These features are not yet available across all browsers.

Consider the browser support data below as well as your users' browser versions before using these features in production. Provide your essential content and functionality to as many users as possible by using progressive enhancements.

• background-clip: border-area

  Limited availability

  The background-clip: border-area CSS declaration draws the background underneath only the border of an element.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

  Baseline availability blocked since July 2026 by Firefox (0 months)

• light-dark() image values

  Limited availability

  The light-dark() CSS function accepts, in addition to colors, two <image> values, such as a gradient or URL, and uses one depending on the current color scheme.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2026 by Safari (0 months)

• Lazy-loading media

  Limited availability

  The loading="lazy" attribute for <video> and <audio> elements defers loading the media resource until the element is near the viewport. This matches the lazy-loading behavior for <img> and <iframe> elements.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• text-fit

  Limited availability

  The text-fit CSS property scales text to fill the inline size of its container. You can use this to grow or shrink headlines, captions, or pull quotes to fit a container.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• cross-origin() for url()

  Limited availability

  The url() CSS function accepts a cross-origin() modifier to control cross-origin resource sharing (CORS) when requesting the URL. For example, url("https://example.com" cross-origin(anonymous))) does not send credentials to the URL.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

  Baseline availability blocked since July 2026 by Firefox (0 months)

• integrity() for url()

  Limited availability

  The url() CSS function accepts an integrity() modifier to use subresource integrity to verify the response from the requested URL.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• referrer-policy() for url()

  Limited availability

  The url() CSS function accepts a referrer-policy() modifier to choose which referrer to send when requesting the URL. For example, `url("https://example.com" referrer-policy(no-referrer)) does not send a referrer to the URL.

  Learn more

  • Chrome 150 Released on 2026-06-30
  • Chrome Android 150 Released on 2026-06-30
  • Edge 150 Released on 2026-07-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

  Baseline availability blocked since July 2026 by Firefox (0 months)

• Web app origin migration

  Limited availability

  The migrate_to and migrate_from web app manifest members move an installed app from one origin to another, within the same site. They preserve the user's installation settings on the device, like shortcuts.

  Learn more

  • Chrome 149 Released on 2026-06-02
  • Chrome Android Not supported
  • Edge 149 Released on 2026-06-04
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Gap decorations

  Limited availability

  The column-rule and row-rule CSS properties display decorative lines between columns and rows of a flex, grid, or multi-column layout. The rule-break, rule-outset, and rule-paint-order properties control the appearance of these lines.

  Learn more

  • Chrome 149 Released on 2026-06-02
  • Chrome Android 149 Released on 2026-06-02
  • Edge 149 Released on 2026-06-04
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Anchor positioning

  Limited availability

  Anchor positioning places an element based on the position of another element. For example, you can place a tooltip next to the content it references.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android 151 Released on 2026-05-19
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Document picture-in-picture

  Limited availability

  The document picture-in-picture API creates an always-on-top window from arbitrary HTML content.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android Not supported
  • Edge 130 Released on 2024-10-17
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Web serial

  Limited availability

  The navigator.serial API communicates with devices over serial ports, such as microcontrollers.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android Not supported
  • Edge 89 Released on 2021-03-04
  • Firefox 151 Released on 2026-05-19
  • Firefox for Android Not supported Position: neutral
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• Hanging punctuation

  Limited availability

  The hanging-punctuation CSS property puts punctuation characters outside of the box to align the text with the rest of the document.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11

• Origin

  Limited availability

  An Origin object represents an origin, as in a scheme, hostname, and port. You can use it to make same-site and same-origin comparisons.

  Learn more

  • Chrome 145 Released on 2026-02-10
  • Chrome Android 145 Released on 2026-02-10
  • Edge 145 Released on 2026-02-14
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26.5 Released on 2026-05-11
  • Safari on iOS 26.5 Released on 2026-05-11

  Baseline availability blocked since May 2026 by Firefox (2 months)

• Language detector

  Limited availability

  The LanguageDetector API identifies the likely natural language that some text is written in. You can use this API to supplement machine translation when the source source language is not known.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android Not supported
  • Edge 148 Released on 2026-05-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• at-rule()

  Limited availability

  The at-rule() function, when used with @supports, checks if a CSS at-rule is supported. For example @supports at-rule(@starting-style) checks if the @starting-style at-rule is supported.

  Learn more

  • Chrome 148 Released on 2026-05-05
  • Chrome Android 148 Released on 2026-05-05
  • Edge 148 Released on 2026-05-07
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Translator

  Limited availability

  The Translator API translates some text from one natural language to another, using machine translation.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android Not supported
  • Edge 148 Released on 2026-05-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• LanguageModel

  Limited availability

  The LanguageModel API prompts an on-device language model. Also known as the Prompt API.

  Learn more

  • Chrome 148 Released on 2026-05-05
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• ariaNotify()

  Limited availability

  The ariaNotify() method of Element and Document requests assistive technology software, if activated, to announce a message to the user. This can help make dynamic content changes more accessible to users.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• color-mix() with three or more colors

  Limited availability

  The color-mix() CSS function accepts three or more colors.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported
  • Safari on iOS Not supported

• Custom highlights from point

  Limited availability

  The CSS.highlights.highlightsFromPoint() method returns an array of Highlight objects at a specified point.

  Learn more

  • Chrome 140 Released on 2025-09-02
  • Chrome Android 140 Released on 2025-09-02
  • Edge 140 Released on 2025-09-05
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2026 by Safari (3 months)

• Media element pseudo-classes

  Limited availability

  The :playing, :paused, :seeking, :buffering, :stalled, :muted, and :volume-locked CSS pseudo-classes match <audio> and <video> elements based on their state.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

  Baseline availability blocked since April 2026 by Chromium (3 months)

• overscroll-behavior

  Limited availability

  The overscroll-behavior CSS property disables default scrolling behaviors when the edges of a scrolling area are reached.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2026 by Safari (3 months)

• <img sizes="auto" loading="lazy">

  Limited availability

  The sizes="auto" attribute for the <img> HTML element sets the layout size for the image based on the computed layout size when choosing a source from the srcset. This attribute only applies to images with the loading="lazy" attribute.

  Learn more

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2026 by Safari (3 months)

• border-shape

  Limited availability

  The border-shape CSS property sets the geometry of the border box, changing the shape of any applicable border, border image, focus outline, or shadow.

  Learn more

  • Chrome 147 Released on 2026-04-07
  • Chrome Android 147 Released on 2026-04-07
  • Edge 147 Released on 2026-04-10
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Element-scoped view transitions

  Limited availability

  The startViewTransition() method of an Element object starts a view transition that affects only that element's DOM tree. You can use this to run separate elements' transitions concurrently.

  Learn more

  • Chrome 147 Released on 2026-04-07
  • Chrome Android 147 Released on 2026-04-07
  • Edge 147 Released on 2026-04-10
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Layers (WebXR)

  Limited availability

  WebXR layer types, such as XRCylinderLayer, XRCylinderLayer, XREquirectLayer, XRProjectionLayer or XRQuadLayer, are managed by the system compositor, to reduce latency or resampling.

  Learn more

  • Chrome 147 Released on 2026-04-07
  • Chrome Android 147 Released on 2026-04-07
  • Edge 147 Released on 2026-04-10
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• captureStream() for <audio> and <video>

  Limited availability

  The captureStream() method for <audio> and <video> elements returns a MediaStream for the media element's content. You can use this to record media or send it elsewhere, such as a canvas or WebRTC connection.

  Learn more

  • Chrome 62 Released on 2017-10-17
  • Chrome Android 62 Released on 2017-10-24
  • Edge 79 Released on 2020-01-15
  • Firefox 149 Released on 2026-03-24
  • Firefox for Android 149 Released on 2026-03-24
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since March 2026 by Safari (4 months)

• CloseWatcher

  Limited availability

  The CloseWatcher API listens and responds to close requests on in-page components, such as modals, popovers, and sidebars.

  Learn more

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox 149 Released on 2026-03-24
  • Firefox for Android 149 Released on 2026-03-24
  • Safari Not supported Position: neutral
  • Safari on iOS Not supported Position: neutral

  Baseline availability blocked since March 2026 by Safari (4 months)

• popover="hint"

  Limited availability

  The popover="hint" global HTML attribute creates a popover that is subordinate to popovers with a popover="auto" attribute. You can use this to create tooltips that don't dismiss auto popovers.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox 149 Released on 2026-03-24
  • Firefox for Android 149 Released on 2026-03-24
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since March 2026 by Safari (4 months)

• Crash reporting

  Limited availability

  Crash reporting sends a report to a URL nominated by the Reporting-Endpoints header when a user is unable to continue using the page because the browser or tab crashed.

  Learn more

  • Chrome 96 Released on 2021-11-15
  • Chrome Android 96 Released on 2021-11-15
  • Edge 96 Released on 2021-11-19
  • Firefox 149 Released on 2026-03-24
  • Firefox for Android 149 Released on 2026-03-24
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since March 2026 by Safari (4 months)

• <meta name="text-scale">

  Limited availability

  The <meta name="text-scale" content="scale" /> HTML element allows the browser's initial font size to be affected by the operating system text scale settings. The <meta name="text-scale" content="legacy" /> element is the default behavior that respects only browser font-size settings.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Navigation precommit handlers

  Limited availability

  The precommitHandler callback option to NavigateEvent's intercept() method returns a promise that defers navigation until the promise resolves. You can use this to change the navigation's URL, state, and history before navigation occurs.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox 148 Released on 2026-02-24
  • Firefox for Android 148 Released on 2026-02-24
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since March 2026 by Safari (4 months)

• Scoped custom element registries

  Limited availability

  The CustomElementRegistry() constructor creates a new custom element registry that's separate from the global window.customElements registry. Creating more than one registry is useful for multiple custom elements that have the same tag name to coexist.

  Learn more

  • Chrome 146 Released on 2026-03-10
  • Chrome Android 146 Released on 2026-03-10
  • Edge 146 Released on 2026-03-13
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since March 2026 by Firefox (4 months)

• hidden="until-found"

  Limited availability

  The hidden="until-found" attribute hides an element until it is found using the browser's find-in-page search or it is directly navigated to by following a URL fragment.

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android 102 Released on 2022-05-24
  • Edge 102 Released on 2022-05-31
  • Firefox 148 Released on 2026-02-24
  • Firefox for Android 148 Released on 2026-02-24
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since February 2026 by Safari (5 months)

• overflow-clip-margin

  Limited availability

  The overflow-clip-margin CSS property sets how far overflow content may appear outside the bounds of an element before it's clipped by effects such as overflow: clip.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 148 Released on 2026-02-24
  • Firefox for Android 148 Released on 2026-02-24
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Sanitizer API

  Limited availability

  The Document.parseHTML() static method and the setHTML() method of Element and ShadowRoot objects parse and insert HTML into the DOM in a way that can prevent cross-site scripting attacks. The Sanitizer API can customize the sanitization process.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 148 Released on 2026-02-24
  • Firefox for Android 148 Released on 2026-02-24
  • Safari Not supported
  • Safari on iOS Not supported

• Navigation timing confidence

  Limited availability

  The confidence property of a navigation timing entry describes whether the navigation metric is likely to be representative the page's performance (high confidence) or affected by transient conditions, such as browser startup (low confidence).

  Learn more

  • Chrome 145 Released on 2026-02-10
  • Chrome Android 145 Released on 2026-02-10
  • Edge 145 Released on 2026-02-14
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Crash report storage

  Limited availability

  The window.crashReport object is a key-value store to record information about your application's state. If there's a crash, then the data in the key-value store is sent to your crash reporting endpoint, to help you pinpoint the cause of the crash.

  Learn more

  • Chrome 145 Released on 2026-02-10
  • Chrome Android 145 Released on 2026-02-10
  • Edge 145 Released on 2026-02-14
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• text-justify

  Limited availability

  The text-justify CSS property sets the justification method of text when text-align: justify is set.

  Learn more

  • Chrome 145 Released on 2026-02-10
  • Chrome Android 145 Released on 2026-02-10
  • Edge 145 Released on 2026-02-14
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since February 2026 by Safari (5 months)

• Anchor positioning transforms

  Limited availability

  Anchor positioned elements take CSS transforms on their anchor elements into account.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• caret-shape

  Limited availability

  The caret-shape CSS property sets the shape of the insertion caret, the symbol that shows where the next character is to be inserted or deleted.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• clipboardchange

  Limited availability

  The clipboardchange event for navigator.clipboard fires when the user modifies the clipboard's contents.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• <geolocation>

  Limited availability

  The <geolocation> HTML element represents a button that, upon activation, prompts the user to choose whether to grant the page access to geolocation data.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Temporal

  Limited availability

  The Temporal API allows you to work with dates, times, time zones, and durations. It is more powerful than the Date API.

  Learn more

  • Chrome 144 Released on 2026-01-13
  • Chrome Android 144 Released on 2026-01-13
  • Edge 144 Released on 2026-01-21
  • Firefox 139 Released on 2025-05-27
  • Firefox for Android 139 Released on 2025-05-27
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2026 by Safari (6 months)

• CSS import attributes

  Limited availability

  Module import … with { type: "css" } statements load CSS modules as constructable stylesheets. Also known as CSS module scripts.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox 147 Released on 2026-01-13
  • Firefox for Android 147 Released on 2026-01-13
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since January 2026 by Safari (6 months)

• accent-color

  Limited availability

  The accent-color CSS property sets a color for checkboxes, radio buttons, and other form controls.

  Learn more

  • Chrome 93 Released on 2021-08-31
  • Chrome Android Not supported
  • Edge 93 Released on 2021-09-02
  • Firefox 92 Released on 2021-09-07
  • Firefox for Android 92 Released on 2021-09-07
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

  Baseline availability blocked since December 2025 by Chromium (7 months)

• random()

  Limited availability

  The random() CSS function chooses a random numeric value within a specified range. This allows for dynamic, randomized styling using CSS.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

• sibling-count() and sibling-index()

  Limited availability

  The sibling-count() and sibling-index() CSS functions return integers that are useful to style elements based on their positions among siblings or on the number of siblings, for example as part of a calc() expression.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android 138 Released on 2025-06-24
  • Edge 138 Released on 2025-06-26
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

  Baseline availability blocked since December 2025 by Firefox (7 months)

• Relaxed-width SIMD (WebAssembly)

  Limited availability

  Relaxed SIMD (Single Instruction Multiple Data) introduces local non-determinism, where the results of the instructions may vary based on hardware support.

