ES6---Promise对象解决异步编程

    let p = new Promise(function (resolve, reject) {
     
        let res = $.ajax(
            {
     
                type: "POST",
                async: false,
                data: null,
                url: baseUrl + "/test",
                success: function (data) {
     
                    return data;
                },
                error: function (data) {
     
                    return data;
                }
            }
        );
        resolve(res);
    });

    function post_sth(data) {
     
        return new Promise(function (resolve, reject) {
     
            setTimeout(function () {
     
                let res = {
     mgs: 'success'};
                console.log('=====第一个请求的res是====');
                console.log(data);
                console.log(`===第二个定时器的res是===`);
                console.log(res);
                resolve(res);
            }, 2500);
        });
    }
        
    p.then(post_sth).then(function (data) {
     
        console.log(`最后获取的数据是定时器里的res===`);
        console.log(data);
    });

关于promise对象的基础知识可以参考 MDN或ECMAScript 6 入门.