HTML Audio/Video DOM loadedmetadata Event

Alert when metadata for the video is loaded:

let vid = document.getElementById("myVideo");
vid.onloadedmetadata = function() {
alert("Metadata for video loaded");
};

More "Try it Yourself" examples below.

Definition and Usage

The loadedmetadata event occurs when metadata for the specified audio/video has been loaded.

Metadata for audio/video consists of: duration, dimensions (video only) and text tracks.

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

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

Event
loadedmetadata	Yes	9.0	Yes	Yes	Yes

In HTML:

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

In JavaScript:

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

In JavaScript, using the addEventListener() method:

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

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

Alert when metadata for the audio is loaded:

let aud = document.getElementById("myAudio");
aud.onloadedmetadata = function() {
alert("Metadata for audio loaded");
};