chat-im/static/vant/weapp/lib/notify/index.wxml

<van-transition
  name="slide-down"
  show="{{ show }}"
  custom-class="van-notify__container"
  custom-style="z-index: {{ zIndex }};"
  bind:tap="onTap"
>
  <view
    class="van-notify van-notify--{{ type }}"
    style="background:{{ background }};color:{{ color }};"
  >
    <view
      wx:if="{{ safeAreaInsetTop }}"
      style="height: {{ statusBarHeight }}px"
    ></view>
    <text>{{ message }}</text>
  </view>
</van-transition>