vant-weapp/lib/image/index.wxml

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

<view
  class="custom-class {{ utils.bem('image', { round })}}"
  style="{{ style }}"
  bind:tap="onClick"
>
  <image
    wx:if="{{ !error }}"
    class="image-class van-image__img"
    mode="{{ mode }}"
    src="{{ src }}"
    lazy-load="{{ lazyLoad }}"
    show-menu-by-longpress="{{ showMenuByLongpress }}"
    bind:load="onLoad"
    bind:error="onError"
  />

  <div
    wx:if="{{ loading && showLoading }}"
    class="loading-class van-image__loading"
  >
    <slot
      wx:if="{{ useLoadingSlot }}"
      name="loading"
    />
    <van-icon
      wx:else
      name="photo-o"
      size="22"
    />
  </div>
  <div
    wx:if="{{ error && showError }}"
    class="error-class van-image__error"
  >
    <slot
      wx:if="{{ useErrorSlot }}"
      name="error"
    />
    <van-icon
      wx:else
      name="warning-o"
      size="22"
    />
  </div>
</view>