代码如下：

<el-form-item>
	<el-input v-model="formData.number" placeholder="请输入账号" clearable>
	   <el-select v-model="formData.type" slot="prepend" placeholder="请选择类型">
	     <el-option label="微信" value="1"></el-option>
	     <el-option label="支付宝" value="2"></el-option>
	     <el-option label="银行卡" value="3"></el-option>
	   </el-select>
	 </el-input>
</el-form-item>
//formData是入参对象，type是下拉框入参，number是账号输入框入参