shenweishi/node_modules/@vant/weapp/lib/field/index.wxml

<wxs src="../wxs/utils.wxs" module="utils" />
<wxs src="./index.wxs" module="computed" />

<van-cell
  size="{{ size }}"
  icon="{{ leftIcon }}"
  center="{{ center }}"
  border="{{ border }}"
  is-link="{{ isLink }}"
  required="{{ required }}"
  clickable="{{ clickable }}"
  title-width="{{ titleWidth }}"
  title-style="margin-right: 12px;"
  custom-style="{{ customStyle }}"
  arrow-direction="{{ arrowDirection }}"
  custom-class="van-field"
>
  <slot name="left-icon" slot="icon" />
  <view wx:if="{{ label }}" class="label-class {{ utils.bem('field__label', { disabled }) }}" slot="title">
    {{ label }}
  </view>
  <slot wx:else name="label" slot="title" />
  <view class="{{ utils.bem('field__body', [type]) }}">
    <view class="{{ utils.bem('field__control', [inputAlign, 'custom']) }}" bindtap="onClickInput">
      <slot name="input" />
    </view>
    <include wx:if="{{ type === 'textarea' }}" src="./textarea.wxml" />
    <include wx:else src="./input.wxml" />

    <van-icon
      wx:if="{{ showClear }}"
      name="{{ clearIcon }}"
      class="van-field__clear-root van-field__icon-root"
      catch:touchstart="onClear"
    />
    <view class="van-field__icon-container" bind:tap="onClickIcon">
      <van-icon
        wx:if="{{ rightIcon || icon }}"
        name="{{ rightIcon || icon }}"
        class="van-field__icon-root {{ iconClass }}"
        custom-class="right-icon-class"
      />
      <slot name="right-icon" />
      <slot name="icon" />
    </view>
    <view class="van-field__button">
      <slot name="button" />
    </view>
  </view>
  <view wx:if="{{ showWordLimit && maxlength }}" class="van-field__word-limit">
    <view class="{{ utils.bem('field__word-num', { full: value.length >= maxlength }) }}">{{ value.length >= maxlength ? maxlength : value.length }}</view>/{{ maxlength }}
  </view>
  <view wx:if="{{ errorMessage }}" class="{{ utils.bem('field__error-message', [errorMessageAlign, { disabled, error }]) }}">
    {{ errorMessage }}
  </view>
</van-cell>