Use an array as an iterable

const arr = [1, 2];

console.log(arr.next()); // Error

const iterable = arr.values();
console.log(iterable.next()); // { value: 1, done: false }
console.log(iterable.next()); // { value: 2, done: false }
console.log(iterable.next()); // { value: undefined, done: true }