js如何遍历数组把最后一层children去掉

Question

问题遇到的现象和发生背景

element动态树的数据一共有四层，如何遍历数据把最后一层children数据去掉呢？

我想要达到的结果

遍历出的数据保留三层

Answer 1

判断 层数呗，最笨的就是循环三遍

 let treeData = [
      {
        name: "555",
        children: [
          {
            name: "666",
            children: [
              {
                name: "777",
                children: [
                  {
                    name: "888",
                    children: [
                      {
                        name: "5555",
                        children: []
                      }

                    ]
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        name: "111",
        children: [
          {
            name: "222",
            children: [
              {
                name: "333",
                children: [
                  {
                    name: "444",
                    children: [
                      {
                        name: "5555",
                        children: []
                      }
                    ]
                  }
                ]
              }
            ]
          }
        ]
      }
    ];
   
    console.log(treeDataFn(treeData))
    function treeDataFn(treeData) {
      treeData.map((item, index) => {
        if (item.children) {
          item.children.map((item1) => {
            if (item1.children) {
              item1.children.map((item2) => {
                delete item2.children;
              })
            }
          })
        }
      });
      return treeData;
    }