mempool/frontend/src/app/components/mempool-block-overview/mempool-block-overview.component.html

<div class="mempool-block-overview">
  <canvas class="block-overview" [style.width]="cssWidth + 'px'" [style.height]="cssHeight + 'px'" #blockCanvas></canvas>
  <div class="loader-wrapper" [class.hidden]="!(isLoading$ | async)">
    <div class="spinner-border ml-3 loading" role="status"></div>
  </div>
</div>