Rxjs, Promise, Async/Await

Promise 是 ES 6

Async/Await 是 ES 7

Rxjs 是一个 js 库

参考

http://www.cnblogs.com/keatkeat/p/7084388.html

http://www.jianshu.com/p/063f7e490e9a

promise》》》》 http://es6.ruanyifeng.com/#docs/promise

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