files/en-us/web/api/offlineaudiocompletionevent/index.md
{{APIRef("Web Audio API")}}
The Web Audio API OfflineAudioCompletionEvent interface represents events that occur when the processing of an {{domxref("OfflineAudioContext")}} is terminated. The {{domxref("OfflineAudioContext/complete_event", "complete")}} event uses 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 {{domxref("OfflineAudioContext.startRendering")}} is supported in browsers, which will no longer need it.
{{InheritanceDiagram}}
OfflineAudioCompletionEvent object instance.Also inherits properties from its parent, {{domxref("Event")}}.
Inherits methods from its parent, {{domxref("Event")}}.
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