content_copy
<ng-container *ngrxLet="observableNumber$; let n; let e = $error, let c = $complete">
<app-number [number]="n" *ngIf="!e && !c">
</app-number>
<ng-container *ngIf="e">
There is an error: {{e}}
</ng-container>
<ng-container *ngIf="c">
Observable completed: {{c}}
</ng-container>
</ng-container>