jk-temporary-workers-portal/src/plugins/CompanyTree.js

import companyInfoApi from "@/api/base/companyInfo";

export default {
  install(Vue) {
    Vue.prototype.$cloneData = (title, content, callback) => {
      var companyResult = "";

      companyInfoApi.list().then(function (response) {
        var jsonData = response.data;
        if (jsonData.result) {
          companyResult = jsonData.data;
        }
      });

      let cloneData = JSON.parse(JSON.stringify(companyResult)); // 对源数据深度克隆
      cloneData.filter(father => {
        // 循环所有项，并添加children属性
        let branchArr = cloneData.filter(child => father.id == child.parentId); // 返回每一项的子级数组
        branchArr.length > 0 ? (father.children = branchArr) : ""; //给父级添加一个children属性，并赋值
        return father.parentId == null; //返回第一层
      });
      return cloneData;
    };
  }
}