ES6新特性

1、https://segmentfault.com/a/1190000011344301

2、http://www.bslxx.com/a/mianshiti/tiku/2017/1019/953.html

3、http://www.bslxx.com/a/mianshiti/tiku/javascript/2017/1213/1505.html

 模板字符串的使用

https://www.cnblogs.com/zhuzhenwei918/p/6131614.html

new Promise

 https://blog.csdn.net/hyupeng1006/article/details/80351174