Angular7RoutingExample. Angular 7 Routing and Sub Routing Tutorial With Example is today’s leading topic. If you want to navigate to different pages in your application, but you also want the application to be an SPA (Single Page Application), with no page reloading, then your app needs routing and angular makes it very easy. Routing means navigating between the pages. You have seen many websites with links that direct you to the new page. This can be achieved using routing.