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

  Tags: css Groups: CSS > Background

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• Float16Array

  Limited availability

  Tags: javascript Groups: JavaScript > Collections > Typed arrays

  Float16Array is a typed array of 16-bit floating point numbers.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 129 Released on 2024-08-06
  • Firefox for Android 129 Released on 2024-08-06
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• line-clamp

  Limited availability

  Tags: css Groups: CSS

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• Promise.try()

  Limited availability

  Tags: javascript Groups: JavaScript > Promises

  The Promise.try() static method returns a promise that takes a callback of any kind (returns or throws, synchronously or asynchronously) and wraps its result in a Promise.

  Baseline availability blocked since December 2024 by Firefox (0 months)

  Learn more

  • Chrome 128 Released on 2024-08-20
  • Chrome Android 128 Released on 2024-08-20
  • Edge 128 Released on 2024-08-22
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• RegExp.escape()

  Limited availability

  Tags: javascript

  The RegExp.escape() static method takes a string and replaces any characters that are potentially special characters of a regular expression with equivalent escape sequences. For example, RegExp.escape("[abc]") returns "\\[abc\\]".

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• ruby-overhang

  Limited availability

  Tags: css Groups: Ruby

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• text-box

  Limited availability

  Tags: css Groups: CSS > Text

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• Uint8Array base64 and hex conversion

  Limited availability

  Tags: javascript Groups: JavaScript > Collections > Typed arrays

  The Uint8Array object methods fromBase64(), toBase64(), and setFromBase64() convert to and from base64 strings. The fromHex(), toHex(), and setFromHex() methods convert to and from hex strings.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 133 Released on 2024-11-26
  • Firefox for Android 133 Released on 2024-11-26
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• view-transition-class

  Limited availability

  Tags: css Groups: View Transitions

  The view-transition-class CSS property sets a name that can be used to apply styles to multiple named view transition pseudo-elements.

  Baseline availability blocked since December 2024 by Firefox (0 months)

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• View transitions

  Limited availability

  Tags: api css Groups: View Transitions

  View transitions allow you to create animated visual transitions between different states of a document.

  Baseline availability blocked since December 2024 by Firefox (0 months)

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 18.2 Released on 2024-12-11
  • Safari on iOS 18.2 Released on 2024-12-11

• ::details-content

  Limited availability

  Tags: css Groups: CSS > Selectors

  The ::details-content pseudo-element selects the expandable content of a <details> element, excluding the <summary>.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• font-variant-emoji

  Limited availability

  Tags: css Groups: CSS > Fonts > Typographic font features

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

  Learn more

  • Chrome 131 Released on 2024-11-12
  • Chrome Android ❌
  • Edge 131 Released on 2024-11-14
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Hand input

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• box-decoration-break

  Limited availability

  Tags: css

  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.

  Baseline availability blocked since October 2024 by Safari (2 months)

  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 ❌
  • Safari on iOS ❌

• Document picture-in-picture

  Limited availability

  Tags: api

  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 ❌
  • Edge 130 Released on 2024-10-17
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position (concerns: portability, device independence)
  • Safari on iOS ❌ Vendor position (concerns: portability, device independence)

• Intl.Locale info

  Limited availability

  Tags: javascript Groups: JavaScript > Internationalization

  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.

  Baseline availability blocked since October 2024 by Firefox (2 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

• text-wrap-style

  Limited availability

  Tags: css Groups: CSS > Text > Text wrap

  The text-wrap-style CSS property sets how lines break in text that overflows the container. It can also be set with the text-wrap shorthand.

  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 ❌ Vendor position : positive (concerns: compatibility, complexity)
  • Firefox for Android ❌ Vendor position : positive (concerns: compatibility, complexity)
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• String builtins (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

  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 ❌
  • Edge 130 Released on 2024-10-17
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Iterator methods

  Limited availability

  Tags: javascript Groups: JavaScript > Iterators

  The Iterator object is an abstract base for objects that implement the iterator protocol. It provides methods common to built-in iterators, such as filter(), find(), map(), and reduce(). You can also use the static method Iterator.from() to convert an existing iterable into an Iterator.

  Baseline availability blocked since October 2024 by Safari (2 months)

  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 131 Released on 2024-10-01
  • Firefox for Android 131 Released on 2024-10-01
  • Safari ❌
  • Safari on iOS ❌

• Exception references with exnref (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 131 Released on 2024-10-01
  • Firefox for Android 131 Released on 2024-10-01
  • Safari ❌
  • Safari on iOS ❌

• calc-size()

  Limited availability

  Tags: css Groups: CSS

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• interpolate-size

  Limited availability

  Tags: css Groups: CSS > Transitions (CSS) Animation

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Intl.DurationFormat

  Limited availability

  Tags: javascript Groups: JavaScript > Internationalization

  The Intl.DurationFormat API creates a locale-aware formatter that turns an object representing a duration (such as days, hours, and minutes) into a string.

  Baseline availability blocked since September 2024 by Firefox (3 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Scheduler API

  Limited availability

  Tags: api

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Scroll snap events

  Limited availability

  Tags: api Groups: Scrolling

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Virtual pressure sources

  Limited availability

  Tags: webdriver Groups: Compute pressure WebDriver

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : oppose (concerns: privacy, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: privacy, device independence)

• Container style queries

  Limited availability

  Tags: css Groups: CSS > Container queries

  Container style queries with the @container at-rule apply styles to an element based on the values of custom properties of its container.

  Baseline availability blocked since September 2024 by Firefox (3 months)

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

• display animation

  Limited availability

  Tags: css Groups: CSS

  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.

  Baseline availability blocked since September 2024 by Firefox (3 months)

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

• writingsuggestions

  Limited availability

  Tags: api html Groups: HTML > Forms

  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.

  Baseline availability blocked since September 2024 by Firefox (3 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 18 Released on 2024-09-16
  • Safari on iOS 18 Released on 2024-09-16

• WebCodecs

  Limited availability

  Tags: api

  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 ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• document.caretPositionFromPoint()

  Limited availability

  Tags: api

  The document.caretPositionFromPoint() method finds an insertion point, represented by a DOM node and an offset within that node, for given coordinates in the viewport.

  Baseline availability blocked since August 2024 by Safari (4 months)

  Learn more

  • Chrome 128 Released on 2024-08-20
  • Chrome Android 128 Released on 2024-08-20
  • Edge 128 Released on 2024-08-22
  • Firefox 20 Released on 2013-04-02
  • Firefox for Android 20 Released on 2013-04-02
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• WEBGL_compressed_texture_pvrtc WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

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

  Baseline availability blocked since August 2024 by Firefox (4 months)

  Learn more

  • Chrome 128 Released on 2024-08-20
  • Chrome Android 28 Released on 2013-07-10
  • Edge 128 Released on 2024-08-22
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

• CloseWatcher

  Limited availability

  Tags: api

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : neutral
  • Safari on iOS ❌ Vendor position : neutral

• Cross-document view transitions

  Limited availability

  Tags: api css Groups: View Transitions

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Shared storage

  Limited availability

  Tags: api Groups: Storage

  The sharedStorage API stores data to a shared space where the data can then be processed without the ability to track users across the different sites they visit. A common use case is measuring the reach of third-party ads without using user-tracking cookies."

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌ Vendor position (concerns: complexity, interoperability, privacy, dependencies)
  • Safari on iOS ❌ Vendor position (concerns: complexity, interoperability, privacy, dependencies)

• ClipboardItem.supports()

  Limited availability

  Tags: api Groups: Clipboard

  The ClipboardItem.supports() static method checks if the browser supports writing data types such as "image/svg+xml" or other custom formats to the system clipboard.

