Terms starting with letter e

Color key: WebIDL CSS Markup HTTP

Math.E (WebIDL constant) §: Defined in ECMAScript
e (CSS value for calc() ) §: Defined in CSS Values 4
DOMMatrix.e (WebIDL attribute) §
DOMMatrixReadOnly.e (WebIDL attribute) §: Defined in Geometry Interfaces 1
DOMMatrix2DInit.e (WebIDL dictionary member) §: Defined in Geometry Interfaces 1
JsonWebKey.e (WebIDL dictionary member) §: Defined in Web Cryptography API
e-resize (CSS value for cursor ) §: Defined in CSS User Interface 3 , CSS User Interface 4 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
"eac-r11snorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"eac-r11unorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"eac-rg11snorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"eac-rg11unorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
each-line (CSS value for text-indent ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
eager (value for loading attribute of iframe element, loading attribute of img element ) §: Defined in HTML
"ean_13" (value for BarcodeFormat WebIDL enumeration) §: Defined in Accelerated Shape Detection in Images
"ean_8" (value for BarcodeFormat WebIDL enumeration) §: Defined in Accelerated Shape Detection in Images
early error (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, JSON.parse source text access
Earth’s reference coordinate system (concept) §: Defined in Orientation Sensor; Referenced in DeviceOrientation Event
ease (CSS value for <cubic-bezier-easing-function> ) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
ease-in (CSS value for <cubic-bezier-easing-function> ) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Values 3, CSS Values 4
ease-in-out (CSS value for <cubic-bezier-easing-function> ) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
ease-out (CSS value for <cubic-bezier-easing-function> ) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Values 3, CSS Values 4
BaseComputedKeyframe.easing (WebIDL dictionary member) §: Defined in Web Animations
BaseKeyframe.easing (WebIDL dictionary member) §: Defined in Web Animations
BasePropertyIndexedKeyframe.easing (WebIDL dictionary member) §: Defined in Web Animations
EffectTiming.easing (WebIDL dictionary member) §: Defined in Web Animations; Referenced in Web Animations 2
OptionalEffectTiming.easing (WebIDL dictionary member) §: Defined in Web Animations
easing function (concept) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Positioned Layout 4, CSS Values 5, CSS Snapshot 2022, CSS Snapshot 2023, CSS Animations 2, CSS Transitions 2, CSS Values 4, Web Animations, Web Animations 2
<easing-function> (CSS type) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Values 5, CSS Animations 2, CSS Transitions, CSS Transitions 2, CSS Values 3, CSS Values 4, Web Animations; Related terms: CSS value linear, CSS value linear
<east-asian-variant-values> (CSS type) §: Defined in CSS Fonts 4
<east-asian-width-values> (CSS type) §: Defined in CSS Fonts 4
EcdhKeyDeriveParams (WebIDL dictionary) §: Defined in Web Cryptography API; Related terms: EcdhKeyDeriveParams.public; see also WebIDLPedia
EcdsaParams (WebIDL dictionary) §: Defined in Web Cryptography API; Related terms: EcdsaParams.hash; see also WebIDLPedia
MediaTrackCapabilities.echoCancellation (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackConstraintSet.echoCancellation (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSettings.echoCancellation (WebIDL dictionary member) §: Defined in Media Capture and Streams
MediaTrackSupportedConstraints.echoCancellation (WebIDL dictionary member) §: Defined in Media Capture and Streams
RTCAudioSourceStats.echoReturnLoss (WebIDL dictionary member) §: Defined in WebRTC Statistics
RTCAudioSourceStats.echoReturnLossEnhancement (WebIDL dictionary member) §: Defined in WebRTC Statistics
EcKeyAlgorithm (WebIDL dictionary) §: Defined in Web Cryptography API; Related terms: EcKeyAlgorithm.namedCurve; see also WebIDLPedia
EcKeyGenParams (WebIDL dictionary) §: Defined in Web Cryptography API; Related terms: EcKeyGenParams.namedCurve; see also WebIDLPedia
EcKeyImportParams (WebIDL dictionary) §: Defined in Web Cryptography API; Related terms: EcKeyImportParams.namedCurve; see also WebIDLPedia
ECMAScript code execution contexts (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in JSON modules, ShadowRealm API, Source Phase Imports
ECMAScript language type (concept for ECMAScript ) §: Defined in ECMAScript
ECMAScript language value (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Internationalization API, Uint8Array to/from base64, ArrayBuffer transfer, Intl.DurationFormat, Iterator Helpers, JSON.parse source text access, Set methods, ShadowRealm API, Temporal, Protected Audience
ECMAScript source text (concept for ECMAScript ) §: Defined in ECMAScript
economy (CSS value for print-color-adjust ) §: Defined in CSS Color Adjustment 1
Ed448Params (WebIDL dictionary) §: Defined in Secure Curves in the Web Cryptography API; Related terms: Ed448Params.context; see also WebIDLPedia
"edge" (value for MLPaddingMode WebIDL enumeration) §: Defined in Web Neural Network API
edgeMode (markup attribute for feConvolveMatrix ) §: Defined in Filter Effects 1
edgeMode (markup attribute for feGaussianBlur ) §: Defined in Filter Effects 1
SVGFEConvolveMatrixElement.edgeMode (WebIDL attribute) §: Defined in Filter Effects 1
SVGFEGaussianBlurElement.edgeMode (WebIDL attribute) §: Defined in Filter Effects 1
HTMLElement.editContext (WebIDL attribute) §: Defined in EditContext API
EditContext (WebIDL interface) §: Defined in EditContext API; Related terms: EditContext.characterBoundsRangeStart, EditContext.oncharacterboundsupdate, EditContext.oncompositionend, EditContext.oncompositionstart, EditContext.ontextformatupdate, EditContext.ontextupdate, EditContext.selectionEnd, EditContext.selectionStart, EditContext.text, WebIDL constructor constructor(), EditContext.attachedElements(), EditContext.characterBounds(), EditContext.updateCharacterBounds(), EditContext.updateControlBounds(), EditContext.updateSelection(), EditContext.updateSelectionBounds(), EditContext.updateText(); see also WebIDLPedia
EditContext editing host (concept) §: Defined in EditContext API; Referenced in Input Events 2
EditContextInit (WebIDL dictionary) §: Defined in EditContext API; Related terms: EditContextInit.selectionEnd, EditContextInit.selectionStart, EditContextInit.text; see also WebIDLPedia
editing host (concept) §: Defined in HTML; Referenced in Clipboard API and events, CSS Scroll Anchoring 1, EditContext API, Input Events 2, Selection API, VirtualKeyboard API
Editor’s Draft (concept) §: Defined in W3C Process Document
Editor’s Draft (concept) §: Defined in CSS Snapshot 2022 , CSS Snapshot 2023
Animation.effect (WebIDL attribute) §: Defined in Web Animations; Referenced in CSS Animations 2
effect target (concept for keyframe effect ) §: Defined in Web Animations; Related terms: concept target element, concept target pseudo-selector
DataTransfer.effectAllowed (WebIDL attribute) §: Defined in HTML
EffectCallback (WebIDL callback) §: Defined in Web Animations 2
effective (concept for credential ) §: Defined in Credential Management 1
effective buffer binding size (algorithm) §: Defined in WebGPU; Referenced in WebGPU Shading Language
effective directive (concept for violation ) §: Defined in Content Security Policy 3
effective directive (concept for request ) §: Defined in Content Security Policy 3
effective directive value (concept) §: Defined in Content Security Policy: Embedded Enforcement
effective domain (concept) §: Defined in HTML; Referenced in Web Authentication
effective enabled permissions (concept for fenced frame config ) §: Defined in Fenced Frame; Referenced in Protected Audience
effective enabled permissions (concept for fenced frame config instance ) §: Defined in Fenced Frame
effective media volume (concept for HTMLMediaElement ) §: Defined in HTML; Referenced in Selectors 4
effective overload set (concept) §: Defined in Web IDL
effective sandbox flags (concept for fenced frame config ) §: Defined in Fenced Frame; Referenced in Protected Audience
effective sandbox flags (concept for fenced frame config instance ) §: Defined in Fenced Frame
effective visual size (concept) §: Defined in Largest Contentful Paint
EffectiveConnectionType (WebIDL enumeration) §: Defined in Network Information API; Related terms: value 2g, value 3g, value 4g, value slow-2g; see also WebIDLPedia
CSPViolationReportBody.effectiveDirective (WebIDL attribute) §: Defined in Content Security Policy 3
SecurityPolicyViolationEvent.effectiveDirective (WebIDL attribute) §: Defined in Content Security Policy 3
SecurityPolicyViolationEventInit.effectiveDirective (WebIDL dictionary member) §: Defined in Content Security Policy 3
NetworkInformation.effectiveType (WebIDL attribute) §: Defined in Network Information API
GamepadHapticActuator.effects (WebIDL attribute) §: Defined in Gamepad
EffectTiming (WebIDL dictionary) §: Defined in Web Animations; Referenced in CSS Animation Worklet API, Web Animations 2; Related terms: undefineddelay, EffectTiming.direction, undefinedduration, EffectTiming.easing, undefinedendDelay, EffectTiming.fill, EffectTiming.iterations, EffectTiming.iterationStart, EffectTiming.playbackRate; see also WebIDLPedia
"eject" (value for SmartCardDisposition WebIDL enumeration) §: Defined in Web Smart Card API
AnimationEvent.elapsedTime (WebIDL attribute) §: Defined in CSS Animations 1; Referenced in CSS Animations 2, CSS Transitions
AnimationEventInit.elapsedTime (WebIDL dictionary member) §: Defined in CSS Animations 1
SpeechSynthesisEvent.elapsedTime (WebIDL attribute) §: Defined in Web Speech API
SpeechSynthesisEventInit.elapsedTime (WebIDL dictionary member) §: Defined in Web Speech API
TransitionEvent.elapsedTime (WebIDL attribute) §: Defined in CSS Transitions; Referenced in CSS Transitions 2
TransitionEventInit.elapsedTime (WebIDL dictionary member) §: Defined in CSS Transitions
elected groups (concept) §: Defined in W3C Process Document
CropTarget.[[Element]] (internal slot) §: Defined in Region Capture
RestrictionTarget.[[Element]] (internal slot) §: Defined in Element Capture
Element (WebIDL interface) §: Defined in DOM; Referenced in Font Metrics API 1, CSS Positioned Layout 4, CSS Scroll Snap 2, Fullscreen API, Element Capture, Long Animation Frames API, WebDriver BiDi, Scripting Policy, Element Timing API, Fenced Frame, Ink API, Layout Instability, Speculation Rules, HTML Sanitizer API, Content Security Policy 3, CSS Spatial Navigation 1, CSS Pseudo-Elements 4, CSS Regions 1, CSS Shadow Parts, CSS Typed OM 1, CSS View Transitions 1, CSSOM, CSSOM View, Intersection Observer, Largest Contentful Paint, MathML Core, Region Capture, Paint Timing, Permissions Policy, Picture-in-Picture, Pointer Events, Pointer Lock 2.0, Resize Observer, Scroll-driven Animations, Trusted Types, WAI-ARIA, WAI-ARIA, Web Animations, Web Animations 2, WebDriver, WebXR DOM Overlays; Related terms: concept attribute list, concept class, concept custom, concept custom element definition, concept custom element state, concept defined, concept get the attr-associated element, concept get the attr-associated elements, concept get the bounding box, concept ID, concept is value, concept local name, concept namespace, concept namespace prefix, concept qualified name, concept shadow host, concept shadow root, Element.attributes, Element.classList, Element.className, Element.clientHeight, Element.clientLeft, Element.clientTop, Element.clientWidth, Element.[[computedStyleMapCache]], Element.currentCSSZoom, Element.elementTiming, Element.id, Element.innerHTML, Element.localName, Element.namespaceURI, undefinedonfullscreenchange, undefinedonfullscreenerror, Element.outerHTML, Element.part, Element.prefix, Element.[[RegisteredIntersectionObservers]], Element.schemaTypeInfo, Element.scrollHeight, Element.scrollLeft, Element.scrollTop, Element.scrollWidth, Element.shadowRoot, Element.slot, Element.tagName, event contentvisibilityautostatechange, event fullscreenchange, event fullscreenerror, event scroll, event scrollend, Element.attachShadow(init), Element.checkVisibility(options), Element.closest(selectors), Element.computedStyleMap(), Element.focusableAreas(option), Element.getAttribute(qualifiedName), Element.getAttributeNames(), Element.getAttributeNode(qualifiedName), Element.getAttributeNodeNS(namespace, localName), Element.getAttributeNS(namespace, localName), Element.getBoundingClientRect(), Element.getClientRects(), Element.getElementsByClassName(classNames), Element.getElementsByTagName(qualifiedName), Element.getElementsByTagNameNS(namespace, localName), Element.getHTML(options), Element.getSpatialNavigationContainer(), Element.hasAttribute(qualifiedName), Element.hasAttributeNS(namespace, localName), Element.hasAttributes(), Element.hasPointerCapture(), Element.insertAdjacentElement(where, element), Element.insertAdjacentHTML(position, string), Element.insertAdjacentText(where, data), Element.matches(selectors), Element.pseudo(type), Element.releasePointerCapture(), Element.removeAttribute(qualifiedName), Element.removeAttributeNode(attr), Element.removeAttributeNS(namespace, localName), Element.requestFullscreen(options), Element.requestPointerLock(), Element.scroll(x, y), Element.scrollBy(x, y), Element.scrollIntoView(arg), Element.scrollTo(x, y), Element.setAttribute(qualifiedName, value), Element.setAttributeNode(attr), Element.setAttributeNodeNS(attr), Element.setAttributeNS(namespace, qualifiedName, value), Element.setHTML(html, options), Element.setHTMLUnsafe(html, options), Element.setHTMLUnsafe(html), Element.setIdAttribute(), Element.setIdAttributeNode(), Element.setIdAttributeNS(), Element.setPointerCapture(), Element.spatialNavigationSearch(dir, options), Element.spatialNavigationSearch(options), Element.toggleAttribute(qualifiedName, force), Element.webkitMatchesSelector(selectors); see also WebIDLPedia