  Learn more

  • Chrome 114 Released on 2023-05-30
  • Chrome Android 114 Released on 2023-05-30
  • Edge 114 Released on 2023-06-02
  • Firefox 146 Released on 2025-12-09
  • Firefox for Android 146 Released on 2025-12-09
  • Safari Not supported Position: neutral
  • Safari on iOS Not supported Position: neutral

  Baseline availability blocked since December 2025 by Safari (7 months)

• Anchor position container queries

  Limited availability

  Anchor position container queries with the @container anchored(fallback: …) at-rule apply styles to an element based on the element's anchor position.

  Learn more

  • Chrome 143 Released on 2025-12-02
  • Chrome Android 143 Released on 2025-12-02
  • Edge 143 Released on 2025-12-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• font-language-override

  Limited availability

  The font-language-override CSS property sets which language-specific glyphs are displayed.

  Learn more

  • Chrome 143 Released on 2025-12-02
  • Chrome Android 143 Released on 2025-12-02
  • Edge 143 Released on 2025-12-05
  • Firefox 34 Released on 2014-12-01
  • Firefox for Android 34 Released on 2014-12-01
  • Safari Not supported Position
  • Safari on iOS Not supported Position

  Baseline availability blocked since December 2025 by Safari (7 months)

• Interest invokers

  Limited availability

  Interest invokers, registered by the interestfor HTML attribute, trigger events and actions on a target element when a user shows interest in the element, through behaviors such as hover, focus, or long-press. Pseudo-elements apply styles to sources and targets of interest.

  Learn more

  • Chrome 142 Released on 2025-10-28
  • Chrome Android 142 Released on 2025-10-28
  • Edge 142 Released on 2025-10-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Local network access

  Limited availability

  The "local-network-access" user permission (and certain actions that imply this permission, such as a fetch() request with { targetAddressSpace: "local" }) allows a site to send requests to servers on a user's local network.

  Learn more

  • Chrome 142 Released on 2025-10-28
  • Chrome Android 142 Released on 2025-10-28
  • Edge 142 Released on 2025-10-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Scroll marker target pseudo-classes

  Limited availability

  The :target-current CSS pseudo-class selects the active scroll marker (as in ::scroll-marker), while the :target-after and :target-before pseudo-classes select the inactive markers preceding and following the active scroll marker.

  Learn more

  • Chrome 142 Released on 2025-10-28
  • Chrome Android 142 Released on 2025-10-28
  • Edge 142 Released on 2025-10-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Range syntax for style queries

  Limited availability

  The @container style() CSS at-rule and if(style()) CSS function queries accept a range syntax, such as >, <, >=, <=, to query for inexact values.

  Learn more

  • Chrome 142 Released on 2025-10-28
  • Chrome Android 142 Released on 2025-10-28
  • Edge 142 Released on 2025-10-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• moveBefore()

  Limited availability

  The moveBefore() DOM method relocates a node while preserving its state. For example, you can move the active element without losing focus, move an animated element without resetting the animation, or move an iframe without reloading its content.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox 144 Released on 2025-10-14
  • Firefox for Android 144 Released on 2025-10-14
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since October 2025 by Safari (9 months)

• Screen orientation lock

  Limited availability

  The screen.orientation.lock() method prevents changes to the screen orientation, typically in fullscreen applications such as games. For example, while locked, rotating a phone to the side won't change the screen orientation from landscape to portrait.

  Learn more

  • Chrome Not supported
  • Chrome Android 38 Released on 2014-10-08
  • Edge Not supported
  • Firefox 144 Released on 2025-10-14
  • Firefox for Android 144 Released on 2025-10-14
  • Safari Not supported
  • Safari on iOS Not supported

• Digital credentials

  Limited availability

  The digital credentials API issues and requests digital credentials, such as driver's licenses or ID cards, with the browser or operating system. Digital credentials extend the navigator.credentials credential management API.

  Learn more

  • Chrome 141 Released on 2025-09-30
  • Chrome Android 141 Released on 2025-09-30
  • Edge 141 Released on 2025-10-03
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since October 2025 by Firefox (9 months)

• IndexedDB getAllRecords()

  Limited availability

  The getAllRecords() method of IDBObjectStore and IDBIndex return records and their primary keys from an IndexedDB store or index. The records can be read in batches and in reverse order. The getAllRecords() methods speed up read operations on large datasets.

  Learn more

  • Chrome 141 Released on 2025-09-30
  • Chrome Android 141 Released on 2025-09-30
  • Edge 141 Released on 2025-10-03
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Signature-based resource integrity

  Limited availability

  Signature-based resource integrity verifies a script's provenance by checking that the resource has been signed with a trusted key given by the <script> element's integrity attribute.

  Learn more

  • Chrome 141 Released on 2025-09-30
  • Chrome Android 141 Released on 2025-09-30
  • Edge 141 Released on 2025-10-03
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• progress()

  Limited availability

  The progress() CSS function returns a ratio for the relative position of one value between two other values, clamped between 0 and 1. You can use it to interpolate a value for other calculations.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android 138 Released on 2025-06-24
  • Edge 138 Released on 2025-06-26
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since September 2025 by Firefox (10 months)

• Scroll-driven animations

  Limited availability

  The animation-timeline, scroll-timeline, and view-timeline CSS properties advance animations based on the user's scroll position.

  Learn more

  • Chrome 115 Released on 2023-07-18
  • Chrome Android 115 Released on 2023-07-21
  • Edge 115 Released on 2023-07-21
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since September 2025 by Firefox (10 months)

• text-wrap: pretty

  Limited availability

  The text-wrap: pretty CSS declaration prioritizes better layout over speed when text is broken into multiple lines.

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since September 2025 by Firefox (10 months)

• Web authentication signal methods

  Limited availability

  The signalUnknownCredential(), signalAllAcceptedCredentials(), and signalCurrentUserDetails() methods of PublicKeyCredential inform authenticators of the state of public key credentials, so that incorrect or revoked credentials may be updated, removed, or hidden.

  Learn more

  • Chrome 132 Released on 2025-01-14
  • Chrome Android 132 Released on 2025-01-14
  • Edge 132 Released on 2025-01-17
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since September 2025 by Firefox (10 months)

• WebCodecs

  Limited availability

  The WebCodecs API provides low-level access to individual video frames and chunks of audio samples, for full control over the way media is processed.

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 94 Released on 2021-09-24
  • Firefox 130 Released on 2024-09-03
  • Firefox for Android Not supported Position: positive
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

  Baseline availability blocked since September 2025 by Firefox (10 months)

• WebGPU

  Limited availability

  The navigator.gpu API performs operations such as rendering and computation on dedicated graphics hardware (also known as a Graphics Processing Unit).

  Learn more

  • Chrome Not supported
  • Chrome Android 121 Released on 2024-01-23
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 26 Released on 2025-09-15
  • Safari on iOS 26 Released on 2025-09-15

• scrollIntoView() container

  Limited availability

  The container option of the scrollIntoView() method sets which ancestor scroll container to scroll. The "nearest" value scrolls only the nearest ancestor, instead of the default "all".

  Learn more

  • Chrome 140 Released on 2025-09-02
  • Chrome Android 140 Released on 2025-09-02
  • Edge 140 Released on 2025-09-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• scroll-target-group

  Limited availability

  The scroll-target-group CSS property sets the container where anchor links act as scroll markers. Using selectors such as :target-current, you can style elements when a target has scrolled into view. It's an alternative to the ::scroll-marker-group pseudo-element, which generates scroll markers.

  Learn more

  • Chrome 140 Released on 2025-09-02
  • Chrome Android 140 Released on 2025-09-02
  • Edge 140 Released on 2025-09-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Scheduler API

  Limited availability

  The scheduler API provides a way to prioritize all tasks belonging to an application.

  Learn more

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox 142 Released on 2025-08-19
  • Firefox for Android 142 Released on 2025-08-19
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since August 2025 by Safari (11 months)

• corner-shape

  Limited availability

  The corner-shape CSS property sets the shape of an element's corners when using border-radius, allowing for shapes other than rounded corners. For example, corner-shape: squircle is a shape in between a square and rounded corner.

  Learn more

  • Chrome 139 Released on 2025-08-05
  • Chrome Android 139 Released on 2025-08-05
  • Edge 139 Released on 2025-08-07
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• @function

  Limited availability

  The @function CSS at-rule defines a custom function that takes CSS values or custom properties as arguments, and returns a CSS value. It can be based on conditional logic such as by using the @media at-rule.

  Learn more

  • Chrome 139 Released on 2025-08-05
  • Chrome Android 139 Released on 2025-08-05
  • Edge 139 Released on 2025-08-07
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Secure payment confirmation

  Limited availability

  The payment extension of a web authentication credential allows a relying party (such as a bank) to create a credential that can be queried by any merchant origin as part of an online checkout that uses the Payment Request API's secure-payment-confirmation payment method. Also known as SPC.

  Learn more

  • Chrome 139 Released on 2025-08-05
  • Chrome Android 139 Released on 2025-08-05
  • Edge 139 Released on 2025-08-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Speech recognition

  Limited availability

  The SpeechRecognition API converts audio into text using the device's speech recognition service.

  Learn more

  • Chrome 139 Released on 2025-08-05
  • Chrome Android 139 Released on 2025-08-05
  • Edge 139 Released on 2025-08-07
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• <dialog closedby>

  Limited availability

  The closedby HTML attribute for <dialog> sets which user actions close a dialog. For example, closedby="any" allows the dialog to be closed by clicking outside of it.

  Learn more

  • Chrome 134 Released on 2025-03-04
  • Chrome Android 134 Released on 2025-03-04
  • Edge 134 Released on 2025-03-06
  • Firefox 141 Released on 2025-07-22
  • Firefox for Android 141 Released on 2025-07-22
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since July 2025 by Safari (12 months)

• Explicit resource management

  Limited availability

  The using and await using declarations and the dispose and asyncDispose symbols manage the lifecycle of resources such as file handles and streams. The DisposableStack and AsyncDisposableStack objects can group, dispose, and coordinate dependencies between multiple disposable resources.

  Learn more

  • Chrome 134 Released on 2025-03-04
  • Chrome Android 134 Released on 2025-03-04
  • Edge 134 Released on 2025-03-06
  • Firefox 141 Released on 2025-07-22
  • Firefox for Android 141 Released on 2025-07-22
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2025 by Safari (12 months)

• font-variant-emoji

  Limited availability

  The font-variant-emoji CSS property sets the default presentation for emoji characters.

  Learn more

  • Chrome 131 Released on 2024-11-12
  • Chrome Android 131 Released on 2024-11-12
  • Edge 131 Released on 2024-11-14
  • Firefox 141 Released on 2025-07-22
  • Firefox for Android 141 Released on 2025-07-22
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2025 by Safari (12 months)

• stretch

  Limited availability

  The stretch CSS keyword expands a box as needed to fit its contents until the maximum size is reached, without preserving the content's preferred aspect ratio.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android 138 Released on 2025-06-24
  • Edge 138 Released on 2025-06-26
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Summarizer

  Limited availability

  The Summarizer API uses an on-device language model to summarize text.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android Not supported
  • Edge 138 Released on 2025-06-26
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Viewport segments

  Limited availability

  The viewport segment CSS environment variables and media features, and the viewport.segments API, allow you to adapt your layout to devices where the display is split, such as on foldable devices.

  Learn more

  • Chrome 138 Released on 2025-06-24
  • Chrome Android 138 Released on 2025-06-24
  • Edge 138 Released on 2025-06-26
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• if()

  Limited availability

  The if() CSS function is an inline conditional value that returns a value based on a set of conditions.

  Learn more

  • Chrome 137 Released on 2025-05-27
  • Chrome Android 137 Released on 2025-05-27
  • Edge 137 Released on 2025-05-29
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• reading-flow

  Limited availability

  The reading-flow CSS property sets the order in which flex or grid elements are rendered to speech or reached via focus navigation. The reading-order property overrides this order.

  Learn more

  • Chrome 137 Released on 2025-05-27
  • Chrome Android 137 Released on 2025-05-27
  • Edge 137 Released on 2025-05-29
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• JavaScript promise integration (WebAssembly)

  Limited availability

  The JavaScript promise integration (JSPI) suspends a WebAssembly module when it calls a JavaScript method that returns a promise. The module resumes when the promise is resolved. You can use this to call asynchronous Web APIs from synchronous WebAssembly.

  Learn more

  • Chrome 137 Released on 2025-05-27
  • Chrome Android Not supported
  • Edge 137 Released on 2025-05-29
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Exception references with exnref (WebAssembly)

  Limited availability

  When caught, an exception is reified into an exception reference, a value of the new type exnref.

  Learn more

  • Chrome 137 Released on 2025-05-27
  • Chrome Android 137 Released on 2025-05-27
  • Edge Not supported
  • Firefox 131 Released on 2024-10-01
  • Firefox for Android 131 Released on 2024-10-01
  • Safari 18.4 Released on 2025-03-31
  • Safari on iOS 18.4 Released on 2025-03-31

  Baseline availability blocked since May 2025 by Chromium (14 months)

• dynamic-range-limit

  Limited availability

  The dynamic-range-limit CSS property controls the peak luminance of high dynamic range content. You can use this to coordinate the apparent brightness of HDR and SDR content.

  Learn more

  • Chrome 136 Released on 2025-04-29
  • Chrome Android 136 Released on 2025-04-29
  • Edge 136 Released on 2025-05-01
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Clearing site data

  Limited availability

  The Clear-Site-Data header deletes browsing data (such as cookies, storage, or cache) associated with the requesting website.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 138 Released on 2025-04-29
  • Firefox for Android 138 Released on 2025-04-29
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

  Baseline availability blocked since April 2025 by Chromium (15 months)

• Error.isError()

  Limited availability

  The Error.isError() static method checks whether a value is an Error object.

  Learn more

  • Chrome 134 Released on 2025-03-04
  • Chrome Android 134 Released on 2025-03-04
  • Edge 134 Released on 2025-03-06
  • Firefox 138 Released on 2025-04-29
  • Firefox for Android 138 Released on 2025-04-29
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2025 by Safari (15 months)

• ::column

  Limited availability

  The ::column CSS pseudo-element represents the individual columns of a multi-column layout container. Columns can only be styled with scroll snap CSS properties and can also have a ::scroll-marker pseudo-element, which scrolls to the column when activated.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Customizable <select>

  Limited availability

  The <select> element's appearance, including the button, selected option, picker dropdown, and options, can be customized using CSS.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• fetchLater

  Limited availability

  The fetchLater() method requests a deferred fetch sent at an unknown time. The browser chooses a reliable time to send the request, ideally when the document is unloaded, and ignores the response. This API is useful for sending beacons to a server without expecting a particular response.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• interactivity

  Limited availability

  The interactivity: inert CSS declaration makes an element and its descendants inert, like when using the inert HTML attribute. Inert elements can't be focused or clicked, their text can't be selected or found using the browser's find-in-page feature.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Observable

  Limited availability

  The when() method on a event target returns an Observable object, which provides a declarative API for subscribing to and operating on events. It's an alternative to addEventListener() callbacks.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Scroll markers

  Limited availability

  A scroll marker scrolls a container to a scroll target. The ::scroll-marker CSS pseudo-element selects a scroll marker in a ::scroll-marker-group pseudo-element, generated before or after the scroll container. You can use them to navigate and style tables of contents, tab panels, and carousels.

