iterable-reader

Convert Uint8Array iterables to Go-like Reader interface.

import { createReadStream } from 'node:fs';
import { createIterableReader } from '@intrnl/iterable-reader';

let stream = createReadStream('./file.txt');
let reader = createIterableReader(stream);

let chunk = new Uint8Array(512);
await reader.read(chunk);

Working with Web Streams

Unfortunately browsers hasn't implemented using ReadableStream directly as an async iterator, in the meantime, you could use this to convert them into one.

function createStreamIterator (stream) {
  // return if browser already supports async iterator in stream
  if (Symbol.asyncIterator in stream) {
    return stream[Symbol.asyncIterator]();
  }

  let reader = stream.getReader();

  return {
    [Symbol.asyncIterator] () {
      return this;
    },
    next () {
      return reader.read();
    },
    return () {
      reader.releaseLock();
    },
    throw () {
      reader.releaseLock();
    },
  };
}