HTMLMediaElement: durationchange event

{{APIRef("HTMLMediaElement")}} 

The durationchange event is fired when the duration attribute has been updated.

Syntax

Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}} , or set an event handler property.

addEventListener("durationchange", (event) => { })

ondurationchange = (event) => { }

Event type

A generic {{domxref("Event")}} .

Examples

These examples add an event listener for the HTMLMediaElement’s durationchange event, then post a message when that event handler has reacted to the event firing.

Using addEventListener():

const video = document.querySelector("video");

video.addEventListener("durationchange", (event) => {
  console.log("Not sure why, but the duration of the video has changed.");
});

Using the ondurationchange event handler property:

const video = document.querySelector("video");

video.ondurationchange = (event) => {
  console.log("Not sure why, but the duration of the video has changed.");
};

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}} 

Related Events

• The HTMLMediaElement {{domxref("HTMLMediaElement.playing_event", 'playing')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.waiting_event", 'waiting')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.seeking_event", 'seeking')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.seeked_event", 'seeked')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.ended_event", 'ended')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.loadedmetadata_event", 'loadedmetadata')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.loadeddata_event", 'loadeddata')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.canplay_event", 'canplay')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.canplaythrough_event", 'canplaythrough')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.timeupdate_event", 'timeupdate')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.play_event", 'play')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.pause_event", 'pause')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.ratechange_event", 'ratechange')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.volumechange_event", 'volumechange')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.suspend_event", 'suspend')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.emptied_event", 'emptied')}}  event
• The HTMLMediaElement {{domxref("HTMLMediaElement.stalled_event", 'stalled')}}  event

See also

• {{domxref("HTMLAudioElement")}} 
• {{domxref("HTMLVideoElement")}} 
• {{HTMLElement("audio")}} 
• {{HTMLElement("video")}}