weixin/miniprogram_npm/lin-ui/form-item/index.wxml

<view class="l-form-item-class form-item-container {{'label-' + labelPlacement}} {{tipType === 'text' ? 'textHeight': ''}}">
    <view class="l-form-label-class label-text {{isRequired ? 'label-text-required': ''}} {{'label-text-' + labelPlacement+ '-' + alignItems}}" style="min-width: {{labelPlacement==='row' ? labelWidth : '100%'}};max-width: {{labelPlacement==='row' ? labelWidth : '100%'}}">
        <view wx:if="{{labelSlot}}">
            <slot name="label"/>
        </view>
        <view wx:else>
            {{label}}
        </view>
    </view>
    <view class="label-content l-form-content-class">
        <slot/>
    </view>
    <l-error-tip class="error-text" l-error-text-class="l-error-text-class" errorText="{{errorText}}" wx:if="{{errorText}}"/>
</view>