HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>chained .keydown()</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 420px; }
    label { display: block; margin-bottom: 6px; font-weight: 600; }
    input { width: 100%; padding: 10px 12px; border: 2px solid #cbd5e1; border-radius: 6px; font-size: 16px; box-sizing: border-box; margin-bottom: 12px; }
    #notice { color: #6366f1; font-size: 14px; margin-bottom: 8px; display: none; }
    #result { font-family: monospace; font-size: 14px; color: #334155; }
  </style>
</head>
<body>
  <label for="target">Type here</label>
  <input type="text" id="target" placeholder="Press keys — Enter is blocked">
  <p id="notice"></p>
  <p id="result">Key code will appear here.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#target")
      .keydown(function(event) {
        if (event.which === 13) {
          event.preventDefault();
        }
        $("#notice").text("First handler: Enter blocked.").show();
      })
      .keydown(function(event) {
        $("#result").text("Second handler: key code " + event.which);
      });
  </script>
</body>
</html>

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jQuery chained .keydown(handler) handlers (Try It)