element (concept) §: Defined in DOM; Referenced in CSS Positioned Layout 4, CSS Values 5, Fetch, Fullscreen API, HTML, MathML Accessibility API Mappings 1.0, Web IDL, Scripting Policy, Fenced Frame, URL Fragment Text Directives, Soft Navigations, Accessible Name and Description Computation 1.2, Core Accessibility API Mappings 1.2, Content Security Policy: Embedded Enforcement, CSS Color 4, CSS Layout API 1, CSS Scoping 1, CSSOM View, HTML Accessibility API Mappings 1.0, Largest Contentful Paint, MathML Core, Paint Timing, Permissions Policy, Pointer Lock 2.0, WAI-ARIA, WAI-ARIA, WebDriver
element (concept for NamedNodeMap ) §: Defined in DOM
element (concept for Attr ) §: Defined in DOM
element (concept for violation ) §: Defined in Content Security Policy 3
element (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
AnyExternType.element (WebIDL dictionary member) §: Defined in WebAssembly JavaScript Interface: Type Reflection
CSSPseudoElement.element (WebIDL attribute) §: Defined in CSS Pseudo-Elements 4
LargestContentfulPaint.element (WebIDL attribute) §: Defined in Largest Contentful Paint
PerformanceElementTiming.element (WebIDL attribute) §: Defined in Element Timing API
TableDescriptor.element (WebIDL dictionary member) §
TableDescriptor.element (WebIDL dictionary member) §
TableDescriptor.element (WebIDL dictionary member) §
TableDescriptor.element (WebIDL dictionary member) §
TableDescriptor.element (WebIDL dictionary member) §: 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
TableType.element (WebIDL dictionary member) §: Defined in WebAssembly JavaScript Interface: Type Reflection
element contents (concept) §: Defined in CSS Containment 2; Referenced in CSS View Transitions 1
element interface (concept) §: Defined in DOM; Referenced in HTML, Trusted Types
element tree (concept for CSS ) §: Defined in CSS Display 4 , CSS Display 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Model 4
element with default preferred size (concept) §: Defined in CSS User Interface 4
Node.ELEMENT_NODE (WebIDL constant) §: Defined in DOM
element-not-rendered (concept) §: Defined in CSS Images 4
element() (CSS function) §: Defined in CSS GCPM 3
element() (CSS function) §: Defined in CSS Images 4
ElementContentEditable (WebIDL interface) §: Defined in HTML; Related terms: ElementContentEditable.contentEditable, ElementContentEditable.enterKeyHint, ElementContentEditable.inputMode, ElementContentEditable.isContentEditable, ElementContentEditable.virtualKeyboardPolicy; see also WebIDLPedia
ElementCreationOptions (WebIDL dictionary) §: Defined in DOM; Related terms: ElementCreationOptions.is; see also WebIDLPedia
ElementCSSInlineStyle (WebIDL interface) §: Defined in CSSOM; Referenced in CSS Typed OM 1; Related terms: ElementCSSInlineStyle.attributeStyleMap, ElementCSSInlineStyle.style; see also WebIDLPedia
ElementDefinitionOptions (WebIDL dictionary) §: Defined in HTML; see also WebIDLPedia
Document.elementFromPoint(x, y) (WebIDL operation) §: Defined in CSSOM View
ElementInternals (WebIDL interface) §: Defined in HTML; Referenced in Custom State Pseudo Class, ARIA in HTML, WAI-ARIA, WAI-ARIA; Related terms: concept get the attr-associated element, concept get the attr-associated elements, ElementInternals.form, ElementInternals.labels, ElementInternals.shadowRoot, ElementInternals.states, ElementInternals.validationMessage, ElementInternals.validity, ElementInternals.willValidate, ElementInternals.checkValidity(), ElementInternals.reportValidity(), ElementInternals.setFormValue(value, state), ElementInternals.setValidity(flags, message, anchor); see also WebIDLPedia
HTMLFieldSetElement.elements (WebIDL attribute) §: Defined in HTML
HTMLFormElement.elements (WebIDL attribute) §: Defined in HTML
SanitizerConfig.elements (WebIDL dictionary member) §: Defined in HTML Sanitizer API
Document.elementsFromPoint(x, y) (WebIDL operation) §: Defined in CSSOM View
elementSources (WebIDL attribute for CSS ) §: Defined in CSS Images 4
Element.elementTiming (WebIDL attribute) §: Defined in Element Timing API
elevation (CSS property) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1
elevation (markup attribute for feDistantLight ) §: Defined in Filter Effects 1
SVGFEDistantLightElement.elevation (WebIDL attribute) §: Defined in Filter Effects 1
eligibility (concept) §: Defined in Attribution Reporting
eligible for same-party membership when embedded within (concept) §: Defined in User Agent Interaction with Related Website Sets
ellipse (CSS value for <radial-shape> ) §: Defined in CSS Images 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
ellipse (markup element) §: Defined in SVG 2; Related terms: markup attribute requiredExtensions, markup attribute systemLanguage
ellipse() (CSS function for <basic-shape> ) §: Defined in CSS Shapes 1; Referenced in CSS Shapes 2, Motion Path 1
CanvasPath.ellipse(x, y, radiusX, radiusY, rotation, startAngle, endAngle, counterclockwise) (WebIDL operation) §: Defined in HTML
ellipsis (CSS value for text-overflow ) §: Defined in CSS Overflow 3 , CSS Overflow 4 , CSS User Interface 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
@else (CSS @rule) §: Defined in CSS Conditional 5
MLGraphBuilder.elu(input, options) (WebIDL operation) §: Defined in Web Neural Network API
MLGraphBuilder.elu(options) (WebIDL operation) §: Defined in Web Neural Network API
em (markup element) §: Defined in HTML; Referenced in CSS Color Adjustment 1, HTML Accessibility API Mappings 1.0, ARIA in HTML, Selectors 4, WAI-ARIA, WAI-ARIA
em (CSS value for <length> ) §: Defined in CSS Values 3 , CSS Values 4 , CSS 2.2; Referenced in CSS Conditional Values 1, CSS Variables 2, CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSS Containment 3, CSS Fonts 4, CSS Fonts 5, CSS Inline Layout 3, CSS Paged Media 3, CSS Properties and Values API 1, CSS Text 4, CSS Typed OM 1, CSS Variables 1, Media Queries 4, Media Queries 5, Web Animations
em (unit) (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
em-over baseline (concept) §: Defined in CSS Inline Layout 3
em-under baseline (concept) §: Defined in CSS Inline Layout 3
em(value) (WebIDL operation for CSS ) §: Defined in CSS Typed OM 1
email (value for type attribute of input element ) §: Defined in HTML
email (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
email (value for inputmode attribute of html-global ) §: Defined in HTML
"email" (value for ContactProperty WebIDL enumeration) §: Defined in Contact Picker API
Email (state of markup element for input ) §: Defined in HTML
ContactInfo.email (WebIDL dictionary member) §: Defined in Contact Picker API
IdentityProviderAccount.email (WebIDL dictionary member) §: Defined in Federated Credential Management API
IdentityUserInfo.email (WebIDL dictionary member) §: Defined in Federated Credential Management API
"embed" (value for RequestDestination WebIDL enumeration) §: Defined in Fetch
embed (markup element) §: Defined in HTML; Referenced in CSS Display 4, Scripting Policy, Content Security Policy 3, CSS Display 3, EPUB 3.3, HTML Accessibility API Mappings 1.0, ARIA in HTML, Long Tasks API, Resource Timing; Related terms: markup attribute align, markup attribute height, markup attribute hspace, markup attribute name, markup attribute src, markup attribute type, markup attribute vspace, markup attribute width
embed (CSS value for unicode-bidi ) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Ruby Annotation Layout 1
JsonLdOptions.embed (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Framing
Embedded content (concept) §: Defined in HTML; Referenced in The <model> element, Fenced Frame, EPUB 3.3, ARIA in HTML
embedded document (concept) §: Defined in SVG Integration
embedded proof (concept) §: Defined in Verifiable Credentials Data Model v2.0
embedder policy (concept) §: Defined in HTML; Related terms: concept report only reporting endpoint, concept report only value, concept reporting endpoint, concept value
embedder policy (concept for policy container ) §: Defined in HTML; Referenced in Fetch, Iframe credentialless, Fenced Frame
embedder policy (concept for WorkerGlobalScope ) §: Defined in HTML
embedder policy value (concept) §: Defined in HTML; Referenced in Fetch; Related terms: concept credentialless, concept require-corp, concept unsafe-none
embedder shared storage context (concept for fenced frame config ) §: Defined in Fenced Frame; Referenced in Protected Audience
embedder shared storage context (concept for fenced frame config instance ) §: Defined in Fenced Frame
embedding document (concept) §: Defined in Mixed Content; Referenced in Upgrade Insecure Requests
Document.embeds (WebIDL attribute) §: Defined in HTML
embossed (CSS value for @media ) §: Defined in CSS 2.2 , Media Queries 4 , Media Queries 5; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
FontMetrics.emHeightAscent (WebIDL attribute) §: Defined in Font Metrics API 1
TextMetrics.emHeightAscent (WebIDL attribute) §: Defined in HTML
FontMetrics.emHeightDescent (WebIDL attribute) §: Defined in Font Metrics API 1
TextMetrics.emHeightDescent (WebIDL attribute) §: Defined in HTML
emit an event (concept) §: Defined in WebDriver BiDi; Referenced in Web Bluetooth
emoji (CSS value for font-variant-emoji ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
emptied (event for HTMLMediaElement ) §: Defined in HTML; Referenced in Media Source Extensions™
:empty (CSS selector) §: Defined in Selectors 3 , Selectors 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
empty (concept for Node ) §: Defined in DOM
empty (concept for list, queue , set element, stack ) §: Defined in Infra; Referenced in Console, DOM, Encoding, Federated Credential Management API, Fullscreen API, HTML, Notifications API, Navigational-Tracking Mitigations, URL, WebDriver BiDi, Web IDL, Background Fetch, File System Access, Manifest Incubations, Prefetch, Prerendering Revamped, HTML Sanitizer API, Prioritized Task Scheduling, URL Fragment Text Directives, Shared Storage API, Private State Token API, Protected Audience, WebHID API, Loading Signed Exchanges, WebUSB API, Clear Site Data, Compute Pressure 1, Contact Picker API, Credential Management 1, CSS Layout API 1, CSS Spatial Navigation 1, CSS Painting API 1, CSS Typed OM 1, MediaStreamTrack Insertable Media Processing using Streams, Web Authentication, WebGPU, Web Neural Network API, WebTransport, XMLHttpRequest
empty (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
"empty" (value for RTCEncodedVideoFrameType WebIDL enumeration) §: Defined in WebRTC Encoded Transform
SmartCardReaderStateFlagsIn.empty (WebIDL dictionary member) §: Defined in Web Smart Card API
SmartCardReaderStateFlagsOut.empty (WebIDL dictionary member) §: Defined in Web Smart Card API
FileReader.EMPTY (WebIDL constant) §: Defined in File API
empty candidate execution (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in HTML, Protected Audience
empty host (concept) §: Defined in URL; Referenced in Navigational-Tracking Mitigations, WebOTP API, File API, Web Authentication
empty permissions policy (concept) §: Defined in Permissions Policy
empty-cells (CSS property) §: Defined in CSS Table 3 , CSS 2.1 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Typed OM 1; Related terms: CSS value hide, CSS value show
Selection.empty() (WebIDL operation) §: Defined in Selection API
TrustedTypePolicyFactory.emptyHTML (WebIDL attribute) §: Defined in Trusted Types
EmptyMatcher (algorithm) §: Defined in ECMAScript
TrustedTypePolicyFactory.emptyScript (WebIDL attribute) §: Defined in Trusted Types
XRPose.emulatedPosition (WebIDL attribute) §: Defined in WebXR Device API
enable a CSS style sheet set (concept) §: Defined in CSSOM
NavigationPreloadManager.enable() (WebIDL operation) §: Defined in Service Workers
GenerateBidInterestGroup.enableBiddingSignalsPrioritization (WebIDL dictionary member) §: Defined in Protected Audience
:enabled (CSS selector) §: Defined in Selectors 3 , Selectors 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS User Interface 4
enabled (CSS value for scripting descriptor of @media @rule ) §: Defined in Media Queries 5
AudioTrack.enabled (WebIDL attribute) §: Defined in HTML; Referenced in Media Source Extensions™, Media Capture from DOM Elements
AuthenticationExtensionsPRFOutputs.enabled (WebIDL dictionary member) §: Defined in Web Authentication
MediaStreamTrack.enabled (WebIDL attribute) §: Defined in Media Capture and Streams; Referenced in MediaStream Recording
NavigationPreloadState.enabled (WebIDL dictionary member) §: Defined in Service Workers
enabled CSS style sheet set (concept) §: Defined in CSSOM
PaymentManager.enableDelegations() (WebIDL operation) §: Defined in Payment Handler API
XRSession.enabledFeatures (WebIDL attribute) §: Defined in WebXR Device API
MimeType.enabledPlugin (WebIDL attribute) §: Defined in HTML
PositionOptions.enableHighAccuracy (WebIDL dictionary member) §: Defined in Geolocation API
encode (concept) §: Defined in Encoding; Referenced in HTML
Encode (algorithm) §: Defined in ECMAScript
encode or fail (concept) §: Defined in Encoding; Referenced in URL
AudioEncoder.encode(data) (WebIDL operation) §: Defined in WebCodecs
VideoEncoder.encode(frame, options) (WebIDL operation) §: Defined in WebCodecs
TextEncoder.encode(input) (WebIDL operation) §: Defined in Encoding
