CountQueuingStrategy.CountQueuingStrategy()

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

Syntax

var countQS = new CountQueuingStrategy({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 CountQueuingStrategy object.

Exceptions

None.

Examples

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

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

var size = queuingStrategy.size();

Specifications

Browser compatibility