<!doctype html>
<html lang="en">
<head>
<title>省市县</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- 内网Vue.js -->
<script src="D:\WebCode\Vue.js"></script>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>
<body>
<!-- 容器 -->
<div id="app" class="container">
<!-- 行 -->
<div class="col-lg-4">
<!-- 下拉框 -->
<div class="form-group">
<label for="">省</label>
<select
v-model="province"
class="form-control" name="" id="">
<option v-for="(item, index) in provinceList" :key="index" :value="index">{{item}}</option>
</select>
</div>
</div>
<div class="col-lg-4">
<label for="">市</label>
<select v-model="city" class="form-control" name="" id="">
<option v-for="(item, index) in a2" :key="index" :value="index">{{item}}</option>
</select>
</div>
<div class="col-lg-4">
<label for="">县</label>
<select v-model="county" class="form-control" name="" id="">
<option v-for="(item, index) in a3" :key="index" :value="index">{{item}}</option>
</select>
</div>
</div>
<script>
let vm=new Vue({
el:'#app',
data: {
county:'',
city:'',
province:'',
provinceList:["湖北省", "湖南省", "广东省"],
citylist:[["武汉市", "宜昌市", "咸宁市"], ["长沙市", "常德市", "邵阳市"], ["广州市", "深圳市", "惠州市"]],
countyList: [[["武昌区", "洪山区"], ["夷陵区", "西陵区"], ["咸安区"]],
[["芙蓉区", "雨花区", "岳麓区"], ["鼎城区"], ["双清区"]], [["荔湾区", "白云区"], ["福田区","保安区","龙岗区"], ["惠阳区"]]],
},
computed: {
a2:function(){
return this.citylist[this.province];
},
a3:function(){
if(this.city!=='')
return this.countyList[this.province][this.city];
}
},
})
</script>
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<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
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crossorigin="anonymous"></script>
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crossorigin="anonymous"></script>
</body>
</html>
