wxlitian/miniprogram/miniprogram_npm/tdesign-miniprogram/back-top/back-top.wxml

<view
  class="{{prefix}}-class {{classPrefix}} {{fixed ? prefix + '-is-fixed' : ''}} {{prefix + '-is-' + theme}}"
  bindtap="toTop"
>
  <t-icon wx:if="{{!!icon}}" class="{{classPrefix}}__icon {{prefix}}-class-icon" name="{{icon}}" />
  <view wx:if="{{!!text}}" class="{{classPrefix}}__text {{prefix}}-class-text"> {{text}} </view>
  <slot />
</view>