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

怎么实现axios的then执行完再执行后续程序,并return返回的值文章目录前言总结前言await 会等到promise的then执行完之后，再执行后续程序async function aa(){let resData;await axios.post(url,data).then(res=>{resData = res;})return resData}总结踩坑路漫漫长@~@...

longlongago~~

13063人浏览 · 2022-04-21 18:28:23

longlongago~~ · 2022-04-21 18:28:23 发布

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();

在这里插入图片描述

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();

在这里插入图片描述

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();