Set up route:

• const routes: Routes = [
  • {path: ”, component: HomeComponent}, //localhost:4200/
  • {path: ‘aaa’, component: AaaComponent, //localhost:4200/aaa
    • children: [
      • {path: ‘:id’, component: AaaSubComponent} //localhost:4200/aaa/abc(id is value)
    • ]} ,
  • {path: ‘**’, redirectTo: ‘/’}
• ]

import: RouterModule to app.module.ts file’s @NgModule({imports: [RouterModule.forRoot(routes)]})

You also can set up routing.module.ts file and then import to app.module.ts file