vue + elementUI实现省市县三级联动的方法示例

本文介绍了vue+elementUI实现省市县三级联动的方法示例，分享给大家，具体如下： 1、首

本文介绍了vue + elementUI实现省市县三级联动的方法示例，分享给大家，具体如下：

1、首先需要准备省市县json文件，网上有很多可以下载。项目中使用的city.json数据是这样的格式：

[
 {
 "value": "110000",
 "label": "北京市",
 "children": [
 {
 "value": "110000",
 "label": "北京市",
 "children": [
 {
 "value": "110101",
 "label": "东城区"
 },
 {
 "value": "110102",
 "label": "西城区"
 },
 {
 "value": "110105",
 "label": "朝阳区"
 },
 {
 "value": "110106",
 "label": "丰台区"
 },
 {
 "value": "110107",
 "label": "石景山区"
 },
 {
 "value": "110108",
 "label": "海淀区"
 },
 {
 "value": "110109",
 "label": "门头沟区"
 },
 {
 "value": "110111",
 "label": "房山区"
 },
 {
 "value": "110112",
 "label": "通州区"
 },
 {
 "value": "110113",
 "label": "顺义区"
 },
 {
 "value": "110114",
 "label": "昌平区"
 },
 {
 "value": "110115",
 "label": "大兴区"
 },
 {
 "value": "110116",
 "label": "怀柔区"
 },
 {
 "value": "110117",
 "label": "平谷区"
 },
 {
 "value": "110118",
 "label": "密云区"
 },
 {
 "value": "110119",
 "label": "延庆区"
 }
 ]
 }
 ]
 },
 {
 "value": "120000",
 "label": "天津市",
 "children": [
 {
 "value": "120000",
 "label": "天津市",
 "children": [
 {
 "value": "120101",
 "label": "和平区"
 },
 ......

2、创建一个组件开始写代码

<template>
 <div class="linkage">
 <div>
 <el-select v-model="selectProvince" filterable size="small" @change="selectProvinceFun($event)" placeholder="请选择省份">
 <el-option value="" label="请选择省份"></el-option>
 <el-option :value="item" :label="item.label" v-for="(item, index) in city" :key="index"></el-option>
 </el-select>
 </div>
 <div>
 <el-select v-model="selectCity" filterable size="small" @change="selectCityFun($event)" placeholder="请选择城市">
 <el-option value="" label="请选择城市"></el-option>
 <el-option :value="item" :label="item.label" v-for="(item, index) in cityList" :key="index"></el-option>
 </el-select>
 </div>
 <div>
 <el-select v-model="selectArea" filterable size="small" @change="selectAreaFun($event)" placeholder="请选择区县">
 <el-option value="" label="请选择区县"></el-option>
 <el-option :value="item" :label="item.label" v-for="(item, index) in areaList" :key="index"></el-option>
 </el-select>
 </div>
 </div>
</template>
<script>
import city from '@/assets/json/city.json'
export default {
 name: 'linkage',
 data () {
 return {
 // 整个省市县数据
 city: city,
 // 被选中的市数据
 cityList: [],
 // 被选中的县数据
 areaList: [],
 selectProvince: {},
 selectCity: {},
 selectArea: {}
 }
 },
 mounted () {
 },
 methods: {
 // 省份 市 县联动
 selectProvinceFun (event) {
 console.log(event)
 if (event) {
 this.cityList = event.children
 } else {
 this.cityList = []
 }
 this.areaList = []
 this.$emit('getLawyerListInfo', [event.label, 'province'])
 },
 selectCityFun (event) {
 console.log(event)
 if (event) {
 this.areaList = event.children
 } else {
 this.areaList = []
 }
 this.$emit('getLawyerListInfo', [event.label, 'city'])
 },
 selectAreaFun (event) {
 console.log(event)
 this.$emit('getLawyerListInfo', [event.label, 'area'])
 }
 }
}
</script>
<style lang="scss" scoped>
 .linkage {
 display: flex;
 div {
 margin-right: 5px;
 }
 }
</style>

总结：整个过程很简单，就是在选中省的时候获取他的所有children节点数据（市）在选择市的时候获取她的所有children节点数据（区县）

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。