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WritableStreamDefaultWriter.releaseLock

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

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The releaseLock() method of the WritableStreamDefaultWriter interface releases the writer's lock on the corresponding stream. After the lock is released, the writer is no longer active. If the associated stream is errored when the lock is released, the writer will appear errored in the same way from now on; otherwise, the writer will appear closed.

Syntax

writableStreamDefaultWriterInstance.releaseLock()

Parameters

None.

Return value

Void.

Examples

const writableStream = new WritableStream({
  write(chunk) {
    ...
  },
  close() {
    ...
  },
  abort(err) {
    ...
  }
}, queuingStrategy);

...

const writer = writableStream.getWriter();

...

// release writer's lock on the stream when desired
writer.releaseLock();

Specifications

Specification Status Comment
Streams
The definition of 'releaseLock()' in that specification.
Living Standard Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 59 16 No No 46 ?
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 59 59 16 No 46 ? ?

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultWriter/releaseLock