延迟函数delay

const delay = ms => new Promise((resolve, reject) => setTimeout(resolve, ms))

 const getData = status => new Promise((resolve, reject) => {
     status ? resolve('done') : reject('fail')
 })
 const getRes = async (data) => {
     try {
         const res = await getData(data)
         const timestamp = new Date().getTime()
         await delay(1000)
         console.log(res, new Date().getTime() - timestamp)
     } catch (error) {
         console.log(error)
     }
 }
 getRes(true) // 隔了1秒