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Editorial Team
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Asked: 2026-05-18T04:14:25+00:00

I was reading this article in google-chrome and when I moved mouse to the

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I was reading this article in google-chrome and when I moved mouse to the close icon(x) on tab, web page displayed me a popup to wait, so my question is how do webpage knows I am going to close this tab, which javascript event it is?

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1 Answer

  1. Editorial Team

    It’s this script. And by using this deobfuscator. You can see its source, and I’m guessing this is what you’re looking for. 

    function handleMove(e) {
    if (e.clientY < lastY && e.clientY <= 10) {
        ActionPopup.show();
    }
    lastY = e.clientY;
}

    Script Source

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