在Angular 4中定义路由

import { RouterModule, Routes } from '@angular/router';

@NgModule({
  imports: [
    RouterModule.forRoot(routes)
  ],
  ...
})
export class AppModule { }

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

import { HomeComponent } from './home.component';
import { AboutComponent } from './about.component';

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

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

<router-outlet></router-outlet>