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 compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support5916 No No46 ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support595916 No46 ? ?

Document Tags and Contributors

Contributors to this page: connorshea, chrisdavidmills
Last updated by: connorshea,