Hey, just got into playing with the new JS backend so I remembered that miso exists. Do you need any help with getting it to work with the new JS backend? I should be able to put in some work on both Haskell and Nix side if you could point me in the right direction.

Hi @mastarija. Thanks for asking, and sure.

Right now miso does seem to work with both the (latest) JS backend and the WASM backend. The hard part is acquiring the compilers. This has now gotten a lot easier with tools like GHCUp and Flakes.

nix shell 'gitlab:haskell-wasm/ghc-wasm-meta?host=gitlab.haskell.org'

This PR is moreso about bringing miso's nixpkgs into modernity (think our hash is from 2018) and miso still cuts its releases from GHCJS 8.6 (since that ime is most stable - this might no longer be the case with the new backend). So miso aside, a lot of other stuff we depend on has either changed dramatically or been dropped outright (closure-compiler, NixOS testing framework, nixops has also been dropped - will need to resurrect that). So that's what this PR is about mostly.

If you'd like to get involved on the edge of development there are some opportunities.

One thing we have added recently that I would like to see more large-scale usage of is locally-stateful React-style components via existential quantification. This should open the door to integrating nicely with components from CSS-only frameworks like Bulma, Tailwind's DaisyUI component library and Flowbite. These websites have the component rendered side-by-side with the JS / TS code. I would like to have an example of the same, except the components are rendered side-by-side with the miso code. I think this will help spur adoption of Haskell in the broader community as well.

If you do this we could host it at one of our subdomains. This is what @ptigwe did for the 2048 example and flatris

This would also be a good demonstration of the notify (message passing between components) / sample functions (accessing other component states) that were added. You can find more examples of that in the examples/components sub folder (very crude though).

Also, feel free to join our matrix.org server if you'd like to discuss in more depth, but that's where my heads at right now.

Closed in favor of #855