AudioEncoder: dequeue event

Limited availability

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

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Dedicated Web Workers.

The dequeue event of the AudioEncoder interface fires to signal a decrease in AudioEncoder.encodeQueueSize.

This eliminates the need for developers to use a setTimeout() poll to determine when the queue has decreased, and more work should be queued up.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

js
addEventListener("dequeue", (event) => { })

ondequeue = (event) => { }

Example

js
audioEncoder.addEventListener("dequeue", (event) => {
  // Queue up more encoding work
});

Specifications

Specification
WebCodecs
# eventdef-audioencoder-dequeue

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
dequeue event
Chrome – Full support
Chrome 106 (Release date: 2022-09-27)
footnote Full support
Edge – Full support
Edge 106 (Release date: 2022-10-03)
footnote Full support
Firefox – Full support
Firefox 130 (Release date: 2024-09-03)
footnote Full support
Opera – Full support
Opera 92 (Release date: 2022-10-19)
footnote Full support
Safari – Full support
Safari 26 (Release date: 2025-09-15)
footnote Full support
Chrome Android – Full support
Chrome Android 106 (Release date: 2022-09-27)
footnote Full support
Firefox for Android – No support
Firefox for Android
footnote No support
Opera Android – Full support
Opera Android 72 (Release date: 2022-10-21)
footnote Full support
Safari on iOS – Full support
Safari on iOS 26 (Release date: 2025-09-15)
footnote Full support
Samsung Internet – Full support
Samsung Internet 20 (Release date: 2023-02-10)
footnote Full support
WebView Android – Full support
WebView Android 106 (Release date: 2022-09-27)
footnote Full support
WebView on iOS – Full support
WebView on iOS 26 (Release date: 2025-09-15)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support