MD_YOSwechat/pages/threadedTree/modules/popup/index.wxml

<van-popup class="popup" show="{{ sheetTitle }}" custom-style="height: 100vh;" position="bottom" round safe-area-inset-bottom='{{false}}'>
    <view class="header">
        {{sheetTitle}}
        <view class="close" bindtap="sheetClose">
            <van-icon size='35rpx' name="cross" />
        </view>
    </view>
    <scroll-view scroll-y style="height:{{scrollHeight}}px;">
        <slot />
    </scroll-view>
</van-popup>