~~~ function getData(){ return new Promise((resolve,reject)=>{ setTimeout(()=>{ let userName = "张三"; resolve(userName); },1000) }) } getData().then((data)=>{ console.log(data); }) ~~~ ~~~ function getData(){ return new Promise((resolve,reject)=>{ setTimeout(()=>{ let userName = "张三"; resolve(userName); },1000) }) } async function show(){ let data = await getData(); console.log(data); } show(); ~~~