  Baseline availability blocked since June 2024 by Safari (6 months)

  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 127 Released on 2024-06-11
  • Firefox for Android 127 Released on 2024-06-11
  • Safari ❌
  • Safari on iOS ❌

• Active view transition

  Limited availability

  Tags: api css Groups: View Transitions CSS > Selectors

  The :active-view-transition CSS pseudo-class matches the root element when a view transition is active. The :active-view-transition-type() CSS pseudo-class matches only when the active view transition was started with the specified type.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Anchor positioning

  Limited availability

  Tags: api css

  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 125 Released on 2024-05-14
  • Chrome Android 125 Released on 2024-05-14
  • Edge 125 Released on 2024-05-17
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Attribution reporting

  Limited availability

  Tags: api html http

  The Attribution Reporting API measures when an ad click or view leads to a conversion, such as a purchase on an advertiser site.

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position (concerns: interoperability, venue)
  • Safari on iOS ❌ Vendor position (concerns: interoperability, venue)

• Back/forward cache blocking reasons

  Limited availability

  Tags: api Groups: Performance

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• CPU compute pressure

  Limited availability

  Tags: api html http Groups: Compute pressure

  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 ❌
  • Edge 125 Released on 2024-05-17
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : oppose (concerns: privacy, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: privacy, device independence)

• Non-cookie storage access

  Limited availability

  Tags: api Groups: Storage

  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 ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Screen wake lock

  Limited availability

  Tags: api html http

  The navigator.wakeLock.request("screen") API prevents the device's screen from dimming or being turned off.

  Baseline availability blocked since May 2024 by Safari on iOS (7 months)

  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 126 Released on 2024-05-14
  • Firefox for Android 126 Released on 2024-05-14
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS ❌ Vendor position : support (concerns: power)

• Zstandard compression

  Limited availability

  Tags: http

  Zstandard or zstd is fast lossless compression algorithm. When used as a content encoding, it is often faster and offers better compression than brotli.

  Baseline availability blocked since May 2024 by Safari (7 months)

  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 126 Released on 2024-05-14
  • Firefox for Android 126 Released on 2024-05-14
  • Safari ❌
  • Safari on iOS ❌

• @starting-style

  Limited availability

  Tags: api css Groups: CSS

  The @starting-style CSS at-rule sets the starting values for properties that are transitioning when the target element's style is first updated.

  Baseline availability blocked since May 2024 by Firefox (7 months)

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 17.5 Released on 2024-05-13
  • Safari on iOS 17.5 Released on 2024-05-13

• Asynchronously iterable streams

  Limited availability

  Tags: api Groups: Streams

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

  Baseline availability blocked since April 2024 by Safari (8 months)

  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 ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• SVG clipboard items

  Limited availability

  Tags: api Groups: Clipboard

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• context-fill and context-stroke

  Limited availability

  Tags: svg Groups: SVG

  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.

  Baseline availability blocked since April 2024 by Safari (8 months)

  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 ❌
  • Safari on iOS ❌

• Inert elements

  Limited availability

  Tags: api html Groups: HTML

  The inert HTML attribute marks an element and its descendants as non-interactive. Inert elements don't get focus or fire click events.

  Baseline availability blocked since April 2024 by Safari (8 months)

  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 120 Released on 2023-11-21
  • Firefox for Android 120 Released on 2023-11-21
  • Safari ❌
  • Safari on iOS ❌

• contextlost and contextrestored

  Limited availability

  Tags: api Groups: Canvas

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

  Baseline availability blocked since April 2024 by Safari (8 months)

  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 ❌
  • Safari on iOS ❌

• Popover

  Limited availability

  Tags: api css html Groups: HTML

  The popover HTML attribute creates an overlay to display content on top of other page content. Popovers can be shown declaratively using HTML, or using the showPopover() method.

  Baseline availability blocked since April 2024 by Safari on iOS (8 months)

  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 125 Released on 2024-04-16
  • Firefox for Android 125 Released on 2024-04-16
  • Safari 17 Released on 2023-09-18
  • Safari on iOS ❌

• Multi-memory (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

  A single module in WebAssembly can have multiple memories.

  Baseline availability blocked since April 2024 by Safari (8 months)

  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 ❌
  • Safari on iOS ❌

• CSS import attributes

  Limited availability

  Tags: javascript

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

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• display-mode media query

  Limited availability

  Tags: css Groups: CSS > Media queries

  The display-mode CSS media query sets styles based on whether the web page is in fullscreen, standalone, minimal-ui, browser, or picture-in-picture mode.

  Learn more

  • Chrome 123 Released on 2024-03-19
  • Chrome Android ❌
  • Edge 123 Released on 2024-03-22
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• field-sizing

  Limited availability

  Tags: css Groups: CSS

  The field-sizing CSS property allows form controls such as <textarea> to be sized based on their content.

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• JSON import attributes

  Limited availability

  Tags: javascript Groups: JavaScript > JSON

  Module import … with { type: "json" } statements load JSON data. Also known as JSON module scripts and formerly known as import assertions.

  Baseline availability blocked since March 2024 by Firefox (9 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• Long animation frames

  Limited availability

  Tags: api Groups: Performance

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• paint-order

  Limited availability

  Tags: css svg Groups: CSS

  The paint-order CSS property sets the z-order of strokes, fills, and (in SVG content) markers. For example, paint-order: markers stroke fill; draws the markers, then stroke on top of markers, then fill on top of both markers and stroke.

  Baseline availability blocked since March 2024 by Safari on iOS (9 months)

  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 ≤66 Released before 2019-03-19
  • Firefox for Android ≤66 Released before 2019-03-19
  • Safari ≤12 Released before 2018-09-17
  • Safari on iOS ❌

• text-spacing-trim

  Limited availability

  Tags: css Groups: CSS

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Application shortcuts

  Limited availability

  Tags: html Groups: Progressive web app

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS ❌

• @scope

  Limited availability

  Tags: api css Groups: CSS

  The @scope CSS at-rule sets the scope for a group of rules.

  Baseline availability blocked since March 2024 by Firefox (9 months)

  Learn more

  • Chrome 118 Released on 2023-10-10
  • Chrome Android 118 Released on 2023-10-10
  • Edge 118 Released on 2023-10-13
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• showPicker() for <input>

  Limited availability

  Tags: api Groups: HTML > Forms

  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.

  Baseline availability blocked since March 2024 by Safari on iOS (9 months)

  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 ❌

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

  Limited availability

  Tags: css Groups: CSS > Selectors

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

  Baseline availability blocked since March 2024 by Firefox (9 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• Read unsanitized clipboard data

  Limited availability

  Tags: api Groups: Clipboard

  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 ❌ Vendor position : neutral
  • Firefox for Android ❌ Vendor position : neutral
  • Safari ❌
  • Safari on iOS ❌

• Storage buckets

  Limited availability

  Tags: api Groups: Storage

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• EditContext

  Limited availability

  Tags: api

  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 ❌ Vendor position : positive (concerns: compatibility)
  • Firefox for Android ❌ Vendor position : positive (concerns: compatibility)
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• font-palette animation

  Limited availability

  Tags: css Groups: CSS > Fonts

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Remote playback

  Limited availability

  Tags: api html

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

  Baseline availability blocked since January 2024 by Firefox (11 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• scrollbar-color

  Limited availability

  Tags: css Groups: Scrolling

  The scrollbar-color CSS property sets the color of the scrollbar track and thumb.

