cool async generator helper for nodejs stdin

index.js

/** Helper for working with `process.stdin` as a char-by-char iterator */
async function* stdin() {
  process.stdin.setEncoding('utf-8');
  process.stdin.resume();
  if (process.stdin.isTTY) process.stdin.setRawMode(true);

  for await (const char of process.stdin) {
    // raw mode doesn't get set when piping text into stdin, so often text is
    // given altogether
    if (char.length > 1) {
      for (const c of char.split('')) yield c;
    } else yield char;
  }
}

(async () => {
  for await (const char of stdin()) {
    if (char === '\3') process.exit(0);
    else console.log(char);
  }
})();