The HTMLMediaElement.buffered read-only property returns a new TimeRanges object that indicates the ranges of the media source that the browser has buffered (if any) at the moment the buffered property is accessed.

Note: This feature is not available in Web Workers.


var timeRange = audioObject.buffered


A TimeRanges object. This object is normalized, which means that ranges are ordered, don't overlap, aren't empty, and don't touch (adjacent ranges are folded into one bigger range).


var obj = document.createElement('video');
console.log(obj.buffered); // TimeRanges { length: 0 }


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes49 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: wbamberg, fscholz, erikadoyle, thiagopnts, teoli, markg
Last updated by: wbamberg,