使用elementUI制作三级级联城市选择器

<div id="app">
　　<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.area | myAddressArea}}{{form.minarea | myAddressMinarea}}</span>
</div>

 1     const app = new Vue({
 2       el: ‘#app‘,
 3       data: {
 4         CityInfo: CityInfo,
 5         form: {
 6           city: ‘‘,
 7           area: ‘‘,
 8           minarea: ‘‘,
 9           selectedOptions: [],//地区筛选数组
10         },
11       },
12       created() {
13       },
14       methods: {
15         handleChange(value) {
16           this.form.city = this.form.selectedOptions[0];
17           this.form.area = this.form.selectedOptions[1]
18           this.form.minarea = this.form.selectedOptions[2]
19         },
20　　　　},
20       filters: {
21         myAddressCity: function (value) {
22           for (y in this.CityInfo) {
23             if (this.CityInfo[y].value == value) {
24               return value = this.CityInfo[y].label
25             }
26           }
27         },
28         myAddressArea: function (value) {
29           for (y in this.CityInfo) {
30             for (z in this.CityInfo[y].children) {
31               if (this.CityInfo[y].children[z].value == value && value != undefined) {
32                 return value = this.CityInfo[y].children[z].label;
33               }
34             }
35           }
36         },
37         myAddressMinarea: function (value) {
38           for (y in this.CityInfo) {
39             for (z in this.CityInfo[y].children) {
40               for (i in this.CityInfo[y].children[z].children) {
41                 if (this.CityInfo[y].children[z].children[i].value == value && value != undefined) {
42                   return value = this.CityInfo[y].children[z].children[i].label
43                 }
44               }
45             }
46           }
47         },
48       },
49     })