uni-ticket-system/dist/dev/mp-weixin/tmui/components/tm-app/tm-app.wxml

<view class="flex relative app flex-1 data-v-690d8382" style="{{a + ';' + b + ';' + c}}"><block wx:if="{{$slots.d}}"><slot></slot></block><block wx:else><text class="data-v-690d8382">在这里放置内容</text></block></view>