This is my selection of relevant Chromium and Firefox intents (from blink-dev and [email protected], respectively). Updated weekly.
Jump to section: Chromium | Firefox
August 2024
- 🆕 Experiment reduced
Accept-Language
header - 🆕 Ship
scheduler.yield
method - 🆕 Prototype CSS Gap Decoration
- 🆕 Prototype dynamic import maps
- 🆕 Prototype Summarizer API
- 🆕 Ship
preferInitialWindowPlacement
option for Picture-in-Picture API - Ship CSS nested declarations rules
July 2024
- Prototype HTML
handwriting
attribute - Experiment
FileSystemObserver
API - Prototype nested view transitions
- Prototype Sanitizer API
- Ship CSS
interpolate-size
property andcalc-size()
function - Ship Isolated Web Apps
- Experiment partitioning
:visited
links history (phase 2) - Prototype Selection API across Shadow DOM and
getComposedRanges
method
June 2024
- Prototype
media-playback-while-not-rendered
Permission Policy - Prototype Canvas
placeElement
method - Experiment Digital Credential API
- Prototype CSS
box-decoration-break
property (full support) - Implement and ship HTML
aria-rowindextext
andaria-colindextext
attributes - Ship
color-interpolation: linearrgb
on SVG gradients - Ship CSS
ruby-align
property - Ship
document.caretPositionFromPoint
method - Prototype
sideways-rl
andsideways-lr
keywords for the CSSwriting-mode
property - Prototype service worker auto preload
- Prototype CSS Masonry
- Experiment tabbed web apps (cont.)
May 2024
- Implement and ship line-breakable ruby (line-breaks within elements with
display: ruby
) - Prototype CSS
ruby-align
property - Ship CSS Snap Events (
scrollsnapchange
andscrollsnapchanging
) - Experiment Compression Dictionary Transport (cont.)
- Ship unrestricted WebUSB (for Isolated Web Apps with
"usb-unrestricted"
Permission Policy) - Ship CSS
anchor-scope
property - Prototype partitioned popins
- Experiment HTML
<permission>
element (Page-Embedded Permission Control) - Ship CSS
font-size-adjust
property (new syntax) - Ship alt text for the CSS
content
property (multiple arguments includingattr()
andcounter()
) - Prototype
<link rel="payment">
hints for pending push payments - Ship tabbed web apps (
tabbed
display mode) - Prototype CSS highlight pseudos for find-in-page results
- Ship View Transitions in same-origin navigation (expands API to support MPAs)
April 2024
- Prototype alt text for the CSS
content
property (multiple arguments includingattr()
andcounter()
) - Prototype Web Translation API
- Prototype Storage Access API HTTP headers
- Ship
URL.parse
static method - Ship CSS Anchor Positioning
- Prototype Web Install API
- Prototype HTML
headingstart
attribute - Ship Declarative shadow DOM serialization
- Ship CSS
round()
,mod()
, andrem()
functions - Prototype HTTP
Document-Isolation-Policy
header - Prototype CSS
::scroll-marker
and::scroll-markers
pseudo-elements - Experiment Device Posture API and Viewport Segments Enumeration API
March 2024
- Ship CSS
view-transition-class
property - Ship extending Storage Access API to non-cookie storage
- Ship HTML
writingsuggestions
attribute - Prototype Playout Statistics API for WebAudio
- Experiment
document.caretPositionFromPoint
method - Experiment extending Storage Access API to non-cookie storage (cont.)
- Experiment
tabbed
display mode for tabbed web apps (cont.) - Ship Compute Pressure API
- Ship HTML
<link rel=expect>
element for document render-blocking - Ship
pageswap
event
February 2024
- Prototype HTML
interesttarget
attribute for buttons and links - Prototype CSS
reading-order-items
property - Ship
Sec-CH-UA-Form-Factor
client hint - Experiment
<meta name="app-title">
anddocument.appTitle
(document subtitle) - Ship
clonable
option forattachShadow
method, andshadowrootclonable
attribute for<template>
element - Ship
setHTMLUnsafe
andparseHTMLUnsafe
methods - Ship HTTP
Priority
request header - Ship
picture-in-picture
value for CSSdisplay-mode
media feature - Prototype CSS functions (
@function
) - Ship
Content-Encoding: zstd
(Zstandard data compression mechanism) - Ship CSS
paint-order
property for HTML text - Prototype
picture-in-picture
value for CSSdisplay-mode
media feature - Ship ServiceWorker static routing API
- Prototype CSS
:open
and:closed
pseudo-classes - Prototype CSS
line-clamp
property - Prototype and ship CSS
zoom
property - Ship
pagereveal
event - Prototype
pageconceal
event - Prototype Web Monetization
January 2024
- Ship CSS
text-spacing-trim
property - Ship element reflection for ARIA relationship attributes
- Ship CSS
light-dark()
function - Prototype
ShadowRoot
clonable
property - Ship
navigation.activation
object - Prototype HTML
writingsuggestions
attribute - Prototype CSS
text-box-trim
andtext-box-edge
properties - Prototype delayed clipboard rendering
- Prototype CSS
view-transition-class
property (styling of view transition pseudo-elements) - Prototype Declarative shadow DOM serialization
- Prototype
document.caretPositionFromPoint
method - Implement and ship HTML
blocking=render
attribute on inline<script>
elements - Implement and ship CSS
display: contents
not affecting fosucability - Ship
'json'
and'css'
request destinations for JSON and CSS modules - Ship inheritance to CSS
::backdrop
pseudo-element from its originating element
December 2023
- Prototype CSS
calc-size()
function - Ship CSS
field-sizing
property - Prototype fenced frames with local unpartitioned data access
- Prototype Locked Mode API
- Prototype CSS
cross-fade()
function - Experiment Compute Pressure (cont.)
- Ship interoperable
mousemove
default action
November 2023
- Ship auto sizes for lazy-loaded images
- Ship multiple readers/writers in File System Access API
- Ship
unsanitized
option for thenavigation.clipboard.read
method - Experiment ServiceWorker Static Routing API (cont.)
- Experiment Element Capture
- Ship improved CSS masking for SVG
- Trial HTML
<permission>
element (Page-Embedded Permission Control) - Experiment
fetchLater
method - Ship conditional
@import supports()
rules - Ship Storage Buckets API
- Prototype
snapchanging
event (CSS scroll snap) - Ship HTTP
Speculation-Rules
header - Prototype
navigation.activation
object - Ship animation behavior for the CSS
font-palette
property - Ship
contentVisibilityAuto
option forcheckVisibility
method - Prototype passkeys in cross-origin iframes
- Deprecate and remove third-party cookies
- Prototype CSS
@page
margin boxes - Prototype
contentVisibilityAuto
option forcheckVisibility
method
October 2023
- Ship
EditContext
API - Ship CSS
::spelling-error
and::grammar-error
pseudo-elements, andspelling-error
andgrammar-error
values fortext-decoration-line
- Ship inheritance for the CSS
::selection
and::highlight
pseudo-elements - Ship CSS
mask-*
properties - Ship Permissions policy violation reports
- Ship WebGPU on Android
- Experiment extending Storage Access API to non-cookie storage
- Ship
ruby
,ruby-base
, andruby-text
values for CSSdisplay
property - Ship CSS
scrollbar-color
andscrollbar-width
properties - Ship CSS
<transform-function>
and<transform-list>
syntax for registered custom properties - Prototype Web Printing API
- Ship CSS
pow()
,sqrt()
,hypot()
,log()
, andexp()
functions - Prototype Invokers
- Prototype and ship
URL.canParse
method - Experiment
peformance.measureUserAgentSpecificMemory
method - Experiment web app manifest
"scope_extensions"
member - Experiment HTTP
Priority
request header - Ship CSS
:dir()
pseudo-class - Ship relaxed CSS Nesting
- Implement and ship video
<source media>
attribute - Ship
HTMLSelectElement
showPicker
method - Ship CSS
<image>
syntax for registered custom properties - Prototype CSS Masking
- Prototype extending Storage Access API to non-cookie storage
September 2023
- Prototype Face Framing API
- Prototype Observable API
- Prototype
firstrender
event - Prototype Device Bound Session Credentials (DBSC)
- Ship Intersection Observer
scrollMargin
property - Ship accordion pattern using
name
attribute on<details>
elements - Ship Close Watchers
- Experiment
fullscreen
option forwindow.open
method - Prototype HTML
exportid
attribute (exporting IDs from shadow roots for cross-root ARIA) - Ship
<hr>
elements inside<select>
elements - Implement and ship feature detection for supported clipboard formats
- Prototype
showPicker
method for HTML<select>
elements - Ship TLS Encrypted Client Hello (ECH)
- Prototype and ship
xywh()
andrect()
for CSSclip-path
property - Prototype CSS
dynamic-range-limit
property - Prototype Intersection Observer
scrollMargin
property - Experiment partitioning
:visited
links history - Experiment HTTP
Speculation-Rules
header (cont.) - Prototype HTTP
Sec-CH-UA-Form-Factor
Header (client hint) - Prototype Web Preferences API
August 2023
- Ship CSS Relative Color Syntax (
from
keyword) - Prototype CSS
form-sizing
property - Ship HTTP
Sec-CH-Prefers-Reduced-Transparency
header (client hint) - Ship CSS
word-break: auto-phrase
value (more natural line breaking for Japanese) - Prototype HTML
<permission>
element (Page-Embedded Permission Control) - Ship CSS
:user-valid
and:user-invalid
pseudo-classes - Ship CSS
scripting
media feature - Prototype CSS
text-spacing-trim
property - Prototype CSS Sticky State Container Queries (
stuck
) - Prototype CSS
scripting
media feature - Implement and ship
crossorigin
attribute for SVG<image>
and<feImage>
elements - Ship
hasUAVisualTransition
property forpopstate
andnavigate
events - Prototype
snapchanged
event - Ship HTML
<search>
element - Deprecate Sanitizer API (initial impl.)
- Prototype HTML
blocking="render"
attribute - Ship wertical writing modes (
vertical-rl
,vertical-lr
) for form control elements - Prototype and ship
<geometry-box>
in CSSclip-path
property value - Ship CSS
cap
andrcap
units - Ship Storage Access API with prompts
- Ship CSS logical values for
float
,clear
, andresize
properties
July 2023
- Experiment ServiceWorker Static Routing API
- Prototype CSS
inverted-colors
media feature - Prototype
fetchLater
method - Ship CSS
prefers-reduced-transparency
media feature - Prototype HTTP
Sec-CH-Prefers-Reduced-Transparency
header - Prototype and ship HTTP
Clear-Site-Data: "*"
header (clear all storage targets) - Experiment web app manifest
"tab_strip"
member and"display_override": ["tabbed"]
(tabbed web apps) - Prototype Element Capture
- Experiment
Content-Encoding: zstd
(Zstandard data compression mechanism) - Prototype CSS
text-autospace
property - Ship back/forward cache (BFCache) for pages with HTTP
Cache-control: no-store
header - Prototype CSS
prefers-reduced-transparency
media feature - Prototype CSS
font-variant-emoji
property - Ship
stroke-box
,content-box
, andborder-box
values for CSStransform-box
property - Prototype CSS
word-break: auto
value (more natural line breaking for Japanese) - Ship NotRestoredReasons API (back/forward cache)
June 2023
- Ship Permissions Policy
"unload"
feature - Prototype partitioning
:visited
links history - Prototype Storage Access API with prompts
- Prototype
FileSystemObserver
API - Ship CSS
text-wrap: pretty
keyword - Ship Shared Storage API
- Ship CSS
@starting-style
rule - Prototype
Content-Encoding: zstd
(Zstandard data compression mechanism) - Ship Fenced Frames
- Ship CSS subgrid layout
- Experiment EditContext API
- Ship
customElements.getName
method - Prototype
customElements.getName
method - Experiment
scheduler.yield
method - Ship Document Picture-in-Picture
- Prototype DOM Parts
- Prototype ServiceWorker Static Routing API
May 2023
- Prototype auto sizes for lazy-loaded images
- Ship CSS
@scope
rule - Experiment
'long-animation-frame'
performance entry type - Trial web app manifest
"scope_extensions"
member - Deprecate Mutation Events
- Ship CSS Motion Path
- Deprecate
unload
event - Trial Pending Beacon API (cont.)
- Prototype CSS
scroll-start
property - Prototype Exclusive Accordion using
<details>
elements - Ship boolean context style container queries
April 2023
- Ship scroll-driven animations
- Experiment Storage Buckets API
- Ship keyboard-focusable scroll containers
- Experiment Compute Pressure
- Ship CSS
overlay
property - Ship multi-keyword values for the CSS
display
property - Trial Controlled Frame API for Isolated Web Apps
- Prototype CSS
display
property (new two-value syntax) - Trial fullscreen popup windows
- Ship partitioned storage, service workers, and communication APIs in third-party contexts
- Trial
scheduler.yield
method - Ship Local Network Access
March 2023
- Implement and ship RegExp
v
flag for HTMLpattern
attribute - Ship
scrollend
event type - Prototype Document Subtitle (
<meta name="subtitle">
anddocument.subtitle
) - Prototype CSS
font-size-adjust
property (new syntax) - Ship
requestStorageAccessFor
method for First-Party Sets - Ship Storage Access API within First-Party Sets
- Ship First-Party Sets
- Prototype animation behavior for the CSS
font-palette
property - Ship CSS
:lang
pseudo-class - Ship CSS transitions of discrete properties
- Ship CSS
display
andcontent-visibility
in animations - Ship Popover API
- Prototype Popover API
popover=hint
attribute value - Prototype CSS
text-box-trim
property - Prototype Screen-Capture Mouse Events
February 2023
- Ship CSS
text-wrap
property - Ship CSS
overflow-inline
andoverflow-block
media features - Ship CSS
linear()
easing function - Ship CSS
update
media feature - Ship CSS
font-variant-position
property - Prototype CSS
linear()
easing function - Experiment service worker fetch fast-path for main resources
- Trial Popover API (cont.)
