Web platform release notes

• September 2024

  appearance, Array at(), ::backdrop, backdrop-filter, background-attachment, BroadcastChannel, willReadFrequently, Cascade layers, Layout containment, Paint containment, and more ...

• 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

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

• April 2024

  image-rendering, Intl.Segmenter, transform-box, Vertical form controls

• March 2024

  AbortSignal.any(), Array grouping, aspect-ratio, BigInt64Array, checkVisibility(), System font, Logical properties, Promise.withResolvers(), Referrer policy, text-wrap, and more ...

• February 2024

  Declarative shadow DOM, tab-size, Visual viewport API

• January 2024

  Array.fromAsync(), AVIF

• December 2023

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

• November 2023

  Clip path boxes, lh unit, User activation, :user-valid and :user-invalid

• October 2023

  ARIA attribute reflection, AudioWorklet, ::file-selector-button, Flexbox gap, Intl.DisplayNames, Intl.ListFormat, OfflineAudioContext, Quotes, <search>, String isWellFormed() and toWellFormed(), and more ...

• September 2023

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

• August 2023

  dirname

• July 2023

  animation-composition, Array by copy, clip-path, :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, color-gamut media query, Container queries, String replaceAll()

• January 2023

  background-size, column-span, MathML, min(), max(), and clamp(), Opacity (SVG), Promise.allSettled(), :read-only and :read-write, revert

• December 2022

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

• November 2022

  font-palette

• October 2022

  Grid animation, ic unit, image-orientation

• September 2022

  Inline-size containment, font-optical-sizing, Forced colors, :modal, Motion path, overflow, overscroll-behavior, Permissions, resolution media query, Web animations

• August 2022

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

• July 2022

  all, Array flat() and flatMap(), Async generators, Async iterators and the for await..of loop, Autonomous custom elements, background-blend-mode, <bdi>, captureStream() for <canvas>, caret-color, Style containment, and more ...

• June 2022

  Streams

• May 2022

  dynamic-range media query, prefers-contrast media query

• April 2022

  HWB

• March 2022

  appearance, Array at(), ::backdrop, background-attachment, BroadcastChannel, Cascade layers, Layout containment, Paint containment, Size containment, <dialog>, and more ...

• February 2022

  color-scheme

• January 2022

  font-synthesis, Scroll snap

• December 2021

  SharedArrayBuffer and Atomics

• November 2021

  fit-content

• October 2021

  image-rendering

• September 2021

  Abortable fetch, AbortController and AbortSignal, aspect-ratio, BigInt64Array, System font, Intersection observer, Logical properties, Referrer policy, Web authentication, WebGL2

• August 2021

  tab-size, Visual viewport API

• June 2021

  Constraint validation API, Interaction media queries

• April 2021

  AudioWorklet, ::file-selector-button, Flexbox gap, Intl.DisplayNames, Intl.ListFormat, OfflineAudioContext, <output>, Promise finally(), Quotes, tabindex, and more ...

• March 2021

  font-variation-settings, Speech synthesis

• January 2021

  clip-path, :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

  background-size, column-span, min(), max(), and clamp(), Opacity (SVG), Promise.allSettled(), :read-only and :read-write, revert

• April 2020

  <data>, Grid, image-orientation, <time>, Viewport units

• March 2020

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

• January 2020

  all, Array flat() and flatMap(), Async generators, Async iterators and the for await..of loop, Autonomous custom elements, background-blend-mode, <bdi>, captureStream() for <canvas>, caret-color, Credential management, and more ...

• October 2019

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

• September 2019

  Classes, Clipboard events, column-fill, Fetch, Intl.PluralRules, Multi-column layout, Print events, Sticky positioning, writing-mode

• 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(), background-repeat, @font-face, and more ...

• December 2018

  Constraint validation API, Interaction media queries

• October 2018

  <output>, Promise finally(), tabindex

• September 2018

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

• May 2018

  Array iterators, initial, JavaScript modules, <template>

• March 2018

  Animations (CSS), Channel messaging, Flexbox, HTTP/2, String codePointAt() and fromCodePoint(), String includes(), String raw(), String repeat(), String startsWith() and endsWith(), @supports, and more ...

• January 2018

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

• October 2017

  <data>, Grid, <time>, Viewport units

• September 2017

  font-stretch, Intl, Media capture, Resource timing (initial support)

• April 2017

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

• March 2017

  Classes, Clipboard events, column-fill, Fetch, Multi-column layout, writing-mode

• February 2017

  Border images

• September 2016

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

• March 2016

  <picture>, unset

• November 2015

  initial, <template>

• September 2015

  Animations (CSS), Channel messaging, Flexbox, HTTP/2, String codePointAt() and fromCodePoint(), String includes(), String raw(), String repeat(), String startsWith() and endsWith(), @supports, and more ...

• July 2015

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