Rewrites and redirects do not need to be executed server-side ever since the html5 URL API. Of course you can redirect client-side, as in NextJS: router.push().

Rewrites and redirects do not need to be executed server-side ever since the html5 URL API. Of course you can redirect client-side, as in NextJS: router.push(). And given that redirects/rewrites work for the pages router also contradicts that point. But yes, you will need to add support within the webserver like nginx. A simple modification to `try_files` will do, and is probably present in most deployments anyway (because you will want URL routes like example.com/news instead of example.com/news.html). I think they just not considered that feature in the design of the app router. And I also don't think it is technically impossible to apply client-side redirects/rewrites within app router.