Promise笔记

let status = 1;
let logIn = (resolve,reject) => {
    setTimeout(()=>{
        if(status == 1){
            resolve({code:200,msg:'登录成功'})
        }else{
            reject({code:400,msg:'登录失败'})
        }
    },1000)
}
let getUserInfo = (resolve,reject) => {
    setTimeout(()=>{
        if(status == 1){
            resolve({code:200,msg:'获取用户信息成功'})
        }else{
            reject({code:400,msg:'获取用户信息失败'})
        }
    },1000)
}
new Promise(logIn).then(res=>{
    console.log('用户登录成功');
    return new Promise(getUserInfo);
}).then(res=>{
    console.log('获取用户信息成功');
    console.log(res);
})
//返回结果
用户登录成功
获取用户信息成功
{ code: 200, msg: '获取用户信息成功' }