Yeppers - https://github.com/treeform/nim_emscripten_tutorial

FWIW, people have been doing that for about as long as there's even been an emscripten, but the article is pointing out the lack of more tight integration with stdlib/std compilation toolchains. I would say evolving/growing the stdib in general is a pain point. Both the language and compiler are more flexible than most, though. So, this matters less in Nim that it might otherwise.