I think that actually for performance reasons (for an entire system, not just a web page) it's reasonable to require JavaScript to be enabled. For example, hav

I think that actually for performance reasons (for an entire system, not just a web page) it's reasonable to require JavaScript to be enabled. For example, having a page that provides 90% of the information statically (potentially to a level deemed functional without js) is great because you can heavily cache user-unrelated content. Then use JavaScript to query for user-specific content and fill out the page. This functionality may be needed for important features (paywalls, adding to favorites, etc). That said, if you really wanted to work around not having JS enabled you could make it work -- but you need to optimize where you put your efforts.