Vue3项目Failed to resolve component: router-view

vue3项目中，有如下警告页面渲染不出来：

[Vue warn]: Failed to resolve component: router-view
If this is a native custom element, make sure to exclude it from component resolution via compilerOptions.isCustomElement. 
  at <App>

在对应的路由配置文件中，看是否加了export default router，将router暴露出来即可