中华人民共和国行政区划代码

github地址：https://github.com/uiwjs/province-city-china

中华人民共和国行政区划（五级）：省级、地级、县级、乡级和村级。来自中华人民共和国民政部，用于查询中国省，市和区数据的网站。

安装

npm install province-city-china --save-dev

使用

const { data, province, city, area, town } = require(‘province-city-china/data’);

代码实现

<template>
  <div>
    <el-cascader v-model="value" :options="options" @change="handleChange" />
  </div>
</template>

<script setup>
import { ref, onMounted } from 'vue'
import data from 'province-city-china/dist/level.json'

const value = ref([])
const options = ref([])

const handleChange = (value) => {
  console.log(value)
}
const dataList = data

const getAreaCode = (nodeId) => {
  const parents = findAllParents(
    dataList,
    { code: nodeId },
    (item, node) => item.code === node.code
    // {
    //   props: {
    //     children: 'child'
    //   }
    // }
  )

  let codes = []
  let names = []

  for (let node of parents) {
    codes.push(node.code)
    names.push(node.name)
  }

  codes.push(nodeId)
  let data = { codes: codes, names: names }
  return data
}

//json.js
const defaults = {
  props: {
    children: 'children'
  }
}

const findParent = (data, node, predicate, options = {}) => {
  let config = Object.assign({}, defaults, options)

  let parent = undefined
  for (let i = 0; i < data.length; i++) {
    if (parent) return parent

    let item = data[i]

    if (item[config.props.children] && item[config.props.children].length > 0) {
      let child = item[config.props.children].filter((c) => predicate(c, node))
      if (child.length > 0) {
        parent = item
      }

      if (parent === undefined) {
        parent = findParent(item[config.props.children], node, predicate, config)
      } else {
        break
      }
    }
  }
  return parent
}

const findAllParents = (data, node, predicate, options = {}) => {
  let config = Object.assign({}, defaults, options)

  let allParents = []
  let parent = findParent(data, node, predicate, config)
  while (parent !== undefined) {
    allParents.unshift(parent)
    parent = findParent(data, parent, predicate, config)
  }
  return allParents
}

onMounted(() => {
  options.value = data
  options.value = options.value.map((item) => {
    return {
      value: item.code,
      label: item.name,
      children: item.children?.map((item2) => {
        return {
          value: item2.code,
          label: item2.name,
          children: item2.children?.map((item3) => {
            return {
              value: item3.code,
              label: item3.name
            }
          })
        }
      })
    }
  })

  value.value = getAreaCode('420106').codes
})
</script>