angular-routing-module

1.routing-moduleを作成
CLI command
ng g module app-routing --flat --module=app

2.AppRoutingModuleを編集

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule, Routes } from '@angular/router';

//必要なコンポーネントをインポート

const routes: Routes = [
  { path: '', component: ChatComponent }, //初期表示
  { path: 'users', loadChildren: './users/users.module#UsersModule' },
  { path: '**', component: NotFoundComponent }, //ワイルドカード（該当しないURLの時）
];

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forRoot(routes)
  ],
  exports: [
    RouterModule
  ],
  declarations: []
})
export class AppRoutingModule { }