Features not yet available

These web features are not yet supported across all core browsers.

• abs() and sign()

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/1407476
  • Chrome Android ❌ See crbug.com/1407476
  • Edge ❌ See crbug.com/1407476
  • 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

• Anchor positioning

  Limited availability

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

  Learn more

  • Chrome 125 Released on 2024-05-14
  • Chrome Android 125 Released on 2024-05-14
  • Edge 125 Released on 2024-05-17
  • Firefox ❌ See bugzil.la/1838746
  • Firefox for Android ❌ See bugzil.la/1838746
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Async clipboard

  Limited availability

  The navigator.clipboard API asynchronously reads and writes to the system clipboard.

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Audio session

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Audio and video tracks

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 8 Released on 2014-10-16
  • Safari on iOS 8 Released on 2014-09-17

• backdrop-filter

  Limited availability

  The backdrop-filter CSS property applies graphical effects such as blurring or color shifting to the area behind an element.

  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 103 Released on 2022-07-26
  • Firefox for Android 103 Released on 2022-07-26
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Background fetch

  Limited availability

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

  Learn more

  • Chrome 74 Released on 2019-04-23
  • Chrome Android 74 Released on 2019-04-24
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• baseline-source

  Limited availability

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

  Learn more

  • Chrome 111 Released on 2023-03-07
  • Chrome Android 111 Released on 2023-03-07
  • Edge 111 Released on 2023-03-13
  • Firefox 115 Released on 2023-07-04
  • Firefox for Android 115 Released on 2023-07-04
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• blocking="render"

  Limited availability

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

  Learn more

  • Chrome 105 Released on 2022-09-02
  • Chrome Android 105 Released on 2022-09-02
  • Edge 105 Released on 2022-09-01
  • Firefox ❌ See bugzil.la/1751383
  • Firefox for Android ❌ See bugzil.la/1751383
  • Safari ❌ See webkit.org/b/267232
  • Safari on iOS ❌ See webkit.org/b/267232

• contextlost and contextrestored

  Limited availability

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

  Learn more

  • Chrome 99 Released on 2022-03-01
  • Chrome Android 99 Released on 2022-03-01
  • Edge 99 Released on 2022-03-03
  • Firefox 125 Released on 2024-04-16
  • Firefox for Android 125 Released on 2024-04-16
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• ClipboardItem.supports()

  Limited availability

  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.

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 121 Released on 2024-01-25
  • Firefox 127 Released on 2024-06-11
  • Firefox for Android 127 Released on 2024-06-11
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Read unsanitized clipboard data

  Limited availability

  The optional formats.unsanitized parameter of the navigator.clipboard.read() method reads unsanitized 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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• COLRv1

  Limited availability

  COLRv1 is a font format that supports multi-color glyphs.

  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 ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Column breaks

  Limited availability

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

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android 102 Released on 2022-05-24
  • Edge 102 Released on 2022-05-31
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• CPU compute pressure

  Limited availability

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

  Learn more

  • Chrome 125 Released on 2024-05-14
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 125 Released on 2024-05-17
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Container style queries

  Limited availability

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

  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 ❌ See bugzil.la/1795622
  • Firefox for Android ❌ See bugzil.la/1795622
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• content-visibility

  Limited availability

  The content-visibility CSS property delays rendering an element, including layout and painting, until it is needed.

  Learn more

  • Chrome 108 Released on 2022-11-29
  • Chrome Android 108 Released on 2022-11-29
  • Edge 108 Released on 2022-12-05
  • Firefox 125 Released on 2024-04-16
  • Firefox for Android 125 Released on 2024-04-16
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• controlslist

  Limited availability

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

  Learn more

  • Chrome 58 Released on 2017-04-19
  • Chrome Android 58 Released on 2017-04-25
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• CSS import attributes

  Limited availability

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Customized built-in elements

  Limited availability

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

  Learn more

  • Chrome 67 Released on 2018-05-29
  • Chrome Android 67 Released on 2018-05-31
  • Edge 79 Released on 2020-01-15
  • Firefox 63 Released on 2018-10-23
  • Firefox for Android 63 Released on 2018-10-23
  • Safari ❌ See webkit.org/b/182671
  • Safari on iOS ❌ See webkit.org/b/182671

• <datalist>

  Limited availability

  The <datalist> element defines a set of recommended values for an <input> element. Browsers may show a dropdown menu of all options, or matching options as the user types.

