vue使用TreeSelect设置带所有父级节点的回显

Element Plus的el-tree-select组件

思路： 选中节点时，给选中的节点赋值 pathLabel，pathLabel 为函数生成的节点名字拼接，数据源中不包含。
在el-tree-select组件中设置 props=“{ label: ‘pathLabel’ }” 控制选中时input框中回显的字段。选择项的名称(option-label)使用插槽#default控制。

<template>
<div class="content"><el-tree-select filterable :data="deptData" :props="{ value: 'id', label: 'pathLabel', children: 'children' }"@change="handleDeptData" node-key="id"class="w100" clearable placeholder="请选择/输入分组"check-strictly :render-after-expand="true"v-model="deptIds"><template #default="{ data: { name } }"><span>{{ name }}</span></template></el-tree-select>
</div>
</template>
<script setup lang="ts">
const deptIds = ref('')
const deptData = ref([{id: 1100, name: '第一级', children: [{ id: 1101, name: '1-1' ,children: [{ id: 110101, name: '1-1-1' },{ id: 110102, name: '1-2-2' },{ id: 110103, name: '1-3-3' },] },{ id: 1102, name: '1-2' },{ id: 1103, name: '1-3' },]},{id: 1200, name: '第二级', children: [{ id: 1201, name: '2-1' },{ id: 1202, name: '2-2' },{ id: 1203, name: '2-3' },]},
])
const handleDeptData = (deptId: string) => {findPath(deptData.value, deptId);
}// 根据分组id获取分组名
function findPath(tree:any, targetId:string) {let path = [];let currentNode;// 查找节点function findNode(nodes, currentPath) {for (let node of nodes) {const newPath = [...currentPath, node.name];if (node.id === targetId) {currentNode = node;path = newPath;return true;}if (node.children && findNode(node.children, newPath)) {return true;}}return false;}findNode(tree, []);// 选中节点赋值 pathLabelif (currentNode) currentNode.pathLabel = path.length ? path.join('/') : null;return path.length ? path.join('/') : null;
}
</script>