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HTML Audio/Video DOM durationchange Event

❮ HTML Audio/Video DOM Reference


Alert that the duration of the video has changed:

var vid = document.getElementById("myVideo");
vid.ondurationchange = function() {
    alert("The video duration has changed");
Try it Yourself »

More "Try it Yourself" examples below.

Definition and Usage

The durationchange event occurs when the duration data of the specified audio/video is changed.

Note: When an audio/video is loaded, the duration will change from "NaN" to the actual duration of the audio/video.

During the loading process of an audio/video, the following events occur, in this order:

  1. loadstart
  2. durationchange
  3. loadedmetadata
  4. loadeddata
  5. progress
  6. canplay
  7. canplaythrough

Browser Support

The numbers in the table specify the first browser version that fully supports the event.

durationchange Yes 9.0 Yes Yes Yes



<audio|video ondurationchange="myScript">Try it

In JavaScript:

audio|video.ondurationchange=function(){myScript};Try it

In JavaScript, using the addEventListener() method:

audio|video.addEventListener("durationchange", myScript);Try it

Technical Details

Supported HTML tags: <audio> and <video>
Supported JavaScript objects: Audio, Video

More Examples


Alert that the duration of the audio has changed:

var aud = document.getElementById("myAudio");
aud.ondurationchange = function() {
    alert("The audio duration has changed");
Try it Yourself »

❮ HTML Audio/Video DOM Reference