vue3 keep-alive使用

  <router-view v-slot="{ Component }">
    <keep-alive>
      <component :is="Component" :key="$route.name" v-if="$route.meta.keepAlive" />
    </keep-alive>
    <component :is="Component" :key="$route.name" v-if="!$route.meta.keepAlive" />
  </router-view>