Angular 8 changes the way in which we lazily load routes from other modules

ng8-lazy-app-routing.module.ts

const routes: Routes = [
  {
    path: 'old-lazy',
    loadChildren: './old-lazy/old-lazy.module#OldLazyModule'
  },
  {
    path: 'new-lazy',
    loadChildren: () => import('./new-lazy/new-lazy.module')
      .then(m => m.NewLazyModule)
  }
];