vue & keep-alive & activated
vue 生命周期 钩子函数 缓存
http://www.cnblogs.com/nekoooo/p/6442077.html
https://www.jianshu.com/p/e9f884b6ba6c
https://blog.csdn.net/stubbor/article/details/73739765
https://laracasts.com/discuss/channels/vue/vue-router-onpagechange-event
https://stackoverflow.com/questions/53199261/vue-router-link-and-custom-event
https://stackoverflow.com/questions/46862289/vue-router-wont-work-when-a-route-is-activated