does jsf work when javascript is disabled?

I am investigating the ability of jsf to work when javascript is disabled and there are conflicting options.
Does anyone have a take here?

Welcome to the JavaRanch, Andy!

Basic standard JSF does not use or need JavaScript. JSF2 has some JavaScript support, but that's mostly for AJAX, I think, and AJAX doesn't work without JavaScript enabled on any platform.

There are third-party tag libraries such as RichFaces that use (and generate) JavaScript, but how well they work depends on how the library was developed. Ideally, a tag library should revert to non-JSF equivalents where possible if it detects that JavaScript was disabled, but I'm not sure how well any of them do that.