❗️Что будет на выходе?

function* genSequence() {
  const result = yield 'first';
  console.log(result);
  yield* [1, 2];
  return 'done';
}

const gen = genSequence();
let next = gen.next('ignored');
console.log(next.value);
next = gen.next('second');
next = gen.next();
console.log(next.value);
next = gen.next();
console.log(next);

Ответ: first second 2 { value: 'done', done: true }

JavaScript test | #JavaScript