async iterator example

(async () => { const iterator = asyncRangeGenerator(1, 3); console.log(iterator.next()); // Promise console.log(await iterator.next()); // Object {value: 2, done: false} console.log(await iterator.next()); // Object {value: 3, done: false} console.log(await iterator.next()); // Object {value: undefined, done: true} const iterator2 = asyncRangeGenerator(1, 5); for await (const num of iterator2) { console.log(num); } })(); function delay(timeout, value) { return new Promise(resolve => setTimeout(() => resolve(value), timeout)); } async function* asyncRangeGenerator(start, end) { while (start <= end) { yield delay(1000, start++); } }