Angular2モジュールの遅延読み込み例の詳細説明

cd src/app/
mkdir home
cd home
ng g module home
ng g component home

import {Routes, RouterModule} from "@angular/router";
import {HomeComponent} from "./home/home.component";
import {NgModule} from "@angular/core";

const routes: Routes=[
 {
  path:'',
  component:HomeComponent
 }
]

@NgModule({
 imports:[RouterModule.forChild(routes)],
 exports:[RouterModule],
 providers:[]

})
export class HomeRoutingModule{}

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { HomeComponent } from './home/home.component';
import {HomeRoutingModule} from "./home-routing.module";

@NgModule({
 imports: [
  CommonModule,
  HomeRoutingModule
 ],
 declarations: [HomeComponent]
})
export class HomeModule { }

import {NgModule} from "@angular/core";
import {Routes, RouterModule} from "@angular/router";
import {UserListComponent} from "./user/user-list/user-list.component";
import {UserDetailComponent} from "./user/user-detail/user-detail.component";
import {RxjsComponent} from "./rxjs/rxjs.component";
import {UserEditComponent} from "./user/user-edit/user-edit.component";
import {environment} from "../environments/environment";

const routes: Routes = [
 {
  path:'home',
  loadChildren:'app/home/home.module#HomeModule'
 }

];

@NgModule({
 imports: [RouterModule.forRoot(routes,{ useHash: environment.useHash })],
 exports: [RouterModule],
 providers: []
})
export class AppRoutingModule { }