Angular Routing Routing with children

Example

I found this to be the way to properly nest children routes inside the app.routing.ts or app.module.ts file (depending on your preference). This approach works when using either WebPack or SystemJS.

The example below shows routes for home, home/counter, and home/counter/fetch-data. The first and last routes being examples of redirects. Finally at the end of the example is a proper way to export the Route to be imported in a separate file. For ex. app.module.ts

To further explain, Angular requires that you have a pathless route in the children array that includes the parent component, to represent the parent route. It's a little confusing but if you think about a blank URL for a child route, it would essentially equal the same URL as the parent route.

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

import { HomeComponent } from "./components/home/home.component";
import { FetchDataComponent } from "./components/fetchdata/fetchdata.component";
import { CounterComponent } from "./components/counter/counter.component";

const appRoutes: Routes = [
    {
        path: "",
        redirectTo: "home",
        pathMatch: "full"
    },
    {
        path: "home",            
        children: [
            {
                path: "",
                component: HomeComponent
            },
            {
                path: "counter",                    
                children: [
                    {
                        path: "",
                        component: CounterComponent
                    },
                    {
                        path: "fetch-data",
                        component: FetchDataComponent                            
                    }
                ]
            }
        ]
    },
    {
        path: "**",
        redirectTo: "home"
    }
];

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

Great Example and Description via Siraj