HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>.ajaxStart() + $.get()</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 520px; }

    button { padding: 8px 14px; cursor: pointer; background: #2563eb; color: #fff; border: none; border-radius: 6px; }

    .log { margin-top: 14px; padding: 12px; background: #eff6ff; border-radius: 6px; font-size: 14px; }

    .hint { color: #64748b; font-size: 13px; margin-top: 8px; }

  </style>

</head>

<body>

  <button type="button" id="fetch">Fetch post #1</button>

  <div class="log">Click the button to trigger $.get().</div>

  <p class="hint">Uses deprecated .ajaxStart(handler) — migrate to .on("ajaxStart") for new code.</p>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $(document).ajaxStart(function() {

      $(".log").text("Handler ran via $(document).ajaxStart(function(){ ... }).");

    });



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

      $.get("https://jsonplaceholder.typicode.com/posts/1");

    });

  </script>

</body>

</html>

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jQuery .ajaxStart() — basic bind + $.get() (Try It)