效果图：

---

实现方法

1、安装

# use npm
npm i vue2-org-tree

# use yarn
yarn add vue2-org-tree

2、main.js中引入

import Vue from 'vue'
import Vue2OrgTree from 'vue2-org-tree'

Vue.use(Vue2OrgTree)

// ...

3、组件中使用

template代码

<vue2-org-tree 
 :data="treeData" 
 collapsable
 :render-content="renderContent"
 @on-expand="onExpand"
 @on-node-click="NodeClick"/>

数据

data () {
    return {
      treeData: {
        id: '0',
        label: "NBA季后赛",
        children: [
          {
            id: '1',
            label: "西部球队",
            children: [
              {
                id: '1-1',
                label: "勇士"
              },
              {
                id: '1-2',
                label: "火箭"
              },
              {
                id: '1-3',
                label: "太阳"
              },
              {
                id: '1-4',
                label: "小牛"
              }
            ]
          },
          {
            id: '2',
            label: "东部球队",
            children: [
              {
                id: '2-1',
                label: "热火"
              },
              {
                id: '2-2',
                label: "雄鹿"
              },
              {
                id: '2-3',
                label: "骑士"
              },
              {
                id: '2-4',
                label: "凯尔特人"
              }
            ]
          }
        ]
      }
    }
  },

方法

created(){
    this.toggleExpand(this.treeData,true);
  },
  methods:{
    collapse(list) {
        list.forEach((child)=> {
          if (child.expand) {
            child.expand = false;
          }
          child.children && this.collapse(child.children);
      });
    },
    onExpand(e,data) {
      console.log(data,'data')
      if ("expand" in data) {
        data.expand = !data.expand;
        if (!data.expand && data.children) {
          this.collapse(data.children);
        }
      } else {
        this.$set(data, "expand", true);
      }
    },
    toggleExpand(data, val) {
        if (Array.isArray(data)) {
            data.forEach((item)=> {
              this.$set(item, "expand", val);
              if (item.children) {
                this.toggleExpand(item.children, val);
              }
            });
        } else {
            this.$set(data, "expand", val);
            if (data.children) {
              this.toggleExpand(data.children, val);
            }
        }
    },
    NodeClick(e,data){
      console.log(e)
        // e 为 event
      console.log(data)
        // 当前项的所有详情 如：id label children
    },
    renderContent(h, data) {
      return (
        <div class="treeItem">{data.label}</div>
      )
    },
  }

注意：一定要在style中引入样式文件，否则展开收缩按钮显示不出来

<style lang="less">
@import '../libs/org-tree.less';
</style>

样式文件参考码云
码云地址