ImageDecoder.[[encoded data]] (internal slot) §: Defined in WebCodecs
encoded size (concept for response body info ) §: Defined in Fetch; Referenced in WebDriver BiDi, Resource Timing, Service Workers
EncodedAudioChunk (WebIDL interface) §: Defined in WebCodecs; Referenced in AAC WebCodecs Registration, A-law PCM WebCodecs Registration, WebCodecs Codec Registry, FLAC WebCodecs Registration, MP3 WebCodecs Registration, Opus WebCodecs Registration, Linear PCM WebCodecs Registration, u-law PCM WebCodecs Registration, Vorbis WebCodecs Registration; Related terms: EncodedAudioChunk.[[byte length]], EncodedAudioChunk.byteLength, undefined[[duration]], EncodedAudioChunk.[[internal data]], undefined[[timestamp]], undefined[[type]], new EncodedAudioChunk(init), EncodedAudioChunk.copyTo(destination); see also WebIDLPedia
new EncodedAudioChunk(init) (WebIDL constructor) §: Defined in WebCodecs
EncodedAudioChunkInit (WebIDL dictionary) §: Defined in WebCodecs; Related terms: EncodedAudioChunkInit.data, EncodedAudioChunkInit.duration, EncodedAudioChunkInit.timestamp, EncodedAudioChunkInit.transfer, EncodedAudioChunkInit.type; see also WebIDLPedia
EncodedAudioChunkMetadata (WebIDL dictionary) §: Defined in WebCodecs; Related terms: EncodedAudioChunkMetadata.decoderConfig; see also WebIDLPedia
EncodedAudioChunkOutputCallback (WebIDL callback) §: Defined in WebCodecs
EncodedAudioChunkType (WebIDL enumeration) §: Defined in WebCodecs; Related terms: value delta, value key; see also WebIDLPedia
PerformanceResourceTiming.encodedBodySize (WebIDL attribute) §: Defined in Resource Timing
EncodedVideoChunk (WebIDL interface) §: Defined in WebCodecs; Referenced in AV1 WebCodecs Registration, H.264, WebCodecs Codec Registry, H.265, VP8 WebCodecs Registration, VP9 WebCodecs Registration; Related terms: EncodedVideoChunk.[[byte length]], EncodedVideoChunk.byteLength, undefined[[duration]], EncodedVideoChunk.[[internal data]], undefined[[timestamp]], undefined[[type]], new EncodedVideoChunk(init), EncodedVideoChunk.copyTo(destination); see also WebIDLPedia
new EncodedVideoChunk(init) (WebIDL constructor) §: Defined in WebCodecs
EncodedVideoChunkInit (WebIDL dictionary) §: Defined in WebCodecs; Related terms: EncodedVideoChunkInit.data, EncodedVideoChunkInit.duration, EncodedVideoChunkInit.timestamp, EncodedVideoChunkInit.transfer, EncodedVideoChunkInit.type; see also WebIDLPedia
EncodedVideoChunkMetadata (WebIDL dictionary) §: Defined in WebCodecs; Related terms: EncodedVideoChunkMetadata.alphaSideData, EncodedVideoChunkMetadata.decoderConfig, EncodedVideoChunkMetadata.svc; see also WebIDLPedia
EncodedVideoChunkOutputCallback (WebIDL callback) §: Defined in WebCodecs
EncodedVideoChunkType (WebIDL enumeration) §: Defined in WebCodecs; Related terms: value delta, value key; see also WebIDLPedia
TextEncoder.encodeInto(source, destination) (WebIDL operation) §: Defined in Encoding
AudioEncoder.[[encodeQueueSize]] (internal slot) §
AudioEncoder.[[encodeQueueSize]] (internal slot) §: Defined in WebCodecs , WebCodecs
VideoEncoder.[[encodeQueueSize]] (internal slot) §
VideoEncoder.[[encodeQueueSize]] (internal slot) §: Defined in WebCodecs , WebCodecs
Encoder bind groups alias a writable resource (algorithm) §: Defined in WebGPU
RTCOutboundRtpStreamStats.encoderImplementation (WebIDL dictionary member) §: Defined in WebRTC Statistics
globalThis.encodeURI(uri) (WebIDL operation) §: Defined in ECMAScript
globalThis.%encodeURI%() (WebIDL operation) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports
globalThis.encodeURIComponent(uriComponent) (WebIDL operation) §: Defined in ECMAScript
globalThis.%encodeURIComponent%() (WebIDL operation) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports, URL
encoding (concept for Document ) §: Defined in DOM; Referenced in HTML, CSSOM, XMLHttpRequest
encoding (concept) §: Defined in Encoding; Referenced in DOM, Fetch, HTML, URL; Related terms: concept label, concept name
encoding (markup attribute for annotation, annotation-xml element ) §: Defined in MathML Core
HTMLFormElement.encoding (WebIDL attribute) §: Defined in HTML
NDEFRecord.encoding (WebIDL attribute) §: Defined in Web NFC API
NDEFRecordInit.encoding (WebIDL dictionary member) §: Defined in Web NFC API
TextDecoderCommon.encoding (WebIDL attribute) §: Defined in Encoding
TextEncoderCommon.encoding (WebIDL attribute) §: Defined in Encoding
encoding-parse a URL (concept) §: Defined in HTML; Referenced in XMLHttpRequest
EncodingError (exception) §: Defined in Web IDL; Referenced in HTML, Web Audio API, Web Authentication, WebCodecs
MediaCapabilities.encodingInfo(configuration) (WebIDL operation) §: Defined in Media Capabilities
RTCRtpSendParameters.encodings (WebIDL dictionary member) §: Defined in WebRTC 1.0
"encrypt" (value for KeyUsage WebIDL enumeration) §: Defined in Web Cryptography API
"encrypt" (value for SFrameTransformRole WebIDL enumeration) §: Defined in WebRTC Encoded Transform
SubtleCrypto.encrypt() (WebIDL operation) §: Defined in Web Cryptography API
RTCRtpHeaderExtensionParameters.encrypted (WebIDL dictionary member) §: Defined in WebRTC 1.0
Encrypted Block Encountered (concept) §: Defined in Encrypted Media Extensions
EncryptedData (markup element) §: Defined in EPUB 3.3
EncryptedKey (markup element) §: Defined in EPUB 3.3
encryption (markup element) §: Defined in EPUB 3.3
KeySystemTrackConfiguration.encryptionScheme (WebIDL dictionary member) §: Defined in Media Capabilities
MediaKeySystemMediaCapability.encryptionScheme (WebIDL dictionary member) §: Defined in Encrypted Media Extensions; Referenced in Media Capabilities
enctype (markup attribute for button, form element ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0; Related terms: value application/x-www-form-urlencoded, value application/x-www-form-urlencoded, value multipart/form-data, value multipart/form-data, value text/plain, value text/plain
HTMLFormElement.enctype (WebIDL attribute) §: Defined in HTML
end (concept for range ) §: Defined in DOM; Referenced in HTML, URL Fragment Text Directives, Selection API
end (CSS value for steps() ) §: Defined in CSS Easing Functions 2 , CSS Easing Functions 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
end (CSS value for scroll-start, scroll-start-block property, scroll-start-inline property, scroll-start-x property, scroll-start-y property ) §: Defined in CSS Scroll Snap 2
"end" (value for SelectionMode WebIDL enumeration) §: Defined in HTML
"end" (value for CanvasTextAlign WebIDL enumeration) §: Defined in HTML
end (markup attribute for animate ) §: Defined in SVG Animations 2; Referenced in SVG 2
end (event for SpeechRecognition ) §: Defined in Web Speech API
end (event for SpeechSynthesisUtterance ) §: Defined in Web Speech API
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 Grid Layout 3, CSS Snapshot 2022, CSS Snapshot 2023, CSS Anchor Positioning, CSS Inline Layout 3
end (CSS value for <inset-area>, inset-area property ) §: Defined in CSS Anchor Positioning
end (CSS value for anchor() ) §: Defined in CSS Anchor Positioning
end (CSS value for text-box-trim ) §: Defined in CSS Inline Layout 3
end (CSS value for block-step-align ) §: Defined in CSS Rhythmic Sizing
end (CSS value for scroll-snap-align ) §: Defined in CSS Scroll Snap 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
end (CSS value for text-align ) §: Defined in CSS Text 3 , CSS Text 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, WebVTT: The Web Video Text Tracks Format
end (CSS value for text-group-align ) §: Defined in CSS Text 4
end (CSS value for text-decoration-skip-spaces ) §: Defined in CSS Text Decoration 4
end (concept for CSS ) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4; Referenced in CSS Borders and Box Decorations 4, CSS Grid Layout 3, CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Anchor Positioning, CSS Flexbox 1, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Logical Properties 1, CSS Overflow 3, CSS Overflow 4, CSS Positioned Layout 3, CSS Rhythmic Sizing, CSS Text 3, CSS Text 4, CSS Text Decoration 4, Scroll-driven Animations, WebXR Layers API 1
end (CSS value for wrap-flow ) §: Defined in CSS Exclusions 1
"end" (value for ScrollLogicalPosition WebIDL enumeration) §: Defined in CSSOM View
"end" (value for LineAlignSetting WebIDL enumeration) §: Defined in WebVTT: The Web Video Text Tracks Format
"end" (value for AlignSetting WebIDL enumeration) §: Defined in WebVTT: The Web Video Text Tracks Format
end (event for XRSession ) §: Defined in WebXR Device API
CSSScopeRule.end (WebIDL attribute) §: Defined in CSS Cascading 6
PerformanceMeasureOptions.end (WebIDL dictionary member) §: Defined in User Timing
end condition (concept for prescan a byte stream to determine its encoding ) §: Defined in HTML
end node (concept for range ) §: Defined in DOM; Referenced in URL Fragment Text Directives, CSS Custom Highlight API 1, Selection API
end of iteration (concept) §: Defined in Web IDL; Referenced in Streams
end offset (concept for range ) §: Defined in DOM; Referenced in URL Fragment Text Directives, Selection API
end time (concept for fetch timing info ) §: Defined in Fetch; Referenced in HTML, WebDriver BiDi, Resource Timing
end time (concept for transition ) §: Defined in CSS Transitions; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
end time (concept) §: Defined in Performance Timeline
end value (concept for transition ) §: Defined in CSS Transitions; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Range.END_TO_END (WebIDL constant) §: Defined in DOM
Range.END_TO_START (WebIDL constant) §: Defined in DOM
End-of-queue (concept) §: Defined in Encoding; Referenced in Web NFC API
GPUComputePassEncoder.end() (WebIDL operation) §: Defined in WebGPU
GPURenderPassEncoder.end() (WebIDL operation) §: Defined in WebGPU
XRSession.end() (WebIDL operation) §: Defined in WebXR Device API
TimeRanges.end(index) (WebIDL operation) §: Defined in HTML
AbstractRange.endContainer (WebIDL attribute) §: Defined in DOM
StaticRangeInit.endContainer (WebIDL dictionary member) §: Defined in DOM
EffectTiming.endDelay (WebIDL dictionary member) §
EffectTiming.endDelay (WebIDL dictionary member) §: Defined in Web Animations , Web Animations 2
OptionalEffectTiming.endDelay (WebIDL dictionary member) §
OptionalEffectTiming.endDelay (WebIDL dictionary member) §: Defined in Web Animations , Web Animations 2
ended (event for HTMLMediaElement ) §: Defined in HTML
"ended" (value for ReadyState WebIDL enumeration) §: Defined in Media Source Extensions™
ended (concept for track ) §: Defined in Media Capture and Streams; Referenced in WebXR Anchors
"ended" (value for MediaStreamTrackState WebIDL enumeration) §: Defined in Media Capture and Streams; Referenced in MediaStream Recording
ended (event) §: Defined in Media Capture and Streams
ended (event for AudioScheduledSourceNode ) §: Defined in Web Audio API
HTMLMediaElement.ended (WebIDL attribute) §: Defined in HTML; Referenced in Open Screen Protocol
BlobPropertyBag.endings (WebIDL dictionary member) §: Defined in File API
EndingType (WebIDL enumeration) §: Defined in File API; Related terms: value native, value transparent; see also WebIDLPedia
GPURenderPassEncoder.endOcclusionQuery() (WebIDL operation) §: Defined in WebGPU
AbstractRange.endOffset (WebIDL attribute) §: Defined in DOM
StaticRangeInit.endOffset (WebIDL dictionary member) §: Defined in DOM
ViewTimeline.endOffset (WebIDL attribute) §: Defined in Scroll-driven Animations
GPUComputePassTimestampWrites.endOfPassWriteIndex (WebIDL dictionary member) §: Defined in WebGPU
GPURenderPassTimestampWrites.endOfPassWriteIndex (WebIDL dictionary member) §: Defined in WebGPU
MediaSource.endOfStream() (WebIDL operation) §: Defined in Media Source Extensions™
EndOfStreamError (WebIDL enumeration) §: Defined in Media Source Extensions™; Related terms: value decode, value network; see also WebIDLPedia
"endpoint" (value for USBRecipient WebIDL enumeration) §: Defined in WebUSB API
endpoint (concept) §: Defined in Reporting API; Referenced in Network Reporting API, Crash Reporting, Deprecation Reporting, Document Policy, Intervention Reporting; Related terms: endpoint.failures, endpoint.name, endpoint.url
PushSubscription.endpoint (WebIDL attribute) §: Defined in Push API
PushSubscriptionJSON.endpoint (WebIDL dictionary member) §: Defined in Push API
endpoint group (concept) §: Defined in Network Reporting API; Referenced in Network Error Logging; Related terms: endpoint group.creation, endpoint group.endpoints, endpoint group.name, endpoint group.subdomains, endpoint group.ttl
endpoint pair (concept) §: Defined in Streams
client.endpoint-groups (WebIDL attribute) §: Defined in Network Reporting API
endpoint-on-the-path (concept) §: Defined in SVG 2
USBEndpoint.[[endpointAddress]] (internal slot) §: Defined in WebUSB API
USBEndpoint.endpointNumber (WebIDL attribute) §: Defined in WebUSB API; Related terms: new endpointNumber(alternate, endpointNumber, direction)
new endpointNumber(alternate, endpointNumber, direction) (WebIDL constructor) §: Defined in WebUSB API
USBAlternateInterface.[[endpoints]] (internal slot) §
USBAlternateInterface.[[endpoints]] (internal slot) §: Defined in WebUSB API , WebUSB API
endpoints (concept for network_reporting_endpoints ) §: Defined in Network Reporting API
endpoints (concept for WindowOrWorkerGlobalScope ) §: Defined in Reporting API
endpoint group.endpoints (WebIDL attribute) §: Defined in Network Reporting API
ends with (concept for string ) §: Defined in Infra; Referenced in HTML, URL, Fenced Frame, URL Fragment Text Directives, Web Serial API, Protected Audience, Content Security Policy 3