- Prototype CSS
text-wrap: balance
keyword - Prototype CSS
top-layer
property - Prototype CSS
:initial
pseudo class - Prototype Permissions Policy
"battery"
token
January 2023
- Prototype Controlled Frame API for Isolated Web Apps
- Ship CSS
animation-composition
property - Prototype CSS
user-select: contain
keyword - Experiment Permission Policy
unload
permission (cont.) - Ship expanded CSS
font
shorthand - Ship updated
<dialog>
initial focus algorithm - Ship View Transitions for single-page apps
- Ship streaming declarative shadow DOM
- Ship CSS Nesting
- Experiment Back/forward cache NotRestoredReason API (cont.)
- Prototype CSS
abs()
andsign()
functions - Ship selector argument in CSS
:nth-child()
and:nth-last-child()
pseudo-classes (An+B of S
) - Ship CSS
baseline-source
property - Prototype WebXR Front-facing Camera API
- Experiment Document Picture-in-Picture
- Ship CSS
rex
,rch
,ric
, andrlh
units - Prototype HTTP
Priority
request header - Prototype fullscreen popup windows (for Multi-Screen Window Placement)
December 2022
- Trial Compute Pressure
- Trial WebGPU (cont.)
- Prototype Gamepad multitouch extension
- Ship WebGPU
- Ship CSS container style queries for custom properties
- Ship CSS trigonometric functions (
sin()
,cos()
,tan()
,asin()
,acos()
,atan()
,atan2()
) - Prototype CSS
baseline-source
property - Prototype streaming declarative shadow DOM
- Trial Popover API (cont.)
- Prototype CSS Transitions on specified discrete properties
- Prototype
PointerEvent
deviceId
property for mult-pen inking - Prototype HTTPS Upgrade
- Ship CSS
font-variant-alternates
property and@font-feature-values
rule - Prototype Additional Windowing Controls
- Trial First-Party Sets
- Prototype CSS
display
andcontent-visibility
in animations - Ship Network State Partitioning
- Trial Pending Beacon API (cont.)
- Ship IDNA 2008 in Non-Transitional Mode for URL processing
November 2022
- Ship CSS
initial-letter
property - Experiment CSS
initial-letter
property - Ship Permission Policty
web-share
permission - Prototype inactive document invalidation API (for invalidating documents from BFCache or prerendering)
- Prototype Incoming Call Notifications
- Prototype WebSockets over HTTP/3
- Prototype View Transitions for single-page apps
- Experiment web app manifest
"user_preferences"
field (allows specifying dark mode colors) (updated)
October 2022
- Prototype
scheduler.yield
method - Ship anonymous iframes
- Prototype HTTP
Speculation-Rules
header - Experiment reduced information in HTTP
Accept-Language
header andnavigator.languages
property - Ship CSS
hyphenate-limit-chars
property - Experiment Back/forward cache NotRestoredReason API
- Ship Web App Launch Handling (
"launch_handler"
) - Ship Cookies Having Independent Partitioned State (CHIPS)
- Prototype
URLPatternList
- Ship CSS
color()
andcolor-mix()
functions, and other Color Level 4 additions - Prototype CSS
hyphenate-limit-chars
property - Prototype CSS
initial-letter
property - Ship CSS
lh
unit - Ship same-site (cross-origin) prerendering triggered by the speculation rules API
- Ship Conditional Focus
- Trial Page Unload Beacon API (
PendingBeacon
) - Trial partitioning Storage, Service Workers, and Communication APIs
- Ship
last baseline
alignment for flex/grid items - Ship Federated Credential Management API (was WebID)
- Experiment Private Aggregation API
- Experiment Network State Partitioning
- Prototype CSS Nesting
September 2022
- Implement and ship
TrustedHTML
fromLiteral
method - Ship
URLPattern
ignoreCase
option - Ship CSS small, large, dynamic, and logical viewport units
- Ship Origin Private File System on Android
- Prototype Web Smart Card API
- Ship CSS
@supports font-tech()
and@supports font-format()
rules - Experiment Permission Policy
unload
permission - Ship WebAuthn Conditional UI
- Experiment Conditional Focus (cont.)
- Trial WebAuthn Conditional UI
- Prototype
last baseline
alignment for flex/grid items - Ship HTTP
Sec-CH-Prefers-Reduced-Motion
header (client hint) - Ship variations in COLRv1
- Prototype CSS
lh
unit - Trial Permission Policy
unload
permission - Prototype Bounce Tracking Mitigations
- Prototype same-site (cross-origin) prerendering triggered by the speculation rules API
- Ship HTML
aria-brailleroledescription
andaria-braillelabel
attributes
August 2022
- Ship
tech()
function for CSS@font-face
src
descriptor - Ship
AudioContext
setSinkId
method - Prototype Scoped Custom Element Registries
- Implement and ship rich PWA installation dialogs (description and screenshots) on desktop
- Ship same-origin prerendering triggered by the speculation rules API on desktop
- Experiment TLS Encrypted Client Hello (ECH)
- Ship
contentvisibilityautostatechanged
event - Experiment Cookies Having Independent Partitioned State (CHIPS) (cont.)
- Prototype
requestStorageAccessForSite
API - Ship CSS
ic
unit - Experiment Pop-Up API (HTML
popup
attribute) - Experiment Web App Launch Handling (cont.)
- Prototype and ship Client Hints in Android WebView
- Experiment LazyEmbeds (cont.)
July 2022
- Prototype
URLPattern
ignoreCase
option - Experiment Cross-Origin-Opener-Policy
restrict-properties
value - Experiment anonymous iframes
- Prototype
borderless
display mode for installed web apps on desktop - Trial WebGPU (cont.)
- Ship
NavigateEvent
scroll
method - Experiment web app manifest
"user_preferences"
field (allows specifying dark mode colors) (cont.) - Prototype Custom Highlight API pointer events
- Ship
fetch()
upload streaming - Prototype
contentvisibilityautostatechanged
event - Ship CSS
overflow
property for replaced elements
June 2022
- Ship Viewport Height Client Hint (
Sec-CH-Viewport-Height
) - Ship
import.meta.resolve
function - Prototype
renderBlockingStatus
property for performance resource entries - Ship MathML
- Prototype CSS
overflow
property for replaced elements - Prototype
requestPermission
function forDeviceOrientationEvent
andDeviceMotionEvent
- Experiment LazyEmbeds
- Prototype CSS trigonometric functions (
sin()
,cos()
,tan()
,asin()
,acos()
,atan()
,atan2()
) - Ship Picture-in-Picture on Android
- Experiment Declarative Beacon API (
PendingBeacon
) - Experiment Shared Storage API
- Experiment Web App Launch Handling (
"launch_handler"
member) (cont.) - Experiment Shared Element Transitions
- Ship Custom Highlight API
- Prototype CSS
:lang()
pseudo-class level 4 extension (argument lists and language range matching) - Prototype wide-gamut colors in CSS
- Ship Sanitizer API (initial impl.)
May 2022
- Prototype tabbed web apps (
tabbed
display mode) - Prototype Origin-Bound Cookies
- Ship CSS
:modal
pseudo-class - Experiment Cookies Having Independent Partitioned State (CHIPS) (cont.)
- Trial subresource loading with Web Bundles (cont.)
- Ship HTML
blocking=render
attribute for<link>
and<script>
elements - Ship CSS
object-view-box
property - Ship CSS
:has()
pseudo-class - Experiment HTML
focusgroup
attribute - Prototype CSS Anchor Positioning
- Prototype Permission Policy
unload
feature - Ship CSS Container Queries
- Prototype NotRestoredReason API (back/forward cache)
- Prototype
PendingBeacon
API - Prototype Private Aggregation API
- Ship
Element
isVisible
method - Ship HTML
<form rel>
attribute - Prototype and ship CSS
overflow-clip-margin: <visual-box>
values - Experiment web app manifest
"user_preferences"
field (cont.)
April 2022
- Experiment Fenced Frames
- Experiment Web App Launch Handling (incl.
web app manifest "launch_handler"
member) (cont.) - Prototype
Element
isVisible
method - Trial HTML
focusgroup
attribute - Ship
AbortSignal.timeout static
method - Ship Permissions Policy
"gamepad"
token - Ship same-origin prerendering triggered by the speculation rules API
- Implement and ship Fullscreen Capability Delegation
- Ship HTTP status code
103 Early Hints
on navigation responses - Prototype and ship Permissions Policy
"bluetooth"
token - Prototype Isolated Web Apps
- Ship
SerialPort
forget
method - Ship Navigation API
- Ship subresource loading with Web Bundles
- Ship Media Queries Level 4 syntax and evaluation (incl. range context)
- Ship Speculation Rules
- Prototype CSS Toggles
- Ship File Handling (web app manifest
"file_handlers"
field - Ship Local Font Access API
- Experiment HTTP
Sec-CH-Viewport-Height
header (viewport height client hint) - Experiment Network State Partitioning (cont.)
- Experiment same-origin prerendering triggered by the speculation rules API (cont.)
March 2022
- Experiment Attribution Reporting
- Prototype CSS
@scope
at-rule - Prototype NotRestoredReason API (related to back/forward cache)
- Prototype Range API
innerText
property andadjust
method - Ship sync Access Handles for Origin Private File System
- Trial WebGPU (cont.)
- Experiment Federated Credentials Management (cont.)
- Ship HTML
hidden=until-found
attribute andbeforematch
event - Prototype and ship CSS
font-palette
property and@font-palette-values
at-rule - Ship Capture Handle
- Ship
Sec-CH-Save-Data
client hint - Prototype CSS
object-view-box
andobject-overflow
properties - Ship Priority Hints (HTML
fetchpriority
attribute, andpriority
option forfetch
)
February 2022
- Prototype Topics API
- Ship
USBDevice
forget
method - Ship Multi-Screen Window Placement
- Ship autofill in shadow DOM
- Trial Federated Credential Management API (was WebID)
- Ship omnibox prerendering
- Deprecate and remove
Event
path
method - Ship
HIDDevice
forget
method - Ship CSS
hwb()
color function - Ship Network State Partitioning
- Experiment Cookies Having Independent Partitioned State (CHIPS)
January 2022
- Prototype Notification API for Confirmation of Action
- Implement overlay scrollbars on Windows (Microsoft Fluent Design System)
- Prototype
AbortSignal.timeout
static method - Experiment Speculation Rules (cont.)
- Ship Web NFC
makeReadOnly
method (for locking NFC tags) - Prototype Document Picture-in-Picture
- Prototype CSS subgrid layout
- Experiment Storage Foundation API (cont.)
- Experiment AccessHandle for File System Access API (cont.)
- Ship CSS
mix-blend-mode: plus-lighter
value - Prototype HTML
focusgroup
attribute - Prototype service worker registration
id
property - Ship Handwriting Recognition API
December 2021
- Experiment Handwriting Recognition API (cont.)
- Prototype CSS
mix-blend-mode: plus-lighter
value - Experiment same-origin prerendering triggered by the speculation rules API (cont.)
- Ship
HTMLInputElement
showPicker
method - Ship CSS
@layer
rule (Cascade Layers) - Ship Handwriting Recognition API
- Experiment web app manifest
"user_preferences"
field (allows specifying dark mode colors) - Prototype Machine Learning Model Loader API
- Prototype Web Neural Network API
- Prototype mirroring the web page on a secondary display via the Presentation API
November 2021
- Prototype High Dynamic Range (HDR) content in
<canvas>
- Prototype dark mode colors in web app manifest
- Ship pickling for Async Clipboard API
- Prototype HTML
blocking=render
attribute for<link>
and<script>
elements - Ship
'popup'
option (window feature) forwindow.open()
- Ship
AudioContext
outputLatency
property - Prototype Fragment Directive API (for scroll-to-text)
- Prototype
HTMLInputElement
showPicker
method - Trial WebGPU (cont.)
October 2021
- Prototype and ship
structuredClone
function - Ship CSS
forced-color-adjust: preserve-parent-color
value - Ship
auto
keyword for CSScontain-intrinsic-size
property - Ship
only
keyword for CSScolor-scheme
property - Trial subresource loading with Web Bundles (cont.)
- Experiment web app manifest
"launch_handler"
member - Prototype web app manifest
"translations"
member - Ship CSS
dynamic-range
andvideo-dynamic-range
media features (HDR) - Ship Window Controls Overlay for Installed Desktop Web Apps
- Trial WebTransport over HTTP/3 (cont.)
- Ship COLRv1 Color Gradient Vector Fonts
- Ship CSS
translate
,scale
, androtate
properties (individual transforms) - Implement and ship
keyboard-map
feature policy - Ship updated Canvas 2D API
- Ship
sec-ch-
on all Client Hints - Ship App Icon Shortcuts Menu on Mac and Linux
- Experiment
only
keyword for CSScolor-scheme
property - Experiment HTTP status code
103 Early Hints
on navigation responses (cont.) - Ship CSS
font-synthesis
property - Implement and ship no preflight for requests with simple
Range
header values - Prototype web app manifest
"scope_extensions"
field - Prototype web app manifest
"handle_links"
field
September 2021
- Ship WebTransport over HTTP/3
- Ship URL Protocol Handler Registration for PWAs
- Experiment Storage Foundation API (cont.)
- Ship web app manifest
"id"
field - Experiment App History API
- Ship
HTMLScriptElement
supports
method - Experiment Trust Token API (cont.)
- Experiment
FocusableMediaStreamTrack
subclass (Conditional Focus) - Prototype
FocusableMediaStreamTrack
subclass (Conditional Focus) - Prototype HTML
renderpriority
attribute - Prototype CSS
font-synthesis
property - Ship auto-expanding
<details>
elements - Ship
speak-as
descriptor for CSS@counter-style
rule - Experiment Priority Hints
- Trial updated Canvas 2D API (cont.)
- Experiment Speculation Rules (
<script type="speculationrules">
) (cont.) - Experiment HTML
importance
attribute (Priority Hints) (cont.) - Trial web app manifest
"id"
field - Trial
HTMLScriptElement
supports
method - Prototype
HTMLScriptElement
supports
method
August 2021
- Ship
URLPattern
API - Experiment Shared Element Transitions (cont.)
