ReadableStream API

Iterable ReadableStream - not yet

async function* streamAsyncIterator(stream) {
  const reader = stream.getReader()
  try {
    while (true) {
      const {done, value} = await reader.read()
      if (done) return
      yield value;
    }
  }
  finally {
    reader.releaseLock()
  }
}

ReadableStream should be an async iterable · Issue #778 · whatwg/streams

(I'm adding this mostly as a tracking bug after I asked about it in the wrong place) NodeJS is looking into supporting async iterables as a way to stream data, and it would be great if fetch (or the readable stream part of fetch) support...

https://github.com/whatwg/streams/issues/778

Async iterators and generators

Streaming fetches are supported in Chrome, Edge, and Safari, and they look a little like this: This code is pretty readable thanks to async functions ( here's a tutorial if you're unfamiliar with those), but it's still a little clumsy.

https://jakearchibald.com/2017/async-iterators-and-generators/#making-streams-iterate