编辑代码

const p1 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve(111)
    }, 1000)
})
const p2 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve(222)
    }, 2000)
})

let p3 = Promise.all([p1, p2]).then(res => {
    console.log(res)
})
promiseAll([p1, p2]).then(res => {
    console.log(res)
})
function promiseAll(list) {
    const result = []
    let count = 0
    return new Promise((reslove, reject) => {
        for (var i = 0; i < list.length; i++) {
            let item = list[i]
            item.then(res => {
                result.push(res)
                count++
                if (count === list.length) {
                    reslove(result)
                }
            }, err => {
                reject(err)
            })
        }

    })
}