In Javascript how to display custom text when onbeforeunload event is fired

Asked Jan 16 '17 at 00:44

Active Jan 16 '17 at 00:44

Viewed 52 times

I want to detect if user tries to refresh the page, and my code is

window.onbeforeunload = function(e) {
    var dialogText = 'custom text.'
    e.returnValue = dialogText
    return dialogText
}

however, when user click the browser's refresh button, it always shows

from mozilla's specification:

Starting with Firefox 4, Chrome 51, Opera 38 and Safari 9.1, a generic string not under the control of the webpage will be shown instead of the returned string.

Is it possible to have custom text in the alert? seems mission impossible?

asked Jan 16 '17 at 00:44

Benjamin Li

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Check the dup I marked. In my answer there I cover all the browsers and what you can/can't do with each of them. – Dekel Jan 16 '17 at 00:47
@Dekel, my browser'version is 55.xxx, so it is not possible to do that, right? – Benjamin Li Jan 16 '17 at 00:49
And probably count on trend of other browsers removing support too. Has been such an abused feature over the years – charlietfl Jan 16 '17 at 00:49
Thats correct. BTW, will appreciate a vote on my answer there :) – Dekel Jan 16 '17 at 00:50
@Dekel, voted. thanks – Benjamin Li Jan 16 '17 at 00:52
You are welcome :) – Dekel Jan 16 '17 at 00:55

In Javascript how to display custom text when onbeforeunload event is fired

0 Answers0