- Ship
reportError
function - Experiment Declarative Link Capturing for PWAs (cont.)
- Experiment Handwriting Recognition API (cont.)
- Experiment Capture Handle (cont.)
- Ship back-forward cache (BFCache) on desktop
- Trial subresource loading with Web Bundles (cont.)
- Experiment same-origin prerendering triggered by the Speculation Rules API
- Ship Custom Highlight API
- Ship EyeDropper API
- Prototype CSS
math
generic font family - Trial AccessHandle for File System Access API
- Prototype CSS Cascade Layers
- Prototype AccessHandle for File System Access API
- Ship CSS
prefers-contrast
media feature - Prototype Web App Launch Handling (
"launch_handler"
member)
July 2021
- Ship JS Self-Profiling API
- Ship Idle Detection API
- Ship Virtual Keyboard API
- Experiment HTTP
Service-Worker-Subresource-Filter
header - Ship
preferCurrentTab
option forgetDisplayMedia
method (Screen Capture) - Ship
display-capture
permission - Experiment
URLPattern
API - Prototype
speak-as
descriptor for CSS@counter-style
rule - Ship CSS
@counter-style
rules in shadow trees - Experiment Window Controls Overlay for Installed Desktop Web Apps
- Experiment Device Attributes API
- Ship CSS
scrollbar-gutter
property - Ship Web App Manifest
"note_taking"
field - Experiment Conversion Measurement API (cont.)
- Experiment reduced
User-Agent
string - Experiment Progressive Web Apps as URL Handlers
- Ship Prioritized Task Scheduling (
scheduler.postTask
method) - Prototype Cookies Having Independent Partitioned State (CHIPS)
- Prototype Shared Storage API
June 2021
- Experiment Multi-Screen Window Placement
- Experiment Virtual Keyboard API
- Ship cross-device support for Web OTP API
- Ship
supports <font-technology>
for the CSSsrc
descriptor - Ship WebCodecs
- Prototype nad ship
<meta name="theme-color" media>
attribute - Prototype Web App Manifest
"id"
field - Ship HTTP
Sec-CH-Prefers-Color-Scheme
header (Client Hints) - Ship Canvas color management (
colorSpace
option for canvas context) - Ship CSS
accent-color
property - Ship CSS module scripts
- Experiment URL Protocol Handler Registration for PWAs
- Prototype and ship
AbortSignal
abort
static method - Experiment WebCodecs (cont.)
- Implement and ship CSS
:autofill
pseudo-class
May 2021
- Experiment Speculation Rules (
<script type="speculationrules">
) - Prototype and ship
noplaybackrate
token for the HTML media elementcontrolslist
attribute - Experiment HTML
aria-touchpassthrough
attribute - Prototype anonymous iframes
- Experiment HTTP status code
103 Early Hints
on navigation responses - Prototype HTTP
Sec-CH-Prefers-Color-Scheme
header (Client Hints) - Experiment
fetch()
upload streaming (cont.) - Prototype Pickling for Async Clipboard API
- Prototype CSS
:has()
pseudo-class - Experiment Storage Foundation API (cont.)
- Experiment Capture Handle
- Prototype Capture Handle
- Experiment Shared Element Transitions
- Ship CSS
size-adjust
descriptor - Experiment Digital Goods API (cont.)
- Ship EXIF-based intrinsic image sizing
- Ship
crypto.randomUUID
method - Experiment Idle Detection API (cont.)
- Experiment Compute Pressure API
- Experiment WebGPU
April 2021
- Prototype Fenced Frames (for ads)
- Experiment First-Party Sets and
SameParty
cookie attribute (cont.) - Experiment back-forward cache on desktop
- Experiment Trust Token API (cont.)
- Experiment updated Canvas 2D API
- Prototype HTTP
Service-Worker-Subresource-Filter
header - Implement and ship tainted origin flag for fetch requests
- Experiment Network State Partitioning
- Implement and ship CSS
:playing
and:paused
pseudo-classes - Experiment WebTransport over HTTP/3
- Prototype CSS
contain-intrinsic-size: auto
value - Ship imperative slot distribution API (Shadow DOM)
March 2021
- Ship Managed Configuration API
- Prototype Compute Pressure
- Prototype JPEG XL image format
- Ship HTML
inert
attribute - Ship cross-origin iframe support in Web OTP API
- Experiment File Handling API
- Prototype Web App Manifest
"note_taking"
and"new_note_url"
fields - Prototype Lock Screen API
- Experiment Sanitizer API
- Ship
GravitySensor
API - Experiment Handwriting Recognition API
- Experiment WebCodecs (cont.)
- Prototype and ship standard JavaScript modules in service workers
- Experiment subresource loading with Web Bundles
- Ship HTTP
Critical-CH
response header - Implement and ship HTML
<link rel="icon" media>
attribute - Experiment Federated Learning of Cohorts (FLoC)
- Prototype App History API
- Prototype
document.prerendering
property
February 2021
- Ship CSS
advance-override
descriptor - Ship CSS
@counter-style
at-rule - Prototype HTTP status code
103 Early Hints
on navigation responses - Ship Declarative Shadow DOM
- Prototype Speculation Rules
- Ship files on the clipboard
- Prototype Custom Highlight API
- Experiment Storage Foundation API
- Experiment First-Party Sets and
SameParty
cookie attribute - Prototype CSS
accent-color
property - Experimenrt QuicTransport (cont.)
- Ship stricter mixed content check for
blob:
andfilesystem:
URLs - Prototype MulticastReceiver API
- Experiment Declarative Link Capturing for PWAs (
"capture_links"
member for web app manifest)
January 2021
- Ship CSS
:focus-visible
in the user-agent style sheet - Ship
signal
option foraddEventListener
method (AbortSignal) - Prototype Multi-Screen Window Placement
- Prototype Multi Apps
- Prototype ARIA Virtual Content
- Prototype
GravitySensor
API - Prototype COLRv1 Color Gradient Vector Fonts
- Implement and ship
StaticRange
constructor - Experiment Idle Detection API (cont.)
- Prototype HTML
<popup>
element - Implement and ship smooth interpolation when animating the CSS
aspect-ratio
property - Experiment
scheduler.postTask
method for main-thread scheduling (cont.) - Prototype
SameParty
cookie attribute - Experiment
fetch()
upload streaming - Experiment Declarative Shadow DOM (cont.)
- Experiment Conversion Measurement API (cont.)
- Prototype CSS
::spelling-error
and::grammar-error
pseudo-elements, andspelling-error
andgrammar-error
values fortext-decoration-line
- Ship
performance.measureMemory
method - Spec, implement and ship persistent guaranteed-invalid CSS variables
- Implement Web Share API on macOS
December 2020
- Ship CSS
filter
property for SVG elements (filter functions) - Implement and ship CSS
:link
,:visited
, and:any-link
pseudo selectors for<link>
elements - Prototype Declarative Link Capturing for PWAs (
"capture_links"
member for web app manifest) - Prototype EyeDropper API
- Ship Web NFC
- Prototype well-specified prerendering
- Prototype
infinity
andNaN
values in CSScalc()
- Prototype and ship CSS
::file-selector-button
pseudo-element - Ship Import Maps
- Ship Byte Streams (Streams API)
- Ship Web Serial API
- Prototype Canvas Formatted Text
- prototype and ship CSS
border-start-start-radius
,border-start-end-radius
,border-end-start-radius
, andborder-end-end-radius
properties - Ship potentially trustworthy
data:
URLs - Ship Web App Manifest
"display_override"
field - Ship CSS
overflow: clip
value andoverflow-clip-margin
property - Ship WebHID
- Ship
disclosure-open
anddisclosure-closed
keywords for the CSSlist-style-type
property - Ship CSS
list-style-type
and::marker
support on<summary>
element
November 2020
- Prototype Screen Fold API
- Prototype Handwriting Recognition API
- Prototype
"display-capture"
permission - Experiment
beforematch
event and CSScontent-visibility: hidden-matchable
value (cont.) - Ship CSS
::target-text
pseudo-element - Experiment WebCodecs (cont.)
- Prototype Shared Element Transitions
- Ship Origin Isolation
- Prototype
signal
option foraddEventListener
method (AbortSignal) - Prototype CSS
@counter-style
at-rule - Experiment HTML
<meta name="battery-savings">
tag (cont.) - Prototype Container Queries
- Ship
click
,contextmenu
, andauxlick
as instances ofPointerEvent
October 2020
- Prototype NativeIO storage API
- Prototype WebXR Hand Input module
- Ship implicit
rel="noopener"
for<a target="_blank">
elements - Prototype Capability Delegation
- Prototype byte streams for Streams API
- Implement and ship selector lists in CSS
:not()
pseudo-class - Experiment Trust Token API (cont.)
- Prototype URL pattern matching for service worker scope
- Prototype HTTP
Supports-Loading-Mode
response header (prerendering opt-in) - Prototype and ship CSS
:dir()
pseudo-class - Experiment Local Font Access
- Ship CSS
hyphens: auto
value on Windows - Ship CSS
:is()
and:where()
pseudo-classes - Prototype CSS
scrollbar-color
andscrollbar-width
properties - Prototype TLS Encrypted Client Hello (ECH)
- Ship CSS
clip-path: path()
values - Prototype CSS
prefers-contrast
media feature - Prototype CSS
::target-text
pseudo-element - Prototype
getCurrentBrowsingContextMedia
method - Prototype WebID
- Ship CSS
aspect-ratio
property - Prototype Storage Buckets API
- Experiment WebXR Depth API
- Experiment Declarative Shadow DOM (cont.)
- Ship “Partition the HTTP cache”
September 2020
- Ship HTTP
Permissions-Policy
header - Experiment
scheduler.postTask
method for main-thread scheduling (cont.) - Ship Cross-Origin Isolation
- Prototype platform-issued trust tokens
- Experiment QuicTransport (cont.)
- Ship CSS
text-decoration-thickness
andtext-underline-offset
properties, andtext-underline-position: from-font
value - Experiment Idle Detection API (cont.)
- Experiment Notification Triggers (cont.)
- Experiment Origin Isolation (cont.)
- Experiment
performance.measureMemory
method (cont.) - Ship
navigator.scheduling.isInputPending
method - Ship CSS
ascent-override
,descent-override
, andline-gap-override
font descriptors - Ship Cookie Store API
- Experiment Conversion Measurement API
- Ship Web Share API on Windows and Chrome OS
- Prototype HTTP
Critical-CH
response header - Prototype and ship Screen Wake Lock
released
property
August 2020
- Experiment Digital Goods API
- Experiment WebCodecs
- Prototype CSS
overflow: clip
value andoverflow-clip-margin
property - Ship CSS flow-relative box model properties
- Prototype customizable
<select>
element - Prototype Progressive Web Apps as URL Handlers
- Ship Native File System API
- Prototype Raw Sockets API
- Prototype HTTP
Permissions-Policy
header - Ship CSS
quotes: auto
value - Ship Transferable Streams
- Experiment Multi-Screen Window Placement
- Prototype WebXR Depth API
- Prototype First-Party Sets
- Experiment
beforematch
event and CSScontent-visibility: hidden-matchable
value - Experiment HTML
<meta name="battery-savings">
tag - Ship Imperative Shadow DOM Distribution API
- Experiment Serial API (cont.)
- Ship opt-out for Scroll To Text Fragment (
force-load-at-top
document policy) - Prototype SVG image support for the Async Clipboard API
- Prototype HTML
<meta name="battery-savings">
tag - Prototype re-enabled
SharedArrayBuffer
gated behind COOP/COEP (on Android)
July 2020
- Prototype HTTP
Content-Encoding: jxl
value (JPEG XL) - Ship
strict-origin-when-cross-origin
as default referrer policy - Implement Web Share API on Windows and Chrome OS
- Ship HTTP
Document-Policy
header - Ship altitude and azimuth angles for Pointer Events
- Prototype
@font-face
descriptors for overriding font metrics (e.g.,ascent-override
) - Experiment opt-out for Scroll To Text Fragment
- Implement and ship WebXR AR Module
- Ship Permission Policty
web-share
permission - Experiment Declarative Shadow DOM
- Implement and ship DOM
replaceChildren
method - Ship CSS
::marker
pseudo-element - Prototype
'visibility-state'
performance entries - Prototype and ship
FetchEvent
handled
property (promise) - Prototype WebAuthn Level 2 and CTAP2.1
- Prototype
quotachange
event (storage pressure) - Prototype Sanitizer API
June 2020
- Ship Web Bluetooth
getDevices
andwatchAdvertisements
methods - Ship AVIF (image format)
- Prototype and ship Feature Policy
clipboard-read
andclipboard-write
policies - Ship Media Feeds (
<link rel="media-feed">
) - Implement and ship
HTMLMediaElement
preservesPitch
property - Implement and ship
PictureInPictureEvent
pictureInPictureWindow
property - Prototype Cross-Origin Isolation
- Prototype CSS
scrollbar-gutter
property - Prototype CSS
color-mix()
function - Implement and ship CSS
counter-set
property - Experiment WebHID (Human Interface Device)
- Ship WebXR Anchors
- Prototype Web Manifest
"display-override"
field - Implement and ship Intensive JavaScript Timer Throttling
- Ship CSS
content-visibility
property - Prototype WebXR Raw Camera Access
May 2020
- Prototype CSS
attr()
function Level 4 extension - Implement and ship updated CSS
color-scheme
property - Prototype MediaBlob (improved client side video editing)
- Prototype subresource loading with Web Bundles
- Experiment
performance.measureMemory
method (cont.) - Prototype MulticastReceiver API
- Ship Event Timing
- Implement and ship CSS
attr()
function Level 4 extension - Experiment QuicTransport
- Ship App Icon Shortcuts Menu
- Experiment Cookie Store API
- Ship CSS
row-gap
andcolumn-gap
properties in Flexbox Layout - Experiment Origin Isolation
- Experiment Trust Token API
- Prototype
beforematch
event
April 2020
- Ship Forced Colors Mode (CSS
forced-color-adjust
property) - Experiment Idle Detection API
- Prototype Web Bluetooth
watchAdvertisements
method - Ship Web Animations API
- Ship CSS
@property
at-rule - Experiment HTML
rendersubtree
attribute (cont.) - Ship Content Index API
- Prototype Virtual Keyboard API
- Prototype Window Segments Enumeration API
- Experiment Portals (same-origin, Android only)
- Prototype altitude and azimuth angles for Pointer Events
- Prototype App Icon Shortcuts Menu
- Ship
navigator.getInstalledRelatedApps
API on Windows - Prototype Window Controls Overlay for Installed Desktop Web Apps
- Prototype CSS
text-decoration-thickness
andtext-underline-offset
properties, andtext-underline-position: from-font
value
March 2020
- Ship CSS
revert
keyword - Ship Web OTP API (requesting one-time-passwords)
- Prototype CSS
lch()
andlab()
functions (CIE LAB color functions) - Prototype CSS
page
property (named pages) andpage-orientation
descriptor - Prototype CSS
aspect-ratio
property - Experiment Native File System API (cont.)
