作用
让不展示的路由组件保持挂载，不被销毁
具体编码
在需要缓存的路由组件上级组件中编写如下代码
<keep-alive include="name1,name2,..."> <router-view></router-view></keep-alive><keep-alive :include="['name1','name2',...]"> <router-view></router-view></keep-alive>让不展示的路由组件保持挂载，不被销毁
在需要缓存的路由组件上级组件中编写如下代码
<keep-alive include="name1,name2,..."> <router-view></router-view></keep-alive><keep-alive :include="['name1','name2',...]"> <router-view></router-view></keep-alive>