解决方案:
<el-form-item label="经纬度:" prop="latitudeAndLongitude">
<el-input type="text" class="width100" v-model="merInfoForm.latitudeAndLongitude" placeholder="示例:121.42,31.16" @input="changeMessage($event)"></el-input>
<a href="https://lbs.amap.com/tools/picker" target="_blank" >经纬度查询链接</a>
</el-form-item>
// 强制更新测试文本信息框的值
changeMessage() {
this.$forceUpdate()
},