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ReadableStream.locked

Draft
This page is not complete.

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

The locked getter property of the ReadableStream interface returns whether or not the readable stream is locked to a reader.

Syntax

var locked = readableStreamInstance.locked;

Value

A Boolean indicating whether or not the readable stream is locked.

Examples

const stream = new ReadableStream({
  ...
});

const reader = stream.getReader();

stream.locked
// should return true, as the stream has been locked to a reader

Specifications

Specification Status Comment
Streams
The definition of 'locked' in that specification.
Living Standard Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4316571 No30 ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support43431657130 ?4.0

1. From version 57: this feature is behind the dom.streams.enabled preference (needs to be set to true) and the javascript.options.streams preference (needs to be set to true). To change preferences in Firefox, visit about:config.

Document Tags and Contributors

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