async 更优雅异步体验

[RubyLouvre]

http://www.html-js.com/article/qianduanzhetengbiji-async-gengyouyayibutiyan%203654

[RubyLouvre]

https://mp.weixin.qq.com/s?__biz=MzIwNjQwMzUwMQ==&mid=2247483938&idx=1&sn=830a3b9f2f495c5760a8e22606cd10c4&scene=1&srcid=0718lq5kJZpwSI4KujZWTyIt&key=77421cf58af4a653e4d9d5f534384580952191570bd19c725456c6ec7729da2662df973645e36921c5abb5069b210971&ascene=0&uin=MjIxODU4Mjk0MQ%3D%3D&devicetype=iMac+MacBookPro11%2C4+OSX+OSX+10.11.5+build(15F34)&version=11020201&pass_ticket=oNLG3N9mHr2wJOKU2xCz5JvvI0P4mzvuqoB1AJmnSbqEr09SQT%2FmcQyodahKDChD

[RubyLouvre]

https://www.zhihu.com/question/29504639?sort=created

http://fex.baidu.com/blog/2015/07/we-have-a-problem-with-promises/

https://segmentfault.com/a/1190000005182270