x
<html> <body> <h1>HTML DOM Events</h1><h2>The ondurationchange Event</h2><p>Use the addEventListener() method to attach a "durationchange" event to a video element.</p><video controls id="myVideo"> <source src="mov_bbb.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> Your browser does not support video playback.</video><p>Video courtesy of <a href="https://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p><script>document.getElementById("myVideo").addEventListener("durationchange", myFunction);function myFunction() { document.getElementById("demo").innerHTML += "Duration has changed";}</script></body> </html>