Created
February 8, 2016 20:25
-
-
Save hawkrobe/2c68ce333baa49b446c4 to your computer and use it in GitHub Desktop.
keep track of whether user has switched tabs...
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var visible = "visible"; | |
| // Automatically registers whether user has switched tabs... | |
| (function() { | |
| document.hidden = hidden = "hidden"; | |
| // Standards: | |
| if (hidden in document) { | |
| document.addEventListener("visibilitychange", onchange); | |
| } else if ((hidden = "mozHidden") in document) { | |
| document.addEventListener("mozvisibilitychange", onchange); | |
| } else if ((hidden = "webkitHidden") in document) { | |
| document.addEventListener("webkitvisibilitychange", onchange); | |
| } else if ((hidden = "msHidden") in document) { | |
| document.addEventListener("msvisibilitychange", onchange); | |
| // IE 9 and lower: | |
| } else if ('onfocusin' in document) { | |
| document.onfocusin = document.onfocusout = onchange; | |
| // All others: | |
| } else { | |
| window.onpageshow = window.onpagehide = window.onfocus = window.onblur = onchange; | |
| } | |
| })(); | |
| function onchange (evt) { | |
| var v = 'visible', h = 'hidden', | |
| evtMap = { | |
| focus:v, focusin:v, pageshow:v, blur:h, focusout:h, pagehide:h | |
| }; | |
| evt = evt || window.event; | |
| if (evt.type in evtMap) { | |
| document.body.className = evtMap[evt.type]; | |
| } else { | |
| document.body.className = evt.target.hidden ? "hidden" : "visible"; | |
| } | |
| visible = document.body.className; | |
| game.socket.send("h." + document.body.className); | |
| }; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment