anchor.diff:      });
     }
   
  +  @override
     void ngAfterViewInit() {
       /**
        * Make sure nav doesn't overflow container scrollbar
  
positive.code:     selector: 'd-navbar',
      styleUrls: const ['d_navbar.css'],
      templateUrl: 'd_navbar.html')
  class NavbarComponent implements AfterViewInit {
    NavbarComponent(this.host) {
      _parentElement = host.parent;
      _parentElement.onScroll.listen((event) {
        if (alwaysShow)
          offset = 0;
  
negative.code: 
    @Input()
    bool alwaysShow = false;
  
    @Input()
    bool trackDocument = false;
  }
  