Vue3+elementPlus中 树形控件封装的实现

<template>
  <div class="selection">
    <el-select placeholder="请选择" v-model="namelist" clearable @clear="handleclear" ref="selectupresid" style="width: 100%">
      <el-option hidden :key="1" :value="1"></el-option
      ><!--这个必不可少否则显示不出来下拉数据-->
      <!-- check-strictly :父子是否联动，根据业务修改 -->
      <el-tree
        :data="options"
        node-key="id"
        :props="defaultprops"
        :default-checked-keys="huixianarr"
        @check="handlenodeclick"
        show-checkbox
        ref="treeref"
        :check-strictly="true"
      >
      </el-tree>
    </el-select>
  </div>
</template>
<script setup name="selects">
import { ref, reactive } from "vue";
//接受父组件传来的数据
const props = defineprops({
  treefilterdata: {
    type: array,
    default: () => [] //树形控件数据源
  },
  treehxlist: {
    type: array,
    default: () => [] //回显id集合，根据业务修改
  },
  dfprops: {
    type: object,
    default: () => {} //树形控件配置项，根据业务修改
  }
});
const treeref = ref();
let namelist = ref("");
let huixianarr = ref([]);
let idlist = ref();
let options = ref([]);
let defaultprops = ref({});
defaultprops.value = props.dfprops;
let hxlist = ref([]);
let treeform = ref();
let list = ref();
var propertyname = props.dfprops.label;
init();
function init() {
  options.value = props.treefilterdata;
  huixianarr.value = props.treehxlist;
  let hxlist = findpathsbyids(options.value, huixianarr.value);
  namelist.value = hxlist.join(","); //显示内容
}
const emit = defineemits(["checkedid"]);
function handlenodeclick(data, lst) {
  let arr = [],
    name = [];
  lst.checkednodes.foreach(item => {
    //过滤拿到选中的id
    arr.push(item.id);
  });
  lst.checkednodes.foreach(item => {
    //过滤拿到选中的name

    name.push(item[propertyname]);
  });
  namelist.value = name.join(","); //显示内容
  idlist.value = arr; //后台传参需要的id
  //传给父组件

  emit("checkedid", idlist.value);
}
function handleclear() {
  hxlist.value = [];
  idlist.value = []; //id集合
  namelist.value = ""; //input显示内容
  huixianarr.value = []; //回显id集合
  treeref.value.setcheckedkeys([]); //清空
}
function findpathsbyids(data, targetids) {
  const resultpaths = []; // 存储匹配的 title

  // 辅助函数：递归查找单个 id 的 title
  function findpathrecursive(items, targetid) {
    for (const item of items) {
      // 如果当前项的 id 匹配，添加其 title 到结果数组
      if (item.id === targetid) {
        resultpaths.push(item[propertyname]);
        return; // 找到后直接返回
      }

      // 如果有 children，递归查找
      if (item.children && item.children.length > 0) {
        findpathrecursive(item.children, targetid);
      }
    }
  }

  // 遍历目标 id 数组，逐一查找
  for (const id of targetids) {
    findpathrecursive(data, id);
  }
  return resultpaths;
}
</script>
<style scoped>
.selection {
  width: 300px;
}
</style>

 <selectoption :treefilterdata="treefilterdata" :treehxlist="treehxlist" :dfprops="dfprops" @checkedid="gettreelist" />
//回显
const treefilterdata = ref([1]); 
//格式
let dfprops = ref({
  children: "children",
  label: "title"
});  
//数据
const treefilterdata = ref([
    {
      "id": 1,
      "path": "/home/index",
      "name": "home",
      "component": "/home/index",
      "title": "首页",
      "meta": {
        "icon": "homefilled",
        "title": "首页",
        "islink": "",
        "ishide": false,
        "isfull": false,
        "isaffix": true,
        "iskeepalive": true
      }
    },
    {
      "id": 6,
      "path": "/system",
      "name": "system",
      "redirect": "/system/accountmanage",
      "title": "系统管理",
      "meta": {
        "icon": "tools",
        "title": "系统管理",
        "islink": "",
        "ishide": false,
        "isfull": false,
        "isaffix": false,
        "iskeepalive": true
      },
      "children": [
        {
          "id": 61,
          "father": 6,
          "path": "/system/accountmanage",
          "name": "accountmanage",
          "component": "/system/accountmanage/index",

          "title": "账号管理",
          "meta": {
            "icon": "menu",
            "title": "账号管理",
            "islink": "",
            "ishide": false,
            "isfull": false,
            "isaffix": false,
            "iskeepalive": true
          }
        },
        
        
      ]
    }
  ]);