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The Web Audio API OfflineAudioCompletionEvent interface represents events that occur when the processing of an OfflineAudioContext is terminated. The complete event implements this interface.

Note: This interface is marked as deprecated; it is still supported for legacy reasons, but it will soon be superseded when the promise version of OfflineAudioContext.startRendering is supported in browsers, which will no longer need it.


Creates a new OfflineAudioCompletionEvent object instance.


Also inherits properties from its parent, Event.

OfflineAudioCompletionEvent.renderedBuffer Read only
An AudioBuffer containing the result of processing an OfflineAudioContext.


Inherits methods from its parent, Event.


Specification Status Comment
Web Audio API
The definition of 'OfflineAudioCompletionEvent' in that specification.
Working Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support14 Yes25 No156
OfflineAudioCompletionEvent() constructor551 ?53 No42 ?
renderedBuffer14 Yes25 No156
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support1414 Yes26 No15 ?
OfflineAudioCompletionEvent() constructor551551 ?53 No42 ?
renderedBuffer Yes14 Yes26 No15 ?

1. Before Chrome 59, the default values were not supported.

See also

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, abbycar, kscarfone, teoli
 Last updated by: fscholz,