将一维数组的树形结构的数据，转化为 供 例如（treeselect 组件）使用的数据

/**
 * 构造树型结构数据
 * @param {*} data 数据源
 * @param {*} id id字段 默认 'id'
 * @param {*} parentId 父节点字段 默认 'parentId'
 * @param {*} children 孩子节点字段 默认 'children'
 * @param {*} rootId 根Id 默认 0
 */
export function handleTree(data, id, parentId, children, rootId) {
  id = id || "id";
  parentId = parentId || "parentId";
  children = children || "children";
  rootId =
    rootId ||
    Math.min.apply(
      Math,
      data.map((item) => {
        return item[parentId];
      })
    ) ||
    0;
  //对源数据深度克隆
  const cloneData = JSON.parse(JSON.stringify(data));
  //循环所有项
  const treeData = cloneData.filter((father) => {
    let branchArr = cloneData.filter((child) => {
      //返回每一项的子级数组
      return father[id] === child[parentId];
    });
    branchArr.length > 0 ? (father.children = branchArr) : "";
    //返回第一层
    return father[parentId] === rootId;
  });
  return treeData != "" ? treeData : data;
}