Yup.  Using in production for a rather large monitoring UI via the awesome <a href="https:&#x2F;&#x2F;github.com&#x2F;japgolly&#x2F;scalajs-react" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;japgolly&#x2F;scalajs-react</a> project.  Nothing but good things to say about it.