Hi, i've got som problem with coroutines (1.8.0-RC...

# compose-web

[Michał Konkel]

Hi, i've got som problem with coroutines (1.8.0-RC2)

I am running compose application on Android, iOS and WASM.
Provided code acts differently on WASM than expected.

App() {
   LaunchedEffect(Unit) {
      fetchUsers()
   }
}

fetchUsers() is a suspend function that feteches users fro the backend.
On Android and iOS the function is invoked and users are listed in the console.
On WASM there is infinite loop that after every fetchUsers() invocation reloades the whole page

[Oleksandr Karpovich [JB]]

Do you have the same issue with coroutines 1.8.0-RC?

[Michał Konkel]

I will check with 1.8.0-RC

[Michał Konkel]

give me a 2min

[Michał Konkel]

same situation with 1.8.0-rc

[Michał Konkel]

imho its not corutines its something with compose

[Michał Konkel]

fetchUsers is provided via presentation presentation is provided via simple service locator

objec DI {
   val presentationFactory by lazy {
      RealPresentationFactory()
   }
}

so the whole code looks like that:

App() {
   val presentation = remember { DI.presentationFactory.createAppPresentation() }   

   LaunchedEffect(Unit) {
      presentation.getUsers()
   }
}

[Oleksandr Karpovich [JB]]

Let's try to eliminate it's not coroutines related

could you please check:

fun main() {
    MainScope().launch {
        fetchUsers()
        println("Done")
    }
}

_

[Michał Konkel]

I've did:

LaunchedEffect(Unit) {
  test()
}

private suspend fun test() {
   (1..10).forEach {
      deleay(5000)
      printLn(it)
   }
}

and it's working ok

[Oleksandr Karpovich [JB]]

good. There is something specific in fetchUsers() then

[Michał Konkel]

same with the MainScope() - infinite loop

[Michał Konkel]

i will go deeper into the function

[Oleksandr Karpovich [JB]]

okay. Then it's probably coroutines related issue

[Michał Konkel]

it's problem with KTOR client

[Michał Konkel]

LaunchedEffect() {
   presentaton.fetchUsers()
}

...

suspend fun fetchUsers() {
  delay(5000)
  return listOf(User, User)
}

Works OK

LaunchedEffect() {
   <http://client.post|client.post>("/login") ...
}

...

client = HttpClient { ... }

Loop

[Michał Konkel]

if u interested i've created an issue about this case
https://youtrack.jetbrains.com/issue/KTOR-6616