2023-08-23 viewi tree 数据组装

把图中的数据循环 只要

{
  "provinces": [
    {
      "name":"陕西省",
      "code":"0000001",
      "citys": [
        {
          "name": "西安市",
          "code": "0000002",
          "areas": [
            {
              "name": "长安区",
              "code": "0000003"
            },
            {
              "name": "未央区",
              "code": "0000004"
            }
          ]
        },
        {
          "name": "渭南市",
          "code": "0000005",
          "areas": [
            {
              "name": "潼关县",
              "code": "0000006"
            },
            {
              "name": "蒲城县",
              "code": "0000007"
            }
          ]
        }
      ]
    },
    {
      "name":"山西省",
      "code":"0000008",
      "citys": [
        {
          "name": "太原市",
          "code": "0000009",
          "areas": [
            {
              "name": "小店区",
              "code": "0000010"
            },
            {
              "name": "晋源区",
              "code": "0000011"
            }
          ]
        },
        {
          "name": "大同市",
          "code": "0000012",
          "areas": [
            {
              "name": "平城区",
              "code": "0000013"
            },
            {
              "name": "云冈区",
              "code": "0000014"
            }
          ]
        }
      ]
    }
  ]
}

逻辑：多余的删除

let checkData = []
        treeData.forEach((item, index) => {
          let provinceOne = item.value.slice(0, 2) //当前的
          let provinceTwo = ''
          if (index > 0) {
            provinceTwo = treeData[index - 1].value.slice(0, 2)
            }
            //当前的和前一个对比字符串前2个一样
          if (provinceOne !== provinceTwo) {
            if (item.value.charAt(2) === '0' && item.value.charAt(3) === '0') {
              checkData.push({
                checked:item.checked,
                title:item.title,
                value:item.value,
                children:item.children,
              })
            }
          }
        })
        console.log('数据: ', checkData);
        checkData.forEach(function(item){ 
          item.children.forEach(city=> { 
              delete city.expand; 
              delete city.nodeKey; 
            city.children.forEach(area=> { 
              delete area.expand; 
              delete area.nodeKey; 
              delete area.children; 
            }); 
          }); 
        });
       
        console.log('1222: ',checkData);