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Is there a way to determine that the browser window was closed?

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感动是毒
感动是毒 2021-01-14 12:35

How is it possible to identify that the browser\'s close button was clicked?

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  • 甜味超标
    2021-01-14 13:15

    would this :

    $(window).unload( function () { alert("Bye now!"); } );

    help you ?

    It is in jQuery though.

    you should check the link given by Demoli though, it has further information about this particular method ( and its downside ).

    edit : added link.

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  • 北海茫月
    2021-01-14 13:22

    You should use onbeforeunload, not onunload. IE 7 (and perhaps other browsers) are not 100% reliable when it comes to firing the unload event, but it seems to always fire the beforeunload event.

    for example:

    window.onbeforeunload=function(){}

    or, if you are using prototype.js:

    Event.observe(window, 'beforeunload', function(){});
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  • 难免孤独
    2021-01-14 13:27

    From the JavaScript Event Reference, the closest match appears to be the OnUnload event. However, this also catches navigation away from the page (and thus you don't want the functions to run if the user actually clicks on a link.)

    There is no guarantee that the server will receive the message that the browser window is closed. For example, the older method that involved creating a small pop-up window would be blocked by most modern browsers. Using AJAX might work, but a browser window may close before it attempts to connect.

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  • 忘掉有多难
    2021-01-14 13:29

    I agree with northsouthwhat, but be aware that onbeforeunload may not be supported in all the browsers you might want to use it in.

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  • 暖寄归人
    2021-01-14 13:33

    This is a hack but it seems to work for me. It might be IE specific as well. I code for an IE only environment.

    <body onunload="if(self.screenTop>9000){unloadFunction();}">

    Edited to add that my unloadFunction opens a popup window that kills the user's session. You can't do anything on the page that was closed itself. 'cause it's closed already! ;)

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  • 被撕碎了的回忆
    2021-01-14 13:37

    you could setup an ajax call that periodically polls your server every few seconds to every few minutes (depending on your wanted time precision) and track the last hit time server side. not completely accurate (eg. network issues could cause a false positive), but may be an option depending on your requirements.

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