HTMLMediaElement.duration

The HTMLMediaElement.duration property gives the length of the media in seconds, or zero if no media data is available.

Syntax

var myDuration = audioOrVideo.duration

Value

A double. If the media data is available but the length is unknown, this value is NaN. If the media is streamed and has no predefined length, the value is Inf.

Example

var obj = document.createElement('video');
console.log(obj.duration); // NaN

Specifications

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'HTMLMediaElement.duration' in that specification.	Living Standard	No change from HTML5
HTML5 The definition of 'HTMLMediaElement.duration' in that specification.	Recommendation	Initial definition.

Browser compatibility

See also

• The interface defining it, HTMLMediaElement.