- Prototype Font Access API (enumerate installed fonts and obtain table data)
- Ship Wake Lock API
- Implement and ship (unprefixed) CSS
appearance
property - Implement and ship CSS
-webkit-appearance: auto
value - Ship WebXR DOM Overlay
- Ship
off
andnoscroll
values for the<iframe scrolling>
attribute - Experiment
performance.measureMemory
method
February 2020
- Ship Cross-Origin Opener Policy (COOP)
- Prototype Imperative Shadow DOM Distribution API
- Ship Cross-Origin Embedder Policy (COEP)
- Prototype URL Protocol Handler Registration for PWAs
- Prototype Web Bluetooth
getDevices
method - Ship CSS
:state()
pseudo-class - Prototype Media Feeds API
- Ship
durability
property for IndexedDB transactions (durability hint) - Ship
<iframe disallowdocumentaccess>
attribute - Ship ARIA
suggestion
,mark
, andcomment
roles andaria-description
attribute (ARIA annotations) - Ship CSS
contain-intrinsic-size
property - Prototype CSS
prefers-reduced-data
media feature - Prototype Declarative Shadow DOM
- Prototype CSS
spanning
media feature andfold-top
/fold-left
/fold-width
/fold-height
environment variables - Implement and ship CSS
font-display: optional
without relayout - Prototype
rawValue
property for<input>
elements - Experiment
scheduler.postTask
method for main-thread scheduling
January 2020
- Implement and ship
<input type="time">
with a reversed range (min
>max
) - Ship
requestAnimationFrame
method for<video>
elements - Prototype CSS
row-gap
andcolumn-gap
properties in Flexbox Layout - Ship WebXR Hit Testing
- Prototype mechanism for running PWAs on startup
- Implement and ship WebXR Augmented Reality (AR) Module
- Prototype Origin Isolation
- Prototype Origin Policy
- Ship CSS
color-scheme
property and"color-scheme"
<meta>
value - Ship HTTP
Sec-CH-UA-*
headers (Client Hints) - Deprecate and freeze HTTP
User-Agent
header value - Experiment Web NFC
- Ship Badging API
- Prototype
timezonechange
event - Experiment Native File System API (cont.)
December 2019
- Prototype Service Worker Scope Pattern Matching
- Ship Periodic Background Sync
- Implement and ship
buffered
option for Performance Observer - Implement and ship
submitter
property forsubmit
events - Ship Compression Streams
November 2019
- Prototype and ship Resize Observer
contentBoxSize
,borderBoxSize
, anddevicePixelContentBoxSize
properties - Ship HTML
<a hreftranslate>
attribute - Ship HTTP
Sec-Fetch-Dest
request header - Ship Media Playback Quality (
getVideoPlaybackQuality
method) - Ship CSS
ActiveText
,Field
, andFieldText
values (system color keywords) - Implement and ship CSS
image-orientation
property - Experiment Content Index API
- Implement
spatialNavigationSearch
method (part of CSS Spatial Navigation) - Experiment Contact Picker API (cont.)
- Ship
navigator.getInstalledRelatedApps
API - Ship CSS
:focus-visible
pseudo-class - Implement Window Placement
- Ship CSS
intrinsic-size
property
October 2019
- Ship default semantics for custom elements via the
ElementInternals
object - Ship ARIA attribute reflection
- Implement
latencyHint
attribute for HTML media elements - Experiment ARIA
annotation-attribution
,annotation-commentary
,annotation-presence
,annotation-revision
,annotation-suggestion
roles - Implement WebCodecs (access to built-in media encoders/decoders)
- Ship CSS
Canvas
andText
system color keywords - Implement
strict-origin-when-cross-origin
as new default for Referrer Policy - Implement Conversion Measurement API
- Implement MathML Core
- Experiment Serial API
- Implement Trust Token API
- Implement CSS
:state()
pseudo-class - Ship Scroll To Text Fragment
- Implement Raw Clipboard Access
- Experiment HTML
rendersubtree
attribute and CSScontent-size
property - Ship Trusted Types
- Implement
requestAnimationFrame
method for<video>
elements - Implement and ship CSS
@supports selector()
function - Ship image/video aspect ratios from HTML
width
andheight
attributes - Implement QuicTransport API (part of the WebTransport framework)
- Ship WebXR Device API
- Ship WebXR Gamepads Module
- Implement and ship string values for the CSS
list-style-type
property - Ship CSS
line-break: anywhere
value - Implement and ship CSS
overflow-wrap: anywhere
value
September 2019
- Implement percent-based scrolling
- Implement “heavy ad” intervention
- Implement ARIA roles for annotation purposes
- Implement and ship CSS
font-optical-sizing
property - Implement HTML
rendersubtree
attribute - Implement Screen Enumeration (
navigator.screen.requestDisplays
method) - Ship auto-upgrade mixed audio and video content (
http:
tohttps:
) - Implement navigation to Bundled HTTP Exchanges (Web Packaging)
- Implement CSS
navigation-controls
media feature - Experiment Wake Lock API
- Experiment SMS Receiver API
- Implement
EditContext
API - Implement image/video aspect ratios from HTML
width
andheight
attributes - Experiment Notification Triggers (show notifications when certain conditions are met)
- Implement and ship
autofocus
attribute on any focusable HTML/SVG element - Experiment Native File System API
- Implement
relaxedDurability
option for the IndexedDBtransaction
method (controls flushing to disk)
August 2019
- Implement
navigator.scheduling.isFramePending
method - Implement
CompressStream
andDecompressStream
APIs - Experiment WebXR Device API (cont.)
- Implement CSS
content-size
property - Implement and ship inline styles in WebVTT files
- Implement Font Enumeration API
- Experiment Badging API V2 (different badges depending on URL scope)
- Experiment JS Self-Profiling API
- Implement Element Reflection (“allow specifying semantic relationships between elements without the need to assign globally unique ID attributes”)
- Implement API for accessing TrueType/OpenType font tables
- Implement Document Policy
- Deprecate and remove non-
Secure
cookies in third-party contexts - Implement and ship WebAuthn in cross-origin iframes
- Implement CSS Modules V1
- Implement WebXR Anchors
- Implement default accessibility semantics for custom elements
- Experiment Periodic Background Sync
- Deprecate and remove Shadow DOM v0, Custom Elements v0, and HTML Imports (cont.)s
July 2019
- Implement
scheduler.postTask
method for main-thread scheduling - Implement Feature Policy
document-access
policy - Experiment
navigator.scheduling.isInputPending
method (early detection of input events) - Implement Storage Access API
- Ship Barcode Detection API (part of Shape Detection API)
- Ship Layout Instability API
- Implement JSON Modules
- Implement and ship
buffered
option forPerformanceObserver
observe
method - Experiment Trusted Types (cont.)
- Experiment
navigator.getInstalledRelatedApps
API (cont.) - Ship Element Timing
- Ship Largest Contentful Paint (LCP) page-load metric
June 2019
- Implement and ship CSS
overscroll-behavior-inline
andoverscroll-behavior-block
properties - Experiment Scroll To Text Fragment
- Ship alternative text for the CSS
content
property - Implement and ship CSS
min()
,max()
andclamp()
functions - Ship Animation Worklet
- Experiment Feature Policy Reporting (cont.)
- Implement and ship
integrity
attribute on<link rel="preload">
elements - Implement and ship CSS
font-size: xxx-large
value - Implement
<std-toast>
element (toast notification) - Implement Content Indexing
- Implement CSS
@property
at-rule - Implement JavaScript Memory API (
performance.measureMemory
method) - Implement
<std-switch>
element (toggle switch control) - Implement and ship Web Bluetooth
getAvailability
method
May 2019
- Implement
jump-start
,jump-end
,jump-none
, andjump-both
keywords for the CSSsteps()
easing function - Implement HTTP
Cross-Origin-Opener-Policy
response header - Implement Largest Contentful Paint (LCP) metric
- Implement and ship changes to cookies (add
SameSite=Lax
by default) - Ship Feature Policy
focus-without-user-activation
policy - Experiment
lowLatency
option for'2d'
and'webgl'
canvas contexts (cont.) - Implement CSS
color-scheme
property - Implement and ship
enterkeyhint
attribute - Ship
ImageBitmap
rendering context forOffscreenCanvas
- Ship form-associated custom elements
- Ship
'formdata'
event type - Implement and ship
HTMLFormElement
requestSubmit
method - Experiment WebXR Device API (cont.)
- Implement and ship CSS
scroll-snap-stop
property - Implement Bundled HTTP Exchanges
- Ship
pointerrawmove
event type - Experiment Badging API (cont.)
- Implement and ship
Animation
pending
property - Ship CSS
prefers-color-scheme
media feature
April 2019
- Ship
IDBTransaction
commit
method - Implement Feature Policy
execution-while-out-of-viewport
andexecution-while-not-rendered
features (enables freezing hidden iframes) - Implement Periodic Background Sync
- Implement JS Self-Profiling API
- Implement Picture-in-Picture for arbitrary content
- Experiment
<a hrefTranslate>
attribute (cont.) - Experiment Event Timing API (cont.)
- Ship CSS
white-space: break-spaces
value - Experiment HTML
importance
attribute (Priority Hints) (cont.) - Ship Storage Quota Usage Details
- Implement SMS OTP Retriever API
- Ship image support for the Async Clipboard API
- Implement and ship
Blob
text
,arrayBuffer
, andstream
methods - Implement Gamepad light indicator extension
- Ship HTTP
Sec-Fetch-Mode
,Sec-Fetch-Site
, andSec-Fetch-User
request headers - Ship arbitrary timestamps and metadata in User Timing
- Ship
Animation
constructor (Web Animations)
March 2019
- Ship Web Share Target Level 2 (adds support for files)
- Implement Native Caret Browsing
- Implement and ship CSS
:picture-in-picture
pseudo-class - Implement and ship SVG favicons (
<link rel="icon">
) - Ship
desynchronized
option for 2D canvas context (waslowLatency
) - Implement Element Timing for text
- Ship Feature Policy
document-domain
feature - Implement and ship HTML
<video playsinline>
attribute - Implement CSS
outline-color: invert
value - Implement and ship CSS
backdrop-filter
property - Implement alternative text for the CSS
content
property - Experiment KV Storage + import maps
- Ship Background Fetch
- Implement CSS
line-break: anywhere
value
February 2019
- Implement image support for the Async Clipboard API
- Implement and experiment Feature Policy
unoptimized-images
andoversized-images
features - Ship Signed Exchange Reporting for distributors
- Ship
PointerEvent
getPredictedEvents
method - Implement Notification Triggers (show notifications when certain conditions are met)
- Implement import maps (
<script type="importmap">
) - Implement Signed Exchange Reporting for distributors
- Experiment Event Timing API (cont.)
January 2019
- Implement and ship CSS transition events (
transitionrun
,transitionstart
, andtransitioncancel
) - Experiment HTML
<video autoPictureInPicture>
attribute - Implement HTML
<meta name="supported-color-schemes">
element - Ship Intersection Observer V2
- Implement and ship HTTP
Cross-Origin-Resource-Policy
header - Implement HTTP
Sec-CH-UA-*
headers (Client Hints) - Experiment HTML
importance
attribute (Priority Hints) - Experiment Web Contact API
- Implement HTTP
Sec-CH-Lang
header (Client Hints) - Experiment
navigator.getInstalledRelatedApps
API - Implement and ship CSS
font-optical-sizing
property - Ship Signed HTTP Exchanges (SXG)
- Implement file sharing in Web Share API
- Implement HTML Modules
- Experiment
<img elementtiming>
attribute - Experiment Feature Policy Reporting
- Experiment
'layoutjank'
performance entries - Experiment Event Timing API (cont.)
- Experiment Trusted Types for DOM Manipulation
- Ship
imagesrcset
andimagesizes
attributes for the<link>
element (selectively preloading images) - Implement and ship CSS
prefers-reduced-motion
media feature - Implement CSS
prefers-color-scheme
media feature
December 2018
- Implement and ship
document.featurePolicy
API (for policy introspection) - Implement Web Bluetooth Scanning
- Implement scroll-linked animations (only JavaScript part)
- Ship
stale-while-revalidate
Cache-control
extension - Ship CSS
::part
pseudo-element (CSS Shadow Parts) - Ship Constructable Stylesheet Objects
- Experiment Signed HTTP Exchanges (cont.)
- Experiment
lowLatency
option for'2d'
and'webgl'
canvas contexts (cont.) - Ship
GamepadButton
touched
property - Experiment Badging API
- Implement and ship
PerformanceObserver.supportedEntryTypes
property
November 2018
- Experiment Web XR Device API (cont.)
