RouterView slot

<router-view v-slot="{ Component }">
  <component :is="Component" />
</router-view>

KeepAlive & Transition

When working with the KeepAlive component, we would usually want it to keep the route components alive, not the RouterView itself

<router-view v-slot="{ Component }">
  <transition>
    <keep-alive>
      <component :is="Component" />
    </keep-alive>
  </transition>
</router-view>