  Baseline availability blocked since January 2024 by Safari (11 months)

  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 64 Released on 2018-12-11
  • Firefox for Android 64 Released on 2018-12-11
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• showPicker() for <select>

  Limited availability

  Tags: api Groups: HTML > Forms

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

  Baseline availability blocked since January 2024 by Safari (11 months)

  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 ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Largest contentful paint (LCP)

  Limited availability

  Tags: api Groups: Performance

  The largest-contentful-paint performance entry and the LargestContentfulPaint API measures the time it takes for the largest image or text to appear. Largest contentful paint (LCP) is a common metric for perceived loading times.

  Baseline availability blocked since January 2024 by Safari (11 months)

  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 122 Released on 2024-01-23
  • Firefox for Android 122 Released on 2024-01-23
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• page-orientation

  Limited availability

  Tags: css Groups: CSS > Layout Print media

  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.

  Baseline availability blocked since January 2024 by Safari (11 months)

  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 ❌
  • Safari on iOS ❌

• text-indent: each-line

  Limited availability

  Tags: css Groups: CSS > Text

  The text-indent: each-line CSS declaration indents text after forced breaks as well as to the first line of a block.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 121 Released on 2023-12-19
  • Firefox for Android 121 Released on 2023-12-19
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• text-indent: hanging

  Limited availability

  Tags: css Groups: CSS > Text

  The text-indent: hanging CSS declaration indents all lines except the first.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 121 Released on 2023-12-19
  • Firefox for Android 121 Released on 2023-12-19
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• createImageBitmap

  Limited availability

  Tags: api

  The createImageBitmap() global method creates an ImageBitmap object from a source such as an image, SVG, blob, or canvas. An ImageBitmap object represents pixel data that can be drawn to a canvas with lower latency than other types, such as ImageData.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• Fetch priority

  Limited availability

  Tags: api html http

  The fetch() priority option and the fetchPriority HTML attribute give hints to the browser about which requests to do before other requests of the same type.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  Learn more

  • Chrome 103 Released on 2022-06-21
  • Chrome Android 103 Released on 2022-06-21
  • Edge 103 Released on 2022-06-23
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• Custom highlights

  Limited availability

  Tags: api css

  Custom highlights style arbitrary text ranges, without adding extra elements to the DOM.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• mask-border

  Limited availability

  Tags: css Groups: Clipping, shapes and masking

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS ❌

• Numeric factory functions

  Limited availability

  Tags: api Groups: CSS > CSS object models

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

  Baseline availability blocked since December 2023 by Firefox (12 months)

  Learn more

  • Chrome 118 Released on 2023-10-10
  • Chrome Android 118 Released on 2023-10-10
  • Edge 118 Released on 2023-10-13
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• rcap unit

  Limited availability

  Tags: css Groups: CSS > Units

  The rcap CSS length unit is a font-relative length equal to the value of the cap unit on the root element. Cap-height is approximately equal to the height of a capital Latin letter.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  Learn more

  • Chrome 118 Released on 2023-10-10
  • Chrome Android 118 Released on 2023-10-10
  • Edge 118 Released on 2023-10-13
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• rch unit

  Limited availability

  Tags: css Groups: CSS > Units

  The rch CSS length unit is a font-relative length equal to the value of the ch unit on the root element. ch length is based on the width of the zero (0) character.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• rex unit

  Limited availability

  Tags: css Groups: CSS > Units

  The rex CSS length unit is a font-relative length that is equal to the x-height of the root element.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• ric unit

  Limited availability

  Tags: css Groups: CSS > Units

  The ric CSS length unit, or root international character, is a font-relative length equal to the width of CJK character relative to the root element.

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• background-clip: text

  Limited availability

  Tags: css Groups: CSS > Background

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

  Baseline availability blocked since December 2023 by Firefox (12 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 14 Released on 2020-09-16
  • Safari on iOS 14 Released on 2020-09-16

• <fencedframe>

  Limited availability

  Tags: api html http

  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 120 Released on 2023-12-05
  • Chrome Android 120 Released on 2023-12-05
  • Edge 120 Released on 2023-12-07
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : blocked
  • Safari on iOS ❌ Vendor position : blocked

• Virtual sensors

  Limited availability

  Tags: webdriver Groups: Sensors WebDriver

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Global privacy control

  Limited availability

  Tags: api http

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 120 Released on 2023-11-21
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Beforeunload

  Limited availability

  Tags: api

  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.

  Baseline availability blocked since November 2023 by Safari on iOS (13 months)

  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 6 Released on 2011-08-16
  • Firefox for Android 6 Released on 2011-08-16
  • Safari 11 Released on 2017-09-19
  • Safari on iOS ❌

• prefers-reduced-transparency media query

  Limited availability

  Tags: css http Groups: CSS > Media queries

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position (concerns: privacy)
  • Safari on iOS ❌ Vendor position (concerns: privacy)

• word-break: auto-phrase

  Limited availability

  Tags: css Groups: CSS > Text > Text wrap

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Managed media source

  Limited availability

  Tags: api

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17.1 Released on 2023-10-25

• abs() and sign()

  Limited availability

  Tags: css Groups: CSS

  The abs() and sign() CSS functions compute the absolute value or the sign of the input.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 118 Released on 2023-09-26
  • Firefox for Android 118 Released on 2023-09-26
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• font-synthesis-position

  Limited availability

  Tags: css Groups: CSS > Fonts > Font synthesis

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 118 Released on 2023-09-26
  • Firefox for Android 118 Released on 2023-09-26
  • Safari ❌
  • Safari on iOS ❌

• Badging

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 16.4 Released on 2023-03-27

• Selection composed ranges

  Limited availability

  Tags: api Groups: Selection Web Components

  The window.getSelection().getComposedRanges() method returns ranges that represent the current user selection, even if the selection spans across shadow tree boundaries.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

• 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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : neutral
  • Firefox for Android ❌ Vendor position : neutral
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

• Web app manifest

  Limited availability

  Tags: html Groups: Progressive web app

  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.

  Baseline availability blocked since September 2023 by Firefox (15 months)

  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 ❌
  • 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

• overlay

  Limited availability

  Tags: css Groups: CSS

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• text-wrap: pretty

  Limited availability

  Tags: css Groups: CSS > Text > Text wrap

  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 ❌ Vendor position : positive (concerns: compatibility, complexity)
  • Firefox for Android ❌ Vendor position : positive (concerns: compatibility, complexity)
  • Safari ❌
  • Safari on iOS ❌

• WebRTC encoded transform

  Limited availability

  Tags: api Groups: WebRTC

  The WebRTC encoded transform API allows you to modify audio and video streams in WebRTC connections. For example, it can be used for visual effects or custom codecs.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 117 Released on 2023-08-29
  • Firefox for Android 117 Released on 2023-08-29
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• Federated credential management

  Limited availability

  Tags: api Groups: Credential management

  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 ❌ Vendor position : neutral
  • Firefox for Android ❌ Vendor position : neutral
  • Safari ❌
  • Safari on iOS ❌

• Page visibility state

  Limited availability

  Tags: api Groups: Performance

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Scroll-driven animations

  Limited availability

  Tags: api css Groups: Scrolling Animation

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• baseline-source

  Limited availability

  Tags: css

  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.

