[ylluminate]

Well, funny enough you can do rails with opal (they implemented Active Support (https://github.com/opal/opal-activesupport), which was kind of an answer to DHH and another before him thinking it couldn't be done, BUT... the real power comes from using it with something like rails. For example, we use it with rails 4.1rc2 at present to have ruby everywhere. So instead of just .js files or coffeescript, we have .js.rb files that pass through opal. Amazing readability improvements and a great feelings just going straight ruby across the board. There are some really slick little frameworks like `lissio` and `vienna` as well that offer `sinatra` like solutions right on opal.

The maker of `lissio` also started hacking on a little project that is not complete, but gives an idea of a WIP lissio project here: https://github.com/meh/gwentoo

Just kinda nice to see how it goes together and how very flexible it is.