//树结构
  const treeData = [
    {
      value: '主目录',
      id: '0-0',
      level: 1,
      children: [
        {
          value: '子目录一',
          id: '0-0-0',
          children: [
            {
              value: '孖一',
              id: '0-0-0-0',
              children: [{
                value: '子子子子',
                id: '0-0-0-0-0',
                children: [{
                  value: '哈哈哈',
                  id: '0-0-0-0-0-1',
                }]
              }]
            },
            {
              value: '孖二',
              id: '0-0-0-1',
            },
          ],
        },
        {
          value: '子目录2',
          id: '0-0-1',
          children: [{ value: '子目录2-2', id: '0-0-1-0' }],
        },
        {
          value: '子目录3',
          id: '0-0-3',
          children: [
            { value: '子目录3-2', id: '0-0-2-0' },
            { value: '子目录3-3', id: '0-0-2-1' },
          ],
        },
      ],
    },
    {
      value: '目录2',
      id: '0-1',
      children: [
        {
          value: '子目录8098',
          id: '0-1-3',
          children: [
            { value: '子目录00-2', id: '0-1-2-0' },
            { value: '子目录90-3', id: '0-1-2-1' },
          ],
        },
      ],
    },
  ];

//递归
 const renderTree = (data, level) => {
    return data.map((item) => {
      item.level = level;
      if (item.children) {
        renderTree(item.children, level + 1);
      }
    });
  };
renderTree(treeData, 1);
  console.log('treedata=>',treeData);