- Ship First Input Timing
- Implement Storage Quota Usage Details
- Experiment
<a hrefTranslate>
attribute - Implement User Idle Detection
- Implement form-associated custom elements
- Implement Contacts API
- Implement Feature Policy
document-domain
feature - Ship
Intl.ListFormat
API - Ship crash reports (Reporting API)
- Ship keyboard-focusable scroll containers
- Ship an API for enumerating IndexedDB databases
- Ship CSS Properties and Values API Level 1 (subset)
October 2018
- Implement
FetchEvent
Worker Timing (measuring the performance of service workers) - Implement an explicit API for commiting IndexedDB transactions
- Ship
colorSpace
andpixelFormat
options for canvas contexts (canvas color management) - Implement CSS
font-display
descriptor for@font-feature-values
(setting the defaultfont-display
value for a font family) - Experiment
lowLatency
option for'2d'
and'webgl'
canvas contexts - Experiment Event Timing API (cont.)
- Implement
'layoutjank'
performance entry (Performance API) - Ship
navigator.getDisplayMedia
method (Screen Capture) - Ship spec-compliant specificity for CSS Scoping selectors (
:host()
, etc.) - Experiment Background Fetch
September 2018
- Implement WebHID
- Experiment Signed HTTP Exchanges
- Implement Gamepad API touchpad extension
- Implement crash reports (Reporting API)
- Implement
PointerEvent
getPredictedEvents
method - Implement IndexedDB database enumeration API
- Implement Serial API
- Implement
navigator.isProtocolHandlerRegistered
method - Ship CSP
report-to
directive - Implement Display Locking
- Implement Element Timing for images (incl.
<img elementtiming>
attribute) - Ship User Activation API
- Ship
TextEncoderStream
andTextDecoderStream
APIs - Implement and ship CSP
script-src-attr
,script-src-elem
,style-src-attr
, andstyle-src-elem
directives - Implement and ship
queueMicrotask
function - Experiment WebXR Device API (cont.)
August 2018
- Ship
prefersNavigationBar
option for Fullscreen API - Ship Permission Delegation
- Implement
pointerrawmove
event type - Implement an API to measure the memory footprint of the website
- Implement HTML
intrinsicsize
attribute (for images and videos) - Remove Budget API
- Implement Feature Policy
animations
feature - Implement Feature Policy violation reports (
'feature-policy-violation'
report type) - Implement searchable invisible DOM
- Implement and ship TLS 1.3
- Implement HTML
<a hreftranslate>
attribute - Implement Writable Files
- Implement Feature Policy
lazyload
feature - Implement Shadow DOM imperative distributed API
- Ship WebSockets over HTTP/2
- Deprecate and remove Shadow DOM v0, Custom Elements v0, and HTML Imports
July 2018
- Implement iframe sandboxing features as Feature Policy features
- Implement Badging API
- Implement HTML
<portal>
element for seamless navigations between sites or pages - Experiment Feature Policy API (
document.policy
) - Implement and ship
queueMicrotask
function - Implement options argument for the
postMessage
method - Experiment Web Locks API (cont.)
- Implement Feature Policy
sync-script
feature (for disabling parser-blocking script execution) - Ship intervention reports
- Experiment
stale-while-revalidate
directive for HTTPCache-Control
header - Implement and ship
left
andright
values for the CSStext-underline-position
property
June 2018
- Implement
gamepadbuttondown
,gamepadbuttonup
,gamepadbuttonchange
, andgamepadaxismove
events - Ship Web Locks API
- Implement and ship DOM
Element
toggleAttribute
method - Experiment Cookie Store API
- Ship Notification Inline Replies
- Implement
stale-while-revalidate
directive for HTTPCache-Control
header - Ship CSS environment variables and
viewport-fit
descriptor for<meta name="viewport">
- Implement CSP
'unsafe-hashes'
source expression - Ship Keyboard Map (
navigator.keyboard
andkeyboardchange
event) - Implement and ship module workers (
type: 'module'
option forWorker
constructor) - Implement
navigator.getDisplayMedia
method (Screen Capture) - Ship Picture-in-Picture (
requestPictureInPicture
method) - Experiment Event Timing API
- Ship
Request
isHistoryNavigation
property - Implement an API for querying the user activation state
- Ship deprecation reports and the
ReportingObserver
API - Implement and ship nested, dedicated workers
May 2018
- Implement WebGPU API
- Implement and ship CSS Logical Properties
- Implement HTTP
Sec-Metadata
request header - Ship Web Lifecycle
- Implement
TextEncoderStream
andTextDecoderStream
APIs - Implement scroll target based on CSS selector in URL fragment
- Ship Reporting API and Network Error Logging
- Implement Gamepad API touchpad extension
- Ship
<script referrerpolicy>
attribute - Ship CSS Scroll Snap
- Experiment Picture-in-Picture (
requestPictureInPicture
method) - Ship Keyboard Lock API (second intent)
- Implement element visibility reporting for Intersection Observer API (
trackVisibility
andisVisible
properties) - Implement Async Local Storage API (layered API)
- Implement HTML
<virtual-list>
element (layered API) - Implement and ship
AnimationEvent
pseudoElement
property (CSS Animations)
April 2018
- Implement infrastructure for Layered APIs
- Ship
'same-origin'
as the default credentials mode forfetch()
(the previous default was'omit'
) - Ship HTTP
Network-RTT
andNetwork-BW
request headers (network quality estimates) - Implement Priority Hints API (
importance
attribute) - Implement and ship CSS
overflow
shorthand (accepts two values) - Implement User Timing Level 3 extensions
- Implement Wake Lock API
- Implement
prefersNavigationBar
option for Fullscreen API - Implement and ship Cross-Origin Read Blocking (CORB)
- Implement Keyboard Map (
navigator.keyboard
andkeyboardchange
event) - Implement Event Timing API (
'event'
performance entries) - Implement
customElements.upgrade
method
March 2018
- Ship events for back/forward mouse buttons (
button
property values3
and4
) - Implement
style
option forcustomElements.define
method (for providing a custom element’s default styles) - Implement
formdata
event type (Form Participation API) - Ship unified touch adjustment
- Ship Motion Sensors (based on Generic Sensor API)
- Ship Web Authentication API (with FIDO U2F support)
- Ship
TransformStream
constructor - Ship CSS
conic-gradient()
function - Ship customized built-in elements
- Implement and ship CSP
navigate-to
directive - Ship HTTP
Accept-CH-Lifetime
response header - Implement CSS Shadow Parts (
::part()
and::theme()
pseudo-elements) - Experiment AudioWorklet
February 2018
- Implement CSS
:focus-visible
pseudo-class - Ship Media Capabilities API (getting information about decoding capabilities)
- Ship
<slot>
elements in the flat tree - Implement WebSockets over HTTP/2
- Implement
srcset
andimgsizes
attributes on<link rel="preload" as="image">
elements - Ship
modulepreload
link relation - Experiment CSS Animation Worklet API
- Ship AudioWorklet
- Ship HTML
inputmode
attribute - Experiment Web Locks API
- Implement and ship: Expand list of properties that can apply to CSS
::first-letter
pseudo-elements - Ship Payment Handler API
- Implement constructable style sheet objects (
CSSStyleSheet
constructor) - Implement CSS
:is()
pseudo-class
January 2018
- Implement and ship CSS
x
unit (synonym fordppx
) - Implement “Lazily load below-the-fold iframes and images”
- Ship CSS
justify-items: legacy
value - Implement CSS
justify-items: legacy
value - Experiment “Extend Subresource Integrity (
<script integrity>
) to support validating a resource’s signature” - Implement Picture-in-Picture (
video.requestPictureInPicture()
) - Deprecate and remove
#
in data URL body (the first#
will be treated as the start of the fragment) - Implement and ship CSS
row-gap
,column-gap
, andgap
properties (grid-row-gap
/etc. become aliases) - Implement and ship CSS
calc()
in media queries - Ship CSS Typed OM
- Implement and ship “Fire an
input
event when arange
orfile
<input>
element is activated” - Implement and ship Performance Observer
takeRecords
method - Implement Permission Delegation (through
<iframe allow>
attribute) - Implement and ship Feature Policy
sync-xhr
feature - Experiment Media Capabilities API (cont.)
- Implement and ship “Fire an
input
event when a (mutable) checkbox is clicked” - Implement (a subset of the) CSS Layout API
- Ship Async Clipboard API
- Implement and ship
HTMLAnchorElement
relList
property - Experiment WebVR 1.1
- Ship Fetch API
keepalive
option
December 2017
- Ship CSS
display: contents
value - Implement CSS
:matches()
pseudo-class - Implement and ship Feature Policy
accelerometer
,gyroscope
,magnetometer
features - Implement and ship Abortable fetch (
AbortController
andAbortSignal
) - Implement unified touch adjustment
- Ship Feature Policy
autoplay
feature - Ship CSS
:any-link
pseudo-class - Ship TLS 1.3 draft-22 in 1-RTT mode
- Ship
<img decoding>
attribute - Ship Network Information
saveData
property
November 2017
- Implement CSS
:any-link
pseudo-class - Implement and ship HTTP 425 (Too Early) status code
- Implement Feature Policy
autoplay
feature - Implement and ship delayed dispatch of performance entries
- Implement and ship WebVTT
positionAlign
andlineAlign
properties - Implement events for back/forward mouse buttons (
button
property values3
and4
) - Experiment Web Audio API
AudioWorklet
interface - Implement Web Locks API
- Implement and ship
autocapitalize
attribute on<form>
andcontenteditable
elements - Ship Fetch API
cache
option (also a property onRequest
objects) - Experiment CSS
line-height-step
property - Implement
modulepreload
link relation - Implement and ship (subclassable)
EventTarget
constructor - Implement transform streams
- Implement and ship
preventScroll
option for focus APIs
October 2017
- Ship HTML
<iframe delegatestickyuseractivation>
attibute - Ship CSS
transform-box
property - Ship CSS
text-decoration-skip-ink
property (and removetext-decoration-skip: ink
value) - Implement stylable
<slot>
elements (assigned nodes inherit style) - Implement Fetch API
keepalive
option - Implement Web Lifecycle
- Implement Network Information
saveData
property - Implement
<img async>
attribute - Implement and ship CSP
'unsafe-hashed-attributes'
source expression
September 2017
- Ship Resize Observer API
- Implement and ship
<textarea autocomplete>
and<select autocomplete>
attributes - Implement CSS
overflow-wrap: break-spaces
value - Ship JavaScript
import()
syntax for dynamic imports - Implement Gesture Delegation (HTMLIframeElement
allowedActivationDelegation
property) - Implement trusted types for DOM manipulation
- Implement PauseFrame API
- Ship “Send mouse events (excluding
click
) to disabled form controls” - Implement and ship MediaStreamTrack
applyConstraints
method - Experiment Media Capabilities API
- Ship CSS Paint API
- Implement CSS Animation Worklet API
- Ship Intl NumberFormat
formatToParts
method - Implement revised WebVR API
- Ship Promise
finally
method - Ship CSS
scroll-boundary-behavior
property - Ship Keyboard Lock API (
navigator.requestKeyboardLock
method) - Implement options argument for Element
focus
method
August 2017
- Ship
navigator.deviceMemory
property - Implement and ship
history.index
property - Implement and ship “Treat
http://localhost
as a secure context” - Implement and ship CSS
q
unit - Implement Gamepad API haptics extension
- Ship Server Timing
- Ship Performance
timeOrigin
property - Experiment Generic Sensor API
- Experiment WebVR (cont.)