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 69 Released on 2018-09-04
  • Edge 12 Released on 2015-07-29
  • Firefox 110 Released on 2023-02-14
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 12.1 Released on 2019-03-25
  • Safari on iOS 12.2 Released on 2019-03-25

• Mutually exclusive <details> elements

  Limited availability

  Multiple <details> elements which use the same name attribute are mutually exclusive. When one member of the group is opened, all other members are closed.

  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 ❌ See bugzil.la/1856460
  • Firefox for Android ❌ See bugzil.la/1856460
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• Device posture

  Limited availability

  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 ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• display animation

  Limited availability

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

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• document.caretPositionFromPoint()

  Limited availability

  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.

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox 20 Released on 2013-04-02
  • Firefox for Android 20 Released on 2013-04-02
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Document picture-in-picture

  Limited availability

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

  Learn more

  • Chrome 116 Released on 2023-08-15
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 116 Released on 2023-08-21
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• EditContext

  Limited availability

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

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Eyedropper

  Limited availability

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

  Learn more

  • Chrome 95 Released on 2021-10-19
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 95 Released on 2021-10-21
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• fastSeek()

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/648207
  • Chrome Android ❌ See crbug.com/648207
  • Edge ❌ See crbug.com/648207
  • 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

• Fetch priority

  Limited availability

  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.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• field-sizing

  Limited availability

  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 ❌ See bugzil.la/1832409
  • Firefox for Android ❌ See bugzil.la/1832409
  • Safari ❌ See webkit.org/b/264720
  • Safari on iOS ❌ See webkit.org/b/264720

• font-palette animation

  Limited availability

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

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• font-size-adjust

  Limited availability

  The font-size-adjust CSS property preserves apparent text size, regardless of the font used, by scaling fonts to the same size with respect to a specific metric, such as x-height. This can help make fallback fonts look the same size.

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox 3 Released on 2008-06-17
  • Firefox for Android 4 Released on 2011-03-29
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• font-synthesis-position

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox 118 Released on 2023-09-26
  • Firefox for Android 118 Released on 2023-09-26
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Fullscreen API

  Limited availability

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

  Learn more

  • Chrome 71 Released on 2018-12-04
  • Chrome Android 71 Released on 2018-12-04
  • Edge 79 Released on 2020-01-15
  • Firefox 64 Released on 2018-12-11
  • Firefox for Android 64 Released on 2018-12-11
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS ❌ Search for bugs Search for standards position

• Growable SharedArrayBuffer

  Limited availability

  The grow() method of a SharedArrayBuffer, constructed with the maxByteLength option, increases the size of the buffer in place.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• hidden="until-found"

  Limited availability

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

  Learn more

  • Chrome 102 Released on 2022-05-24
  • Chrome Android 102 Released on 2022-05-24
  • Edge 102 Released on 2022-05-31
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ See webkit.org/b/238266
  • Safari on iOS ❌ See webkit.org/b/238266

• Custom highlights

  Limited availability

  Custom highlights style arbitrary text ranges, without adding extra elements to 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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ See bugzil.la/1703961
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• HTML media capture

  Limited availability

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

  Learn more

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

• HTTP/3

  Limited availability

  HTTP/3 is a major revision of the HTTP network protocol, providing improved performance and efficiency by using QUIC as the underlying transport protocol.

  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 88 Released on 2021-04-19
  • Firefox for Android 88 Released on 2021-04-19
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Idle detection

  Limited availability

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

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 114 Released on 2023-06-02
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• 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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• 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 ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17 Released on 2023-09-18

• JavaScript modules in service workers

  Limited availability

  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.

  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 ❌ See bugzil.la/1360870
  • Firefox for Android ❌ See bugzil.la/1360870
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• JavaScript modules in shared workers

  Limited availability

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

  Learn more

  • Chrome 80 Released on 2020-02-04
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 80 Released on 2020-02-07
  • Firefox 114 Released on 2023-06-06
  • Firefox for Android 114 Released on 2023-06-06
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• JSON import attributes

  Limited availability

  Module import ... with { type: "json" } statements load JSON data. Also known as JSON 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 ❌ See bugzil.la/1736059
  • Firefox for Android ❌ See bugzil.la/1736059
  • Safari 17.2 Released on 2023-12-11
  • Safari on iOS 17.2 Released on 2023-12-11

• line-clamp

  Limited availability

  The line-clamp CSS property limits the text in a block container to a certain number of lines. The prefixed -webkit-line-clamp is widely supported but only works with -webkit-box-orient: vertical in combination with display: -webkit-box or display: -webkit-inline-box.

