Html5/Javascript frameworks/server side JS Framework vs Ruby on Rails?

My question is if a developer only knows either Html5/Javascript frameworks/server side JS Framework or Ruby on Rails, which skill set will allow him to develop the best web apps or provide grea开发者_开发问答ter creativity on the web?

Regards

For developing a basic web application you should know about

1) Html
2) and one server side technology ( Ruby on Rail/ PHP/ java / Paython etc.. )

When it comes to decorate your web application you need

1) Css
2) Javascript framework

In your case first skill set will provide you more freedom to fly in the world of web.