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需求：
实现带树形结构的表格，父数据显示新增下级，和父子都显示编辑。
技术：
Vue3 +Element Plus

<template><div><el-table:data="tableData"style="width: 100%; margin-bottom: 20px"row-key="id"borderdefault-expand-all><el-table-column prop="date" label="Date" sortable /><el-table-column prop="name" label="Name" sortable /><el-table-column prop="address" label="Address" sortable />  <el-table-column><el-tooltip :content="'Switch value: ' + value" placement="top"><el-switchv-model="value"style="--el-switch-on-color: #13ce66; --el-switch-off-color: #ff4949"active-value="100"inactive-value="0"/></el-tooltip> </el-table-column><el-table-column align="right"><template #default="scope"><el-buttonv-if="[1, 2, 3, 4].includes(scope.row.id)"size="small" @click="handleEdit(scope.$index, scope.row)">新增下级</el-button><el-buttonsize="small"type="danger"@click="handleDelete(scope.$index, scope.row)">编辑</el-button></template></el-table-column></el-table></div>
</template><script lang="ts" setup>
import {ref} from "vue"
interface User {id: numberdate: stringname: stringaddress: stringhasChildren?: booleanchildren?: User[]}const tableData: User[] = [{id: 1,date: '2016-05-02',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',},{id: 2,date: '2016-05-04',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',},{id: 3,date: '2016-05-01',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',children: [{id: 31,date: '2016-05-01',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',},{id: 32,date: '2016-05-01',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',},],},{id: 4,date: '2016-05-03',name: 'wangxiaohu',address: 'No. 189, Grove St, Los Angeles',},
]
const handleEdit = (index: number, row: User) => {
console.log(row)
}const value = ref('0')</script>