// 错误写法
<keep-alive v-if="$route.meta.keepAlive">
<router-view></router-view>
</keep-alive>
<router-view v-else></router-view>
// 正确写法
<keep-alive>
<router-view v-if="$route.meta.keepAlive"></router-view>
</keep-alive>
<router-view v-if="!$route.meta.keepAlive"></router-view>
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