当二级联动比如选择国家的时候,希望选中一个国家的时候后面城市默认选中第一个城市,则给国家的select加一个@change事件就可以了
<div class="inputLine">
<span>所在区域</span>
<select name="" v-model="countryName" @change="selectCountry">
<option :value="item" v-for="(item,index) in area">
{{item.country}}
<svg class="icon icon-arrow-bottom" aria-hidden="true">
<use xlink:href="#icon-arrow-bottom" rel="external nofollow" rel="external nofollow" ></use>
</svg>
</option>
</select>
<select name="" v-model="cityName">
<option :value="item" v-for="(item,index) in countryName.city">
{{item}}
<svg class="icon icon-arrow-bottom" aria-hidden="true">
<use xlink:href="#icon-arrow-bottom" rel="external nofollow" rel="external nofollow" ></use>
</svg>
</option>
</select>
</div>
data
countryName:{},
cityName:"请选择城市",
area:[
{
"country":"美国",
"city":[
"纽约",
"洛杉矶",
"旧金山",
"西雅图",
"波士顿",
"休斯顿",
"圣地亚哥",
"芝加哥",
"其它",
]
},
{
"country":"加拿大",
"city":[
"温哥华",
"多伦多",
"蒙特利尔",
"其它"
]
},
{
"country":"澳大利亚",
"city":[
"悉尼",
"墨尔本",
"其它"
]
},
{
"country":"新加坡",
"city":[
"新加坡"
]
},
/*{
"country":"中国",
"city":[
"北京市",
]
},*/
],
methods:
selectCountry(value){
this.cityName=this.countryName.city[0];
},
以上这篇vue select二级联动第二级默认选中第一个option值的实例就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持软件开发网。