promise-while.js

function promiseWhile(cond, prom) {
  return prom().then(r=> { return cond(r) ? promiseWhile(cond, prom) : r; });
}

function countTo(n) {
    let i = 0;
    return promiseWhile((r)=> r < n, () => {
        return new Promise((resolve, reject)=> {
            console.log(i);
            setTimeout(()=>{i++; resolve(i);}, 1000);
        });
    });
}

countTo(11).then(r=> { console.log(`Counted to ${r}`); });