This page summarizes groups mentioned throughout this document's pages, along with the name of the specifications and features that these groups are (or were) responsible for. Please refer to individual pages for details about the relevance and status of each work.

List of groups

GroupSpecificationMention
(historical) Web Applications Working GroupServer-Sent EventsServer-pushed Requests
in Network and Communications
The WebSocket APIBidirectional Connections
in Network and Communications
Web SQL Databasein Data Storage
Accessibility Guidelines Working GroupMobile Accessibility: How WCAG 2.0 and Other W3C/WAI Guidelines Apply to MobileAccessibility
in User Interaction
Web Content Accessibility Guidelines (WCAG) 2.1Accessibility
in User Interaction
Accessible Rich Internet Applications Working GroupAccessible Rich Internet Applications (WAI-ARIA) 1.1Accessibility
in User Interaction
Core Accessibility API Mappings 1.1Accessibility
in User Interaction
Audio Community GroupAudio Device ClientAudio playback
in Media
Audio Working GroupWeb Audio APIAudio playback
in Media
Authoring Tool Accessibility Guidelines Working GroupAuthoring Tool Accessibility Guidelines (ATAG) 2.0Accessibility
in User Interaction
Browser Testing and Tools Working GroupWebDriverAutomation
in Performance and Tuning
CSS Working GroupCSS Animation Worklet APIAnimation Optimization
in Performance and Tuning
CSS Animations Level 1Animations
in Graphics and Layout
Rounded corners in CSS Backgrounds and Borders Module Level 3Graphical effects
in Graphics and Layout
Box shadow effects in CSS Backgrounds and Borders Module Level 3Graphical effects
in Graphics and Layout
box-sizing property in CSS Basic User Interface Module Level 3 (CSS3 UI)Complex layouts
in Graphics and Layout
profiled device-dependent colors in CSS Color Module Level 4Rendering in different color spaces
in Media
CSS Containment Module Level 1Rendering performance
in Performance and Tuning
CSS Device Adaptation Module Level 1CSS-based adaptation
in Device Adaptation
CSS Flexible Box Layout Module Level 1Complex layouts
in Graphics and Layout
CSS Font Loading Module Level 3Downloadable fonts
in Graphics and Layout
font-display in CSS Fonts Module Level 4Downloadable fonts
in Graphics and Layout
Variable fonts in CSS Fonts Module Level 4Downloadable fonts
in Graphics and Layout
CSS Grid Layout Module Level 1Complex layouts
in Graphics and Layout
CSS Mobile Text Size Adjustment Module Level 1CSS-based adaptation
in Device Adaptation
CSS Overscroll Behavior Module Level 1Scrolling Optimization
in Performance and Tuning
CSS Painting API Level 1Graphics API
in Graphics and Layout
The ruby-align property in CSS Ruby Layout Module Level 1Complex layouts
in Graphics and Layout
The ruby-position property in CSS Ruby Layout Module Level 1Complex layouts
in Graphics and Layout
CSS Scoping Module Level 1JS-based adaptation
in Device Adaptation
CSS Scroll Snap Module Level 1Smooth scrolling
in User Interaction
CSS Shadow PartsJS-based adaptation
in Device Adaptation
2D effects in CSS Transforms Module Level 1Graphical effects
in Graphics and Layout
CSS TransitionsAnimations
in Graphics and Layout
viewport-percentage lengths in CSS Values and Units Module Level 3CSS-based adaptation
in Device Adaptation
CSS Will Change Module Level 1Smooth scrolling
in User Interaction
Rendering performance
in Performance and Tuning
CSSOM View ModuleSmooth scrolling
in User Interaction
Media QueriesCSS-based adaptation
in Device Adaptation
pointer feature in Media Queries Level 5CSS-based adaptation
in Device Adaptation
hover feature in Media Queries Level 5CSS-based adaptation
in Device Adaptation
prefers-contrast in Media Queries Level 5CSS-based adaptation
in Device Adaptation
prefers-color-scheme feature in Media Queries Level 5CSS-based adaptation
in Device Adaptation
prefers-reduced-motion feature in Media Queries Level 5CSS-based adaptation
in Device Adaptation
Resize ObserverJS-based adaptation
in Device Adaptation
Scroll-linked AnimationsAnimations
in Graphics and Layout
Web AnimationsAnimations
in Graphics and Layout
Chinese Web Interest GroupMiniApp Standardization White PaperMiniApps
in Application Lifecycle
Color on the Web Community GroupHigh Dynamic Range and Wide Gamut Color on the WebRendering in different color spaces
in Media
Devices and Sensors Working Group"MediaStream Image Capture"Capturing audio/video
in Media
AccelerometerMotion sensors
in Sensors and Local Interactions
Ambient Atmospheric Pressure (Barometric) Sensorin Sensors and Local Interactions
Ambient Humidity Eventsin Sensors and Local Interactions
