ScalaJS is awesome. Really solid and mature project, can totally recommend. It's especially worth if you want to write complicated business logic and prefer to

ScalaJS is awesome. Really solid and mature project, can totally recommend. It's especially worth if you want to write complicated business logic and prefer to use Scala and the whole ecosystem of JVM libraries to do that. The only thing that can be annoying is when you want to have a typesafe interface and have to write a lot of adapters for javascript libraries. Fortunately there is even a project that can make use of typescript interfaces for those libraries, so that you can use them from ScalaJS more or less automatically: https://scalablytyped.org/ https://scalablytyped.org/