HTML | DOM onratechange Event

The DOM onratechange event occurs if the playing speed of the audio/video is changed. The playbackRate property is used to sets or returns the current playback speed of an audio/video.

Syntax:

  • In HTML:
    <element onratechange="myScript">
  • In JavaScript:
    object.onratechange = function(){myScript};
  • In JavaScript, using the addEventListener() method:
    object.addEventListener("ratechange", myScript);

Example: Using the addEventListener() method



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<!DOCTYPE html>
<html>
  
<head>
    <title>
        HTML DOM onratechange Event
    </title>
</head>
  
<body>
    <center>
        <h1 style="color:green">
          GeeksforGeks
      </h1>
        <h2>HTML DOM onratechange Event</h2>
  
        <video id="vidID" 
               width="400" height="400" 
               autoplay controls>
            <source src=
                    type="video/mp4">
        </video>
        <br>
  
        <button onclick="speed()" type="button">
          Slow motion
      </button>
  
        <script>
            // Get the video element with id="myVideo"
            var x = document.getElementById("vidID");
  
            function speed() {
                x.playbackRate = 0.5;
            }
  
            x.addEventListener("ratechange", GFGfun);
  
            function GFGfun() {
                alert("Playing speed changed");
            }
        </script>
    </center>
</body>
  
</html>

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Output:

  • Before:
  • After:

Supported Browsers: The browsers supported by DOM onratechange Event are listed below:

  • Google Chrome
  • Internet Explorer
  • Firefox
  • Apple Safari
  • Opera


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