Terms starting with letter f

Color key: WebIDL CSS Markup HTTP

DOMMatrix.f (WebIDL attribute) §
DOMMatrixReadOnly.f (WebIDL attribute) §: Defined in Geometry Interfaces 1
DOMMatrix2DInit.f (WebIDL dictionary member) §: Defined in Geometry Interfaces 1
"f32" (value for ValueType WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Content Security Policy , WebAssembly JavaScript Interface: Exception Handling , WebAssembly JavaScript Interface: Promise Integration , WebAssembly JavaScript Interface: Type Reflection , WebAssembly JavaScript Interface: Threading , WebAssembly JavaScript Interface
"f32" (value for AudioSampleFormat WebIDL enumeration) §: Defined in WebCodecs; Referenced in Linear PCM WebCodecs Registration
"f32-planar" (value for AudioSampleFormat WebIDL enumeration) §: Defined in WebCodecs
"f64" (value for ValueType WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Content Security Policy , WebAssembly JavaScript Interface: Exception Handling , WebAssembly JavaScript Interface: Promise Integration , WebAssembly JavaScript Interface: Type Reflection , WebAssembly JavaScript Interface: Threading , WebAssembly JavaScript Interface
HTMLFontElement.face (WebIDL attribute) §: Defined in HTML
FaceDetector (WebIDL interface) §: Defined in Accelerated Shape Detection in Images; Related terms: new FaceDetector(faceDetectorOptions), FaceDetector.detect(image); see also WebIDLPedia
new FaceDetector(faceDetectorOptions) (WebIDL constructor) §: Defined in Accelerated Shape Detection in Images
FaceDetectorOptions (WebIDL dictionary) §: Defined in Accelerated Shape Detection in Images; Related terms: FaceDetectorOptions.fastMode, FaceDetectorOptions.maxDetectedFaces; see also WebIDLPedia
Facing Pages (concept) §: Defined in CSS Paged Media 3
MediaTrackCapabilities.facingMode (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackConstraintSet.facingMode (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSettings.facingMode (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSupportedConstraints.facingMode (WebIDL dictionary member) §: Defined in Media Capture and Streams
MockCameraConfiguration.facingMode (WebIDL dictionary member) §: Defined in Media Capture Automation
fade (CSS value for text-overflow ) §: Defined in CSS Overflow 4
fade() (CSS function for text-overflow ) §: Defined in CSS Overflow 4
"fail" (value for PaymentComplete WebIDL enumeration) §: Defined in Payment Request API 1.1
"failed" (value for RTCStatsIceCandidatePairState WebIDL enumeration) §: Defined in WebRTC Statistics
"failed" (value for RTCPeerConnectionState WebIDL enumeration) §: Defined in WebRTC 1.0
"failed" (value for RTCIceConnectionState WebIDL enumeration) §: Defined in WebRTC 1.0
"failed" (value for RTCDtlsTransportState WebIDL enumeration) §: Defined in WebRTC 1.0
"failed" (value for RTCIceTransportState WebIDL enumeration) §: Defined in WebRTC 1.0
FontFaceSet.[[FailedFonts]] (internal slot) §: Defined in CSS Font Loading 3
GPUStencilFaceState.failOp (WebIDL dictionary member) §: Defined in WebGPU
failover class (concept) §: Defined in Network Reporting API
"failure" (value for BackgroundFetchResult WebIDL enumeration) §: Defined in Background Fetch
BackgroundFetchRegistration.failureReason (WebIDL attribute) §: Defined in Background Fetch
endpoint.failures (WebIDL attribute) §: Defined in Reporting API; Referenced in Network Reporting API
"fair" (value for PressureState WebIDL enumeration) §: Defined in Compute Pressure 1
[[fallback]] (internal slot for adapter ) §: Defined in WebGPU
fallback (CSS descriptor for @counter-style ) §: Defined in CSS Counter Styles 3
fallback (CSS value for font-display descriptor of @font-face @rule ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
fallback (concept) §: Defined in CSS Sizing 3; Referenced in CSS Writing Modes 3, CSS Writing Modes 4
fallback (CSS value for stroke-linejoin ) §: Defined in CSS Fill and Stroke 3
CSSCounterStyleRule.fallback (WebIDL attribute) §: Defined in CSS Counter Styles 3
CSSVariableReferenceValue.fallback (WebIDL attribute) §: Defined in CSS Typed OM 1
fallback alignment (concept) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Grid Layout 1, CSS Grid Layout 2
'false' (concept) §: Defined in CSS Conditional Values 1
false (value for contenteditable attribute of html-global ) §: Defined in HTML
false (value for spellcheck attribute of html-global ) §: Defined in HTML
false (value for writingsuggestions attribute of html-global ) §: Defined in HTML
false (value for draggable attribute of html-global ) §: Defined in HTML
false (CSS value for @custom-media ) §: Defined in Media Queries 5; Referenced in CSS Conditional Values 1, CSS Containment 3, CSS Round Display 1, Filter Effects 1
FontData.family (WebIDL attribute) §: Defined in Local Font Access
FontFace.family (WebIDL attribute) §: Defined in CSS Font Loading 3
<family-name> (CSS type) §: Defined in CSS Fonts 4 , CSS 2.2; Referenced in CSS Fonts 5, CSS Speech 1, CSSOM
family-name (value for autocomplete attribute of button element, autocomplete attribute of fieldset element, autocomplete attribute of input element, autocomplete attribute of object element, autocomplete attribute of output element, autocomplete attribute of select element, autocomplete attribute of textarea element ) §: Defined in HTML
fantasy (CSS value for <generic-family>, font-family property ) §: Defined in CSS Fonts 4 , CSS 2.2; Referenced in CSS Snapshot 2023
fantasy (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
farthest-corner (CSS value for <radial-extent>, radial-gradient() function, repeating-radial-gradient() function ) §: Defined in CSS Images 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
farthest-corner (CSS value for <ray-size> ) §: Defined in Motion Path 1
farthest-side (CSS value for <radial-extent>, radial-gradient() function, repeating-radial-gradient() function ) §: Defined in CSS Images 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
farthest-side (CSS value for <ray-size> ) §: Defined in Motion Path 1
fast (CSS value for voice-rate ) §: Defined in CSS Speech 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fast (CSS value for update descriptor of @media @rule ) §: Defined in Media Queries 4 , Media Queries 5; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
FaceDetectorOptions.fastMode (WebIDL dictionary member) §: Defined in Accelerated Shape Detection in Images
fastSeek (WebIDL dictionary member for MediaSessionActionSeekToDetails ) §: Defined in Media Session
MediaSessionSeekToActionDetails.fastSeek (WebIDL dictionary member) §: Defined in Media Session
HTMLMediaElement.fastSeek(time) (WebIDL operation) §: Defined in HTML; Referenced in Media Capture and Streams, Open Screen Protocol, Remote Playback API
TextDecoderCommon.fatal (WebIDL attribute) §: Defined in Encoding
TextDecoderOptions.fatal (WebIDL dictionary member) §: Defined in Encoding
fax (value for autocomplete attribute of button element, autocomplete attribute of fieldset element, autocomplete attribute of input element, autocomplete attribute of object element, autocomplete attribute of output element, autocomplete attribute of select element, autocomplete attribute of textarea element ) §: Defined in HTML
Featural syllabary (concept) §: Defined in Internationalization Glossary
feature (concept) §: Defined in User Timing
<feature-tag-value> (CSS value for font-feature-settings ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
<feature-value-name> (CSS type) §: Defined in CSS Fonts 4
PermissionsPolicyViolationReportBody.featureId (WebIDL attribute) §: Defined in Permissions Policy
featureless (concept) §: Defined in Selectors 4; Referenced in CSS Nesting, CSS Scoping 1
HIDCollectionInfo.featureReports (WebIDL dictionary member) §: Defined in WebHID API
[[features]] (internal slot for adapter ) §: Defined in WebGPU
[[features]] (internal slot for device ) §: Defined in WebGPU
FontFace.features (WebIDL attribute) §: Defined in CSS Font Loading 3
GPUAdapter.features (WebIDL attribute) §: Defined in WebGPU
GPUDevice.features (WebIDL attribute) §: Defined in WebGPU
PermissionsPolicy.features() (WebIDL operation) §: Defined in Permissions Policy
FontFace.featureSettings (WebIDL attribute) §: Defined in CSS Font Loading 3
FontFaceDescriptors.featureSettings (WebIDL dictionary member) §: Defined in CSS Font Loading 3
feBlend (markup element) §: Defined in Filter Effects 1
RTCInboundRtpStreamStats.fecBytesReceived (WebIDL dictionary member) §: Defined in WebRTC Statistics
feColorMatrix (markup element) §: Defined in Filter Effects 1
feComponentTransfer (markup element) §: Defined in Filter Effects 1
feComposite (markup element) §: Defined in Filter Effects 1
feConvolveMatrix (markup element) §: Defined in Filter Effects 1
RTCInboundRtpStreamStats.fecPacketsDiscarded (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.fecPacketsReceived (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.fecSsrc (WebIDL dictionary member) §: Defined in WebRTC Statistics
CredentialCreationOptions.federated (WebIDL dictionary member) §: Defined in Credential Management 1
CredentialRequestOptions.federated (WebIDL dictionary member) §: Defined in Credential Management 1
FederatedCredential.federated (WebIDL constant) §: Defined in Credential Management 1
FederatedCredential (WebIDL interface) §: Defined in Credential Management 1; Related terms: FederatedCredential.protocol, FederatedCredential.provider, FederatedCredential.federated, new FederatedCredential(data), FederatedCredential.[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors), FederatedCredential.[[Create]](origin, options, sameOriginWithAncestors), FederatedCredential.[[Store]](credential, sameOriginWithAncestors); see also WebIDLPedia
new FederatedCredential(data) (WebIDL constructor) §: Defined in Credential Management 1
FederatedCredentialInit (WebIDL dictionary) §: Defined in Credential Management 1; Related terms: FederatedCredentialInit.iconURL, FederatedCredentialInit.name, FederatedCredentialInit.origin, FederatedCredentialInit.protocol, FederatedCredentialInit.provider; see also WebIDLPedia
FederatedCredentialRequestOptions (WebIDL dictionary) §: Defined in Credential Management 1; Related terms: FederatedCredentialRequestOptions.protocols, FederatedCredentialRequestOptions.providers; see also WebIDLPedia
feDiffuseLighting (markup element) §: Defined in Filter Effects 1
feDisplacementMap (markup element) §: Defined in Filter Effects 1
feDistantLight (markup element) §: Defined in Filter Effects 1
feDropShadow (markup element) §: Defined in Filter Effects 1
IIRFilterOptions.feedback (WebIDL dictionary member) §: Defined in Web Audio API
IIRFilterOptions.feedforward (WebIDL dictionary member) §: Defined in Web Audio API
feFlood (markup element) §: Defined in Filter Effects 1
feFuncA (markup element) §: Defined in Filter Effects 1
feFuncB (markup element) §: Defined in Filter Effects 1
feFuncG (markup element) §: Defined in Filter Effects 1
feFuncR (markup element) §: Defined in Filter Effects 1
feGaussianBlur (markup element) §: Defined in Filter Effects 1
feImage (markup element) §: Defined in Filter Effects 1; Referenced in CSS Images 3
female (CSS value for voice-family ) §: Defined in CSS Speech 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
feMerge (markup element) §: Defined in Filter Effects 1
feMergeNode (markup element) §: Defined in Filter Effects 1
feMorphology (markup element) §: Defined in Filter Effects 1
Fence (WebIDL interface) §: Defined in Fenced Frame; Related terms: Fence.getNestedConfigs(), Fence.reportEvent(event), Fence.setReportEventDataForAutomaticBeacons(event); see also WebIDLPedia
fence (markup attribute for mo ) §: Defined in MathML Core
fence (WebIDL attribute for Window ) §: Defined in Fenced Frame
fenced frame config (concept) §: Defined in Fenced Frame; Referenced in Shared Storage API, Protected Audience; Related terms: concept container size, concept content size, concept effective enabled permissions, concept effective sandbox flags, concept embedder shared storage context, concept exfiltration budget metadata, concept fenced frame reporting metadata, concept interest group descriptor, concept is ad component, concept mapped url, concept nested configs, concept on navigate callback
fenced frame config instance (concept) §: Defined in Fenced Frame; Related terms: concept container size, concept content size, concept effective enabled permissions, concept effective sandbox flags, concept embedder shared storage context, concept exfiltration budget metadata reference, concept fenced frame reporter, concept interest group descriptor, concept is ad component, concept mapped url, concept nested configs, concept on navigate callback, concept partition nonce
fenced frame config mapping (concept for traversable navigable ) §: Defined in Fenced Frame; Referenced in Shared Storage API, Protected Audience; Related terms: concept finalize a pending config, concept find a config, concept store a pending config, concept store nested configs
fenced frame reporter (concept for fencedframetype ) §: Defined in Fenced Frame; Referenced in Shared Storage API
fenced frame reporter (concept for fenced frame config instance ) §: Defined in Fenced Frame
fenced frame reporting map (concept for fencedframetype ) §: Defined in Fenced Frame; Referenced in Protected Audience
fenced frame reporting map (concept for fenced frame reporting metadata ) §: Defined in Fenced Frame; Referenced in Protected Audience
fenced frame reporting metadata (concept for fencedframetype ) §: Defined in Fenced Frame
fenced frame reporting metadata (concept for fenced frame config ) §: Defined in Fenced Frame; Referenced in Protected Audience
fenced frame reporting metadata reference (concept for fenced frame reporter ) §: Defined in Fenced Frame
fenced-frame (concept for Supports-Loading-Mode ) §: Defined in Fenced Frame
fencedframe (markup element) §: Defined in Fenced Frame; Referenced in Protected Audience; Related terms: markup attribute allow, markup attribute height, markup attribute width
FencedFrameConfig (WebIDL interface) §: Defined in Fenced Frame; Referenced in Shared Storage API, Protected Audience; Related terms: FencedFrameConfig.containerHeight, FencedFrameConfig.containerWidth, FencedFrameConfig.contentHeight, FencedFrameConfig.contentWidth, FencedFrameConfig.setSharedStorageContext(contextString); see also WebIDLPedia
FencedFrameConfigSize (WebIDL type alias) §: Defined in Fenced Frame; see also WebIDLPedia
FencedFrameConfigURL (WebIDL type alias) §: Defined in Fenced Frame; see also WebIDLPedia
FenceEvent (WebIDL dictionary) §: Defined in Fenced Frame; Referenced in Shared Storage API; Related terms: FenceEvent.crossOriginExposed, FenceEvent.destination, FenceEvent.destinationURL, FenceEvent.eventData, FenceEvent.eventType, FenceEvent.once; see also WebIDLPedia
FenceReportingDestination (WebIDL enumeration) §: Defined in Fenced Frame; Related terms: value buyer, value component-seller, value direct-seller, value seller, value shared-storage-select-url; see also WebIDLPedia
feOffset (markup element) §: Defined in Filter Effects 1
fePointLight (markup element) §: Defined in Filter Effects 1
feSpecularLighting (markup element) §: Defined in Filter Effects 1
feSpotLight (markup element) §: Defined in Filter Effects 1
