As we already know, in order to bootstrap any Angular application, we need to develop a root NgModule and a bootstrap component. The "Coders repository" application is not any different; the only addition in this specific case is that we will have multiple pages that need to be connected together with the Angular router.

Let's start with the imports required for the router's configuration and define the root component right after this:

// ch6/ts/step-0/app.ts
 
import {
  APP_BASE_HREF,
  LocationStrategy,
  HashLocationStrategy
} from '@angular/common';

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

In the preceding snippet, we import the RouterModule directly from @angular/router; as we can see, the router is externalized outside the framework's core. This module declares all the routing-specific directives, as well as all the routing-related providers, which means that, if we import it, we'll get access to all of...