@angular/router

app.component.html

<div class="container">
  <div class="starter-template">
    <!-- ... -->
    <router-outlet></router-outlet>
  </div>
</div>

app.module.ts

// ...
import { RoutingModule } from './routing.module';

@NgModule({
  declarations: [
    ...
  ],
  imports: [
    RoutingModule,
    ... 
  ],
  providers: [ ... ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }

routing.module.ts

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { AboutComponent } from './components/about/about.component';
import { HomeComponent } from './components/home/home.component';
import { PageNotFoundComponent } from './components/page-not-found/page-not-found.component';
import { ListTweetsComponent } from './components/tweets/list/tweets-list.component';

const routes: Routes = [
  { path: 'about', component: AboutComponent },
  { path: 'home', component: HomeComponent },
  { path: 'tweets', component: ListTweetsComponent },
  { path: '', redirectTo: '/tweets', pathMatch: 'full' },
  { path: '**', component: PageNotFoundComponent },
];

@NgModule({
  imports: [ RouterModule.forRoot(routes, { useHash: true }) ],
  exports: [ RouterModule ]
})

export class RoutingModule {}