Google chrome onbeforeunload wrong behavior with iframe

I know it is an old question but just to help people who are coming here through Search :

The bug is fixed by now here.

Since chrome 10, the issue should be fixed.

There is a related bug though here.

So, in short if you still not able to fire "onbeforeunload" on frames, it could be due to change in the content through JavaScript like document.open document.write document.close etc.

the below code will work across all the browsers

if (typeof window.addEventListener != 'undefined') {    window.addEventListener('beforeunload', test, false);}else if (typeof document.addEventListener != 'undefined') {    document.addEventListener('beforeunload', test, false);}else if (typeof window.attachEvent != 'undefined') {    window.attachEvent('onbeforeunload', test);}else {    if (typeof window.onbeforeunload == 'function') {        window.onbeforeunload = function() {            test();        };    }    else {        window.onbeforeunload = test;    }}function test(){ alert('working');}

try this once ...

You may also try to change the iframe's url to "about:blank", e.g.:

$("#myFrameId")[0].src = "about:blank";

It forces chrome to "cleanly" close the window containted within the iframe.

Just to mention: if you want to close only your iframe but not the parent window, you have to give chrome enough time to execute the handler you've attached to 'onbeforeunload'.