Thank you for mentioning Nim here. :)

To expand a bit, Nim features its own JS backend with a high proportion of the stdlib supporting it. You can access the DOM via the `dom` module[1] and build some pretty cool stuff[2][3]. It doesn't target WebAssembly (yet) however.

On the systems side, Nim compiles to C/C++/ObjC and manages memory via a soft real-time GC (or via a choice of other GCs including boehm).

1 - https://nim-lang.org/docs/dom.html

2 - https://nim-lang.org/araq/karax.html

3 - https://picheta.me/snake/ (source available here: https://github.com/dom96/snake)