angular-module-level-routing-container

feature-module-a-routing.module.ts

const routes: Routes = [
  { 
    //Default redirection to the first route.
    path: '',
    redirectTo: 'page-a1',
    pathMatch: 'full'
  },
  {
    path:'',
    component: FeatureModuleAContainerComponent,
    children: [
      //Loading the page components for each page route.
      {
        path: 'page-a1',
        component: PageA1Component
      },
      {
        path: 'page-a2',
        component: PageA2Component
      },
      {
        path: 'page-a3',
        component: PageA3Component
      },
      {
        path: 'page-a4',
        component: PageA4Component
      }
    ]
  }
];