// 传入 id、树形结构数据export function getParentTree(id, tree) {  let arr = [] //要返回的数组  for (let i = 0; i < tree.length; i++) {    let item = tree[i]    arr = []    arr.push(item) //保存当前节点id    if (id== item.id) {      //判断当前id是否是默认id      return arr //是则退出循环、返回数据    } else {      //否则进入下面判断，判断当前节点是否有子节点数据      if (item.children && item.children.length > 0) {        //合并子节点返回的数据        arr = arr.concat(getParentTree(id, item.children ? item.children : []))        console.log(arr)        if (arr.map(item2 => (item2 ? item2.id : '')).includes(id)) {          //如果当前数据中已包含默认节点，则退出循环、返回数据          return arr        }      }    }  }

const treeData = [{  name: '1',  id: 1,  children: [{    name: '1-1',    id: 2,    children: [{      name: '1-1-1',      id: 4,    }],    name: '1-2',    id: 3,    children: [{      name: '1-2-1',      id: 5,    }],  }]},{  name: '2',  id: 6,  children: [{    name: '2-1',    id: 7,    children: [{      name: '2-1-1',      id: 9,    }],    name: '2-2',    id: 8,    children: [{      name: '2-2-1',      id: 10,    }],  }]}]console.log(getParentTree(5, treeData))