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全局事件处理器（GlobalEventHandlers )之一的 canplaythrough 属性，是处理当前元素canplaythrough 事件的事件处理器EventHandler .
当用户代理可以播放媒体资源并且可以播放至其结束而不必进一步缓冲内容时，触发canplaythrough事件。
element.oncanplaythrough = handlerFunction; var handlerFunction = element.oncanplaythrough;
GlobalEventHandlersonabortonanimationcancelonanimationendonanimationiterationonauxclickonbluroncanceloncanplay [我来译!]oncanplaythroughonchangeonclickoncloseoncontextmenuoncuechange [我来译!]ondblclickondurationchange [我来译!]onended [我来译!]onerroronfocusongotpointercaptureoninputoninvalidonkeydownonkeypressonkeyuponloadonloadeddata [我来译!]onloadedmetadata [我来译!]onloadendonloadstartonlostpointercaptureonmousedownonmouseenteronmouseleaveonmousemoveonmouseoutonmouseoveronmouseuponpause [我来译!]onplay [我来译!]onpointercancelonpointerdownonpointerenteronpointerleaveonpointermoveonpointeroutonpointeroveronpointeruponresetonresizeonscrollonselectonselectionchangeonselectstartonsubmitontouchcancelontouchstartontransitioncancel [我来译!]ontransitionendonwheelabortDOMContentLoadedafterprintafterscriptexecutebeforeprintbeforescriptexecutebeforeunloadblurcancelchangeclickcloseconnectcontextmenuerrorfocushashchangeinputinvalidlanguagechangeloadloadendloadstartmessageofflineonlineopenpagehidepageshowpopstateprogressreadystatechangeresetselectshowsortstoragesubmittoggleunloadloadeddataloadedmetadatacanplayplayingplaycanplaythroughseekedseekingstalledsuspendtimeupdatevolumechangewaitingdurationchangeemptiedunhandledrejectionrejectionhandledBeforeUnloadEventDOMStringMapErrorEventHTMLAnchorElementHTMLAreaElementHTMLAudioElementHTMLBRElementHTMLBaseElementHTMLBaseFontElementHTMLBodyElementHTMLButtonElementHTMLCanvasElementHTMLContentElementHTMLDListElementHTMLDataElementHTMLDataListElementHTMLDialogElementHTMLDivElementHTMLDocumentHTMLElementHTMLEmbedElementHTMLFieldSetElementHTMLFormControlsCollectionHTMLFormElementHTMLFrameSetElementHTMLHRElementHTMLHeadElementHTMLHeadingElementHTMLHtmlElementHTMLIFrameElementHTMLImageElementHTMLInputElementHTMLIsIndexElementHTMLKeygenElementHTMLLIElementHTMLLabelElementHTMLLegendElementHTMLLinkElementHTMLMapElementHTMLMediaElementHTMLMetaElementHTMLMeterElementHTMLModElementHTMLOListElementHTMLObjectElementHTMLOptGroupElementHTMLOptionElementHTMLOptionsCollectionHTMLOutputElementHTMLParagraphElementHTMLParamElementHTMLPictureElementHTMLPreElementHTMLProgressElementHTMLQuoteElementHTMLScriptElementHTMLSelectElementHTMLShadowElementHTMLSourceElementHTMLSpanElementHTMLStyleElementHTMLTableCaptionElementHTMLTableCellElementHTMLTableColElementHTMLTableDataCellElementHTMLTableElementHTMLTableHeaderCellElementHTMLTableRowElementHTMLTableSectionElementHTMLTemplateElementHTMLTextAreaElementHTMLTimeElementHTMLTitleElementHTMLTrackElementHTMLUListElementHTMLUnknownElementHTMLVideoElementHashChangeEventHistoryImageDataLocationMessageChannelMessageEventMessagePortNavigatorNavigatorGeolocationNavigatorIDNavigatorLanguageNavigatorOnLineNavigatorPluginsPageTransitionEventPluginPluginArrayPopStateEventPortCollectionPromiseRejectionEventRadioNodeListTransferableValidityStateWindowWindowBase64WindowEventHandlersWindowTimers