While a bit rough around the edges, the full type safe server-client stack can be done in Scala with Play[0] + Scala.js[1] + ScalaCSS[2] I say rough because de

While a bit rough around the edges, the full type safe server-client stack can be done in Scala with Play[0] + Scala.js[1] + ScalaCSS[2] I say rough because despite Scala.js' fantastic performance characteristics, you're looking at 100kb file size off the bat; from there generated code size is reasonable, but that's a pretty big hit, particularly for cache challenged mobile clients. Otherwise, being able to tie Play's type safe reverse routing into the client is a big win. Previously with GruntJS + Coffeescript approach I'd get small file size, but complete lack of safety; just winging it with `routes.user.maybeNotExist(id)`. [0] https://github.com/playframework/playframework/ https://github.com/playframework/playframework/ [1] https://github.com/scala-js/scala-js https://github.com/scala-js/scala-js [2] https://github.com/japgolly/scalacss https://github.com/japgolly/scalacss