For a given set of browsers, what APIs are not yet in all of them.
| Not in Firefox | Not in Edge | |
|---|---|---|
| In Firefox | 36 | |
| In Edge | 158 |
Below is a list of features that are not in all of Firefox and Edge
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| html.elements.a.attributionsrc 📋 | Edge | 5/17/2024 | 879 | |
| html.elements.a.coords 📋 | Edge | 1/15/2020 | 2463 | Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed. |
| html.elements.a.href.href_sms | Firefox | 4/24/2012 | 5285 | |
| html.elements.a.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.a.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.a.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.a.shape 📋 | Edge | 1/15/2020 | 2463 | Firefox: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed.Firefox for Android: You can no longer nest an <a> element inside a <map> element to create a hotspot region - coords and shape attribute support removed. |
| html.elements.a.target.unfencedTop | Edge | 7/21/2023 | 1180 | |
| html.elements.area.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.area.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.area.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.audio.controlslist 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.audio.disableremoteplayback 📋 | Edge | 1/25/2024 | 992 | |
| html.elements.canvas.moz-opaque | Firefox | 6/30/2009 | 6314 | |
| html.elements.col.char 📋 | Edge | 7/29/2015 | 4094 | |
| html.elements.col.charoff 📋 | Edge | 7/29/2015 | 4094 | |
| html.elements.colgroup.char 📋 | Edge | 7/29/2015 | 4094 | |
| html.elements.colgroup.charoff 📋 | Edge | 7/29/2015 | 4094 | |
| html.elements.fencedframe 📋 | Edge | 7/21/2023 | 1180 | |
| html.elements.fencedframe.allow 📋 | Edge | 7/21/2023 | 1180 | |
| html.elements.fencedframe.height 📋 | Edge | 7/21/2023 | 1180 | |
| html.elements.fencedframe.width 📋 | Edge | 7/21/2023 | 1180 | |
| html.elements.form.autocomplete.new-password | Firefox | 5/21/2019 | 2702 | |
| html.elements.form.autocomplete.webauthn 📋 | Edge | 12/5/2022 | 1408 | |
| html.elements.iframe.allow.accelerometer 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allow.ambient-light-sensor 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allow.attribution-reporting 📋 | Edge | 9/15/2023 | 1124 | |
| html.elements.iframe.allow.bluetooth 📋 | Edge | 8/5/2022 | 1530 | |
| html.elements.iframe.allow.browsing-topics | Edge | 7/21/2023 | 1180 | |
| html.elements.iframe.allow.compute-pressure 📋 | Edge | 5/17/2024 | 879 | |
| html.elements.iframe.allow.cross-origin-isolated 📋 | Edge | 11/19/2020 | 2154 | |
| html.elements.iframe.allow.gamepad 📋 | Firefox | 8/10/2021 | 1890 | Firefox: The default allowlist is * instead of self (as required by the specification).Firefox for Android: The default allowlist is * instead of self (as required by the specification). |
| html.elements.iframe.allow.gyroscope 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allow.hid 📋 | Edge | 3/4/2021 | 2049 | |
| html.elements.iframe.allow.identity-credentials-get 📋 | Edge | 2/9/2023 | 1342 | |
| html.elements.iframe.allow.idle-detection 📋 | Edge | 9/24/2021 | 1845 | |
| html.elements.iframe.allow.local-fonts 📋 | Edge | 6/23/2022 | 1573 | |
| html.elements.iframe.allow.magnetometer 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allow.otp-credentials 📋 | Edge | 9/2/2021 | 1867 | |
| html.elements.iframe.allow.publickey-credentials-create 📋 | Firefox | 2/20/2024 | 966 | |
| html.elements.iframe.allow.serial 📋 | Edge | 3/4/2021 | 2049 | |
| html.elements.iframe.allow.speaker-selection 📋 | Firefox | 8/1/2023 | 1169 | Firefox for Android: Not available due to a limitation in Android (see bug 1473346). |
| html.elements.iframe.allow.storage-access 📋 | Edge | 5/5/2023 | 1257 | |
| html.elements.iframe.allow.usb 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allow.wildcards | Edge | 12/5/2022 | 1408 | |
| html.elements.iframe.allow.window-management 📋 | Edge | 4/1/2022 | 1656 | |
