Update jupyterlab-ihaskell for 4.x

[vaibhavsagar]

No description provided.

[krassowski]

Came here from community forum, some super quick notes from reading code alone.

[krassowski]

Why wrap with Promise.resolve?

Suggested change

	const hs = await Promise.resolve(import('@codemirror/legacy-modes/mode/haskell'));
	const hs = await import('@codemirror/legacy-modes/mode/haskell');

[vaibhavsagar]

Your code (which I based this off) had Promise.all with multiple imports, but I only care about one import. I've moved to importing this at the top of my file but that doesn't seem to be making a difference.

[vaibhavsagar]

Thanks for your help! I think I've made all the changes you suggested here but I'm still getting a blank screen and exactly the same error message. Any more ideas?

[erkin98]

did you fix it @vaibhavsagar ?

[vaibhavsagar]

No, this PR doesn't work yet.

[erkin98]

No, this PR doesn't work yet.

how can i reproduce?

[vaibhavsagar]

You can run

$ nix build -L .#ihaskell-env-ghc94

on this branch to build a JupyterLab environment with IHaskell and jupyterlab-ihaskell installed. To make changes to jupyterlab-ihaskell, follow the instructions in that directory's README.

[vaibhavsagar]

I need to reinstate the R modes and the :! behaviour, but for now this is good enough and already an improvement over the existing lack of syntax highlighting.