Is there a way to use an elm module in javascript?

Question

So I've written a few super simple apps in elm. But they're completely in elm. What I'm wondering is if I can make modules in elm and use them in my javascript projects. I often make and maintain opensource projects which I use in projects for my clients. This helps speed up my work, and also gives me feedback from the community on how to improve these projects. It's a great mutual benefit. I have a project that I believe could really benefit from using elm, but I would need to use it as a module in my production projects as I cannot simply port these applications to elm nor can I convince most of my clients that elm is popular enough to make it a good decision to use for their project.

So I'm really curious to know if elm can be used to create modules which can be used in javascript, much to the same effect as how you can make typescript modules which you can use in your vanilla JS.

I assume this is what you are looking for: guide.elm-lang.org/interop/javascript.html — peinearydevelopment
– peinearydevelopment, Commented Apr 14, 2017 at 3:10

Tosh · Accepted Answer · 2017-04-14 10:35:39Z

4

Do you mean to use function implemented by Elm from javascript?

Then, here is what I did with my project.

You can code your Elm project using Platform.program.

main : Program Never Model Msg
main =
  Platform.program
    { init = init
    , update = update
    , subscriptions = subscriptions
    }

then you can load compiled code and interact with the compiled module via port from your javascript project.

// load main Elm script
const app = require('./elm').Main.worker()
app.ports.test.subscribe(.......

answered Apr 14, 2017 at 10:35

Tosh

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1 Comment

tsturzl Over a year ago

Very interesting, so it's as though you communicate with the module via a channel.

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