SOURCE

Promise.myAll = function (iterator) {
    return new Promise((resolve, reject) => {
        const ret = []
        let resolvedCount = 0
        for (let promise of iterator) {
            Promise.resolve(promise).then((data) => {
                resolvedCount++
                ret.push(data)
                if (resolvedCount === iterator.length || resolvedCount === iterator.size) {
                    resolve(ret)
                }
            }).catch(e => {
                reject(e)
            })
        }
    })
}

const promise1 = Promise.resolve(3);
const promise2 = 42;
const promise3 = new Promise((resolve, reject) => {
  setTimeout(resolve, 2000, 'foo');
});

Promise.myAll(new Set([promise1, promise2, promise3])).then((data) => {
    console.log(data)
}).catch(e => console.log(e))