For a given set of browsers, what APIs are not yet in all of them.
| Not in Chrome | Not in Safari | |
|---|---|---|
| In Chrome | 98 | |
| In Safari | 8 |
Below is a list of features that are not in all of Chrome and Safari
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| html.elements.a.attributionsourceid 📋 | Safari | 4/26/2021 | 1788 | |
| html.elements.a.attributionsrc 📋 | Chrome | 5/14/2024 | 674 | |
| html.elements.a.hreftranslate | Chrome | 4/7/2020 | 2172 | |
| html.elements.a.interestfor | Chrome | 10/28/2025 | 142 | |
| html.elements.a.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3585 | |
| html.elements.a.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3585 | |
| html.elements.a.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3585 | |
| html.elements.a.target.unfencedTop | Chrome | 6/11/2024 | 646 | |
| html.elements.area.attributionsrc 📋 | Chrome | 5/14/2024 | 674 | |
| html.elements.area.interestfor | Chrome | 10/28/2025 | 142 | |
| html.elements.area.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3585 | |
| html.elements.area.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3585 | |
| html.elements.area.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3585 | |
| html.elements.audio.controlslist 📋 | Chrome | 4/19/2017 | 3256 | |
| html.elements.button.interestfor | Chrome | 10/28/2025 | 142 | |
| html.elements.dialog.closedby 📋 | Chrome | 3/4/2025 | 380 | |
| html.elements.fencedframe 📋 | Chrome | 6/11/2024 | 646 | |
| html.elements.fencedframe.allow 📋 | Chrome | 6/11/2024 | 646 | |
| html.elements.fencedframe.height 📋 | Chrome | 6/11/2024 | 646 | |
| html.elements.fencedframe.width 📋 | Chrome | 6/11/2024 | 646 | |
| html.elements.geolocation 📋 | Chrome | 1/13/2026 | 65 | |
| html.elements.geolocation.autolocate 📋 | Chrome | 1/13/2026 | 65 | |
| html.elements.geolocation.watch 📋 | Chrome | 1/13/2026 | 65 | |
| html.elements.h1.no_ua_styles_in_article_aside_nav_section 📋 | Safari | 12/12/2025 | 97 | |
| html.elements.iframe.allow.accelerometer 📋 | Chrome | 4/17/2018 | 2893 | |
| html.elements.iframe.allow.ambient-light-sensor 📋 | Chrome | 4/17/2018 | 2893 | |
| html.elements.iframe.allow.attribution-reporting 📋 | Chrome | 9/12/2023 | 919 | |
| html.elements.iframe.allow.autoplay 📋 | Chrome | 1/23/2018 | 2977 | |
| html.elements.iframe.allow.bluetooth 📋 | Chrome | 8/2/2022 | 1325 | |
| html.elements.iframe.allow.browsing-topics | Chrome | 7/18/2023 | 975 | |
| html.elements.iframe.allow.compute-pressure 📋 | Chrome | 5/14/2024 | 674 | |
| html.elements.iframe.allow.cross-origin-isolated 📋 | Chrome | 11/17/2020 | 1948 | |
| html.elements.iframe.allow.document-domain 📋 | Chrome | 1/23/2018 | 2977 | |
| html.elements.iframe.allow.encrypted-media 📋 | Chrome | 1/23/2018 | 2977 | |
| html.elements.iframe.allow.fullscreen 📋 | Chrome | 10/17/2017 | 3075 | |
| html.elements.iframe.allow.geolocation 📋 | Chrome | 1/23/2018 | 2977 | |
| html.elements.iframe.allow.gyroscope 📋 | Chrome | 4/17/2018 | 2893 | |
| html.elements.iframe.allow.hid 📋 | Chrome | 3/2/2021 | 1843 | |
| html.elements.iframe.allow.identity-credentials-get 📋 | Chrome | 2/7/2023 | 1136 | |
| html.elements.iframe.allow.idle-detection 📋 | Chrome | 9/21/2021 | 1640 | |
| html.elements.iframe.allow.local-fonts 📋 | Chrome | 6/21/2022 | 1367 | |
| html.elements.iframe.allow.magnetometer 📋 | Chrome | 4/17/2018 | 2893 | |
| html.elements.iframe.allow.midi 📋 | Chrome | 1/23/2018 | 2977 | |
| html.elements.iframe.allow.otp-credentials 📋 | Chrome | 8/31/2021 | 1661 | |
| html.elements.iframe.allow.payment 📋 | Chrome | 7/25/2017 | 3159 | |
| html.elements.iframe.allow.picture-in-picture 📋 | Chrome | 9/4/2018 | 2753 | |
| html.elements.iframe.allow.publickey-credentials-get 📋 | Chrome | 7/27/2020 | 2061 | |
| html.elements.iframe.allow.serial 📋 | Chrome | 3/2/2021 | 1843 | |
| html.elements.iframe.allow.storage-access 📋 | Chrome | 5/2/2023 | 1052 | |
| html.elements.iframe.allow.usb 📋 | Chrome | 7/25/2017 | 3159 | |
| html.elements.iframe.allow.web-share 📋 | Chrome | 10/20/2020 | 1976 | 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.allow.wildcards | Chrome | 11/29/2022 | 1206 | |
| html.elements.iframe.allow.window-management 📋 | Chrome | 3/29/2022 | 1451 | |
| html.elements.iframe.allow.xr-spatial-tracking 📋 | Chrome | 12/10/2019 | 2291 | |
| html.elements.iframe.allowpaymentrequest | Chrome | 7/25/2017 | 3159 | |
| html.elements.iframe.browsingtopics | Chrome | 6/11/2024 | 646 | |
| html.elements.iframe.credentialless 📋 | Chrome | 2/7/2023 | 1136 | |
| html.elements.iframe.csp 📋 | Chrome | 9/5/2017 | 3117 | |
| html.elements.iframe.privateToken 📋 | Chrome | 9/12/2023 | 919 | |
| html.elements.iframe.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3585 | |
| html.elements.iframe.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3585 | |
