window.unload() won't work in jQuery

Question

I'm trying to alert something out after closing page.

A simple window.unload example as below :

HTML

<html>
<body>
  <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
  <script src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
  <script src="test.js" type="text/javascript">
</html>

test.js

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

P.S :

I have tried javascript too, but doesn't alert anything out !

test.js

window.onunload = function() {
    alert("Bye now!");
};

possible duplicate of [javascript to check when the browser window is close](http://stackoverflow.com/questions/805463/javascript-to-check-when-the-browser-window-is-close) — Quentin, Jul 22 '13 at 14:34

RichieHindle · Accepted Answer · 2013-07-22T14:47:07.210

23

Most browsers prevent alert in unload. The best you can do is to use an onbeforeunload handler that returns a string - the browser will show that string to the user:

window.onbeforeunload = function() {
    return "Bye now!";
};

Demo here.

edited Jul 22 '13 at 14:47

answered Jul 22 '13 at 14:34

RichieHindle

272,464
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Thank You. `onbeforeunload` working like a charm. But just on FireFox !!! doesn't work on Chrome!!! – Hamed Kamrava Jul 22 '13 at 14:41
1

@HamedKamrava: Are you returning the string, rather than calling `alert`? See my updated answer and the linked demo. – RichieHindle Jul 22 '13 at 14:48
It Working like a charm :). tnx – Hamed Kamrava Jul 22 '13 at 14:49

Tom Metcalfe · Answer 2 · 2013-07-22T14:48:04.830

1

What browser are you testing this code in ?

If you check the following link from W3School, Opera and Chrome do not support it. LINK

And a working example for onbeforeunload is to use jquery as following :

    $(window).on('beforeunload', function() {
           // Do stuff
    });

(I was going to comment this last bit on the above post but I cannot yet comment :'( )

edited Jul 22 '13 at 14:48

answered Jul 22 '13 at 14:37

Tom Metcalfe

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score 0 · Answer 3 · answered Jul 22 '13 at 14:35

0

Use body or document instead of window.

answered Jul 22 '13 at 14:35

Pieter

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window.unload() won't work in jQuery

3 Answers3

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