EncodedAudioChunk: type property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Note: This feature is available in Dedicated Web Workers.

The type read-only property of the EncodedAudioChunk interface returns a value indicating whether the audio chunk is a key chunk, which does not relying on other frames for decoding.


A string, one of:


The data is a key chunk.


The data is not a key chunk.


In the following example the type is printed to the console.

const init = {
  type: "key",
  data: audioBuffer,
  timestamp: 23000000,
  duration: 2000000,
chunk = EncodedAudioChunk(init);

console.log(chunk.type); //"key"


# dom-encodedaudiochunk-type

Browser compatibility

BCD tables only load in the browser