2021-09-24

Chromium

• Changed: Reporting API: Isolate reports per-document and support the Reporting-Endpoints header

  Android	(n/a)	→	96
  Desktop	(n/a)	→	96

• Changed: App history API

  Status	In development	→	Origin trial

• Removed: Clipboard API: Svg

2021-09-23

Chromium

• Changed: CSS :autofill Pseudo Class

  Android	(n/a)	→	96
  Desktop	(n/a)	→	96

• Changed: Conditional Focus

  Desktop	96	→	(n/a)

• Changed: HTTP->HTTPS redirect for HTTPS DNS records

  Android	95	→	96
  Desktop	95	→	96

2021-09-22

Chromium

• Changed: Clipboard API: Svg

  Android	93	→	(n/a)
  Desktop	93	→	(n/a)

• Changed: HDR CSS Media Queries

  Status	No active development	→	In developer trial (Behind a flag)
  Flag	False	→	True

• Added: Conditional Focus

  Status	No active development

• Added: Region Capture

  Status	No active development

2021-09-21

Chromium

• Changed: Add FileSystemHandle::move() and FileSystemHandle::rename() methods

  Status	No active development	→	In development
  Desktop	(n/a)	→	98

• Changed: Add FileSystemHandle::Remove() method

  Status	No active development	→	In developer trial (Behind a flag)
  Flag	False	→	True
  Desktop	(n/a)	→	98

• Changed: Cross-Origin-Embedder-Policy: credentialless

  Status	Origin trial	→	Enabled by default

• Changed: EME MediaKeySession Closed Reason

  Status	No active development	→	Enabled by default
  Android	(n/a)	→	96
  Desktop	(n/a)	→	96

2021-09-20

Chromium

• Added: renderpriority attribute

  Status	No active development

2021-09-17

Chromium

• Changed: Auto-expand details elements

  Android	(n/a)	→	96
  Desktop	(n/a)	→	96

• Changed: Disable propagation of body style to viewport when contained

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False
  Android	(n/a)	→	96
  Desktop	(n/a)	→	96

• Changed: Automatically lazily load below-the-fold iframes and images for Lite Mode users

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False

• Changed: Add "matrix" to registerProtocolHandler safelisted schemes

  Status	In development	→	Enabled by default

• Changed: First-party sets

  Android	89	→	(n/a)
  Desktop	89	→	(n/a)

• Changed: Trust Token API

  Android	84	→	(n/a)
  Desktop	84	→	(n/a)

• Changed: input.rawValue

  Status	In developer trial (Behind a flag)	→	No longer pursuing
  Flag	True	→	False

• Added: CSS font-synthesis property

  Status	In development

2021-09-16

Chromium

• Changed: Progressive Web Apps as URL Handlers

  Status	In developer trial (Behind a flag)	→	Origin trial
  Flag	True	→	False

2021-09-15

Chromium

• Added: HDR CSS Media Queries

  Status	No active development

• Added: Platform Attachment in Assertion response

  Status	No active development

• Added: Web app scope extensions

  Status	No active development

2021-09-14

Chromium

• Changed: Clipboard: Preserve PNG metadata

  Android	94	→	96
  Desktop	94	→	96

• Added: Disable propagation of body style to viewport when contained

  Status	In developer trial (Behind a flag)

2021-09-13

Chromium

• Changed: WebTransport

  Android	91	→	(n/a)
  Desktop	91	→	(n/a)

2021-09-10

Chromium

• Changed: Media Source Extensions for WebCodecs

  Status	No active development	→	In developer trial (Behind a flag)
  Flag	False	→	True

• Changed: Priority Hints

  Status	In developer trial (Behind a flag)	→	Origin trial
  Flag	True	→	False
  Android	70	→	(n/a)
  Desktop	70	→	(n/a)
  Ios	70	→	(n/a)

2021-09-09

Chromium

• Changed: Multi-Screen Window Placement

  Desktop	93	→	97

• Changed: Cross-Origin-Embedder-Policy: credentialless

  Android	95	→	96
  Desktop	95	→	96

• Changed: 103 Early Hints for Navigation

  Android	91	→	(n/a)
  Desktop	91	→	(n/a)

• Changed: MSE in Workers

  Android	88	→	(n/a)
  Desktop	88	→	(n/a)

