【Vue3】递归组件

1. 递归组件mock数据

App.vue

<template><div><Tree :data="data"></Tree></div>
</template><script setup lang="ts">
import { reactive } from 'vue';
import Tree from './components/Tree.vue';
interface Tree {name: string,checked: boolean,children?: Tree[]
}
const data = reactive<Tree[]>([{name: '1',checked: true,children: [{name: '1-1',checked: false}]},{name: '2',checked: true,},{name: '3',checked: false,children: [{name: '3-1',checked: false,children: [{name: '3-1-1',checked: false},{name: '3-1-2',checked: true},],}]},])
</script><style lang="scss" scoped></style>

2. 递归组件定义名称

子组件Tree.vue

<template><div class="tree" v-for="item in data"><input v-model="item.checked" type="checkbox"> <span>{{ item.name }}</span>// 1.模板自定义名称 直接使用文件名当做递归组件的名称 Tree<Tree v-if="item?.children?.length" :data="item?.children"></Tree></div>
</template><script setup lang="ts">
// import { ref,reactive } from 'vue';
interface Tree {name: string,checked: false,children?: Tree[]
}// // 3.模板自定义名称 利用defineOptions
// defineOptions({
//   name: 'nihao'
// })defineProps<{data?: Tree[]
}>()
</script><!-- // 2.模板自定义名称
<script lang="ts">
//可以将模板中的Tree改名为“nihao”
export default {name: "nihao"
}
</script> --><style lang="scss" scoped>
.tree {margin-left: 10px;
}
</style>

3. 递归组件处理事件

子组件Tree.vue

<template><div @click.stop="clickTap(item,$event)" class="tree" v-for="item in data"><input v-model="item.checked" type="checkbox"> <span>{{ item.name }}</span><Tree v-if="item?.children?.length" :data="item?.children"></Tree></div>
</template><script setup lang="ts">
// import { ref,reactive } from 'vue';
interface Tree {name: string,checked: false,children?: Tree[]
}defineProps<{data?: Tree[]
}>()const clickTap = (item:Tree,e) => {console.log(item, e.target);
}
</script><style lang="scss" scoped>
.tree {margin-left: 10px;
}
</style>