fetch (concept) §: Defined in Fetch; Referenced in Federated Credential Management API, HTML, MIME Sniffing, Notifications API, Source Map, WebSockets, Attribution Reporting, Background Fetch, Client Hints Infrastructure, Content Index, Cookie Store API, Fenced Frame, Prefetch, Speculation Rules, Private Network Access, Responsive Image Client Hints, Shared Storage API, Protected Audience, Loading Signed Exchanges, Web Application Manifest, Beacon, Content Security Policy 3, CSS Fonts 4, CSS Values 4, CSSOM, File API, Image Resource, Media Session, MiniApp Packaging, Navigation Timing 2, Payment Method Identifiers, Payment Method Manifest, Referrer Policy, Reporting API, Resource Timing, Service Workers, Upgrade Insecure Requests, WebTransport, XMLHttpRequest; Related terms: concept fetch group, concept processEarlyHintsResponse, concept processRequestBodyChunkLength, concept processRequestEndOfBody, concept processResponse, concept processResponseConsumeBody, concept processResponseEndOfBody, concept resumed, concept suspend, concept useParallelQueue
fetch (event for ServiceWorkerGlobalScope ) §: Defined in Service Workers; Referenced in Fetch, Streams
fetch a classic script (concept) §: Defined in HTML; Referenced in Fetch
fetch a classic worker script (concept) §: Defined in HTML; Referenced in Service Workers
fetch a classic worker-imported script (concept) §: Defined in HTML; Referenced in Service Workers
fetch a CSS style sheet (concept) §: Defined in CSSOM
fetch a module worker script graph (concept) §: Defined in HTML; Referenced in Service Workers
fetch a style resource (concept) §: Defined in CSS Values 4; Referenced in CSS Shapes 2, Fetch, CSS Cascading 4, CSS Color 5, CSS Fonts 4
fetch an @import (concept) §: Defined in CSS Cascading 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fetch an external color profile (concept) §: Defined in CSS Color 5
fetch an external image for a stylesheet (concept) §: Defined in CSS Images 4
fetch an external module script graph (concept) §: Defined in HTML
fetch controller (concept) §: Defined in Fetch; Referenced in HTML, Prefetch, Speculation Rules, Service Workers, XMLHttpRequest; Related terms: concept abort, concept extract full timing info, concept process the next manual redirect, concept report timing, concept serialized abort reason, concept state, concept terminate
fetch controller (concept for prefetch record ) §: Defined in Prefetch
Fetch directives (concept) §: Defined in Content Security Policy 3
fetch event dispatch time (concept for service worker timing info ) §: Defined in Service Workers
fetch group (concept for fetch ) §: Defined in Fetch; Related terms: concept fetch record, concept terminated
fetch index (algorithm) §: Defined in WebGPU
fetch metadata headers (concept) §: Defined in Fetch Metadata
Fetch options (concept for script ) §: Defined in HTML
fetch payment method manifests (concept) §: Defined in Payment Method Manifest
fetch record (concept for fetch group ) §: Defined in Fetch; Related terms: concept controller, concept request
fetch scheme (concept) §: Defined in Fetch; Referenced in HTML, Prefetch
fetch the web app manifest for a default payment app (concept) §: Defined in Payment Method Manifest
fetch timing info (concept) §: Defined in Fetch; Referenced in HTML, WebDriver BiDi, Resource Timing; Related terms: concept end time, concept final connection timing info, concept final network-request start time, concept final network-response start time, concept final service worker start time, concept first interim network-response start time, concept post-redirect start time, concept redirect end time, concept redirect start time, concept render-blocking, concept server-timing headers, concept start time
"fetch-error" (value for BackgroundFetchFailureReason WebIDL enumeration) §: Defined in Background Fetch
"fetch-event" (value for RouterSourceEnum WebIDL enumeration) §: Defined in Service Workers
BackgroundFetchManager.fetch(id, requests, options) (WebIDL operation) §: Defined in Background Fetch; Referenced in Prerendering Revamped
WindowOrWorkerGlobalScope.fetch(input, init) (WebIDL operation) §: Defined in Fetch; Referenced in HTML, Topics API, Streams, Web IDL, Protected Audience, Loading Signed Exchanges, Credential Management 1, Resource Timing, Service Workers
FetchEvent (WebIDL interface) §: Defined in Service Workers; Referenced in Content Index, Loading Signed Exchanges; Related terms: FetchEvent.clientId, FetchEvent.handled, FetchEvent.preloadResponse, FetchEvent.replacesClientId, FetchEvent.request, FetchEvent.resultingClientId, new FetchEvent(type, eventInitDict), FetchEvent.respondWith(r); see also WebIDLPedia
new FetchEvent(type, eventInitDict) (WebIDL constructor) §: Defined in Service Workers
FetchEventInit (WebIDL dictionary) §: Defined in Service Workers; Related terms: FetchEventInit.clientId, FetchEventInit.handled, FetchEventInit.preloadResponse, FetchEventInit.replacesClientId, FetchEventInit.request, FetchEventInit.resultingClientId; see also WebIDLPedia
fetching an image resource (concept) §: Defined in Image Resource; Referenced in Secure Payment Confirmation
fetchpriority (markup attribute for link ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0; Related terms: value auto, value high, value low
fetchpriority (markup attribute for img ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0; Related terms: value auto, value high, value low
fetchpriority (markup attribute for script ) §: Defined in HTML; Referenced in Attribution Reporting, HTML Accessibility API Mappings 1.0; Related terms: value auto, value high, value low
HTMLImageElement.fetchPriority (WebIDL attribute) §: Defined in HTML
HTMLLinkElement.fetchPriority (WebIDL attribute) §: Defined in HTML
HTMLScriptElement.fetchPriority (WebIDL attribute) §: Defined in HTML
PerformanceResourceTiming.fetchStart (WebIDL attribute) §: Defined in Resource Timing
PerformanceTiming.fetchStart (WebIDL attribute) §: Defined in Navigation Timing 2
feTile (markup element) §: Defined in Filter Effects 1
feTurbulence (markup element) §: Defined in Filter Effects 1
AnalyserNode.fftSize (WebIDL attribute) §: Defined in Web Audio API
AnalyserOptions.fftSize (WebIDL dictionary member) §: Defined in Web Audio API
Document.fgColor (WebIDL attribute) §: Defined in HTML
fictional tag sequence (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Field (CSS value for <color>, <system-color> type ) §: Defined in CSS Color 4
field-based time format (concept) §: Defined in Internationalization Glossary
field-sizing (CSS property) §: Defined in CSS User Interface 4; Related terms: CSS value content, CSS value fixed
fieldset (markup element) §: Defined in HTML; Referenced in CSS Display 4, CSS Display 3, HTML Accessibility API Mappings 1.0, ARIA in HTML, WAI-ARIA, WAI-ARIA; Related terms: concept form owner, markup attribute autocomplete, markup attribute disabled, markup attribute disabled, markup attribute form, markup attribute name
FieldText (CSS value for <color>, <system-color> type ) §: Defined in CSS Color 4
figcaption (markup element) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0, ARIA in HTML, WAI-ARIA, WAI-ARIA
figure (markup element) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0, ARIA in HTML, WAI-ARIA, WAI-ARIA
"file" (value for FileSystemHandleKind WebIDL enumeration) §: Defined in File System
file (value for type attribute of input element ) §: Defined in HTML
"file" (value for MediaDecodingType WebIDL enumeration) §: Defined in Media Capabilities
File (WebIDL interface) §: Defined in File API; Referenced in Fetch, File System, HTML, File and Directory Entries API, Clipboard API and events, Indexed DB 3.0, XMLHttpRequest; Related terms: File.lastModified, File.name, File.webkitRelativePath, new File(fileBits, fileName, options); see also WebIDLPedia
file entry (concept) §: Defined in File System; Referenced in File System Access; Related terms: concept binary data
file host state (concept for basic URL parser ) §: Defined in URL
file locator (concept) §: Defined in File System
file name (concept) §: Defined in EPUB 3.3
file path (concept) §: Defined in EPUB 3.3
file slash state (concept for basic URL parser ) §: Defined in URL
file state (concept for basic URL parser ) §: Defined in URL
file system access result (concept) §: Defined in File System
file system entry (concept) §: Defined in File System; Referenced in File System Access; Related terms: concept parent
file system locator (concept) §: Defined in File System; Related terms: concept kind, concept path, concept root
file system path (concept) §: Defined in File System
file system root (concept) §: Defined in File System
file type guidelines (concept) §: Defined in File API
File Upload (state of markup element for input ) §: Defined in HTML
file_handlers (concept for manifest ) §: Defined in Manifest Incubations
::file-selector-button (CSS selector) §: Defined in CSS Pseudo-Elements 4; Referenced in CSS Containment 3, CSS Generated Content 3
"file-system" (value for PermissionName WebIDL enumeration) §: Defined in File System Access
new File(fileBits, fileName, options) (WebIDL constructor) §: Defined in File API
FileSystemFileEntry.file(successCallback, errorCallback) (WebIDL operation) §: Defined in File and Directory Entries API
FileCallback (WebIDL callback) §: Defined in File and Directory Entries API
FileList (WebIDL interface) §: Defined in File API; Related terms: FileList.length, FileList.item(index); see also WebIDLPedia
ErrorEvent.filename (WebIDL attribute) §: Defined in HTML
Plugin.filename (WebIDL attribute) §: Defined in HTML
FilePickerAcceptType (WebIDL dictionary) §: Defined in File System Access; Related terms: FilePickerAcceptType.accept, FilePickerAcceptType.description; see also WebIDLPedia
FilePickerOptions (WebIDL dictionary) §: Defined in File System Access; Related terms: FilePickerOptions.excludeAcceptAllOption, FilePickerOptions.id, FilePickerOptions.startIn, FilePickerOptions.types; see also WebIDLPedia
FilePropertyBag (WebIDL dictionary) §: Defined in File API; Related terms: FilePropertyBag.lastModified; see also WebIDLPedia
FileReader (WebIDL interface) §: Defined in File API; Referenced in File and Directory Entries API; Related terms: FileReader.error, FileReader.onabort, FileReader.onerror, FileReader.onload, FileReader.onloadend, FileReader.onloadstart, FileReader.onprogress, FileReader.readyState, FileReader.result, FileReader.DONE, FileReader.EMPTY, FileReader.LOADING, new FileReader(), event abort, event error, event load, event loadend, event loadstart, event progress, FileReader.abort(), FileReader.readAsArrayBuffer(blob), FileReader.readAsBinaryString(blob), FileReader.readAsDataURL(blob), FileReader.readAsText(blob, encoding); see also WebIDLPedia
new FileReader() (WebIDL constructor) §: Defined in File API
FileReaderSync (WebIDL interface) §: Defined in File API; Related terms: new FileReaderSync(), FileReaderSync.readAsArrayBuffer(blob), FileReaderSync.readAsBinaryString(blob), FileReaderSync.readAsDataURL(blob), FileReaderSync.readAsText(blob, encoding); see also WebIDLPedia
new FileReaderSync() (WebIDL constructor) §: Defined in File API
DataTransfer.files (WebIDL attribute) §: Defined in HTML; Referenced in Clipboard API and events
HTMLInputElement.files (WebIDL attribute) §: Defined in HTML; Referenced in File and Directory Entries API
LaunchParams.files (WebIDL attribute) §: Defined in Web App Launch Handler API; Referenced in Manifest Incubations
ShareData.files (WebIDL dictionary member) §: Defined in Web Share API
FileSystemEntry.filesystem (WebIDL attribute) §: Defined in File and Directory Entries API
FileSystem (WebIDL interface) §: Defined in File and Directory Entries API; Related terms: FileSystem.name, FileSystem.root; see also WebIDLPedia
FileSystemCreateWritableOptions (WebIDL dictionary) §: Defined in File System; Related terms: FileSystemCreateWritableOptions.keepExistingData; see also WebIDLPedia
FileSystemDirectoryEntry (WebIDL interface) §: Defined in File and Directory Entries API; Related terms: FileSystemDirectoryEntry.createReader(), FileSystemDirectoryEntry.getDirectory(path, options, successCallback, errorCallback), FileSystemDirectoryEntry.getFile(path, options, successCallback, errorCallback), FileSystemDirectoryEntry.readEntries(successCallback, errorCallback); see also WebIDLPedia
FileSystemDirectoryHandle (WebIDL interface) §: Defined in File System; Referenced in File System Access, Storage Buckets API; Related terms: FileSystemDirectoryHandle.getDirectoryHandle(name, options), FileSystemDirectoryHandle.getFileHandle(name, options), FileSystemDirectoryHandle.removeEntry(name, options), FileSystemDirectoryHandle.resolve(possibleDescendant); see also WebIDLPedia
FileSystemDirectoryReader (WebIDL interface) §: Defined in File and Directory Entries API; Related terms: FileSystemDirectoryReader.readEntries(successCallback, errorCallback); see also WebIDLPedia
FileSystemEntriesCallback (WebIDL callback) §: Defined in File and Directory Entries API
FileSystemEntry (WebIDL interface) §: Defined in File and Directory Entries API; Related terms: FileSystemEntry.filesystem, FileSystemEntry.fullPath, FileSystemEntry.isDirectory, FileSystemEntry.isFile, FileSystemEntry.name, FileSystemEntry.getParent(successCallback, errorCallback); see also WebIDLPedia
FileSystemEntryCallback (WebIDL callback) §: Defined in File and Directory Entries API
FileSystemFileEntry (WebIDL interface) §: Defined in File and Directory Entries API; Related terms: FileSystemFileEntry.file(successCallback, errorCallback); see also WebIDLPedia
FileSystemFileHandle (WebIDL interface) §: Defined in File System; Referenced in File System Access; Related terms: FileSystemFileHandle.createSyncAccessHandle(), FileSystemFileHandle.createWritable(options), FileSystemFileHandle.getFile(); see also WebIDLPedia
FileSystemFlags (WebIDL dictionary) §: Defined in File and Directory Entries API; Related terms: FileSystemFlags.create, FileSystemFlags.exclusive; see also WebIDLPedia
FileSystemGetDirectoryOptions (WebIDL dictionary) §: Defined in File System; Related terms: FileSystemGetDirectoryOptions.create; see also WebIDLPedia
FileSystemGetFileOptions (WebIDL dictionary) §: Defined in File System; Related terms: FileSystemGetFileOptions.create; see also WebIDLPedia
FileSystemHandle (WebIDL interface) §: Defined in File System; Referenced in File System Access, Manifest Incubations, Web App Launch Handler API; Related terms: concept is in a bucket file system, concept locator, FileSystemHandle.kind, FileSystemHandle.name, FileSystemHandle.isSameEntry(other), FileSystemHandle.queryPermission(descriptor), FileSystemHandle.requestPermission(descriptor); see also WebIDLPedia
FileSystemHandleKind (WebIDL enumeration) §: Defined in File System; Related terms: value directory, value file; see also WebIDLPedia
FileSystemHandlePermissionDescriptor (WebIDL dictionary) §: Defined in File System Access; Related terms: FileSystemHandlePermissionDescriptor.mode; see also WebIDLPedia
FileSystemPermissionDescriptor (WebIDL dictionary) §: Defined in File System Access; Related terms: FileSystemPermissionDescriptor.handle, FileSystemPermissionDescriptor.mode; see also WebIDLPedia
FileSystemPermissionMode (WebIDL enumeration) §: Defined in File System Access; Related terms: value read, value readwrite; see also WebIDLPedia
