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TransformStreamDefaultController: enqueue() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since June 2022.

Note: This feature is available in Web Workers.

The enqueue() method of the TransformStreamDefaultController interface enqueues the given chunk in the readable side of the stream.

For more information on readable streams and chunks see Using Readable Streams.

In this article

Syntax

js

enqueue(chunk)

Parameters

chunk

The chunk being queued. A chunk is a single piece of data. It can be any type of data, and a stream can contain chunks of different types.

Return value

None (undefined).

Exceptions

The stream is not readable. This might occur if the stream is errored via controller.error(), or when it is closed without its controller's controller.close() method ever being called.

Examples

In this example an encoded chunk is passed to the queue using the enqueue() method.

js
const textEncoderStream = new TransformStream({
  transform(chunk, controller) {
    controller.enqueue(new TextEncoder().encode(chunk));
  },
  flush(controller) {
    controller.terminate();
  },
});

Specifications

Specification

Streams
# ts-default-controller-enqueue

Browser compatibility

Enable JavaScript to view this browser compatibility table.

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This page was last modified on Apr 22, 2024 by MDN contributors.

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