<ng-container *ngIf="(blogPost$ | async) as blogPost; else loading">

  <h1>{{ blogPost.title }}</h1>
  <div>{{ blogPost.body }}</div>
  <ul>
    <li>{{ blogPost.creator }}</li>
    <li>{{ blogPost.dt }}</li>
  </ul>

</ng-container>
<ng-template #loading>Loading…</ng-template>