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ByteLengthQueuingStrategy.ByteLengthQueuingStrategy()

Draft
This page is not complete.

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

The ByteLengthQueuingStrategy() constructor creates and returns a ByteLengthQueuingStrategy() object instance.

Syntax

var byteLengthQS = new ByteLengthQueuingStrategy({highWaterMark});

Parameters

{highWaterMark}
An object containing a highWaterMark property. This is a non-negative integer defining the total number of chunks that can be contained in the internal queue before backpressure is applied.

Return value

An instance of the ByteLengthQueuingStrategy object.

Exceptions

None.

Examples

const queuingStrategy = new ByteLengthQueuingStrategy({ highWaterMark: 1 });

const readableStream = new ReadableStream({
  start(controller) {
    ...
  },
  pull(controller) {
    ...
  },
  cancel(err) {
    console.log("stream error:", err);
  }
}, queuingStrategy);

var size = queuingStrategy.size(chunk);

Specifications

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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support5916571 No46 ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support59591657146 ?7.0

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,