第 89 题：设计并实现 Promise.race() 代码：

[DreamLee1997]

代码：

let p1 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('success1')
    }, 200)
})
let p2 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('success2')
    }, 100)
})
let p3 = new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('success3')
    }, 300)
})
let p4 = new Promise((resolve, reject) => {
    setTimeout(() => {
        reject('failed1')
    }, 200)
})
let promises = [p1, p2, p3, p4]

Promise._race = promises = new Promise((resolve, reject) =>{
    promises.forEach((promise)=>{
        promise.then(resolve,reject);
    })
})

输出：