引用
1，https://juejin.im/post/5acc7e606fb9a028c67609f7
2，https://zhuanlan.zhihu.com/p/28508795
3，http://www.zsoltnagy.eu/cloning-objects-in-javascript/
4,http://www.cnblogs.com/penghuwan/p/7359026.html
5,https://blog.csdn.net/github_38524608/article/details/78812761
6,https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Spread_syntax