HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>Input throttle with timeStamp</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 28rem; }

    input { width: 100%; padding: 8px; box-sizing: border-box; }

    #status { margin-top: 12px; padding: 12px; background: #f1f5f9; border-radius: 6px; font-size: 13px; }

  </style>

</head>

<body>

  <label>Type quickly (hold a key): <input type="text" id="search" placeholder="Search…"></label>

  <div id="status">Handled keys appear here (max one per 200 ms).</div>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    var lastKey = 0;

    $("#search").on("keydown", function (event) {

      if (event.timeStamp - lastKey < 200) {

        return;

      }

      lastKey = event.timeStamp;

      $("#status").text("Handled key at " + Math.round(lastKey));

    });

  </script>

</body>

</html>

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jQuery event.timeStamp — keydown throttle (Try It)