FileSystemReadWriteOptions (WebIDL dictionary) §: Defined in File System; Related terms: FileSystemReadWriteOptions.at; see also WebIDLPedia
FileSystemRemoveOptions (WebIDL dictionary) §: Defined in File System; Related terms: FileSystemRemoveOptions.recursive; see also WebIDLPedia
FileSystemSyncAccessHandle (WebIDL interface) §: Defined in File System; Related terms: FileSystemSyncAccessHandle.close(), FileSystemSyncAccessHandle.flush(), FileSystemSyncAccessHandle.getSize(), FileSystemSyncAccessHandle.read(buffer, FileSystemReadWriteOptions: options), FileSystemSyncAccessHandle.read(buffer, options), FileSystemSyncAccessHandle.truncate(newSize), FileSystemSyncAccessHandle.write(buffer, FileSystemReadWriteOptions: options), FileSystemSyncAccessHandle.write(buffer, options); see also WebIDLPedia
FileSystemWritableFileStream (WebIDL interface) §: Defined in File System; Related terms: FileSystemWritableFileStream.seek(position), FileSystemWritableFileStream.truncate(size), FileSystemWritableFileStream.write(data); see also WebIDLPedia
FileSystemWriteChunkType (WebIDL type alias) §: Defined in File System; see also WebIDLPedia
fill (concept for Headers ) §: Defined in Fetch
fill (markup attribute for animate ) §: Defined in SVG Animations 2; Referenced in SVG 2
fill (CSS value for border-image-slice ) §: Defined in CSS Backgrounds 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1
fill (CSS value for object-fit ) §: Defined in CSS Images 3 , CSS Images 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill (CSS value for mask-border-slice ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill (CSS property) §: Defined in CSS Fill and Stroke 3 , SVG 2; Referenced in CSS Linked Parameters, SVG Animations 2, CSS Color Adjustment 1, CSS Text Decoration 4, CSS Typed OM 1, Filter Effects 1, SVG Integration
fill (concept) §: Defined in SVG 2; Referenced in Compatibility
EffectTiming.fill (WebIDL dictionary member) §: Defined in Web Animations; Referenced in Web Animations 2
OptionalEffectTiming.fill (WebIDL dictionary member) §: Defined in Web Animations
fill painting area (concept) §: Defined in CSS Fill and Stroke 3
fill positioning area (concept) §: Defined in CSS Fill and Stroke 3
fill-box (CSS value for <box>, <coord-box> type, <geometry-box> type, <paint-box> type ) §: Defined in CSS Box Model 3 , CSS Box Model 4
fill-box (CSS value for clip-path ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill-box (CSS value for mask-clip ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill-box (CSS value for mask-origin ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill-box (CSS value for transform-box ) §: Defined in CSS Transforms 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fill-box (CSS value for fill-origin ) §: Defined in CSS Fill and Stroke 3
fill-box (CSS value for stroke-origin ) §: Defined in CSS Fill and Stroke 3
fill-break (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1
fill-color (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Pseudo-Elements 4, CSS Typed OM 1
fill-image (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1
fill-opacity (CSS property) §: Defined in CSS Fill and Stroke 3 , SVG 2; Referenced in CSS Typed OM 1, Filter Effects 1, SVG Strokes
fill-origin (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1; Related terms: CSS value border-box, CSS value content-box, CSS value fill-box, CSS value match-parent, CSS value padding-box, CSS value stroke-box
fill-position (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1
fill-repeat (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1
fill-rule (CSS property) §: Defined in CSS Fill and Stroke 3 , SVG 2; Referenced in CSS Shapes 2, CSS Shapes 1, CSS Typed OM 1, Filter Effects 1, SVG Strokes; Related terms: CSS value evenodd, CSS value nonzero
fill-size (CSS property) §: Defined in CSS Fill and Stroke 3; Referenced in CSS Typed OM 1
CanvasDrawPath.fill(fillRule) (WebIDL operation) §: Defined in HTML
CanvasDrawPath.fill(path, fillRule) (WebIDL operation) §: Defined in HTML
%TypedArray%.fill(value, start, end) (WebIDL operation) §: Defined in ECMAScript
Array.fill(value, start, end) (WebIDL operation) §: Defined in ECMAScript
filled (CSS value for text-emphasis-style ) §: Defined in CSS Text Decoration 3 , CSS Text Decoration 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
XRFrame.fillJointRadii(jointSpaces, radii) (WebIDL operation) §: Defined in WebXR Hand Input 1
PhotoCapabilities.fillLightMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
PhotoSettings.fillLightMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
FillLightMode (WebIDL enumeration) §: Defined in MediaStream Image Capture; Related terms: value auto, value flash, value off; see also WebIDLPedia
FillMode (WebIDL enumeration) §: Defined in Web Animations , Web Animations 2; Related terms: value auto, value backwards, value both, value forwards, value none; see also WebIDLPedia
FillPaint (value for in ) §: Defined in Filter Effects 1
XRFrame.fillPoses(spaces, baseSpace, transforms) (WebIDL operation) §: Defined in WebXR Hand Input 1
CanvasRect.fillRect(x, y, w, h) (WebIDL operation) §: Defined in HTML
CanvasFillStrokeStyles.fillStyle (WebIDL attribute) §: Defined in HTML
CanvasText.fillText(text, x, y, maxWidth) (WebIDL operation) §: Defined in HTML
[[filter]] (internal slot for GPU error scope ) §: Defined in WebGPU
filter (CSS property) §: Defined in Filter Effects 1; Referenced in Compatibility, Filter Effects 2, CSS Snapshot 2022, CSS Snapshot 2023, CSS Color 4, CSS Table 3, CSS Transforms 2
filter (markup element) §: Defined in Filter Effects 1; Referenced in Filter Effects 2
CanvasFilters.filter (WebIDL attribute) §: Defined in HTML
NodeIterator.filter (WebIDL attribute) §: Defined in DOM
TreeWalker.filter (WebIDL attribute) §: Defined in DOM
filter primitive tree (concept) §: Defined in Filter Effects 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
NodeFilter.FILTER_ACCEPT (WebIDL constant) §: Defined in DOM
NodeFilter.FILTER_REJECT (WebIDL constant) §: Defined in DOM
NodeFilter.FILTER_SKIP (WebIDL constant) §: Defined in DOM
<filter-function> (CSS type) §: Defined in Filter Effects 1
filter-primitive (markup element) §: Defined in Filter Effects 1; Related terms: markup attribute height, markup attribute in, markup attribute result, markup attribute width, markup attribute x, markup attribute y
<filter-primitive-reference> (CSS type for result ) §: Defined in Filter Effects 1
<filter-value-list> (CSS type) §: Defined in Filter Effects 1; Referenced in Filter Effects 2
filter() (CSS function) §: Defined in Filter Effects 1
%TypedArray%.filter(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.filter(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
filtered response (concept) §: Defined in Fetch; Referenced in Service Workers; Related terms: concept internal response
"filtering" (value for GPUSamplerBindingType WebIDL enumeration) §: Defined in WebGPU; Referenced in WebGPU Shading Language
MLConv2dOptions.filterLayout (WebIDL dictionary member) §: Defined in Web Neural Network API
MLConvTranspose2dOptions.filterLayout (WebIDL dictionary member) §: Defined in Web Neural Network API
filterRes (markup attribute for filter ) §: Defined in Filter Effects 1
BluetoothLEScan.filters (WebIDL attribute) §: Defined in Web Bluetooth Scanning
BluetoothLEScanOptions.filters (WebIDL dictionary member) §: Defined in Web Bluetooth Scanning
BluetoothLEScanPermissionDescriptor.filters (WebIDL dictionary member) §: Defined in Web Bluetooth Scanning
BluetoothPermissionDescriptor.filters (WebIDL dictionary member) §: Defined in Web Bluetooth
HIDDeviceRequestOptions.filters (WebIDL dictionary member) §: Defined in WebHID API
RequestDeviceOptions.filters (WebIDL dictionary member) §: Defined in Web Bluetooth
SerialPortRequestOptions.filters (WebIDL dictionary member) §: Defined in Web Serial API
USBDeviceRequestOptions.filters (WebIDL dictionary member) §: Defined in WebUSB API
USBPermissionDescriptor.filters (WebIDL dictionary member) §: Defined in WebUSB API
filterUnits (markup attribute for filter ) §: Defined in Filter Effects 1
SVGFilterElement.filterUnits (WebIDL attribute) §: Defined in Filter Effects 1; Related terms: value objectBoundingBox, value userSpaceOnUse
final connection timing info (concept for fetch timing info ) §: Defined in Fetch; Referenced in WebDriver BiDi, Resource Timing
final CSS style sheets (concept for DocumentOrShadowRoot ) §: Defined in CSSOM
final network-request start time (concept for fetch timing info ) §: Defined in Fetch; Referenced in WebDriver BiDi, Resource Timing
final network-response start time (concept for fetch timing info ) §: Defined in Fetch; Referenced in WebDriver BiDi, Resource Timing
final service worker start time (concept for fetch timing info ) §: Defined in Fetch; Referenced in Resource Timing
final steps to create an answer (algorithm) §: Defined in WebRTC 1.0; Referenced in Identity for WebRTC 1.0
final steps to create an offer (algorithm) §: Defined in WebRTC 1.0; Referenced in Identity for WebRTC 1.0
<final-bg-layer> (CSS type) §: Defined in CSS Backgrounds 3
FinalizationRegistry (WebIDL interface) §: Defined in ECMAScript; Referenced in HTML; Related terms: new FinalizationRegistry(cleanupCallback), FinalizationRegistry.register(target, heldValue, unregisterToken), FinalizationRegistry.unregister(unregisterToken); see also WebIDLPedia
%FinalizationRegistry.prototype% (WebIDL interface) §: Defined in ECMAScript; see also WebIDLPedia
new FinalizationRegistry(cleanupCallback) (WebIDL constructor) §: Defined in ECMAScript
%FinalizationRegistry% (WebIDL interface) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports; see also WebIDLPedia
finalize a pending config (concept for fenced frame config mapping ) §: Defined in Fenced Frame; Referenced in Shared Storage API, Protected Audience
finalize a reporting destination (concept) §: Defined in Fenced Frame; Referenced in Protected Audience
finalize event timing (concept) §: Defined in Event Timing API
Promise.finally(onFinally) (WebIDL operation) §: Defined in ECMAScript
find a config (concept for fenced frame config mapping ) §: Defined in Fenced Frame
find a matching complete prefetch record (concept) §: Defined in Prefetch
find a related website set (concept) §: Defined in User Agent Interaction with Related Website Sets
find a slot (concept) §: Defined in DOM
find flattened slottables (concept) §: Defined in DOM; Referenced in HTML, CSS Scoping 1
find slottables (concept) §: Defined in DOM; Referenced in CSS Scoping 1
find the intersecting or enclosed descendants (concept) §: Defined in SVG 2
find the matching font faces (concept) §: Defined in CSS Font Loading 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
find the non-container graphics elements (concept) §: Defined in SVG 2
find the typographic character for a character (concept) §: Defined in SVG 2
%TypedArray%.find(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.find(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
%TypedArray%.findIndex(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.findIndex(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
%TypedArray%.findLast(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.findLast(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
%TypedArray%.findLastIndex(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.findLastIndex(predicate, thisArg) (WebIDL operation) §: Defined in ECMAScript
CSSKeyframesRule.findRule(select) (WebIDL operation) §: Defined in CSS Animations 1
FindViaPredicate (algorithm) §: Defined in ECMAScript
fine (CSS value for pointer descriptor of @media @rule ) §: Defined in Media Queries 4 , Media Queries 5; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
RTCCertificateStats.fingerprint (WebIDL dictionary member) §: Defined in WebRTC Statistics
"fingerprint-failure" (value for RTCErrorDetailType WebIDL enumeration) §: Defined in WebRTC 1.0
RTCCertificateStats.fingerprintAlgorithm (WebIDL dictionary member) §: Defined in WebRTC Statistics
fingerprinting surface (concept) §: Defined in Mitigating Browser Fingerprinting in Web Specifications; Referenced in Web Bluetooth, MediaStream Recording
Animation.finish() (WebIDL operation) §: Defined in Web Animations; Referenced in CSS Animation Worklet API
GPUCommandEncoder.finish(descriptor) (WebIDL operation) §: Defined in WebGPU
GPURenderBundleEncoder.finish(descriptor) (WebIDL operation) §: Defined in WebGPU
finished (concept for play state ) §: Defined in Web Animations; Referenced in Scroll-driven Animations, Web Animations 2
"finished" (value for AnimationPlayState WebIDL enumeration) §: Defined in Web Animations
Animation.finished (WebIDL attribute) §: Defined in Web Animations
NavigationResult.finished (WebIDL dictionary member) §: Defined in HTML
NavigationTransition.finished (WebIDL attribute) §: Defined in HTML
ViewTransition.finished (WebIDL attribute) §: Defined in CSS View Transitions 1; Referenced in CSS View Transitions 2
FinishLoadingImportedModule (algorithm) §: Defined in ECMAScript; Referenced in HTML
finite (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Internationalization API, Uint8Array to/from base64, Intl.DurationFormat, JSON.parse source text access, ShadowRealm API, Temporal
RTCInboundRtpStreamStats.firCount (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.firCount (WebIDL dictionary member) §: Defined in WebRTC Statistics
fire an advertisementreceived event (concept) §: Defined in Web Bluetooth; Referenced in Web Bluetooth Scanning
fire an event (concept) §: Defined in DOM; Referenced in Compatibility, Fullscreen API, HTML, Notifications API, Captured Mouse Events, The Capture-Handle Actions Mechanism, Web NFC API, Web Bluetooth, WebSockets, Background Fetch, Document Picture-in-Picture, Idle Detection API, Keyboard Map, Manifest Incubations, Prerendering Revamped, Network Information API, Page Lifecycle, Portals, Save Data API, Prioritized Task Scheduling, Web Serial API, Web Preferences API, Managed Configuration API, WebHID API, Loading Signed Exchanges, WebUSB API, Window Controls Overlay, Battery Status API, Capture Handle - Bootstrapping Collaboration when Screensharing, Content Security Policy 3, CSSOM View, Device Posture API, EditContext API, File API, Gamepad, Generic Sensor API, Indexed DB 3.0, Media Source Extensions™, Media Capture and Streams, MediaStream Recording, DeviceOrientation Event, Payment Request API 1.1, Permissions, Picture-in-Picture, Pointer Events, Pointer Lock 2.0, Presentation API, Remote Playback API, Resource Timing, Screen Orientation, Screen Wake Lock API, Selection API, Service Workers, VirtualKeyboard API, Web Audio API, WebDriver, WebGPU, Web MIDI API, WebRTC Encoded Transform, WebRTC 1.0, WebXR DOM Overlays, WebXR Lighting Estimation API 1, WebXR Device API, WebXR Layers API 1, Window Management, XMLHttpRequest
Fire Functional Event (concept) §: Defined in Service Workers; Referenced in Notifications API, Background Fetch, Background Sync, Content Index, Cookie Store API, Web Periodic Background Synchronization
firebrick (concept) §: Defined in CSS Color 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
firebrick (CSS value for <color>, <named-color> type ) §: Defined in CSS Color 4