endstreaming (event) §: Defined in Media Source Extensions™
String.endsWith(searchString, endPosition) (WebIDL operation) §: Defined in ECMAScript
ComputedEffectTiming.endTime (WebIDL dictionary member) §
ComputedEffectTiming.endTime (WebIDL dictionary member) §: Defined in Web Animations , Web Animations 2
TextTrackCue.endTime (WebIDL attribute) §: Defined in HTML
GPUComputePassEncoder.[[endTimestampWrite]] (internal slot) §: Defined in WebGPU
GPURenderPassEncoder.[[endTimestampWrite]] (internal slot) §: Defined in WebGPU
"enforce" (value for SecurityPolicyViolationEventDisposition WebIDL enumeration) §: Defined in Content Security Policy 3
AuthenticationExtensionsClientInputs.enforceCredentialProtectionPolicy (WebIDL dictionary member) §: Defined in CTAP
enforced (concept for scripting policy pair ) §: Defined in Scripting Policy; Referenced in Service Workers
enforced (concept) §: Defined in Content Security Policy 3; Referenced in HTML
EnforceRange (WebIDL extended attribute) §: Defined in Web IDL; Referenced in DOM, File System, Topics API, Streams, WebAssembly JavaScript Interface: Content Security Policy, WebAssembly JavaScript Interface: Exception Handling, WebAssembly JavaScript Interface: Promise Integration, WebAssembly JavaScript Interface: Type Reflection, Web Bluetooth, Digital Goods API, Direct Sockets API, Document Picture-in-Picture, Idle Detection API, Prioritized Task Scheduling, Web Serial API, Web Smart Card API, WebHID API, Badging API, Compute Pressure 1, Indexed DB 3.0, MediaStreamTrack Insertable Media Processing using Streams, WebAssembly JavaScript Interface, Web Animations, FLAC WebCodecs Registration, Opus WebCodecs Registration, WebCodecs, Web Cryptography API, WebGPU, Web Neural Network API, WebRTC Encoded Transform, WebRTC 1.0, WebTransport
"english-linear" (value for HIDUnitSystem WebIDL enumeration) §: Defined in WebHID API
"english-rotation" (value for HIDUnitSystem WebIDL enumeration) §: Defined in WebHID API
enqueue (concept for queue ) §: Defined in Infra; Referenced in DOM, HTML, Navigational-Tracking Mitigations, Shared Storage API, MediaStreamTrack Insertable Media Processing using Streams, Service Workers, Web Locks API, WebCodecs, Web Neural Network API, WebTransport
enqueue (concept for ReadableStream ) §: Defined in Streams; Referenced in Fetch, Background Fetch, Direct Sockets API, Web Serial API, Loading Signed Exchanges, File API, MediaStreamTrack Insertable Media Processing using Streams, Service Workers, WebRTC Encoded Transform, WebTransport
enqueue (concept for TransformStream ) §: Defined in Streams; Referenced in Encoding, Fetch, Compression Streams
Enqueue a command (algorithm) §: Defined in WebGPU
enqueue a custom element callback reaction (concept) §: Defined in HTML; Referenced in DOM
enqueue a custom element upgrade reaction (concept) §: Defined in HTML; Referenced in DOM
Enqueue a render command (algorithm) §: Defined in WebGPU
enqueue steps (concept for parallel queue ) §: Defined in HTML; Referenced in Fetch, File System, Web Bluetooth, Background Fetch, Content Index, Keyboard Lock, Web Periodic Background Synchronization, Shared Storage API, Storage Buckets API, Protected Audience, Web Locks API
ReadableByteStreamController.enqueue(chunk) (WebIDL operation) §: Defined in Streams
ReadableStreamDefaultController.enqueue(chunk) (WebIDL operation) §: Defined in Streams
TransformStreamDefaultController.enqueue(chunk) (WebIDL operation) §: Defined in Streams
EnqueueAtomicsWaitAsyncTimeoutJob (algorithm) §: Defined in ECMAScript
EnqueueResolveInAgentJob (algorithm) §: Defined in ECMAScript
EnqueueValueWithSize (algorithm) §: Defined in Streams
ensure pre-insertion validity (concept for Node ) §: Defined in DOM
EnsureCSPDoesNotBlockStringCompilation(realm, source) (concept) §: Defined in Content Security Policy 3; Referenced in HTML, Scripting Policy, Trusted Types
EnsureScriptingPolicyDoesNotBlockScriptExecution(callerRealm, calleeRealm, source) (algorithm) §: Defined in Scripting Policy
enter (event for TextTrackCue ) §: Defined in HTML
enter (value for enterkeyhint attribute of html-global ) §: Defined in HTML
enter (event for DocumentPictureInPicture ) §: Defined in Document Picture-in-Picture
EnterCriticalSection (algorithm) §: Defined in ECMAScript
enterkeyhint (markup attribute for html-global ) §: Defined in HTML; Referenced in HTML Accessibility API Mappings 1.0; Related terms: value done, value enter, value go, value next, value previous, value search, value send
ElementContentEditable.enterKeyHint (WebIDL attribute) §: Defined in HTML
"enterpictureinpicture" (value for MediaSessionAction WebIDL enumeration) §: Defined in Media Session
enterpictureinpicture (event for HTMLVideoElement ) §: Defined in Picture-in-Picture
"enterprise" (value for AttestationConveyancePreference WebIDL enumeration) §: Defined in Web Authentication
DocumentType.entities (WebIDL attribute) §: Defined in DOM
Entity (WebIDL interface) §: Defined in DOM; see also WebIDLPedia
Node.ENTITY_NODE (WebIDL constant) §: Defined in DOM
Node.ENTITY_REFERENCE_NODE (WebIDL constant) §: Defined in DOM
EntityReference (WebIDL interface) §: Defined in DOM; see also WebIDLPedia
XRHitTestOptionsInit.entityTypes (WebIDL dictionary member) §: Defined in WebXR Hit Test
XRTransientInputHitTestOptionsInit.entityTypes (WebIDL dictionary member) §: Defined in WebXR Hit Test
GPUBindGroup.[[entries]] (internal slot) §: Defined in WebGPU
GPUBindGroupDescriptor.entries (WebIDL dictionary member) §: Defined in WebGPU
GPUBindGroupLayoutDescriptor.entries (WebIDL dictionary member) §: Defined in WebGPU
%TypedArray%.entries() (WebIDL operation) §: Defined in ECMAScript
Array.entries() (WebIDL operation) §: Defined in ECMAScript; Referenced in Web IDL
Map.entries() (WebIDL operation) §: Defined in ECMAScript
Navigation.entries() (WebIDL operation) §: Defined in HTML
entries() (WebIDL operation for Set ) §: Defined in ECMAScript
Object.entries(O) (WebIDL operation) §: Defined in ECMAScript
entry (concept for entry list ) §: Defined in HTML; Referenced in Fetch, XMLHttpRequest; Related terms: concept name, concept value
entry (concept for map ) §: Defined in Infra; Referenced in HTML, Web IDL, Attribution Reporting, Private Network Access, Shared Storage API, Accelerometer, Ambient Light Sensor, Audiobooks, CSS Typed OM 1, Generic Sensor API, Geolocation Sensor, Gyroscope, JSON-LD 1.1 Processing Algorithms and API, JSON-LD 1.1 Framing, JSON-LD 1.1, Magnetometer, DeviceOrientation Event, Orientation Sensor, Proximity Sensor, Publication Manifest, RDF Dataset Canonicalization, Service Workers, Web Authentication, WebDriver
entry (CSS value for animation-timeline-range ) §: Defined in Scroll-driven Animations
NavigationActivation.entry (WebIDL attribute) §: Defined in HTML
entry list (concept) §: Defined in HTML; Referenced in XMLHttpRequest; Related terms: concept create an entry, concept entry
entry list (concept for FormData ) §: Defined in XMLHttpRequest; Referenced in Fetch, HTML
entry-crossing (CSS value for animation-timeline-range ) §: Defined in Scroll-driven Animations
GPUBindGroupLayout.[[entryMap]] (internal slot) §: Defined in WebGPU
GPUProgrammableStage.entryPoint (WebIDL dictionary member) §: Defined in WebGPU
GPUShaderModuleCompilationHint.entryPoint (WebIDL dictionary member) §: Defined in WebGPU
PerformanceEntry.entryType (WebIDL attribute) §: Defined in Performance Timeline; Referenced in HTML, Element Timing API, Layout Instability, Soft Navigations, Event Timing API, Largest Contentful Paint, Long Tasks API, Paint Timing
PerformanceLongAnimationFrameTiming.entryType (WebIDL attribute) §: Defined in Long Animation Frames API
PerformanceLongTaskTiming.entryType (WebIDL attribute) §: Defined in Long Tasks API
PerformanceScriptTiming.entryType (WebIDL attribute) §: Defined in Long Animation Frames API
TaskAttributionTiming.entryType (WebIDL attribute) §: Defined in Long Tasks API
PerformanceObserverInit.entryTypes (WebIDL dictionary member) §: Defined in Performance Timeline
EnumerableOwnProperties (algorithm) §: Defined in ECMAScript; Referenced in HTML, Import Attributes, JSON.parse source text access
enumerated attribute (concept) §: Defined in HTML; Referenced in HTML Media Capture, VirtualKeyboard API, WAI-ARIA, WAI-ARIA, WebDriver
MediaDevices.enumerateDevices() (WebIDL operation) §: Defined in Media Capture and Streams; Referenced in Prerendering Revamped, Web Audio API
EnumerateObjectProperties (algorithm) §: Defined in ECMAScript
enumeration (concept) §: Defined in Web IDL; Referenced in Permissions
Enumeration types (concept) §: Defined in Web IDL
enumeration value (concept) §: Defined in Web IDL; Referenced in Web Authentication
Enums (concept for ECMAScript ) §: Defined in ECMAScript
env() (CSS function) §: Defined in CSS Environment Variables 1; Referenced in CSS Anchor Positioning, CSS Fonts 4; Related terms: CSS value safe-area-inset-bottom, CSS value safe-area-inset-left, CSS value safe-area-inset-right, CSS value safe-area-inset-top, CSS value viewport-segment-bottom, CSS value viewport-segment-height, CSS value viewport-segment-left, CSS value viewport-segment-right, CSS value viewport-segment-top, CSS value viewport-segment-width
enveloping proof (concept) §: Defined in Verifiable Credentials Data Model v2.0
environment (concept) §: Defined in HTML; Referenced in Fetch, Navigational-Tracking Mitigations, Storage, Prefetch, Shared Storage API, Service Workers; Related terms: concept active service worker, concept creation URL, concept execution ready flag, concept id, concept partition nonce, concept target browsing context, concept top-level creation URL, concept top-level origin
environment (concept for blob URL entry ) §: Defined in File API; Referenced in HTML, URL
"environment" (value for VideoFacingModeEnum WebIDL enumeration) §: Defined in Media Capture and Streams
environment discarding steps (concept) §: Defined in HTML; Referenced in Prefetch, Portals, Service Workers
environment encoding (concept) §: Defined in CSS Syntax 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSSOM
Environment Record (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in Source Phase Imports
environment settings object (concept) §: Defined in HTML; Referenced in Federated Credential Management API, Fetch, Notifications API, Topics API, Navigational-Tracking Mitigations, requestStorageAccessFor API, The Storage Access API, Storage, URL Pattern, Long Animation Frames API, Network Reporting API, Web NFC API, WebDriver BiDi, Web Bluetooth, Iframe credentialless, Attribution Reporting, Background Fetch, Client Hints Infrastructure, Content Index, Scripting Policy, Document Policy, File System Access, User Agent Interaction with Related Website Sets, Manifest Incubations, Prefetch, Page Lifecycle, Measure Memory API, Requesting Permissions, Private Network Access, Shared Storage API, Storage Buckets API, WebOTP API, Loading Signed Exchanges, Credential Management 1, Content Security Policy 3, File API, High Resolution Time, Mixed Content, Payment Method Manifest, Permissions Policy, Permissions, Referrer Policy, Reporting API, Service Workers, Upgrade Insecure Requests, Web Locks API, Web Authentication; Related terms: concept API base URL, concept cross-origin isolated capability, concept current monotonic time, concept current relative timestamp, concept current wall time, concept global object, concept module map, concept origin, concept policy container, concept realm, concept realm execution context, concept responsible event loop, concept time origin
environment-blending (CSS descriptor for @media ) §: Defined in Media Queries 5; Related terms: CSS value additive, CSS value opaque, CSS value subtractive
XRSession.environmentBlendMode (WebIDL attribute) §: Defined in WebXR Augmented Reality 1
EOF code point (concept) §: Defined in CSS Syntax 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
<eof-token> (CSS type) §: Defined in CSS Syntax 3
epoch (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in Temporal
EpochTimeStamp (WebIDL type alias) §: Defined in High Resolution Time; Referenced in Notifications API; see also WebIDLPedia
Number.EPSILON (WebIDL constant) §: Defined in ECMAScript
MLBatchNormalizationOptions.epsilon (WebIDL dictionary member) §: Defined in Web Neural Network API
MLInstanceNormalizationOptions.epsilon (WebIDL dictionary member) §: Defined in Web Neural Network API
MLLayerNormalizationOptions.epsilon (WebIDL dictionary member) §: Defined in Web Neural Network API
EPUB conformance checker (concept) §: Defined in EPUB 3.3
EPUB container (concept) §: Defined in EPUB 3.3
EPUB content document (concept) §: Defined in EPUB 3.3
EPUB creator (concept) §: Defined in EPUB 3.3
EPUB manifest (concept) §: Defined in EPUB 3.3
EPUB navigation document (concept) §: Defined in EPUB 3.3
EPUB publication (concept) §: Defined in EPUB 3.3
EPUB reading system (concept) §: Defined in EPUB 3.3
EPUB spine (concept) §: Defined in EPUB 3.3
epub:type (markup attribute) §: Defined in EPUB 3.3
epubReadingSystem (concept) §: Defined in EPUB Reading Systems 3.3
Navigator.epubReadingSystem (WebIDL attribute) §: Defined in EPUB Reading Systems 3.3
EpubReadingSystem (WebIDL interface) §: Defined in EPUB Reading Systems 3.3; Related terms: EpubReadingSystem.hasFeature(); see also WebIDLPedia
equal (concept for boundary point ) §: Defined in DOM
equal (concept for storage key ) §: Defined in Storage; Referenced in HTML, Service Workers
equal (concept for host ) §: Defined in URL; Referenced in HTML, Navigational-Tracking Mitigations
