Created
February 2, 2015 21:55
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| var hidden | |
| , visibilityChange | |
| // browser prefixes | |
| if (typeof document.hidden !== "undefined") { // Opera 12.10 and Firefox 18 and later support | |
| hidden = "hidden" | |
| visibilityChange = "visibilitychange" | |
| } else if (typeof document.mozHidden !== "undefined") { | |
| hidden = "mozHidden" | |
| visibilityChange = "mozvisibilitychange" | |
| } else if (typeof document.msHidden !== "undefined") { | |
| hidden = "msHidden" | |
| visibilityChange = "msvisibilitychange" | |
| } else if (typeof document.webkitHidden !== "undefined") { | |
| hidden = "webkitHidden" | |
| visibilityChange = "webkitvisibilitychange" | |
| } | |
| function handleVisibilityChange() { | |
| if (document[hidden]) { | |
| } else { | |
| } | |
| } | |
| if (typeof document.addEventListener === "undefined" || typeof document[hidden] === "undefined"){ | |
| document.addEventListener(visibilityChange, handleVisibilityChange, false) | |
| } | |
| } |
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mdn