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How to capture the browser close event in web applications?

When the web application is running and closes the browser window, what event is called?

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onunload is an event that fires when the browser window is closed.



More than ever, this event is never triggered only when the browser is closed, this is just one case.

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The web browser does not send notifications to the web server when the user approaches the window.



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You may also be interested in onbeforeunload .

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Check out my answer on the topic noted by Diodeus: Basically you can't ... Many browsers no longer fire onbeforeunload and / or onunload. And even when it does, it is difficult to distinguish between page reloading, page switching and browser / window / tab closing.

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