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

<van-popup class="popup" show="{{ sheetTitle }}" custom-style="height: 100vh;" position="bottom" round closeable bind:close='sheetClose'>
    <view class="header">{{sheetTitle}}</view>
    <scroll-view scroll-y style="height:{{scrollHeight}}px;">
        <slot />
    </scroll-view>
</van-popup>