equal (concept for url ) §: Defined in URL; Referenced in HTML, Cookie Store API, Loading Signed Exchanges, Web Application Manifest, Payment Method Identifiers, Service Workers
"equal" (value for GPUCompareFunction WebIDL enumeration) §: Defined in WebGPU
equal numeric value (concept) §: Defined in CSS Typed OM 1
MLGraphBuilder.equal(a, b) (WebIDL operation) §: Defined in Web Neural Network API
"equalpower" (value for PanningModelType WebIDL enumeration) §: Defined in Web Audio API
equals (concept for Node ) §: Defined in DOM; Referenced in Soft Navigations; Related terms: concept exclude fragments
CSSNumericValue.equals(...value) (WebIDL operation) §: Defined in CSS Typed OM 1
equivalence class (concept for user agent ) §: Defined in User-Agent Client Hints
equivalent modulo search variance (concept) §: Defined in No-Vary-Search
equivalent path (concept for <basic-shape> ) §: Defined in Motion Path 1
equivalent path (concept for rect() ) §: Defined in Motion Path 1
equivalent path (concept for inset() ) §: Defined in Motion Path 1
equivalent path (concept for xywh() ) §: Defined in Motion Path 1
equivalent token sequence (concept) §: Defined in CSS Properties and Values API 1
MLGraphBuilder.erf(input) (WebIDL operation) §: Defined in Web Neural Network API
erratum (concept) §: Defined in W3C Process Document
"error" (value for RequestRedirect WebIDL enumeration) §: Defined in Fetch
"error" (value for ResponseType WebIDL enumeration) §: Defined in Fetch
error (event for HTMLMediaElement ) §: Defined in HTML
error (event for HTMLSourceElement ) §: Defined in HTML
error (event for HTMLTrackElement ) §: Defined in HTML
error (event for AbstractWorker, EventSource interface, HTMLElement interface, SharedWorker interface, Window interface, Worker interface, WorkerGlobalScope interface ) §: Defined in HTML; Referenced in Speculation Rules, Loading Signed Exchanges
error (concept for ReadableStream ) §: Defined in Streams; Referenced in Fetch, Background Fetch, Direct Sockets API, Web Serial API, Loading Signed Exchanges, File API, Service Workers, WebTransport
error (concept for WritableStream ) §: Defined in Streams; Referenced in WebTransport
error (concept for TransformStream ) §: Defined in Streams
error (event for WebSocket ) §: Defined in WebSockets
error (event for SpeechRecognition ) §: Defined in Web Speech API
error (event for SpeechSynthesisUtterance ) §: Defined in Web Speech API
"error" (value for FontFaceLoadStatus WebIDL enumeration) §: Defined in CSS Font Loading 3
error (event for FileReader ) §: Defined in File API
error (event for IDBRequest ) §: Defined in Indexed DB 3.0
error (event) §: Defined in Media Source Extensions™
error (event for MediaRecorder ) §: Defined in MediaStream Recording
error (concept for Document ) §: Defined in MiniApp Lifecycle
"error" (value for GlobalState WebIDL enumeration) §: Defined in MiniApp Lifecycle
"error" (value for PresentationConnectionCloseReason WebIDL enumeration) §: Defined in Presentation API
error (concept) §: Defined in WebDriver; Referenced in Federated Credential Management API, Navigational-Tracking Mitigations, Attribution Reporting, Generic Sensor API, Reporting API, Secure Payment Confirmation, Web Authentication
"error" (value for GPUCompilationMessageType WebIDL enumeration) §: Defined in WebGPU
error (event for RTCDataChannel ) §: Defined in WebRTC 1.0
error (event for RTCDtlsTransport ) §: Defined in WebRTC 1.0
error (event for XMLHttpRequest ) §: Defined in XMLHttpRequest
AudioDecoderInit.error (WebIDL dictionary member) §: Defined in WebCodecs
AudioEncoderInit.error (WebIDL dictionary member) §: Defined in WebCodecs
ErrorEvent.error (WebIDL attribute) §: Defined in HTML
FileReader.error (WebIDL attribute) §: Defined in File API
GPUUncapturedErrorEvent.error (WebIDL attribute) §: Defined in WebGPU
GPUUncapturedErrorEventInit.error (WebIDL dictionary member) §: Defined in WebGPU
HTMLMediaElement.error (WebIDL attribute) §: Defined in HTML; Referenced in Open Screen Protocol
IDBRequest.error (WebIDL attribute) §: Defined in Indexed DB 3.0
IDBTransaction.error (WebIDL attribute) §: Defined in Indexed DB 3.0
PaymentRequestDetailsUpdate.error (WebIDL dictionary member) §: Defined in Payment Handler API
PaymentValidationErrors.error (WebIDL dictionary member) §: Defined in Payment Request API 1.1
RTCErrorEvent.error (WebIDL attribute) §: Defined in WebRTC 1.0
RTCErrorEventInit.error (WebIDL dictionary member) §: Defined in WebRTC 1.0
SensorErrorEvent.error (WebIDL attribute) §: Defined in Generic Sensor API
SensorErrorEventInit.error (WebIDL dictionary member) §: Defined in Generic Sensor API
SpeechRecognitionErrorEvent.error (WebIDL attribute) §: Defined in Web Speech API
SpeechRecognitionErrorEventInit.error (WebIDL dictionary member) §: Defined in Web Speech API
SpeechSynthesisErrorEvent.error (WebIDL attribute) §: Defined in Web Speech API
SpeechSynthesisErrorEventInit.error (WebIDL dictionary member) §: Defined in Web Speech API
VideoDecoderInit.error (WebIDL dictionary member) §: Defined in WebCodecs
VideoEncoderInit.error (WebIDL dictionary member) §: Defined in WebCodecs
HTMLTrackElement.ERROR (WebIDL constant) §: Defined in HTML
Error (exception) §: Defined in ECMAScript; Referenced in Web IDL, Web IDL, Writing Promise-Using Specifications; Related terms: Error.message, Error.name, new Error(message, options), Error.toString()
AudioDecoder.[[error callback]] (internal slot) §: Defined in WebCodecs
AudioEncoder.[[error callback]] (internal slot) §: Defined in WebCodecs
VideoDecoder.[[error callback]] (internal slot) §: Defined in WebCodecs
VideoEncoder.[[error callback]] (internal slot) §: Defined in WebCodecs
error code (concept) §: Defined in WebDriver; Referenced in Federated Credential Management API, HTML, Navigational-Tracking Mitigations, WebDriver BiDi, Web Bluetooth, Attribution Reporting, Background Fetch, Generic Sensor API, Reporting API, Secure Payment Confirmation, Web Authentication
error steps (concept for read request ) §: Defined in Streams; Referenced in Fetch, Service Workers, WebCodecs
error steps (concept for read-into request ) §: Defined in Streams
error to rethrow (concept for script ) §: Defined in HTML
%Error.prototype% (WebIDL interface) §: Defined in ECMAScript; Referenced in HTML, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Web IDL; see also WebIDLPedia
console.error(...data) (WebIDL operation) §: Defined in Console
Response.error() (WebIDL operation) §: Defined in Fetch
ReadableByteStreamController.error(e) (WebIDL operation) §: Defined in Streams
ReadableStreamDefaultController.error(e) (WebIDL operation) §: Defined in Streams
WritableStreamDefaultController.error(e) (WebIDL operation) §: Defined in Streams
new Error(message, options) (WebIDL constructor) §: Defined in ECMAScript
TransformStreamDefaultController.error(reason) (WebIDL operation) §: Defined in Streams
%Error% (exception) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports
ErrorCallback (WebIDL callback) §: Defined in File and Directory Entries API
RTCPeerConnectionIceErrorEvent.errorCode (WebIDL attribute) §: Defined in WebRTC 1.0
RTCPeerConnectionIceErrorEventInit.errorCode (WebIDL dictionary member) §: Defined in WebRTC 1.0
LifecycleError.errorDescription (WebIDL attribute) §: Defined in MiniApp Lifecycle
RTCError.errorDetail (WebIDL attribute) §: Defined in WebRTC 1.0
RTCErrorInit.errorDetail (WebIDL dictionary member) §: Defined in WebRTC 1.0
errored (concept for ReadableStream ) §: Defined in Streams; Referenced in Fetch, Background Fetch, Loading Signed Exchanges, Service Workers
ErrorEvent (WebIDL interface) §: Defined in HTML; Referenced in MediaStream Recording, Resize Observer, Web Audio API; Related terms: ErrorEvent.colno, ErrorEvent.error, ErrorEvent.filename, ErrorEvent.lineno, ErrorEvent.message; see also WebIDLPedia
ErrorEventInit (WebIDL dictionary) §: Defined in HTML; see also WebIDLPedia
[[errors]] (internal slot for GPU error scope ) §: Defined in WebGPU; Related terms: concept no such handle, concept no such history entry, concept no such intercept, concept no such node, concept no such request, concept no such script, concept no such storage partition, concept no such user context, concept unable to close browser, concept unable to set cookie, concept unable to set file input, concept underspecified storage partition
GPUDevice.[[errorScopeStack]] (internal slot) §: Defined in WebGPU
[[ErrorSteps]] (algorithm for WritableStreamDefaultController ) §: Defined in Streams
[[ErrorSteps]] (algorithm for WritableStreamController ) §: Defined in Streams
RTCPeerConnectionIceErrorEvent.errorText (WebIDL attribute) §: Defined in WebRTC 1.0
RTCPeerConnectionIceErrorEventInit.errorText (WebIDL dictionary member) §: Defined in WebRTC 1.0
SFrameTransformErrorEvent.errorType (WebIDL attribute) §: Defined in WebRTC Encoded Transform
SFrameTransformErrorEventInit.errorType (WebIDL dictionary member) §: Defined in WebRTC Encoded Transform
escape a character (concept) §: Defined in CSSOM
CSS.escape(ident) (WebIDL operation) §: Defined in CSSOM
globalThis.escape(string) (WebIDL operation) §: Defined in ECMAScript
EscapeRegExpPattern (algorithm) §: Defined in ECMAScript
essence (concept for MIME type ) §: Defined in MIME Sniffing; Referenced in Fetch, HTML, WebDriver BiDi, File System Access, Speculation Rules, URL Fragment Text Directives, Loading Signed Exchanges, Clipboard API and events, Image Resource
establish an independent formatting context (concept) §: Defined in CSS Display 4 , CSS Display 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Box Alignment 3, CSS Containment 2, CSS Flexbox 1, CSS Grid Layout 1, CSS Grid Layout 2, CSS Overflow 3, CSS Overflow 4, CSS Positioned Layout 3, CSS Rhythmic Sizing
establish an orthogonal flow (concept) §: Defined in CSS Writing Modes 3 , CSS Writing Modes 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Grid Layout 1, CSS Grid Layout 2
SmartCardResourceManager.establishContext() (WebIDL operation) §: Defined in Web Smart Card API
StorageBucket.estimate() (WebIDL operation) §: Defined in Storage Buckets API
StorageManager.estimate() (WebIDL operation) §: Defined in Storage
RTCInboundRtpStreamStats.estimatedPlayoutTimestamp (WebIDL dictionary member) §: Defined in WebRTC Statistics
WebTransportConnectionStats.estimatedSendRate (WebIDL dictionary member) §: Defined in WebTransport
"etc2-rgb8a1unorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"etc2-rgb8a1unorm-srgb" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"etc2-rgb8unorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"etc2-rgb8unorm-srgb" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"etc2-rgba8unorm" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"etc2-rgba8unorm-srgb" (value for GPUTextureFormat WebIDL enumeration) §: Defined in WebGPU
"ethernet" (value for ConnectionType WebIDL enumeration) §: Defined in Network Information API
ethiopic-numeric (CSS value for <counter-style-name> ) §: Defined in CSS Counter Styles 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
EUC-JP (concept) §: Defined in Encoding
EUC-JP decoder (concept) §: Defined in Encoding
EUC-JP encoder (concept) §: Defined in Encoding
EUC-KR (concept) §: Defined in Encoding; Referenced in HTML
EUC-KR decoder (concept) §: Defined in Encoding
EUC-KR encoder (concept) §: Defined in Encoding
eval (concept for scripting policy ) §: Defined in Scripting Policy
eval (concept for scripting-policy-dict ) §: Defined in Scripting Policy
"eval" (value for ScriptingPolicyViolationType WebIDL enumeration) §: Defined in Scripting Policy
AuthenticationExtensionsPRFInputs.eval (WebIDL dictionary member) §: Defined in Web Authentication
Eval code (concept for ECMAScript ) §: Defined in ECMAScript
globalThis.eval(x) (WebIDL operation) §: Defined in ECMAScript
globalThis.%eval%() (WebIDL operation) §: Defined in ECMAScript; Referenced in HTML, Source Phase Imports
AuthenticationExtensionsPRFInputs.evalByCredential (WebIDL dictionary member) §: Defined in Web Authentication
EvalDeclarationInstantiation (algorithm) §: Defined in ECMAScript; Referenced in ShadowRealm API
EvalError (exception) §: Defined in ECMAScript
EvalError (exception) §: Defined in Web IDL; Referenced in Trusted Types
%EvalError% (exception) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports
evaluate media queries and report changes (concept) §: Defined in CSSOM View
Evaluate() (algorithm for Cyclic Module Record ) §: Defined in ECMAScript; Referenced in HTML
XPathExpression.evaluate(contextNode, type, result) (WebIDL operation) §: Defined in DOM
XPathEvaluatorBase.evaluate(expression, contextNode, resolver, type, result) (WebIDL operation) §: Defined in DOM; Referenced in WebDriver BiDi
EvaluateCall (algorithm) §: Defined in ECMAScript
EvaluateNew (algorithm) §: Defined in ECMAScript
EvaluatePropertyAccessWithExpressionKey (algorithm) §: Defined in ECMAScript
EvaluatePropertyAccessWithIdentifierKey (algorithm) §: Defined in ECMAScript
EvaluateStringOrNumericBinaryExpression (algorithm) §: Defined in ECMAScript
"even" (value for ParityType WebIDL enumeration) §: Defined in Web Serial API
"evenodd" (value for CanvasFillRule WebIDL enumeration) §: Defined in HTML
evenodd (CSS value for clip-rule ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
evenodd (CSS value for fill-rule ) §: Defined in CSS Fill and Stroke 3
