What are some exciting compile to Js languages?

I mostly work with javascript and I and looking to learn a new language, better if it is compile to js, then I can use it in my projects.

P.s. I'm already using typescript

Comments

[Avalander]

I think there's a compiler for almost anything to Javascript nowadays. A couple of my favourites are ReasonML, PureScript and Scala.js, of course.

[Saurabh Sharma]

I think I need to try them one after another, because the ecosystem is bigger than I thought