nova-live/projects/live-app/src/app/components/live/live.component.html

<div class="video_box" id="video-box" (click)="onTouch()">
  <div class="camera_box">
    <!-- 主屏 -->
    <div
      class="{{ changeScreen ? 'vice-video' : 'video' }}"
      id="video"
      width="100%"
      height="100%"
      (click)="onChangeScreen('big',$event)"
    >
    等待对方接通...
    </div>
    <!-- 副屏 -->
    <div
      class="{{ changeScreen ? 'video' : 'vice-video' }}"
      id="vice-video"
      width="100%"
      height="100%"
      (click)="onChangeScreen('small',$event)"
    >
      网络不佳
    </div>
  </div>
</div>