Ambient Light SensorAmbient light sensors
in Sensors and Local Interactions
Ambient Temperature (Thermometer) sensorin Sensors and Local Interactions
Battery Status APIBattery status
in Sensors and Local Interactions
Battery Status
in Performance and Tuning
DeviceOrientation Event SpecificationMotion sensors
in Sensors and Local Interactions
Generic Sensor APIGeneric sensors
in Sensors and Local Interactions
Geolocation SensorGeolocation
in Sensors and Local Interactions
Geofencing
in Application Lifecycle
GyroscopeMotion sensors
in Sensors and Local Interactions
HTML Media CaptureCapturing audio/video
in Media
MagnetometerMotion sensors
in Sensors and Local Interactions
MediaStream RecordingCapturing audio/video
in Media
Network Service Discoveryin Media
Orientation SensorMotion sensors
in Sensors and Local Interactions
Proximity SensorProximity sensors
in Sensors and Local Interactions
Vibration API (Second Edition)Vibration
in User Interaction
Wake Lock APIScreen wake
in User Interaction
Geolocation Working GroupGeofencing APIin Sensors and Local Interactions
in Application Lifecycle
Geolocation API Specification 2nd EditionGeolocation
in Sensors and Local Interactions
GPU for the Web Working GroupWebGPUGraphics API
in Graphics and Layout
WebGPU Shading LanguageGraphics API
in Graphics and Layout
Hardware Based Secure Services Community GroupHardware Based Secure Services featuresin Security and Privacy
Immersive Web Community GroupWebVRin Media
Immersive Web Working GroupWebXR Augmented Reality Module - Level 1Rendering in VR/AR headsets
in Media
WebXR Device APIRendering in VR/AR headsets
in Media
WebXR Gamepads Module - Level 1Rendering in VR/AR headsets
in Media
Independent User Interface (Indie UI) Working GroupIndieUI: Events 1.0in User Interaction
Khronos GroupWebGL SpecificationGraphics API
in Graphics and Layout
Media Working GroupAutoplay Policy DetectionAutoplay
in Media
Encrypted Media ExtensionsProtected content playback
in Media
Media CapabilitiesCapabilities and quality
in Media
Media Playback QualityCapabilities and quality
in Media
Media Session StandardMedia focus
in Media
Media Source Extensions?Generation of media content
in Media
Picture-in-PictureDistributed rendering
in Media
Mobile Web Best Practices Working GroupMobile Web Application Best PracticesOptimization Best Practices
in Performance and Tuning
Multi-Device Timing Community GroupTiming ObjectDistributed rendering
in Media
Pointer Events Working GroupPointer EventsTouch-based interactions
in User Interaction
touch-action in Pointer EventsTouch-based interactions
in User Interaction
Privacy Community GroupFirst-Party SetsStrengthened privacy
in Security and Privacy
IsLoggedInStrengthened privacy
in Security and Privacy
JS Isolation via Origin Labels and MembranesStrengthened privacy
in Security and Privacy
Private Click MeasurementStrengthened privacy
in Security and Privacy
The Storage Access APIStorage management
in Data Storage
Strengthened privacy
in Security and Privacy
Second Screen Working GroupOpen Screen ProtocolDistributed rendering
in Media
Presentation APIDistributed rendering
in Media
Remote Playback APIDistributed rendering
in Media
Service Workers Working GroupService Workers 1Offline Web Apps
in Application Lifecycle
Caching
in Performance and Tuning
SVG Working GroupScalable Vector Graphics (SVG) 1.1 (Second Edition)2D Vector Graphics
in Graphics and Layout
Responsive images
in Device Adaptation
Scalable Vector Graphics (SVG) 22D Vector Graphics
in Graphics and Layout
Web AnimationsAnimations
in Graphics and Layout
System Applications Working GroupContacts Manager APIin Data Storage
Task Scheduler API Specificationin Application Lifecycle
Tracking Protection Working GroupTracking Preference Expression (DNT)in Security and Privacy
User Agent Accessibility Guidelines Working GroupMobile Accessibility: How WCAG 2.0 and Other W3C/WAI Guidelines Apply to MobileAccessibility
in User Interaction
UAAG 2.0 Reference: Explanations, Examples, and Resources for User Agent Accessibility Guidelines 2.0Accessibility
in User Interaction
User Agent Accessibility Guidelines (UAAG) 2.0Accessibility
in User Interaction
Web Application Security Working GroupContent Security Policy Level 2Strengthened security
in Security and Privacy
Credential Management Level 1Identity Management
in Security and Privacy
Entry Point Regulationin Security and Privacy
Mixed ContentStrengthened security
in Security and Privacy
PermissionsPermissions
in Security and Privacy
Permissions PolicyPermissions policy
in Security and Privacy
Referrer PolicyReferrer Policy
in Security and Privacy
Secure ContextsSecure contexts