InputDeviceCapabilities.firesTouchEvents (WebIDL attribute) §: Defined in Input Device Capabilities
InputDeviceCapabilitiesInit.firesTouchEvents (WebIDL dictionary member) §: Defined in Input Device Capabilities
:first (CSS value for @page ) §: Defined in CSS Paged Media 3
:first (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
:first (CSS selector) §: Defined in CSS 2.2
"first" (value for CaptureAction WebIDL enumeration) §: Defined in The Capture-Handle Actions Mechanism
first (CSS value for string() ) §: Defined in CSS Generated Content 3
first (CSS value for baseline-source, vertical-align property ) §: Defined in CSS Inline Layout 3
first (CSS value for initial-letter-wrap ) §: Defined in CSS Inline Layout 3
first (CSS value for hanging-punctuation ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
AuthenticationExtensionsPRFValues.first (WebIDL dictionary member) §: Defined in Web Authentication
first available font (concept) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Box Alignment 3, CSS Fonts 5, CSS Inline Layout 3, CSS Text Decoration 4
first baseline (CSS value for <baseline-position>, align-content property, align-items property, align-self property, justify-items property, justify-self property ) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
first baseline set (concept) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Inline Layout 3
first child (concept for tree ) §: Defined in DOM; Referenced in HTML
First Contentful Paint (concept) §: Defined in Paint Timing
first formatted line (concept) §: Defined in CSS Pseudo-Elements 4; Referenced in CSS Display 4, CSS Flexbox 1, CSS Inline Layout 3, CSS Text 3, CSS Text 4
first interim network-response start time (concept for fetch timing info ) §: Defined in Fetch; Referenced in Resource Timing
First paint (concept) §: Defined in Paint Timing
First Public Working Draft (concept) §: Defined in W3C Process Document; Referenced in Permissions Registry, W3C Patent Policy, Permissions
first render (concept for Document ) §: Defined in MiniApp Lifecycle
first symbol value (concept) §: Defined in CSS Counter Styles 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
XPathResult.FIRST_ORDERED_NODE_TYPE (WebIDL constant) §: Defined in DOM
first-baseline alignment (concept) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Inline Layout 3
first-child (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
first-child (CSS selector) §: Defined in CSS 2.2 , Selectors 3 , Selectors 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
first-except (CSS value for string() ) §: Defined in CSS Generated Content 3
::first-letter (CSS selector) §: Defined in CSS Pseudo-Elements 4 , CSS 2.2 , Selectors 3; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Backgrounds 3, CSS Box Model 4, CSS Containment 3, CSS Generated Content 3, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Inline Layout 3, CSS Layout API 1, CSS Overflow 3, CSS Overflow 4, CSS Pseudo-Elements 4, CSS Ruby Annotation Layout 1, CSS Scroll Snap 1, CSS Text Decoration 4, CSS User Interface 4, Selectors 4; Related terms: CSS selector ::postfix, CSS selector ::prefix
first-letter (CSS value for content() ) §: Defined in CSS Generated Content 3
::first-line (CSS selector) §: Defined in CSS Pseudo-Elements 4 , CSS 2.2 , Selectors 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Backgrounds 3, CSS Box Model 4, CSS Cascading 5, CSS Containment 3, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Layout API 1, CSS Overflow 3, CSS Overflow 4, CSS Ruby Annotation Layout 1, CSS Scroll Snap 1, CSS Text Decoration 4, CSS User Interface 4, Selectors 4
:first-of-page (CSS selector) §: Defined in CSS GCPM 4
:first-of-type (CSS selector) §: Defined in Selectors 3 , Selectors 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
First-strong detection (concept) §: Defined in Internationalization Glossary
<first-valid()> (CSS type) §: Defined in CSS Values 5
first-valid() (CSS function) §: Defined in CSS Values 5
GroupEffect.firstChild (WebIDL attribute) §: Defined in Web Animations 2
Node.firstChild (WebIDL attribute) §: Defined in DOM
TreeWalker.firstChild() (WebIDL operation) §: Defined in DOM
ParentNode.firstElementChild (WebIDL attribute) §: Defined in DOM
NamedFlow.firstEmptyRegionIndex (WebIDL attribute) §: Defined in CSS Regions 1
PerformanceResourceTiming.firstInterimResponseStart (WebIDL attribute) §: Defined in Resource Timing
PerformanceLongAnimationFrameTiming.firstUIEventTimestamp (WebIDL attribute) §: Defined in Long Animation Frames API
fit-content (CSS value for block-size, height, inline-size property, max-block-size property, max-height property, max-inline-size property, max-width property, min-block-size property, min-height property, min-inline-size property, min-width property, width ) §: Defined in CSS Sizing 4; Referenced in CSS Box Alignment 3, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Sizing 3
fit-content block size (concept) §: Defined in CSS Sizing 3
fit-content inline size (concept) §: Defined in CSS Sizing 3
fit-content size (concept) §: Defined in CSS Sizing 3; Referenced in CSS Box Alignment 3, CSS Containment 2, CSS Grid Layout 1, CSS Positioned Layout 3, CSS Writing Modes 3
fit-content() (CSS function for grid-template-columns, grid-template-rows property ) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2
fit-content() (CSS function for height, max-height property, max-width property, min-height property, min-width property, width ) §: Defined in CSS Sizing 3
fit-content(<length-percentage>) (CSS value for column-width ) §: Defined in CSS Sizing 3
fitness distance (concept) §: Defined in Media Capture and Streams; Referenced in MediaStream Image Capture
fixed (CSS value for background-attachment ) §: Defined in CSS Backgrounds 3 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Paged Media 3, CSS Transforms 1
fixed (CSS value for system descriptor of @counter-style @rule ) §: Defined in CSS Counter Styles 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fixed (CSS value for position ) §: Defined in CSS Positioned Layout 3 , CSS 2.2; Referenced in CSS Positioned Layout 4, Quirks Mode, CSS Scroll Anchoring 1, CSS Exclusions 1, CSSOM View
fixed (CSS value for field-sizing ) §: Defined in CSS User Interface 4
fixed (CSS value for table-layout ) §: Defined in CSS 2.2
fixed position (concept) §: Defined in CSS Positioned Layout 3; Referenced in CSS Positioned Layout 4, CSS Overscroll Behavior 1, CSS Scroll Snap 1
fixed positioning containing block (concept) §: Defined in CSS Positioned Layout 3; Referenced in CSS Containment 2
<fixed-breadth> (CSS type) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2
fixed-layout document (concept) §: Defined in EPUB 3.3
fixed-length ArrayBuffer (concept for ECMAScript ) §: Defined in ECMAScript
fixed-length SharedArrayBuffer (concept for ECMAScript ) §: Defined in ECMAScript
<fixed-repeat> (CSS type) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2
<fixed-size> (CSS type) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2
String.fixed() (WebIDL operation) §: Defined in ECMAScript
LayoutConstraints.fixedBlockSize (WebIDL attribute) §: Defined in CSS Layout API 1
LayoutConstraintsOptions.fixedBlockSize (WebIDL dictionary member) §: Defined in CSS Layout API 1
XRProjectionLayer.fixedFoveation (WebIDL attribute) §: Defined in WebXR Layers API 1
XRWebGLLayer.fixedFoveation (WebIDL attribute) §: Defined in WebXR Device API
LayoutConstraints.fixedInlineSize (WebIDL attribute) §: Defined in CSS Layout API 1
LayoutConstraintsOptions.fixedInlineSize (WebIDL dictionary member) §: Defined in CSS Layout API 1
AudioEncoderConfig.flac (WebIDL dictionary member) §: Defined in FLAC WebCodecs Registration
FlacEncoderConfig (WebIDL dictionary) §: Defined in FLAC WebCodecs Registration; Related terms: FlacEncoderConfig.blockSize, FlacEncoderConfig.compressLevel; see also WebIDLPedia
RegExp.flags (WebIDL attribute) §: Defined in ECMAScript
"flash" (value for FillLightMode WebIDL enumeration) §: Defined in MediaStream Image Capture
flat (concept for interpolation type ) §: Defined in WebGPU Shading Language
flat tree (concept) §: Defined in CSS Scoping 1; Referenced in CSS Values 5, CSS Cascading 4, CSS Cascading 5, CSS Containment 2, CSS View Transitions 1, CSSOM, CSSOM View, Scroll-driven Animations, Selectors 4
Array.flat(depth) (WebIDL operation) §: Defined in ECMAScript
Array.flatMap(mapperFunction, thisArg) (WebIDL operation) §: Defined in ECMAScript
flatten (concept for Event ) §: Defined in DOM
flatten (WebIDL dictionary member for AssignedNodeOptions ) §: Defined in HTML
flatten more (concept for Event ) §: Defined in DOM
JsonLdProcessor.flatten() (WebIDL operation) §: Defined in JSON-LD 1.1 Processing Algorithms and API
flattened member types (concept for union ) §: Defined in Web IDL
FlattenIntoArray (algorithm) §: Defined in ECMAScript
<flex> (CSS type) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2; Referenced in CSS Borders and Box Decorations 4, CSS Values 5, CSS Typed OM 1, CSS Values 4; Related terms: CSS value fr
flex (CSS value for <display-inside>, display property ) §: Defined in CSS Display 4 , CSS Display 3; Referenced in Compatibility, URL Fragment Text Directives, CSS Snapshot 2022, CSS Snapshot 2023
flex (CSS value for attr() ) §: Defined in CSS Values 5
flex (CSS value for display ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Grid Layout 1
flex (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSS Typed OM 1; Related terms: CSS value -webkit-box, CSS value -webkit-flex, CSS value -webkit-inline-box, CSS value -webkit-inline-flex, CSS value <'flex-basis'>, CSS value <'flex-grow'>, CSS value <'flex-shrink'>, CSS value none
flex (CSS value for wrap-after, wrap-before property ) §: Defined in CSS Text 4
"flex" (value for CSSNumericBaseType WebIDL enumeration) §: Defined in CSS Typed OM 1
CSSNumericType.flex (WebIDL dictionary member) §: Defined in CSS Typed OM 1
<flex [0,∞]> (CSS value for grid-template-columns, grid-template-rows property ) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex container (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Box Model 4, CSS Grid Layout 1, CSS Grid Layout 2, CSS Layout API 1, CSS Overflow 3, CSS Positioned Layout 3, CSS Writing Modes 4
flex direction (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex formatting context (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3
flex item (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Box Model 4, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSS Grid Layout 1, CSS Grid Layout 2, CSS Overflow 3, CSS Sizing 3, CSS Text 4
flex layout (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Sizing 3
flex line (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Box Model 4, CSS Text 4
<'flex-basis'> (CSS value for flex ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-basis (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Snapshot 2022, CSS Snapshot 2023, CSS Sizing 3, CSS Typed OM 1; Related terms: CSS value auto, CSS value content
flex-direction (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Typed OM 1; Related terms: CSS value column, CSS value column-reverse, CSS value row, CSS value row-reverse
flex-end (CSS value for <content-position>, <self-position> type, align-content property, align-self property, justify-content property, justify-self property ) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, WebVTT: The Web Video Text Tracks Format
flex-end (CSS value for justify-content ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-end (CSS value for align-items, align-self property ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-end (CSS value for align-content ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-flow (CSS value for reading-order-items ) §: Defined in CSS Display 4
flex-flow (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Grid Layout 1, CSS Grid Layout 2, CSS Typed OM 1, WebVTT: The Web Video Text Tracks Format
<'flex-grow'> (CSS value for flex ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-grow (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1
flex-level (concept) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
<'flex-shrink'> (CSS value for flex ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-shrink (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1
flex-start (CSS value for <content-position>, <self-position> type, align-content property, align-self property, justify-content property, justify-self property ) §: Defined in CSS Box Alignment 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-start (CSS value for justify-content ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-start (CSS value for align-items, align-self property ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-start (CSS value for align-content ) §: Defined in CSS Flexbox 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flex-visual (CSS value for reading-order-items ) §: Defined in CSS Display 4
flex-wrap (CSS property) §: Defined in CSS Flexbox 1; Referenced in Compatibility, CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1; Related terms: CSS value nowrap, CSS value wrap, CSS value wrap-reverse
flexible length (concept) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flip-block (CSS value for position-try-options ) §: Defined in CSS Anchor Positioning
flip-inline (CSS value for position-try-options ) §: Defined in CSS Anchor Positioning
flip-start (CSS value for position-try-options ) §: Defined in CSS Anchor Positioning
DOMMatrixReadOnly.flipX() (WebIDL operation) §: Defined in Geometry Interfaces 1
"flipY" (value for ImageOrientation WebIDL enumeration) §: Defined in HTML
GPUImageCopyExternalImage.flipY (WebIDL dictionary member) §: Defined in WebGPU
DOMMatrixReadOnly.flipY() (WebIDL operation) §: Defined in Geometry Interfaces 1
float (WebIDL interface) §: Defined in Web IDL; Referenced in Filter Effects 1, Pointer Events, Touch Events, Web Audio API, WebCodecs, WebGPU, Web Neural Network API, WebXR Depth Sensing, WebXR Hand Input 1, WebXR Device API, WebXR Layers API 1, Window Management; see also WebIDLPedia
float (CSS property) §: Defined in CSS Page Floats , CSS 2.1 , CSS 2.2; Referenced in CSS Display 4, Quirks Mode, CSS Snapshot 2022, CSS Snapshot 2023, CSS Display 3, CSS Flexbox 1, CSS GCPM 3, CSS Grid Layout 1, CSS Grid Layout 2, CSS Inline Layout 3, CSS Logical Properties 1, CSS Overflow 4, CSS Positioned Layout 3, CSS Table 3, CSS Typed OM 1, CSS User Interface 4, CSS Writing Modes 3, CSS Writing Modes 4, CSS Exclusions 1, SVG 2, Web Animations; Related terms: CSS function snap-block(), CSS function snap-inline(), CSS value block-end, CSS value block-start, CSS value bottom, CSS value inline-end, CSS value inline-start, CSS value left, CSS value none, CSS value right, CSS value snap-block, CSS value snap-inline, CSS value top
"float" (value for GPUTextureSampleType WebIDL enumeration) §: Defined in WebGPU; Referenced in WebGPU Shading Language
Float (concept) §: Defined in CSS Page Floats; Referenced in CSS Inline Layout 3, CSS Layout API 1, CSS Positioned Layout 3
Float anchor (concept) §: Defined in CSS Page Floats
Float block formatting context (concept) §: Defined in CSS Page Floats