• Changed: PWA manifest unique id - desktop

  Status	In development	→	In developer trial (Behind a flag)
  Flag	False	→	True

2021-09-08

Chromium

• Changed: Deprecate and remove WebSQL in third-party contexts

  Status	Proposed	→	In development

• Changed: Private Network Access preflight requests for subresources

  Status	No active development	→	In development

• Changed: Standardize existing client hint naming

  Status	No active development	→	In development

• Changed: Origin Private File System extension: AccessHandle

  Status	In developer trial (Behind a flag)	→	Origin trial
  Flag	True	→	False
  Desktop	95	→	99

• Changed: Shared Element Transitions

  Android	92	→	97
  Desktop	92	→	97

• Changed: CSS @counter-style descriptor 'speak-as'

  Status	No active development	→	In developer trial (Behind a flag)
  Flag	False	→	True

• Changed: Clipboard: Preserve PNG metadata

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False

• Changed: Comma separator in iframe allow attribute

  Android	87	→	89
  Desktop	87	→	89

• Changed: Origin Policy

  Status	In development	→	On hold

• Added: Markup based Client Hints delegation for third-party content

  Status	Proposed

• Added: Add FileSystemHandle::move() and FileSystemHandle::rename() methods

  Status	No active development

• Removed: CORS-RFC1918: CORS restrictions on internet-to-intranet connections.

2021-09-07

Chromium

• Changed: Read Chrome device attributes

  Status	In developer trial (Behind a flag)	→	Origin trial
  Flag	True	→	False
  Desktop	90	→	98

• Changed: fetch() upload streaming

  Android	85	→	(n/a)
  Desktop	85	→	(n/a)

• Changed: preferCurrentTab

  Desktop	90	→	(n/a)

2021-09-06

Chromium

• Changed: HTMLScriptElement.supports(type) method

  Status	No active development	→	In developer trial (Behind a flag)
  Flag	False	→	True

• Changed: Deprecate the `document.domain` setter.

  Android	(n/a)	→	101
  Desktop	(n/a)	→	101

2021-09-03

Chromium

• Changed: WebAssembly Reference Types

  Android	95	→	96
  Desktop	95	→	96

• Changed: URLPattern

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False

• Changed: self.reportError()

  Status	In development	→	Enabled by default
  Android	(n/a)	→	95
  Desktop	(n/a)	→	95

2021-09-02

Chromium

• Changed: WebAssembly Exception Handling

  Android	90	→	95
  Desktop	90	→	95

• Changed: Remove SDES key exchange for WebRTC

  Status	Proposed	→	Deprecated

• Changed: Reporting API: Isolate reports per-document and support the Reporting-Endpoints header

  Status	In development	→	In developer trial (Behind a flag)
  Flag	False	→	True

• Added: The "basic-card" method of PaymentRequest API

  Status	In development

2021-09-01

Chromium

• Changed: WebAssembly Exception Handling

  Android	95	→	90
  Desktop	95	→	90

• Changed: Service Worker subresource filter

  Status	No active development	→	Origin trial
  Desktop	92	→	(n/a)

• Added: HTMLScriptElement.supports(type) method

  Status	No active development

• Added: Private Network Access preflight requests

  Status	No active development

2021-08-31

Chromium

• Changed: WritableStream controller AbortSignal

  Android	(n/a)	→	95
  Desktop	(n/a)	→	95

• Changed: Restrict "private network requests" for subresources from public websites to secure contexts.

  Status	In developer trial (Behind a flag)	→	Origin trial
  Flag	True	→	False
  Android	86	→	102
  Desktop	86	→	102

• Changed: New UA platform version source on Windows for User-Agent Client Hints

  Status	Proposed	→	Enabled by default
  Android	(n/a)	→	95
  Desktop	(n/a)	→	95

• Changed: Capability Delegation

  Android	90	→	(n/a)
  Desktop	90	→	(n/a)

• Removed: COEP for shared worker

2021-08-30

Chromium

• Changed: Deprecate support for URLs with non-IPv4 hostnames ending in numbers

  Status	No active development	→	Removed

• Changed: URLPattern

  Android	93	→	95
  Desktop	93	→	95

• Changed: WebAssembly Reference Types

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False

• Added: WritableStream controller AbortSignal

  Status	In development

• Added: COEP for shared worker

  Status	No active development

• Added: InteractionID in EventTiming

  Status	No active development

2021-08-27

Chromium

• Changed: CSS @counter-style rules in shadow trees

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False

• Changed: Idle Detection

  Android	84	→	94
  Desktop	84	→	94

• Changed: Deprecate support for URLs with non-IPv4 hostnames ending in numbers

  Android	(n/a)	→	95
  Desktop	(n/a)	→	95

• Added: self.reportError()

