CountQueuingStrategy: CountQueuingStrategy() constructor

Note: This feature is available in Web Workers.

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

Syntax

js
new CountQueuingStrategy(options)

Parameters

options

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

See also