ReadableStreamDirectController

interface ReadableStreamDirectController

• close(

  error?: Error

  ): void;
• end(): number | Promise<number>;
• flush(

  wait?: boolean

  ): number | Promise<number>;

  Flush any locally buffered data to the destination.

  @param wait

  When true, the returned promise resolves only once the destination has drained its own internal buffer (i.e. backpressure has cleared). Use this after write returns a Promise.

• start(): void;
• write(

  data: string | BufferSource

  ): number | Promise<number>;

  Write a chunk directly to the destination.

  Returns the number of bytes written, or a pending Promise<number> when the destination's internal buffer is full (backpressure). The chunk was accepted either way; awaiting the result is enough:

  await controller.write(chunk);

  The promise resolves once the destination has drained. await controller.flush(true) is equivalent.