in Security and Privacy
Subresource IntegrityStrengthened security
in Security and Privacy
Upgrade Insecure RequestsHTTPs adoption
in Security and Privacy
User Interface Security and the Visibility APISandboxing
in Security and Privacy
Web Applications Working GroupBadging APINotification
in User Interaction
Packing
in Application Lifecycle
Clipboard API and eventsClipboard
in Forms
File APIFile operations
in Data Storage
GamepadGame controllers
in User Interaction
Intersection ObserverInfinite scrolling
in Performance and Tuning
Push APINotification
in User Interaction
Server-pushed Requests
in Network and Communications
Remote Notifications
in Application Lifecycle
The Screen Orientation APIOrientation Lock
in Sensors and Local Interactions
Web App ManifestPacking
in Application Lifecycle
Web App Manifest - Application InformationPacking
in Application Lifecycle
Web Share APISharing content
in Application Lifecycle
Web Share Target APISharing content
in Application Lifecycle
Web Authentication Working GroupWeb Authentication:An API for accessing Public Key Credentials Level 2Authentication
in Security and Privacy
Web Bluetooth Community GroupWeb BluetoothBluetooth
in Sensors and Local Interactions
Web Cryptography Working GroupWeb Cryptography APIEncrypted storage
in Data Storage
Encryption
in Security and Privacy
WebCrypto Key DiscoveryEncrypted storage
in Data Storage
Encryption
in Security and Privacy
Web Events Working GroupTouch EventsTouch-based interactions
in User Interaction
Web Fonts Working GroupWOFF File Format 2.0Downloadable fonts
in Graphics and Layout
Web NFC Community GroupWeb NFC APINFC
in Sensors and Local Interactions
Web Payments Working GroupPayment Handler APIWeb Payment
in Payment and Services
Payment Method IdentifiersWeb Payment
in Payment and Services
Payment Method ManifestWeb Payment
in Payment and Services
Payment Method: Basic CardWeb Payment
in Payment and Services
Payment Request APIWeb Payment
in Payment and Services
Web Performance Working GroupBeaconHTTP Network API
in Network and Communications
Cooperative Scheduling of Background TasksPriority Handling
in Performance and Tuning
Device MemoryServer-side adaptation
in Device Adaptation
High Resolution Time Level 2Timing Hooks
in Performance and Tuning
Long Tasks API 1Timing Hooks
in Performance and Tuning
Navigation Timing Level 2Timing Hooks
in Performance and Tuning
Page Visibility Level 2Foreground Detection
in Application Lifecycle
Page Visibility Detection
in Performance and Tuning
Paint Timing 1Timing Hooks
in Performance and Tuning
Performance Timeline Level 2Timing Hooks
in Performance and Tuning
PreloadNetwork Prioritization
in Performance and Tuning
Resource HintsNetwork Prioritization
in Performance and Tuning
Resource Timing Level 2Network Characteristics
in Network and Communications
Timing Hooks
in Performance and Tuning
Server TimingTiming Hooks
in Performance and Tuning
Timing Entry Names RegistryTiming Hooks
in Performance and Tuning
User Timing Level 2Timing Hooks
in Performance and Tuning
Web Platform Incubator Community GroupA built-in virtual scroller for the web platformInfinite scrolling
in Performance and Tuning
Accelerated Shape Detection in ImagesVideo processing
in Media
Background FetchBackground execution
in Network and Communications
in Application Lifecycle
Constructable Stylesheet ObjectsJS-based adaptation
in Device Adaptation
Cookie Store APIState management
in Data Storage
Display LockingDOM Updates
in Performance and Tuning
Element Timing APITiming hooks
in Performance and Tuning
Event Timing APITiming hooks
in Performance and Tuning
Frame TimingTiming hooks
in Performance and Tuning
Input Device CapabilitiesTouch-based interactions
in User Interaction
Input for Workers and WorkletsInput latency
in User Interaction
isInputPendingResponsiveness
in User Interaction
in Performance and Tuning
JS Self-Profiling APIJS performance
in Performance and Tuning
KV StorageSimple data storage
in Data Storage
Layout InstabilityTiming hooks
in Performance and Tuning
scheduler.yield() in Main-thread Scheduling APIResponsiveness
in Performance and Tuning
scheduler.postTask() in Main-thread Scheduling APIResponsiveness
in Performance and Tuning
Native File SystemFile operations
in Data Storage
Network Information APINetwork Characteristics
in Network and Communications
Page LifecycleState transition
in Application Lifecycle
performance.measureMemory APIMemory usage
in Performance and Tuning
PortalsSeamless navigation
in Application Lifecycle
Priority HintsNetwork Prioritization
in Performance and Tuning
Relinquishing PermissionsPermissions
