Mozilla Developer Network
When writing code for the Web using JavaScript, there are a great many APIs available. Below is a list of all the interfaces (that is, types of objects) that you may be able to use while developing your Web app or site. For a list of the APIs that contain each of these interfaces, see Web API reference.
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AnalyserNodeAnimationEventAppAppsAttrAudioBufferAudioBufferSourceNodeAudioContextAudioDestinationNodeAudioListenerAudioNodeAudioParamAudioProcessingEvent
CallEventCameraCapabilitiesCameraControlCameraManagerCanvasGradientCanvasPatternCanvasPixelArrayCanvasRenderingContext2DCaretPositionCDATASectionChannelMergerNodeChannelSplitterNodeCharacterDataChildNodeChromeWorkerCloseEventCommentCompositionEventConnectionConsoleContactManagerConvolverNodeCoordinatesCSSCSSConditionRuleCSSGroupingRuleCSSKeyframeRuleCSSKeyframesRuleCSSMediaRuleCSSNamespaceRuleCSSPageRuleCSSRuleCSSRuleListCSSStyleDeclarationCSSStyleRuleCSSStyleSheetCSSSupportsRuleCustomEvent
DataTransferDedicatedWorkerGlobalScopeDelayNodeDeviceAccelerationDeviceLightEventDeviceMotionEventDeviceOrientationEventDeviceProximityEventDeviceRotationRateDeviceStorageDeviceStorageChangeEventDirectoryEntryDirectoryEntrySyncDirectoryReaderDirectoryReaderSyncDocumentDocumentFragmentDocumentTouchDocumentTypeDOMConfigurationDOMCursorDOMErrorDOMErrorHandlerDOMExceptionDOMHighResTimeStampDOMImplementationDOMImplementationListDOMImplementationSourceDOMLocatorDOMObjectDOMParserDOMRequestDOMStringDOMStringListDOMStringMapDOMTimeStampDOMTokenListDOMUserDataDynamicsCompressorNode
ElementElementTraversalEntityEntityReferenceEntryEntrySyncEventEventListenerEventSourceEventTargetExtensions
FileFileEntryFileEntrySyncFileErrorFileExceptionFileListFileReaderFileSystemFileSystemSyncFMRadioFocusEventFormData
HistoryHTMLAnchorElementHTMLAreaElementHTMLAudioElementHTMLBaseElementHTMLBaseFontElementHTMLBodyElementHTMLBRElementHTMLButtonElementHTMLCanvasElementHTMLCollectionHTMLDataElementHTMLDataListElementHTMLDivElementHTMLDListElementHTMLDocumentHTMLElementHTMLEmbedElementHTMLFieldSetElementHTMLFormControlsCollectionHTMLFormElementHTMLHeadElementHTMLHeadingElementHTMLHRElementHTMLHtmlElementHTMLIFrameElementHTMLImageElementHTMLInputElementHTMLIsIndexElementHTMLKeygenElementHTMLLabelElementHTMLLegendElementHTMLLIElementHTMLLinkElementHTMLMapElementHTMLMediaElementHTMLMetaElementHTMLMeterElementHTMLModElementHTMLObjectElementHTMLOListElementHTMLOptGroupElementHTMLOptionElementHTMLOptionsCollectionHTMLOutputElementHTMLParagraphElementHTMLParamElementHTMLPreElementHTMLProgressElementHTMLQuoteElementHTMLScriptElementHTMLSelectElementHTMLSourceElementHTMLSpanElementHTMLStyleElementHTMLTableCaptionElementHTMLTableCellElementHTMLTableColElementHTMLTableElementHTMLTableRowElementHTMLTableSectionElementHTMLTextAreaElementHTMLTimeElementHTMLTitleElementHTMLTrackElementHTMLUListElementHTMLUnknownElementHTMLVideoElement
IDBCursorIDBCursorWithValueIDBDatabaseIDBDatabaseExceptionIDBEnvironmentIDBFactoryIDBIndexIDBKeyRangeIDBObjectStoreIDBOpenDBRequestIDBRequestIDBTransactionIDBVersionChangeEventImageData
MediaQueryListMediaQueryListListenerMediaSourceMediaStreamMediaStreamTrackMessageEventMouseEventMouseScrollEventMouseWheelEventMozActivityMozActivityOptionsMozActivityRequestHandlerMozAlarmsManagerMozContactMozContactChangeEventMozIccManagerMozMmsEventMozMmsMessageMozMobileCellInfoMozMobileCFInfoMozMobileConnectionMozMobileConnectionInfoMozMobileICCInfoMozMobileMessageManagerMozMobileMessageThreadMozMobileNetworkInfoMozNetworkStatsMozNetworkStatsDataMozNetworkStatsManagerMozSettingsEventMozSmsEventMozSmsFilterMozSmsManagerMozSmsMessageMozSmsSegmentInfoMozTimeManagerMutationObserver
NamedNodeMapNameListNavigatorNavigatorGeolocationNavigatorIDNavigatorLanguageNavigatorOnLineNavigatorPluginsNetworkInformationNodeNodeFilterNodeIteratorNodeListNotationNotificationNotifyAudioAvailableEvent
PannerNodeParentNodePerformancePerformanceTimingPluginPluginArrayPositionPositionErrorPositionOptionsPowerManagerProcessingInstructionProgressEventPromisePromiseResolverPushManager
ScriptProcessorNodeSelectionSettingsLockSettingsManagerSharedWorkerStyleSheetStyleSheetListSVGAElementSVGAngleSVGAnimateColorElementSVGAnimatedAngleSVGAnimatedBooleanSVGAnimatedEnumerationSVGAnimatedIntegerSVGAnimatedLengthListSVGAnimatedNumberSVGAnimatedNumberListSVGAnimatedPointsSVGAnimatedPreserveAspectRatioSVGAnimatedRectSVGAnimatedStringSVGAnimatedTransformListSVGAnimateElementSVGAnimateMotionElementSVGAnimateTransformElementSVGAnimationElementSVGCircleElementSVGClipPathElementSVGCursorElementSVGDefsElementSVGDescElementSVGElementSVGEllipseElementSVGFilterElementSVGFontElementSVGFontFaceElementSVGFontFaceFormatElementSVGFontFaceNameElementSVGFontFaceSrcElementSVGFontFaceUriElementSVGForeignObjectElementSVGGElementSVGGlyphElementSVGGradientElementSVGHKernElementSVGImageElementSVGLengthSVGLengthListSVGLinearGradientElementSVGLineElementSVGMaskElementSVGMatrixSVGMissingGlyphElementSVGMPathElementSVGNumberSVGNumberListSVGPathElementSVGPatternElementSVGPolygonElementSVGPolylineElementSVGPreserveAspectRatioSVGRadialGradientElementSVGRectSVGRectElementSVGScriptElementSVGSetElementSVGStopElementSVGStringListSVGStylableSVGStyleElementSVGSVGElementSVGSwitchElementSVGSymbolElementSVGTestsSVGTextElementSVGTextPositioningElementSVGTitleElementSVGTransformSVGTransformableSVGTransformListSVGTRefElementSVGTSpanElementSVGUseElementSVGViewElementSVGVKernElement
TCPSocketTelephonyTelephonyCallTextTextDecoderTextEncoderTextMetricsTimeRangesTouchTouchEventTouchListTransitionEventTreeWalkerTypeInfo
WaveShaperNodeWeb API referenceWebGLRenderingContextWebSocketWheelEventWifiManagerWindowWorkerWorkerLocation