  Learn more

  • Chrome 135 Released on 2025-04-01
  • Chrome Android 135 Released on 2025-04-01
  • Edge 135 Released on 2025-04-04
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Hyphenate limit chars

  Limited availability

  The hyphenate-limit-chars CSS property sets the number of characters in a word before it is hyphenated and the minimum number of characters on either side of the hyphen.

  Learn more

  • Chrome 109 Released on 2023-01-10
  • Chrome Android 109 Released on 2023-01-10
  • Edge 109 Released on 2023-01-12
  • Firefox 137 Released on 2025-04-01
  • Firefox for Android 137 Released on 2025-04-01
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2025 by Safari (15 months)

• font-width

  Limited availability

  The font-width CSS property selects a font face from a font family based on width, either by a keyword such as condensed or a percentage.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18.4 Released on 2025-03-31
  • Safari on iOS Not supported

• alpha and colorspace attributes for <input type=color>

  Limited availability

  The ability to control the opacity of a color picked using <input type="color"> and determine the colorspace of the selected color.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 18.4 Released on 2025-03-31
  • Safari on iOS 18.4 Released on 2025-03-31

• Digital goods

  Limited availability

  The window.getDigitalGoodsService API connects to stores or billing services for in-app products and subscriptions.

  Learn more

  • Chrome Not supported
  • Chrome Android 101 Released on 2022-04-26
  • Edge 134 Released on 2025-03-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• <meta name="application-title">

  Limited availability

  The name="application-title" attribute for the <meta> HTML element sets an installed web application's title bar text.

  Learn more

  • Chrome 134 Released on 2025-03-04
  • Chrome Android 134 Released on 2025-03-04
  • Edge 134 Released on 2025-03-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• autocorrect

  Limited availability

  The autocorrect global HTML attribute controls whether to automatically correct spelling or punctuation errors for user input.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 136 Released on 2025-03-04
  • Firefox for Android 136 Released on 2025-03-04
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since March 2025 by Chromium (16 months)

• :has-slotted

  Limited availability

  The :has-slotted CSS pseudo-class matches <slot> elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 136 Released on 2025-03-04
  • Firefox for Android 136 Released on 2025-03-04
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Container scroll-state queries

  Limited availability

  Container scroll-state queries with the @container scroll-state(...) at-rule apply styles to an element based on the sticky positioning, snapped, and scrollable state of the container.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• scroll-initial-target

  Limited availability

  The scroll-initial-target: nearest CSS declaration sets the initial scroll position of its scroll container to the top of the element, much like scrolling to a URL fragment.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• text-box

  Limited availability

  The text-box CSS property sets the spacing above and below text based on a font's typographic features. For example, text-box: trim-both ex alphabetic trims the top to the top of the letter x and the bottom to the bottom of most letters, without descenders.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

  Baseline availability blocked since February 2025 by Firefox (17 months)

• Memory64 (WebAssembly)

  Limited availability

  Instructions accept 64-bit memory indexes.

  Learn more

  • Chrome 133 Released on 2025-02-04
  • Chrome Android 133 Released on 2025-02-04
  • Edge 133 Released on 2025-02-06
  • Firefox 134 Released on 2025-01-07
  • Firefox for Android 134 Released on 2025-01-07
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since February 2025 by Safari (17 months)

• Device posture

  Limited availability

  The device posture API and the device-posture CSS media feature reflect the physical posture of a device, such as whether a foldable device is folded or unfolded.

  Learn more

  • Chrome 132 Released on 2025-01-14
  • Chrome Android 132 Released on 2025-01-14
  • Edge 132 Released on 2025-01-17
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Element capture

  Limited availability

  The restrictTo() method on screen capture media tracks limits capture to a specific element, excluding content which might occlude the element itself, such as video conferencing controls.

  Learn more

  • Chrome 132 Released on 2025-01-14
  • Chrome Android Not supported
  • Edge 132 Released on 2025-01-17
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• File system access

  Limited availability

  The showOpenFilePicker(), showDirectoryPicker(), and showSaveFilePicker() methods request access to files and directories on the user's device and returns a handle for reading and writing to them.

  Learn more

  • Chrome 86 Released on 2020-10-20
  • Chrome Android 132 Released on 2025-01-14
  • Edge 86 Released on 2020-10-09
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• String builtins (WebAssembly)

  Limited availability

  The WebAssembly builtin string functions mirror a subset of the JavaScript String API and adapt it to be efficiently callable without JavaScript glue code.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox 134 Released on 2025-01-07
  • Firefox for Android 134 Released on 2025-01-07
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2025 by Safari (18 months)

• blocking="render"

  Limited availability

  The blocking="render" attribute for <link>, <script>, and <style> elements blocks rendering until the external script or stylesheet has been loaded. For <link rel="expect">, rendering is blocked until a specific element is in the DOM.

  Learn more

  • Chrome 105 Released on 2022-09-02
  • Chrome Android 105 Released on 2022-09-02
  • Edge 105 Released on 2022-09-01
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

  Baseline availability blocked since December 2024 by Firefox (19 months)

• Cross-document view transitions

  Limited availability

  The @view-transition CSS rule sets whether a document opts-in to transitions between documents in a multi-page application. Both the old and new document must opt-in for a transition to be triggered.

  Learn more

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

  Baseline availability blocked since December 2024 by Firefox (19 months)

• ruby-overhang

  Limited availability

  The ruby-overhang CSS property sets whether ruby annotations may overlap adjacent text.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• Hand input

  Limited availability

  An XRHand object, from the hand attribute of an XRInputSource object, represents a WebXR session's fully-articulated hand tracking model.

  Learn more

  • Chrome 131 Released on 2024-11-12
  • Chrome Android 131 Released on 2024-11-12
  • Edge Not supported
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• box-decoration-break

  Limited availability

  The box-decoration-break CSS property sets whether box decorations, such as borders or backgrounds, of an element divided across a page, column, or region wraps each fragment or splits across the break.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox 32 Released on 2014-09-02
  • Firefox for Android 32 Released on 2014-09-02
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since October 2024 by Safari (21 months)

• Compression Dictionary Transport

  Limited availability

  Compression Dictionary Transport is a mechanism for using designated HTTP responses as an external dictionary for future HTTP responses for compression schemes that support using external dictionaries (e.g., Brotli and Zstandard)

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Intl.Locale info

  Limited availability

  The getter methods of the Intl.Locale API provide supplemental information about a Unicode locale, such as the locale's calendar (for example, the first day in a week or the weekend start day), writing direction, 12- or 24-hour cycles, and numbering system.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

  Baseline availability blocked since October 2024 by Firefox (21 months)

• justify-self in block layouts

  Limited availability

  The justify-self CSS property aligns an item along a container's inline axis in block layouts, like it does in grid layouts. Likewise, the justify-items property sets a default justify-self value for all items in a container in a block layout.

  Learn more

  • Chrome 130 Released on 2024-10-15
  • Chrome Android 130 Released on 2024-10-15
  • Edge 130 Released on 2024-10-17
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• calc-size()

  Limited availability

  The calc-size() CSS function computes mathematical expressions that include height and width keyword values, for example calc-size(fit-content, size / 2). Not to be confused with the calc() CSS function, which cannot use keyword values.

  Learn more

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• interpolate-size

  Limited availability

  The interpolate-size CSS property sets whether animations and transitions interpolate between a numeric value and a keyword value, such as from a fixed length to auto or fit-content.

  Learn more

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Scroll snap events

  Limited availability

  The scrollsnapchanging and scrollsnapchange events fire when a scroll gesture changes the selected scroll snap target.

  Learn more

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Virtual pressure sources

  Limited availability

  The CreateVirtualPressureSource WebDriver command creates artificial sources of compute pressure for testing without the need real device sources of compute pressure.

  Learn more

  • Chrome 129 Released on 2024-09-17
  • Chrome Android 129 Released on 2024-09-17
  • Edge 129 Released on 2024-09-19
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• display animation

  Limited availability

  You can animate elements between display: none and any other display value or animate between content-visibility: hidden and any other content-visibility value. This also applies to transitions.

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

  Baseline availability blocked since September 2024 by Firefox (22 months)

• Insertable streams for MediaStreamTrack

  Limited availability

  The MediaStreamTrackProcessor and MediaStreamTrackGenerator APIs modify the contents of a media track for merging streams, applying real-time effects like funny hats, and content overlays.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

• writingsuggestions

  Limited availability

  The writingsuggestions HTML attribute turns on or off a browser's writing suggestions. Writing suggestions vary by browser. For example, if turned on then a browser might show inline text completions accepted by pressing Tab.

  Learn more

  • Chrome 124 Released on 2024-04-16
  • Chrome Android 124 Released on 2024-04-16
  • Edge 124 Released on 2024-04-18
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

  Baseline availability blocked since September 2024 by Firefox (22 months)

• navigator.share()

  Limited availability

  The navigator.share() method invokes the device's native sharing mechanism and passes text, links, files, and other content to share targets. Also known as the Web Share API.

  Learn more

  • Chrome 128 Released on 2024-08-20
  • Chrome Android 61 Released on 2017-09-05
  • Edge 93 Released on 2021-09-02
  • Firefox Not supported Position
  • Firefox for Android 79 Released on 2020-07-28
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

  Baseline availability blocked since August 2024 by Firefox (23 months)

• <fencedframe>

  Limited availability

  The <fencedframe> element embeds another HTML page into the current page in a more secure and privacy-preserving way than <iframe> elements.

  Learn more

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position: blocked
  • Safari on iOS Not supported Position: blocked

• Back/forward cache blocking reasons

  Limited availability

  The notRestoredReasons property of a PerformanceNavigationTiming object explains why the current document was blocked from using the back/forward cache (also known as the bfcache) on navigation.

  Learn more

  • Chrome 125 Released on 2024-05-14
  • Chrome Android 125 Released on 2024-05-14
  • Edge 125 Released on 2024-05-17
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• CPU compute pressure

  Limited availability

  The PressureObserver API monitors CPU load, allowing you to adjust workloads in response to available computing resources. Also known as the Compute Pressure API.

  Learn more

  • Chrome 125 Released on 2024-05-14
  • Chrome Android Not supported
  • Edge 125 Released on 2024-05-17
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• Non-cookie storage access

  Limited availability

  Non-cookie storage access extends the requestStorageAccess() API to let content in cross-site iframes request access to first-party data beyond cookies.

  Learn more

  • Chrome 125 Released on 2024-05-14
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported
  • Safari on iOS Not supported

• Asynchronously iterable streams

  Limited availability

  Asynchronous iteration of a stream allows you to use for await … of loops to iterate through a stream's incoming data.

  Learn more

  • Chrome 124 Released on 2024-04-16
  • Chrome Android 124 Released on 2024-04-16
  • Edge 124 Released on 2024-04-18
  • Firefox 110 Released on 2023-02-14
  • Firefox for Android 110 Released on 2023-02-14
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since April 2024 by Safari (27 months)

• SVG clipboard items

  Limited availability

  The image/svg+xml data type (also known as the MIME type) for ClipboardItem objects represents SVG data written to or read from the clipboard.

  Learn more

  • Chrome 124 Released on 2024-04-16
  • Chrome Android 124 Released on 2024-04-16
  • Edge 124 Released on 2024-04-18
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• context-fill and context-stroke

  Limited availability

  The context-fill and context-stroke CSS values are used with fill and stroke in SVG <marker> or <use> elements to match a color from where they appear.

  Learn more

  • Chrome 124 Released on 2024-04-16
  • Chrome Android 124 Released on 2024-04-16
  • Edge 124 Released on 2024-04-18
  • Firefox 111 Released on 2023-03-14
  • Firefox for Android 111 Released on 2023-03-14
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2024 by Safari (27 months)

• <link rel="expect">

  Limited availability

  The rel="expect" attribute for the <link> HTML element is a hint to the browser to block rendering until the element that the href value references is connected to the document and fully parsed.

  Learn more

  • Chrome 124 Released on 2024-04-16
  • Chrome Android 124 Released on 2024-04-16
  • Edge 124 Released on 2024-04-18
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• contextlost and contextrestored

  Limited availability

  The contextlost event for <canvas> fires when the canvas backing storage is lost, while the contextrestored event fires when it is recreated.

  Learn more

  • Chrome 99 Released on 2022-03-01
  • Chrome Android 99 Released on 2022-03-01
  • Edge 99 Released on 2022-03-03
  • Firefox 125 Released on 2024-04-16
  • Firefox for Android 125 Released on 2024-04-16
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2024 by Safari (27 months)

• Multi-memory (WebAssembly)

  Limited availability

  A single module in WebAssembly can have multiple memories.

  Learn more

  • Chrome 120 Released on 2023-12-05
  • Chrome Android 120 Released on 2023-12-05
  • Edge 120 Released on 2023-12-07
  • Firefox 125 Released on 2024-04-16
  • Firefox for Android 125 Released on 2024-04-16
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since April 2024 by Safari (27 months)

• Long animation frames

  Limited availability

  The long-animation-frame performance event type and the PerformanceLongAnimationFrameTiming API provide information about rendering updates that take longer than 50 milliseconds. Also known as LoAFs.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Service workers static routing

  Limited availability

  The service worker install event's addRoutes method declares resource paths that should either be fetched from the network or the cache, to bypass the service worker and improve performance.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• text-spacing-trim

  Limited availability

  The text-spacing-trim CSS property controls spacing around CJK characters, avoiding excessive whitespace when using full-width punctuation characters.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• Application shortcuts

  Limited availability

  The shortcuts web app manifest member registers common actions of an installed web app with the device. The device can present these actions to the user in contextually appropriate locations, such as jump lists on Windows or the app launcher on Android.

  Learn more

  • Chrome 96 Released on 2021-11-15
  • Chrome Android 84 Released on 2020-07-27
  • Edge 96 Released on 2021-11-19
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS Not supported

• showPicker() for <input>

  Limited availability

  The showPicker() method for <input> elements shows the user interface for picking a value. For example, for <input type="date"> it shows the interface for picking a date.

