HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>ajaxStop loading pair</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; }
    #loading {
      display: none; margin-top: 14px; padding: 14px; background: #dbeafe;
      border-radius: 8px; text-align: center; font-size: 14px;
    }
    #loading.is-visible { display: block; }
  </style>
</head>
<body>
  <button type="button" id="run-two">Run two parallel $.get()</button>
  <div id="loading">Loading...</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $(document).on("ajaxStart", function() {
      $("#loading").addClass("is-visible");
    });
    $(document).on("ajaxStop", function() {
      $("#loading").removeClass("is-visible");
    });
    $("#run-two").on("click", function() {
      $.get("https://jsonplaceholder.typicode.com/posts/1");
      $.get("https://jsonplaceholder.typicode.com/posts/2");
    });
  </script>
</body>
</html>

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jQuery ajaxStart + ajaxStop — loading UI pair (Try It)