vue实现省市区三级联动

首先呈现效果图

1.我的是通过element-ui实现的；可自由选择UI

2.话不多说，直接上代码，结构非常简单

<el-form ref="form" :model="form" label-width="100px">
      <el-form-item  label="">
           一:vue实现城市联动选择
      </el-form-item>
      <el-form-item  label="">
           一:可清除输入框记录
      </el-form-item>
      <el-form-item  label="所在地区：" class="selform">
          <el-cascader
            :options="CityInfo"
            v-model="form.selectedOptions"
            :change-on-select="true"
            :clearable="true"
            :filterable="true"
            @change="handleChange">
           </el-cascader>
          <span>所选地区：{{form.city | myAddressCity}}{{form.erae | myAddressErae}}{{form.minerae | myAddressMinerae}}</span>
      </el-form-item>
 </el-form>

3.js部分（重点部分是实现字段的重重过滤）

el: "#app",
    data: {
        CityInfo: CityInfo,//地区数据
        form: {
            city: '',
            erae: '',
            minerae: '',
            selectedOptions: [],//地区筛选数组
        },
    },
    methods: {
        handleChange(value) {
            this.form.city = this.form.selectedOptions[0];
            this.form.erae = this.form.selectedOptions[1]
            this.form.minerae = this.form.selectedOptions[2]
        },
    },
    /*字段过滤*/
    filters: {
        myAddressCity: function (value) {
            for (y in this.CityInfo) {
                if (this.CityInfo[y].value == value) {
                    return value = this.CityInfo[y].label
                }
            }
        },
        myAddressErae: function (value) {
            for (y in this.CityInfo) {
                for (z in this.CityInfo[y].children) {
                    if (this.CityInfo[y].children[z].value == value && value != undefined) {
                        return value = this.CityInfo[y].children[z].label;
                    }
                }
            }
        },
        myAddressMinerae: function (value) {
            for (y in this.CityInfo) {
                for (z in this.CityInfo[y].children) {
                    for (i in this.CityInfo[y].children[z].children) {
                        if (this.CityInfo[y].children[z].children[i].value == value && value != undefined) {
                            return value = this.CityInfo[y].children[z].children[i].label
                        }
                    }
                }
            }
        },
    },

4.城市数据代码格式

{
		value: 1, label: '北京', children: [
			{
				value: 1, label: '北京市', children: [
					{ value: 1, label: '东城区' },
					{ value: 2, label: '西城区' },
					{ value: 3, label: '崇文区' },
					{ value: 4, label: '宣武区' },
					{ value: 5, label: '朝阳区' },
					{ value: 6, label: '丰台区' },
					{ value: 7, label: '石景山区' },
					{ value: 8, label: '海淀区' },
					{ value: 9, label: '门头沟区' },
					{ value: 10, label: '房山区' },
					{ value: 11, label: '通州区' },
					{ value: 12, label: '顺义区' },
					{ value: 13, label: '昌平区' },
					{ value: 14, label: '大兴区' },
					{ value: 15, label: '怀柔区' },
					{ value: 16, label: '平谷区' },
					{ value: 17, label: '密云县' },
					{ value: 18, label: '延庆县' }
				]
			}
		]
	},