Missing required variables are not detected

[seydu]

When a required path variable is not provided the router leaves the token in the generated url.
Say I have a route with the uri /page/{id}/edit. If I pass an empty params argument the generated uri will be /page/{id}/edit.
I think it is more helpful to detect the missing parameter and raise an error.

I see two options:
1/ Compile the routes server side and add the variables in the exported content
2/ Write JS code that compiles the route (maybe not a complete compilation as it is done server side, but extract enough information for this use case).