- Ship “Dispatch mouse transition events after layout”
- Ship collapsable table rows (via CSS
visibility: collapse
) - Implement Origin Policy
July 2017
- Ship
s
flag for JavaScript regular expressions - Implement
performance.timeOrigin
property - Ship HTMLImageElement
decode
method - Ship HTTP
Device-Memory
header - Ship HTTP
Expect-CT
header - Implement JavaScript
import()
syntax for dynamic imports
June 2017
- Experiment Shape Detection API
- Ship OpenType variable fonts
- Implement and ship
beforeprint
andafterprint
events - Implement and ship HTML
<time>
element - Implement and ship HTML
<data>
element - Implement and ship URLSearchParams
sort
method - Implement collapsable table rows (via CSS
visibility: collapse
) - Ship
<script type="module">
- Ship inert visual viewport and Visual Viewport API
- Ship HTTP
Clear-Site-Data
header - Ship ImageCapture
getPhotoSettings
method - Ship Web Share API
- Implement deprecation reports and the
ReportingObserver
API - Implement and ship “Move the role of the scrolling element from
<body>
to<html>
” - Implement and ship Referrer Policy
'same-origin'
,'strict-origin'
, and'strict-origin-when-cross-origin'
values
May 2017
- Implement and ship “Exit fullscreen mode if a JavaScript dialog is shown”
- Implement and ship Element
getAttributeNames
method - Ship WebUSB
- Ship CSP Embedded Enforcement (
<iframe csp>
attribute) - Implement and ship DOMTokenList
replace
method - Implement and ship mandatory
as
value forpreload
links - Implement and ship
navigator.webdriver
property - Implement CSP
report-to
directive - Ship Network Information API
downlink
,rtt
, andeffectiveType
properties - Ship Storage API
navigator.storage.estimate
method - Implement and ship CSS Box Alignment for Flexbox Layout
- Ship stricter
X-Frame-Options: SAMEORIGIN
(check all ancestor frames) - Ship First Paint Timing API (
PerformancePaintTiming
interface) - Implement and ship Credential Management API
password
property - Implement and ship
messageerror
event - Ship Fetch API
formData
method
April 2017
- Implement HTTP
Device-Ram
header andnavigator.deviceRam
API - Ship Web Payment Manifest
- Ship Navigation Preload for Service Worker
- Implement Memory Pressure API
- Implement and ship CSS
scroll-behavior
property andbehavior
option for scroll APIs (enables smooth scrolling) - Ship Budget API
reserve
method - Experiment Budget API
getCost
andgetBudget
methods
March 2017
- Implement HTMLImageElement
decode
method - Ship ReadableStream
pipeTo
andpipeThrough
methods - Ship writable streams
- Ship APNG
- Implement CSS
transform-box
property - Implement and ship “CSP hash expressions matching external scripts” (
<script integrity>
) - Implement and ship
DataTransfer
constructor - Experiment
navigator.getInstalledRelatedApps
API - Ship InputEvent
- Ship Image Capture
- Implement Web Payment Manifest
- Implement and ship CSS
frames()
timing function - Implement and ship CSS
:focus-within
pseudo-class - Ship Feature Policy v1
- Ship
script-sample
property in CSP violation reports - Implement CSS
conic-gradient()
notation - Implement Accessibility Object Model
- Implement Server Timing
- Implement and ship HDR display detection via
screen.colorDepth
,screen.pixelDepth
, and the CSScolor
media feature - Ship Geometry Interfaces
- Ship “Android on-screen keyboard doesn’t resize layout”
- Implement
sample
property for CSP reports
February 2017
- Ship animations/transitions on the CSS
offset-path
property - Implement and ship “Temporarily stop permission requests after 3 dismissals”
- Implement and ship HTMLMediaElement
controlsList
property (for customizing native media controls) - Implement and ship CSS Box Alignment
place-*
(shorthand) properties - Ship
allow-top-navigation-by-user-activation
keyword for<iframe sandbox>
- Ship IndexedDB 2.0 APIs
- Implement HTML
inert
attribute - Implement Media Capabilities API (getting information about decoding capabilities)
- Implement and ship “Pause
<video muted autoplay>
when invisible (on Android) - Implement and ship global
origin
property (self.origin
) - Implement and ship construcing workers with
data:
URLs - Implement HTTP
Network-RTT
andNetwork-BW
headers (Network Information API extension) - Ship Long Task API
January 2017
- Implement and ship CSS
color-gamut
media feature - Implement Background Fetch API
- Implement uncancellable touch events when the main thread is busy (intervention)
- Remove prerendering in Chrome
- Ship CSS
font-display
property - Implement and ship “Send all keys (except ESC/F11) to the web app when the browser is in fullscreen mode”
- Ship PointerEvent
getCoalescedEvents
method - Ship CSS
line-height-step
property - Ship Token Binding
- Experiment “navigation preload for service workers”
- Implement CSS Logical Properties (
margin-*
properties) - Experiment WebUSB (another Origin Trial)
- Implement and ship PointerEvent
tangentialPressure
andtwist
properties - Ship WebAssembly
- Implement and ship CSS
display: flow-root
value - Ship Media Session API
- Implement
Expect-CT
header - Experiment
document.rootScroller
property - Implement Canvas color management (
colorSpace
property)
December 2016
- Implement and ship
rel="prefetch"
inLink
header - Implement asynchronous Clipboard API
- Implement and ship ARIA 1.1
- Implement Reporting API
- Ship
ClipboardEvent
constructor - Implement and ship CSS Logical Properties (
*-size
properties) - Implement System Keyboard Lock
- Implement CSS
scroll-boundary-behavior
property - Implement and ship Web App Manifest
purpose
field (for icons) - Implement Web Share Target API
- Implement and ship SVG transform presentation attributes
- Implement MediaStreamTrack Content Hints
- Implement and ship Presentation API 1-UA mode
- Implement Phone number API (a.k.a. Sign up API)
November 2016
- Implement ReadableStream
pipeTo
andpipeThrough
methods - Implement PerformancePaintTiming interface (incl. time to first paint)
- Implement and ship changes to CSP’s model for workers
- Implement OpenType variable fonts
- Implement and ship
<iframe allowpaymentrequest>
attribute - Implement PointerEvent
getCoalescedEvents
method - Ship CSS
text-decoration-*
properties - Implement and ship CSS
::placeholder
pseudo-element - Ship Remote Playback API
- Implement and ship CSS
caret-color
property - Ship CSS Grid Layout
- Implement Web Authentication API
- Implement and ship Payment Request API
canMakeActivePayment
method - Ship “Fire
visibilitychange
event on document unloading” - Implement and ship Navigation Timing Level 2
- Implement and ship Resource Timing
nextHopProtocol
property - Implement and ship CSP's
worker-src
directive - Implement Payment App API
- Implement navigation preload for service workers
- Ship scroll anchoring
October 2016
- Implement and ship
<link referrerpolicy>
attribute - Ship CSS
position: sticky
value - Implement FIDO U2F API
- Implement and ship Fractional MouseEvent coordinates
- Implement and ship KeyboardEvent
isComposing
property - Implement WritableStream (part of Streams API)
- Implement CSS
shape
media feature - Ship WebGL 2.0
- Ship TLS 1.3 1-RTT (field trial)
- Implement and ship ImageBitmap rendering context for
<canvas>
- Remove CSP
'referrer'
directive - Implement and ship CSS
display: contents
value - Intervene “Treat touch Scroll-blocking event listeners as passive”
- Implement and ship
PresentationConnection.url
property - Ship Web Bluetooth
- Ship “Render Unicode control characters”
- Implement and ship CSS
system-ui
generic font family - Ship Notification API
image
property (“a large image as part of the content of a notification”) - Ship durable (persistent) storage
- Implement customized built-in elements
- Ship HTTP
Referrer-Policy
header
September 2016
- Ship CSP violation event
disposition
property - Experiment Long Task API
- Implement CSS
overscroll-action
property - Ship
pinch-zoom
value for CSStouch-action
property - Implement Content Security Policy: Embedded Enforcement
- Experiment MediaStream Image Capture
- Ship
MediaStream
constructor - Implement and ship CSS
text-decoration-skip
property (and default toink
value) - Ship Pointer Events
- Ship ECMAScript async functions
- Implement and ship constructible document with
new Document()
- Experiment WebVR
- Ship MediaDevices
devicechange
event - Ship CSS
hyphens
property - Implement “Process continuous events just before
requestAnimationFrame
occurs” - Implement Shape Detection API
- Implement AudioWorklets for Web Audio API
August 2016
- Implement Accelerometer, Gyroscope and Magnetometer Sensor APIs
- Implement CSS Properties and Values API
- Experiment Web Share API on Android
- Ship
auxclick
event type - Implement IndexedDB object store and index renaming (during version change transactions)
- Implement Notifications API
image
property - Experiment WebUSB (updated)
- Ship custom elements v1
- Implement
once
option foraddEventListener
method - Ship media tracks (limited to 1 audio/video track)
- Implement and ship
dataset
API on SVG elements - Experiment foreign fetch and
serviceworker
link relation - Implement and ship unprefixed CSS
-webkit-image-set
function - Implement “long task” notifications in Performance Observer
- Ship visual viewport
- Implement Budget API
July 2016
- Ship ParentNode/ChildNode
prepend
/append
/before
/after
/replaceWith
methods - Ship
pan-up
/pan-down
/pan-left
/pan-right
values for CSStouch-action
property (follow up) - Implement and ship “Allow web pages to request fullscreen while an orientation change event handler is running”
- Implement and ship
Node.getRootNode
method (wasNode.rootNode
) - Implement Content Size Policy
- Implement and ship Gamepad API extensions (
touched
andpose
properties) - Ship
BroadcastChannel
API - Implement CSP
require-sri-for
directive - Implement and ship Push API
PushSubscription.options
property - Implement
"auxclick"
event type (non-primary button click) - Implement and ship “Block
navigator.vibrate
in cross-origin iframes” - Ship
pan-up
/pan-down
/pan-left
/pan-right
values for CSStouch-action
property
June 2016
- Ship PaymentRequest API
- Implement and ship
"install"
event for Web App Manifest - Implement and ship timer throttling for hidden, cross-origin frames
- Implement Feature Policy
- Implement and ship CSS
the text-size-adjust
property - Ship Shadow DOM v1
- Ship Media Capture from
<audio>
/<video>
(“WebRTC streaming of prerecorded content”) - Implement Web Share API
- Implement
Referrer-Policy
HTTP header - Ship “Do not perform default action on un-trusted events”
- Implement “Web Audio requires user gesture on Android”
- Implement and ship “Autoplay muted videos on Android” (
<video autoplay muted>
) - Implement and ship Resource Timing
transferSize
/encodedBodySize
/decodedBodySize
properties - Implement “Block cross-origin scripts inserted via document.write” (for users on slow connections)
- Implement Media Capture Depth Stream Extensions (media stream from depth camera)
May 2016
- Ship HTTP Alternative Services
- Implement and ship “External stylesheets in
<body>
do not block paint” - Implement and ship CSS
nav-up
,nav-down
,nav-left
,nav-right
properties - Implement and ship “Apply
u
flag to<input pattern>
attribute” - Implement and ship
allow-presentation
token for<iframe sandbox>
attribute - Implement Resize Observer API
- Ship “Specifying a
ReadableStream
response body in theResponse
constructor” - Implement permission delegation for
<iframe>
s - Ship (read-only)
action
/vibrate
attributes onNotification
instances - Ship “Do not perform default action on untrusted events”
- Implement ECMAScript async functions (
async
andawait
) - Implement IndexedDB Observers
- Ship 8 and 4-digit hex color notation (
#RRGGBBAA
and#RGBA
) - Deprecate and remove
requestAutocomplete
method - Implement and ship CSS
font-variant-numeric
property - Experiment durable storage (
navigator.storage.persist
and.persisted
methods) - Ship Performance Observer API
April 2016
- Ship Web Push protocol and subscription restrictions
- Implement
Clear-Site-Data
HTTP header - Implement Generic Sensor and Ambient Light Sensor APIs
- Ship Token Binding
- Ship CSS Containment (
contain
property) - Implement CSS
hyphens
property - Implement and ship
ImageBitmap.close
method - Implement and ship
unsafe-dynamic
CSP source expression - Implement and ship
IDBKeyRange.includes
method - Implement Storage Quota Estimation API (
navigator.storage.estimate()
) - Ship ECMAScript 2016 exponentiation operator
- Ship
ImageBitmapOptions
- Implement Mediastream Image Capture (e.g. taking pictures from a webcam)
- Implement and ship
-webkit-appearance: none
for<meter>
and<progress>
elements - Ship
HTMLMediaElement.srcObject
for MediaStreams - Implement and ship CSS
user-select: none
(unprefixed) - Experiment WebUSB
- Ship filters in 2D canvas (
CanvasRenderingContext2D.filter
property) - Implement and ship
Node.isConnected
property
March 2016
- Implement and ship Fetch API
Request.referrerPolicy
property - Ship DOM
KeyboardEvent.key
property - Implement multiple audio and video tracks
- Ship
SameSite
attribute for cookies - Implement inline replies in web notifications
- Implement Visual Viewport API
- Implement and ship notification badges
- Implement multiple image definitions for notifications
- Implement
HTMLMediaElement.srcObject
for MediaStreams - Ship iterable array-like interfaces
- Ship Intersection Observer
- Implement and ship “Disallow
document.open
anddocument.write
during unload” - Implement “Fire
"visibilitychange"
event on document unloading” - Implement
<script type="module">
- Ship DOM
.rootNode
property - Implement and ship “Correct handling of percentages in children of flex items”
- Implement CORS restrictions on internet-to-intranet connections
February 2016
- Implement Remote Playback API
- Implement and experiment AppInstalled API
- Ship
referrerpolicy
attribute - Ship Experimental Framework
- Implement
MediaDevices
'devicechange'
event - Implement and ship “Do not use web page-provided strings for
'beforeunload'
dialogs” - Implement CSS
@apply
rule - Ship
EventListenerOptions.passive
- Implement Payment Request API
- Ship Credential Management API
- Ship Media capture from
<canvas>
(captureStream
method ) - Implement and ship CSS
font-variant-caps
property - Implement CSS Snap Size
- Implement and ship Basic
InputEvent
interface - Implement and ship CSS
:dir()
pseudo-class - Ship Web Animations Level 1, interop with Firefox
- Implement
ImageBitmap
options - Implement Non-document root scrollers
- Implement
"serviceworker"
link relationship - Implement and ship Optional icon URL for notification actions
- Implement and ship “Merge
DOMSettableTokenList
intoDOMTokenList
” - Experiment Web Bluetooth API
- Implement and ship Notification renotify flag
- Implement Push subscription restrictions and the Web Push protocol
- Implement CSS
break-after
,break-before
,break-inside
(generic breaking control) - Implement and ship “
HTMLMediaElement.play()
retuns a promise”
January 2016
- Implement and ship
"notificationclose"
event - Ship
"preload"
link relationship - Implement CSS Paint API
- Ship Brotli (
Accept-encoding: br
on HTTPS connection) - Ship Unprefixed CSS Multi-column Layout
- Ship
ImageBitmap
andcreateImageBitmap
method - Implement Media Capture from
HTMLMediaElement
- Implement and ship CSS
column-fill
property - Implement and ship
FetchEvent.clientId
andClients.get(id)
for Service Worker - Implement
EventListenerOptions.passive
- Ship “Modify
{add,remove}EventListener
to acceptEventListenerOptions
” - Ship Canvas Hit Regions
December 2015
- Implement and ship CSS
inverted-colors
media feature - Ship Push messaging payloads (
PushEvent.data
property) - Ship CSS Custom Properties Level 1
- Ship
i
modifier for attribute selectors - Implement OffscreenCanvas
- Implement and ship Cookie prefixes and Strict Secure Cookies
- Implement Worklets
- Ship Canvas
toBlob
method - Ship Promise rejection tracking events
November 2015
- Implement and ship
HTMLMediaElement.disableRemotePlayback
- Ship Media Stream Recording API
- Ship Background Sync (one-shot)
- Implement CSS Containment
- Implement and ship
addEventListener
/removeEventListener
non-optional arguments - Implement and ship DOMTokenList-based feature detection for
<link>
and<iframe>
- Implement and ship
URLSearchParams
- Implement suborigins
- Implement and ship
"noopener"
link relation
October 2015
- Ship notification action buttons
- Implement and ship
"navigate"
mode infetch
requests - Ship Audio Output Devices API
- Implement CSS Typed OM
- Implement “modify
addEventListener
to acceptEventListenerOptions
” - Ship
WindowClient.navigate
method for service workers
September 2015
- Ship Local Font Access API
- Ship durable storage
- Implement iterable
NodeList
- Implement CSS
position: sticky
- Implement and ship “Allow
data:
andblob:
schemes in Fetch API” - Implement CSS
font-display
- Ship
stale-while-revalidate
Cache-control extension
August 2024
- Prototype Network Error Logging
July 2024
- Prototype CSS
stretch
keyword (and-webkit-fill-available
alias) - Implement
HTMLVideoElement
requestVideoFrameCallback
method
June 2024
- Ship CSS
transition-behavior
property - Ship CSS
@starting-style
rule - Experiment Privacy-Preserving Attribution
- Prototype CSS
field-sizing
property - Prototype HTML
popover=hint
attribute - Prototype and ship alt text for the CSS
content
property - Ship CSS Relative Color Syntax
May 2024
- Prototype and ship (non-standard) CSS
-webkit-font-smoothing
property - Ship CSS Properties and Values API (incl.
