WritableStreamDefaultController

This Streams API interface represents a controller allowing control of a WritableStream's state. When constructing a WritableStream, the underlying sink is given a corresponding WritableStreamDefaultController instance to manipulate.

WritableStreamDefaultController class is a global reference for import { WritableStreamDefaultController } from 'node:stream/web'. https://nodejs.org/api/globals.html#class-writablestreamdefaultcontroller