জাভাস্ক্রিপ্ট onratechange

<!DOCTYPE html>
<html>
<body>

<video
  controls
  onratechange="rateChanged(this)"
  width="300"
  src="/videos/rain.mp4">
</video>

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

<script>
function rateChanged(video) {
  document.getElementById("message").innerHTML =
    "Rate: " + video.playbackRate;
}
</script>

</body>
</html>