MD_YOSwechat/packageA/project/delete.wxml

<view class="box">
    <view class="title">
        <text>*</text>请说明作废原因
    </view>
    <view class="content">
        <textarea placeholder="请说明作废原因" value="{{deletereason}}" bindinput="onInput" />
    </view>
</view>

<view class="footer">
    <van-button custom-class='custom' deletereason disabled='{{!deletereason}}' bindclick="handleDetele">提交</van-button>
</view>