❤️ 父子传参

💡 v3 组件传参设置默认值

/*
*  @defineProps  获取传来的值
*  @withDefaults 设置默认值❤️🔑   🔩 ⚡️ ⚙💡
* 
* */
        import {defineProps, ref,withDefaults} from "vue";
        import type {typePlanList} from './type'
        interface Props {
        planList: typePlanList[]
        }
        const props = withDefaults(defineProps<Props>(), {
            planList: () => [],
        })

🔑 v3 KeepAlive用法

    

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