Ask HN: Non-JavaScript web front end development in 2018

What's the current state of the art for web frontend development using a better language than JavaScript?

I'm aware of Elm and Clojure as well as older efforts like GWT. I'm also aware of promising but immature efforts like GopherJS. Anything else out there that's mature and usable and that offers more than just bare bones?

I've become rather deeply disillusioned with dynamic languages and am looking for some way to get UI development back into a world where bugs can be caught at compile time and where there is some structural convention around the code.