HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>clone vs move</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 520px; }
    .box { border: 2px dashed #94a3b8; border-radius: 8px; padding: 12px; margin: 10px 0; min-height: 48px; }
    .hello { background: #fef08a; padding: 8px 10px; border-radius: 4px; display: inline-block; }
    .goodbye { background: #dcfce7; }
    button { margin: 6px 6px 0 0; padding: 10px 14px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
    button.secondary { background: #0f766e; }
    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }
  </style>
</head>
<body>
  <div class="box" id="source">
    <div class="hello">Hello</div>
  </div>
  <div class="box goodbye">
    <strong>Goodbye</strong>
  </div>
  <button type="button" id="move">Move with appendTo</button>
  <button type="button" id="copy" class="secondary">Clone then appendTo</button>
  <button type="button" id="reset">Reset</button>
  <p id="hint">Try Move (original leaves source) vs Clone (both keep Hello).</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    function resetDemo() {
      $("#source").html('<div class="hello">Hello</div>');
      $(".goodbye").html("<strong>Goodbye</strong>");
      $("#hint").text("Demo reset. Try Move vs Clone again.");
    }
    $("#move").on("click", function () {
      resetDemo();
      $(".hello").appendTo(".goodbye");
      $("#hint").text("Moved: Hello is only under Goodbye now.");
    });
    $("#copy").on("click", function () {
      resetDemo();
      $(".hello").clone().appendTo(".goodbye");
      $("#hint").text("Cloned: Hello appears in both boxes.");
    });
    $("#reset").on("click", resetDemo);
  </script>
</body>
</html>

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jQuery .clone() — clone vs move (Try It)