js遍历树结构并为每个节点设置一个属性为层级？

Question

// 请问怎么在每一层加一个当前层级的属性

[
    {
        "name": "一号",
        "code": "00001",
        "children": [
            {
                "name": "231231132123132",
                "code": "12122121231231",
                "children": []
            },
            {
                "name": "啊阿斯顿",
                "code": "111导电",
                "children": []
            },
            {
                "name": "ssadasd",
                "code": "1113456",
                "children": []
            }
        ]
    }
]

Answer 1

function addLevel(list, parentLevel = 0) {
  return list.map(item => {
    return {
      ...item,
      level: parentLevel + 1,
      children: addLevel(item.children || [], parentLevel + 1) 
    }
  })
}