  Baseline availability blocked since July 2023 by Safari (17 months)

  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 ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• JavaScript modules in shared workers

  Limited availability

  Tags: api Groups: JavaScript modules

  The SharedWorker() constructor accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in shared workers.

  Baseline availability blocked since June 2023 by Chrome Android (18 months)

  Learn more

  • Chrome 80 Released on 2020-02-04
  • Chrome Android ❌
  • Edge 80 Released on 2020-02-07
  • Firefox 114 Released on 2023-06-06
  • Firefox for Android 114 Released on 2023-06-06
  • Safari 16 Released on 2022-09-12
  • Safari on iOS 16 Released on 2022-09-12

• WebTransport

  Limited availability

  Tags: api

  The WebTransport API transmits data between a client and a server, by using the HTTP/3 protocol.

  Baseline availability blocked since June 2023 by Safari (18 months)

  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 114 Released on 2023-06-06
  • Firefox for Android 114 Released on 2023-06-06
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Idle detection

  Limited availability

  Tags: api html http

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• JSON source text access

  Limited availability

  Tags: javascript Groups: JavaScript > JSON

  To serialize and parse JSON in a lossless way, JSON.stringify() handles rawJSON values and JSON.parse()'s reviver callback takes a source context parameter.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Partitioned cookies

  Limited availability

  Tags: api http

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position (concerns: performance)
  • Safari on iOS ❌ Vendor position (concerns: performance)

• scrollend

  Limited availability

  Tags: api Groups: Scrolling

  The scrollend event fires when an element or document has finished scrolling.

  Baseline availability blocked since June 2023 by Safari (18 months)

  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 109 Released on 2023-01-17
  • Firefox for Android 109 Released on 2023-01-17
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Relaxed-width SIMD (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : neutral
  • Safari on iOS ❌ Vendor position : neutral

• WebGPU

  Limited availability

  Tags: api

  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 113 Released on 2023-05-02
  • Chrome Android ❌
  • Edge 113 Released on 2023-05-05
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Atomics.waitAsync

  Limited availability

  Tags: javascript Groups: JavaScript

  The Atomics.waitAsync() static method waits for a value in a shared memory location, providing a promise when the expected value is not yet in memory. The waitAsync() method is a non-blocking alternative to Atomics.wait().

  Baseline availability blocked since March 2023 by Firefox (21 months)

  Learn more

  • Chrome 87 Released on 2020-11-17
  • Chrome Android 89 Released on 2021-03-02
  • Edge 87 Released on 2020-11-19
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Audio session

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• CSS typed object model

  Limited availability

  Tags: api Groups: CSS > CSS object models

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

  Baseline availability blocked since March 2023 by Firefox (21 months)

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Fullscreen API

  Limited availability

  Tags: api css html http

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

  Baseline availability blocked since March 2023 by Safari on iOS (21 months)

  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 ❌

• Gamepad haptic feedback

  Limited availability

  Tags: api Groups: Gamepad

  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 ❌
  • Firefox for Android ❌
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS ❌

• margin-trim

  Limited availability

  Tags: css Groups: CSS

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Window management

  Limited availability

  Tags: api http

  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 ❌
  • Edge 111 Released on 2023-03-13
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• <datalist>

  Limited availability

  Tags: api html Groups: HTML > Forms

  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.

  Baseline availability blocked since February 2023 by Firefox for Android (22 months)

  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 ❌
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

• Credentialless iframes

  Limited availability

  Tags: api html Groups: Security

  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 ❌ Vendor position (concerns: venue)
  • Firefox for Android ❌ Vendor position (concerns: venue)
  • Safari ❌
  • Safari on iOS ❌

• initial-letter

  Limited availability

  Tags: css Groups: CSS

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Math font family

  Limited availability

  Tags: css

  The font-family: math CSS declaration uses the browser default font face for displaying mathematical expressions.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Hyphenate limit chars

  Limited availability

  Tags: css Groups: CSS > Text > Text wrap

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Web MIDI

  Limited availability

  Tags: api html http

  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 ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• COLRv1

  Limited availability

  Tags: css Groups: CSS > Fonts

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

  Baseline availability blocked since November 2022 by Safari (25 months)

  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 ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Raw camera access for WebXR

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : oppose (concerns: privacy)
  • Safari on iOS ❌ Vendor position : oppose (concerns: privacy)

• Scroll to text fragment

  Limited availability

  Groups: Text fragments Scrolling

  Text fragments are URL fragments on the form #:~:text=snippet and link to a snippet of text within a page. The browser may scroll, highlight, or otherwise bring that text to the reader's attention.

  Baseline availability blocked since October 2022 by Firefox (26 months)

  Learn more

  • Chrome 81 Released on 2020-04-07
  • Chrome Android 81 Released on 2020-04-07
  • Edge 83 Released on 2020-05-21
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari 16.1 Released on 2022-10-24
  • Safari on iOS 16.1 Released on 2022-10-24

• WebDriver BiDi

  Limited availability

  Groups: WebDriver

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

  Baseline availability blocked since October 2022 by Safari (26 months)

  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 ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• EXT_texture_compression_bptc WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Safari 16 Released on 2022-09-12
  • Safari on iOS ❌

• EXT_texture_norm16c WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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.

  Baseline availability blocked since September 2022 by Firefox (27 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 16 Released on 2022-09-12
  • Safari on iOS 16 Released on 2022-09-12

• blocking="render"

  Limited availability

  Tags: api html http Groups: HTML

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Picture-in-picture (video)

  Limited availability

  Tags: api css html http

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

  Baseline availability blocked since September 2022 by Firefox (27 months)

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• text-decoration in ::selection

  Limited availability

  Tags: css Groups: CSS > Selectors Selection

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Window Controls Overlay

  Limited availability

  Tags: api css html Groups: Progressive web app

  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 ❌
  • Edge 105 Released on 2022-09-01
  • Firefox ❌ Vendor position : defer
  • Firefox for Android ❌ Vendor position : defer
  • Safari ❌
  • Safari on iOS ❌

• Custom formats for clipboard items

  Limited availability

  Tags: api Groups: Clipboard

  The web prefix for ClipboardItem data types (also known as MIME types) allows reading and writing ununsanitized 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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• object-view-box

  Limited availability

  Tags: css Groups: CSS

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Serializable errors

  Limited availability

  Tags: api javascript

  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().

  Baseline availability blocked since July 2022 by Safari (29 months)

  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 ❌
  • Safari on iOS ❌

• Local fonts

  Limited availability

  Tags: api html http

  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 ❌
  • Edge 103 Released on 2022-06-23
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• File handlers

  Limited availability

  Tags: api html Groups: Progressive web app

  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 ❌
  • Edge 102 Released on 2022-05-31
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Column breaks

  Limited availability

  Tags: css Groups: CSS > Layout

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• hidden="until-found"

  Limited availability

  Tags: html Groups: HTML

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Navigation API

  Limited availability

  Tags: api

  The navigation API initiates, intercepts, or modifies browser navigation actions. Not to be confused with the navigator API.