  Learn more

  • Chrome 99 Released on 2022-03-01
  • Chrome Android 99 Released on 2022-03-01
  • Edge 99 Released on 2022-03-03
  • Firefox 101 Released on 2022-05-31
  • Firefox for Android 101 Released on 2022-05-31
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS Not supported

  Baseline availability blocked since March 2024 by Safari (28 months)

• ::spelling-error and ::grammar-error

  Limited availability

  The ::spelling-error and ::grammar-error CSS pseudo-elements match text that is highlighted as misspelled and grammatically incorrect, respectively.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

  Baseline availability blocked since March 2024 by Firefox (28 months)

• Read unsanitized clipboard data

  Limited availability

  The optional formats.unsanitized parameter of the navigator.clipboard.read() method reads unsanitized text/html data from the system clipboard.

  Learn more

  • Chrome 122 Released on 2024-02-20
  • Chrome Android 122 Released on 2024-02-20
  • Edge 122 Released on 2024-02-23
  • Firefox Not supported Position: neutral
  • Firefox for Android Not supported Position: neutral
  • Safari Not supported
  • Safari on iOS Not supported

• Storage buckets

  Limited availability

  The navigator.storageBuckets API allows you to organize locally stored data into groups called storage buckets. Each bucket can have different settings, allowing the browser to manage and delete buckets independently rather than applying the same treatment to all.

  Learn more

  • Chrome 122 Released on 2024-02-20
  • Chrome Android 122 Released on 2024-02-20
  • Edge 122 Released on 2024-02-23
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• EditContext

  Limited availability

  The EditContext API allows you to build rich text editors that support advanced text input, such as Input Method Editor (IME) composition, an emoji picker, or other platform-specific editing UI.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• font-palette animation

  Limited availability

  You can animate color fonts between two font-palette values.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Remote playback

  Limited availability

  The Remote Playback API initiates and controls playback of media on connected remote devices, such as smart TVs with AirPlay or Chromecast capabilities.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 56 Released on 2017-02-01
  • Edge 121 Released on 2024-01-25
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

  Baseline availability blocked since January 2024 by Firefox (30 months)

• showPicker() for <select>

  Limited availability

  The showPicker() method for <select> elements shows the dropdown menu or other user interface for picking one of the options.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox 122 Released on 2024-01-23
  • Firefox for Android 122 Released on 2024-01-23
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since January 2024 by Safari (30 months)

• Global privacy control

  Limited availability

  The Sec-GPC request header indicates that the user does not consent to a website or service selling or sharing their personal information with third parties.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 120 Released on 2023-11-21
  • Firefox for Android 122 Released on 2024-01-23
  • Safari Not supported
  • Safari on iOS Not supported

• page-orientation

  Limited availability

  The page-orientation CSS property sets the rotation of a page after pagination. This allows pages with the same size declaration to display with different orientations.

  Learn more

  • Chrome 85 Released on 2020-08-25
  • Chrome Android 85 Released on 2020-08-25
  • Edge 85 Released on 2020-08-27
  • Firefox 122 Released on 2024-01-23
  • Firefox for Android 122 Released on 2024-01-23
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2024 by Safari (30 months)

• mask-border

  Limited availability

  The mask-border CSS property sets how the edges of an element are masked. It is a shorthand for mask-border-outset, mask-border-repeat, mask-border-slice, mask-border-source, and mask-border-width.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• background-clip: text

  Limited availability

  The background-clip: text CSS declaration draws the background underneath only the text in the element.

  Learn more

  • Chrome 120 Released on 2023-12-05
  • Chrome Android 120 Released on 2023-12-05
  • Edge 120 Released on 2023-12-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 14 Released on 2020-09-16
  • Safari on iOS 14 Released on 2020-09-16

  Baseline availability blocked since December 2023 by Firefox (31 months)

• Permissions policy violation reporting

  Limited availability

  Permissions policy violation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a page violates a policy. You can also use the Permissions-Policy-Report-Only header to receive reports of what might break under a given policy.

  Learn more

  • Chrome 120 Released on 2023-12-05
  • Chrome Android 120 Released on 2023-12-05
  • Edge 120 Released on 2023-12-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Virtual sensors

  Limited availability

  The CreateVirtualSensor WebDriver command creates a virtual sensor for testing applications that use sensor APIs, without the need for real device sensors.

  Learn more

  • Chrome 120 Released on 2023-12-05
  • Chrome Android 120 Released on 2023-12-05
  • Edge 120 Released on 2023-12-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• prefers-reduced-transparency media query

  Limited availability

  The prefers-reduced-transparency CSS media query sets styles based on whether the user prefers to reduce the amount of transparent effects on their device, for example to improve contrast and legibility.

  Learn more

  • Chrome 119 Released on 2023-10-31
  • Chrome Android 119 Released on 2023-10-31
  • Edge 119 Released on 2023-11-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• word-break: auto-phrase

  Limited availability

  The word-break: auto-phrase CSS declaration specifies that wrapping should occur at natural phrase boundaries, especially in CJK languages.

  Learn more

  • Chrome 119 Released on 2023-10-31
  • Chrome Android 119 Released on 2023-10-31
  • Edge 119 Released on 2023-11-02
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• Managed media source

  Limited availability

  The ManagedMediaSource API is a MediaSource where the browser manages the memory of source buffers and may evict data if needed.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17.1 Released on 2023-10-25

• font-synthesis-position

  Limited availability

  The font-synthesis-position CSS property sets whether or not the browser should synthesize subscript and superscript typefaces when they're missing from the font.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 118 Released on 2023-09-26
  • Firefox for Android 118 Released on 2023-09-26
  • Safari Not supported
  • Safari on iOS Not supported

• Badging

  Limited availability

  The navigator.setAppBadge() method allows installed web applications to display an application badge, typically a dot or number shown alongside the application's icon on the device's home screen or application dock.

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android Not supported
  • Edge 81 Released on 2020-04-13
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 16.4 Released on 2023-03-27

• JPEG XL

  Limited availability

  The JPEG XL image format is a raster graphics file format that supports animation, alpha transparency, and lossy as well as lossless compression.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: neutral
  • Firefox for Android Not supported Position: neutral
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

• Web app manifest

  Limited availability

  A web app manifest file provides metadata about the site. The browser can use the metadata to install the site as a standalone application on the user's device. The metadata usually includes the app's name, icon, description, and ways in which the app wishes to integrate with the device.

  Learn more

  • Chrome 53 Released on 2016-08-31
  • Chrome Android 53 Released on 2016-09-07
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android 79 Released on 2020-07-28
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 15.4 Released on 2022-03-14

  Baseline availability blocked since September 2023 by Firefox (34 months)

• overlay

  Limited availability

  The overlay CSS property, used as an allow-discrete CSS transition, prevents a top layer element, such as a popover or a <dialog>, from being removed from the top layer before it has finished animating. You can't set the value of the overlay property; only use it as transition property.

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• ReadableStream.from()

  Limited availability

  The ReadableStream.from() static method converts an iterable or async iterable object, such as an array or async generator function, into a readable stream.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 117 Released on 2023-08-29
  • Firefox for Android 117 Released on 2023-08-29
  • Safari Not supported
  • Safari on iOS Not supported

• Federated credential management

  Limited availability

  The IdentityCredential API delegates authentication to a third-party identity provider, instead of using third-party cookies. Also known as FedCM.

  Learn more

  • Chrome 116 Released on 2023-08-15
  • Chrome Android 116 Released on 2023-08-15
  • Edge 116 Released on 2023-08-21
  • Firefox Not supported Position: neutral
  • Firefox for Android Not supported Position: neutral
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• display-mode media query

  Limited availability

  The display-mode CSS media query sets styles based on whether the web page is in an ordinary browser tab mode or another mode, such as fullscreen, standalone, or minimal-ui.

  Learn more

  • Chrome 47 Released on 2015-12-01
  • Chrome Android Not supported
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android 116 Released on 2023-08-01
  • Safari Not supported
  • Safari on iOS Not supported

• Page visibility state

  Limited availability

  The visibility-state performance entry and the VisibilityStateEntry API measure the timing of page visibility state changes, such as when a tab is no longer visible or the user has switched to another app.

  Learn more

  • Chrome 115 Released on 2023-07-18
  • Chrome Android 115 Released on 2023-07-21
  • Edge 115 Released on 2023-07-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• baseline-source

  Limited availability

  The baseline-source CSS property controls how inline-level boxes with multiple lines of text are aligned with the surrounding text. By default, which typographic baseline is used depends on the display property value.

  Learn more

  • Chrome 111 Released on 2023-03-07
  • Chrome Android 111 Released on 2023-03-07
  • Edge 111 Released on 2023-03-13
  • Firefox 115 Released on 2023-07-04
  • Firefox for Android 115 Released on 2023-07-04
  • Safari Not supported Position
  • Safari on iOS Not supported Position

  Baseline availability blocked since July 2023 by Safari (36 months)

• Idle detection

  Limited availability

  The IdleDetector API is used to notify a webpage of the user's idle, active, and locked state.

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 114 Released on 2023-06-02
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• Partitioned cookies

  Limited availability

  Partitioned cookies allow you to opt a cookie into partitioned storage, with a separate cookie jar per top-level site. Also known as Cookies Having Independent Partitioned State or CHIPS.

  Learn more

  • Chrome 114 Released on 2023-05-30
  • Chrome Android 114 Released on 2023-05-30
  • Edge 114 Released on 2023-06-02
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Audio session

  Limited availability

  The navigator.audioSession API controls how audio playback interacts with other applications. For example, playing music can pause audio from other applications, while ambient audio can play at the same time.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• CSS typed object model

  Limited availability

  The CSSStyleValue and its subclasses represent CSS values as distinct types instead of only strings. Also known as typed OM.

  Learn more

  • Chrome 66 Released on 2018-04-17
  • Chrome Android 66 Released on 2018-04-17
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

  Baseline availability blocked since March 2023 by Firefox (40 months)

• Fullscreen API

  Limited availability

  The fullscreen API makes a specific element fill the whole screen and hides most browser UI.

  Learn more

  • Chrome 71 Released on 2018-12-04
  • Chrome Android 71 Released on 2018-12-04
  • Edge 79 Released on 2020-01-15
  • Firefox 64 Released on 2018-12-11
  • Firefox for Android 64 Released on 2018-12-11
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS Not supported

  Baseline availability blocked since March 2023 by Safari (40 months)

• Gamepad haptic feedback

  Limited availability

  The gamepad.vibrationActuator property represents a gamepad's haptics hardware, which allows you to control the vibration motors in a gamepad.

  Learn more

  • Chrome 68 Released on 2018-07-24
  • Chrome Android 68 Released on 2018-07-24
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS Not supported

• margin-trim

  Limited availability

  The margin-trim CSS property removes the margins of child elements when they meet the edges of the container.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Numeric factory functions

  Limited availability

  The numeric factory functions, such as CSS.px() or CSS.kHz(), return a CSSUnitValue representing a CSS number value (as in 12px or 440kHz).

  Learn more

  • Chrome 66 Released on 2018-04-17
  • Chrome Android 66 Released on 2018-04-17
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

  Baseline availability blocked since March 2023 by Firefox (40 months)

• iterationComposite

  Limited availability

  The iterationComposite property of a KeyframeEffect object sets whether an animation's iterations are calculated independently ("replace") or are accumulated with the value of the previous iteration ("accumulate").

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 80 Released on 2020-08-25
  • Firefox for Android 80 Released on 2020-08-31
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

  Baseline availability blocked since March 2023 by Chromium (40 months)

• autocapitalize

  Limited availability

  The autocapitalize global HTML attribute sets the virtual keyboard capitalization behavior for user input on an element, such as the first letter of sentences or all words.

  Learn more

  • Chrome 66 Released on 2018-04-17
  • Chrome Android 66 Released on 2018-04-17
  • Edge 79 Released on 2020-01-15
  • Firefox 111 Released on 2023-03-14
  • Firefox for Android 111 Released on 2023-03-14
  • Safari Not supported
  • Safari on iOS 10.3 Released on 2017-03-27

  Baseline availability blocked since March 2023 by Safari (40 months)

• Window management

  Limited availability

  The window.getScreenDetails() method gets information about the screens on a device, which you can use to place new windows on a specific screen with window.open().

  Learn more

  • Chrome 111 Released on 2023-03-07
  • Chrome Android Not supported
  • Edge 111 Released on 2023-03-13
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• <datalist>

  Limited availability

  The <datalist> element sets recommended values for an <input> element. Browsers may show a dropdown menu of all values or match values as the user types.

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 69 Released on 2018-09-04
  • Edge 12 Released on 2015-07-29
  • Firefox 110 Released on 2023-02-14
  • Firefox for Android Not supported
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

  Baseline availability blocked since February 2023 by Firefox (41 months)

• Launch handler

  Limited availability

  The launch_handler web app manifest member, with the client_mode property, configure how web app launches behave when an instance of the app is already open. For example, you can choose to focus the existing app instance instead of launching a new one.

  Learn more

  • Chrome 110 Released on 2023-02-07
  • Chrome Android Not supported
  • Edge 110 Released on 2023-02-09
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• :autofill

  Limited availability

  The :autofill pseudo-class matches <input> elements that have been filled in automatically by the browser.

  Learn more

  • Chrome 110 Released on 2023-02-07
  • Chrome Android 110 Released on 2023-02-07
  • Edge 110 Released on 2023-02-09
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

  Baseline availability blocked since February 2023 by Firefox (41 months)

• Credentialless iframes

  Limited availability

  The credentialless attribute for the <iframe> HTML element loads third-party content in an ephemeral context and does not send any credentials such as cookies. When using cross-origin isolation, this allows you to embed content that does not send Cross-Origin-Embedder-Policy headers.

  Learn more

  • Chrome 110 Released on 2023-02-07
  • Chrome Android 110 Released on 2023-02-07
  • Edge 110 Released on 2023-02-09
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• initial-letter

  Limited availability

  The initial-letter CSS property sets the number of lines the first letter of an element occupies. You can use the property to make a raised capital or drop cap.

  Learn more

  • Chrome 110 Released on 2023-02-07
  • Chrome Android 110 Released on 2023-02-07
  • Edge 110 Released on 2023-02-09
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Speculation rules

  Limited availability

  Speculation rules are hints to the browser to proactively download pages in the background so they appear instantly when the user navigates to them.

  Learn more

  • Chrome 109 Released on 2023-01-10
  • Chrome Android 109 Released on 2023-01-10
  • Edge 109 Released on 2023-01-12
  • Firefox Not supported Position: neutral
  • Firefox for Android Not supported Position: neutral
  • Safari Not supported
  • Safari on iOS Not supported

• Web MIDI

  Limited availability

  The Web MIDI API enables selecting MIDI input and output devices and sending and receiving MIDI messages.

