Apparently it does, though I'm learning about it for the first time in this thread also. Personally, I just run llama.cpp locally in docker-compose with anythingllm for the UI but I can see the appeal of having it all just run in the browser.

  https://github.com/mlc-ai/web-llm
  https://github.com/ngxson/wllama

Oh, interesting. Well, TIL.