Własność hasFocus zwraca wartość true, jeżeli fokus jest zlokalizowany w dowolnym miejscu danego dokumentu.
focused = document.hasFocus();
DocumentalinkColoranchorsappletsasync [Translate]bgColorbodycharacterSetchildElementCount [Translate]children [Translate]compatModecontentType [Translate]currentScript [Translate]defaultViewdesignMode [Translate]dir [Translate]doctypedocumentElementdocumentURI [Translate]documentURIObject [Translate]domaindomConfig [Translate]embedsfgColorfirstElementChild [Translate]formsfullscreen [Translate]fullscreenEnabled [Translate]headheighthidden [Translate]imagesimplementationlastElementChild [Translate]lastModifiedlastStyleSheetSet [Translate]linkColorlinkslocationmozSyntheticDocument [Translate]onabort [Translate]onafterscriptexecute [Translate]onanimationcancel [Translate]onanimationend [Translate]onanimationiteration [Translate]onauxclick [Translate]onbeforescriptexecute [Translate]onblur [Translate]oncancel [Translate]oncanplay [Translate]oncanplaythrough [Translate]onchange [Translate]onclickonclose [Translate]oncontextmenu [Translate]oncuechange [Translate]ondblclick [Translate]ondurationchange [Translate]onended [Translate]onerror [Translate]onfocus [Translate]onfullscreenchange [Translate]onfullscreenerror [Translate]ongotpointercapture [Translate]oninput [Translate]oninvalid [Translate]onkeydownonkeypressonkeyuponloadonloadeddata [Translate]onloadedmetadata [Translate]onloadend [Translate]onloadstart [Translate]onlostpointercapture [Translate]onmousedownonmouseenter [Translate]onmouseleave [Translate]onmousemoveonmouseout [Translate]onmouseover [Translate]onmouseup [Translate]onoffline [Translate]ononline [Translate]onpause [Translate]onplay [Translate]onpointercancel [Translate]onpointerdown [Translate]onpointerenter [Translate]onpointerleave [Translate]onpointermove [Translate]onpointerout [Translate]onpointerover [Translate]onpointerup [Translate]onreset [Translate]onresize [Translate]onscroll [Translate]onselect [Translate]onselectionchange [Translate]onselectionchange [Translate]onselectstart [Translate]onsubmit [Translate]ontouchcancel [Translate]ontouchstart [Translate]ontransitioncancel [Translate]ontransitionend [Translate]onvisibilitychange [Translate]onwheel [Translate]origin [Translate]pluginspolicy [Translate]popupNode [Translate]preferredStyleSheetSet [Translate]readyState [Translate]referrerscripts [Translate]scrollingElement [Translate]selectedStyleSheetSet [Translate]styleSheetSets [Translate]timeline [Translate]titletooltipNode [Translate]URLvisibilityState [Translate]vlinkColorwidthxmlEncoding [Translate]xmlVersion [Translate]adoptNode() [Translate]append() [Translate]caretRangeFromPoint() [Translate]clearclosecreateAttributecreateCDATASection() [Translate]createComment() [Translate]createDocumentFragmentcreateElementcreateElementNS() [Translate]createEntityReference() [Translate]createEventcreateExpression() [Translate]createExpression() [Translate]createNodeIterator() [Translate]createNSResolver() [Translate]createNSResolver() [Translate]createProcessingInstruction() [Translate]createRangecreateTextNodecreateTouch() [Translate]createTouchList() [Translate]createTreeWalker() [Translate]enableStyleSheetsForSet() [Translate]evaluate() [Translate]evaluate() [Translate]execCommand()exitFullscreen() [Translate]exitPointerLock() [Translate]getAnimations() [Translate]getBoxObjectFor() [Translate]getElementByIdgetElementsByClassName()getElementsByNamegetElementsByTagNamegetElementsByTagNameNS() [Translate]hasFocushasStorageAccess() [Translate]importNodemozSetImageElement() [Translate]openprepend() [Translate]queryCommandEnabled() [Translate]queryCommandSupported() [Translate]querySelector() [Translate]querySelector()querySelectorAll() [Translate]querySelectorAll() [Translate]registerElement() [Translate]releaseCapture()requestStorageAccess() [Translate]writewriteln