  Learn more

  • Chrome 43 Released on 2015-05-19
  • Chrome Android 43 Released on 2015-05-27
  • Edge 79 Released on 2020-01-15
  • Firefox 108 Released on 2022-12-13
  • Firefox for Android Not supported Position: positive
  • Safari Not supported
  • Safari on iOS Not supported

• Permissions policy

  Limited availability

  The Permissions-Policy response header and the allow attribute for <iframe> elements sets whether a policy-controlled feature, such as an API, may be used in a document.

  Learn more

  • Chrome 108 Released on 2022-11-29
  • Chrome Android 108 Released on 2022-11-29
  • Edge 108 Released on 2022-12-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• COLRv1

  Limited availability

  COLRv1 is a font format that supports multi-color glyphs. COLRv1 extends COLRv0 to support gradients, transforms, and blending modes.

  Learn more

  • Chrome 98 Released on 2022-02-01
  • Chrome Android 98 Released on 2022-02-01
  • Edge 98 Released on 2022-02-03
  • Firefox 107 Released on 2022-11-15
  • Firefox for Android 107 Released on 2022-11-15
  • Safari Not supported Position
  • Safari on iOS Not supported Position

  Baseline availability blocked since November 2022 by Safari (44 months)

• Raw camera access for WebXR

  Limited availability

  The XRView.camera property provides direct access to pose-synchronized camera images within a WebXR session.

  Learn more

  • Chrome 107 Released on 2022-10-25
  • Chrome Android 107 Released on 2022-10-25
  • Edge 107 Released on 2022-10-27
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• WebDriver BiDi

  Limited availability

  WebDriver BiDi is a bidirectional protocol that allows a WebDriver client and a browser to communicate with each other.

  Learn more

  • Chrome 106 Released on 2022-09-27
  • Chrome Android 106 Released on 2022-09-27
  • Edge 106 Released on 2022-10-03
  • Firefox 102 Released on 2022-06-28
  • Firefox for Android 102 Released on 2022-06-28
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

  Baseline availability blocked since October 2022 by Safari (45 months)

• EXT_texture_compression_bptc WebGL extension

  Limited availability

  The EXT_texture_compression_bptc extension for WebGL 1.0 and 2.0 contexts adds the BPTC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

  Learn more

  • Chrome 93 Released on 2021-08-31
  • Chrome Android 92 Released on 2021-07-20
  • Edge 93 Released on 2021-09-02
  • Firefox 68 Released on 2019-07-09
  • Firefox for Android Not supported
  • Safari 16 Released on 2022-09-12
  • Safari on iOS Not supported

• EXT_texture_norm16 WebGL extension

  Limited availability

  The EXT_texture_norm16 extension to WebGL 2.0 contexts adds 16 bit signed normalized and unsigned normalized fixed-point texture, renderbuffer, and texture buffer formats.

  Learn more

  • Chrome 87 Released on 2020-11-17
  • Chrome Android 87 Released on 2020-11-17
  • Edge 87 Released on 2020-11-19
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 16 Released on 2022-09-12
  • Safari on iOS 16 Released on 2022-09-12

  Baseline availability blocked since September 2022 by Firefox (46 months)

• Fetch upload streams

  Limited availability

  The fetch() method and Request() constructor accept a ReadableStream object as the request's body option, to stream upload data to the server.

  Learn more

  • Chrome 105 Released on 2022-09-02
  • Chrome Android 105 Released on 2022-09-02
  • Edge 105 Released on 2022-09-01
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Picture-in-picture (video)

  Limited availability

  The picture-in-picture API allow websites to create a floating, always-on-top video window. Also known as PiP or pop-out video.

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 105 Released on 2022-09-02
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

  Baseline availability blocked since September 2022 by Firefox (46 months)

• text-decoration in ::selection

  Limited availability

  The text-decoration CSS property in a ::selection rule sets the underline and other text decoration styles on the text a user has highlighted.

  Learn more

  • Chrome 105 Released on 2022-09-02
  • Chrome Android 105 Released on 2022-09-02
  • Edge 105 Released on 2022-09-01
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Window Controls Overlay

  Limited availability

  The display_override: ["window-controls-overlay"] web application manifest member shows content in the title bar area of a progressive web app that is installed on a desktop device.

  Learn more

  • Chrome 105 Released on 2022-09-02
  • Chrome Android Not supported
  • Edge 105 Released on 2022-09-01
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• Custom formats for clipboard items

  Limited availability

  The web prefix for ClipboardItem data types (also known as MIME types) allows reading and writing unsanitized custom data from the device clipboard.

  Learn more

  • Chrome 104 Released on 2022-08-02
  • Chrome Android 104 Released on 2022-08-02
  • Edge 104 Released on 2022-08-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• object-view-box

  Limited availability

  The object-view-box CSS property crops and zooms to an inset area of an image.

  Learn more

  • Chrome 104 Released on 2022-08-02
  • Chrome Android 104 Released on 2022-08-02
  • Edge 104 Released on 2022-08-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Region capture

  Limited availability

  When using navigator.mediaDevices.getDisplayMedia() to capture a browser tab as a video stream, the region capture API allows you to crop the video to the bounding box of a given element. In contrast to the element capture API, any content that overlays that element is also captured.

  Learn more

  • Chrome 104 Released on 2022-08-02
  • Chrome Android Not supported
  • Edge 104 Released on 2022-08-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Serializable errors

  Limited availability

  The DOMException, Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError, and URIError objects are serializable. You can call structuredClone() on an error object or pass it to a worker using postMessage().

  Learn more

  • Chrome 77 Released on 2019-09-10
  • Chrome Android 77 Released on 2019-09-10
  • Edge 79 Released on 2020-01-15
  • Firefox 103 Released on 2022-07-26
  • Firefox for Android 103 Released on 2022-07-26
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2022 by Safari (48 months)

• Transferable streams

  Limited availability

  Streams are transferable objects, which can be moved between contexts such as windows and workers.

  Learn more

  • Chrome 87 Released on 2020-11-17
  • Chrome Android 87 Released on 2020-11-17
  • Edge 87 Released on 2020-11-19
  • Firefox 103 Released on 2022-07-26
  • Firefox for Android 103 Released on 2022-07-26
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2022 by Safari (48 months)

• Local fonts

  Limited availability

  The window.queryLocalFonts() method returns an array of locally-installed fonts, each represented by a FontData object.

  Learn more

  • Chrome 103 Released on 2022-06-21
  • Chrome Android Not supported
  • Edge 103 Released on 2022-06-23
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• File handlers

  Limited availability

  The file_handlers web app manifest member registers an installed web app as a handler for files with specific file extensions or MIME types.

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android Not supported
  • Edge 102 Released on 2022-05-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Capture Handle

  Limited availability

  The capture handle API allows you to share a custom handle (a string) from a web application being captured by getDisplayMedia() to the capturing web application.

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android Not supported
  • Edge 102 Released on 2022-05-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Column breaks

  Limited availability

  In columnar layouts (created by the columns or column-count CSS properties), the break-after, break-before, break-inside properties control where columns start or end.

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android 102 Released on 2022-05-24
  • Edge 102 Released on 2022-05-31
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• video-dynamic-range media query

  Limited availability

  The video-dynamic-range CSS media query sets styles based on whether a device can display video with at least standard range colors or at least high range colors. Non-visual devices will match neither.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 100 Released on 2022-05-03
  • Firefox for Android 100 Released on 2022-05-03
  • Safari Not supported
  • Safari on iOS Not supported

• Web NFC

  Limited availability

  The NDEFReader API reads and writes messages to near-field communication (NFC) tags.

  Learn more

  • Chrome Not supported
  • Chrome Android 100 Released on 2022-03-29
  • Edge Not supported
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• background-attachment

  Limited availability

  The background-attachment CSS property sets whether an element's background image or gradient moves as the element scrolls.

  Learn more

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 25 Released on 2013-10-29
  • Firefox for Android 25 Released on 2013-10-29
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS Not supported

  Baseline availability blocked since March 2022 by Safari (52 months)

• Private click measurement

  Limited availability

  The attributionsourceid and attributiondestination attributes for <a> elements measure clicks across websites without associating a click to a specific session. Not to be confused with attribution reporting. Also known as PCM.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• Reversed counter-reset

  Limited availability

  The reversed() CSS function for counter-reset creates a counter that counts down.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 96 Released on 2022-01-11
  • Firefox for Android 96 Released on 2022-01-11
  • Safari Not supported
  • Safari on iOS Not supported

• Device memory

  Limited availability

  The navigator.deviceMemory property is the approximate amount of device memory, in gigabytes.

  Learn more

  • Chrome 97 Released on 2022-01-04
  • Chrome Android 97 Released on 2022-01-04
  • Edge 97 Released on 2022-01-06
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Color management for 2D canvas

  Limited availability

  The optional colorSpace parameter of a 2D canvas's getContext() method chooses the color representation, such as "srgb" or "display-p3".

  Learn more

  • Chrome 92 Released on 2021-07-20
  • Chrome Android 92 Released on 2021-07-20
  • Edge 92 Released on 2021-07-22
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 15.2 Released on 2021-12-13
  • Safari on iOS 15.2 Released on 2021-12-13

  Baseline availability blocked since December 2021 by Firefox (55 months)

• Cursor styles

  Limited availability

  The cursor CSS property styles the pointer, allowing you to provide hints to the user on how to interact with the hovered element.

  Learn more

  • Chrome 68 Released on 2018-07-24
  • Chrome Android 68 Released on 2018-07-24
  • Edge 79 Released on 2020-01-15
  • Firefox 27 Released on 2014-02-04
  • Firefox for Android 95 Released on 2021-12-07
  • Safari 11 Released on 2017-09-19
  • Safari on iOS Not supported

  Baseline availability blocked since December 2021 by Safari (55 months)

• Protocol handlers

  Limited availability

  The protocol_handlers web app manifest member registers an installed web app as a handler for a specific protocol. When a user follows a link with the specified protocol, the installed app opens the link.

  Learn more

  • Chrome 96 Released on 2021-11-15
  • Chrome Android Not supported
  • Edge 96 Released on 2021-11-19
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• Eyedropper

  Limited availability

  The EyeDropper API opens an eyedropper tool, a color picker that allows users to select a color from their screen.

  Learn more

  • Chrome 96 Released on 2021-11-15
  • Chrome Android Not supported
  • Edge 96 Released on 2021-11-19
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• COEP violation reports

  Limited availability

  COEP violation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a page violates its Cross-Origin-Embedder-Policy policy.

  Learn more

  • Chrome 96 Released on 2021-11-15
  • Chrome Android 96 Released on 2021-11-15
  • Edge 96 Released on 2021-11-19
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• image-rendering: smooth

  Limited availability

  The image-rendering: smooth CSS declaration scales images while retaining a gradual color blending that is useful for photos.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 93 Released on 2021-10-05
  • Firefox for Android 93 Released on 2021-10-05
  • Safari Not supported
  • Safari on iOS Not supported

• Profiler

  Limited availability

  The Profiler API records data about the execution of a page, which you can send to a server for later analysis. Also known as self-profiling.

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 94 Released on 2021-09-24
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• Virtual keyboard

  Limited availability

  The navigator.virtualKeyboard API inspects and controls on-screen virtual keyboards. You can use it to programmatically hide or show a virtual keyboard or respond to the keyboard disappearing or appearing.

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 94 Released on 2021-09-24
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Ink

  Limited availability

  The navigator.ink API uses the system compositor to draw to a <canvas> element ahead of pointer events, reducing the delay between moving a stylus or cursor and a pen stroke appearing on screen.

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 93 Released on 2021-09-02
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• Desynchronized 2D canvas

  Limited availability

  The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a 2D canvas independently of the event loop. This can reduce drawing latency.

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android 75 Released on 2019-06-04
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

  Baseline availability blocked since September 2021 by Firefox (58 months)

• EXT_frag_depth WebGL extension

  Limited availability

  The EXT_frag_depth extension for WebGL 1.0 and 2.0 contexts adds setting the depth value of a fragment from within the fragment shader.

  Learn more

  • Chrome 38 Released on 2014-10-07
  • Chrome Android 38 Released on 2014-10-08
  • Edge 93 Released on 2021-09-02
  • Firefox 47 Released on 2016-06-07
  • Firefox for Android Not supported
  • Safari 9 Released on 2015-09-30
  • Safari on iOS 15 Released on 2021-09-20

  Baseline availability blocked since September 2021 by Firefox (58 months)

• Media session

  Limited availability

  The navigator.mediaSession API integrates with platform UI for media playback. It can be used to set metadata such as title and artwork, and to handle user actions like playing, pausing, or seeking.

  Learn more

  • Chrome 73 Released on 2019-03-12
  • Chrome Android 57 Released on 2017-03-16
  • Edge 79 Released on 2020-01-15
  • Firefox 82 Released on 2020-10-20
  • Firefox for Android Not supported Position: positive
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

  Baseline availability blocked since September 2021 by Firefox (58 months)

• <meta name="theme-color">

  Limited availability

  The name="theme-color" attribute for the <meta> HTML element suggests a color that the browser can use to customize the display of the page or the browser user interface.

  Learn more

  • Chrome Not supported
  • Chrome Android 92 Released on 2021-07-20
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• WEBGL_draw_buffers WebGL extension

  Limited availability

  The WEBGL_draw_buffers extension for WebGL 1.0 contexts enables a fragment shader to write to several textures, which is useful for deferred shading, for example.

  Learn more

  • Chrome 36 Released on 2014-07-16
  • Chrome Android Not supported
  • Edge 17 Released on 2018-04-30
  • Firefox 28 Released on 2014-03-18
  • Firefox for Android Not supported
  • Safari 9 Released on 2015-09-30
  • Safari on iOS 15 Released on 2021-09-20

• WEBGL_multi_draw WebGL extension

  Limited availability

  The WEBGL_multi_draw extension for WebGL 1.0 and 2.0 contexts renders more than one primitive with a single function call.

  Learn more

  • Chrome 86 Released on 2020-10-20
  • Chrome Android 86 Released on 2020-10-20
  • Edge 86 Released on 2020-10-09
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

  Baseline availability blocked since September 2021 by Firefox (58 months)

• EXT_shader_texture_lod WebGL extension

  Limited availability

  The EXT_shader_texture_lod extension for WebGL 1.0 and 2.0 contexts adds texture functions to the OpenGL ES Shading Language such that the shader writer explicitly controls the level of detail (LOD).

