W3cubDocs

/DOM

WritableStreamDefaultWriter.closed

Draft
This page is not complete.

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

The closed getter property of the WritableStreamDefaultWriter interface returns a promise that fulfills if the stream becomes closed or the writer's lock is released, or rejects if the stream errors.

Syntax

var closed = writableStreamDefaultWriterInstance.closed;

Value

A Promise.

Examples

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

...

const writer = writableStream.getWriter();

..

// check if the stream is closed
writer.closed.then(() => {
  console.log('writer closed');
})

Specifications

Specification Status Comment
Streams
The definition of 'closed' 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 ? ?

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WritableStreamDefaultWriter/closed