Event (WebIDL interface) §: Defined in DOM; Referenced in CSS Scroll Snap 2, Captured Mouse Events, Long Animation Frames API, The Capture-Handle Actions Mechanism, Web NFC API, Web Bluetooth, WebSockets, Background Fetch, Cookie Store API, Document Picture-in-Picture, Manifest Incubations, overscroll and scrollend events, Portals, Prioritized Task Scheduling, Web Speech API, WebHID API, WebUSB API, Window Controls Overlay, Clipboard API and events, Content Security Policy 3, CSS Animations 1, CSS Containment 2, CSS Font Loading 3, CSS Spatial Navigation 1, CSS Transitions, CSSOM View, EditContext API, Encrypted Media Extensions, Event Timing 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, Picture-in-Picture, Presentation API, Service Workers, UI Events, Web Animations, Web Animations 2, Web Audio API, WebGPU, Web MIDI API, WebRTC Encoded Transform, Identity for WebRTC 1.0, WebRTC 1.0, WebXR Device API, WebXR Layers API 1, XMLHttpRequest; Related terms: concept canceled flag, concept composed flag, concept constructor, concept dispatch flag, concept flatten, concept flatten more, concept in passive listener flag, concept initialize, concept initialized flag, concept path, concept relatedTarget, concept stop immediate propagation flag, concept stop propagation flag, concept target, concept touch target list, Event.bubbles, Event.cancelable, Event.cancelBubble, Event.composed, Event.currentTarget, Event.defaultPrevented, Event.eventPhase, Event.isTrusted, Event.returnValue, Event.srcElement, Event.target, Event.timeStamp, Event.type, Event.AT_TARGET, Event.BUBBLING_PHASE, Event.CAPTURING_PHASE, Event.NONE, new Event(type, eventInitDict), Event.composedPath(), Event.initEvent(type, bubbles, cancelable), Event.preventDefault(), Event.stopImmediatePropagation(), Event.stopPropagation(); see also WebIDLPedia
event (concept) §: Defined in DOM; Referenced in Early detection of input events, Manifest Incubations, Core Accessibility API Mappings 1.2, Digital Publishing Accessibility API Mappings 1.1, Generic Sensor API, Indexed DB 3.0, Service Workers, WebDriver, Identity for WebRTC 1.0, WebRTC 1.0
event (markup attribute for script ) §: Defined in HTML
event (concept) §: Defined in WebDriver BiDi; Referenced in XMLHttpRequest; Related terms: concept browsing context event map, concept event name, concept event parameters., concept event type, concept global event set, concept in the default event set, concept remote end event trigger, concept remote end subscribe steps, concept subscribe priority
event (concept for pending event ) §: Defined in Fenced Frame
HTMLScriptElement.event (WebIDL attribute) §: Defined in HTML
event (WebIDL attribute for Window ) §: Defined in DOM
event attribute (concept) §: Defined in SVG 2; Referenced in SVG Animations 2
event constructing steps (concept) §: Defined in DOM; Referenced in Portals, Pointer Events, Push API
event handler (concept) §: Defined in HTML; Referenced in Compatibility, DOM, Fullscreen API, Notifications API, WebSockets, Background Fetch, Content Index, Portals, Prioritized Task Scheduling, Web Preferences API, Battery Status API, CSS Animations 1, CSS Transitions, CSSOM View, Device Posture API, Generic Sensor API, DeviceOrientation Event, Orientation Sensor, Payment Handler API, Permissions, Presentation API, Remote Playback API, Screen Orientation, Screen Wake Lock API, Service Workers, SVG 2, Web Audio API, Web MIDI API, WebRTC 1.0, XMLHttpRequest; Related terms: concept listener
event handler content attribute (concept) §: Defined in HTML; Referenced in Fullscreen API, Scripting Policy, Portals, CSS Animations 1, CSS Transitions, File API, MathML Core, SVG 2
event handler event type (concept) §: Defined in HTML; Referenced in Compatibility, DOM, Fullscreen API, Notifications API, WebSockets, Background Fetch, Content Index, Prerendering Revamped, Portals, Prioritized Task Scheduling, Web Preferences API, Battery Status API, CSS Animations 1, CSS Transitions, CSSOM View, Device Posture API, File API, Generic Sensor API, Indexed DB 3.0, Media Source Extensions™, DeviceOrientation Event, Payment Handler API, Permissions, Presentation API, Push API, Remote Playback API, Screen Orientation, Screen Wake Lock API, Service Workers, WebCodecs, WebRTC 1.0, Window Management, XMLHttpRequest
event handler IDL attribute (concept) §: Defined in HTML; Referenced in DOM, Fullscreen API, Web Bluetooth, WebSockets, Background Fetch, Content Index, Idle Detection API, Manifest Incubations, Prerendering Revamped, Page Lifecycle, Portals, Prioritized Task Scheduling, Web Serial API, Web Preferences API, WebHID API, CSS Animations 1, CSS Transitions, CSSOM View, Device Posture API, Gamepad, Indexed DB 3.0, Media Source Extensions™, MiniApp Lifecycle, DeviceOrientation Event, Pointer Events, Pointer Lock 2.0, Push API, Screen Orientation, Screen Wake Lock API, Selection API, Service Workers, SVG 2, WebCodecs, WebGPU, WebXR Lighting Estimation API 1, WebXR Device API, Window Management
event handler map (concept for EventTarget ) §: Defined in HTML; Referenced in Service Workers
event is enabled (concept) §: Defined in WebDriver BiDi
event listener (concept) §: Defined in DOM; Referenced in HTML, Notifications API, Web Preferences API, CSSOM View, Generic Sensor API, Permissions, Service Workers, XMLHttpRequest; Related terms: concept callback
event loop (concept) §: Defined in HTML; Referenced in Encoding, Fetch, Fullscreen API, WebSockets, Fenced Frame, Prerendering Revamped, Portals, Prioritized Task Scheduling, Soft Navigations, Protected Audience, CSSOM View, Indexed DB 3.0, Intersection Observer, Pointer Events, requestIdleCallback() Cooperative Scheduling of Background Tasks, Service Workers, WebCodecs, WebDriver
event loop (concept for agent ) §: Defined in HTML; Referenced in Background Fetch, Content Index, Portals, Prioritized Task Scheduling, Soft Navigations, Contact Picker API, Service Workers, WebTransport
event name (concept for event ) §: Defined in WebDriver BiDi
event parameters. (concept for event ) §: Defined in WebDriver BiDi
event type (concept for event ) §: Defined in WebDriver BiDi
"event-listener" (value for ScriptInvokerType WebIDL enumeration) §: Defined in Long Animation Frames API
new Event(type, eventInitDict) (WebIDL constructor) §: Defined in DOM
SmartCardReaderStateOut.eventCount (WebIDL dictionary member) §: Defined in Web Smart Card API
EventCounts (WebIDL interface) §: Defined in Event Timing API; see also WebIDLPedia
Performance.eventCounts (WebIDL attribute) §: Defined in Event Timing API
FenceEvent.eventData (WebIDL dictionary member) §: Defined in Fenced Frame; Referenced in Shared Storage API
EventHandler (WebIDL type alias) §: Defined in HTML; Referenced in Compatibility, DOM, Fullscreen API, Notifications API, Captured Mouse Events, SVG Animations 2, Audio Session, The Capture-Handle Actions Mechanism, Web NFC API, IceTransport Extensions for WebRTC, Web Bluetooth, WebSockets, Background Fetch, Background Sync, Content Index, Cookie Store API, Document Picture-in-Picture, Idle Detection API, Keyboard Map, Manifest Incubations, Prerendering Revamped, Network Information API, Page Lifecycle, Web Periodic Background Synchronization, Portals, Prioritized Task Scheduling, Web Serial API, Web Speech API, Web Preferences API, Managed Configuration API, WebHID API, WebUSB API, Window Controls Overlay, Battery Status API, Capture Handle - Bootstrapping Collaboration when Screensharing, CSS Animations 1, CSS Font Loading 3, CSS Transitions, CSSOM View, Device Posture API, EditContext API, Encrypted Media Extensions, File API, Gamepad, Generic Sensor API, Indexed DB 3.0, Media Source Extensions™, Media Capture and Streams, MediaStream Recording, MiniApp Lifecycle, DeviceOrientation Event, Payment Handler API, Payment Request API 1.1, Permissions, Picture-in-Picture, Pointer Events, Pointer Lock 2.0, Presentation API, Push API, Remote Playback API, Resource Timing, Screen Orientation, Screen Wake Lock API, Selection API, Service Workers, Touch Events, VirtualKeyboard API, Web Animations, Web Audio API, WebCodecs, WebGPU, Web MIDI API, WebRTC Encoded Transform, Identity for WebRTC 1.0, WebRTC 1.0, WebXR DOM Overlays, WebXR Lighting Estimation API 1, WebXR Device API, WebXR Layers API 1, Window Management, XMLHttpRequest; see also WebIDLPedia
EventHandlerNonNull (WebIDL callback) §: Defined in HTML
EventInit (WebIDL dictionary) §: Defined in DOM; Referenced in CSS Scroll Snap 2, HTML, Captured Mouse Events, The Capture-Handle Actions Mechanism, Web NFC API, Web Bluetooth, WebSockets, Cookie Store API, Document Picture-in-Picture, Manifest Incubations, Portals, Prioritized Task Scheduling, Web Speech API, WebHID API, WebUSB API, Window Controls Overlay, Clipboard API and events, Content Security Policy 3, CSS Animations 1, CSS Containment 2, CSS Font Loading 3, CSS Transitions, CSSOM View, EditContext API, Encrypted Media Extensions, Gamepad, Generic Sensor API, Indexed DB 3.0, Media Source Extensions™, Media Capture and Streams, DeviceOrientation Event, Payment Request API 1.1, Picture-in-Picture, Presentation API, Service Workers, UI Events, Web Animations, Web Animations 2, Web Audio API, WebGPU, Web MIDI API, WebRTC Encoded Transform, WebRTC 1.0, WebXR Device API, WebXR Layers API 1, XMLHttpRequest; Related terms: EventInit.bubbles, EventInit.cancelable, EventInit.composed; see also WebIDLPedia
EventListener (WebIDL callback) §: Defined in DOM; Referenced in HTML, Long Animation Frames API, Web IDL, Capture Handle - Bootstrapping Collaboration when Screensharing, CSSOM View, Pointer Events, SVG 2, UI Events; Related terms: EventListener.handleEvent(event)
EventListenerOptions (WebIDL dictionary) §: Defined in DOM; Related terms: EventListenerOptions.capture; see also WebIDLPedia
EventModifierInit (WebIDL dictionary) §: Defined in UI Events; Related terms: EventModifierInit.altKey, EventModifierInit.ctrlKey, EventModifierInit.metaKey, EventModifierInit.modifierAltGraph, EventModifierInit.modifierCapsLock, EventModifierInit.modifierFn, EventModifierInit.modifierFnLock, EventModifierInit.modifierHyper, EventModifierInit.modifierNumLock, EventModifierInit.modifierScrollLock, EventModifierInit.modifierSuper, EventModifierInit.modifierSymbol, EventModifierInit.modifierSymbolLock, EventModifierInit.shiftKey; see also WebIDLPedia
Event.eventPhase (WebIDL attribute) §: Defined in DOM; Referenced in UI Events
EventSet (algorithm) §: Defined in ECMAScript
EventSource (WebIDL interface) §: Defined in HTML; Referenced in Fetch, URL, Resource Timing; Related terms: EventSource.onerror, EventSource.onmessage, EventSource.onopen, EventSource.readyState, EventSource.url, EventSource.withCredentials, EventSource.CLOSED, EventSource.CONNECTING, EventSource.OPEN, new EventSource(url, eventSourceInitDict), event error, event message, event open, EventSource.close(); see also WebIDLPedia
new EventSource(url, eventSourceInitDict) (WebIDL constructor) §: Defined in HTML
AttributionReportingRequestOptions.eventSourceEligible (WebIDL dictionary member) §: Defined in Attribution Reporting
EventSourceInit (WebIDL dictionary) §: Defined in HTML; Related terms: EventSourceInit.withCredentials; see also WebIDLPedia
SmartCardReaderStateOut.eventState (WebIDL dictionary member) §: Defined in Web Smart Card API
EventTarget (WebIDL interface) §: Defined in DOM; Referenced in Notifications API, Audio Session, Web NFC API, Web Bluetooth, WebSockets, Background Fetch, Cookie Store API, Document Picture-in-Picture, Idle Detection API, JS Self-Profiling API, Keyboard Lock, Portals, Web Serial API, Soft Navigations, Web Speech API, Web Preferences API, Device Attributes API, Managed Configuration API, WebHID API, WebUSB API, Window Controls Overlay, Writing Promise-Using Specifications, Battery Status API, Clipboard API and events, Content Security Policy 3, CSS Font Loading 3, CSS Spatial Navigation 1, CSS Pseudo-Elements 4, CSS Regions 1, CSSOM View, Device Posture API, EditContext API, Encrypted Media Extensions, File API, Generic Sensor API, High Resolution Time, Indexed DB 3.0, Media Source Extensions™, Media Capture and Streams, MediaStream Recording, Payment Request API 1.1, Permissions, Picture-in-Picture, Presentation API, Remote Playback API, Screen Capture, Screen Orientation, Screen Wake Lock API, Service Workers, Touch Events, UI Events, VirtualKeyboard API, Web Animations, Web Audio API, WebCodecs, WebGPU, Web MIDI API, WebRTC Encoded Transform, WebRTC 1.0, WebXR Lighting Estimation API 1, WebXR Device API, Window Management, XMLHttpRequest; Related terms: concept activation behavior, concept event handler map, concept legacy-canceled-activation behavior, concept legacy-pre-activation behavior, new EventTarget(), EventTarget.addEventListener(type, callback, options), EventTarget.dispatchEvent(event), EventTarget.removeEventListener(type, callback, options); see also WebIDLPedia
new EventTarget() (WebIDL constructor) §: Defined in DOM
FenceEvent.eventType (WebIDL dictionary member) §: Defined in Fenced Frame; Referenced in Shared Storage API
%TypedArray%.every(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
Array.every(callbackfn, thisArg) (WebIDL operation) §: Defined in ECMAScript
evidence (concept) §: Defined in Verifiable Credentials Data Model v2.0
ew-resize (CSS value for cursor ) §: Defined in CSS User Interface 3 , CSS User Interface 4; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
ex (CSS value for text-box-edge ) §: Defined in CSS Inline Layout 3
ex (CSS value for <length> ) §: Defined in CSS Values 3 , CSS Values 4 , CSS 2.2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023, CSS Cascading 3, CSS Cascading 4, CSS Cascading 5, CSS Fonts 4, CSS Fonts 5, CSS Paged Media 3, CSS Properties and Values API 1
ex-height (CSS value for font-size-adjust ) §: Defined in CSS Fonts 5
