CODE EXAMPLE FOR JAVASCRIPT

get ng content element angular 2

@Component({
  selector: 'upper',
  template: `<ng-content></ng-content>`
})
export class UpperComponent {
  constructor(private elt:ElementRef, private renderer:Renderer) {
  }

  ngAfterViewInit() {
    var textNode = this.elt.nativeElement.childNodes[0];
    var textInput = textNode.nodeValue;
    this.renderer.setText(textNode, textInput.toUpperCase());
  }
}