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Managed media source

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17 Released on 2023-09-18
  • Safari on iOS 17.1 Released on 2023-10-25

• margin-trim

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/40886857
  • Chrome Android ❌ See crbug.com/40886857
  • Edge ❌ See crbug.com/40886857
  • Firefox ❌ See bugzil.la/1506241
  • Firefox for Android ❌ See bugzil.la/1506241
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Masonry

  Limited availability

  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 ❌ See crbug.com/40128480
  • Chrome Android ❌ See crbug.com/40128480
  • Edge ❌ See crbug.com/40128480
  • Firefox ❌ See bugzil.la/1757446
  • Firefox for Android ❌ See bugzil.la/1757446
  • Safari ❌ See webkit.org/b/248287
  • Safari on iOS ❌ See webkit.org/b/248287

• Media element pseudo-classes

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/40748199
  • Chrome Android ❌ See crbug.com/40748199
  • Edge ❌ See crbug.com/40748199
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• Media session

  Limited availability

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

  Learn more

  • Chrome 73 Released on 2019-03-12
  • Chrome Android 57 Released on 2017-03-16
  • Edge 79 Released on 2020-01-15
  • Firefox 82 Released on 2020-10-20
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 15 Released on 2021-09-20
  • Safari on iOS 15 Released on 2021-09-20

• Media source

  Limited availability

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

  Learn more

  • Chrome 31 Released on 2013-11-12
  • Chrome Android 31 Released on 2013-11-14
  • Edge 12 Released on 2015-07-29
  • Firefox 42 Released on 2015-11-03
  • Firefox for Android 42 Released on 2015-11-03
  • Safari 8 Released on 2014-10-16
  • Safari on iOS ❌ Search for bugs Search for standards position

• Navigation API

  Limited availability

  The navigation API provides mechanisms to initiate, intercept, and manage browser navigation actions.

  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 ❌ See bugzil.la/1777171
  • Firefox for Android ❌ See bugzil.la/1777171
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Notifications

  Limited availability

  The notifications API sends system notifications to the user, often even when the page or browser is not the foreground application.

  Learn more

  • Chrome 20 Released on 2012-06-26
  • Chrome Android 42 Released on 2015-04-15
  • Edge 14 Released on 2016-08-02
  • Firefox 22 Released on 2013-06-25
  • Firefox for Android 22 Released on 2013-06-25
  • Safari 6 Released on 2012-07-25
  • Safari on iOS ❌ Search for bugs Search for standards position

• object-view-box

  Limited availability

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

  Learn more

  • Chrome 104 Released on 2022-08-02
  • Chrome Android 104 Released on 2022-08-02
  • Edge 104 Released on 2022-08-05
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• overlay

  Limited availability

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

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Page breaks

  Limited availability

  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 50 Released on 2016-04-13
  • Chrome Android 50 Released on 2016-04-13
  • Edge 12 Released on 2015-07-29
  • Firefox ❌ See bugzil.la/775617
  • Firefox for Android ❌ See bugzil.la/775617
  • Safari ❌ See webkit.org/b/34155
  • Safari on iOS ❌ See webkit.org/b/34155

• paint()

  Limited availability

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

  Learn more

  • Chrome 65 Released on 2018-03-06
  • Chrome Android 65 Released on 2018-03-06
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ See bugzil.la/1302328
  • Firefox for Android ❌ See bugzil.la/1302328
  • Safari ❌ See webkit.org/b/190217
  • Safari on iOS ❌ See webkit.org/b/190217

• Unsanitized HTML parsing methods

  Limited availability

  The Document.parseHTMLUnsafe() static method parses HTML into a DOM tree, while the setHTMLUnsafe() method of Element and ShadowRoot parses and inserts HTML into an existing tree. No sanitization applies to these methods, so never call them with user-provided HTML strings.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• Picture-in-picture (video)

