SOURCE

const myPromiseAll = function (iterable) {
    const ret = []
    const errors = []
    return new Promise((resolve, reject) => {
        for (let eachPromise of iterable) {
            Promise.resolve(eachPromise).then((value) => {
                ret.push(value)
            if (ret.length === iterable.size || ret.length === iterable.length) {
                resolve(ret)
            }
            }).catch(e => {
                errors.push(e)
                if (errors.length === 2) {
                    reject(errors)
                }
            })
        }
    })
}

myPromiseAll([Promise.reject(1), Promise.resolve(2), Promise.resolve(3), 
new Promise(resolve => setTimeout(resolve, 1000, 1))])
.then((value) => console.log(value))
.catch(e =>console.log(e))