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

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support YesEdge Full support YesFirefox Full support 4IE Full support 9Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

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