@property
) - Prototype
Partitioned
attribute for cookies (CHIPS) - Prototype bounce tracking nitigations
- Prototype CSS Anchor Positioning
April 2024
- Ship Async Clipboard API
read
andwrite
methods - Prototype CSS
@starting-style
rule - Prototype CSS
@scope
rule - Prototype CSS margin at-rules (such as
@top-left
) - Prototype CSS Relative Color Syntax (
from
keyword) - Ship CSS
zoom
property andElement
currentCSSZoom
property - Prototype legacy
textInput
event
March 2024
- Prototype Close Watchers
- Prototype and ship
URL.parse
static method - Ship custom state pseudo-class (
CustomStateSet
interface) - Prototype
Selection
direction
property andgetComposedRanges
method, and selections across shadow boundaries - Prototype element reflection for ARIA relationship attributes (
ARIAMixin
interface) - Ship Clipboard
readText
method - Ship color interpretation mode in CSS gradients
February 2024
- Prototype and ship CSS
align-content
property on block containers - Prototype CSS
user-find
property
January 2024
- Ship
Link
headers withrel=preload
orrel=modulepreload
in HTTP Early Hints responses - Ship: Fire pointer events on disabled form elements
- Prototype Observable
- Ship Screen Wake Lock API
- Ship Declarative Shadow DOM
- Prototype and ship CSS
content-visibility
property
December 2023
- Prototype and ship CSS
xywh()
andrect()
basic shapes - Ship CSS
offset-position
andoffset-path
properties - Ship
content-box
andstroke-box
values for CSStransform-box
property
November 2023
- Ship HTML
popover
attribute - Preview Declarative ShadowDOM
- Ship Cache API in Private Browsing Mode
- Prototype and ship
<hr>
elements inside<select>
elements - Prototype Invokers
- Prototype
._internals.states
property for exposing custom element states (CustomStateSet
)
October 2023
- Prototype and ship
HTMLSelectElement
showPicker
method - Ship CSS
:has()
pseudo-class - Ship Global Privacy Control
- Ship CSS
text-wrap: balance
value - Prototype and ship
hanging
andeach-line
keywords for thetext-indent
CSS property - Prototype and ship HTML
loading=lazy
attribute on<iframe>
elements - Ship Early Hints
- Prototype and ship User Activation API
- Prototype and ship CSS
lh
andrlh
units - Prototype and ship CSS
light-dark()
color function
September 2023
- Prototype CSS
zoom
property - Prototype and ship CSS inheritance to
::backdrop
from its originating element (e.g.,<dialog>
) - Prototype Screen Wake Lock API
- Prototype Early Hints
- Prototype and ship CSS
attr()
fallback - Prototype HTTP
Origin-Agent-Cluster
header - Prototype Scroll To Text Fragment
- Prototype CSS
text-wrap: balance
keyword - Ship ARIA reflection (non-IDREF) and default accessibility semantics for Custom Elements
August 2023
- Experiment and ship TLS Encrypted Client Hello (ECH)
- Prototype and ship CSS
:first
pseudo-class - Implement and ship CSS
font-synthesis-position
property - Prototype Global Privacy Control (HTTP
Sec-GPC
header) - Prototype CSS
:has
selector - Prototype and ship HTML
<search>
element - Ship CSS
round()
,mod()
,rem()
,pow()
,sqrt()
,hypot()
,log()
,exp()
,abs()
, andsign()
functions
July 2023
- Prototype CSS
text-transform: math-auto
keyword - Ship CSS
math-style
andmath-depth
properties, andfont-size: math
keyword - Prototype CSS Custom Highlight API
June 2023
- Prototype CSS Properties and Values API
- Ship Audio Output Devices API
- Prototype and ship CSS Nesting
- Prototype Federated Credential Management (FedCM)
- Implement WebCodecs
- Ship pasting files using ClipboardEvent
- Prototype and ship external hashes (SRI) in Content Security Policy
- Prototype and ship
URL.canParse
function
May 2023
- Ship CSS
animation-composition
property - Ship IndexedDB API in Private Browsing Mode
- Ship
modulepreload
link relation - Ship Module Workers
- Prototype and ship HTML
dirname
attribute (submitting element directionality) - Ship conditional
@import supports()
rules - Ship CSS
NaN
/infinity
incalc()
April 2023
- Prototype CSS transitions of discrete properties
- Prototype conditional
@import
rules in CSS - Prototype CSS
inverted-colors
media feature - Prototype and ship expanded CSS
:lang()
selector (incl. wildcard matching)
March 2023
- Ship CSS
color-mix()
function - Prototype SVG
<discard>
element - Prototype and ship CSS
scripting
media feature - Prototype and ship Compression Streams
- Prototype and ship selector argument in CSS
:nth-child()
and:nth-last-child()
pseudo-classes - Prototype CSS Custom Highlight API
- Prototype CSS
prefers-reduced-transparency
media feature - Prototype and ship CSS Color 4 functions (
lab()
,lch()
,oklab()
,oklch()
,color()
) - Prototype Async Clipboard API
read
andreadText
with user confirmation - Ship HTML
inert
attribute - Prototype and ship CSS
forced-color-adjust
property - Ship CSS
linear()
easing function
February 2023
- Prototype Screen Orientation
lock
method on Android and Windows tablet
January 2023
- Prototype and ship CSS size container queries
- Prototype and ship focus fixup rule
- Ship permanently partitioned third-party storage
- Ship HTML
autocapitalize
attribute - Ship CSS
page
property (named pages) - Prototype WebGPU
December 2022
- Prototype and ship CSP
'unsafe-hashes'
source expression - Prototype CSS
page
property (named pages) - Ship
scrollend
event
November 2022
- Ship WebMIDI (via site permission add-ons)
- Prototype and ship Origin Private File System API
October 2022
- Ship CSS trigonometric functions and constants
- Ship
width
andheight
attributes for HTML<source>
elements - Ship CSP
script-src-elem
,script-src-attr
,style-src-elem
,style-src-attr
directives - Prototype CSS
font-variant-emoji
property - Ship Import Maps
- Prototype Audio Output Devices API
- Prototype and ship CSS
font-palette
property and@font-palette-values
at-rule
September 2022
- Ship CSS
contain-intrinsic-size
property and its longhands - Prototype default accessibility semantics for custom elements via the
ElementInternals
object - Ship COLRv1 fonts
August 2022
July 2022
- Ship OffscreenCanvas
- Prototype HTML
width
andheight
attributes on<source>
elements - Prototype and ship CSP
script-src-elem
andscript-src-attr
directives - Prototype and ship Canvas 2D context
fontKerning
property - Prototype CSS
animation-composition
property
June 2022
May 2022
- Ship CSS constructable stylesheets
- Prototype Transferable Streams
- Ship
TransformStream
andReadableStream
pipeThrough
method
April 2022
- Ship CSS small (
sv*
), large (lv*
), dynamic (dv*)
, and logical (vi
,vb
) viewport units - Ship CSS
prefers-contrast
media feature - Prototype and ship
HTMLInputElement
showPicker
method - Prototype
TransformStream
andReadableStream
pipeThrough
method - Prototype Largest Contentful Paint
- Prototype Import Maps
March 2022
- Prototype CSS
content-visibility: hidden
value
January 2022
- Ship Readable Streams (new implementation)
- Ship relaxed cache re-validation on a soft reload (don’t re-validate subresources)
- Ship CSS
hyphenate-character
property - Ship form-associated custom elements
- Ship HTML
<dialog>
element
December 2021
- Ship CSS
scrollbar-gutter
property - Prototype CSS
hyphenate-character
property - Ship CSS
d
property - Prototype
OffscreenCanvas
interface - Ship
SameSite=Lax
cookie attribute by default
November 2021
- Prototype and ship CSS
hwb()
function (HWB Colors) - Ship Web Locks API
- Ship
reversed()
functional notation for the CSScounter-reset
property
October 2021
- Ship CSS
size
property in@page
rules - Ship partitioned third-party service workers
- Ship HTML
inputmode
attribute on desktop - Prototype Prioritized Task Scheduling
- Prototype URL Query String Stripping
- Prototype and ship CSS
input-security
property - Prototype and ship
structuredClone
function
September 2021
- Ship HTML
enterkeyhint
attribute - Prototype CSS
size
property for@page
- Prototype Scroll-linked Animations
- Prototype and ship
<input type=datetime-local>
on desktop - Prototype and ship CSS
SelectedItem
andSelectedItemText
system colors - Prototype and ship
smooth
andpixelated
values for the CSSimage-rendering
property - Ship
ShadowRoot
delegatesFocus
property - Prototype CSS
@layer
at-rule
August 2021
- Ship
"HTTPS"
DNS resource record (HTTPS RR) - Prototype Web Locks API
- Prototype and ship
reportError
function - Ship
avoid-page
andavoid-column
values for CSSbreak-inside
property - Prototype and ship CSS
system-ui
generic font family name - Ship
disabledFeatures
static method for custom element classes
July 2021
- Prototype and ship CSS
accent-color
property - Ship
assign
method for<slot>
element - Ship CSS
size-adjust
descriptor and extended syntax of thefont-size-adjust
property
June 2021
- Ship CSS
font-synthesis: small-caps
value - Ship CSS
content: none
on elements - Ship CSS
content: none
on::marker
pseudo-elements - Ship CSS
tab-size
property - Ship Implicit Pointer Capture
May 2021
- Ship Visual Viewport API on desktop platforms
- Ship HTTP
Ship Sec-Fetch-*
headers (Fetch Metadata Request Headers) - Prototype CSS
d
property on SVG<path>
elements - Prototype JPEG XL image format (limited support)
April 2021
- Prototype and ship relaxed cache re-validation on soft reload
- Prototype and ship EXIF image density correction
- Ship CSS
ascent-override
,descent-override
, andline-gap-override
font descriptors - Ship CSS
forced-colors
media feature (néeprefers-contrast
)
March 2021
- Prototype and ship inferred
aspect-ratio
fromwidth
/height
attributes for<video>
,<canvas>
and<input type=image>
- Prototype CSS
ascent-override
,descent-override
, andline-gap-override
font descriptors - Prototype CSS
glyph-scale-factor
/size-adjust
descriptor - Ship
AbortSignal.abort()
for creating an abortedAbortSignal
- Ship AV1 Image File Format (AVIF)
- Ship CSS
aspect-ratio
property - Prototype CSS
fit-content()
function
February 2021
- Ship outlines that follow
border-radius
- Prototype CSS
color-mix()
function - Prototype and ship CSS
:user-valid
and:user-invalid
pseudo-classes - Prototype outlines that follow
border-radius
January 2021
December 2020
- Ship Network Partitioning (incl. storage and HTTP cache partitioning)
- Ship
strict-origin-when-cross-origin
as default referrer policy - Prototype CSS
:autofill
pseudo-class - Unship
<menu type=context>
,<menuitem>
, andcontextMenu
property (HTML context menus) - Prototype and ship
signal
option foraddEventListener
method (AbortSignal)
November 2020
- Implement and ship CSS
touch-action: pinch-zoom
value - Ship CSS
:focus-visible
pseudo-class
October 2020
- Prototype and ship
localhost
addresses as secure contexts (“potentially trustworthy”) - Ship CSS
conic-gradient()
notation
September 2020
- Ship Media Session API
- Prototype CSS
math-style
property - Ship
beforeinput
event and itsgetTargetRanges
method - Prototype better error recovery for CSS
:is()
and:where()
pseudo-classes - Prototype TLS Encrypted Client Hello
- Prototype HTML
autocapitalize
attribute - Ship
allow-downloads
keyword for the<iframe sandbox>
attribute - Ship CSS
::file-selector-button
pseudo-element
August 2020
- Ship
selectionchange
event for<input>
and<textarea>
elements - Prototype WebXR Layers
- Ship Redirect Tracking Protection
July 2020
- Ship CSS
overflow: clip
value - Unship CSS
::-moz-focus-outer
pseudo-element - Ship composite modes for animations
- Prototype Payment Handler API
- Prototype Sanitizer API
- Ship CSS
appearance
property (unprefixed) - Prototype CSS
cross-fade()
function - Prototype CSS
prefers-contrast
media feature - Prototype unprefixed CSS
appearance
property
June 2020
- Ship in Nightly HTML
<dialog>
element - Prototype HTML
inert
attribute - Prototype
enterkeyhint
attribute
May 2020
- Ship DOM
replaceChildren
method - Ship
<link rel=preload>
- Prototype CSS
aspect-ratio
property - Prototype CSS
::file-chooser-button
pseudo-element - Prototype Schemeful Same-Site (http://example.com and https://example.com considered cross-site)
- Ship CSS
:read-only
and:read-write
pseudo-classes
April 2020
- Prototype Dynamic First-Party Isolation
- Prototype and ship CSS
:is()
and:where()
pseudo-classes - Ship AudioWorklet
- Prototype ARIA reflection
March 2020
- Prototype and ship “Defer
<script defer>
execution until all script-blocking stylesheets are loaded” - Unship FTP protocol
- Ship
getAnimations
method for the Element and Document interfaces
February 2020
- Prototype and ship ARIA
suggestion
,mark
, andcomment
roles andaria-description
attribute (ARIA annotations) - Prototype CSS
:focus-visible
pseudo-class - Prototype and ship CSS
min()
,max()
, andclamp()
functions - Implement CSS
conic-gradient()
notation - Prototype and ship
<img loading>
attribute (for lazy-loading images) - Ship
submit
event (containssubmitter
property) - Ship
<form>
requestSubmit
method
January 2020
- Prototype masonry layout in CSS Grid
- Ship CSS
outline-style: auto
value - Implement AVIF image format (based on the AV1 video codec)
- Ship HTTP
Cross-Origin-Resource-Policy
header - Prototype
beforeinput
event - Ship CSS
text-underline-position
property
December 2019
- Implement and ship CSS
overscroll-behavior-inline
andoverscroll-behavior-block
properties - Prototype and ship
IDBTransaction
commit
method - Prototype CSS
text-underline-position
property - Prototype Navigation Preload for Service Worker
- Prototype Constructable Stylesheet Objects
November 2019
- Prototype delegated permissions for third-party iframes via the
allow
attribute - Ship CSS Shadow Parts
- Ship CSS
translate
,scale
, androtate
properties (individual transforms) - Ship CSS Motion Paths
- Ship user interaction requirement for notification permission prompts
October 2019
- Ship CSS subgrid layout
- Experiment heading level based on outline depth
- Ship CSS
column-span
property - Experiment Web Speech API
- Experiment Web Share Target
- Ship: Infer
aspect-ratio
from imagewidth
/height
attributes
September 2019
- Ship CSS
text-decoration-skip-ink
,text-decoration-thickness
, andtext-underline-offset
properties - Ship event-based form participation (incl.
