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Execute script when HTML document is about to be unloaded?

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Release： 2023-08-20 12:09:31
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Execute script when HTML document is about to be unloaded?

The onbeforeunload event attribute is triggered when the document is ready to be unloaded.

Example

You can try running the following code to implement the onbeforeunload attribute −

<!DOCTYPE html>
<html>
   <body onbeforeunload = "return display()">
      <p>Close this window or press F5.</p>
      <script>
         function display() {
            return "Wanna stay here or leave?";
         }
      </script>
   </body>
</html>
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Related labels：
uninstall Script execution html document
source：tutorialspoint.com
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