Web platform release notes

• September 2024

  Mutually exclusive <details> elements

• August 2024

  color-scheme, transition-behavior

• July 2024

  Alt text for generated content, font-size-adjust, font-synthesis, Unsanitized HTML parsing methods, Registered custom properties, Relative colors, Resizable buffers

• June 2024

  Async clipboard, Gradient interpolation, Set methods, SharedArrayBuffer and Atomics

• May 2024

  light-dark(), round(), mod(), and rem(), :state(), text-wrap: balance, zoom

• April 2024

  Intl.Segmenter, Popover

• March 2024

  AbortSignal.any(), Array grouping, aspect-ratio, checkVisibility(), Promise.withResolvers(), Referrer policy, text-wrap: nowrap, Transferable ArrayBuffer, Web authentication, WebGL2, and more ...

• February 2024

  Declarative shadow DOM, tab-size, Visual viewport API

• January 2024

  Array.fromAsync(), AVIF

• December 2023

  background-clip: text, Canvas reset(), cap unit, counter-set, :dir(), pow(), sqrt(), hypot(), log(), and exp(), :has(), linear() easing, Lazy-loading images and iframes, Masks, and more ...

• November 2023

  lh unit, User activation, :user-valid and :user-invalid

• October 2023

  ARIA attribute reflection, AudioWorklet, Flexbox gap, Intl.DisplayNames, Intl.ListFormat, OfflineAudioContext, <search>, String isWellFormed() and toWellFormed(), Weak references, Web Audio, and more ...

• September 2023

  contain-intrinsic-size, @counter-style, Device orientation events, font-variant-position, Hyphenation, image-set(), <link rel="modulepreload">, Subgrid

• August 2023

  dirname, Motion path

• July 2023

  animation-composition, Array by copy, :is(), Two-value display property, :where()

• June 2023

  calc() constants, JavaScript modules in workers, window.print()

• May 2023

  color(), color-mix(), Compression streams, Conic gradients, Lab and LCH, :nth-child() of <selector>, Oklab and Oklch, WebRTC SCTP information

• April 2023

  Canvas createConicGradient(), Canvas roundRect(), Inert elements

• March 2023

  BigInt, Constructed stylesheets, Fetch metadata request headers, font-synthesis-small-caps, font-synthesis-style, font-synthesis-weight, font-variant-alternates, Form-associated custom elements, Import maps, input (event), and more ...

• February 2023

  :autofill, Container queries, String replaceAll()

• January 2023

  Grid, MathML, min(), max(), and clamp(), Opacity (SVG), Promise.allSettled(), :read-only and :read-write

• December 2022

  Small, large, and dynamic viewport units, WebGL OES_draw_buffers_indexed extension

• November 2022

  font-palette

• October 2022

  Grid animation, ic unit

• September 2022

  Inline-size containment, font-optical-sizing, Forced colors, :modal, overflow, Permissions, Web animations

• August 2022

  Array findLast() and findLastIndex(), Individual transform properties

• July 2022

  Array flat() and flatMap(), Async generators, Autonomous custom elements, <bdi>, caret-color, Style containment, Credential management, :default, <details>, <embed>, and more ...

• June 2022

  Streams

• April 2022

  HWB

• March 2022

  accent-color, appearance, Array at(), BroadcastChannel, Cascade layers, Layout containment, Paint containment, Size containment, <dialog>, :focus-visible, and more ...

• February 2022

  color-scheme

• January 2022

  font-synthesis, Scroll snap

• December 2021

  SharedArrayBuffer and Atomics

• September 2021

  Abortable fetch, AbortController and AbortSignal, aspect-ratio, Intersection observer, Referrer policy, Web authentication, WebGL2

• August 2021

  tab-size, Visual viewport API

• June 2021

  Constraint validation API

• April 2021

  AudioWorklet, Flexbox gap, Intl.DisplayNames, Intl.ListFormat, OfflineAudioContext, <output>, Promise finally(), tabindex, Weak references, Web Audio

• March 2021

  font-variation-settings, Speech synthesis

• January 2021

  :is(), :where()

• November 2020

  Array iterators, Conic gradients, JavaScript modules

• September 2020

  BigInt, Intl.Locale, Intl.RelativeTimeFormat, Promise.any(), scrollIntoView(), WebP

• August 2020

  String replaceAll()

• July 2020

  Grid, min(), max(), and clamp(), Opacity (SVG), Promise.allSettled(), :read-only and :read-write

• April 2020

  <data>, <time>, Viewport units

• March 2020

  font-optical-sizing, Intl, Media capture, Resource timing (initial support), Web animations

• January 2020

  Array flat() and flatMap(), Async generators, Autonomous custom elements, <bdi>, caret-color, Credential management, :default, <details>, <embed>, font-display, and more ...

• October 2019

  Async functions, Custom properties, font-feature-settings, String padStart() and padEnd()

• September 2019

  Classes, Clipboard events, Fetch, Intl.PluralRules, Print events, Sticky positioning

• August 2019

  Border images

• July 2019

  Scroll snap

• March 2019

  Abortable fetch, AbortController and AbortSignal, Array copyWithin(), Array fill(), Array find() and findIndex(), Array.from(), Array includes(), Array.of(), @font-face, Generators, and more ...

• December 2018

  Constraint validation API

• October 2018

  <output>, Promise finally(), tabindex

• September 2018

  font-variation-settings, <picture>, Speech synthesis

• May 2018

  Array iterators, JavaScript modules, <template>

• March 2018

  Flexbox, HTTP/2, String codePointAt() and fromCodePoint(), String includes(), String raw(), String repeat(), String startsWith() and endsWith(), @supports, 2D transforms, WeakSet

• January 2018

  <a>, <abbr>, <address>, Array (initial support), Array.isArray(), Array iteration methods, Array splice(), <article>, <aside>, <audio>, and more ...

• October 2017

  <data>, <time>, Viewport units

• September 2017

  Intl, Media capture, Resource timing (initial support)

• April 2017

  Async functions, Custom properties, font-feature-settings, String padStart() and padEnd()

• March 2017

  Classes, Clipboard events, Fetch

• February 2017

  Border images

• September 2016

  Array copyWithin(), Array fill(), Array find() and findIndex(), Array.from(), Array includes(), Array.of(), @font-face, Generators, Proxy and Reflect, String normalize(), and more ...

• March 2016

  <picture>

• November 2015

  <template>

• September 2015

  Flexbox, HTTP/2, String codePointAt() and fromCodePoint(), String includes(), String raw(), String repeat(), String startsWith() and endsWith(), @supports, 2D transforms, WeakSet

• July 2015

  <a>, <abbr>, <address>, Array (initial support), Array.isArray(), Array iteration methods, Array splice(), <article>, <aside>, <audio>, and more ...