HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>unload bind demo</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 480px; }

    button { margin: 6px 6px 6px 0; padding: 10px 16px; cursor: pointer; background: #6366f1; color: #fff; border: none; border-radius: 6px; }

    #log { margin-top: 12px; padding: 12px; background: #f1f5f9; border-radius: 6px; min-height: 48px; font-size: 14px; }

    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }

    .badge { display: inline-block; background: #fef08a; padding: 4px 8px; border-radius: 4px; font-size: 12px; margin-bottom: 8px; }

  </style>

</head>

<body>

  <div class="badge">jQuery 2.2.4 — .unload() exists</div>

  <button type="button" id="simulate">Simulate page unload</button>

  <div id="log">Waiting...</div>

  <p id="hint">Real unload fires on navigation; we use .trigger("unload") to demo.</p>

  <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>

  <script>

    $(window).unload(function() {

      var ts = new Date().toLocaleTimeString();

      $("#log").text("Unload handler ran at " + ts);

      sessionStorage.setItem("unloadDemo", ts);

    });

    $("#simulate").on("click", function() {

      $(window).trigger("unload");

      $("#hint").text("Triggered unload — check #log. sessionStorage key: unloadDemo");

    });

  </script>

</body>

</html>

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jQuery .unload() — bind handler (Try It)