Function createWritableStream

lib/internal/webstreams/writablestream.js:584–590

(start, write, close, abort, highWaterMark = 1, size = defaultSizeAlgorithm)

ObjectSetPrototypeOf(InternalWritableStream, WritableStream);

function createWritableStream(start, write, close, abort, highWaterMark = 1, size = defaultSizeAlgorithm) {
  const stream = new InternalWritableStream(start, write, close, abort, highWaterMark, size);

  // For spec compliance the InternalWritableStream must be a WritableStream
  stream.constructor = WritableStream;
  return stream;
}

const isWritableStream =
  isBrandCheck('WritableStream');