  Status	In development

2021-08-26

Chromium

• Changed: EyeDropper API

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False
  Desktop	(n/a)	→	95

• Changed: URL Protocol Handler Registration for PWAs

  Desktop	92	→	95

• Changed: Feature Policy: display-capture

  Desktop	90	→	94

• Added: Remove SDES key exchange for WebRTC

  Status	Proposed

2021-08-25

Chromium

• Changed: CSS @counter-style rules in shadow trees

  Android	94	→	95
  Desktop	94	→	95

• Changed: Logical properties for contain-intrinsic-size

  Status	In development	→	Enabled by default
  Android	(n/a)	→	95
  Desktop	(n/a)	→	95

• Changed: CSS @counter-style descriptor 'speak-as'

  Android	94	→	96
  Desktop	94	→	96

2021-08-24

Chromium

• Changed: WebAssembly Exception Handling

  Android	(n/a)	→	95
  Desktop	90	→	95

• Changed: WebAssembly Reference Types

  Android	(n/a)	→	95
  Desktop	78	→	95

• Changed: Align transform-style: preserve-3d and perspective property with the spec

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False
  Android	(n/a)	→	94
  Desktop	(n/a)	→	94

• Changed: JS Self-Profiling API

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False
  Android	(n/a)	→	94
  Desktop	(n/a)	→	94

• Changed: Change click, auxclick and contextmenu event types to PointerEvent

  Status	In developer trial (Behind a flag)	→	Enabled by default
  Flag	True	→	False
  Android	79	→	92
  Desktop	79	→	92

• Added: PermissionStatus.prototype.name

  Status	No active development

2021-08-23

Chromium

• Changed: Viewport-height client hint

  Status	No active development	→	In development
  Android	94	→	95
  Desktop	94	→	95

• Changed: WebGPU

  Desktop	94	→	98

• Changed: Canvas color management

  Android	92	→	94
  Desktop	92	→	94

• Changed: Idle Detection

  Status	Origin trial	→	Enabled by default

• Changed: battery-savings meta tag

  Status	In development	→	No longer pursuing

• Removed: onslotchange event handler IDL attribute

2021-08-18

WebKit (WebCore)

• Changed: CSS Selector :any-link

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :focus-within

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :is()

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :lang() level 4

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :matches()

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :not() level 4

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :nth-child(An+B of selector list) and :nth-last-child(An+B of selector list)

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Selector :placeholder-shown

  EnabledByDefault	true	→	(n/a)

• Changed: CSS Shapes Level 1

  EnabledByDefault	true	→	(n/a)

• Changed: Case-insensitive attribute selectors

  EnabledByDefault	true	→	(n/a)

• Changed: Dialog Element

  Status	Under Consideration	→	In Development

• Changed: Element.closest()

  EnabledByDefault	true	→	(n/a)

• Changed: Filter Effects backdrop-filter property

  EnabledByDefault	true	→	(n/a)

• Changed: Force Click Events

  EnabledByDefault	true	→	(n/a)

• Changed: HTML Interactive Form Validation

  EnabledByDefault	true	→	(n/a)

• Changed: ImageBitmap

  Status	Under Consideration	→	In Development

• Changed: Initial Letter

  EnabledByDefault	true	→	(n/a)

• Changed: Interaction Media Features (pointer, hover, any-pointer, any-hover)

  EnabledByDefault	true	→	(n/a)

• Changed: Position: sticky

  EnabledByDefault	true	→	(n/a)

• Changed: Readable Streams

  EnabledByDefault	true	→	(n/a)

• Changed: Resize Observer

  Status	Supported In Preview	→	Supported
  EnabledByDefault	false	→	(n/a)

• Changed: Shadow DOM

  EnabledByDefault	true	→	(n/a)

• Changed: Srcset w descriptor and related sizes attribute

  EnabledByDefault	true	→	(n/a)

• Changed: Srcset x descriptor

  EnabledByDefault	true	→	(n/a)

• Changed: Strict Mixed Content Checking

  EnabledByDefault	true	→	(n/a)

• Changed: Template Element

  EnabledByDefault	true	→	(n/a)

• Changed: Upgrade Insecure Requests

  EnabledByDefault	true	→	(n/a)

• Changed: Visual Viewport API

  Status	Supported In Preview	→	Supported

• Changed: Web Audio

  Status	Partially Supported	→	Supported

• Changed: inert attribute

  Status	Under Consideration	→	In Development

2021-07-30

WebKit (JavaScriptCore)

• Added: WebGPU

  Status	In Development

2021-07-26

WebKit (JavaScriptCore)

• Added: Temporal

  Status	In Development