Method close

lib/internal/webstreams/writablestream.js:444–460

* @returns {Promise }

()

   * @returns {Promise<void>}
   */
  close() {
    if (!isWritableStreamDefaultWriter(this))
      return PromiseReject(new ERR_INVALID_THIS('WritableStreamDefaultWriter'));
    const {
      stream,
    } = this[kState];
    if (stream === undefined) {
      return PromiseReject(
        new ERR_INVALID_STATE.TypeError(
          'Writer is not bound to a WritableStream'));
    }
    if (writableStreamCloseQueuedOrInFlight(stream)) {
      return PromiseReject(
        new ERR_INVALID_STATE.TypeError('Failure to close WritableStream'));
    }
    return writableStreamDefaultWriterClose(this);
  }

  releaseLock() {
    if (!isWritableStreamDefaultWriter(this))