Method constructor

lib/internal/webstreams/writablestream.js:184–202

* @param {UnderlyingSink} [sink] * @param {QueuingStrategy} [strategy]

(sink = kEmptyObject, strategy = kEmptyObject)

   * @param {QueuingStrategy} [strategy]
   */
  constructor(sink = kEmptyObject, strategy = kEmptyObject) {
    markTransferMode(this, false, true);
    validateObject(sink, 'sink', kValidateObjectAllowObjects);
    validateObject(strategy, 'strategy', kValidateObjectAllowObjectsAndNull);
    const type = sink?.type;
    if (type !== undefined)
      throw new ERR_INVALID_ARG_VALUE.RangeError('type', type);

    this[kState] = createWritableStreamState();

    const size = extractSizeAlgorithm(strategy?.size);
    const highWaterMark = extractHighWaterMark(strategy?.highWaterMark, 1);

    setupWritableStreamDefaultControllerFromSink(
      this,
      sink,
      highWaterMark,
      size);
  }

  get [kIsErrored]() {
    return this[kState].state === 'errored';