Ruby on Rails Roadmap

Yes you can, but you shouldn’t, you should learn some basic javascript before you learn rails. You can replace ruby and rails on the server-side by any other or language or framework, but you can’t replace client-side javascript. My advice is, learn at least enough javascript to understand ajax and basic dom manipulation, than learn rails.

Maybe providing the OP with links or online tutors on enough js to be useful for rails as to avoid the overlearning step developing in large frameworks.