wechat-pilelog/vant/popup/popup.wxml

<view
  wx:if="{{ inited }}"
  class="custom-class {{ classes }} {{ utils.bem('popup', [position, { round, safe: safeAreaInsetBottom, safeTop: safeAreaInsetTop, safeTabBar: safeAreaTabBar }]) }}"
  style="{{ computed.popupStyle({ zIndex, currentDuration, display, customStyle }) }}"
  bind:transitionend="onTransitionEnd"
>
  <slot />
  <van-icon
    wx:if="{{ closeable }}"
    name="{{ closeIcon }}"
    class="close-icon-class van-popup__close-icon van-popup__close-icon--{{ closeIconPosition }}"
    bind:tap="onClickCloseIcon"
  />
</view>