Float containing block formatting context (concept) §: Defined in CSS Page Floats
Float reference (concept) §: Defined in CSS Page Floats
float rules (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
float-defer (CSS property) §: Defined in CSS Page Floats; Referenced in CSS Typed OM 1
float-offset (CSS property) §: Defined in CSS Page Floats
float-reference (CSS property) §: Defined in CSS Page Floats; Related terms: CSS value column, CSS value inline, CSS value page, CSS value region
"float16" (value for MLOperandDataType WebIDL enumeration) §: Defined in Web Neural Network API
Float16Array (WebIDL interface) §: Defined in Web IDL; Referenced in Web Neural Network API; see also WebIDLPedia
"float16x2" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
"float16x4" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
"float32" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
"float32" (value for MLOperandDataType WebIDL enumeration) §: Defined in Web Neural Network API
"float32" (value for XRDepthDataFormat WebIDL enumeration) §: Defined in WebXR Depth Sensing
"float32-filterable" (value for GPUFeatureName WebIDL enumeration) §: Defined in WebGPU
Float32Array (WebIDL interface) §: Defined in Web IDL; Referenced in WebXR Meshing API 1, WebXR Mesh Detection, Gamepad Extensions, Geometry Interfaces 1, Orientation Sensor, Web Audio API, Web Neural Network API, WebXR Depth Sensing, WebXR Hand Input 1, WebXR Hit Test, WebXR Lighting Estimation API 1, WebXR Device API; see also WebIDLPedia
%Float32Array% (WebIDL interface) §: Defined in ECMAScript; see also WebIDLPedia
"float32x2" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
"float32x3" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
"float32x4" (value for GPUVertexFormat WebIDL enumeration) §: Defined in WebGPU
Float64Array (WebIDL interface) §: Defined in Web IDL; Referenced in Geometry Interfaces 1, Orientation Sensor; see also WebIDLPedia
%Float64Array% (WebIDL interface) §: Defined in ECMAScript; Referenced in Streams, Uint8Array to/from base64, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports; see also WebIDLPedia
"floating" (value for XRDOMOverlayType WebIDL enumeration) §: Defined in WebXR DOM Overlays
Floating times (concept) §: Defined in Internationalization Glossary
flood-color (CSS property) §: Defined in Filter Effects 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Color Adjustment 1
flood-opacity (CSS property) §: Defined in Filter Effects 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
"floor" (value for MLRoundingType WebIDL enumeration) §: Defined in Web Neural Network API
MLGraphBuilder.floor(input) (WebIDL operation) §: Defined in Web Neural Network API
Math.floor(x) (WebIDL operation) §: Defined in ECMAScript
floralwhite (concept) §: Defined in CSS Color 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
floralwhite (CSS value for <color>, <named-color> type ) §: Defined in CSS Color 4
flow (CSS value for <display-inside>, display property ) §: Defined in CSS Display 4 , CSS Display 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Writing Modes 3, CSS Writing Modes 4
flow content (concept) §: Defined in HTML; Referenced in The <model> element, Fenced Frame, EPUB 3.3, ARIA in HTML
flow layout (concept) §: Defined in CSS Display 4 , CSS Display 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Layout API 1, CSS Table 3
flow of an element (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flow-from (CSS property) §: Defined in CSS Regions 1
flow-into (CSS property) §: Defined in CSS Regions 1; Referenced in CSS GCPM 4
flow-relative (concept) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4; Referenced in CSS Borders and Box Decorations 4, Layout Instability, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Box Model 4, CSS Grid Layout 1, CSS Grid Layout 2, CSS Logical Properties 1, CSS Positioned Layout 3, CSS Sizing 3
flow-relative direction (concept) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
flow-root (CSS value for <display-inside>, display property ) §: Defined in CSS Display 4 , CSS Display 3; Referenced in URL Fragment Text Directives, CSS Snapshot 2022, CSS Snapshot 2023, CSS Writing Modes 3, CSS Writing Modes 4
SerialOptions.flowControl (WebIDL dictionary member) §: Defined in Web Serial API
FlowControlType (WebIDL enumeration) §: Defined in Web Serial API; Related terms: value hardware, value none; see also WebIDLPedia
Transformer.flush (WebIDL dictionary member) §: Defined in Streams
AudioDecoder.flush() (WebIDL operation) §: Defined in WebCodecs
AudioEncoder.flush() (WebIDL operation) §: Defined in WebCodecs
FileSystemSyncAccessHandle.flush() (WebIDL operation) §: Defined in File System
VideoDecoder.flush() (WebIDL operation) §: Defined in WebCodecs
VideoEncoder.flush() (WebIDL operation) §: Defined in WebCodecs
flushAlgorithm (concept for set up of TransformStream interface ) §: Defined in Streams; Referenced in Encoding, Fetch, Compression Streams
fmt (algorithm for supplementalPubKeys record ) §: Defined in Web Authentication
:focus (CSS selector) §: Defined in CSS 2.2 , Selectors 3 , Selectors 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS User Interface 4
focus (event for HTMLElement, Window interface ) §: Defined in HTML
focus (CSS value for spatial-navigation-action ) §: Defined in CSS Spatial Navigation 1
focus (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Focus and origin check (concept) §: Defined in Generic Sensor API
"focus-captured-surface" (value for CaptureStartFocusBehavior WebIDL enumeration) §: Defined in Screen Capture
"focus-capturing-application" (value for CaptureStartFocusBehavior WebIDL enumeration) §: Defined in Screen Capture
:focus-visible (CSS selector) §: Defined in Selectors 4; Referenced in CSS User Interface 4
:focus-within (CSS selector) §: Defined in Selectors 4
Window.focus() (WebIDL operation) §: Defined in HTML; Referenced in Notifications API, Document Picture-in-Picture, CSS Containment 2, CSS Overflow 3
WindowClient.focus() (WebIDL operation) §: Defined in Service Workers
HTMLOrSVGElement.focus(options) (WebIDL operation) §: Defined in HTML; Referenced in Fenced Frame, CSS Spatial Navigation 1
focusable (concept) §: Defined in SVG 2; Referenced in SVG Accessibility API Mappings
Element.focusableAreas(option) (WebIDL operation) §: Defined in CSS Spatial Navigation 1
FocusableAreaSearchMode (WebIDL enumeration) §: Defined in CSS Spatial Navigation 1; Related terms: value all, value visible; see also WebIDLPedia
FocusableAreasOption (WebIDL dictionary) §: Defined in CSS Spatial Navigation 1; Related terms: FocusableAreasOption.mode; see also WebIDLPedia
MediaTrackCapabilities.focusDistance (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackConstraintSet.focusDistance (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSettings.focusDistance (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSupportedConstraints.focusDistance (WebIDL dictionary member) §: Defined in MediaStream Image Capture
WindowClient.focused (WebIDL attribute) §: Defined in Service Workers
FocusEvent (WebIDL interface) §: Defined in UI Events; Referenced in DOM, HTML; Related terms: FocusEvent.relatedTarget, new FocusEvent(type, eventInitDict); see also WebIDLPedia
new FocusEvent(type, eventInitDict) (WebIDL constructor) §: Defined in UI Events
FocusEventInit (WebIDL dictionary) §: Defined in UI Events; Related terms: FocusEventInit.relatedTarget; see also WebIDLPedia
focusing steps (concept) §: Defined in HTML; Referenced in WebDriver BiDi, Document Picture-in-Picture, Fenced Frame, CSS Spatial Navigation 1, Service Workers, WebDriver
MediaTrackCapabilities.focusMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackConstraintSet.focusMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSettings.focusMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSupportedConstraints.focusMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
Selection.focusNode (WebIDL attribute) §: Defined in Selection API
Selection.focusOffset (WebIDL attribute) §: Defined in Selection API
FocusOptions (WebIDL dictionary) §: Defined in HTML; Related terms: FocusOptions.focusVisible, FocusOptions.preventScroll; see also WebIDLPedia
NavigationInterceptOptions.focusReset (WebIDL dictionary member) §: Defined in HTML
FocusOptions.focusVisible (WebIDL dictionary member) §: Defined in HTML
"folded" (value for DevicePostureType WebIDL enumeration) §: Defined in Device Posture API
"follow" (value for RequestRedirect WebIDL enumeration) §: Defined in Fetch
following (concept for tree ) §: Defined in DOM; Referenced in URL Fragment Text Directives, CSSOM
following element (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Font (WebIDL interface) §: Defined in Font Metrics API 1; Related terms: Font.glyphsRendered, Font.name; see also WebIDLPedia
"font" (value for RequestDestination WebIDL enumeration) §: Defined in Fetch
font (markup element) §: Defined in HTML; Referenced in CSS Fonts 4
font (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Syntax 3, CSS Typed OM 1, CSS Values 3, CSS Values 4, Filter Effects 1, WebVTT: The Web Video Text Tracks Format; Related terms: CSS value caption, CSS value icon, CSS value menu, CSS value message-box, CSS value small-caption, CSS value status-bar
CanvasTextDrawingStyles.font (WebIDL attribute) §: Defined in HTML
font block period (concept) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, Paint Timing
font document (concept) §: Defined in SVG Integration
font download timer (concept) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
font failure period (concept) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
font MIME type (concept) §: Defined in MIME Sniffing; Referenced in HTML
font swap period (concept) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
CSSRule.FONT_FACE_RULE (WebIDL constant) §: Defined in CSSOM
CSSRule.FONT_FEATURE_VALUES_RULE (WebIDL constant) §: Defined in CSS Fonts 4
font-display (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4; Related terms: CSS value auto, CSS value block, CSS value fallback, CSS value optional, CSS value swap
font-display (CSS descriptor for @font-feature-values ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-display (WebIDL attribute) §: Defined in CSS Fonts 4
@font-face (CSS @rule) §: Defined in CSS Fonts 4 , CSS Fonts 5; Referenced in Local Font Access, CSS Snapshot 2023, CSS Cascading 5, CSS Cascading 6, CSS Containment 3, CSS Scoping 1, CSS Syntax 3, CSS Transitions 2, CSS Values 4; Related terms: CSS descriptor ascent-override, CSS descriptor descent-override, CSS descriptor font-display, CSS descriptor font-family, CSS descriptor font-feature-settings, CSS descriptor font-language-override, CSS descriptor font-named-instance, CSS descriptor font-size, CSS descriptor font-style, CSS descriptor font-variation-settings, CSS descriptor font-weight, CSS descriptor font-width, CSS descriptor line-gap-override, CSS descriptor size-adjust, CSS descriptor src, CSS descriptor subscript-position-override, CSS descriptor subscript-size-override, CSS descriptor superscript-position-override, CSS descriptor superscript-size-override, CSS descriptor unicode-range
font-family (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Values 5, Local Font Access, CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Fonts 5, CSS Scoping 1, CSS Speech 1, CSS Typed OM 1, CSS Values 3, CSS Values 4; Related terms: CSS value cursive, CSS value fantasy, CSS value generic(fangsong), CSS value generic(kai), CSS value generic(nastaliq), CSS value math, CSS value monospace, CSS value sans-serif, CSS value serif, CSS value system-ui, CSS value ui-monospace, CSS value ui-rounded, CSS value ui-sans-serif, CSS value ui-serif, CSS value xxx
font-family (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4; Referenced in CSS Scoping 1
font-family (CSS descriptor for @font-palette-values ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-family (WebIDL attribute) §: Defined in CSS Fonts 4
font-feature-settings (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
font-feature-settings (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Text 3, CSS Text 4, CSS Writing Modes 3, CSS Writing Modes 4, CSSOM; Related terms: CSS value <feature-tag-value>, CSS value normal
CSSFontFaceDescriptors.font-feature-settings (WebIDL attribute) §: Defined in CSS Fonts 4
font-feature-value-type (concept for @font-feature-values ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
@font-feature-values (CSS @rule) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Scoping 1; Related terms: concept font-feature-value-type, CSS @rule @annotation, CSS @rule @character-variant, CSS @rule @historical-forms, CSS @rule @ornaments, CSS @rule @styleset, CSS @rule @stylistic, CSS @rule @swash, CSS descriptor font-display
<font-features-tech> (CSS type) §: Defined in CSS Fonts 4 , CSS Fonts 5
<font-format> (CSS type) §: Defined in CSS Fonts 4 , CSS Fonts 5; Referenced in CSS Conditional 5
font-kerning (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value auto, CSS value none, CSS value normal
font-language-override (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
font-language-override (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Fonts 5, CSS Inline Layout 3, CSS Typed OM 1
CSSFontFaceDescriptors.font-language-override (WebIDL attribute) §: Defined in CSS Fonts 4
font-named-instance (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-named-instance (WebIDL attribute) §: Defined in CSS Fonts 4
font-optical-sizing (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Fonts 5, CSS Typed OM 1; Related terms: CSS value auto, CSS value none
font-palette (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Values 5, CSS Snapshot 2023, CSS Scoping 1, CSS Typed OM 1; Related terms: CSS type <palette-identifier>, CSS type <palette-mix()>, CSS value dark, CSS value light, CSS value normal
@font-palette-values (CSS @rule) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Scoping 1; Related terms: CSS descriptor base-palette, CSS descriptor font-family, CSS descriptor override-colors
font-relative lengths (concept) §: Defined in CSS Values 3 , CSS Values 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Fonts 4, CSS Fonts 5, CSS Writing Modes 3, CSS Writing Modes 4
font-size (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Size Adjustment 1, CSS Variables 2, CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Containment 3, CSS Fonts 5, CSS Inline Layout 3, CSS Paged Media 3, CSS Properties and Values API 1, CSS Text 4, CSS Text Decoration 4, CSS Typed OM 1, CSS Values 3, CSS Values 4, CSS Variables 1, CSSOM, Filter Effects 1, Media Queries 4, Media Queries 5, Web Animations; Related terms: CSS value large, CSS value math, CSS value medium, CSS value small, CSS value x-large, CSS value x-small, CSS value xx-large, CSS value xx-small
font-size (CSS descriptor for @font-face ) §: Defined in CSS Fonts 5; Referenced in CSS Variables 2, CSS Ruby Annotation Layout 1, CSS Values 4; Related terms: CSS value auto
font-size-adjust (CSS property) §: Defined in CSS Fonts 4 , CSS Fonts 5; Referenced in CSS Snapshot 2023, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSS Typed OM 1, Filter Effects 1; Related terms: CSS value cap-height, CSS value ch-width, CSS value ex-height, CSS value ex-height | cap-height | ch-width | ic-width | ic-height, CSS value from-font, CSS value ic-height, CSS value ic-width, CSS value none
