keep-alive的生命周期 activated： 页面第一次进入的时候，钩子触发的顺序是created->mounted->activated deactivated: 页面退出的时候会触发deactivated，当再次前进或者后退的时候只触发activated<keep-alive>
<router-view v-if="$route.meta.keepAlive"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>router配置routes: [
{
path: '/',
&nb...