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

Question

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.

Lusterware

Where are you seeing this? Is this a page you wrote? If so, can you post some relevant code? – Deflect

window.,onBeforeunload=null is invalid syntax btw. Probably just a typo in your post, but if you ask a question, please take the time to make sure that the information you provide is correct. – Watercraft

how is beforeunload working Opera at all? – Retrogress

Answer 1

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.

Harmonium

$attrs = array('onchange' => 'javascript:this.form.submit();window.onbeforeunload=null;onUnload=null'); $mform->addElement('select', 'teacher', 'Teachers', $result, $attrs); – Assimilate

Answer 2

Using jQuery

$(window).off('beforeunload'); // tested in IE 11 and Chrome 62

Bookman

I was unsuccessful using the accepted answer, and jQuery was already available on the page. – Bookman

Answer 3

Clear my browsing history, seemed to help.

Maymaya