<font-src> (CSS type) §: Defined in CSS Fonts 4
font-src (concept) §: Defined in Content Security Policy 3
<font-src-list> (CSS type) §: Defined in CSS Fonts 4
font-stretch (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Typed OM 1, CSSOM
CSSFontFaceDescriptors.font-stretch (WebIDL attribute) §: Defined in CSS Fonts 4
font-style (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Fonts 5, CSS Typed OM 1, CSSOM; Related terms: CSS value italic, CSS value normal, CSS value oblique, CSS value oblique <angle [-90deg,90deg]>?, CSS value small-caps
font-style (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-style (WebIDL attribute) §: Defined in CSS Fonts 4
font-synthesis (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Typed OM 1
font-synthesis-position (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value auto, CSS value none
font-synthesis-small-caps (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value auto, CSS value none
font-synthesis-style (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value auto, CSS value none
font-synthesis-weight (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value auto, CSS value none
<font-tech> (CSS type) §: Defined in CSS Fonts 4 , CSS Fonts 5; Referenced in CSS Conditional 5
font-variant (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Typed OM 1, CSS Writing Modes 3, CSS Writing Modes 4, CSSOM; Related terms: CSS value none, CSS value normal
font-variant-alternates (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Typed OM 1; Related terms: CSS value annotation(<feature-value-name>), CSS value character-variant(<feature-value-name>#), CSS value historical-forms, CSS value normal, CSS value ornaments(<feature-value-name>), CSS value styleset(<feature-value-name>#), CSS value stylistic(<feature-value-name>), CSS value swash(<feature-value-name>)
font-variant-caps (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value all-petite-caps, CSS value all-small-caps, CSS value normal, CSS value petite-caps, CSS value small-caps, CSS value titling-caps, CSS value unicase
<font-variant-css2> (CSS type) §: Defined in CSS Fonts 4
font-variant-east-asian (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value full-width, CSS value jis04, CSS value jis78, CSS value jis83, CSS value jis90, CSS value normal, CSS value proportional-width, CSS value ruby, CSS value simplified, CSS value traditional
font-variant-emoji (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Typed OM 1; Related terms: CSS value emoji, CSS value normal, CSS value text, CSS value unicode
font-variant-ligatures (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value common-ligatures, CSS value contextual, CSS value discretionary-ligatures, CSS value historical-ligatures, CSS value no-common-ligatures, CSS value no-contextual, CSS value no-discretionary-ligatures, CSS value no-historical-ligatures, CSS value none, CSS value normal
font-variant-numeric (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value diagonal-fractions, CSS value lining-nums, CSS value normal, CSS value oldstyle-nums, CSS value ordinal, CSS value proportional-nums, CSS value slashed-zero, CSS value stacked-fractions, CSS value tabular-nums
font-variant-position (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Fonts 5, CSS Text Decoration 3, CSS Text Decoration 4; Related terms: CSS value normal, CSS value sub, CSS value super
font-variation-settings (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
font-variation-settings (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023, CSS Typed OM 1
CSSFontFaceDescriptors.font-variation-settings (WebIDL attribute) §: Defined in CSS Fonts 4
font-weight (CSS property) §: Defined in CSS Fonts 4 , CSS 2.1 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 4, CSS Cascading 5, CSS Fonts 5, CSS Typed OM 1, CSSOM, Web Animations; Related terms: CSS value bold, CSS value bolder, CSS value lighter, CSS value normal
font-weight (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-weight (WebIDL attribute) §: Defined in CSS Fonts 4
<font-weight-absolute> (CSS type) §: Defined in CSS Fonts 4
font-width (CSS property) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023; Related terms: CSS value condensed, CSS value expanded, CSS value extra-condensed, CSS value extra-expanded, CSS value normal, CSS value semi-condensed, CSS value semi-expanded, CSS value ultra-condensed, CSS value ultra-expanded
font-width (CSS descriptor for @font-face ) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.font-width (WebIDL attribute) §: Defined in CSS Fonts 4
<font-width-css3> (CSS type) §: Defined in CSS Fonts 4
FontMetrics.fontBoundingBoxAscent (WebIDL attribute) §: Defined in Font Metrics API 1
TextMetrics.fontBoundingBoxAscent (WebIDL attribute) §: Defined in HTML
FontMetrics.fontBoundingBoxDescent (WebIDL attribute) §: Defined in Font Metrics API 1
TextMetrics.fontBoundingBoxDescent (WebIDL attribute) §: Defined in HTML
String.fontcolor(color) (WebIDL operation) §: Defined in ECMAScript
FontData (WebIDL interface) §: Defined in Local Font Access; Related terms: FontData.family, FontData.fullName, FontData.postscriptName, FontData.style, FontData.blob(); see also WebIDLPedia
CSSFontFaceDescriptors.fontDisplay (WebIDL attribute) §: Defined in CSS Fonts 4
FontFace (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFace.ascentOverride, FontFace.[[Data]], FontFace.descentOverride, FontFace.display, FontFace.family, FontFace.features, FontFace.featureSettings, FontFace.[[FontStatusPromise]], FontFace.lineGapOverride, FontFace.loaded, FontFace.palettes, FontFace.status, FontFace.stretch, FontFace.style, FontFace.unicodeRange, FontFace.[[Urls]], FontFace.variations, FontFace.variationSettings, FontFace.weight, new FontFace(family, source, descriptors), FontFace.load(); see also WebIDLPedia
new FontFace(family, source, descriptors) (WebIDL constructor) §: Defined in CSS Font Loading 3
FontFaceDescriptors (WebIDL dictionary) §: Defined in CSS Font Loading 3; Related terms: FontFaceDescriptors.ascentOverride, FontFaceDescriptors.descentOverride, FontFaceDescriptors.display, FontFaceDescriptors.featureSettings, FontFaceDescriptors.lineGapOverride, FontFaceDescriptors.stretch, FontFaceDescriptors.style, FontFaceDescriptors.unicodeRange, FontFaceDescriptors.variationSettings, FontFaceDescriptors.weight; see also WebIDLPedia
FontFaceFeatures (WebIDL interface) §: Defined in CSS Font Loading 3; see also WebIDLPedia
FontFaceLoadStatus (WebIDL enumeration) §: Defined in CSS Font Loading 3; Related terms: value error, value loaded, value loading, value unloaded; see also WebIDLPedia
FontFacePalette (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFacePalette.length, FontFacePalette.usableWithDarkBackground, FontFacePalette.usableWithLightBackground; see also WebIDLPedia
FontFacePalettes (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFacePalettes.length; see also WebIDLPedia
FontFaceSetLoadEvent.fontfaces (WebIDL attribute) §: Defined in CSS Font Loading 3
FontFaceSetLoadEventInit.fontfaces (WebIDL dictionary member) §: Defined in CSS Font Loading 3
FontFaceSet (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: concept iteration order, concept pending on the environment, concept stuck on the environment, FontFaceSet.[[FailedFonts]], FontFaceSet.[[LoadedFonts]], FontFaceSet.[[LoadingFonts]], FontFaceSet.onloading, FontFaceSet.onloadingdone, FontFaceSet.onloadingerror, FontFaceSet.ready, FontFaceSet.[[ReadyPromise]], FontFaceSet.status, new FontFaceSet(initialFaces), event loading, event loadingdone, event loadingerror, FontFaceSet.add(font), FontFaceSet.check(font, text), FontFaceSet.clear(), FontFaceSet.delete(font), FontFaceSet.load(font, text); see also WebIDLPedia
new FontFaceSet(initialFaces) (WebIDL constructor) §: Defined in CSS Font Loading 3
FontFaceSetLoadEvent (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFaceSetLoadEvent.fontfaces, new FontFaceSetLoadEvent(type, eventInitDict); see also WebIDLPedia
new FontFaceSetLoadEvent(type, eventInitDict) (WebIDL constructor) §: Defined in CSS Font Loading 3
FontFaceSetLoadEventInit (WebIDL dictionary) §: Defined in CSS Font Loading 3; Related terms: FontFaceSetLoadEventInit.fontfaces; see also WebIDLPedia
FontFaceSetLoadStatus (WebIDL enumeration) §: Defined in CSS Font Loading 3; Related terms: value loaded, value loading; see also WebIDLPedia
FontFaceSource (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFaceSource.fonts; see also WebIDLPedia
FontFaceVariationAxis (WebIDL interface) §: Defined in CSS Font Loading 3; Related terms: FontFaceVariationAxis.axisTag, FontFaceVariationAxis.defaultValue, FontFaceVariationAxis.maximumValue, FontFaceVariationAxis.minimumValue, FontFaceVariationAxis.name; see also WebIDLPedia
FontFaceVariations (WebIDL interface) §: Defined in CSS Font Loading 3; see also WebIDLPedia
CSSFontFaceDescriptors.fontFamily (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontFeatureValuesRule.fontFamily (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontPaletteValuesRule.fontFamily (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.fontFeatureSettings (WebIDL attribute) §: Defined in CSS Fonts 4
CanvasTextDrawingStyles.fontKerning (WebIDL attribute) §: Defined in HTML
CSSFontFaceDescriptors.fontLanguageOverride (WebIDL attribute) §: Defined in CSS Fonts 4
FontMetrics (WebIDL interface) §: Defined in Font Metrics API 1; Related terms: FontMetrics.advances, FontMetrics.baselines, FontMetrics.boundingBoxAscent, FontMetrics.boundingBoxDescent, FontMetrics.boundingBoxLeft, FontMetrics.boundingBoxRight, FontMetrics.dominantBaseline, FontMetrics.emHeightAscent, FontMetrics.emHeightDescent, FontMetrics.fontBoundingBoxAscent, FontMetrics.fontBoundingBoxDescent, FontMetrics.fonts, FontMetrics.height, FontMetrics.width; see also WebIDLPedia
CSSFontFaceDescriptors.fontNamedInstance (WebIDL attribute) §: Defined in CSS Fonts 4
FontFaceSource.fonts (WebIDL attribute) §: Defined in CSS Font Loading 3
FontMetrics.fonts (WebIDL attribute) §: Defined in Font Metrics API 1
String.fontsize(size) (WebIDL operation) §: Defined in ECMAScript
FontFace.[[FontStatusPromise]] (internal slot) §: Defined in CSS Font Loading 3
CanvasTextDrawingStyles.fontStretch (WebIDL attribute) §: Defined in HTML
CSSFontFaceDescriptors.fontStretch (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.fontStyle (WebIDL attribute) §: Defined in CSS Fonts 4
CanvasTextDrawingStyles.fontVariantCaps (WebIDL attribute) §: Defined in HTML
CSSFontFaceDescriptors.fontVariationSettings (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.fontWeight (WebIDL attribute) §: Defined in CSS Fonts 4
CSSFontFaceDescriptors.fontWidth (WebIDL attribute) §: Defined in CSS Fonts 4
VideoPlaybackQuality.foo (WebIDL attribute) §: Defined in Media Playback Quality
footer (markup element) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0, ARIA in HTML, WAI-ARIA, WAI-ARIA
footnote (CSS value for float ) §: Defined in CSS GCPM 3
footnote-display (CSS property) §: Defined in CSS GCPM 3; Related terms: CSS value block, CSS value compact, CSS value inline
footnote-policy (CSS property) §: Defined in CSS GCPM 3; Related terms: CSS value auto, CSS value block, CSS value line
for (markup attribute for label ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
for (markup attribute for output ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
for (markup attribute for script ) §: Defined in HTML
Symbol.for(key) (WebIDL operation) §: Defined in ECMAScript
forbidden domain code point (concept) §: Defined in URL
forbidden host code point (concept) §: Defined in URL
forbidden method (concept) §: Defined in Fetch; Referenced in XMLHttpRequest
forbidden request-header (concept) §: Defined in Fetch; Referenced in Federated Credential Management API, Client Hints Infrastructure, Private Network Access, XMLHttpRequest
forbidden response-header name (concept) §: Defined in Fetch; Referenced in Fetch Metadata
ForBodyEvaluation (algorithm) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management
Touch.force (WebIDL attribute) §: Defined in Touch Events
TouchInit.force (WebIDL dictionary member) §: Defined in Touch Events
"force-cache" (value for RequestCache WebIDL enumeration) §: Defined in Fetch
force-end (CSS value for hanging-punctuation ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
forced break (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Grid Layout 3, CSS Snapshot 2022, CSS Snapshot 2023, CSS Containment 2, CSS Inline Layout 3, CSS Overflow 4, CSS Paged Media 3
Forced colors mode (concept) §: Defined in CSS Color Adjustment 1; Referenced in CSS Color 4, CSS Pseudo-Elements 4, Media Queries 5
forced line break (concept) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Inline Layout 3, CSS Inline Layout 3, CSS Lists 3
forced paragraph break (concept) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
forced-color-adjust (CSS property) §: Defined in CSS Color Adjustment 1; Referenced in CSS Pseudo-Elements 4; Related terms: CSS value auto, CSS value none, CSS value preserve-parent-color
forced-colors (CSS descriptor for @media ) §: Defined in Media Queries 5; Referenced in CSS Color 4, CSS Color Adjustment 1; Related terms: CSS value active, CSS value none
PerformanceScriptTiming.forcedStyleAndLayoutDuration (WebIDL attribute) §: Defined in Long Animation Frames API
GPURequestAdapterOptions.forceFallbackAdapter (WebIDL dictionary member) §: Defined in WebGPU
XRCompositionLayer.forceMonoPresentation (WebIDL attribute) §: Defined in WebXR Layers API 1
SVGSVGElement.forceRedraw() (WebIDL operation) §: Defined in SVG 2
AV1EncoderConfig.forceScreenContentTools (WebIDL dictionary member) §: Defined in AV1 WebCodecs Registration
ForDebuggingOnly (WebIDL interface) §: Defined in Protected Audience; Related terms: ForDebuggingOnly.reportAdAuctionLoss(url), ForDebuggingOnly.reportAdAuctionWin(url); see also WebIDLPedia
InterestGroupBiddingAndScoringScriptRunnerGlobalScope.forDebuggingOnly (WebIDL attribute) §: Defined in Protected Audience
BiddingBrowserSignals.forDebuggingOnlyInCooldownOrLockout (WebIDL dictionary member) §: Defined in Protected Audience
ScoringBrowserSignals.forDebuggingOnlyInCooldownOrLockout (WebIDL dictionary member) §: Defined in Protected Audience
%TypedArray%.forEach(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.forEach(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript; Referenced in Web IDL
Map.forEach(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
forEach(callbackfn, thisArg) (WebIDL operation for Set ) §: Defined in ECMAScript
foreign content document (concept) §: Defined in EPUB 3.3
foreign resource (concept) §: Defined in EPUB 3.3
foreignObject (markup element) §: Defined in SVG 2; Referenced in CSS Transforms 2
forestgreen (concept) §: Defined in CSS Color 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
forestgreen (CSS value for <color>, <named-color> type ) §: Defined in CSS Color 4
BluetoothDevice.forget() (WebIDL operation) §: Defined in Web Bluetooth
HIDDevice.forget() (WebIDL operation) §: Defined in WebHID API
SerialPort.forget() (WebIDL operation) §: Defined in Web Serial API