| html.elements.iframe.allow.xr-spatial-tracking 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.allowpaymentrequest | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.browsingtopics | Edge | 7/21/2023 | 1180 | |
| html.elements.iframe.credentialless 📋 | Edge | 2/9/2023 | 1342 | |
| html.elements.iframe.csp 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.iframe.sandbox.allow-top-navigation-to-custom-protocols 📋 | Firefox | 5/31/2022 | 1596 | |
| html.elements.img.attributionsrc 📋 | Edge | 5/17/2024 | 879 | |
| html.elements.img.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.img.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.img.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.img.sizes.auto 📋 | Edge | 6/13/2024 | 852 | |
| html.elements.input.type_month 📋 | Edge | 7/29/2015 | 4094 | Safari: The input type is recognized, but there is no month-specific control. See bug 200416. |
| html.elements.input.type_password.insecure_login_handling | Firefox | 3/7/2017 | 3507 | |
| html.elements.input.type_week 📋 | Edge | 7/29/2015 | 4094 | |
| html.elements.link.blocking 📋 | Edge | 9/1/2022 | 1503 | |
| html.elements.link.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.link.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.link.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.link.rel.alternate_stylesheet 📋 | Firefox | 6/17/2008 | 6692 | |
| html.elements.link.rel.expect 📋 | Edge | 4/18/2024 | 908 | |
| html.elements.link.rel.manifest 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.link.rel.preload.as-track | Edge | 1/15/2020 | 2463 | |
| html.elements.link.rel.prerender | Edge | 1/15/2020 | 2463 | |
| html.elements.meta.name.application-title | Edge | 3/6/2025 | 586 | |
| html.elements.meta.name.theme-color 📋 | Edge | 1/15/2020 | 2463 | Chrome: Chrome uses the color only on installed progressive web apps.Chrome: Chrome reports support, but does not actually use the color anywhere.Chrome Android: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity.Edge: Edge uses the color only on installed progressive web apps.Quest Browser: Chrome for Android does not use the color on devices with native dark mode enabled unless it's an installed progressive web app or a trusted web activity. |
| html.elements.script.attributionsrc 📋 | Edge | 5/17/2024 | 879 | |
| html.elements.script.blocking 📋 | Edge | 9/1/2022 | 1503 | |
| html.elements.script.referrerpolicy.no-referrer-when-downgrade | Edge | 1/15/2020 | 2463 | |
| html.elements.script.referrerpolicy.origin-when-cross-origin | Edge | 1/15/2020 | 2463 | |
| html.elements.script.referrerpolicy.unsafe-url | Edge | 1/15/2020 | 2463 | |
| html.elements.script.type.importmap.integrity 📋 | Edge | 7/25/2024 | 810 | |
| html.elements.script.type.importmap.multiple_import_maps 📋 | Edge | 2/6/2025 | 614 | |
| html.elements.script.type.speculationrules 📋 | Edge | 1/12/2023 | 1370 | Chrome: Initial support included same-origin prerendering only.Chrome Android: Initial support included same-origin prerendering only.Edge: Initial support included same-origin prerendering only.Quest Browser: Initial support included same-origin prerendering only.Opera: Initial support included same-origin prerendering only.Opera Android: Initial support included same-origin prerendering only.Samsung Internet: Initial support included same-origin prerendering only. |
| html.elements.script.type.speculationrules.eagerness | Edge | 1/25/2024 | 992 | |
| html.elements.script.type.speculationrules.expects_no_vary_search | Edge | 7/25/2024 | 810 | 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. |
| html.elements.script.type.speculationrules.prefetch | Edge | 2/9/2023 | 1342 | |
| html.elements.script.type.speculationrules.prerender | Edge | 9/1/2022 | 1503 | |
| html.elements.script.type.speculationrules.referrer_policy | Edge | 3/13/2023 | 1310 | |
| html.elements.script.type.speculationrules.relative_to | Edge | 1/25/2024 | 992 | |
| html.elements.script.type.speculationrules.requires | Edge | 2/9/2023 | 1342 | |
| html.elements.script.type.speculationrules.source_optional | Edge | 2/23/2024 | 963 | |
| html.elements.script.type.speculationrules.urls | Edge | 1/12/2023 | 1370 | |
