HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>ajaxSend global false</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 540px; }
    button { display: block; margin-bottom: 10px; padding: 8px 14px; cursor: pointer; border-radius: 6px; border: 1px solid #cbd5e1; background: #fff; text-align: left; }
    #log { margin-top: 12px; padding: 12px; background: #fef3c7; border-radius: 6px; font-size: 14px; line-height: 1.6; }
    .hint { color: #64748b; font-size: 13px; margin-top: 8px; }
  </style>
</head>
<body>
  <button type="button" id="global-btn">Global request (ajaxSend fires)</button>
  <button type="button" id="private-btn">Private request (global: false — no ajaxSend)</button>
  <div id="log">ajaxSend log: (none yet)</div>
  <p class="hint">Private request still runs its own beforeSend callback.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var sendCount = 0;

    $(document).on("ajaxSend", function() {
      sendCount++;
      $("#log").append(" ajaxSend (" + sendCount + ")");
    });

    $("#global-btn").on("click", function() {
      $.get("https://jsonplaceholder.typicode.com/posts/1");
    });

    $("#private-btn").on("click", function() {
      $.ajax({
        url: "https://jsonplaceholder.typicode.com/posts/2",
        global: false,
        beforeSend: function() {
          $("#log").append(" [private beforeSend]");
        }
      });
    });
  </script>
</body>
</html>

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jQuery ajaxSend — global: false (Try It)