werun-wxapp/miniprogram_npm/@vant/weapp/index-anchor/index.wxml

<view
  class="van-index-anchor-wrapper"
  style="{{ wrapperStyle }}"
>
  <view
    class="van-index-anchor {{ active ? 'van-index-anchor--active van-hairline--bottom' : '' }}"
    style="{{ anchorStyle }}"
  >
    <slot wx:if="{{ useSlot }}"/>
    <block wx:else>
      <text>{{ index }}</text>
    </block>
  </view>
</view>