在Angular中创建“子/嵌套”路由的更好方法？

<router-outlet></router-outlet>

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

import { ParentComponent } from './parent.component';
import { ChildComponent } from './child.component';

const routes: Routes = [
  {
    path: 'parent',
    component: ParentComponent,
    children: [
      {
        path: 'child',
        component: ChildComponent
      }
    ]
  }
];

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

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { ParentComponent } from './parent.component';
import { ChildComponent } from './child.component';
import { ParentRoutingModule } from './parent-routing.module';

@NgModule({
  declarations: [ParentComponent, ChildComponent],
  imports: [CommonModule, ParentRoutingModule],
  exports: [ParentComponent]
})
export class ParentModule { }