Returns the number of frames (either <frame> or <iframe> elements) in the window.
framesCount = window.length;
framesCount is the number of frames.if (window.length) {
// this is a document with subframes
}
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'Window.length' in that specification. |
Living Standard | |
| HTML5 The definition of 'Window.length' in that specification. |
Recommendation |
WindowapplicationCachecachesclosedconsolecontrollerscryptodefaultStatusdevicePixelRatiodialogArgumentsdirectoriesdocumentframeElementframesfullScreenhistoryindexedDBinnerHeightinnerWidthisSecureContextisSecureContextlengthlocalStoragelocationlocationbarmenubarmessageManagermozAnimationStartTimemozInnerScreenXmozInnerScreenYmozPaintCountnamenavigatoronabortonafterprintonanimationcancelonanimationendonanimationiterationonappinstalledonauxclickonbeforeinstallpromptonbeforeprintonbeforeunloadonbluronchangeonclickoncloseoncontextmenuondblclickondevicelightondevicemotionondeviceorientationondeviceorientationabsoluteondeviceproximityondragdroponerroronfocusongamepadconnectedongamepaddisconnectedongotpointercaptureonhashchangeoninputonkeydownonkeypressonkeyuponlanguagechangeonloadonloadendonloadstartonlostpointercaptureonmousedownonmousemoveonmouseoutonmouseoveronmouseuponmozbeforepaintonpaintonpointercancelonpointerdownonpointerenteronpointerleaveonpointermoveonpointeroutonpointeroveronpointeruponpopstateonrejectionhandledonresetonresizeonscrollonselectonselectionchangeonselectstartonstorageonsubmitontouchcancelontouchmoveontouchstartontransitioncancelontransitionendonunhandledrejectiononunloadonuserproximityonvrdisplayactivateonvrdisplaybluronvrdisplayconnectonvrdisplaydeactivateonvrdisplaydisconnectonvrdisplayfocusonvrdisplaypresentchangeonwheelopeneroriginouterHeightouterWidthparentperformancepersonalbarpkcs11screenscreenXscreenYscrollbarsscrollMaxXscrollMaxYscrollXscrollYselfsessionStoragesidebarspeechSynthesisstatusstatusbartoolbartopURLwindowalert()atob()back()blur()btoa()cancelAnimationFrame()cancelIdleCallback()captureEvents()clearImmediate()clearInterval()clearTimeout()close()confirm()convertPointFromNodeToPage()createImageBitmap()dump()eventfetch()find()focus()forward()getAttention()getComputedStyle()getDefaultComputedStyle()getSelection()home()matchMedia()minimize()moveBy()moveTo()open()openDialog()postMessage()print()prompt()releaseEvents()requestAnimationFrame()requestIdleCallback()resizeBy()resizeTo()restore()routeEvent()scroll()scrollBy()scrollByLines()scrollByPages()scrollTo()setCursor()setImmediate()setInterval()setTimeout()showModalDialog()sizeToContent()stop()updateCommands()