  Limited availability

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

  Learn more

  • Chrome 69 Released on 2018-09-04
  • Chrome Android 105 Released on 2022-09-02
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ See bugzil.la/1463402
  • Firefox for Android ❌ See bugzil.la/1463402
  • Safari 13.1 Released on 2020-03-24
  • Safari on iOS 13.4 Released on 2020-03-24

• Pointer lock

  Limited availability

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

  Learn more

  • Chrome 37 Released on 2014-08-26
  • Chrome Android 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 ❌ Search for bugs Search for standards position

• Registered custom properties

  Limited availability

  The CSS.registerProperty() static method and the @property CSS at-rule register custom properties for which types and behaviors can be defined.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Relative colors

  Limited availability

  The from keyword for color functions (color(), hsl(), oklch(), etc.) creates a new color based on a given color by modifying the values of the input color. Also known as relative color syntax (RCS).

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• requestVideoFrameCallback()

  Limited availability

  The requestVideoFrameCallback() method for <video> schedules a function that runs with the next video frame. It is similar to requestAnimationFrame(), but for video.

  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 ❌ See bugzil.la/1800882
  • Firefox for Android ❌ See bugzil.la/1800882
  • Safari 15.4 Released on 2022-03-14
  • Safari on iOS 15.4 Released on 2022-03-14

• Resizable ArrayBuffer

  Limited availability

  The resize() method of an ArrayBuffer, constructed with the maxByteLength option, changes the size of the buffer in place.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

• Scheduler API

  Limited availability

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

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• @scope

  Limited availability

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

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• Screen orientation lock

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android 38 Released on 2014-10-08
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Scroll-driven animations

  Limited availability

  CSS scroll-driven animations are a type of CSS animations that don't run over time, but are instead driven by 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 ❌ See bugzil.la/1676779
  • Firefox for Android ❌ See bugzil.la/1676779
  • Safari ❌ See webkit.org/b/222295
  • Safari on iOS ❌ See webkit.org/b/222295

• Scroll to text fragment

  Limited availability

  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.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 16.1 Released on 2022-10-24
  • Safari on iOS 16.1 Released on 2022-10-24

• scrollbar-color

  Limited availability

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

  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 ❌ See webkit.org/b/231590
  • Safari on iOS ❌ See webkit.org/b/231590

• scrollbar-gutter

  Limited availability

  The scrollbar-gutter CSS property reserves space for the scrollbar, preventing unwanted layout changes as the scrollbar appears and disappears.

  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 97 Released on 2022-02-08
  • Firefox for Android 97 Released on 2022-02-08
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• scrollbar-width

  Limited availability

  The scrollbar-width CSS property sets the width of the scrollbar.

  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 ❌ See webkit.org/b/231588
  • Safari on iOS ❌ See webkit.org/b/231588

• scrollend

  Limited availability

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

  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 ❌ See webkit.org/b/201556
  • Safari on iOS ❌ See webkit.org/b/201556

• showPicker() for <input>

  Limited availability

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

  Learn more

  • Chrome 99 Released on 2022-03-01
  • Chrome Android 99 Released on 2022-03-01
  • Edge 99 Released on 2022-03-03
  • Firefox 101 Released on 2022-05-31
  • Firefox for Android 101 Released on 2022-05-31
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS ❌ See webkit.org/b/261703

• showPicker() for <select>

  Limited availability

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

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox 122 Released on 2024-01-23
  • Firefox for Android 122 Released on 2024-01-23
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

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

  Limited availability

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

  Learn more

  • Chrome 121 Released on 2024-01-23
  • Chrome Android 121 Released on 2024-01-23
  • Edge 121 Released on 2024-01-25
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• @starting-style

  Limited availability

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

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari 17.5 Released on 2024-05-13
  • Safari on iOS 17.5 Released on 2024-05-13

• Storage buckets

  Limited availability

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

  Learn more

  • Chrome 122 Released on 2024-02-20
  • Chrome Android 122 Released on 2024-02-20
  • Edge 122 Released on 2024-02-23
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• ::target-text

  Limited availability

  The ::target-text pseudo-element allows you to style text highlighted by a URL text fragment such as #:~:text=snippet.

