ViewChild & ContentChild in Angular

// ViewChild - Access child in template
@Component({
  selector: 'app-parent',
  template: \`
    <app-child #childRef></app-child>
    <button (click)="callChildMethod()">Call Child</button>
  \`
})
export class ParentComponent {
  @ViewChild('childRef') child: ChildComponent;
  @ViewChild(ChildComponent) childByType: ChildComponent;

  callChildMethod() {
    this.child.doSomething();
  }
}