ex-height | cap-height | ch-width | ic-width | ic-height (CSS value for font-size-adjust ) §: Defined in CSS Fonts 5
ex(value) (WebIDL operation for CSS ) §: Defined in CSS Typed OM 1
exact (CSS value for print-color-adjust ) §: Defined in CSS Color Adjustment 1
ConstrainBooleanParameters.exact (WebIDL dictionary member) §: Defined in Media Capture and Streams
ConstrainDOMStringParameters.exact (WebIDL dictionary member) §: Defined in Media Capture and Streams
ConstrainDoubleRange.exact (WebIDL dictionary member) §: Defined in Media Capture and Streams
ConstrainPoint2DParameters.exact (WebIDL dictionary member) §: Defined in MediaStream Image Capture
ConstrainULongRange.exact (WebIDL dictionary member) §: Defined in Media Capture and Streams
exact matching (concept) §: Defined in CSS 2.1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Exception (WebIDL interface) §: Defined in WebAssembly JavaScript Interface: Exception Handling; Related terms: Exception.stack, new Exception(exceptionTag, payload, options), Exception.getArg(index), Exception.is(exceptionTag); see also WebIDLPedia
exception (concept) §: Defined in Web IDL; Referenced in Fetch, Web Smart Card API, Credential Management 1, Payment Request API 1.1, Permissions, Push API, Screen Orientation, Service Workers; Related terms: concept create, concept throw
new Exception(exceptionTag, payload, options) (WebIDL constructor) §: Defined in WebAssembly JavaScript Interface: Exception Handling
ExceptionOptions (WebIDL dictionary) §: Defined in WebAssembly JavaScript Interface: Exception Handling; Related terms: ExceptionOptions.traceStack; see also WebIDLPedia
exceptionsEnabled (concept) §: Defined in HTML; Referenced in Service Workers
Exchange (concept) §: Defined in Loading Signed Exchanges
Exchange Signature (concept) §: Defined in Loading Signed Exchanges
Atomics.exchange(typedArray, index, value) (WebIDL operation) §: Defined in ECMAScript
exclude (CSS value for mask-composite ) §: Defined in CSS Masking 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
"exclude" (value for SelfCapturePreferenceEnum WebIDL enumeration) §: Defined in Screen Capture
"exclude" (value for SystemAudioPreferenceEnum WebIDL enumeration) §: Defined in Screen Capture
"exclude" (value for SurfaceSwitchingPreferenceEnum WebIDL enumeration) §: Defined in Screen Capture
"exclude" (value for MonitorTypeSurfacesEnum WebIDL enumeration) §: Defined in Screen Capture
exclude fragment (concept for URL serializer ) §: Defined in URL; Referenced in Fetch, HTML, Web Application Manifest
exclude fragments (concept for equals of url ) §: Defined in URL; Referenced in HTML
FilePickerOptions.excludeAcceptAllOption (WebIDL dictionary member) §: Defined in File System Access
PublicKeyCredentialCreationOptions.excludeCredentials (WebIDL dictionary member) §: Defined in Web Authentication
PublicKeyCredentialCreationOptionsJSON.excludeCredentials (WebIDL dictionary member) §: Defined in Web Authentication
excluding input (concept) §: Defined in Layout Instability
exclusion (CSS value for <blend-mode> ) §: Defined in Compositing 2 , Compositing 1; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
Exclusion Draft (concept) §: Defined in W3C Process Document
Exclusion Draft Charter (concept) §: Defined in W3C Process Document
HIDDeviceRequestOptions.exclusionFilters (WebIDL dictionary member) §: Defined in WebHID API
RequestDeviceOptions.exclusionFilters (WebIDL dictionary member) §: Defined in Web Bluetooth
USBDeviceRequestOptions.exclusionFilters (WebIDL dictionary member) §: Defined in WebUSB API
USBPermissionDescriptor.exclusionFilters (WebIDL dictionary member) §: Defined in WebUSB API
"exclusive" (value for SmartCardAccessMode WebIDL enumeration) §: Defined in Web Smart Card API
"exclusive" (value for LockMode WebIDL enumeration) §: Defined in Web Locks API
FileSystemFlags.exclusive (WebIDL dictionary member) §: Defined in File and Directory Entries API
SmartCardReaderStateFlagsIn.exclusive (WebIDL dictionary member) §: Defined in Web Smart Card API
SmartCardReaderStateFlagsOut.exclusive (WebIDL dictionary member) §: Defined in Web Smart Card API
exclusive Text node (concept) §: Defined in DOM
GPUBindGroupLayout.[[exclusivePipeline]] (internal slot) §: Defined in WebGPU
URLPattern.exec(input, baseURL) (WebIDL operation) §: Defined in URL Pattern
RegExp.exec(string) (WebIDL operation) §: Defined in ECMAScript; Referenced in Web Bluetooth
ExecuteAsyncModule (algorithm) §: Defined in ECMAScript; Referenced in Source Phase Imports
GPURenderPassEncoder.executeBundles(bundles) (WebIDL operation) §: Defined in WebGPU
ExecuteModule(capability) (algorithm for Cyclic Module Record ) §: Defined in ECMAScript
executing thread (concept for ECMAScript ) §: Defined in ECMAScript
execution context (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in HTML, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Import Attributes, Iterator Helpers, JSON modules, ShadowRealm API, Source Phase Imports
execution context stack (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in HTML, ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Import Attributes, Iterator Helpers, JSON modules, ShadowRealm API, Source Phase Imports, Protected Audience
execution ready flag (concept for environment ) §: Defined in HTML; Referenced in WebDriver BiDi, Service Workers
execution-while-not-rendered (concept) §: Defined in Page Lifecycle
execution-while-out-of-viewport (concept) §: Defined in Page Lifecycle
executionContexts (grammar) §: Defined in Clear Site Data
GenerateBidInterestGroup.executionMode (WebIDL dictionary member) §: Defined in Protected Audience
PerformanceScriptTiming.executionStart (WebIDL attribute) §: Defined in Long Animation Frames API
exempt resource (concept) §: Defined in EPUB 3.3
exfiltration budget metadata (concept for fencedframetype ) §: Defined in Fenced Frame
exfiltration budget metadata (concept for fenced frame config ) §: Defined in Fenced Frame; Referenced in Protected Audience
exfiltration budget metadata reference (concept for fencedframetype ) §: Defined in Fenced Frame
exfiltration budget metadata reference (concept for fenced frame config instance ) §: Defined in Fenced Frame
exhaustive set of sandbox flags (concept for fencedframetype ) §: Defined in Fenced Frame
exist (concept for map ) §: Defined in Infra; Referenced in Console, DOM, Federated Credential Management API, Fetch, File System, HTML, MIME Sniffing, Notifications API, Topics API, Navigational-Tracking Mitigations, Storage, Streams, URL Pattern, Web NFC API, WebDriver BiDi, 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, Web Bluetooth, Web IDL, Attribution Reporting, Background Fetch, Content Index, Fenced Frame, File System Access, Get Installed Related Apps API, Local Font Access, Manifest Incubations, No-Vary-Search, Prerendering Revamped, Speculation Rules, Private Network Access, HTML Sanitizer API, Prioritized Task Scheduling, Shared Storage API, Soft Navigations, Private State Token API, Protected Audience, Web App Launch Handler API, Web Smart Card API, Loading Signed Exchanges, Web Application Manifest, Compute Pressure 1, Credential Management 1, CSS Animation Worklet API, CSS Layout API 1, CSS Painting API 1, CSS Properties and Values API 1, CSS Shadow Parts, CSS Typed OM 1, CSS View Transitions 1, CSSOM View, Encrypted Media Extensions, Event Timing API, File API, Generic Sensor API, Media Capabilities, Media Capture and Streams, Viewport Capture, MiniApp Manifest, MiniApp Packaging, DeviceOrientation Event, Payment Method Manifest, Permissions Policy, Screen Capture, Server Timing, Service Workers, User Timing, Verifiable Credential Data Integrity 1.0, WebAssembly JavaScript Interface, Web Animations, Web Animations 2, Web Locks API, Web Audio API, Web Authentication, WebCodecs, WebDriver, WebGPU, Web Neural Network API, WebRTC Statistics, SVC, WebRTC 1.0, WebTransport, XMLHttpRequest
exit (event for TextTrackCue ) §: Defined in HTML
exit (CSS value for animation-timeline-range ) §: Defined in Scroll-driven Animations
exit-crossing (CSS value for animation-timeline-range ) §: Defined in Scroll-driven Animations
Document.exitFullscreen() (WebIDL operation) §: Defined in Fullscreen API
Document.exitPictureInPicture() (WebIDL operation) §: Defined in Picture-in-Picture
Document.exitPointerLock() (WebIDL operation) §: Defined in Pointer Lock 2.0
exotic object (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ShadowRealm API, Temporal
exp() (CSS function) §: Defined in CSS Values 4
MLGraphBuilder.exp(input) (WebIDL operation) §: Defined in Web Neural Network API
Math.exp(x) (WebIDL operation) §: Defined in ECMAScript
JsonLdProcessor.expand() (WebIDL operation) §: Defined in JSON-LD 1.1 Processing Algorithms and API
MLGraphBuilder.expand(input, newShape) (WebIDL operation) §: Defined in Web Neural Network API
JsonLdOptions.expandContext (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Processing Algorithms and API
"expanded" (value for CanvasFontStretch WebIDL enumeration) §: Defined in HTML
expanded (CSS value for font-width ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
expanded name (concept) §: Defined in CSS Namespaces 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
NodeIterator.expandEntityReferences (WebIDL attribute) §: Defined in DOM
TreeWalker.expandEntityReferences (WebIDL attribute) §: Defined in DOM
expect (value for rel attribute of link element ) §: Defined in HTML; Referenced in CSS View Transitions 2
VideoFrameCallbackMetadata.expectedDisplayTime (WebIDL dictionary member) §: Defined in HTMLVideoElement.requestVideoFrameCallback()
InkPresenter.expectedImprovement (WebIDL attribute) §: Defined in Ink API
MediaKeySession.expiration (WebIDL attribute) §: Defined in Encrypted Media Extensions
PushSubscription.expirationTime (WebIDL attribute) §: Defined in Push API
PushSubscriptionJSON.expirationTime (WebIDL dictionary member) §: Defined in Push API
Expire the current texture (algorithm) §: Defined in WebGPU
GPUExternalTexture.[[expired]] (internal slot) §: Defined in WebGPU
"expired" (value for MediaKeyStatus WebIDL enumeration) §: Defined in Encrypted Media Extensions
WebTransportDatagramStats.expiredIncoming (WebIDL dictionary member) §: Defined in WebTransport
WebTransportDatagramStats.expiredOutgoing (WebIDL dictionary member) §: Defined in WebTransport
CookieInit.expires (WebIDL dictionary member) §: Defined in Cookie Store API
CookieListItem.expires (WebIDL dictionary member) §: Defined in Cookie Store API
RTCCertificate.expires (WebIDL attribute) §: Defined in WebRTC 1.0
RTCCertificateExpiration.expires (WebIDL dictionary member) §: Defined in WebRTC 1.0
StorageBucketOptions.expires (WebIDL dictionary member) §: Defined in Storage Buckets API
StorageBucket.expires() (WebIDL operation) §: Defined in Storage Buckets API
expiry time (concept for prefetch record ) §: Defined in Prefetch
TrackingExData.explanation (WebIDL dictionary member) §: Defined in DNT
"explicit" (value for ChannelCountMode WebIDL enumeration) §: Defined in Web Audio API
JsonLdOptions.explicit (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Framing
explicit grid (concept) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
explicit grid span (concept) §: Defined in CSS Grid Layout 2
explicit intrinsic inner size (concept) §: Defined in CSS Sizing 4
<explicit-track-list> (CSS type) §: Defined in CSS Grid Layout 1 , CSS Grid Layout 2
Math.expm1(x) (WebIDL operation) §: Defined in ECMAScript
exponent (markup attribute for feComponentTransfer ) §: Defined in Filter Effects 1
SVGComponentTransferFunctionElement.exponent (WebIDL attribute) §: Defined in Filter Effects 1
"exponential" (value for DistanceModelType WebIDL enumeration) §: Defined in Web Audio API
AudioParam.exponentialRampToValueAtTime(value, endTime) (WebIDL operation) §: Defined in Web Audio API
ExportEntry Record (concept for ECMAScript ) §: Defined in ECMAScript; Referenced in ECMAScript Async Explicit Resource Management, ECMAScript Explicit Resource Management, Source Phase Imports
SubtleCrypto.exportKey() (WebIDL operation) §: Defined in Web Cryptography API
exportparts (markup attribute for html-global ) §: Defined in CSS Shadow Parts
Instance.exports (WebIDL attribute) §
Instance.exports (WebIDL attribute) §
Instance.exports (WebIDL attribute) §
Instance.exports (WebIDL attribute) §
Instance.exports (WebIDL attribute) §
Instance.exports (WebIDL attribute) §: 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
Module.exports(moduleObject) (WebIDL operation) §
Module.exports(moduleObject) (WebIDL operation) §
Module.exports(moduleObject) (WebIDL operation) §
Module.exports(moduleObject) (WebIDL operation) §
Module.exports(moduleObject) (WebIDL operation) §
Module.exports(moduleObject) (WebIDL operation) §: 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
expose legacy touch event APIs (concept) §: Defined in Touch Events