| html.elements.script.type.speculationrules.where | Edge | 1/25/2024 | 992 | |
| html.elements.style.blocking 📋 | Edge | 9/1/2022 | 1503 | |
| html.elements.tbody.char | Edge | 7/29/2015 | 4094 | |
| html.elements.td.char | Edge | 7/29/2015 | 4094 | |
| html.elements.template.shadowrootserializable 📋 | Edge | 5/17/2024 | 879 | |
| html.elements.textarea.autocomplete.new-password | Firefox | 5/21/2019 | 2702 | |
| html.elements.textarea.autocomplete.webauthn 📋 | Edge | 12/5/2022 | 1408 | |
| html.elements.textarea.wrap.hard | Edge | 7/29/2015 | 4094 | |
| html.elements.tfoot.char | Edge | 7/29/2015 | 4094 | |
| html.elements.th.char | Edge | 7/29/2015 | 4094 | |
| html.elements.th.rowspan.rowspan_zero | Firefox | 8/8/2017 | 3353 | |
| html.elements.thead.char | Edge | 7/29/2015 | 4094 | |
| html.elements.tr.char | Edge | 7/29/2015 | 4094 | |
| html.elements.tr.charoff | Edge | 7/29/2015 | 4094 | |
| html.elements.video.controlslist 📋 | Edge | 1/15/2020 | 2463 | |
| html.elements.video.disableremoteplayback 📋 | Edge | 1/25/2024 | 992 | |
| html.elements.video.playsinline 📋 | Edge | 1/15/2020 | 2463 | |
| html.global_attributes.contenteditable.plaintext-only | Edge | 1/15/2020 | 2463 | |
| html.global_attributes.hidden.until-found 📋 | Edge | 5/31/2022 | 1596 | |
| html.global_attributes.virtualkeyboardpolicy 📋 | Edge | 9/24/2021 | 1845 | |
| html.global_attributes.writingsuggestions 📋 | Edge | 4/18/2024 | 908 | |
| html.manifest.background_color 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.description 📋 | Edge | 1/21/2021 | 2091 | Firefox for Android: The property parses, but has no effect. |
| html.manifest.display 📋 | Edge | 1/15/2020 | 2463 | Chrome: display and/or display_override are required for a web app to be installable.Chrome Android: display and/or display_override are required for a web app to be installable.Edge: display and/or display_override are required for a web app to be installable.Quest Browser: display and/or display_override are required for a web app to be installable.Opera: display and/or display_override are required for a web app to be installable.Opera Android: display and/or display_override are required for a web app to be installable.Samsung Internet: display and/or display_override are required for a web app to be installable.WebView Android: display and/or display_override are required for a web app to be installable. |
| html.manifest.display.browser 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.display.fullscreen 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.display.minimal-ui 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.display.standalone 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.display_override 📋 | Edge | 3/4/2021 | 2049 | Chrome: display_override and/or display are required for a web app to be installable.Chrome Android: display_override and/or display are required for a web app to be installable.Edge: display_override and/or display are required for a web app to be installable.Quest Browser: display_override and/or display are required for a web app to be installable.Opera: display_override and/or display are required for a web app to be installable.Opera Android: display_override and/or display are required for a web app to be installable.Samsung Internet: display_override and/or display are required for a web app to be installable. |
| html.manifest.display_override.tabbed 📋 | Edge | 6/13/2024 | 852 | |
| html.manifest.display_override.window-controls-overlay 📋 | Edge | 9/1/2022 | 1503 | |
| html.manifest.file_handlers 📋 | Edge | 5/31/2022 | 1596 | |
| html.manifest.icons 📋 | Edge | 1/15/2020 | 2463 | Chrome: icons is required for a web app to be installable.Chrome Android: icons is required for a web app to be installable.Edge: icons is required for a web app to be installable.Quest Browser: icons is required for a web app to be installable.Opera: icons is required for a web app to be installable.Opera Android: icons is required for a web app to be installable.Safari: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Safari on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified.Samsung Internet: icons is required for a web app to be installable.WebView Android: icons is required for a web app to be installable.WebView on iOS: Only used when no apple-touch-icon is present and either "purpose" is set to "any" or "purpose" is not specified. |
