编辑代码

let promise = new Promise(function(resolve,reject){
    // some code
    // resolve和rejiect也是函数,用来将结果返回出去,
    if (''){
        resolve(value)
    }else{
        reject(error)
    }
});

let promise2 = new Promise((resolve,reject) => {
    if(){
        resolve(value);
    }else{
        reject(value);
    }
});