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Can you fire an event in JavaScript before the user closes the window?

I want to send ping to my server using AJAX GET or POST, right after closing the window. Is a window.onbeforeunloadgood idea?

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Yes, you can send an AJAX request to window.onbeforeunload, but it is not guaranteed that you will receive a response before closing the browser so that you can send the request only, but not rely on reading the answer. If you need to get a response, you can send a synchronous request instead of asynchronous.

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, window.onbeforeunload 100%. - () ajax, , , 100% - :\

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