From "WebR – R in the Browser" (2025 https://news.ycombinator.com/item?id=44999706 :

> jupyterlite-xeus builds jupyterlite, Jupyter xeus kernels, and the specified dependencies to WASM with packages from conda-forge or emscripten-forge.

jupyterlite/xeus https://github.com/jupyterlite/xeus

There may be an easy way to wrap GHC with jupyterlite/xeus, with Haskell's lazy evaluation; xeus-haskell or xeus-ghc?