| html.elements.iframe.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3585 | |
| html.elements.iframe.sandbox.allow-orientation-lock 📋 | Chrome | 7/24/2018 | 2795 | |
| html.elements.iframe.sandbox.allow-presentation 📋 | Chrome | 8/31/2016 | 3487 | |
| html.elements.iframe.sandbox.allow-top-navigation-to-custom-protocols 📋 | Safari | 9/12/2022 | 1284 | |
| html.elements.img.attributionsrc 📋 | Chrome | 5/14/2024 | 674 | |
| html.elements.img.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3585 | |
| html.elements.img.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3585 | |
| html.elements.img.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3585 | |
| html.elements.img.sizes.auto 📋 | Chrome | 6/11/2024 | 646 | |
| html.elements.input.alpha 📋 | Safari | 3/31/2025 | 353 | |
| html.elements.input.colorspace 📋 | Safari | 3/31/2025 | 353 | |
| html.elements.input.switch | Safari | 3/5/2024 | 744 | |
| html.elements.input.type_color.accepts_css_colors 📋 | Safari | 3/31/2025 | 353 | |
| html.elements.input.type_month 📋 | Chrome | 6/26/2012 | 5014 | Safari: The input type is recognized, but there is no month-specific control. See bug 200416. |
| html.elements.input.type_range.labeled_values 📋 | Chrome | 10/7/2014 | 4181 | |
| html.elements.input.type_week 📋 | Chrome | 6/26/2012 | 5014 | |
| html.elements.link.referrerpolicy.no-referrer-when-downgrade | Chrome | 5/25/2016 | 3585 | |
| html.elements.link.referrerpolicy.origin-when-cross-origin | Chrome | 5/25/2016 | 3585 | |
| html.elements.link.referrerpolicy.unsafe-url | Chrome | 5/25/2016 | 3585 | |
| html.elements.link.rel.compression-dictionary 📋 | Chrome | 10/15/2024 | 520 | |
| html.elements.link.rel.expect 📋 | Chrome | 4/16/2024 | 702 | |
| html.elements.link.rel.modulepreload.as-style 📋 | Chrome | 4/7/2026 | -19 | |
| html.elements.link.rel.prerender | Chrome | 12/6/2017 | 3025 | Chrome: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.Chrome Android: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.Edge: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.Quest Browser: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.Opera: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.Opera Android: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post.WebView Android: Does not trigger prerendering. Triggers NoState Prefetch instead. See blog post. |
| html.elements.meta.name.application-title | Chrome | 3/4/2025 | 380 | |
| html.elements.script.attributionsrc 📋 | Chrome | 5/14/2024 | 674 | |
| html.elements.script.referrerpolicy.no-referrer-when-downgrade | Chrome | 10/16/2018 | 2711 | |
| html.elements.script.referrerpolicy.origin-when-cross-origin | Chrome | 10/16/2018 | 2711 | |
| html.elements.script.referrerpolicy.unsafe-url | Chrome | 10/16/2018 | 2711 | |
| html.elements.script.type.speculationrules.expects_no_vary_search 📋 | Chrome | 7/23/2024 | 604 | Chrome: Supported for prefetch only.Chrome Android: Supported for prefetch only.Edge: Supported for prefetch only.Opera: Supported for prefetch only.Opera Android: Supported for prefetch only.Samsung Internet: Supported for prefetch only.WebView Android: Supported for prefetch only. |
| html.elements.script.type.speculationrules.prerender 📋 | Chrome | 9/2/2022 | 1294 | |
| html.elements.script.type.speculationrules.requires 📋 | Chrome | 2/7/2023 | 1136 | |
| html.elements.script.type.speculationrules.requires.anonymous-client-ip-when-cross-origin 📋 | Chrome | 2/7/2023 | 1136 | |
| html.elements.script.type.speculationrules.target_hint 📋 | Chrome | 6/24/2025 | 268 | Chrome: Only "_blank" and "_self" are supported and only for prefetch.Chrome Android: Only "_blank" and "_self" are supported and only for prefetch.Edge: Only "_blank" and "_self" are supported and only for prefetch.Opera: Only "_blank" and "_self" are supported and only for prefetch.Opera Android: Only "_blank" and "_self" are supported and only for prefetch.WebView Android: Only "_blank" and "_self" are supported and only for prefetch. |
| html.elements.selectedcontent 📋 | Chrome | 4/1/2025 | 352 | |
| html.elements.summary.display_list_item | Chrome | 3/2/2021 | 1843 | |
| html.elements.td.rowspan.rowspan_zero | Chrome | 3/6/2018 | 2935 | |
| html.elements.textarea.autocomplete.webauthn 📋 | Chrome | 11/29/2022 | 1206 | |
| html.elements.textarea.wrap.hard | Chrome | 12/13/2011 | 5210 | |
| html.elements.video.controlslist 📋 | Chrome | 4/19/2017 | 3256 | |
| html.global_attributes.autocapitalize 📋 | Chrome | 5/19/2015 | 3957 | |
| html.global_attributes.autocorrect 📋 | Safari | 4/26/2021 | 1788 | |
| html.global_attributes.inert.ignores_find_in_page 📋 | Chrome | 4/16/2024 | 702 | |
| html.global_attributes.is 📋 | Chrome | 5/29/2018 | 2851 | |
| html.global_attributes.popover.hint 📋 | Chrome | 2/4/2025 | 408 | |
| html.global_attributes.virtualkeyboardpolicy 📋 | Chrome | 9/21/2021 | 1640 |