**参考资料** - [MDN:function*](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Statements/function*) - [探索es6系列之----Generator生成器函数](https://juejin.im/post/5b3c7904e51d451914629286) - [ES6 function* , yeild, Promise详解](https://blog.csdn.net/ZYC88888/article/details/82730375)
参考资料