Exposed (WebIDL extended attribute) §: Defined in Web IDL; Referenced in DOM, Font Metrics API 1, CSS Scroll Snap 2, CSS View Transitions 2, Federated Credential Management API, Fetch, File System, WebXR Anchors, The <model> element, WebXR Raw Camera Access, WebXR Mesh Detection, Notifications API, Captured Mouse Events, Element Capture, Storage, Test Utils, URL Pattern, Audio Session, Gamepad Extensions, Long Animation Frames API, Media Playback Quality, The Capture-Handle Actions Mechanism, Web NFC API, IceTransport Extensions for WebRTC, WebAssembly JavaScript Interface: Content Security Policy, WebAssembly JavaScript Interface: Exception Handling, WebAssembly JavaScript Interface: Type Reflection, Web Bluetooth, Web Bluetooth Scanning, WebSockets, Background Sync, Cookie Store API, Digital Goods API, Digital Credentials, Direct Sockets API, Document Picture-in-Picture, Element Timing API, File and Directory Entries API, EyeDropper API, Fenced Frame, File System Access, Idle Detection API, Input Device Capabilities, Early detection of input events, JS Self-Profiling API, Keyboard Map, Layout Instability, Local Font Access, Manifest Incubations, Network Information API, HTML Sanitizer API, Prioritized Task Scheduling, URL Fragment Text Directives, Web Serial API, Accelerated Shape Detection in Images, Accelerated Text Detection in Images, Shared Storage API, Soft Navigations, Storage Buckets API, Protected Audience, User-Agent Client Hints, Web App Launch Handler API, Web Preferences API, Web Smart Card API, WebHID API, WebUSB API, Window Controls Overlay, Accelerometer, Ambient Light Sensor, Autoplay Policy Detection, Battery Status API, Clipboard API and events, Compute Pressure 1, Contact Picker API, Credential Management 1, Content Security Policy 3, CSS Anchor Positioning, CSS Animation Worklet API, CSS Animations 1, CSS Animations 2, CSS Cascading 5, CSS Cascading 6, CSS Color 5, CSS Conditional 3, CSS Containment 2, CSS Containment 3, CSS Counter Styles 3, CSS Font Loading 3, CSS Fonts 4, CSS Custom Highlight API 1, CSS Layout API 1, CSS Masking 1, CSS Spatial Navigation 1, CSS Nesting, CSS Painting API 1, CSS Properties and Values API 1, CSS Pseudo-Elements 4, CSS Regions 1, CSS Transitions, CSS Transitions 2, CSS Typed OM 1, CSS View Transitions 1, CSSOM, CSSOM View, Device Memory, Device Posture API, DOM Parsing and Serialization, EditContext API, Encrypted Media Extensions, EPUB Reading Systems 3.3, Event Timing API, File API, Filter Effects 1, Gamepad, Generic Sensor API, Geolocation Sensor, Geolocation API, Geometry Interfaces 1, Gyroscope, High Resolution Time, MediaStream Image Capture, Indexed DB 3.0, Intersection Observer, JSON-LD 1.1 Processing Algorithms and API, JSON-LD 1.1 Framing, Largest Contentful Paint, Long Tasks API, Magnetometer, MathML Core, Media Capabilities, Media Source Extensions™, Media Capture from DOM Elements, Region Capture, Media Capture and Streams, MediaStreamTrack Insertable Media Processing using Streams, Media Session, MediaStream Recording, MiniApp Lifecycle, DeviceOrientation Event, Orientation Sensor, Paint Timing, Payment Handler API, Payment Request API 1.1, Performance Timeline, Permissions Policy, Permissions, Picture-in-Picture, Pointer Events, Presentation API, Proximity Sensor, Push API, Remote Playback API, Reporting API, requestIdleCallback() Cooperative Scheduling of Background Tasks, Resize Observer, Resource Timing, Screen Capture, Screen Orientation, Screen Wake Lock API, Scroll-driven Animations, Selection API, Server Timing, Service Workers, Touch Events, Trusted Types, UI Events, User Timing, VirtualKeyboard API, WebAssembly Web API, Web Animations, Web Animations 2, Web Locks API, Web Audio API, Web Authentication, WebCodecs, Web Cryptography API, WebGPU, Web MIDI API, Web Neural Network API, WebRTC Encoded Transform, Identity for WebRTC 1.0, WebRTC 1.0, WebTransport, WebVTT: The Web Video Text Tracks Format, WebXR Depth Sensing, WebXR Hand Input 1, WebXR Hit Test, WebXR Lighting Estimation API 1, WebXR Device API, WebXR Layers API 1, Window Management, XMLHttpRequest
exposed (concept) §: Defined in Web IDL; Referenced in HTML, Secure Contexts
Exposed for paint timing (concept) §: Defined in Paint Timing; Referenced in Element Timing API, Largest Contentful Paint
CaptureHandleConfig.exposeOrigin (WebIDL dictionary member) §: Defined in Capture Handle - Bootstrapping Collaboration when Screensharing
exposure decision algorithm for devices other than camera and microphone (concept) §: Defined in Media Capture and Streams
exposure set (concept) §: Defined in Web IDL; Referenced in Prerendering Revamped
MediaTrackCapabilities.exposureCompensation (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackConstraintSet.exposureCompensation (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSettings.exposureCompensation (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSupportedConstraints.exposureCompensation (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackCapabilities.exposureMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackConstraintSet.exposureMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSettings.exposureMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSupportedConstraints.exposureMode (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackCapabilities.exposureTime (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackConstraintSet.exposureTime (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSettings.exposureTime (WebIDL dictionary member) §: Defined in MediaStream Image Capture
MediaTrackSupportedConstraints.exposureTime (WebIDL dictionary member) §: Defined in MediaStream Image Capture
Express permission (concept) §: Defined in Permissions; Referenced in DeviceOrientation Event
JsonWebKey.ext (WebIDL dictionary member) §: Defined in Web Cryptography API
extend (concept for list ) §: Defined in Infra; Referenced in HTML, WebDriver BiDi, Web IDL, Fenced Frame, Prioritized Task Scheduling, Protected Audience, Publication Manifest, Web Animations, WebGPU, WebXR Device API
Extend a Font Subset (algorithm) §: Defined in Incremental Font Transfer
extend lifetime promises (concept for ExtendableEvent ) §: Defined in Service Workers; Referenced in Web Periodic Background Synchronization
Selection.extend() (WebIDL operation) §: Defined in Selection API
ExtendableCookieChangeEvent (WebIDL interface) §: Defined in Cookie Store API; Related terms: ExtendableCookieChangeEvent.changed, ExtendableCookieChangeEvent.deleted, new ExtendableCookieChangeEvent(type, eventInitDict); see also WebIDLPedia
new ExtendableCookieChangeEvent(type, eventInitDict) (WebIDL constructor) §: Defined in Cookie Store API
ExtendableCookieChangeEventInit (WebIDL dictionary) §: Defined in Cookie Store API; Related terms: ExtendableCookieChangeEventInit.changed, ExtendableCookieChangeEventInit.deleted; see also WebIDLPedia
ExtendableEvent (WebIDL interface) §: Defined in Service Workers; Referenced in Notifications API, Background Fetch, Content Index, Cookie Store API, Web Periodic Background Synchronization; Related terms: concept active, concept add lifetime promise, concept extend lifetime promises, concept timed out flag, new ExtendableEvent(type, eventInitDict), ExtendableEvent.waitUntil(f); see also WebIDLPedia
new ExtendableEvent(type, eventInitDict) (WebIDL constructor) §: Defined in Service Workers
ExtendableEventInit (WebIDL dictionary) §: Defined in Service Workers; Referenced in Notifications API, Background Fetch, Content Index, Cookie Store API, Web Periodic Background Synchronization; see also WebIDLPedia
ExtendableMessageEvent (WebIDL interface) §: Defined in Service Workers; Related terms: ExtendableMessageEvent.data, ExtendableMessageEvent.lastEventId, ExtendableMessageEvent.origin, ExtendableMessageEvent.ports, ExtendableMessageEvent.source, new ExtendableMessageEvent(type, eventInitDict); see also WebIDLPedia
new ExtendableMessageEvent(type, eventInitDict) (WebIDL constructor) §: Defined in Service Workers
ExtendableMessageEventInit (WebIDL dictionary) §: Defined in Service Workers; Related terms: ExtendableMessageEventInit.data, ExtendableMessageEventInit.lastEventId, ExtendableMessageEventInit.origin, ExtendableMessageEventInit.ports, ExtendableMessageEventInit.source; see also WebIDLPedia
extended attribute (concept) §: Defined in Web IDL; Referenced in HTML, DOM Parsing and Serialization; Related terms: concept takes a named argument list, concept takes a wildcard, concept takes an argument list, concept takes an identifier, concept takes an identifier list, concept takes no arguments
Extended grapheme cluster (concept) §: Defined in Internationalization Glossary
Extended language range (concept) §: Defined in Internationalization Glossary
extends (CSS value for system descriptor of @counter-style @rule ) §: Defined in CSS Counter Styles 3; Referenced in CSS Snapshot 2022, CSS Snapshot 2023
extension command URI Template (concept) §: Defined in WebDriver; Referenced in Background Fetch, Generic Sensor API, Reporting API
extension commands (concept) §: Defined in WebDriver; Referenced in Federated Credential Management API, HTML, Attribution Reporting, Generic Sensor API, DeviceOrientation Event, Secure Payment Confirmation, Web Authentication; Related terms: concept add mock camera, concept add mock microphone, concept delete mock camera, concept delete mock capture device, concept get capture prompt result, concept get mock capture devices, concept reset mock capture devices, concept set capture prompt result, concept set default mock microphone device, concept Set Permission
extension modules (concept) §: Defined in WebDriver BiDi; Referenced in Permissions
extension sensor interface (concept) §: Defined in Generic Sensor API; Referenced in Accelerometer, Gyroscope, Magnetometer, Orientation Sensor, Proximity Sensor
<extension-name> (CSS type) §: Defined in CSS Extensions; Referenced in Media Queries 5
extension-token (grammar) §: Defined in Referrer Policy
PublicKeyCredentialCreationOptions.extensions (WebIDL dictionary member) §: Defined in Web Authentication
PublicKeyCredentialCreationOptionsJSON.extensions (WebIDL dictionary member) §: Defined in Web Authentication
PublicKeyCredentialRequestOptions.extensions (WebIDL dictionary member) §: Defined in Web Authentication; Referenced in Secure Payment Confirmation
PublicKeyCredentialRequestOptionsJSON.extensions (WebIDL dictionary member) §: Defined in Web Authentication
SecurePaymentConfirmationRequest.extensions (WebIDL dictionary member) §: Defined in Secure Payment Confirmation
WebSocket.extensions (WebIDL attribute) §: Defined in WebSockets
external (value for rel attribute of a, rel attribute of area element, rel attribute of form element ) §: Defined in HTML
Window.external (WebIDL attribute) §: Defined in HTML
External (WebIDL interface) §: Defined in HTML; Related terms: External.AddSearchProvider(), External.IsSearchProviderInstalled(); see also WebIDLPedia
external file reference (concept) §: Defined in SVG 2
external resource link (concept) §: Defined in HTML
"externalScript" (value for ScriptingPolicyViolationType WebIDL enumeration) §: Defined in Scripting Policy
GPUBindGroupLayoutEntry.externalTexture (WebIDL dictionary member) §: Defined in WebGPU; Referenced in WebGPU Shading Language
ExternKind (WebIDL enumeration) §: Defined in WebAssembly JavaScript Interface: Type Reflection; Related terms: value function, value global, value memory, value table; see also WebIDLPedia
"externref" (value for TableKind 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
"externref" (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
ExternType (WebIDL dictionary) §: Defined in WebAssembly JavaScript Interface: Type Reflection; Related terms: ExternType.kind, ExternType.type; see also WebIDLPedia
extra permission data (concept for powerful feature ) §: Defined in Permissions; Referenced in Web Bluetooth, Web Bluetooth Scanning
extra permission data constraints (concept for powerful feature ) §: Defined in Permissions; Referenced in Web Bluetooth
extra permission data type (concept for powerful feature ) §: Defined in Permissions; Referenced in Web Bluetooth, WebUSB API
"extra-condensed" (value for CanvasFontStretch WebIDL enumeration) §: Defined in HTML
extra-condensed (CSS value for font-width ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
"extra-expanded" (value for CanvasFontStretch WebIDL enumeration) §: Defined in HTML
extra-expanded (CSS value for font-width ) §: Defined in CSS Fonts 4; Referenced in CSS Snapshot 2023
extract (concept for live range ) §: Defined in DOM
extract (concept for BodyInit ) §: Defined in Fetch; Referenced in Beacon; Related terms: concept keepalive
extract a length (concept for header list ) §: Defined in Fetch; Referenced in XMLHttpRequest
extract a MIME type (concept for header list ) §: Defined in Fetch; Referenced in Federated Credential Management API, HTML, Speculation Rules, Protected Audience, Loading Signed Exchanges, Service Workers, XMLHttpRequest
extract full timing info (concept for fetch controller ) §: Defined in Fetch; Referenced in HTML
extract header list values (concept) §: Defined in Fetch; Referenced in WebSockets, Private Network Access, Loading Signed Exchanges, Clear Site Data, Content Security Policy 3, Network Error Logging, Payment Method Manifest, Referrer Policy, Service Workers
extract header values (concept) §: Defined in Fetch
CryptoKey.extractable (WebIDL attribute) §: Defined in Web Cryptography API
JsonLdOptions.extractAllScripts (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Processing Algorithms and API
LoadDocumentOptions.extractAllScripts (WebIDL dictionary member) §: Defined in JSON-LD 1.1 Processing Algorithms and API
Range.extractContents() (WebIDL operation) §: Defined in DOM
ExtractHighWaterMark (algorithm) §: Defined in Streams
ExtractSizeAlgorithm (algorithm) §: Defined in Streams
Extrinsic sizing (concept) §: Defined in CSS Sizing 3; Referenced in CSS Sizing 4
"eye" (value for LandmarkType WebIDL enumeration) §: Defined in Accelerated Shape Detection in Images
XRView.eye (WebIDL attribute) §: Defined in WebXR Device API
EyeDropper (WebIDL interface) §: Defined in EyeDropper API; Related terms: WebIDL constructor constructor(), EyeDropper.open(); see also WebIDLPedia