  Learn more

  • Chrome 38 Released on 2014-10-07
  • Chrome Android 38 Released on 2014-10-08
  • Edge 93 Released on 2021-09-02
  • Firefox 47 Released on 2016-06-07
  • Firefox for Android Not supported
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

  Baseline availability blocked since September 2021 by Firefox (58 months)

• EXT_texture_compression_rgtc WebGL extension

  Limited availability

  The EXT_texture_compression_rgtc extension for WebGL 1.0 and 2.0 contexts adds RGTC compressed texture formats. RGTC is a block-based texture compression format suited for unsigned and signed red and red-green textures. Also known as Red-Green Texture Compression.

  Learn more

  • Chrome 93 Released on 2021-08-31
  • Chrome Android 83 Released on 2020-05-19
  • Edge 93 Released on 2021-09-02
  • Firefox 65 Released on 2019-01-29
  • Firefox for Android Not supported
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS Not supported

• WebOTP

  Limited availability

  The OTPCredential API represents a one-time-password (OTP).

  Learn more

  • Chrome 93 Released on 2021-08-31
  • Chrome Android 84 Released on 2020-07-27
  • Edge 93 Released on 2021-09-02
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• OVR_multiview2 WebGL extension

  Limited availability

  The OVR_multiview2 extension for WebGL 2.0 contexts renders into multiple views simultaneously. This especially useful for virtual reality (VR) and WebXR.

  Learn more

  • Chrome Not supported
  • Chrome Android 93 Released on 2021-08-31
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Fetch metadata request headers

  Limited availability

  The Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site, and Sec-Fetch-User HTTP headers provide extra information about the way a request was made, to help servers reject certain kinds of malicious requests.

  Learn more

  • Chrome 80 Released on 2020-02-04
  • Chrome Android 80 Released on 2020-02-04
  • Edge 80 Released on 2020-02-07
  • Firefox 90 Released on 2021-07-13
  • Firefox for Android 90 Released on 2021-07-13
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2021 by Safari (60 months)

• Font metric overrides

  Limited availability

  The ascent-override, descent-override, and line-gap-override descriptors adjust the display of a font declared in an @font-face statement. This can help make fallback fonts look the same size.

  Learn more

  • Chrome 87 Released on 2020-11-17
  • Chrome Android 87 Released on 2020-11-17
  • Edge 87 Released on 2020-11-19
  • Firefox 89 Released on 2021-06-01
  • Firefox for Android 89 Released on 2021-06-01
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since June 2021 by Safari (61 months)

• Top-level await

  Limited availability

  The await keyword, when used at the top level of a module (outside of an async function), delays parent module execution until after a promise fulfills.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android 89 Released on 2021-03-02
  • Edge 89 Released on 2021-03-04
  • Firefox 89 Released on 2021-06-01
  • Firefox for Android 89 Released on 2021-06-01
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since June 2021 by Safari (61 months)

• Accelerometer

  Limited availability

  The Accelerometer, LinearAccelerationSensor and GravitySensor APIs read the acceleration applied to a device in three dimensions, either including the effect of gravity, without its effect, or only its effect, respectively.

  Learn more

  • Chrome 91 Released on 2021-05-25
  • Chrome Android 91 Released on 2021-05-25
  • Edge 91 Released on 2021-05-27
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• AudioListener

  Limited availability

  An AudioListener object represents the virtual position and orientation of a person relative to sound sources, to spatialize audio in a Web Audio context.

  Learn more

  • Chrome 52 Released on 2016-07-20
  • Chrome Android 52 Released on 2016-07-27
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Firefox (63 months)

• EXT_float_blend WebGL extension

  Limited availability

  The EXT_float_blend extension for WebGL 1.0 and 2.0 contexts adds 32-bit floating-point components to blending and draw buffers.

  Learn more

  • Chrome 75 Released on 2019-06-04
  • Chrome Android 75 Released on 2019-06-04
  • Edge 79 Released on 2020-01-15
  • Firefox 67 Released on 2019-05-21
  • Firefox for Android 67 Released on 2019-05-21
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS Not supported

  Baseline availability blocked since April 2021 by Safari (63 months)

• Fetch form data

  Limited availability

  The Request.formData() and Response.formData() methods read a request or response body and return a FormData promise. You can use it to access the fields of a form submission.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 39 Released on 2015-07-02
  • Firefox for Android 39 Released on 2015-07-02
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Chromium (63 months)

• KHR_parallel_shader_compile WebGL extension

  Limited availability

  The KHR_parallel_shader_compile extension for WebGL 1.0 and 2.0 contexts checks the status of shader compilation without blocking the runtime.

  Learn more

  • Chrome 76 Released on 2019-07-30
  • Chrome Android 76 Released on 2019-07-30
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Firefox (63 months)

• WEBGL_compressed_texture_s3tc_srgb WebGL extension

  Limited availability

  The WEBGL_compressed_texture_s3tc_srgb extension for WebGL 1.0 and 2.0 contexts adds S3TC compressed texture formats for the sRGB colorspace to compressedTexImage2D() and compressedTexSubImage2D().

  Learn more

  • Chrome 60 Released on 2017-07-25
  • Chrome Android 60 Released on 2017-08-01
  • Edge 80 Released on 2020-02-07
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android Not supported
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Firefox (63 months)

• WebVTT cue alignment

  Limited availability

  The WebVTT cue alignment settings control which part of the cue is aligned with the given line and position. Cue alignment is set using line and position settings in WebVTT files or the lineAlign and positionAlign properties of VTTCue using JavaScript.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 31 Released on 2014-07-22
  • Firefox for Android 31 Released on 2014-07-22
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Chromium (63 months)

• WebVTT regions

  Limited availability

  WebVTT regions set the areas of the video where captions or subtitles should be rendered, such as placing roll-up captions used for live captions.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 59 Released on 2018-03-13
  • Firefox for Android 59 Released on 2018-03-13
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

  Baseline availability blocked since April 2021 by Chromium (63 months)

• display: ruby

  Limited availability

  The display: ruby CSS declaration renders an element with the box layout of a <ruby> HTML element. Child elements may use equivalents to <ruby> internal elements such as display: ruby-base for <rb>.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 88 Released on 2021-04-19
  • Firefox for Android 88 Released on 2021-04-19
  • Safari Not supported
  • Safari on iOS Not supported

• User agent client hints

  Limited availability

  The Sec-CH-UA HTTP request header and the navigator.userAgentData API expose browser and platform information used to vary responses and application logic. User agent client hints are similar to user agent strings but more privacy-preserving and safer to parse.

  Learn more

  • Chrome 90 Released on 2021-04-13
  • Chrome Android 90 Released on 2021-04-13
  • Edge 90 Released on 2021-04-15
  • Firefox Not supported Position: neutral
  • Firefox for Android Not supported Position: neutral
  • Safari Not supported Position: blocked
  • Safari on iOS Not supported Position: blocked

• Depth sensing

  Limited availability

  An XRDepthInformation object represents a measurement of the distance from the user's device to the real-world geometry in the user's environment.

  Learn more

  • Chrome 90 Released on 2021-04-13
  • Chrome Android 90 Released on 2021-04-13
  • Edge 90 Released on 2021-04-15
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• Lighting estimation

  Limited availability

  The XRLightProbe and XRLightEstimate objects represent real-world environmental lighting conditions during a WebXR session.

  Learn more

  • Chrome 90 Released on 2021-04-13
  • Chrome Android 90 Released on 2021-04-13
  • Edge 90 Released on 2021-04-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Share targets

  Limited availability

  The share_target web app manifest member registers an installed web app as a handler for shared content. When a user shares content by using the device share dialog, the installed app can be listed as an option for handling the shared content.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android 76 Released on 2019-07-30
  • Edge 89 Released on 2021-03-04
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: neutral
  • Safari on iOS Not supported Position: neutral

• Memory measurement

  Limited availability

  The measureUserAgentSpecificMemory() method estimates the memory usage of a web application including all its iframes and workers.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android 89 Released on 2021-03-02
  • Edge 89 Released on 2021-03-04
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• WebHID

  Limited availability

  The WebHID API provides access to Human Interface Devices (HID) that are connected to the user's device.

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android Not supported
  • Edge 89 Released on 2021-03-04
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• Cookie store

  Limited availability

  The CookieStore API is an asynchronous and promise-based API for managing cookies. It does not rely on document and so is available to service workers as well.

  Learn more

  • Chrome 87 Released on 2020-11-17
  • Chrome Android 87 Released on 2020-11-17
  • Edge 87 Released on 2020-11-19
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• ::marker

  Limited availability

  The ::marker CSS pseudo-element selects list item markers for styling numbers or bullets.

  Learn more

  • Chrome 86 Released on 2020-10-20
  • Chrome Android 86 Released on 2020-10-20
  • Edge 86 Released on 2020-10-09
  • Firefox 80 Released on 2020-08-25
  • Firefox for Android 80 Released on 2020-08-31
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since October 2020 by Safari (69 months)

• Augmented reality

  Limited availability

  The "immersive-ar" value for navigator.xr.requestSession() starts an augmented reality WebXR session that renders content aligned with the visible environment.

  Learn more

  • Chrome 86 Released on 2020-10-20
  • Chrome Android 86 Released on 2020-10-20
  • Edge 86 Released on 2020-10-09
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Related apps

  Limited availability

  The related_applications web app manifest member lists operating system-specific applications that are related to the current web app, such as an Android app that provides similar functionality. The getInstalledRelatedApps() method lists which of those are installed on the current device.

  Learn more

  • Chrome Not supported
  • Chrome Android 84 Released on 2020-07-27
  • Edge 85 Released on 2020-08-27
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Anchors (WebXR)

  Limited availability

  An XRAnchor object keeps track of a pose that is fixed relative to the real world. Anchors build an illusion that the placed objects are really present in the user's environment.

  Learn more

  • Chrome 85 Released on 2020-08-25
  • Chrome Android 85 Released on 2020-08-25
  • Edge 85 Released on 2020-08-27
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• HTML media capture

  Limited availability

  The capture HTML attribute for <input type="file"> elements allows the user to capture media using the device's camera or microphone.

  Learn more

  • Chrome Not supported
  • Chrome Android 25 Released on 2013-02-27
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android 79 Released on 2020-07-28
  • Safari Not supported
  • Safari on iOS 10 Released on 2016-09-13

• user-select

  Limited availability

  The user-select CSS property controls which elements can be selected by the user.

  Learn more

  • Chrome 54 Released on 2016-10-12
  • Chrome Android 54 Released on 2016-10-19
  • Edge 79 Released on 2020-01-15
  • Firefox 69 Released on 2019-09-03
  • Firefox for Android 79 Released on 2020-07-28
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2020 by Safari (72 months)

• SharedArrayBuffer in WebGL

  Limited availability

  SharedArrayBuffer objects can be used in WebGL APIs that previously only worked with ArrayBuffer objects.

  Learn more

  • Chrome 60 Released on 2017-07-25
  • Chrome Android 60 Released on 2017-08-01
  • Edge 79 Released on 2020-01-15
  • Firefox 79 Released on 2020-07-28
  • Firefox for Android 79 Released on 2020-07-28
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2020 by Safari (72 months)

• Content Index

  Limited availability

  The Content Index API allows developers to register their offline enabled content with the browser.

  Learn more

  • Chrome Not supported
  • Chrome Android 84 Released on 2020-07-27
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Layout instability

  Limited availability

  The layout-shift performance entry and LayoutShift API measures the layout stability of web pages based on movements of the elements on the page. They're used to calculate Cumulative Layout Shift (CLS), a common metric for perceived stability.

  Learn more

  • Chrome 84 Released on 2020-07-27
  • Chrome Android 84 Released on 2020-07-27
  • Edge 84 Released on 2020-07-16
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported
  • Safari on iOS Not supported

• DOM overlays for WebXR

  Limited availability

  A DOM overlay shows 2D DOM content as an interactive, transparent layer on top of a WebXR application's WebGL content and camera image.

  Learn more

  • Chrome 83 Released on 2020-05-19
  • Chrome Android 83 Released on 2020-05-19
  • Edge 83 Released on 2020-05-21
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Barcode detector

  Limited availability

  The BarcodeDetector API recognizes various barcode formats in images.

  Learn more

  • Chrome Not supported
  • Chrome Android 83 Released on 2020-05-19
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Hit test

  Limited availability

  The getHitTestResults() method of an XRFrame object helps place objects in an augmented reality session by finding where cast rays intersect with real-world geometry.

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android 81 Released on 2020-04-07
  • Edge 81 Released on 2020-04-13
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• Desynchronized WebGL canvas

  Limited availability

  The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a WebGL canvas independently of the event loop. This can reduce drawing latency.

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android 75 Released on 2019-06-04
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Desynchronized WebGL2 canvas

  Limited availability

  The optional desynchronized parameter of a canvas's getContext() method permits the browser to draw a WebGL2 canvas independently of the event loop. This can reduce drawing latency.

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android 75 Released on 2019-06-04
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• UI fonts

  Limited availability

  The ui-serif, ui-sans-serif, ui-monospace and ui-rounded values for the font-family CSS property use device-default user interface fonts for text.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• Periodic background sync

  Limited availability

  The periodic background synchronization API fires a recurring periodicsync event in a service worker. You can use this to update data in the background at regular intervals.

  Learn more

  • Chrome 80 Released on 2020-02-04
  • Chrome Android 80 Released on 2020-02-04
  • Edge 80 Released on 2020-02-07
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Contact picker

  Limited availability

  The navigator.contacts API allows you to ask users to share limited details about entries in their contact list with your application.

  Learn more

  • Chrome Not supported
  • Chrome Android 80 Released on 2020-02-04
  • Edge Not supported
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• alignment-baseline

  Limited availability

  The alignment-baseline CSS property sets which baseline of an element is aligned with the corresponding baseline of its parent.

  Learn more

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 5.1 Released on 2011-07-20
  • Safari on iOS 5 Released on 2011-10-12

  Baseline availability blocked since January 2020 by Firefox (78 months)

• Background fetch

  Limited availability

  Background fetch downloads data in the background even when the web page is closed.

  Learn more

  • Chrome 74 Released on 2019-04-23
  • Chrome Android 74 Released on 2019-04-24
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Background sync

  Limited availability

  The background synchronization API registers a service worker callback to run only when the device is no longer offline. You can use this to let users continue using your app while offline and synchronize with a server after reconnecting.

  Learn more

  • Chrome 49 Released on 2016-03-02
  • Chrome Android 49 Released on 2016-03-09
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• Battery status

  Limited availability

  The navigator.getBattery() API obtains information about the device's battery, including charge level and status. Also known as the Battery API.

  Learn more

  • Chrome 38 Released on 2014-10-07
  • Chrome Android 38 Released on 2014-10-08
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• beforeinstallprompt

  Limited availability

  The beforeinstallprompt event fires when a Progressive Web App (PWA) is installable. You can cancel the event and later call event.prompt() to control when the installation prompt is shown. The appinstalled event fires when the PWA is successfully installed.

