জাভাস্ক্রিপ্ট onkeydown

<!DOCTYPE html>
<html>
<body>

<input
  onkeydown="keyDown(event)"
  placeholder="press a key">

<p id="message"></p>

<script>
function keyDown(event) {
  document.getElementById("message").innerHTML =
    "Key: " + event.key;
}
</script>

</body>
</html>