textarea:<textarea class="add-form-item-input-area" data-form="formVal" name="YY_Note" id="YY_Note" auto-height bindblur="TextInput" value='{{formVal["YY_Note"]}}' placeholder="请输入咨询备注" />提交按钮:
https://developers.weixin.qq.com/miniprogram/dev/component/textarea.html 看下官方的代码片段