How to trigger a javascript alert when user close browser tab / browser?

Question

How can i trigger a javascript alert when user close browser tab / browser in all web browser ( chrome / Firefox )

catch `onbeforeunload` event. https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload — Suresh Atta, Dec 26 '17 at 06:03
https://stackoverflow.com/questions/3888902/detect-browser-or-tab-closing — zabusa, Dec 26 '17 at 06:04

Rohit Agrawal · Answer 1 · 2017-12-26T06:11:09.357

1

You can use onbeforeunload event on window object.

you can go through this answer for browser compatability.

window.onbeforeunload = function(e) {
       return 'Close Tab?';
    };

edited Dec 26 '17 at 06:11

answered Dec 26 '17 at 06:04

Rohit Agrawal

the above script doesn't work on my firefox as many stackoverflow answers pointed out this one is there any clear example you can share – muthukrishnan91 Dec 26 '17 at 06:09
updated my answer – Rohit Agrawal Dec 26 '17 at 06:11

score -1 · Answer 2 · answered Dec 26 '17 at 06:05

-1

Handle onunload & onbeforeunload events and call alert in the event handling function

answered Dec 26 '17 at 06:05

Chandre Gowda

can you share an example as i am learning javascript – muthukrishnan91 Dec 26 '17 at 06:08

2 Answers2