AsyncGenerator/JavaScript/9-next.js at master · stillgg/AsyncGenerator

26 lines (24 loc) · 554 Bytes

'use strict';

async function* counter(begin, end, delta) {

let value = begin;

let nextValue = begin + delta;

while (true) {

value = nextValue;

nextValue += delta;

if (nextValue > end) return value;

const back = yield value;

if (back) {

value += back;

nextValue += back;

if (nextValue > end) {

value = undefined;

return value;

}

const c = counter(0, 180, 12);

c.next().then(console.log);

c.next(150).then(console.log);

c.next().then(console.log);

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