logout when window closed using javascript

Question

I have used window.onbeforeunload on my javascript codes, but apparently it only works for FireFox:

    <script type="text/javascript">
    window.onbeforeunload = function (e) {
       location.href="admin.jsp?action=logout";
    };
    </script>

I need this to close at least 5 renowned browsers (firefox,IE,opera,safari,and chrome). Can anyone help me out?

jquery or plain javascript? – ThiefMaster Dec 09 '12 at 01:04 — ThiefMaster, Dec 09 '12 at 01:04
Maybe try use location.replace('admin.jsp?action=logout'); – Bartłomiej Szałach Dec 09 '12 at 01:05 — Bartłomiej Szałach, Dec 09 '12 at 01:05

score 7 · Accepted Answer · answered Dec 09 '12 at 01:05

7

Use a synchronous XHR to do this, and use the unload event instead of onbeforeunload:

window.addEventListener('unload', function() {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', 'admin.jsp?action=logout', false);
    xhr.send(null);
}, false);

answered Dec 09 '12 at 01:05

ThiefMaster

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I don't know that all browsers will allow that. [See this question](http://stackoverflow.com/questions/7560532/what-can-i-put-in-beforeunload); I'm looking for more "real" documentation. – Pointy Dec 09 '12 at 01:06
I think it should work in all browsers. The unload shouldn't happen until the unload events have been finished - and the handler doesn't even return until the xhr has finished. – ThiefMaster Dec 09 '12 at 01:07
@ThiefMaster: Well, I tried your code but apparently it didn't really work as expected since when i look into database, the user is still there. But indeed, it updates the database when user re-login. It's different from my previous code, it really deletes from database completely. Any suggestion? – Doni Andri Cahyono Dec 09 '12 at 01:18

logout when window closed using javascript

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