HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>multi select selected</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    select { min-width: 160px; }
    #out { margin-top: 12px; padding: 12px; background: #fef3c7; border: 1px solid #f59e0b; }
    p { color: #64748b; font-size: 14px; }
  </style>
</head>
<body>
  <p>Hold Ctrl (Cmd on Mac) to pick multiple.</p>
  <select id="tags" multiple size="4">
    <option value="js">JavaScript</option>
    <option value="css">CSS</option>
    <option value="html">HTML</option>
    <option value="jq">jQuery</option>
  </select>
  <div id="out"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#tags").on("change", function() {
      var picked = [];
      $("#tags option:selected").each(function() {
        picked.push($(this).val());
      });
      $("#out").text(picked.join(", ") || "(none selected)");
    });
  </script>
</body>
</html>

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