react.js中模拟事件总线,子组件调用父组件时，发挥作用

参考：

https://blog.csdn.net/qq_43634982/article/details/106134279?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.nonecase

https://blog.csdn.net/qq_41287423/article/details/85330113