await把Promise解析为普通对象，async函数return的返回值是promise对象，await后转化为普通Object

async函数return的是Promise，await Promise后得到Object

---

前言

1、函数return的返回值Object，await后得到的是Object

function aa(){
    let num = 5
    return num;
}

async function bb (){
    let num1 = aa();
    let num2 = await aa();
    console.log(num1);
    console.log(num2);
}

bb();

2、async函数return的返回值是Promise，await后得到是Object

async function aa(){
    let num = 5
    return num;
}

async function bb (){
    let num1 = aa();
    let num2 = await aa();
    console.log(num1);
    console.log(num2);
}

bb();

3、函数直接return Promise，await后得到是Object

function aa(){
    let num = 5
    return new Promise((resolve,reject)=>{
        resolve(num);
    });
}

async function bb (){
    let num1 = aa();
    let num2 = await aa();
    console.log(num1);
    console.log(num2);
}

bb();

综上 async函数return出来的是promise对象，需要await后方可转化为普通Object

总结

踩坑路漫漫长@~@