USBDevice.forget() (WebIDL operation) §: Defined in WebUSB API
forgiving-base64 decode (concept) §: Defined in Infra; Referenced in Fetch, HTML, WebDriver BiDi, Attribution Reporting, Protected Audience
forgiving-base64 encode (concept) §: Defined in Infra; Referenced in HTML, WebDriver BiDi, WebSockets, Attribution Reporting
<forgiving-selector-list> (CSS type) §: Defined in Selectors 4; Referenced in CSS Cascading 6, CSS Nesting
%ForInIteratorPrototype% (WebIDL interface) §: Defined in ECMAScript; see also WebIDLPedia
form (markup element) §: Defined in HTML; Referenced in Fetch, Credential Management 1, EPUB 3.3, EPUB Reading Systems 3.3, HTML Accessibility API Mappings 1.0, ARIA in HTML, MathML Core, Mixed Content, WAI-ARIA, WAI-ARIA; Related terms: markup attribute accept, markup attribute accept-charset, markup attribute action, markup attribute autocomplete, markup attribute enctype, markup attribute formaction, markup attribute formenctype, markup attribute formmethod, markup attribute formnovalidate, markup attribute formtarget, markup attribute method, markup attribute name, markup attribute novalidate, markup attribute rel, markup attribute target
form (markup attribute for button, fieldset element, input element, object element, output element, select element, textarea element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
form (markup attribute for mo ) §: Defined in MathML Core
ElementInternals.form (WebIDL attribute) §: Defined in HTML
HTMLButtonElement.form (WebIDL attribute) §
HTMLFieldSetElement.form (WebIDL attribute) §
HTMLInputElement.form (WebIDL attribute) §
HTMLObjectElement.form (WebIDL attribute) §
HTMLOutputElement.form (WebIDL attribute) §
HTMLSelectElement.form (WebIDL attribute) §
HTMLTextAreaElement.form (WebIDL attribute) §: Defined in HTML
HTMLLabelElement.form (WebIDL attribute) §: Defined in HTML
HTMLLegendElement.form (WebIDL attribute) §: Defined in HTML
HTMLOptionElement.form (WebIDL attribute) §: Defined in HTML
form owner (concept for button, fieldset element, form-associated custom element , img element, input element, object element, output element, select element, textarea element ) §: Defined in HTML; Referenced in Credential Management 1, XMLHttpRequest
form_factor (concept) §: Defined in Web App Manifest - Application Information
form-action (concept) §: Defined in Content Security Policy 3; Referenced in Credential Management 1
form-associated custom element (concept) §: Defined in HTML; Referenced in Fenced Frame, HTML Accessibility API Mappings 1.0, ARIA in HTML; Related terms: concept form owner
form-factors (concept for user agent ) §: Defined in User-Agent Client Hints
formaction (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
HTMLButtonElement.formAction (WebIDL attribute) §
HTMLInputElement.formAction (WebIDL attribute) §: Defined in HTML
formally addressed (concept) §: Defined in W3C Process Document
AudioData.[[format]] (internal slot) §
AudioData.[[format]] (internal slot) §: Defined in WebCodecs , WebCodecs
VideoFrame.[[format]] (internal slot) §
VideoFrame.[[format]] (internal slot) §: Defined in WebCodecs , WebCodecs
AacEncoderConfig.format (WebIDL dictionary member) §: Defined in AAC WebCodecs Registration
AudioDataCopyToOptions.format (WebIDL dictionary member) §: Defined in WebCodecs
AudioDataInit.format (WebIDL dictionary member) §: Defined in WebCodecs
AvcEncoderConfig.format (WebIDL dictionary member) §: Defined in H.264
DetectedBarcode.format (WebIDL dictionary member) §: Defined in Accelerated Shape Detection in Images
GPUCanvasConfiguration.format (WebIDL dictionary member) §: Defined in WebGPU
GPUColorTargetState.format (WebIDL dictionary member) §: Defined in WebGPU
GPUDepthStencilState.format (WebIDL dictionary member) §: Defined in WebGPU
GPUStorageTextureBindingLayout.format (WebIDL dictionary member) §: Defined in WebGPU
GPUTexture.format (WebIDL attribute) §: Defined in WebGPU; Referenced in WebGPU Shading Language
GPUTextureDescriptor.format (WebIDL dictionary member) §: Defined in WebGPU
GPUTextureViewDescriptor.format (WebIDL dictionary member) §: Defined in WebGPU
GPUVertexAttribute.format (WebIDL dictionary member) §: Defined in WebGPU
HevcEncoderConfig.format (WebIDL dictionary member) §: Defined in H.265
OpusEncoderConfig.format (WebIDL dictionary member) §: Defined in Opus WebCodecs Registration
VideoFrameBufferInit.format (WebIDL dictionary member) §: Defined in WebCodecs
VideoFrameCopyToOptions.format (WebIDL dictionary member) §: Defined in WebCodecs
BarcodeDetectorOptions.formats (WebIDL dictionary member) §: Defined in Accelerated Shape Detection in Images
Formatter (algorithm) §: Defined in Console; Referenced in WebDriver BiDi
formatting context (concept) §: Defined in CSS Display 4 , CSS Display 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Fragmentation 3, CSS Fragmentation 4, CSS Containment 3, CSS Flexbox 1, CSS Inline Layout 3, CSS Multicol 1, CSS Positioned Layout 3, CSS Ruby Annotation Layout 1, CSS Sizing 3, CSS Sizing 4
formatting context (concept) §: Defined in CSS 2.1
formatting structure (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
FormDataEvent.formData (WebIDL attribute) §: Defined in HTML
NavigateEvent.formData (WebIDL attribute) §: Defined in HTML
NavigateEventInit.formData (WebIDL dictionary member) §: Defined in HTML
formdata (event for HTMLElement ) §: Defined in HTML
FormData (WebIDL interface) §: Defined in XMLHttpRequest; Referenced in Fetch, HTML; Related terms: concept entry list, new FormData(form, submitter), FormData.append(name, blobValue, filename), FormData.append(name, value), FormData.delete(name), FormData.get(name), FormData.getAll(name), FormData.has(name), FormData.set(name, blobValue, filename), FormData.set(name, value); see also WebIDLPedia
Body.formData() (WebIDL operation) §: Defined in Fetch
new FormData(form, submitter) (WebIDL constructor) §: Defined in XMLHttpRequest
FormDataEntryValue (WebIDL type alias) §: Defined in XMLHttpRequest; see also WebIDLPedia
FormDataEvent (WebIDL interface) §: Defined in HTML; Related terms: FormDataEvent.formData; see also WebIDLPedia
FormDataEventInit (WebIDL dictionary) §: Defined in HTML; see also WebIDLPedia
formenctype (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
HTMLButtonElement.formEnctype (WebIDL attribute) §
HTMLInputElement.formEnctype (WebIDL attribute) §: Defined in HTML
UADataValues.formFactors (WebIDL dictionary member) §: Defined in User-Agent Client Hints
formmethod (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0; Related terms: value dialog, value dialog, value get, value get, value post, value post
HTMLButtonElement.formMethod (WebIDL attribute) §
HTMLInputElement.formMethod (WebIDL attribute) §: Defined in HTML
formnovalidate (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
HTMLButtonElement.formNoValidate (WebIDL attribute) §
HTMLInputElement.formNoValidate (WebIDL attribute) §: Defined in HTML
Document.forms (WebIDL attribute) §: Defined in HTML
formtarget (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0
HTMLButtonElement.formTarget (WebIDL attribute) §
HTMLInputElement.formTarget (WebIDL attribute) §: Defined in HTML
"forward" (value for MLRecurrentNetworkDirection WebIDL enumeration) §: Defined in Web Neural Network API
forward-compatible parsing (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
History.forward() (WebIDL operation) §: Defined in HTML
Navigation.forward(options) (WebIDL operation) §: Defined in HTML
forwarded part name list (concept for element ) §: Defined in CSS Shadow Parts
forwards (CSS value for animation-fill-mode ) §: Defined in CSS Animations 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Animations 2
"forwards" (value for FillMode, PlaybackDirection enumeration WebIDL enumerations) §: Defined in Web Animations , Web Animations 2
AudioListener.forwardX (WebIDL attribute) §: Defined in Web Audio API
AudioListener.forwardY (WebIDL attribute) §: Defined in Web Audio API
AudioListener.forwardZ (WebIDL attribute) §: Defined in Web Audio API
RTCIceCandidate.foundation (WebIDL attribute) §: Defined in WebRTC 1.0
RTCIceCandidateStats.foundation (WebIDL dictionary member) §: Defined in WebRTC Statistics
fr (CSS value for <flex> ) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2; Referenced in CSS Borders and Box Decorations 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Values 3, CSS Values 4
fr (markup attribute for radialGradient ) §: Defined in SVG 2
SVGRadialGradientElement.fr (WebIDL attribute) §: Defined in SVG 2
fr(value) (WebIDL operation for CSS ) §: Defined in CSS Typed OM 1
RTCRemoteInboundRtpStreamStats.fractionLost (WebIDL dictionary member) §: Defined in WebRTC Statistics
fragment (concept for url ) §: Defined in URL; Referenced in CSS Linked Parameters, Fetch, HTML, URL Pattern, WebSockets, Prefetch, URL Fragment Text Directives, Protected Audience, Loading Signed Exchanges, Web Application Manifest, Content Security Policy 3, CSS Pseudo-Elements 4, CSS Values 4, Network Error Logging, Payment Method Manifest, Referrer Policy, Selectors 4, Service Workers, WebRTC 1.0, WebTransport
fragment (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Display 4, CSS Positioned Layout 4, Layout Instability, CSS Snapshot 2022, CSS Snapshot 2023, CSS Anchor Positioning, CSS Grid Layout 1, CSS Grid Layout 2, CSS Inline Layout 3, CSS Layout API 1, CSS Multicol 1, CSS Rhythmic Sizing, CSS Text Decoration 3, CSS Writing Modes 4
GPURenderPipelineDescriptor.fragment (WebIDL dictionary member) §: Defined in WebGPU
GPUShaderStage.FRAGMENT (WebIDL constant) §: Defined in WebGPU
fragment parsing algorithm steps (concept) §: Defined in HTML; Referenced in HTML Sanitizer API, DOM Parsing and Serialization
fragment serializing algorithm steps (concept) §: Defined in HTML; Referenced in DOM Parsing and Serialization
fragment state (concept for basic URL parser ) §: Defined in URL; Referenced in HTML, URL Pattern
fragmentainer (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Grid Layout 3, CSS Snapshot 2022, CSS Snapshot 2023
fragmentation (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Display 4, CSS Snapshot 2022, CSS Snapshot 2023, CSS Containment 2, CSS Containment 3, CSS Inline Layout 3, CSS Multicol 1, CSS Paged Media 3
fragmentation break (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Model 4, CSS Layout API 1, CSS Overflow 4, CSS Positioned Layout 3
fragmentation container (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Containment 2, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Inline Layout 3, CSS Multicol 1, CSS Overflow 4, CSS Page Floats, CSS Positioned Layout 3
fragmentation context (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Model 4, CSS Containment 2, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Multicol 1, CSS Overflow 4, CSS Page Floats, CSS Text 4
fragmentation direction (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Overflow 4
fragmentation root (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
FragmentDirective (WebIDL interface) §: Defined in URL Fragment Text Directives; see also WebIDLPedia
Document.fragmentDirective (WebIDL attribute) §: Defined in URL Fragment Text Directives
fragmented flow (concept) §: Defined in CSS Fragmentation 3 , CSS Fragmentation 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Containment 2, CSS Overflow 4, CSS Positioned Layout 3
FragmentResult (WebIDL interface) §: Defined in CSS Layout API 1; Related terms: FragmentResult.[[block size]], FragmentResult.blockSize, FragmentResult.[[box]], FragmentResult.[[child fragments]], FragmentResult.[[data]], FragmentResult.[[inline size]], FragmentResult.inlineSize, FragmentResult.[[internal break token]], FragmentResult.[[unique id]], new FragmentResult(options); see also WebIDLPedia
new FragmentResult(options) (WebIDL constructor) §: Defined in CSS Layout API 1
FragmentResultOptions (WebIDL dictionary) §: Defined in CSS Layout API 1; Related terms: FragmentResultOptions.autoBlockSize, FragmentResultOptions.blockSize, FragmentResultOptions.breakToken, FragmentResultOptions.childFragments, FragmentResultOptions.data, FragmentResultOptions.inlineSize; see also WebIDLPedia
fragments (CSS value for continue ) §: Defined in CSS Overflow 4
"frame" (value for RequestDestination WebIDL enumeration) §: Defined in Fetch
frame (markup attribute for table ) §: Defined in HTML
frame (markup element) §: Defined in HTML; Referenced in CSS Display 4, Content Security Policy 3, CSS Display 3, Long Tasks API, Resource Timing, WebDriver
HTMLTableElement.frame (WebIDL attribute) §: Defined in HTML
SFrameTransformErrorEvent.frame (WebIDL attribute) §: Defined in WebRTC Encoded Transform
SFrameTransformErrorEventInit.frame (WebIDL dictionary member) §: Defined in WebRTC Encoded Transform
XRInputSourceEvent.frame (WebIDL attribute) §: Defined in WebXR Device API
XRInputSourceEventInit.frame (WebIDL dictionary member) §: Defined in WebXR Device API
ImageTrack.[[frame count]] (internal slot) §: Defined in WebCodecs
frame timing info (concept) §: Defined in Long Animation Frames API
frame-ancestors (concept) §: Defined in Content Security Policy 3; Referenced in HTML, Content Security Policy: Embedded Enforcement
frame-src (concept) §: Defined in Content Security Policy 3; Referenced in Fenced Frame
JsonLdProcessor.frame() (WebIDL operation) §: Defined in JSON-LD 1.1 Framing
frameborder (markup attribute for iframe ) §: Defined in HTML
HTMLFrameElement.frameBorder (WebIDL attribute) §: Defined in HTML
HTMLIFrameElement.frameBorder (WebIDL attribute) §: Defined in HTML
XRWebGLLayer.framebuffer (WebIDL attribute) §: Defined in WebXR Device API
XRWebGLLayer.framebufferHeight (WebIDL attribute) §: Defined in WebXR Device API
XRWebGLLayerInit.framebufferScaleFactor (WebIDL dictionary member) §: Defined in WebXR Device API
XRWebGLLayer.framebufferWidth (WebIDL attribute) §: Defined in WebXR Device API
AudioDataCopyToOptions.frameCount (WebIDL dictionary member) §: Defined in WebCodecs
ImageTrack.frameCount (WebIDL attribute) §: Defined in WebCodecs
JsonLdOptions.frameDefault (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Framing
OpusEncoderConfig.frameDuration (WebIDL dictionary member) §: Defined in Opus WebCodecs Registration
Window.frameElement (WebIDL attribute) §: Defined in HTML
JsonLdOptions.frameExpansion (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Processing Algorithms and API
RTCInboundRtpStreamStats.frameHeight (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.frameHeight (WebIDL dictionary member) §: Defined in WebRTC Statistics
ProfilerStack.frameId (WebIDL dictionary member) §: Defined in JS Self-Profiling API
RTCEncodedVideoFrameMetadata.frameId (WebIDL dictionary member) §: Defined in WebRTC Encoded Transform
ImageDecodeOptions.frameIndex (WebIDL dictionary member) §: Defined in WebCodecs
AudioDataCopyToOptions.frameOffset (WebIDL dictionary member) §: Defined in WebCodecs
VideoConfiguration.framerate (WebIDL dictionary member) §: Defined in Media Capabilities
VideoEncoderConfig.framerate (WebIDL dictionary member) §: Defined in WebCodecs
frameRate (concept) §: Defined in Screen Capture
