场景：Promise设置超时时间
const wrap = promise => {
let abort
let myP = new Promise((resolve, rejcet) => {
abort = reject
})
let p = Promise.race([promise, myP])
p.abort = abort
return p
}
let p = wrap(promise)
p.then(data => {console.log(data)}, (err) => {console.log(err)})
setTimeout(() => p.abort('timeout'), 2000)