formdata
event) - Ship
X-Content-Type-Options: nosniff
for navigations
August 2019
- Ship CSS
clip-path: path()
values - Implement double-keyed HTTP cache
- Ship multi-keyword values for the CSS
display
property - Ship
inline list-item
andinline flow-root list-item
values for the CSSdisplay
property - Ship
block ruby
value for the CSSdisplay
property - Ship CSS
font-size: xxx-large
value - Implement CSS
text-decoration-skip-ink
property
July 2019
- Implement CSS
text-decoration-width
property - Ship percentage opacity values in CSS
- Implement and ship CSS
quotes: auto
value - Implement CSS
backdrop-filter
property - Experiment Web Share API
June 2019
- Experiment: Infer
aspect-ratio
from imagewidth
/height
attributes - Ship CSS
@supports selector()
function - Implement and ship
webkitURL
constructor (legacy compatibility alias ofURL
) - Implement and ship CSS
white-space: break-spaces
value - Implement and ship Resize Observer API
- Implement CSS
text-decoration-width
property - Implement CSS
text-underline-offset
property - Implement and ship CSS
overflow-block
andoverflow-inline
properties - Implement and ship
text
,arrayBuffer
, andstream
methods onBlob
interface
May 2019
- Implement and ship
queueMicrotask
function - Implement changes to cookies (add
SameSite=Lax
by default, requireSecure
forSameSite=None
) - Implement CSS
line-break
property - Ship Visual Viewport API on Android
April 2019
- Implement and ship
noreferrer
feature forwindow.open
method - Implement and ship
<link rel="stylesheet" disabled>
attribute - Implement and ship
preventScroll
option for thefocus
method
March 2019
- Implement and ship CSS
::marker
pseudo-element - Implement and ship CSS
counter-set
property - Ship CSS
contain
property - Ship JavaScript
import()
syntax for dynamic imports - Implement and ship CSS
revert
keyword - Implement and ship CSS Scroll Snap
February 2019
- Implement and ship CSS
prefers-color-scheme
media feature - Implement CSS
-webkit-line-clamp
property - Implement and ship
InputEvent
data
anddataTransfer
properties
January 2019
- Ship implicit
rel="noopener"
for<a target="_blank">
elements - Implement and ship CSS
border-block-color
, etc. properties and shorthands - Implement and ship CSS
border-start-start-radius
, etc. properties - Implement and ship CSS
inset
,inset-block
, andinset-inline
shorthands - Implement and ship CSS
margin-block
andmargin-inline
shorthands - Implement and ship CSS
padding-block
andpadding-inline
shorthands - Implement HTTP
Report-To
header (part of Reporting API)
December 2018
- Implement and ship CSS
overflow-inline
andoverflow-block
media features - Ship Storage Access API
- Ship
InputEvent
inputType
property - Implement and ship
s
modifier for attribute selectors - Implement and ship CSS
break-before
,break-after
, andbreak-inside
properties
November 2018
- Ship no
"keypress"
events when pressed key does not introduce text input - Ship
"keydown"
and"keyup"
events during IME composition - Implement implicit
rel="noopener"
for<a target="_blank">
elements - Implement CSS Scroll Anchoring
- Implement Reporting API (
ReportingObserver
) - Implement and ship CSS
overflow-wrap: anywhere
value - Implement and ship image
decode
method - Implement and ship CSS
env()
notation (environment variables)
October 2018
- Implement
<script referrerpolicy>
attribute - Implement JavaScript
import()
syntax for dynamic imports - Implement and ship
screenLeft
andscreenTop
properties (aliases forscreenX
andscreenY
) - Implement CSS
@supports
selector
function - Implement and ship WebP image format
September 2018
- Ship CSS
scrollbar-color
andscrollbar-width
properties - Implement and ship new cookie jar policy to block storage access from tracking resources
- Implement and ship
navigator.getDisplayMedia
method (Screen Capture) - Ship unprefixed Fullscreen API
- Implement Feature Policy
- Implement Storage Access API
August 2018
- Implement: “Treat
-webkit-
prefixed pseudo elements as valid CSS selectors” - Ship Custom Elements and Shadow DOM
- Implement and ship
block
andinline
values for the CSSresize
property - Ship CSS
-webkit-appearance
property - Ship Async Clipboard API
- Implement CSS
scrollbar-width
property - Implement CSS Motion Paths
- Implement and ship WebXR Device API (successor to WebVR)
- Implement and ship
HTMLMediaElement
allowedToPlay
property - Implement Visual Viewport API
July 2018
- Implement and ship
<img decoding>
attribute - Implement and ship CSS
prefers-reduced-motion
media feature (on Windows and macOS) - Ship HTTP
Clear-Site-Data
header - Ship Web Animations API (core interfaces)
- Implement CSS
scrollbar-face-color
andscrollbar-track-color
properties
June 2018
- Ship DOM
Element
toggleAttribute
method - Ship range context for CSS media queries (with limitations)
- Ship Storage API on Android (
persist
andestimate
methods) - Implement HTTP
Clear-Site-Data
header - Ship CSS
shape-outside
property
May 2018
- Ship speech synthesis on Android (part of Web Speech API)
- Implement and ship
import.meta
meta property in module scripts - Ship Media Capabilities API
- Implement Async Clipboard API
- Implement
AudioWorklet
interface (Web Audio API) - Ship
Event
srcElement
property (alias oftarget
property)
April 2018
- Ship Server Timing
- Implement
application/javascript+binast
(JavaScript Binary AST content encoding) - Ship CSS
overflow
shorthand (accepts two values) - Implement CSS subgrid layout (prototype)
- Implement and ship
SameSite
attribute for cookies
March 2018
- Ship OpenType variable fonts
February 2018
- Ship module scripts (
<script type="module">
) - Implement and ship
navigator.webdriver
(Boolean) property - Ship CSS
paint-order
property for HTML text
January 2018
- Ship CSS
overscroll-behavior
property
December 2017
- Implement CSS
paint-order
property for HTML text - Remove Ambient Light and Proximity Sensor APIs
- Implement CSS
translate
,scale
, androtate
properties (individual transforms) - Ship Web Authentication API (initially for FIDO U2F tokens)
November 2017
- Ship CSS Shapes
- Implement Custom Elements v1
- Implement Shadow DOM v1
- Ship stricter
X-Frame-Options: SAMEORIGIN
(check all ancestor frames) - Ship WebVTT regions
- Implement and ship (subclassable)
EventTarget
constructor - Ship CSP violation events
October 2017
- Implement CSS
overscroll-behavior
property - Ship Pointer Events on desktop
- Unship
preload
link relation (temporary) - Ship
"navigation"
performance entry (replacement fornavigation.timing
) - Ship “throttle timeouts in background tabs”
- Implement and ship Resource Timing
workerStart
property - Implement CSS interaction media features (
pointer
,hover
,any-pointer
,any-hover
) - Ship
<a ping>
attribute
September 2017
August 2017
July 2017
- Ship
preload
link relation
May 2017
- Ship HTTP
SourceMap
response header
March 2017
- Implement CSS
line-height-step
property - Implement and ship CSS
::cue
pseudo-element - Implement ScrollTimeline API (for creating scroll-linked animations)
- Ship Intersection Observer
- Ship CSS
frames()
timing function - Ship CSS
text-justify
property - Ship CSS
transform-box
property - Ship WebVR (on Windows)
February 2017
- Implement CSS
frames()
timing function - Implement and ship CSS
animationcancel
event - Implement and ship global
origin
property (self.origin
) - Implement CSS
text-justify
property - Ship basic shape values for CSS
clip-path
property (inset()
,circle()
,ellipse()
,polygon()
)
January 2017
- Ship new syntax of CSS color functions (e.g.
rgb(0 0 0 / 100%)
) - Implement and ship HTTP
Large-Allocation
header (non-standard) - Implement module scripts (
<script type="module">
) - Experiment CSS Houdini Paint API Level 1
December 2016
- Implement CSS box alignment properties on block containers
- Implement SVG
vector-effect
property (additional values) - Implement and ship CSS
caret-color
property - Implement HTML5
<dialog>
element - Implement and ship CSS
display: flow-root
value - Implement and ship Selection
setBaseAndExtent
method - Ship CSS
mask-image
property (repeated intent) - Ship Network Information API
- Implement “Store IndexedDB databases for the lifetime of private browsing sessions”
- Implement OpenType variable fonts
- Ship Presentation API (on Android)
November 2016
- Implement Web2Native Bridge
- Implement CSS
background-repeat-x
/background-repeat-y
andmask-repeat-x
/mask-repeat-y
properties - Implement Payment Request API
- Ship CSS Grid Layout
- Implement and ship Web Authentication API
- Ship
requestIdleCallback
function
October 2016
- Implement and ship
transitionrun
,transitionstart
, andtransitioncancel
events - Ship TLS 1.3 (draft 16)
- Implement CSS
shape-outside
property - Ship Selection API events (
selectionstart
,selectionchange
) - Ship CSS
touch-action
property (only Level 1 values)
September 2016
- Implement CSS
initial-letter
property - Implement and ship global
isSecureContext
property in workers - Ship Storage API
estimate
method - Implement Canvas 2d context
getTransform
/setTransform
methods
August 2016
- Ship Canvas 2D context
imageSmoothingEnabled
property - Implement
transitionstart
event - Implement and ship HTML
minlength
attribute andtooShort
validity state - Implement and ship
dataset
API on SVG elements
July 2016
- Implement and ship
forEach
method on NodeList and DOMTokenList - Ship Blink’s Entries API (
webkitGetAsEntry
method) incl. file inputwebkitdirectory
attribute - Ship (unprefixed) CSS
:any-link
pseudo-class - Implement MediaDevices
devicechange
event - Implement and ship MediaStreamTrack
getConstraints
andgetSettings
methods - Implement CSS Properties and Values API
- Implement and ship
once
option foraddEventListener
method - Implement and ship
__Secure-
/__Host-
cookie prefixes - Ship CSS
touch-action
property - Implement and ship “Force flattening of
transform-style: preserve-3d
when opacity is applied”
June 2016
- Implement and ship Service Worker
WindowClient.navigate
method - Ship CSS
mask-image
property
May 2016
- Ship filters in 2D canvas
- Ship unprefixed CSS
text-align-last
property - Implement and ship HTMLMediaElement
seekToNextFrame
method (non-standard) - Ship
PerformanceObserver
API - Unship HTML microdata API
- Implement and ship
space
/round
values for CSSbackground-repeat
property - Ship unprefixed CSS
:dir
pseudo-class - Implement and ship 8 and 4-digit hex color notation (#RRGGBBAA and #RGBA)
- Implement and ship “sandbox propagates to auxiliary browsing contexts” flag (
allow-popups-to-escape-sandbox
keyword) - Implement and ship “sandboxed modals” flag (
allow-modals
keyword) - Implement and ship passive event listeners (
passive
option) - Implement and ship
DOMTokenList.prototype.supports
property
April 2016
- Ship Speech Synthesis API
- Implement and ship
"noopener"
link relation - Ship “Restrict
geolocation.watchPosition
to secure contexts” - Ship basic shapes (
polygon
et al) for CSSclip-path
property - Implement
requestIdleCallback
function - Ship
Element.animate
method - Ship ParentNode
prepend
,append
,before
,after
,replaceWith
methods - Ship
document.scrollingElement
property - Ship “Treat cookies set over non-secure HTTP as session cookies”
- Ship HTML
<details>
and<summary>
elements - Implement and ship CSS
-webkit-text-stroke
property
March 2016
- Implement CSS
-webkit-background-clip: text
- Implement and ship CSS
text-combine-upright: all
- Ship
navigator.hardwareConcurrency
- Implement Credential Management API
- Ship CSS
color-adjust
property - Implement Push API in Firefox for Android
February 2016
- Implement and ship
IDBKeyRange.includes()
- Implement and ship
fetch()
referrer and Referrer Policy API
January 2016
- Implement and ship
document.elementsFromPoint
method
December 2015
- Implement and ship Support for a subset of
-webkit-
prefixed CSS properties and features - Implement One-off Background Sync API
- Ship
referrerpolicy
attribute - Implement and ship FIDO U2F API
November 2015
- Ship Service Workers with FetchEvent
- Implement HTML
<details>
and<summary>
elements - Implement and ship
Performance.translateTime
method - Ship CSS
unicode-range
descriptor - Implement and ship CSS Emphasis Marks (
text-emphasis
property) - Ship CSS Mask Image properties
- Ship Web Speech API - Synthesis
October 2015
- Ship WebVR
- Implement and ship
window.orientation
and'orientationchange'
event - Implement and ship
::backdrop pseudo-element
for Fullscreen API