elementUI实现省级联动

<div class="block">
          <span class="demonstration">现居住地：</span>
          <el-cascader
            v-model="valueCity"
            :props="{value: 'label',label:'label'}"
            :options="optionsData">
          </el-cascader>
          <el-input v-model="yform.now_address" placeholder="请输入详细地址" style="width: 220px;"></el-input>
        </div>

链接：https://pan.baidu.com/s/1h_11ihWmvYVh57tXlFCVoA
提取码：3na3
复制这段内容后打开百度网盘手机App，操作更方便哦
js 文件地址

import optionsData from "@/utils/optionCity.js"

data() {
return {
optionsData: optionsData
}
}