region-tree-data/src/index.js

`npm install region-tree-data` <br> 或 <br> `yarn add region-tree-data`

import REGION_DATA from './index_2019__level_3.json'
import cloneDeep from 'lodash/cloneDeep'

let CodeToText = {}
let TextToCode = {}
let regionData = []
let provinceAndCityData = []
// const totalObj = {}
CodeToText[''] = '全部'
let provinceAndCityDataPlus = []
let regionDataPlus = []
let originData = cloneDeep(REGION_DATA)
export function isNumber(value) {
  return typeof value === 'number' && !isNaN(value)
}

function getByArea(area, data = cloneDeep(originData), level = 1) {
  if (!isNumber(area) || area < 1) {
    return data
  }
  return data.map(item => {
    if (area === level) {
      if (item.children) {
        delete item.children
      }
      return item
    } else {
      if (item.children) {
        item.children = getByArea(area, item.children, level + 1)
      }
      return item
    }
  })
}

function watchData(data, child) {
  return data.map(item => {
    Object.assign(CodeToText, { [item.value]: item.label })
    Object.assign(child || TextToCode, { [item.label]: { code: item.value }})
    if (item.children) {
      watchData(item.children, child ? child[item.label] : TextToCode[item.label])
    }
  })
}
function setData(data) {
  initData(data)
  originData = data
}
function initData(data) {
  CodeToText = {}
  TextToCode = {}
  watchData(cloneDeep(data))
  // setProvinceAndCityData(data)
  provinceAndCityData = getByArea(2, cloneDeep(data))
  provinceAndCityDataPlus = cloneDeep(provinceAndCityData)
  provinceAndCityDataPlus.unshift({ label: '全部', value: '' })
  regionData = cloneDeep(data)
  regionDataPlus = cloneDeep(data)
  regionDataPlus.unshift({ label: '全部', value: '' })
}
setData(originData)
export { setData, getByArea, provinceAndCityData, regionData, provinceAndCityDataPlus, regionDataPlus, CodeToText, TextToCode }