GHC JS browser introduction blog post/tutorial

[JoshMeredith]

No description provided.

[hsyl20]

It looks good, thanks Josh!

[doyougnu]

just a few minor things, no big restructuring! Good Job!

[hsyl20]

As discussed in the GHC call, we should probably document clearly that the JS backend isn't feature complete yet to lower expectations (mentioning missing TH, etc.).

[JoshMeredith]

As discussed in the GHC call, we should probably document clearly that the JS backend isn't feature complete yet to lower expectations (mentioning missing TH, etc.).

Is this appropriate for the conclusion section?

[hsyl20]

As discussed in the GHC call, we should probably document clearly that the JS backend isn't feature complete yet to lower expectations (mentioning missing TH, etc.).

Is this appropriate for the conclusion section?

At the end of the introduction perhaps to be sure that most people read it?

[Swordlash]

Hey, is this possible to also add a small example of passing Haskell callback into foreign code? Something along the lines of

setOnBodyClick :: IO () -> IO ()
setOnBodyClick callback = ... some function calling document.body.onclick = (() => callback ())

(is it possible yet in the alpha?)

[hsyl20]

Hey, is this possible to also add a small example of passing Haskell callback into foreign code? Something along the lines of

setOnBodyClick :: IO () -> IO ()
setOnBodyClick callback = ... some function calling document.body.onclick = (() => callback ())

(is it possible yet in the alpha?)

Hey, I was planning to answer your original comments about this (https://discourse.haskell.org/t/ghc-js-backend-calling-haskell-callback-in-a-foreign-function/5591) :)

I don't think this is supported yet. We've only ported basic foreign imports, not foreign exports nor magical foreign imports (wrapper, etc.).

[Swordlash]

Oh sorry, I thought you may have not seen it. Sorry then for polluting the PR.

[hsyl20]

Oh sorry, I thought you may have not seen it. Sorry then for polluting the PR.

No problem! Thanks for trying the backend and for the nudge! :-) We'll try to prioritize foreign exports and to publish a blog post about them as soon as they are supported.

[hsyl20]

I've left a few more comments.

Some of @doyougnu's comments don't appear anymore in the "changes" view afaict. For example I remember him asking for a screenshot of the result. That would be nice to have. I've re-added a comment about this.

Also the path of the md file isn't correct: it must be directly in the blog directly for it to be found by the blog engine (I think).

[doyougnu]

Also the path of the md file isn't correct: it must be directly in the blog directly for it to be found by the blog engine (I think).

I don't think we have a static asset folder defined in docusaurus.config.js, see the docs: https://docusaurus.io/docs/markdown-features/assets#static-assets

and I bet that's why docusaurus looks at blog, it must use the directory of the post as default or last-to-try

[JoshMeredith]

Also the path of the md file isn't correct: it must be directly in the blog directly for it to be found by the blog engine (I think).

I don't think we have a static asset folder defined in docusaurus.config.js, see the docs: https://docusaurus.io/docs/markdown-features/assets#static-assets

and I bet that's why docusaurus looks at blog, it must use the directory of the post as default or last-to-try

Thanks for finding the setting! Hopefully it’s enough that I’ve added that now.

[doyougnu]

just pushed a bunch of fixes. The conclusion needs to be fixed to not repeat (almost verbatim) the introduction. The conclusion should recite the entire post, but inside out (that is, started from the last thing in the post and work its way back to the introduction).

Other than that LGTM!

[JoshMeredith]

Added a conclusion rewording

[hsyl20]

I've added a few changes. LGTM

[luite]

Not sure if the createCallback API has been merged, if it's the case then we might link to it for people who are a bit more adventurous. Now it looks like it's more limited than it actually is.

[hsyl20]

I don't know either. Let's keep this for a future blog post IMHO