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• video-dynamic-range media query

  Limited availability

  Tags: css Groups: CSS > Media queries

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 100 Released on 2022-05-03
  • Firefox for Android 100 Released on 2022-05-03
  • Safari ❌
  • Safari on iOS ❌

• Digital goods

  Limited availability

  Tags: api

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

  Learn more

  • Chrome ❌
  • Chrome Android 101 Released on 2022-04-26
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Web NFC

  Limited availability

  Tags: api

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

  Learn more

  • Chrome ❌
  • Chrome Android 100 Released on 2022-03-29
  • Edge ❌
  • Firefox ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• Media element pseudo-classes

  Limited availability

  Tags: css Groups: HTML > Media elements

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• Print color adjust

  Limited availability

  Tags: css Groups: Print media

  The print-color-adjust CSS property sets whether styles of printed pages should be adjusted to use less ink, in cases such as light text on a dark background.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 97 Released on 2022-02-08
  • Firefox for Android 97 Released on 2022-02-08
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• BarProp

  Limited availability

  Tags: api

  The visible property of the window.locationbar, window.menubar, window.personalbar, window.scrollbars, window.statusbar, and window.toolbar APIs historically represented the visibility of a browser user interface. For privacy reasons, it now represents whether the window is a pop-up.

  Baseline availability blocked since February 2022 by Safari (34 months)

  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 96 Released on 2022-01-11
  • Firefox for Android 96 Released on 2022-01-11
  • Safari ❌
  • Safari on iOS ❌

• User agent client hints

  Limited availability

  Tags: api http

  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 98 Released on 2022-02-01
  • Chrome Android 98 Released on 2022-02-01
  • Edge 98 Released on 2022-02-03
  • Firefox ❌ Vendor position : neutral
  • Firefox for Android ❌ Vendor position : neutral
  • Safari ❌ Vendor position : blocked (concerns: interoperability, privacy)
  • Safari on iOS ❌ Vendor position : blocked (concerns: interoperability, privacy)

• Reversed counter-reset

  Limited availability

  Tags: css Groups: CSS > Counters

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 96 Released on 2022-01-11
  • Firefox for Android 96 Released on 2022-01-11
  • Safari ❌
  • Safari on iOS ❌

• Color management for 2D canvas

  Limited availability

  Tags: api Groups: Canvas

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

  Baseline availability blocked since December 2021 by Firefox (36 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 15.2 Released on 2021-12-13
  • Safari on iOS 15.2 Released on 2021-12-13

• Cursor styles

  Limited availability

  Tags: css svg Groups: CSS

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

  Baseline availability blocked since December 2021 by Safari on iOS (36 months)

  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 ❌

• Protocol handlers

  Limited availability

  Tags: html Groups: Progressive web app

  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 96 Released on 2021-11-15
  • Edge 96 Released on 2021-11-19
  • Firefox ❌ Vendor position : defer
  • Firefox for Android ❌ Vendor position : defer
  • Safari ❌
  • Safari on iOS ❌

• Eyedropper

  Limited availability

  Tags: api

  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 ❌
  • Edge 96 Released on 2021-11-19
  • Firefox ❌ Vendor position (concerns: integration, API design)
  • Firefox for Android ❌ Vendor position (concerns: integration, API design)
  • Safari ❌ Vendor position (concerns: API design, maintenance)
  • Safari on iOS ❌ Vendor position (concerns: API design, maintenance)

• Reporting API

  Limited availability

  Tags: api http

  The Reporting API makes consistent reports about Content Security Policy violations, Permissions-Policy violations, deprecated feature usage, crashes, and other web platform features available to your server endpoints.

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• URLPattern

  Limited availability

  Tags: api

  The URLPattern API creates patterns that can be matched against URLs or URL components.

  Learn more

  • Chrome 95 Released on 2021-10-19
  • Chrome Android 95 Released on 2021-10-19
  • Edge 95 Released on 2021-10-21
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• smooth

  Limited availability

  Tags: css Groups: Images > Image scaling

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 93 Released on 2021-10-05
  • Firefox for Android 93 Released on 2021-10-05
  • Safari ❌
  • Safari on iOS ❌

• Profiler

  Limited availability

  Tags: api

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Virtual keyboard

  Limited availability

  Tags: api html

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position (concerns: device independence)
  • Safari on iOS ❌ Vendor position (concerns: device independence)

• Ink

  Limited availability

  Tags: api

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Desynchronized 2D canvas

  Limited availability

  Tags: api Groups: Canvas

  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.

  Baseline availability blocked since September 2021 by Firefox (39 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• EXT_frag_depth WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Firefox 47 Released on 2016-06-07
  • Firefox for Android ❌
  • Safari 9 Released on 2015-09-30
  • Safari on iOS 15 Released on 2021-09-20

• JavaScript modules in service workers

  Limited availability

  Tags: api javascript Groups: JavaScript modules

  The navigator.serviceWorker.register() method accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in service workers.

  Baseline availability blocked since September 2021 by Firefox (39 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• Media session

  Limited availability

  Tags: api

  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.

  Baseline availability blocked since September 2021 by Firefox for Android (39 months)

  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 ❌ Vendor position : positive
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• <meta name="theme-color">

  Limited availability

  Tags: html Groups: HTML

  The name="theme-color" attribute for the <meta> HTML element sets the preferred color to customize the display of the page or the surrounding browser user interface.

  Learn more

  • Chrome ❌
  • Chrome Android 92 Released on 2021-07-20
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• WEBGL_draw_buffers WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Edge 17 Released on 2018-04-30
  • Firefox 28 Released on 2014-03-18
  • Firefox for Android ❌
  • Safari 9 Released on 2015-09-30
  • Safari on iOS 15 Released on 2021-09-20

• WEBGL_multi_draw WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

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

  Baseline availability blocked since September 2021 by Firefox (39 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• accent-color

  Limited availability

  Tags: css Groups: CSS

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

  Baseline availability blocked since September 2021 by Safari (39 months)

  Learn more

  • Chrome 93 Released on 2021-08-31
  • Chrome Android 93 Released on 2021-08-31
  • Edge 93 Released on 2021-09-02
  • Firefox 92 Released on 2021-09-07
  • Firefox for Android 92 Released on 2021-09-07
  • Safari ❌
  • Safari on iOS ❌

• EXT_texture_compression_rgtc WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Firefox for Android ❌
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS ❌

• navigator.share()

  Limited availability

  Tags: api html http

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

  Learn more

  • Chrome ❌
  • Chrome Android 61 Released on 2017-09-05
  • Edge 93 Released on 2021-09-02
  • Firefox ❌ Vendor position : positive
  • 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

• WebOTP

  Limited availability

  Tags: api html http Groups: Credential management

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• OVR_multiview2 WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Chrome Android 93 Released on 2021-08-31
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Event timing

  Limited availability

  Tags: api Groups: Performance

  The event and first-input performance entries and the PerformanceEventTiming API measures the latency of user input events, such as mouse clicks or keypresses, and the latency of the first user input. First Input Delay (FID) is a common metric for perceived responsiveness.

  Baseline availability blocked since June 2021 by Safari (42 months)

  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 89 Released on 2021-06-01
  • Firefox for Android 89 Released on 2021-06-01
  • Safari ❌ Vendor position (concerns: duplication, interoperability)
  • Safari on iOS ❌ Vendor position (concerns: duplication, interoperability)

• Font metric overrides

  Limited availability

  Tags: api css Groups: CSS > Fonts

  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.

  Baseline availability blocked since June 2021 by Safari (42 months)

  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 ❌
  • Safari on iOS ❌

• Accelerometer

  Limited availability

  Tags: api http Groups: Sensors

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)

• EXT_float_blend WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

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

  Baseline availability blocked since April 2021 by Safari on iOS (44 months)

  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 ❌

• KHR_parallel_shader_compile WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

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

  Baseline availability blocked since April 2021 by Firefox (44 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

• WEBGL_compressed_texture_s3tc_srgb WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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().

