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Home/ Questions/Q 7848941
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Editorial Team
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Editorial Team
Asked: June 2, 20262026-06-02T18:22:43+00:00 2026-06-02T18:22:43+00:00

How to ask confirmation from user before he leaves the page as in gmail?

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How to ask confirmation from user before he leaves the page as in gmail?

I searched for this question in various places, but all that they mention is the use of javascript window.unload & window.onbeforeunload. Also it doesn’t work in chrome most of the times as it gets blocked.

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  1. Editorial Team
    Editorial Team
    2026-06-02T18:22:44+00:00Added an answer on June 2, 2026 at 6:22 pm

    Try this:

    <script>
    window.onbeforeunload = function (e) {
        e = e || window.event;
    
        // For IE and Firefox prior to version 4
        if (e) {
            e.returnValue = 'Sure?';
        }
    
        // For Safari
        return 'Sure?';
    };
    </script>
    

    Here is a working jsFiddle

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