routerLink and routerLinkActive

<a routerLink='\userProfile' routerLinkActive='activeMenuOption'> Profile </a>

<a routerLink='\userAlbums' routerLinkActive='activeMenuOption'> Albums </a>

In angular app, you should use routerLink directive with a tag instead of using href to navigate to another view in the app. routerLinkActive directive allows us to specify the css class that we may want to apply to the link when that link's path is activated/user navigates to that link.