var sleep = function (item,time) { return new Promise(function (resolve, reject) { setTimeout(function () { console.log(item) resolve('1'); }, time); }) }; async function fot () {
//foreach无法写出来 只能用for了
for (let i=0;i<arr.length;i++){ await sleep(arr[i],2000); } console.log(1111111) } fot()