  Baseline availability blocked since April 2021 by Firefox for Android (44 months)

  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 ❌
  • Safari 14.1 Released on 2021-04-26
  • Safari on iOS 14.5 Released on 2021-04-26

• WebVTT cue alignment

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • 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

• Depth sensing

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Lighting estimation

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Share targets

  Limited availability

  Tags: html Groups: Progressive web app

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : neutral (concerns: security, integration)
  • Safari on iOS ❌ Vendor position : neutral (concerns: security, integration)

• Memory measurement

  Limited availability

  Tags: api Groups: Performance

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Web serial

  Limited availability

  Tags: api html http

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

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android ❌
  • Edge 89 Released on 2021-03-04
  • Firefox ❌ Vendor position : neutral
  • Firefox for Android ❌ Vendor position : neutral
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• WebHID

  Limited availability

  Tags: api html http

  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 ❌
  • Edge 89 Released on 2021-03-04
  • Firefox ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• Cookie store

  Limited availability

  Tags: api

  The CookieStore interface 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 ❌ Vendor position : defer
  • Firefox for Android ❌ Vendor position : defer
  • Safari ❌ Vendor position : blocked (concerns: complexity, integration, API design)
  • Safari on iOS ❌ Vendor position : blocked (concerns: complexity, integration, API design)

• File system access

  Limited availability

  Tags: api Groups: File system access

  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 ❌
  • Edge 86 Released on 2020-10-09
  • Firefox ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌ Vendor position : oppose (concerns: security)
  • Safari on iOS ❌ Vendor position : oppose (concerns: security)

• ::marker

  Limited availability

  Tags: css Groups: CSS > Lists

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

  Baseline availability blocked since October 2020 by Safari (50 months)

  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 ❌
  • Safari on iOS ❌

• Augmented reality

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Page selectors

  Limited availability

  Tags: css Groups: CSS > Selectors Print media

  The :first, :left, and :right pseudo-classes select pages based on their position in sequence after pagination. They're often used with the page CSS property, to choose a print layout defined by the @page rule.

  Baseline availability blocked since August 2020 by Firefox (52 months)

  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 ❌
  • Firefox for Android ❌
  • Safari ≤13.1 Released before 2020-03-24
  • Safari on iOS ≤13.4 Released before 2020-03-24

• Anchors (WebXR)

  Limited availability

  Tags: api Groups: WebXR

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• font-variant-position

  Limited availability

  Tags: css Groups: CSS > Fonts > Typographic font features

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ≤72 Released before 2020-01-07
  • Firefox for Android ≤79 Released before 2020-07-28
  • Safari ≤13.1 Released before 2020-03-24
  • Safari on iOS ≤13.4 Released before 2020-03-24

• HTML media capture

  Limited availability

  Tags: api html

  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 ❌
  • Chrome Android 25 Released on 2013-02-27
  • Edge ❌
  • Firefox ❌
  • Firefox for Android 79 Released on 2020-07-28
  • Safari ❌
  • Safari on iOS 10 Released on 2016-09-13

• user-select

  Limited availability

  Tags: css Groups: CSS

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

  Baseline availability blocked since July 2020 by Safari (53 months)

  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 ❌
  • Safari on iOS ❌

• SharedArrayBuffer in WebGL

  Limited availability

  Tags: api Groups: WebGL

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

  Baseline availability blocked since July 2020 by Safari (53 months)

  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 ❌
  • Safari on iOS ❌

• Content Index

  Limited availability

  Tags: api

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

  Learn more

  • Chrome ❌
  • Chrome Android 84 Released on 2020-07-27
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Layout instability

  Limited availability

  Tags: api Groups: Performance

  The layout-shift performance entry and LayoutShift API measures the layout stability of web pages based on movements of the elements on the page.

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Trusted types

  Limited availability

  Tags: api http Groups: Security

  Trusted types allow you to lock down insecure parts of the DOM API and prevent client-side cross-site scripting (XSS) attacks.

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : support (concerns: complexity)
  • Safari on iOS ❌ Vendor position : support (concerns: complexity)

• DOM overlays for WebXR

  Limited availability

  Tags: api css Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Hit test

  Limited availability

  Tags: api Groups: WebXR

  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 ❌ Vendor position : defer
  • Firefox for Android ❌ Vendor position : defer
  • Safari ❌
  • Safari on iOS ❌

• Desynchronized WebGL canvas

  Limited availability

  Tags: api Groups: WebGL

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Desynchronized WebGL2 canvas

  Limited availability

  Tags: api

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• alignment-baseline

  Limited availability

  Tags: css Groups: CSS > Text

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

  Baseline availability blocked since March 2020 by Firefox (57 months)

  Learn more

  • Chrome ≤80 Released before 2020-02-04
  • Chrome Android ≤80 Released before 2020-02-04
  • Edge ≤80 Released before 2020-02-07
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ≤13.1 Released before 2020-03-24
  • Safari on iOS ≤13.4 Released before 2020-03-24

• baseline-shift

  Limited availability

  Tags: css Groups: CSS > Text

  The baseline-shift CSS property sets the position of an element relative to its dominant baseline.

  Baseline availability blocked since March 2020 by Firefox (57 months)

  Learn more

  • Chrome ≤80 Released before 2020-02-04
  • Chrome Android ≤80 Released before 2020-02-04
  • Edge ≤80 Released before 2020-02-07
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ≤13.1 Released before 2020-03-24
  • Safari on iOS ≤13.4 Released before 2020-03-24

• WEBGL_compressed_texture_etc WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  The WEBGL_compressed_texture_etc extension for WebGL 1.0 and 2.0 contexts adds many ETC2 and EAC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

  Baseline availability blocked since March 2020 by Firefox (57 months)

  Learn more

  • Chrome 63 Released on 2017-12-06
  • Chrome Android 63 Released on 2017-12-05
  • Edge 79 Released on 2020-01-15
  • Firefox ❌
  • Firefox for Android 51 Released on 2017-01-24
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• WEBGL_compressed_texture_etc1 WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  The WEBGL_compressed_texture_etc1 extension for WebGL 1.0 and 2.0 contexts adds the ETC1 compressed texture format to compressedTexImage2D() and compressedTexSubImage2D().

  Baseline availability blocked since March 2020 by Firefox (57 months)

  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 ❌
  • Firefox for Android 30 Released on 2014-06-10
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• Contact picker

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android 80 Released on 2020-02-04
  • Edge ❌
  • Firefox ❌ Vendor position : defer
  • Firefox for Android ❌ Vendor position : defer
  • Safari ❌
  • Safari on iOS ❌

• Background fetch

  Limited availability

  Tags: api

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position (concerns: privacy, maintenance)
  • Safari on iOS ❌ Vendor position (concerns: privacy, maintenance)

• Background sync

  Limited availability

  Tags: api

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• Battery status

  Limited availability

  Tags: api

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• 2D canvas opacity

  Limited availability

  Tags: api Groups: Canvas

  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.

  Baseline availability blocked since January 2020 by Safari (59 months)

  Learn more

  • Chrome 32 Released on 2014-01-14
  • Chrome Android 32 Released on 2014-01-15
  • Edge ≤79 Released before 2020-01-15
  • Firefox 30 Released on 2014-06-10
  • Firefox for Android 30 Released on 2014-06-10
  • Safari ❌
  • Safari on iOS ❌

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

  Limited availability

  Tags: api Groups: HTML > Media elements

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Animatable clipping paths

  Limited availability

  Tags: css Groups: Clipping, shapes and masking

  The clip-path property can be animated using CSS transitions and animations.

