mempool/frontend/src/app/components/blockchain/blockchain.component.html

<div class="text-center" class="blockchain-wrapper">
  <div class="position-container" [hidden]="(isLoading$ | async) === true">
    <span>
      <app-mempool-blocks></app-mempool-blocks>
      <app-blockchain-blocks></app-blockchain-blocks>
      <div id="divider"></div>
    </span>
  </div>
  <div *ngIf="(isLoading$ | async) === true" class="position-container loading">
    <div class="loading-block">
      <h3>Waiting for blocks...</h3>
      <div class="spinner-border text-light mt-2"></div>
    </div>
  </div>
</div>