递归结构json取出所有id最大值

Question

怎么获取所有的value值，并取出最大值呢
数据引用递归结构的json取指定的值？

[
  {
    "label": "上海",
    "value": 310000,
    "children": [
      {
        "label": "上海",
        "value": 310100,
        "children": [
          {
            "label": "金山",
            "value": 310116,
            "children": [
              {
                "label": "测试123123",
                "value": 133
              }
            ]
          },
          {
            "label": "黄浦",
            "value": 310101,
            "children": [
              {
                "label": "测试播放系统",
                "value": 123
              },
              {
                "label": "DreamFitness",
                "value": 130
              }
            ]
          },
          {
            "label": "闵行",
            "value": 310112,
            "children": [
              {
                "label": "测试1",
                "value": 128
              },
              {
                "label": "纽绍客",
                "value": 129
              }
            ]
          },
          {
            "label": "浦东",
            "value": 310115,
            "children": [
              {
                "label": "兼容场馆",
                "value": 125
              }
            ]
          },
          {
            "label": "徐汇",
            "value": 310104,
            "children": [
              {
                "label": "美奂旗舰店",
                "value": 122
              },
              {
                "label": "开发测试",
                "value": 124
              },
              {
                "label": "欣欣向荣",
                "value": 126
              },
              {
                "label": "魏叶的场馆",
                "value": 127
              },
              {
                "label": "测试",
                "value": 131
              },
              {
                "label": "测试2",
                "value": 132
              }
            ]
          }
        ]
      }
    ]
  }
]

Answer 1

你得问问后端老哥
省市区这等类型的区域数据存储，现在基本都是单条记录，分表或单表存储的
也就是说接口返回给你，是原本一维的数据做了group分组的

不方便的话，自己顶层排个序，取末尾的最深层最大值吧

Answer 2

let maxNum = 0; //最大的value
const vals = [] //所有的value
    const fun = arr => {
      arr.forEach(item => {
        if (item.value > maxNum) maxNum = item.value;
        vals.push(item.value)
        if (item.children) fun(item.children);
      });
    };
    fun([{value:1},{value:3}]);

Answer 3

找到一个做法，外部传入空数组，但不懂为什么

generateIdList(menus, res) {
  for (const menu of menus) {
    const { resId, children } = menu
    res.push(resId)
    if (children) {
      res = generateIdList(children, res)
    }
  }
  return res
}
generateIdList(data, [])

Answer 4

https://wintc.top/article/26