| html.manifest.id 📋 | Edge | 11/19/2021 | 1789 | Firefox: The property parses, but has no effect. |
| html.manifest.launch_handler 📋 | Edge | 2/9/2023 | 1342 | |
| html.manifest.launch_handler.client_mode 📋 | Edge | 2/9/2023 | 1342 | |
| html.manifest.name 📋 | Edge | 1/15/2020 | 2463 | Chrome: name or short_name is required for a web app to be installable.Chrome Android: name or short_name is required for a web app to be installable.Edge: name or short_name is required for a web app to be installable.Quest Browser: name or short_name is required for a web app to be installable.Opera: name or short_name is required for a web app to be installable.Opera Android: name or short_name is required for a web app to be installable.Samsung Internet: name or short_name is required for a web app to be installable.WebView Android: name or short_name is required for a web app to be installable. |
| html.manifest.note_taking 📋 | Edge | 10/21/2021 | 1818 | |
| html.manifest.note_taking.new_note_url 📋 | Edge | 10/21/2021 | 1818 | |
| html.manifest.orientation 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.protocol_handlers 📋 | Edge | 11/19/2021 | 1789 | |
| html.manifest.protocol_handlers.protocol 📋 | Edge | 11/19/2021 | 1789 | |
| html.manifest.protocol_handlers.url 📋 | Edge | 11/19/2021 | 1789 | |
| html.manifest.scope 📋 | Edge | 1/15/2020 | 2463 | |
| html.manifest.serviceworker | Edge | 1/15/2020 | 2463 | |
| html.manifest.serviceworker.scope | Edge | 1/15/2020 | 2463 | |
| html.manifest.serviceworker.src | Edge | 1/15/2020 | 2463 | |
| html.manifest.serviceworker.use_cache | Edge | 1/15/2020 | 2463 | |
| html.manifest.share_target 📋 | Edge | 3/4/2021 | 2049 | Firefox for Android: The property parses, but has no effect. |
| html.manifest.short_name 📋 | Edge | 1/15/2020 | 2463 | Chrome: short_name or name is required for a web app to be installable.Chrome Android: short_name or name is required for a web app to be installable.Edge: short_name or name is required for a web app to be installable.Quest Browser: short_name or name is required for a web app to be installable.Opera: short_name or name is required for a web app to be installable.Opera Android: short_name or name is required for a web app to be installable.Samsung Internet: short_name or name is required for a web app to be installable.WebView Android: short_name or name is required for a web app to be installable. |
| html.manifest.shortcuts 📋 | Edge | 11/19/2021 | 1789 | Chrome: Supported on Windows only.Edge: Supported on Windows only.Opera: Supported on Windows only. |
| html.manifest.start_url 📋 | Edge | 1/15/2020 | 2463 | Chrome: start_url is required for a web app to be installable.Chrome Android: start_url is required for a web app to be installable.Edge: start_url is required for a web app to be installable.Quest Browser: start_url is required for a web app to be installable.Opera: start_url is required for a web app to be installable.Opera Android: start_url is required for a web app to be installable.Samsung Internet: start_url is required for a web app to be installable.WebView Android: start_url is required for a web app to be installable. |
| html.manifest.theme_color 📋 | Edge | 1/15/2020 | 2463 |
| API | First Browser | Date | Days in Limbo | Notes |
|---|---|---|---|---|
| javascript.builtins.Atomics.Atomic_operations_on_non_shared_buffers | Firefox | 7/28/2020 | 2268 | |
| javascript.builtins.Atomics.pause 📋 | Edge | 2/6/2025 | 614 | |
| javascript.builtins.Atomics.waitAsync 📋 | Edge | 11/19/2020 | 2154 | |
| javascript.builtins.DataView.getFloat16 📋 | Firefox | 8/6/2024 | 798 | |
| javascript.builtins.DataView.setFloat16 📋 | Firefox | 8/6/2024 | 798 | |
