Angular7添加路由及子路由方法

官方文档:
https://angular.io/guide/lazy-loading-ngmodules
关键词：路由、懒加载、特性模块

在angular5以上版本官方给的方法是新建两个带路由的模块，再在模块中添加组件，这样根路由包括这两个模块，各自模块又能找到路由，代码如下：

ng new customer --routing
ng generate module customers –routing
ng generate component customers/customer-list
ng generate module orders –routing
ng generate component orders/order-list

根页面HTML代码：

Customers
Orders
Home

找到各自模块需要在根路由中设置，注意loadChildren：
src/app/app-routing.module.ts

const routes: Routes = [
  {
    path: 'customers',
    loadChildren: './customers/customers.module#CustomersModule'
  },
  {
    path: 'orders',
    loadChildren: './orders/orders.module#OrdersModule'
  },
  {
    path: '',
    redirectTo: '',
    pathMatch: 'full'
  }
];

各自特性模块基本在创建组件时会import组件名称，基本不用管，只需在该模块的路由中添加子组件的路由：
src/app/customers/customers-routing.module.ts：

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

import { CustomerListComponent } from './customer-list/customer-list.component';


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

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

注意：path后是空格