updated example for [active-class-name](f00ad581a1/examples/active-class-name) to also support a `[slug].js` page that matches on `as` instead of `href` (as `href` would be `/[slug]`)
> This does not demo `[..slug].js` as this requires possible custom code for determining the slug path part for the active classname. i.e. page tree active nodes. A possible other example or another PR on this example.
Has possible information for:
* https://github.com/vercel/next.js/issues/7410
