We will use another approach to create the builders and bikes routes in Angular. We will use child routes, also called nested views.
When you are using multiple children, it is pretty important to be careful with the route object order.
When the router receives a URL, it follows the contents in order, starting with the first element of the array; if it finds a match to the complete URL, it stops and instantiates the corresponding component(s).
In the next sections, you will see how to implement a well-known UI pattern called master detail page. We will make another component to help us organize the folder structure.