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


var myDuration = audioOrVideo.duration


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.


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


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes3.59 Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes Yes Yes Yes ?

See also

Document Tags and Contributors

Contributors to this page: fscholz, erikadoyle, markg
Last updated by: fscholz,