aysnc异步函数就是时代发展的趋势
利用es6的promise的方法实现
function shaoshui(){ return new Promise((resolve,reject)=>{ setTimeout(()=>{ console.log('水开啦'); resolve('开水'); },2000) }) } // shaoshui().then(water=>{ // console.log('第一壶',water) // return shaoshui() // }).then(water=>{ // console.log('第二壶',water) // }) // 异步函数 async function shaosanhushui(){ const water1 =await shaoshui() console.log(water1) const water2 =await shaoshui() console.log(water2) const water3 =await shaoshui() console.log(water3) const water4 =await shaoshui() console.log(water4) } shaosanhushui()