t Merge branch 'master' of https://github.com/liuyepiaoxiang/es6-learning
t Merge branch 'master' of https://github.com/liuyepiaoxiang/es6-learning

liuyepiaoxiang/es6-learning,liuyepiaoxiang/es6-learning,liuyepiaoxiang/es6-learning,liuyepiaoxiang/es6-learning