Hi! I have a KMP library imported to a LightningJs (<https://lightningjs.io>) project. The library i...

# javascript

[Császár Ákos]

Hi!
I have a KMP library imported to a LightningJs (https://lightningjs.io) project. The library is exported and then imported to the LightningJs project using a private npm registry.
For the following code

@OptIn(DelicateCoroutinesApi::class)
fun testFunctionInline(): Promise<String> =
    GlobalScope.promise(Dispatchers.Default) {
        return@promise "hello with inline"
    }

I get the this error

Uncaught (in promise) TypeError: parentContext.q3 is not a function
at DeferredCoroutine.AbstractCoroutine (as constructor (index-1da9d773.s:124914133)
at new DeferredCoroutine (<http://index-1da9d773.is|index-1da9d773.is>: 125056:27)
at async index-1da9d773 15 124993 86)
at promise (index-1da9d773.5:128534:26)
at protoot2. testFunctionIn line (index-1da9d773.15:135390:14)
at Object. testKmpLib (index-1da9d773.1s:136760:29)
_ConfigService index-1da9d773.15:136742:15
at index-1da9d773.js:136860:23

If I use with a ReactJs project, its working. Any idea what is the problem?

[Artem Kobzar]

Hi, what the compiler version do you use?

[Császár Ákos]

Hi.
1.8.22

[Artem Kobzar]

Could you try please if it will work with 1.9.0 or 1.9.10?

[Császár Ákos]

I tried but it still not working.
I also tried with a new project and it worked. So I'm not sure why its not working with any project but creating a new project is not an option for me.

[Artem Kobzar]

Hmm, I see. Could you also provide a bit more information. What do you mean when you say "exported and imported"? Do you try to use your declarations on the JS side?

[Császár Ákos]

I think its not important, but after build I publish it to a private npm registry (npm publish) and I add the library to the JsProject with npm install .
I also observed that this issue happens only when there are 2 KMP projects imported to the same JS project. Both using GlobalScope.promise(). I am not completely sure how it works, but maybe here is the problem. The stack trace also points to CoroutineScope.async() function which is called when using GlobalScope.promise.

[Császár Ákos]

CoroutineScope(Dispatchers.Unconfined).promise solved the issue.

[Artem Kobzar]

Hmmm. Interesting

[Jan Starczewski]

@Császár Ákos have you managed to resolve the issue? I am facing the same case in my side project 😞

[Császár Ákos]

Yes. Instead of GlobalScope.promise(Dispathers.Default) I am using CoroutineScope(Dispatchers.Unconfined).promise

[Jan Starczewski]

Thank you, I will check and let you know!