If I navigate to a route without any optional parameters, the router link for that route is displayed as active. If I navigate to that same route with optional route parameters, the router link is no longer marked as active.

Example: http://plnkr.co/edit/LVYtuiQ8O2d52UrrxV2e?p=preview

As long as I'm on the Active route, its router link should be marked as active even if there are optional parameters included.