forkeado de rebillar/site-accueil-insa
53 líneas
1,7 KiB
JavaScript
53 líneas
1,7 KiB
JavaScript
// Add Page Visibility API support to old browsers by focus/blur hack.
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//
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// Include this script _before_ Visibility.js.
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//
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// Note, that this hack doesn’t correctly emulate Page Visibility API:
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// when user change focus from browser to another window (browser and your
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// page may stay visible), this hack will decide, that you page is hidden.
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//
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// For Firefox 5–9 it will be better to use MozVisibility hack without
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// this issue. See <https://github.com/private-face/mozvisibility>.
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;(function (document) {
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if ( document.visibilityState || document.webkitVisibilityState ) {
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return;
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}
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document.hidden = false;
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document.visibilityState = 'visible';
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var event = null
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var i = 0
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var fireEvent = function () {
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if( document.createEvent ) {
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if ( !event ) {
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event = document.createEvent('HTMLEvents');
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event.initEvent('visibilitychange', true, true);
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}
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document.dispatchEvent(event);
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} else {
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if ( typeof(Visibility) == 'object' ) {
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Visibility._change.call(Visibility, { });
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}
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}
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}
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var onFocus = function () {
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document.hidden = false;
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document.visibilityState = 'visible';
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fireEvent();
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};
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var onBlur = function () {
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document.hidden = true;
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document.visibilityState = 'hidden';
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fireEvent();
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}
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if ( document.addEventListener ) {
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window.addEventListener('focus', onFocus, true);
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window.addEventListener('blur', onBlur, true);
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} else {
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document.attachEvent('onfocusin', onFocus);
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document.attachEvent('onfocusout', onBlur);
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}
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})(document);
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