How can I get rid of the "Are you sure you want to leave this page" message?

javascript internet-explorer firefox opera
Ângelo Rigo picture Ângelo Rigo · Dec 20, 2012 · Viewed 24.3k times · Source

How can I get rid of the "Are you sure you want to leave this page" message?

I try to use window.onBeforeunload=null and it works for Chrome, but it did not work for Firefox, Internet Explorer and Opera.

Thanks in advance.

Answer

Teemu picture Teemu · Dec 20, 2012

I'm not sure why your script is working in Chrome, all browsers should behave in the same way with this. Is it possible, that the code block where you remove the event listener, is for some reason executed only in Chrome?

Anyway, if you set window.onbeforeunload = someFunction; you can nullify it with window.onbeforeunload = null. However, if you set window.addEventListener('beforeunload', someFunction);, this event listener can't be removed with window.onbeforeunload = null. It can be removed only with removeEventListener('beforeunload', someFunction);.

If this answer doesn't help, please post all relevant code, like the snippet when assigning event listener, and also when trying to remove it.

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