HTMLMediaElement: durationchange event

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.');
};

• The HTMLMediaElement playing event
• The HTMLMediaElement waiting event
• The HTMLMediaElement seeking event
• The HTMLMediaElement seeked event
• The HTMLMediaElement ended event
• The HTMLMediaElement loadedmetadata event
• The HTMLMediaElement loadeddata event
• The HTMLMediaElement canplay event
• The HTMLMediaElement canplaythrough event
• The HTMLMediaElement durationchange event
• The HTMLMediaElement timeupdate event
• The HTMLMediaElement play event
• The HTMLMediaElement pause event
• The HTMLMediaElement ratechange event
• The HTMLMediaElement volumechange event
• The HTMLMediaElement suspend event
• The HTMLMediaElement emptied event
• The HTMLMediaElement stalled event

• HTMLAudioElement
• HTMLVideoElement
• <audio>
• <video>