| javascript.builtins.Error.Error.fileName_parameter | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.Error.Error.lineNumber_parameter | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.Error.columnNumber | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.Error.fileName | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.Error.lineNumber | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.FinalizationRegistry.symbol_as_target | Edge | 1/12/2023 | 1370 | |
| javascript.builtins.Float16Array 📋 | Firefox | 8/6/2024 | 798 | |
| javascript.builtins.Float16Array.Float16Array 📋 | Firefox | 8/6/2024 | 798 | |
| javascript.builtins.Function.displayName | Firefox | 6/5/2012 | 5243 | |
| javascript.builtins.InternalError | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.InternalError.InternalError | Firefox | 11/9/2004 | 8008 | |
| javascript.builtins.Intl.DurationFormat 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.DurationFormat.DurationFormat 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.DurationFormat.format 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.DurationFormat.formatToParts 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.DurationFormat.resolvedOptions 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.DurationFormat.supportedLocalesOf 📋 | Edge | 9/19/2024 | 754 | |
| javascript.builtins.Intl.Locale.getCalendars 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getCollations 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getHourCycles 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getNumberingSystems 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getTextInfo 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Deno: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getTimeZones 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.Locale.getWeekInfo 📋 | Edge | 10/17/2024 | 726 | Chrome: Implemented as an accessor property.Chrome Android: Implemented as an accessor property.Edge: Implemented as an accessor property.Node.js: Implemented as an accessor property.Quest Browser: Implemented as an accessor property.Opera: Implemented as an accessor property.Opera Android: Implemented as an accessor property.Safari: Implemented as an accessor property.Safari on iOS: Implemented as an accessor property.Samsung Internet: Implemented as an accessor property.WebView Android: Implemented as an accessor property.WebView on iOS: Implemented as an accessor property. |
| javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_roundingIncrement_parameter | Firefox | 8/1/2023 | 1169 | |
| javascript.builtins.Intl.PluralRules.PluralRules.options_parameter.options_trailingZeroDisplay_parameter | Firefox | 8/1/2023 | 1169 | |
| javascript.builtins.Math.f16round 📋 | Firefox | 8/6/2024 | 798 | |
| javascript.builtins.Promise.incumbent_settings_object_tracking 📋 | Firefox | 11/15/2016 | 3619 | |
| javascript.builtins.RegExp.escape 📋 | Firefox | 1/7/2025 | 644 | |
| javascript.builtins.Uint8Array.fromBase64 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.Uint8Array.fromHex 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.Uint8Array.setFromBase64 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.Uint8Array.setFromHex 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.Uint8Array.toBase64 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.Uint8Array.toHex 📋 | Firefox | 11/26/2024 | 686 | |
| javascript.builtins.WeakMap.symbol_as_keys | Edge | 1/12/2023 | 1370 | |
| javascript.builtins.WeakRef.symbol_as_target | Edge | 1/12/2023 | 1370 | |
| javascript.builtins.WeakSet.symbol_as_keys | Edge | 1/12/2023 | 1370 | |
| javascript.grammar.trailing_commas.trailing_commas_in_dynamic_import | Edge | 5/27/2021 | 1965 | 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 | Edge | 5/27/2021 | 1965 | 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 📋 | Edge | 3/22/2024 | 935 | |
| javascript.statements.import.import_attributes.type_css | Edge | 3/22/2024 | 935 | |
| javascript.statements.import.import_attributes.type_json | Edge | 3/22/2024 | 935 | |
| javascript.statements.import.service_worker_support | Edge | 5/27/2021 | 1965 | |
| javascript.statements.import.worklet_support | Firefox | 6/6/2023 | 1225 |