Hi, can you please point me to an example or documentation on how to use javascript modules in Kotli...

# javascript

[Márton Matusek]

Hi,
can you please point me to an example or documentation on how to use javascript modules in Kotlin js code? I only found this document but there are no actual examples on where/how to implement the extenal functions/classes/interfaces defined in Kotlin code. The use case is that I would like to develop a KMP SDK/library and publish it as an npm package as well.
Thanks!

[Artem Kobzar]

Hey. Could you please help me to understand your use-case? Do you want to consume JS module from Kotlin, or consume Kotlin/JS code in JS?

[Artem Kobzar]

For the first one (to consume NPM-package in Kotlin, as an example), you need to check this document
For the other case (consumption of Kotlin code from JS) - this document.
Also, I have a small example of KMP application with the use-case of sharing code in between of platforms: https://github.com/JSMonk/make-friends-with-kotlin-devs/tree/step-3-share-api-requests

[Márton Matusek]

Hi, I would like to implement part of the kotlin/js code in js. Because eg. some APIs are not available yet in Kotlin

[Márton Matusek]

as a concrete example:
if I have a declaration like this:

@JsModule("hello")
external fun sayHello(name: String)

where should I implement sayHello in js?

[Robert Jaros]

https://dev.to/mpetuska/js-in-kotlinjs-c4g

[Márton Matusek]

Thanks @Robert Jaros, unfortunately, there is no example on using a local JS module in Kotlin in that article

[Edoardo Luppi]

I think what you're looking for is to have a small subset of code developed in JS locally, inside the same Gradle module.

In that case you can place your .js files under the resources directory, e.g., resources/hello.js

[Márton Matusek]

Exactly @Edoardo Luppi. And then how do I bind them in the JsModule annotation?

[Edoardo Luppi]

If you're using default export in JS, you can use

@file:JsModule("./hello")

[Edoardo Luppi]

And on the function

@JsName("default")
public external fun sayHello()

[Edoardo Luppi]

I suppose it should work.

[Márton Matusek]

Thank you, this worked, even without the default export. The only caveat was that I had to use ESM syntax