  Learn more

  • Chrome 76 Released on 2019-07-30
  • Chrome Android 76 Released on 2019-07-30
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• 2D canvas opacity

  Limited availability

  The optional alpha parameter of a 2D canvas's getContext() method sets whether the canvas has an alpha transparency channel. If set to false, then this permits the browser to optimize compositing for an opaque canvas.

  Learn more

  • Chrome 32 Released on 2014-01-14
  • Chrome Android 32 Released on 2014-01-15
  • Edge 79 Released on 2020-01-15
  • Firefox 30 Released on 2014-06-10
  • Firefox for Android 30 Released on 2014-06-10
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2020 by Safari (78 months)

• controlslist

  Limited availability

  The controlslist attribute for <audio> or <video> hides parts of the browser's built-in controls. For example, controlslist="nofullscreen" removes the button to play the video in fullscreen.

  Learn more

  • Chrome 58 Released on 2017-04-19
  • Chrome Android 58 Released on 2017-04-25
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• Customized built-in elements

  Limited availability

  Customized built-in elements are HTML elements that extend built-in elements using the is attribute, to add new behaviors that you define.

  Learn more

  • Chrome 67 Released on 2018-05-29
  • Chrome Android 67 Released on 2018-05-31
  • Edge 79 Released on 2020-01-15
  • Firefox 63 Released on 2018-10-23
  • Firefox for Android 63 Released on 2018-10-23
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

  Baseline availability blocked since January 2020 by Safari (78 months)

• Element timing

  Limited availability

  The element performance entry and the PerformanceElementTiming API measures the time to render elements that have the elementtiming attribute.

  Learn more

  • Chrome 77 Released on 2019-09-10
  • Chrome Android 77 Released on 2019-09-10
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Federated credentials

  Limited availability

  The FederatedCredential API represents the details required to authenticate a user using a third-party identity provider. Not to be confused with federated credential management (FedCM).

  Learn more

  • Chrome 51 Released on 2016-05-25
  • Chrome Android 51 Released on 2016-06-08
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Gyroscope

  Limited availability

  The Gyroscope API reads the angular velocity of a device in three dimensions.

  Learn more

  • Chrome 67 Released on 2018-05-29
  • Chrome Android 67 Released on 2018-05-31
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• Intersection observer visibility tracking

  Limited availability

  The trackVisibility parameter for the IntersectionObserver constructor enables tracking the visibility of an element, to detect if it may be obscured by other content or visual effects. Also known as IntersectionObserver v2.

  Learn more

  • Chrome 74 Released on 2019-04-23
  • Chrome Android 74 Released on 2019-04-24
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Keyboard lock

  Limited availability

  The navigator.keyboard.lock() API allows you to capture keys that are normally reserved by the operating system. It can be used to provide an immersive fullscreen experience such as games.

  Learn more

  • Chrome 68 Released on 2018-07-24
  • Chrome Android 68 Released on 2018-07-24
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Keyboard map

  Limited availability

  The navigator.keyboard.getLayoutMap() API returns a map from key codes to human readable key names. It can be used to describe buttons to the user when using the keyboard as a set of buttons, such as in games.

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 69 Released on 2018-09-04
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• Long tasks

  Limited availability

  The longtask performance event type and the PerformanceLongTaskTiming API provides information about tasks that occupy the UI thread for 50 milliseconds or more, a metric for input latency, delayed animations, and other sources of "jank."

  Learn more

  • Chrome 58 Released on 2017-04-19
  • Chrome Android 58 Released on 2017-04-25
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Orientation Sensor

  Limited availability

  The AbsoluteOrientationSensor and RelativeOrientationSensor APIs describe the physical orientation of a device in three-dimensional space, either in relation to the Earth's coordinate system or in relation to the device's own orientation, respectively.

  Learn more

  • Chrome 67 Released on 2018-05-29
  • Chrome Android 67 Released on 2018-05-31
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• overflow-anchor

  Limited availability

  The overflow-anchor CSS property sets an element as a possible scroll anchor, reducing unintended scrolling when document changes occur above the current scrollport. This is enabled by default where supported.

  Learn more

  • Chrome 56 Released on 2017-01-25
  • Chrome Android 56 Released on 2017-02-01
  • Edge 79 Released on 2020-01-15
  • Firefox 66 Released on 2019-03-19
  • Firefox for Android 66 Released on 2019-03-19
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2020 by Safari (78 months)

• Page lifecycle

  Limited availability

  The page lifecycle API helps you safely handle page suspensions or discards from memory. The freeze and resume events fire when the browser suspends or resumes a page from memory while the document.wasDiscarded property reports whether the page was reloaded after being dropped.

  Learn more

  • Chrome 68 Released on 2018-07-24
  • Chrome Android 68 Released on 2018-07-24
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• paint()

  Limited availability

  The paint() CSS function creates a custom image, drawn using a paint worklet, for an element's background or border.

  Learn more

  • Chrome 65 Released on 2018-03-06
  • Chrome Android 65 Released on 2018-03-06
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported
  • Safari on iOS Not supported

• Password credentials

  Limited availability

  The PasswordCredential API represents a username and password.

  Learn more

  • Chrome 60 Released on 2017-07-25
  • Chrome Android 60 Released on 2017-08-01
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Payment handler

  Limited availability

  The payment handler API registers a web application as a payment handler and responds to payment requests in the browser's user interface, rather than redirecting users to a separate site to complete a payment.

  Learn more

  • Chrome 70 Released on 2018-10-16
  • Chrome Android 70 Released on 2018-10-17
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: defer
  • Firefox for Android Not supported Position: defer
  • Safari Not supported
  • Safari on iOS Not supported

• Presentation API

  Limited availability

  The Presentation API shows or controls content on another display, such as a network-connected TV or projector.

  Learn more

  • Chrome 47 Released on 2015-12-01
  • Chrome Android 47 Released on 2015-12-02
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported
  • Safari on iOS Not supported

• registerProtocolHandler

  Limited availability

  The navigator.registerProtocolHandler() method declares a site's ability to handle an address scheme (also known as a protocol). For example, an email site can register to open mailto: URLs or a VoIP site to open tel: URLs.

  Learn more

  • Chrome 13 Released on 2011-08-02
  • Chrome Android Not supported
  • Edge 79 Released on 2020-01-15
  • Firefox 2 Released on 2006-10-24
  • Firefox for Android 4 Released on 2011-03-29
  • Safari Not supported
  • Safari on iOS Not supported

• Deprecation reports

  Limited availability

  Deprecation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a page uses a deprecated API or other browser feature.

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 69 Released on 2018-09-04
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• requestIdleCallback()

  Limited availability

  The requestIdleCallback() API queues a function that runs in idle browser time, either at the end of a frame or when the user is inactive. Also known as the background tasks API.

  Learn more

  • Chrome 47 Released on 2015-12-01
  • Chrome Android 47 Released on 2015-12-02
  • Edge 79 Released on 2020-01-15
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since January 2020 by Safari (78 months)

• resize (CSS property)

  Limited availability

  The resize CSS property sets whether an element can be resized by the user, and on which axes.

  Learn more

  • Chrome 4 Released on 2010-01-25
  • Chrome Android 18 Released on 2012-06-27
  • Edge 79 Released on 2020-01-15
  • Firefox 5 Released on 2011-06-21
  • Firefox for Android Not supported
  • Safari 4 Released on 2009-06-08
  • Safari on iOS Not supported

• Save-Data

  Limited availability

  Browsers send the Save-Data HTTP request header when the user turns on a data-saving mode. It is a hint to reduce data sent to the browser. Servers should respond with alternative content, such as smaller images and videos, or different markup and styling.

  Learn more

  • Chrome 65 Released on 2018-03-06
  • Chrome Android 65 Released on 2018-03-06
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Screen capture

  Limited availability

  The navigator.mediaDevices.getDisplayMedia() method asks the user to choose a screen or portion of a screen (such as a window) to capture as a media stream.

  Learn more

  • Chrome 72 Released on 2019-01-29
  • Chrome Android Not supported
  • Edge 79 Released on 2020-01-15
  • Firefox 33 Released on 2014-10-14
  • Firefox for Android Not supported
  • Safari 13 Released on 2019-09-19
  • Safari on iOS Not supported

• text-size-adjust

  Limited availability

  The text-size-adjust CSS property disables or modifies the browser's default text size adjustment for small screen sizes.

  Learn more

  • Chrome 54 Released on 2016-10-12
  • Chrome Android 54 Released on 2016-10-19
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Time-relative pseudo-selectors

  Limited availability

  The :past and :future CSS pseudo-classes match prior or upcoming text track cues during media playback.

  Learn more

  • Chrome 23 Released on 2012-11-06
  • Chrome Android 25 Released on 2013-02-27
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

  Baseline availability blocked since January 2020 by Firefox (78 months)

• Vibration

  Limited availability

  The navigator.vibrate() method makes a tactile alert, if the device is equipped with a haptic motor.

  Learn more

  • Chrome 32 Released on 2014-01-14
  • Chrome Android 32 Released on 2014-01-15
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• Web Bluetooth

  Limited availability

  The Web Bluetooth API enables selecting and communicating with nearby Bluetooth devices.

  Learn more

  • Chrome 70 Released on 2018-10-16
  • Chrome Android 56 Released on 2017-02-01
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• WebUSB

  Limited availability

  The WebUSB API exposes USB compatible devices to web pages.

  Learn more

  • Chrome 61 Released on 2017-09-05
  • Chrome Android 61 Released on 2017-09-05
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• WebXR

  Limited availability

  The navigator.xr API represents the browser's virtual reality or augmented reality system. You can use to request a WebXR session.

  Learn more

  • Chrome 79 Released on 2019-12-10
  • Chrome Android 79 Released on 2019-12-17
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position
  • Safari on iOS Not supported Position

• Gamepad (WebXR)

  Limited availability

  The gamepad attribute of an XRInputSource represents an XR input device, such as a motion controller, that reports data from physical inputs (such as buttons, touch pads, and triggers).

  Learn more

  • Chrome 79 Released on 2019-12-10
  • Chrome Android 79 Released on 2019-12-17
  • Edge 79 Released on 2020-01-15
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• <input type="color">

  Limited availability

  The <input type="color"> HTML element shows a color picker from which users can choose a color value.

  Learn more

  • Chrome 20 Released on 2012-06-26
  • Chrome Android 25 Released on 2013-02-27
  • Edge 14 Released on 2016-08-02
  • Firefox 29 Released on 2014-04-29
  • Firefox for Android Not supported
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

  Baseline availability blocked since March 2019 by Firefox (88 months)

• Case-sensitive attribute selector

  Limited availability

  The s identifier in a CSS attribute selector matches attribute values case-sensitively in document languages like HTML where attribute values are case-insensitive.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 66 Released on 2019-03-19
  • Firefox for Android 66 Released on 2019-03-19
  • Safari Not supported
  • Safari on iOS Not supported

• WebDriver

  Limited availability

  The WebDriver protocol allows out-of-process programs to inspect and control browsers to, for example, run tests of web applications. Also known as WebDriver classic.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 66 Released on 2019-03-19
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Gamepad touch buttons

  Limited availability

  The touched property of a GamepadButton object indicates whether a button capable of detecting touch is currently touched.

  Learn more

  • Chrome 73 Released on 2019-03-12
  • Chrome Android 73 Released on 2019-03-12
  • Edge 15 Released on 2017-04-05
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since March 2019 by Safari (88 months)

• ::selection

  Limited availability

  The ::selection CSS pseudo-element selects text a user has highlighted.

  Learn more

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 62 Released on 2018-09-05
  • Firefox for Android 62 Released on 2018-09-05
  • Safari 1.1 Released on 2003-10-24
  • Safari on iOS Not supported

  Baseline availability blocked since September 2018 by Safari (94 months)

• Network Information

  Limited availability

  The navigator.connection API provides information about the network connection a device is using and fires events when the connection type changes.

  Learn more

  • Chrome Not supported
  • Chrome Android 67 Released on 2018-05-31
  • Edge Not supported
  • Firefox Not supported Position: negative
  • Firefox for Android Not supported Position: negative
  • Safari Not supported
  • Safari on iOS Not supported

• ping

  Limited availability

  The ping attribute for <a> elements sets a URL to send a POST request to when the <a> is clicked. This is typically used for outbound link reporting.

  Learn more

  • Chrome 12 Released on 2011-06-07
  • Chrome Android 18 Released on 2012-06-27
  • Edge 17 Released on 2018-04-30
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 6 Released on 2012-07-25
  • Safari on iOS 6 Released on 2012-09-10

  Baseline availability blocked since April 2018 by Firefox (99 months)

• Payment request

  Limited availability

  The PaymentRequest API prompts the user to make a payment through the browser's user interface.

  Learn more

  • Chrome 60 Released on 2017-07-25
  • Chrome Android 53 Released on 2016-09-07
  • Edge 15 Released on 2017-04-05
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 11.1 Released on 2018-04-12
  • Safari on iOS 11.3 Released on 2018-03-29

  Baseline availability blocked since April 2018 by Firefox (99 months)

• speak-as

  Limited availability

  The speak-as CSS property sets how any element's content is spoken. Not to be confused with the speak-as descriptor of @counter-style at-rules.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 11.1 Released on 2018-04-12
  • Safari on iOS 11.3 Released on 2018-03-29

• Early data

  Limited availability

  TLS 1.3 sessions may be resumed more quickly by sending so-called early data to servers before the TLS handshake has finished. Also known as zero round-trip time resumption or 0-RTT.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 58 Released on 2018-01-23
  • Firefox for Android 58 Released on 2018-01-22
  • Safari Not supported
  • Safari on iOS Not supported

• Gamepad VR hands and poses

  Limited availability

  The hand and pose properties of a Gamepad object represent the position in space and the hand that WebVR controllers are held in.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari Not supported Position: support
  • Safari on iOS Not supported Position: support

• Pointer lock

  Limited availability

  Provides access to raw mouse movement by locking the target of mouse events to a single element and hiding the mouse cursor.

  Learn more

  • Chrome 37 Released on 2014-08-26
  • Chrome Android Not supported
  • Edge 13 Released on 2015-11-12
  • Firefox 50 Released on 2016-11-15
  • Firefox for Android 50 Released on 2016-11-15
  • Safari 10.1 Released on 2017-03-27
  • Safari on iOS Not supported

• Touch events

  Limited availability

  Touch events touchstart, touchmove, touchend, and touchcancel fire when users interact with a touch-sensitive surface, such as a screen or drawing tablet. These events are similar to mouse events.

