const data3 = [
    {
        id: 1,
        name: '前端',
        children: [
            {
                id: 2,
                name: 'html',
                children: [
                    { id: 5, name: 'vue', children: [] },
                    { id: 6, name: 're', children: [] },
                ]
            },
            {
                id: 3,
                name: 'html',
                children: [
                    { id: 7, name: 'vue', children: [] },
                    { id: 8, name: 're', children: [] },
                ]
            }
        ]
    }
]