Awesome work! I've been using scalajs ad mid-sized personal projects and it's been absolute joy to work with. I use
<a href="https://laminar.dev/" rel="nofollow">https://laminar.dev/</a> (don't need no react)
and to interface with javascript world
<a href="https://scalablytyped.org/" rel="nofollow">https://scalablytyped.org/</a>
- although I rarely need to use external libraries