timer-example.component.ts

@Component({
  selector: 'app-timer-example',
  template: `
    <div>
      <app-timer *ngIf="alive"></app-timer>
    </div>
    <button (click)="destroy()" class="btn btn-danger">Destroy</button>
    <button (click)="revive()" class="btn btn-primary">Revive</button>
  `,
  styleUrls: ['./timer-example.component.scss']
})
export class TimerExampleComponent {

  public alive = true;

  public destroy() {
    this.alive = false;
  }

  public revive() {
    this.alive = true;
  }
}