleteRow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.deleteTFoot πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.deleteTHead πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.frame πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.insertRow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.HTMLTableElement.rows πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.rules πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.summary πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.tBodies πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.tFoot πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.tHead πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableElement.width πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.bgColor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.cells πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.ch πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.chOff πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.deleteCell πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.insertCell πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.rowIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.sectionRowIndex πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableRowElement.vAlign πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.align πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.ch πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.chOff πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.deleteRow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.insertRow πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.rows πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTableSectionElement.vAlign πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.cols πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.defaultValue πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.disabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.form πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.name πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.readOnly πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.rows πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.select πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.selectionEnd πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.selectionStart πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.setSelectionRange πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTextAreaElement.value πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTitleElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLTitleElement.text πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLUListElement πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLUListElement.compact πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.HTMLUListElement.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.History πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.History.back πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.History.forward πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.History.go πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.History.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.KeyboardEvent πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.KeyboardEvent.altKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.KeyboardEvent.charCode πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.KeyboardEvent.ctrlKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.KeyboardEvent.keyCode πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
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“‹Firefox11/29/2005 Chrome12/11/20081108
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“‹Firefox11/29/2005 Chrome12/11/20081108
api.Location πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.assign πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
Deno: This method exists but has no effect in Deno. A location can be assigned using the --location runtime flag.
api.Location.hash πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.host πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.hostname πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.href πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.pathname πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.protocol πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Location.reload πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
Deno: This method exists but has no effect in Deno. A location can be assigned using the --location runtime flag.
api.Location.search πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.appendMedium πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.deleteMedium πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.mediaText πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MediaList.toString πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeType πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeType.description πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeType.enabledPlugin πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeType.suffixes πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeType.type πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeTypeArray πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeTypeArray.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MimeTypeArray.namedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.MouseEvent πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MouseEvent.altKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.button πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MouseEvent.clientX πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.MouseEvent.clientY πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.ctrlKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.initMouseEvent πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.layerX Firefox11/9/2004 Chrome12/11/20081493
api.MouseEvent.layerY Firefox11/9/2004 Chrome12/11/20081493
api.MouseEvent.metaKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.pageX πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.pageY πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.relatedTarget πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.screenX πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.screenY πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.MouseEvent.shiftKey πŸ“‹Firefox11/29/2005 Chrome12/11/20081108
api.NamedNodeMap.getNamedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.getNamedItemNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.item πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.length πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.removeNamedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.removeNamedItemNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.setNamedItem πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.NamedNodeMap.setNamedItemNS πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.appCodeName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.appName πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.appVersion πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.cookieEnabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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.Navigator.javaEnabled πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.language πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.platform πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.product πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.productSub πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.vendor πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Navigator.vendorSub πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
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“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.baseURI πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.childNodes πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.cloneNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.firstChild πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.hasChildNodes πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.insertBefore πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.isDefaultNamespace πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.isEqualNode πŸ“‹Firefox11/9/2004 Chrome12/11/20081493
api.Node.lastChild πŸ“‹Firefox11/9/2004