ERRORError: Uncaught (in promise): Error: Cannot match any routes. URL
Segment: 'Demo/ng2'
Error: Cannot match any routes. URL Segment: 'Demo/ng2'
   at Anonymous function

const routes: Routes = [
    {
        path: '',
        component: CatalogsComponent,
        pathMatch: 'full'
    }
];

export const appRoutingProviders: any[] = [];

// - Updated Export
export const routing = RouterModule.forRoot(routes);

constructor(
    public http: Http,
    public dataService: DataService,
    public router: Router
  ) { }

  ngOnInit() {
    this.dataService.getData()
      .subscribe(data => {
        // if (this.router.url == '') {
        //   this.catalog = true;
        // }

        this.itemData = data.Category;
      })
  }