HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>keyup which counter</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 480px; }
    fieldset { margin-bottom: 1em; border: 1px solid #cbd5e1; border-radius: 6px; padding: 12px; }
    input { display: block; width: 100%; padding: 8px 10px; margin-bottom: 8px; box-sizing: border-box; }
    button { padding: 8px 14px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
    #log { margin-top: 12px; font-family: monospace; font-size: 13px; color: #334155; }
    #log div { padding: 4px 0; border-bottom: 1px solid #e2e8f0; }
  </style>
</head>
<body>
  <fieldset>
    <legend>Type Something</legend>
    <input type="text" id="target" placeholder="Press and release keys">
    <button type="button" id="other">Trigger the handler</button>
  </fieldset>
  <div id="log"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var xTriggered = 0;
    $("#target").on("keyup", function(event) {
      xTriggered++;
      var msg = "Handler for keyup called " + xTriggered + " time(s).";
      $("#log").prepend("<div>" + msg + " Key: " + event.which + "</div>");
    }).on("keydown", function(event) {
      if (event.which == 13) {
        event.preventDefault();
      }
    });
    $("#other").on("click", function() {
      $("#target").trigger("keyup");
    });
  </script>
</body>
</html>

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jQuery keyup — counter, event.which, keydown Enter block (Try It)