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Execute a script when the browser window is closed in HTML?

The unloaded attribute triggers when you close the web browser window. You can try to run the following code to implement unloaded attribute in HTML −

Example

<!DOCTYPE html>
<html>
   <body onunload = "display()">
      <h2>Tutorialspoint</h2>
      <h3>Simply Easy learning</h3>
      <script>
         function display() {
            alert("Bye!");
         }
      </script>
   </body>
</html>