HTML5 of page visibility (with code)

This article brings the content is about the HTML5 page visibility of the Judgment (with code), there is a certain reference value, the need for a friend can refer to, I hope you have some help.

visibilitychangePage events to determine the status of the current page visibility and perform certain tasks specifically

Document.hidden

The newly-emerged document.hidden property that shows whether the page is the user's currently viewing page, with a value of ture or false.

Document.visibilitystate

visibilityStateThe value is either visible (indicates that the page is currently active tab for the browser and the window is not minimized), either (the page is not the Active hidden tab page, or the window is minimized.) ), or prerender (the page is regenerated, not visible to the user.) ).

Visibilitychange Events

Various browsers compatible with VAR hidden, state, visibilitychange; if (typeof Document.hidden!== "undefined") {     hidden = "hidden";    Visibilitychange = "Visibilitychange";     State = "Visibilitystate"; } else if (typeof Document.mozhidden!== "undefined") {     hidden = "Mozhidden";     Visibilitychange = "Mozvisibilitychange";    State = "Mozvisibilitystate"; } else if (typeof Document.mshidden!== "undefined") {     hidden = "Mshidden";     Visibilitychange = "Msvisibilitychange";    State = "Msvisibilitystate"; } else if (typeof Document.webkithidden!== "undefined") {     hidden = "Webkithidden";     Visibilitychange = "Webkitvisibilitychange";    State = "Webkitvisibilitystate"; }//Add listener, Show status change in title Document.addeventlistener (Visibilitychange, function () {     document.title = document[ State]; }, False);//Initialize document.title = Document[state];

Add Listener

Document.addeventlistener ("Visibilitychange", function () {  console.log (document.visibilitystate);}); Document.addeventlistener ("Msvisibilitychange", function () {  console.log (document.msvisibilitystate);}); Document.addeventlistener ("Mozvisibilitychange", function () {  console.log (document.mozvisibilitystate);}); Document.addeventlistener ("Webkitvisibilitychange", function () {  console.log (document.webkitvisibilitystate) ;});

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