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CountQueuingStrategy: CountQueuingStrategy() constructor

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

Syntax

js

new CountQueuingStrategy(highWaterMark)

Parameters

An object with the following property:

highWaterMark

The total number of chunks that can be contained in the internal queue before backpressure is applied.

Return value

An instance of the CountQueuingStrategy object.

Exceptions

None.

Examples

js

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

const writableStream = new WritableStream(
  {
    // Implement the sink
    write(chunk) {
      // …
    },
    close() {
      // …
    },
    abort(err) {
      console.log("Sink error:", err);
    },
  },
  queuingStrategy,
);

const size = queuingStrategy.size();

Specifications

Specification
Streams Standard
# ref-for-cqs-constructor①

Browser compatibility

Desktop Mobile
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CountQueuingStrategy 52 16 65 No 39 10.1 52 52 65 41 10.3 6.0

See also

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/CountQueuingStrategy/CountQueuingStrategy