  Baseline availability blocked since January 2020 by Safari (59 months)

  Learn more

  • Chrome 55 Released on 2016-12-01
  • Chrome Android 55 Released on 2016-12-06
  • Edge 79 Released on 2020-01-15
  • Firefox 49 Released on 2016-09-20
  • Firefox for Android 49 Released on 2016-09-20
  • Safari ❌
  • Safari on iOS ❌

• controlslist

  Limited availability

  Tags: api html Groups: HTML > Media elements

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Customized built-in elements

  Limited availability

  Tags: api html Groups: HTML > Custom elements

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

  Baseline availability blocked since January 2020 by Safari (59 months)

  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 ❌ Vendor position : oppose
  • Safari on iOS ❌ Vendor position : oppose

• Element timing

  Limited availability

  Tags: api Groups: Performance

  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 ❌ Vendor position (concerns: venue)
  • Firefox for Android ❌ Vendor position (concerns: venue)
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Federated credentials

  Limited availability

  Tags: api Groups: Credential management

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Gyroscope

  Limited availability

  Tags: api html http Groups: Sensors

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)

• host-context

  Limited availability

  Tags: css Groups: CSS > Selectors Web Components

  The :host-context() CSS pseudo-class selects the containing element of the shadow tree in which it is used if that element or an ancestor matches the provided selector.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• 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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Keyboard lock

  Limited availability

  Tags: api

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position (concerns: compatibility, internationalization, security, integration, portability, API design, annoyance, device independence, accessibility, dependencies)
  • Safari on iOS ❌ Vendor position (concerns: compatibility, internationalization, security, integration, portability, API design, annoyance, device independence, accessibility, dependencies)

• Keyboard map

  Limited availability

  Tags: api

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• Long tasks

  Limited availability

  Tags: api Groups: Performance

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Orientation Sensor

  Limited availability

  Tags: api Groups: Sensors

  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 ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: duplication, privacy, venue, use cases, power, device independence)

• overflow-anchor

  Limited availability

  Tags: css Groups: Scrolling

  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.

  Baseline availability blocked since January 2020 by Safari (59 months)

  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 ❌
  • Safari on iOS ❌

• Page lifecycle

  Limited availability

  Tags: api

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• paint()

  Limited availability

  Tags: api css Groups: CSS

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Paint timing

  Limited availability

  Tags: api Groups: Performance

  The paint performance entry and the PerformancePaintTiming API measures the duration of "paint" (also called "render") operations as a page loads. The API measures the time to First Paint (FP) and First Contentful Paint (FCP), common metrics for perceived loading times.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Password credentials

  Limited availability

  Tags: api Groups: Credential management

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Payment handler

  Limited availability

  Tags: api Groups: Payments

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Presentation API

  Limited availability

  Tags: api html

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• registerProtocolHandler

  Limited availability

  Tags: api

  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 38 Released on 2014-10-07
  • Chrome Android ❌
  • Edge 79 Released on 2020-01-15
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• requestIdleCallback()

  Limited availability

  Tags: api

  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.

  Baseline availability blocked since January 2020 by Safari (59 months)

  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 ❌
  • Safari on iOS ❌

• resize (CSS property)

  Limited availability

  Tags: css Groups: CSS

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

  Baseline availability blocked since January 2020 by Safari on iOS (59 months)

  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 5 Released on 2011-06-21
  • Safari 4 Released on 2009-06-08
  • Safari on iOS ❌

• Save-Data

  Limited availability

  Tags: api http

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Screen capture

  Limited availability

  Tags: api html http

  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 ❌
  • Edge 79 Released on 2020-01-15
  • Firefox 33 Released on 2014-10-14
  • Firefox for Android ❌
  • Safari 13 Released on 2019-09-19
  • Safari on iOS ❌

• text-size-adjust

  Limited availability

  Tags: css

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Time-relative pseudo-selectors

  Limited availability

  Tags: css Groups: CSS > Selectors

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

  Baseline availability blocked since January 2020 by Firefox (59 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

• Vibration

  Limited availability

  Tags: api

  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 ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position : oppose (concerns: integration, use cases, portability, power, annoyance, device independence)
  • Safari on iOS ❌ Vendor position : oppose (concerns: integration, use cases, portability, power, annoyance, device independence)

• Web Bluetooth

  Limited availability

  Tags: api html http

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• WebUSB

  Limited availability

  Tags: api html http

  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 ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌ Vendor position (concerns: privacy, security, device independence)
  • Safari on iOS ❌ Vendor position (concerns: privacy, security, device independence)

• WebXR

  Limited availability

  Tags: api html http Groups: WebXR

  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 ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Gamepad (WebXR)

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• <input type="color">

  Limited availability

  Tags: html Groups: HTML > Forms HTML > HTML elements

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

  Baseline availability blocked since March 2019 by Firefox for Android (69 months)

  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 ❌
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

• Case-sensitive attribute selector

  Limited availability

  Tags: css Groups: CSS > Selectors

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 66 Released on 2019-03-19
  • Firefox for Android 66 Released on 2019-03-19
  • Safari ❌
  • Safari on iOS ❌

• WebDriver

  Limited availability

  Tags: api webdriver Groups: WebDriver

  The WebDriver interface 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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 66 Released on 2019-03-19
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Gamepad touch buttons

  Limited availability

  Tags: api Groups: Gamepad

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

  Baseline availability blocked since March 2019 by Safari (69 months)

  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 ❌
  • Safari on iOS ❌

• crisp-edges

  Limited availability

  Tags: css Groups: Images > Image scaling

  The image-rendering: crisp-edges CSS declaration scales images to preserve lines without blurring.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 65 Released on 2019-01-29
  • Firefox for Android 65 Released on 2019-01-29
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

• ::selection

  Limited availability

  Tags: css Groups: CSS > Selectors Selection

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

  Baseline availability blocked since September 2018 by Safari on iOS (75 months)

  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 ❌

• Network Information

  Limited availability

  Tags: api http

  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 67 Released on 2018-05-29
  • Chrome Android 67 Released on 2018-05-31
  • Edge ❌
  • Firefox ❌ Vendor position : negative
  • Firefox for Android ❌ Vendor position : negative
  • Safari ❌
  • Safari on iOS ❌

• ping

  Limited availability

  Tags: api html svg

  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.

  Baseline availability blocked since April 2018 by Firefox (80 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 6 Released on 2012-07-25
  • Safari on iOS 6 Released on 2012-09-10

• Payment request

  Limited availability

  Tags: api html http Groups: Payments

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

  Baseline availability blocked since April 2018 by Firefox (80 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 11.1 Released on 2018-04-12
  • Safari on iOS 11.3 Released on 2018-03-29

• speak-as

  Limited availability

  Tags: css Groups: Speech CSS

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 11.1 Released on 2018-04-12
  • Safari on iOS 11.3 Released on 2018-03-29

• WebVTT regions

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 59 Released on 2018-03-13
  • Firefox for Android 59 Released on 2018-03-13
  • Safari 7 Released on 2013-10-22
  • Safari on iOS 7 Released on 2013-09-18

• Gamepad VR hands and poses

  Limited availability

  Tags: api Groups: Gamepad

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari ❌
  • Safari on iOS ❌

• text-justify

  Limited availability

  Tags: css Groups: CSS > Text

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 55 Released on 2017-08-08
  • Firefox for Android 55 Released on 2017-08-08
  • Safari ❌
  • Safari on iOS ❌

• Pointer lock

  Limited availability

  Tags: api

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

  Baseline availability blocked since March 2017 by Safari on iOS (93 months)

  Learn more

  • Chrome 37 Released on 2014-08-26
  • Chrome Android 37 Released on 2014-09-03
  • 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 ❌

• Touch events

  Limited availability

  Tags: api

  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.

