类：TransformStream

【Class: TransformStream】

TransformStream 由 <ReadableStream> 和 <WritableStream> 组成，它们相互连接，使得写入 WritableStream 的数据可以被接收，并在被推入 `ReadableStream`` 的队列之前可能会被转换。

【A TransformStream consists of a <ReadableStream> and a <WritableStream> that are connected such that the data written to the WritableStream is received, and potentially transformed, before being pushed into the ReadableStream's queue.】

import {
  TransformStream,
} from 'node:stream/web';

const transform = new TransformStream({
  transform(chunk, controller) {
    controller.enqueue(chunk.toUpperCase());
  },
});

await Promise.all([
  transform.writable.getWriter().write('A'),
  transform.readable.getReader().read(),
]); 拷贝