MediaTrackCapabilities.frameRate (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackConstraintSet.frameRate (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSettings.frameRate (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSupportedConstraints.frameRate (WebIDL dictionary member) §: Defined in Media Capture and Streams
XRSession.frameRate (WebIDL attribute) §: Defined in WebXR Device API
frameratechange (event for XRSession ) §: Defined in WebXR Device API
FrameRequestCallback (WebIDL callback) §: Defined in HTML
ProfilerTrace.frames (WebIDL dictionary member) §: Defined in JS Self-Profiling API
RTCVideoSourceStats.frames (WebIDL dictionary member) §: Defined in WebRTC Statistics
Window.frames (WebIDL attribute) §: Defined in HTML
RTCInboundRtpStreamStats.framesAssembledFromMultiplePackets (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.framesDecoded (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.framesDropped (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.framesEncoded (WebIDL dictionary member) §: Defined in WebRTC Statistics
frameset (markup element) §: Defined in HTML; Referenced in CSS Display 4, Quirks Mode, CSS Display 3
framespacing (markup attribute for iframe ) §: Defined in HTML
RTCInboundRtpStreamStats.framesPerSecond (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.framesPerSecond (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCVideoSourceStats.framesPerSecond (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.framesReceived (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCInboundRtpStreamStats.framesRendered (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.framesSent (WebIDL dictionary member) §: Defined in WebRTC Statistics
FrameType (WebIDL enumeration) §: Defined in Service Workers; Related terms: value auxiliary, value nested, value none, value top-level; see also WebIDLPedia
Client.frameType (WebIDL attribute) §: Defined in Service Workers
RTCInboundRtpStreamStats.frameWidth (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCOutboundRtpStreamStats.frameWidth (WebIDL dictionary member) §: Defined in WebRTC Statistics
framework (concept) §: Defined in User Timing
ItemDetails.freeTrialPeriod (WebIDL dictionary member) §: Defined in Digital Goods API
Object.freeze(O) (WebIDL operation) §: Defined in ECMAScript; Referenced in Media Session
RTCInboundRtpStreamStats.freezeCount (WebIDL dictionary member) §: Defined in WebRTC Statistics
Sensor.[[frequency]] (internal slot) §: Defined in Generic Sensor API
<frequency> (CSS type) §: Defined in CSS Values 3 , CSS Values 4; Referenced in CSS Values 5, CSS Speech 1, CSS Typed OM 1, CSSOM; Related terms: CSS value Hz, CSS value kHz
<frequency> (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
frequency (CSS value for attr() ) §: Defined in CSS Values 5
"frequency" (value for CSSNumericBaseType WebIDL enumeration) §: Defined in CSS Typed OM 1
BiquadFilterNode.frequency (WebIDL attribute) §: Defined in Web Audio API
BiquadFilterOptions.frequency (WebIDL dictionary member) §: Defined in Web Audio API
CSSNumericType.frequency (WebIDL dictionary member) §: Defined in CSS Typed OM 1
OscillatorNode.frequency (WebIDL attribute) §: Defined in Web Audio API
OscillatorOptions.frequency (WebIDL dictionary member) §: Defined in Web Audio API
SensorOptions.frequency (WebIDL dictionary member) §: Defined in Generic Sensor API
<frequency-percentage> (CSS type) §: Defined in CSS Values 3 , CSS Values 4
AnalyserNode.frequencyBinCount (WebIDL attribute) §: Defined in Web Audio API
from (markup attribute for animate ) §: Defined in SVG Animations 2; Referenced in SVG 2
NavigationActivation.from (WebIDL attribute) §: Defined in HTML
NavigationCurrentEntryChangeEvent.from (WebIDL attribute) §: Defined in HTML
NavigationCurrentEntryChangeEventInit.from (WebIDL dictionary member) §: Defined in HTML
NavigationTransition.from (WebIDL attribute) §: Defined in HTML
from-font (CSS value for font-size-adjust ) §: Defined in CSS Fonts 5
from-font (CSS value for subscript-position-override!!descriptor, subscript-size-override!!descriptor, superscript-position-override!!descriptor, superscript-size-override!!descriptor ) §: Defined in CSS Fonts 5
from-font (CSS value for text-decoration-thickness ) §: Defined in CSS Text Decoration 4; Referenced in CSS Fonts 5
from-font (CSS value for text-underline-position ) §: Defined in CSS Text Decoration 4
"from-image" (value for ImageOrientation WebIDL enumeration) §: Defined in HTML
from-image (CSS value for image-orientation ) §: Defined in CSS Images 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
from-image (CSS value for image-resolution ) §: Defined in CSS Images 4
ReadableStream.from(asyncIterable) (WebIDL operation) §: Defined in Streams
Array.from(items, mapfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
ConvertCoordinateOptions.fromBox (WebIDL dictionary member) §: Defined in CSSOM View
String.fromCharCode(...codeUnits) (WebIDL operation) §: Defined in ECMAScript
String.fromCodePoint(...codePoints) (WebIDL operation) §: Defined in ECMAScript
CropTarget.fromElement() (WebIDL operation) §: Defined in Region Capture
RestrictionTarget.fromElement() (WebIDL operation) §: Defined in Element Capture
Object.fromEntries(iterable) (WebIDL operation) §: Defined in ECMAScript; Referenced in WebDriver BiDi
DOMMatrix.fromFloat32Array(array32) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMMatrixReadOnly.fromFloat32Array(array32) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMMatrix.fromFloat64Array(array64) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMMatrixReadOnly.fromFloat64Array(array64) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMMatrix.fromMatrix(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMMatrixReadOnly.fromMatrix(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMPoint.fromPoint(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMPointReadOnly.fromPoint(other) (WebIDL operation) §: Defined in Geometry Interfaces 1; Referenced in WebXR Layers API 1
FromPropertyDescriptor (algorithm) §: Defined in ECMAScript; Referenced in Web IDL
DOMQuad.fromQuad(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
JsonLdProcessor.fromRdf() (WebIDL operation) §: Defined in JSON-LD 1.1 Processing Algorithms and API
DOMQuad.fromRect(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMRect.fromRect(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
DOMRectReadOnly.fromRect(other) (WebIDL operation) §: Defined in Geometry Interfaces 1
FromValueType (algorithm) §: Defined in WebAssembly JavaScript Interface: Type Reflection; Referenced in WebAssembly JavaScript Interface: Exception Handling
"front" (value for GPUCullMode WebIDL enumeration) §: Defined in WebGPU
GPUPrimitiveState.frontFace (WebIDL dictionary member) §: Defined in WebGPU
Math.fround(x) (WebIDL operation) §: Defined in ECMAScript
"frozen" (value for ClientLifecycleState WebIDL enumeration) §: Defined in Page Lifecycle
frozen (concept) §: Defined in Page Lifecycle
"frozen" (value for RTCStatsIceCandidatePairState WebIDL enumeration) §: Defined in WebRTC Statistics
frozen array type (concept) §: Defined in Web IDL; Referenced in HTML, Service Workers, WebXR Device API
FrozenArray (WebIDL interface) §: Defined in Web IDL; Referenced in Font Metrics API 1, CSS View Transitions 2, WebXR Anchors, WebXR Plane Detection, WebXR Mesh Detection, Notifications API, Gamepad Extensions, Long Animation Frames API, Web NFC API, Web Bluetooth, Web Bluetooth Scanning, Cookie Store API, File and Directory Entries API, Layout Instability, Manifest Incubations, Shared Storage API, User-Agent Client Hints, Web App Launch Handler API, Web Preferences API, WebHID API, WebUSB API, Clipboard API and events, Compute Pressure 1, Contact Picker API, CSS Cascading 5, CSS Font Loading 3, CSS Layout API 1, Gamepad, Intersection Observer, Long Tasks API, Media Session, Orientation Sensor, Payment Handler API, Performance Timeline, Presentation API, Push API, Resize Observer, Server Timing, Service Workers, WAI-ARIA, WAI-ARIA, Web Audio API, WebGPU, WebRTC 1.0, WebXR Hit Test, WebXR Device API, WebXR Layers API 1, Window Management; see also WebIDLPedia
fuchsia (concept) §: Defined in CSS Color 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
fuchsia (CSS value for <color>, <named-color> type ) §: Defined in CSS Color 4 , CSS 2.2
FulfillPromise (algorithm) §: Defined in ECMAScript
full glyph cell (concept) §: Defined in SVG 2
VideoColorSpace.[[full range]] (internal slot) §: Defined in WebCodecs
full version (concept for user agent ) §: Defined in User-Agent Client Hints
full-size-kana (CSS value for text-transform ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
full-width (CSS value for font-variant-east-asian ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
full-width (CSS value for text-transform ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
FontData.fullName (WebIDL attribute) §: Defined in Local Font Access
FileSystemEntry.fullPath (WebIDL attribute) §: Defined in File and Directory Entries API
VideoColorSpace.fullRange (WebIDL attribute) §: Defined in WebCodecs
VideoColorSpaceInit.fullRange (WebIDL dictionary member) §: Defined in WebCodecs
:fullscreen (CSS selector) §: Defined in Fullscreen API , Selectors 4; Referenced in Media Queries 5
fullscreen (concept for display mode ) §: Defined in Web Application Manifest; Referenced in Media Queries 5
fullscreen (CSS value for display-mode descriptor of @media @rule ) §: Defined in Media Queries 5
Document.fullscreen (WebIDL attribute) §: Defined in Fullscreen API
fullscreen element (concept) §: Defined in Fullscreen API; Referenced in HTML, Keyboard Lock
fullscreenchange (event for Document, Element interface ) §: Defined in Fullscreen API; Referenced in HTML
DocumentOrShadowRoot.fullscreenElement (WebIDL attribute) §: Defined in Fullscreen API; Referenced in Picture-in-Picture
Document.fullscreenEnabled (WebIDL attribute) §: Defined in Fullscreen API
fullscreenerror (event for Document, Element interface ) §: Defined in Fullscreen API
FullscreenNavigationUI (WebIDL enumeration) §: Defined in Fullscreen API; Related terms: value auto, value hide, value show; see also WebIDLPedia
FullscreenOptions (WebIDL dictionary) §: Defined in Fullscreen API; Referenced in Window Management; Related terms: FullscreenOptions.navigationUI, FullscreenOptions.screen; see also WebIDLPedia
UADataValues.fullVersionList (WebIDL dictionary member) §: Defined in User-Agent Client Hints
Fullwidth (concept) §: Defined in Internationalization Glossary
fully active (concept for Document ) §: Defined in HTML; Referenced in CSS View Transitions 2, Fullscreen API, requestStorageAccessFor API, The Storage Access API, Long Animation Frames API, The Capture-Handle Actions Mechanism, Web Bluetooth, Web Bluetooth Scanning, Prefetch, Prerendering Revamped, Speculation Rules, Shared Storage API, Private State Token API, Web Preferences API, Badging API, Compute Pressure 1, CSSOM View, EditContext API, Event Timing API, Gamepad, Geolocation API, Media Capture and Streams, Viewport Capture, Media Session, Paint Timing, Payment Request API 1.1, Permissions, Screen Capture, Screen Orientation, Screen Wake Lock API, Service Workers, Web Locks API, Web Share API, Web Audio API, XMLHttpRequest
fully active descendant of a top-level traversable with user attention (concept for Document ) §: Defined in HTML
Fully Expand a Font Subset (algorithm) §: Defined in Incremental Font Transfer
fully populated Property Descriptor (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in HTML, Temporal, Web IDL
fully read (concept for body ) §: Defined in Fetch
fully unlock the screen orientation steps (concept) §: Defined in Screen Orientation; Referenced in Fullscreen API
"funcref" (value for TableKind WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Type Reflection
"funcref" (value for ValueType WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Type Reflection
Function (WebIDL interface) §: Defined in ECMAScript , WebAssembly JavaScript Interface: Type Reflection; Related terms: new Function(...parameterArgs, bodyArg), new Function(descriptor, callable), Function.apply(thisArg, argArray), Function.bind(thisArg, ...args), Function.call(thisArg, ...args), Function.toString(), Function.type(); see also WebIDLPedia
Function (WebIDL callback) §: Defined in Web IDL; Referenced in Streams, Long Animation Frames API, Shared Storage API, Trusted Types
"function" (value for ImportExportKind WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Content Security Policy , WebAssembly JavaScript Interface: Exception Handling , WebAssembly JavaScript Interface: Promise Integration , WebAssembly JavaScript Interface: Threading , WebAssembly JavaScript Interface
"function" (value for ExternKind WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Type Reflection
function (concept for CSS ) §: Defined in CSS Syntax 3; Referenced in Shared Storage API, CSS Snapshot 2022, CSS Snapshot 2023, CSS Painting API 1
Function code (concept for ECMAScript ) §: Defined in ECMAScript
Function Environment Record (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management; Related terms: algorithm BindThisValue(V), algorithm GetSuperBase(), algorithm GetThisBinding(), algorithm HasSuperBinding(), algorithm HasThisBinding()
function object (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Internationalization API, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, JSON.parse source text access, Set methods, ShadowRealm API, Source Phase Imports, Temporal, Web IDL
<function-token> (CSS type) §: Defined in CSS Syntax 3; Referenced in CSS Values 3, CSS Values 4, Media Queries 4, Media Queries 5, Selectors 4
%Function.prototype% (WebIDL interface) §: Defined in ECMAScript; Referenced in HTML, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, ShadowRealm API, Source Phase Imports, Temporal, Web IDL; see also WebIDLPedia
new Function(...parameterArgs, bodyArg) (WebIDL constructor) §: Defined in ECMAScript
new Function(descriptor, callable) (WebIDL constructor) §: Defined in WebAssembly JavaScript Interface: Type Reflection
%Function% (WebIDL interface) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports; see also WebIDLPedia
Functional events (concept for service worker ) §: Defined in Service Workers
functional notation (concept) §: Defined in CSS Values 3 , CSS Values 4; Referenced in CSS Color 6, CSS Values 5, CSS Snapshot 2022, CSS Snapshot 2023, CSS Color 4, CSS Lists 3, Scroll-driven Animations
functional pseudo-class (concept) §: Defined in Selectors 4; Referenced in Quirks Mode
functional pseudo-element (concept) §: Defined in Selectors 4; Referenced in CSS View Transitions 1
FunctionDeclarationInstantiation (algorithm) §: Defined in ECMAScript
FunctionStringCallback (WebIDL callback) §: Defined in HTML
FunctionType (WebIDL dictionary) §: Defined in WebAssembly JavaScript Interface: Type Reflection; Related terms: FunctionType.parameters, FunctionType.results; see also WebIDLPedia
furthest ancestral SVG viewport (concept) §: Defined in SVG 2
:future (CSS selector) §: Defined in Selectors 4
fwd_distance (concept) §: Defined in AV1 Codec ISO Media File Format Binding
fx (markup attribute for radialGradient ) §: Defined in SVG 2
SVGRadialGradientElement.fx (WebIDL attribute) §: Defined in SVG 2
fy (markup attribute for radialGradient ) §: Defined in SVG 2
SVGRadialGradientElement.fy (WebIDL attribute) §: Defined in SVG 2