  Baseline availability blocked since March 2017 by Safari (93 months)

  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 ❌
  • Safari on iOS ≤3 Released before 2009-06-17

• cross-fade()

  Limited availability

  Tags: css Groups: Images

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 10 Released on 2016-09-20
  • Safari on iOS 9.3 Released on 2016-03-21

• inverted-colors media query

  Limited availability

  Tags: css Groups: CSS > Media queries

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari 9.1 Released on 2016-03-21
  • Safari on iOS 10 Released on 2016-09-13

• Notifications

  Limited availability

  Tags: api

  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 ❌
  • 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 ❌

• OES_texture_half_float_linear WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

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

  Baseline availability blocked since August 2016 by Firefox for Android (100 months)

  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 ❌
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

• EXT_shader_texture_lod WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 of the level of detail (LOD).

  Learn more

  • Chrome 38 Released on 2014-10-07
  • Chrome Android 38 Released on 2014-10-08
  • Edge ❌
  • Firefox 47 Released on 2016-06-07
  • Firefox for Android ❌
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

• Media source

  Limited availability

  Tags: api

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

  Baseline availability blocked since November 2015 by Safari on iOS (109 months)

  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 42 Released on 2015-11-03
  • Safari 8 Released on 2014-10-16
  • Safari on iOS ❌

• Page breaks

  Limited availability

  Tags: css Groups: CSS > Layout

  The break-after, break-before, break-inside CSS properties (along with page-break- aliases) control where printed pages start and end. Also known as pagination or page breaking.

  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 ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• WEBGL_compressed_texture_s3tc WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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 ❌
  • Edge 12 Released on 2015-07-29
  • Firefox 22 Released on 2013-06-25
  • Firefox for Android ❌
  • Safari 8 Released on 2014-10-16
  • Safari on iOS ❌

• Wheel events

  Limited availability

  Tags: api

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

  Baseline availability blocked since July 2015 by Safari on iOS (113 months)

  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 ❌

• Widows and orphans

  Limited availability

  Tags: css Groups: CSS > Layout

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

  Baseline availability blocked since July 2015 by Firefox (113 months)

  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 ❌
  • Firefox for Android ❌
  • Safari 1.3 Released on 2005-04-15
  • Safari on iOS 1 Released on 2007-06-29

• display: ruby

  Limited availability

  Tags: css Groups: CSS Ruby

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 38 Released on 2015-05-12
  • Firefox for Android 38 Released on 2015-05-12
  • Safari ❌
  • Safari on iOS ❌

• font-language-override

  Limited availability

  Tags: css Groups: CSS > Fonts > Typographic font features

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 34 Released on 2014-12-01
  • Firefox for Android 34 Released on 2014-12-01
  • Safari ❌
  • Safari on iOS ❌

• Audio and video tracks

  Limited availability

  Tags: api Groups: HTML > Media elements

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

• fastSeek()

  Limited availability

  Tags: api Groups: HTML > Media elements

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • 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

• Screen orientation lock

  Limited availability

  Tags: api

  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 ❌
  • Chrome Android 38 Released on 2014-10-08
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Custom ellipses

  Limited availability

  Tags: css

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 9 Released on 2011-12-20
  • Firefox for Android 9 Released on 2011-12-21
  • Safari ❌
  • Safari on iOS ❌

• Alternative style sheets

  Limited availability

  Tags: html Groups: CSS

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox 3 Released on 2008-06-17
  • Firefox for Android 4 Released on 2011-03-29
  • Safari ❌
  • Safari on iOS ❌

• Ambient light sensor

  Limited availability

  Tags: api html http Groups: Sensors

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• attr()

  Limited availability

  Tags: css Groups: CSS

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌
  • Safari on iOS ❌

• Device posture

  Limited availability

  Tags: api css

  The device posture API provides information about the physical posture of a device, such as whether a foldable device is folded or unfolded.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• display: contents

  Limited availability

  Tags: css Groups: CSS

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position : neutral (concerns: accessibility)
  • Safari on iOS ❌ Vendor position : neutral (concerns: accessibility)

• element()

  Limited availability

  Tags: css

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• EXT_disjoint_timer_query WebGL extension

  Limited availability

  Tags: api Groups: WebGL > WebGL extensions

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• fit-content()

  Limited availability

  Tags: css Groups: CSS > Layout

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Hanging punctuation

  Limited availability

  Tags: css

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• :has-slotted

  Limited availability

  Tags: css Groups: CSS > Selectors Web Components

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• image()

  Limited availability

  Groups: Images

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Magnetometer

  Limited availability

  Tags: api Groups: Sensors

  The Magnetometer API reads magnetic field sensor data from the device's magnetometer.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Masonry

  Limited availability

  Tags: css Groups: CSS > Layout

  Masonry is a type of CSS grid layout where the items on one of the axes are tightly packed together, like brickwork, instead of leaving gaps to align across the other axis.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position : support
  • Safari on iOS ❌ Vendor position : support

• Open and closed selectors

  Limited availability

  Tags: css Groups: CSS > Selectors

  The :open and :closed CSS pseudo-classes match elements that have open and closed states, like <details, <dialog>, or <select>, based on their state.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• overflow-clip-margin

  Limited availability

  Tags: css Groups: CSS

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• path()

  Limited availability

  Tags: css

  The path() CSS shape function creates a shape for clip-path, shape-outside, and the SVG attribute d.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• prefers-reduced-data media query

  Limited availability

  Tags: css Groups: CSS > Media queries

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌ Vendor position (concerns: privacy)
  • Safari on iOS ❌ Vendor position (concerns: privacy)

• reading-flow

  Limited availability

  Tags: css Groups: CSS

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• Rhythmic sizing

  Limited availability

  Tags: css Groups: CSS > Text

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• speak

  Limited availability

  Tags: css Groups: Speech CSS

  The speak CSS property sets whether or not text should be spoken.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Speculation rules

  Limited availability

  Tags: api html http

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Speech recognition

  Limited availability

  Tags: api Groups: Speech

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

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• stretch

  Limited availability

  Tags: css Groups: CSS > Layout

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position : positive
  • Firefox for Android ❌ Vendor position : positive
  • Safari ❌ Vendor position
  • Safari on iOS ❌ Vendor position

• :target-within

  Limited availability

  Groups: CSS > Selectors

  The :target-within CSS pseudo-class matches the element with an ID matching the URL fragment and its ancestors.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Temporal

  Limited availability

  Tags: javascript Groups: JavaScript

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌

• Memory64 (WebAssembly)

  Limited availability

  Tags: webassembly Groups: WebAssembly

  Instructions accept 64-bit memory indexes.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• WebNN

  Limited availability

  Tags: api

  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.

  Learn more

  • Chrome ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌
  • Firefox for Android ❌
  • Safari ❌
  • Safari on iOS ❌

• Layers (WebXR)

  Limited availability

  Tags: api Groups: WebXR

  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 ❌
  • Chrome Android ❌
  • Edge ❌
  • Firefox ❌ Vendor position
  • Firefox for Android ❌ Vendor position
  • Safari ❌
  • Safari on iOS ❌