Brother.component.html

<fieldset>
  <legend>
    <h1>Brother Component</h1>
  </legend>
  <p>Message to send to anybody</p>
  <input type="text" [(ngModel)]="inputText" (keyup.enter)="onClick()" />
  <button (click)="onClick()">Submit</button>

  <div *ngIf="sisterMessage$ | async as sisterMessage">
    <p>Sister said: {{ sisterMessage }}</p>
  </div>
</fieldset>