vue3 App.vue
<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>
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vue2 App.vue
<keep-alive>
<router-view v-if="$route.meta.keepAlive"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>
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