idea 不能识别element-ui标签
/html
<div>
<el-cascader>
</el-cascader>
</div>
<div>
<el-cascader>
</el-cascader>
</div>
需要引入css,js,及font样式,如果没引入参照 https://blog.csdn.net/ziyu_nuannuan/article/details/122544948
另el-cascader需要options数据作为支撑
<el-cascader v-model="value" :options="options"></el-cascader>