in Security and Privacy
Requesting PermissionsPermissions
in Security and Privacy
requestPostAnimationFrameDOM Updates
in Performance and Tuning
SPARROWStrengthened privacy
in Security and Privacy
Storage BucketsStorage management
in Data Storage
Trust Token APIStrengthened privacy
in Security and Privacy
TURTLEDOVEStrengthened privacy
in Security and Privacy
User Idle DetectionState transition
in Application Lifecycle
User-Agent Client HintsServer-side adaptation
in Device Adaptation
Visual Viewport APIJS-based adaptation
in Device Adaptation
Web Background SynchronizationBackground execution
in Network and Communications
in Application Lifecycle
Web Budget APIin Application Lifecycle
Web Locks APIShared resources
in Data Storage
in Application Lifecycle
Web MonetizationContinuous payments
in Payment and Services
Web PackagingPacking
in Application Lifecycle
Speech synthesis in Web Speech APISpeech-based interactions
in User Interaction
Speech recognition in Web Speech APISpeech-based interactions
in User Interaction
WebCodecsVideo processing
in Media
WebHID APIGame controllers
in User Interaction
Web Platform Working Groupinputmode attribute in HTML 5.1 2nd Editionin Forms
ApplicationCache in HTML 5.1 2nd Editionin Application Lifecycle
Indexed Database API 2.0Database query/update
in Data Storage
Input Method Editor APIInput method
in User Interaction
Quota Management APIin Data Storage
Web Storage (Second Edition)Simple data storage
in Data Storage
WebRTC Working Group"MediaStream Image Capture"Capturing audio/video
in Media
Audio Output Devices APIDistributed rendering
in Media
Identifiers for WebRTC's Statistics APIReal-time Communication
in Performance and Tuning
Source capabilities in Media Capture and StreamsMedia Capture Capabilities
in Device Adaptation
Media Capture and StreamsCapturing audio/video
in Media
Camera & Microphone streams
in Sensors and Local Interactions
MediaStream RecordingCapturing audio/video
in Media
MediaStreamTrack Content HintsP2P and audio/video streams
in Media
Scalable Video Coding (SVC) Extension for WebRTCP2P and audio/video streams
in Media
WebRTC 1.0: Real-time Communication Between BrowsersP2P and audio/video streams
in Media
P2P Data Connections
in Network and Communications
WebAssembly Working GroupWebAssembly Core SpecificationLow-level Bytecode Format
in Performance and Tuning
WebTransport Working GroupWebTransportBidirectional Connections
in Network and Communications
WHATWGShadow tree in DOM StandardJS-based adaptation
in Device Adaptation
Passive event listeners in DOM StandardScrolling Optimization
in Performance and Tuning
Fetch StandardHTTP Network API
in Network and Communications
CORS protocol in Fetch StandardCross-domain Requests
in Network and Communications
Fullscreen API Standardin Graphics and Layout
requestAnimationFrame in HTML StandardAnimations
in Graphics and Layout
Animation Optimization
in Performance and Tuning
The ruby element in HTML StandardComplex layouts
in Graphics and Layout
The 2D rendering context in HTML StandardGraphics API
in Graphics and Layout
Image/Video edition
in Media
picture element in HTML StandardResponsive images
in Device Adaptation
srcset attribute in HTML StandardResponsive images
in Device Adaptation
The template element in HTML StandardJS-based adaptation
in Device Adaptation
Custom elements in HTML StandardJS-based adaptation
in Device Adaptation
Integration with the JavaScript module system in HTML StandardJS-based adaptation
in Device Adaptation
tel, email, url input types in HTML StandardCustomized text entries
in Forms
Date and time input types in HTML StandardCustomized text entries
in Forms
pattern attribute for input fields in HTML StandardInput validation
in Forms
input placeholder attribute in HTML StandardInput hint
in Forms
datalist element in HTML StandardForm autocomplete
in Forms
autocomplete attribute in HTML StandardForm autocomplete
in Forms
in Data Storage
Autocomplete
in Payment and Services
download attribute in HTML StandardFile download
in Data Storage
video element in HTML StandardAudio/Video playback
in Media
audio element in HTML StandardAudio/Video playback
in Media
onLine DOM flag in HTML StandardOn-line State
in Network and Communications
Web workers in HTML StandardThreading
in Performance and Tuning
sandbox iframe attribute in HTML StandardStrengthened security
in Security and Privacy
Notifications API StandardNotification
in User Interaction
Storage StandardStorage management
in Data Storage
Streams StandardLow-level I/O
in Network and Communications
XMLHttpRequest StandardHTTP Network API
in Network and Communications