Can Ajax Requests in the `onbeforeunload` Event Reliably Delete Data Before Page Closure?

Ajax Execution on BeforeUnload Event

In a bid to create a PHP/JavaScript chat application, a developer encounters an issue where a MySQL row remains in a queue table even after the user closes the page. The challenge lies in deleting the row when the page is closed.

To address this, the developer attempts to use the onbeforeunload event with an Ajax call. However, this approach fails due to the asynchronous nature of Ajax requests, which the browser cannot wait for.

The solution lies in setting async: false in the Ajax configuration. However, this approach is not foolproof and may not work consistently across all browsers.

For further insights, refer to the comment at http://api.jquery.com/unload/#dsq-comment-body-132164390.

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