  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 ❌ See bugzil.la/1694053
  • Firefox for Android ❌ See bugzil.la/1694053
  • Safari ❌ See webkit.org/b/236817
  • Safari on iOS ❌ See webkit.org/b/236817

• Temporal

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/v8/11544
  • Chrome Android ❌ See crbug.com/v8/11544
  • Edge ❌ See crbug.com/v8/11544
  • Firefox ❌ See bugzil.la/1519167
  • Firefox for Android ❌ See bugzil.la/1519167
  • Safari ❌ See webkit.org/b/223166
  • Safari on iOS ❌ See webkit.org/b/223166

• text-spacing-trim

  Limited availability

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

  Learn more

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

• text-wrap: pretty

  Limited availability

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

  Learn more

  • Chrome 117 Released on 2023-09-12
  • Chrome Android 117 Released on 2023-09-12
  • Edge 117 Released on 2023-09-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• transition-behavior

  Limited availability

  The transition-behavior: allow-discrete CSS declaration allows transitions for properties whose animation behavior is discrete. Such properties can't be interpolated and swap from their start value to the end value at 50%.

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ See bugzil.la/1805727
  • Safari 17.4 Released on 2024-03-05
  • Safari on iOS 17.4 Released on 2024-03-05

• Trusted types

  Limited availability

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• View transitions

  Limited availability

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

  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 ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• Web Bluetooth

  Limited availability

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

  Learn more

  • Chrome 70 Released on 2018-10-16
  • Chrome Android 56 Released on 2017-02-01
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ See bugzil.la/674737
  • Firefox for Android ❌ See bugzil.la/674737
  • Safari ❌ See webkit.org/b/101034
  • Safari on iOS ❌ See webkit.org/b/101034

• Web MIDI

  Limited availability

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

  Learn more

  • Chrome 43 Released on 2015-05-19
  • Chrome Android 43 Released on 2015-05-27
  • Edge 79 Released on 2020-01-15
  • Firefox 108 Released on 2022-12-13
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ See webkit.org/b/107250
  • Safari on iOS ❌ See webkit.org/b/107250

• Web NFC

  Limited availability

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

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android 89 Released on 2021-03-02
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebCodecs

  Limited availability

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

  Learn more

  • Chrome 94 Released on 2021-09-21
  • Chrome Android 94 Released on 2021-09-21
  • Edge 94 Released on 2021-09-24
  • Firefox ❌ See bugzil.la/1749044 bugzil.la/1749046 bugzil.la/1749048
  • Firefox for Android ❌ See bugzil.la/1749045 bugzil.la/1872733 bugzil.la/1749539 bugzil.la/1749044 bugzil.la/1749046 bugzil.la/1749048
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebDriver BiDi

  Limited availability

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

  Learn more

  • Chrome 106 Released on 2022-09-27
  • Chrome Android 106 Released on 2022-09-27
  • Edge 106 Released on 2022-10-03
  • Firefox 102 Released on 2022-06-28
  • Firefox for Android 102 Released on 2022-06-28
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebHID

  Limited availability

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

  Learn more

  • Chrome 89 Released on 2021-03-02
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge 89 Released on 2021-03-04
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebNN

  Limited availability

  The WebNN API constructs and executes computational graphs of neural networks by making use of the various machine learning capabilities and hardware accelerators available on the device. Also known as Web Neural Network API.

  Learn more

  • Chrome ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebRTC encoded transform

  Limited availability

  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 ❌ Search for bugs Search for Chromestatus entry
  • Chrome Android ❌ Search for bugs Search for Chromestatus entry
  • Edge ❌ Search for bugs Search for Chromestatus entry
  • 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

• WebTransport

  Limited availability

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

  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 ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebUSB

  Limited availability

  The WebUSB API exposes USB compatible devices to web pages.

  Learn more

  • Chrome 61 Released on 2017-09-05
  • Chrome Android 61 Released on 2017-09-05
  • Edge 79 Released on 2020-01-15
  • Firefox ❌ Search for bugs Search for standards position
  • Firefox for Android ❌ Search for bugs Search for standards position
  • Safari ❌ Search for bugs Search for standards position
  • Safari on iOS ❌ Search for bugs Search for standards position

• WebVTT cue alignment

  Limited availability

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

  Learn more

  • Chrome ❌ See crbug.com/633690
  • Chrome Android ❌ See crbug.com/633690
  • Edge ❌ See crbug.com/633690
  • 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

• WebVTT regions

  Limited availability

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

  Learn more

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