  Learn more

  • Chrome 22 Released on 2012-09-25
  • Chrome Android 25 Released on 2013-02-27
  • Edge 12 Released on 2015-07-29
  • Firefox 52 Released on 2017-03-07
  • Firefox for Android 6 Released on 2011-08-16
  • Safari Not supported
  • Safari on iOS ≤3 Released before 2009-06-17

  Baseline availability blocked since March 2017 by Safari (112 months)

• cross-fade()

  Limited availability

  The cross-fade() CSS function generates an image by mixing two images.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari 10 Released on 2016-09-20
  • Safari on iOS 9.3 Released on 2016-03-21

• inverted-colors media query

  Limited availability

  The inverted-colors CSS media query sets styles based on whether the user has inverted all colors, such as with mobile accessibility settings.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari 9.1 Released on 2016-03-21
  • Safari on iOS 10 Released on 2016-09-13

• Notifications

  Limited availability

  The Notification() constructor shows a message to the user, typically using the notification system of the host operating system.

  Learn more

  • Chrome 20 Released on 2012-06-26
  • Chrome Android Not supported
  • Edge 14 Released on 2016-08-02
  • Firefox 22 Released on 2013-06-25
  • Firefox for Android 22 Released on 2013-06-25
  • Safari 7 Released on 2013-10-22
  • Safari on iOS Not supported

• OES_texture_half_float_linear WebGL extension

  Limited availability

  The OES_texture_half_float_linear extension for WebGL 1.0 contexts adds linear filtering with half floating-point pixel types for textures.

  Learn more

  • Chrome 29 Released on 2013-08-20
  • Chrome Android 29 Released on 2013-08-21
  • Edge 14 Released on 2016-08-02
  • Firefox 30 Released on 2014-06-10
  • Firefox for Android Not supported
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

  Baseline availability blocked since August 2016 by Firefox (119 months)

• filter()

  Limited availability

  The filter() CSS function applies one or more graphic effects to a CSS image, such as a background image. You can use functions, such as blur() and drop-shadow(), alone or combined to produce different effects. For instance, background: filter(url(image.png), blur(2px)).

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 9.1 Released on 2016-03-21
  • Safari on iOS 9.3 Released on 2016-03-21

• Media source

  Limited availability

  The MediaSource API is a custom data source for media elements commonly used for adaptive streaming. Also known as Media Source Extensions (MSE).

  Learn more

  • Chrome 31 Released on 2013-11-12
  • Chrome Android 31 Released on 2013-11-14
  • Edge 12 Released on 2015-07-29
  • Firefox 42 Released on 2015-11-03
  • Firefox for Android 41 Released on 2015-09-22
  • Safari 8 Released on 2014-10-16
  • Safari on iOS Not supported

  Baseline availability blocked since November 2015 by Safari (128 months)

• beforeunload

  Limited availability

  The beforeunload event is fired when the current window is about to be unloaded. Typically this is used to display a dialog to confirm if users really want to leave the page when there is unsaved data that would be lost.

  Learn more

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 1 Released on 2004-11-09
  • Firefox for Android 4 Released on 2011-03-29
  • Safari 3 Released on 2007-10-26
  • Safari on iOS Not supported

  Baseline availability blocked since July 2015 by Safari (132 months)

• devicePixelRatio

  Limited availability

  The window.devicePixelRatio property is the ratio of the size of one CSS pixel to the vertical size of one physical pixel on the current display device.

  Learn more

  • Chrome 1 Released on 2008-12-11
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 18 Released on 2013-01-08
  • Firefox for Android 18 Released on 2013-01-08
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2015 by Safari (132 months)

• <link rel="prefetch">

  Limited availability

  The rel="prefetch" attribute for the <link> HTML element is a hint to the browser that the user is likely to navigate to a resource, so the browser should preemptively fetch and cache the resource.

  Learn more

  • Chrome 8 Released on 2010-12-02
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox 2 Released on 2006-10-24
  • Firefox for Android 4 Released on 2011-03-29
  • Safari Not supported
  • Safari on iOS Not supported

  Baseline availability blocked since July 2015 by Safari (132 months)

• Page selectors

  Limited availability

  The :first, :left, and :right pseudo-classes select pages based on their position in sequence after pagination.

  Learn more

  • Chrome 18 Released on 2012-03-28
  • Chrome Android 18 Released on 2012-06-27
  • Edge 12 Released on 2015-07-29
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 6 Released on 2012-07-25
  • Safari on iOS 6 Released on 2012-09-10

  Baseline availability blocked since July 2015 by Firefox (132 months)

• WEBGL_compressed_texture_s3tc WebGL extension

  Limited availability

  The WEBGL_compressed_texture_s3tc extension for WebGL 1.0 and 2.0 contexts adds S3TC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

  Learn more

  • Chrome 26 Released on 2013-03-26
  • Chrome Android Not supported
  • Edge 12 Released on 2015-07-29
  • Firefox 22 Released on 2013-06-25
  • Firefox for Android Not supported
  • Safari 8 Released on 2014-10-16
  • Safari on iOS Not supported

• Wheel events

  Limited availability

  The wheel event fires when the user moves a mouse wheel or similar spatially rotating input device.

  Learn more

  • Chrome 31 Released on 2013-11-12
  • Chrome Android 31 Released on 2013-11-14
  • Edge 12 Released on 2015-07-29
  • Firefox 17 Released on 2012-11-20
  • Firefox for Android 17 Released on 2012-11-20
  • Safari 7 Released on 2013-10-22
  • Safari on iOS Not supported

  Baseline availability blocked since July 2015 by Safari (132 months)

• Widows and orphans

  Limited availability

  The widows and orphans CSS properties set the minimum lines included in a text fragment created by page, column, or region breaks.

  Learn more

  • Chrome 25 Released on 2013-02-21
  • Chrome Android 25 Released on 2013-02-27
  • Edge 12 Released on 2015-07-29
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 1.3 Released on 2005-04-15
  • Safari on iOS 1 Released on 2007-06-29

  Baseline availability blocked since July 2015 by Firefox (132 months)

• font-variant-position

  Limited availability

  The font-variant-position CSS property sets whether to use alternate glyphs for subscript and superscript text.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 34 Released on 2014-12-01
  • Firefox for Android 34 Released on 2014-12-01
  • Safari Not supported
  • Safari on iOS Not supported

• Audio and video tracks

  Limited availability

  The audioTracks and videoTracks APIs for media elements switch audio and video tracks during playback.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

• fastSeek()

  Limited availability

  The fastSeek() method seeks an <audio> or <video> element as fast as possible, by seeking to a keyframe instead of exactly the requested time.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 31 Released on 2014-07-22
  • Firefox for Android 31 Released on 2014-07-22
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

  Baseline availability blocked since October 2014 by Chromium (141 months)

• WEBGL_compressed_texture_pvrtc WebGL extension

  Limited availability

  The WEBGL_compressed_texture_pvrtc extension for WebGL 1.0 and 2.0 contexts adds PVRTC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

  Learn more

  • Chrome Not supported
  • Chrome Android 28 Released on 2013-07-10
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

• Custom ellipses

  Limited availability

  The text-overflow CSS property with a string value sets the string representing clipped text.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 9 Released on 2011-12-20
  • Firefox for Android 9 Released on 2011-12-21
  • Safari Not supported
  • Safari on iOS Not supported

• Alternative style sheets

  Limited availability

  The rel="alternate stylesheet" attribute for the <link> HTML element offers an alternative style option to users.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox 3 Released on 2008-06-17
  • Firefox for Android 4 Released on 2011-03-29
  • Safari Not supported
  • Safari on iOS Not supported

• Ambient light sensor

  Limited availability

  The AmbientLightSensor API returns the current light level in lux of the ambient light level around the device.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• attr()

  Limited availability

  The attr() CSS function, in the context of any property, returns the value of an attribute of an HTML element, with the option to return it as a specific type or unit. You can set a default value for missing or invalid attributes.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported
  • Safari on iOS Not supported

• HTML in canvas

  Limited availability

  A <canvas> HTML element with the layoutsubtree attribute can draw descendant elements in its rendering context. You can use it to style and layout text in a canvas, expose canvas content to browser features (like accessibility, translate, or find-in-page), and apply 2D and 3D effects to HTML.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Custom media queries

  Limited availability

  The @custom-media CSS at-rule names a media query, which you can reuse in multiple @media rules.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• Form-associated WebMCP attributes

  Limited availability

  The toolname, tooldescription, and toolautosubmit HTML form element attributes register actions that can be called by in-browser AI agents or browser extensions. Also known as declarative WebMCP.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• Device-bound session credentials

  Limited availability

  Device-bound session credentials is a protocol to request proof of possession of a private key. Regularly confirming key possession can help protect against cookie theft.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported
  • Firefox for Android Not supported
  • Safari Not supported
  • Safari on iOS Not supported

• display: contents

  Limited availability

  The display: contents CSS declaration sets an element to display only its contents, not itself.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position: positive
  • Firefox for Android Not supported Position: positive
  • Safari Not supported Position: neutral
  • Safari on iOS Not supported Position: neutral

• document.modelContext

  Limited availability

  The document.modelContext API registers page actions that can be called by in-browser AI agents or browser extensions. Also known as WebMCP.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
  • Firefox Not supported Position
  • Firefox for Android Not supported Position
  • Safari Not supported Position: oppose
  • Safari on iOS Not supported Position: oppose

• element()

  Limited availability

  The element() CSS function creates a live-updating image from an HTML element that can be used as an image or background image.

  Learn more

  • Chrome Not supported
  • Chrome Android Not supported
  • Edge Not supported
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• EXT_disjoint_timer_query WebGL extension

  Limited availability

  The EXT_disjoint_timer_query extension for WebGL 1.0 contexts measures the duration of a set of GL commands, without stalling the rendering pipeline.

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• fit-content()

  Limited availability

  The fit-content() CSS function, used outside of a grid layout property, clamps a length between min-content and max-content.

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• focusgroup

  Limited availability

  The focusgroup global HTML attribute combines descendant elements into a single tab stop, with arrow-key navigation between them, for toolbars, tabs, menus, radio groups, and other composite controls. It's an alternative to the sequential navigation of tabindex.

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• getBoxQuads()

  Limited availability

  The getBoxQuads() method, when called on a document, element, pseudo-element, or text node, returns the list of DOMQuad objects that represent the CSS boxes used to render the node.

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• Heading offset

  Limited availability

  The headingoffset HTML attribute offsets the heading level of descendant <h1>–<h6> elements. The headingreset HTML attribute prevents heading offset computation from traversing beyond the element.

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• Heading pseudo-classes

  Limited availability

  The :heading and :heading() CSS pseudo-classes match headings of varying levels. The :heading pseudo-class matches any heading (<h1> through <h6>). The :heading() selector matches any of the given levels. For example, :heading(1, 2) matches headings level 1 and 2.

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• image()

  Limited availability

  The image() CSS function creates an image similar to url() but with additional functionality. It can create a solid color as an image, provide a fallback from an image URL to a solid color, or clip a sprite image using media fragments. Not to be confused with the Image() constructor.

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• <install>

  Limited availability

  The <install> HTML element represents a button that, upon activation, prompts the user to choose whether to install a progressive web app.

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• line-clamp

  Limited availability

  The line-clamp CSS property limits the text in a block container to a certain number of lines. The prefixed -webkit-line-clamp is widely supported but only works with -webkit-box-orient: vertical in combination with display: -webkit-box or display: -webkit-inline-box.

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• Magnetometer

  Limited availability

  The Magnetometer API reads magnetic field sensor data from the device's magnetometer.

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• Web app manifest localization

  Limited availability

  The _localized suffixed members of the web app manifest set translated names, descriptions, icons, and shortcuts. The browser automatically selects resources based on the user's language and region settings.

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• Masonry

  Limited availability

  The display: grid-lanes or display: inline-grid-lanes CSS declaration creates a layout where items are tightly packed, like brickwork, in parallel lanes. Items are placed one by one in the lane that has the most available space.

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• @mixin

  Limited availability

  The @mixin and @apply CSS at-rules define reusable style declaration fragments and apply them inside rules, optionally passing arguments.

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• navigator.install()

  Limited availability

  The navigator.install() method triggers a request to install a progressive web app.

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• OpaqueRange

  Limited availability

  The createValueRange() for form elements, such as <textarea> or <input type="text">, gets an OpaqueRange object that represents a live span of text. You can use this for range-based operations on the input text, such as setting custom highlights or placing autocomplete popovers.

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• path()

  Limited availability

  The path() CSS shape function creates a shape for clip-path, shape-outside, and the SVG attribute d.

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• prefers-reduced-data media query

  Limited availability

  The prefers-reduced-data CSS media query detects whether the user has a preference for using less network traffic. For example, you can use this media query to avoid loading large font files and use a system font instead.

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• Reference target

  Limited availability

  The referenceTarget property of a ShadowRoot object forwards attributes such as for and aria-labelledby to elements inside a shadow DOM. You can use this to, for example, link a <label> to its <input> even if the <input> is in the shadow DOM of a web component.

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• Integrity violation reports

  Limited availability

  Subresource integrity violation reporting sends a report to a URL nominated by the Reporting-Endpoints header or the ReportingObserver API when a resource request violates an integrity check.

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• Rhythmic sizing

  Limited availability

  The line-height-step CSS property creates consistent vertical rhythm by setting the spacing between body text baselines. It rounds taller lines like headings up to the next multiple of the body text spacing.

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• ::scroll-button

  Limited availability

  The ::scroll-button(<dir>) CSS pseudo-element is a focusable button which scrolls its originating scroll container element in the specified direction.

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• speak

  Limited availability

  The speak CSS property sets whether or not text should be spoken.

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• text-autospace

  Limited availability

  The text-autospace CSS property sets whether and how to insert spaces in inter-script text (such as when mixing Latin and Chinese characters) and around punctuation.

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• TransformStream transformer cancel() method

  Limited availability

  The cancel() method of a TransformStream transformer cleans up resources when the readable side cancels or the writable side aborts.

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• <usermedia>

  Limited availability

  The <usermedia> HTML element represents a button that, upon activation, toggles camera or microphone streams. If needed, it may prompt the user to choose whether to grant the page access to the camera and microphone.

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• WebGPU subgroups

  Limited availability

  The subgroups extension for the WebGPU Shading Language (WGSL) enables SIMD parallelism. Using subgroups, threads in a workgroup can efficiently communicate and perform collective operations.

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• WebNN

  Limited availability

  The WebNN API constructs and executes computational graphs of neural networks by making use of the various machine learning capabilities and hardware accelerators available on the device. Also known as Web Neural Network API.

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