KMP JS build failure: No matching JS variant for compose-stability-runtime:0.5.3

[pushpalroy]

Project information:

• Library Version: 0.5.3
• Affected Target(s): Kotlin Multiplatform project with JS target (IR + npm / browser) running in GitHub Actions CI on ubuntu-latest

Describe the Bug:

Using the stability analyzer plugin inside a Kotlin Multiplatform shared module that targets Android, iOS, Desktop, and JS causes the build to fail during the :kotlinNpmInstall step. The JS resolution fails because Gradle cannot locate a matching variant of the dependency com.github.skydoves:compose-stability-runtime:0.5.3.

Could not determine the dependencies of task ':kotlinNpmInstall'.
> Failed to query the value of task ':kotlinNpmInstall' property 'packageJsonFiles'.
   > Could not resolve all dependencies for configuration ':jetlime:jsNpmAggregated'.
      > Could not resolve com.github.skydoves:compose-stability-runtime:0.5.3.
        Required by:
            project :jetlime
         > No matching variant of com.github.skydoves:compose-stability-runtime:0.5.3 was found. 
           The consumer was configured to find a library for use during 'kotlin-runtime',
           optimized for non-jvm, with attributes for JS IR + public package.json (npm),
           but no compatible variant exists.

This issue occurs specifically when building in GitHub Actions CI, and prevents building KMP libraries with JavaScript targets.

Expected Behavior:

The plugin should either:

• Provide a JS-compatible artifact (or wasm-js compatible if intended), or
• Automatically skip / allow disabling on unsupported targets (e.g., js {} target in KMP)

so that the build completes successfully without failing the kotlinNpmInstall.
Until a JS variant is available, KMP consumers should be able to opt out per target without breaking CI builds.

[skydoves]

Hi @pushpalroy, for now, this library doesn't support Js, KMP. Let me take a look at this for the next release.

[skydoves]

Hi @pushpalroy, a new version 0.6.0 has been released, and now it should support Js as expected.

[pushpalroy]

@skydoves Thanks a lot, will try this out!

[rishabhsingh2002]

@pushpalroy can you please let me know, as planning to integrate in KMP ?

[pushpalroy]

I tested v0.6.0 in my KMP project by integrating the Gradle plugin and using the @TraceRecomposition annotation. Here are my findings:

• All targets are building successfully (Android, iOS, Desktop, JS, and WASM). The previous kotlinNpmInstall failure is no longer occurring.
• @TraceRecomposition works as expected on Android and Desktop, but I wasn’t able to see any logs for JS or WASM builds.
• The stabilityDumpGradle task is currently failing locally at compileDevelopmentLibraryKotlinWasmJs due to an OutOfMemory error.

[rishabhsingh2002]

Thanks

[skydoves]

Hi @pushpalroy, thank you so much for your detailed debugging.

I'm wondering if you have tried to increase your Gradle task's heap size like below:

Add to your gradle.properties:

  # Increase heap size for Kotlin/Wasm compilation
  org.gradle.jvmargs=-Xmx4g -XX:MaxMetaspaceSize=1g

Also, for JS/WASM, the logs should appear in the browser console, not in Android Studio's logcat.

For JS/WASM builds:

1. Run your app in the browser
2. Open Browser Developer Tools (F12 or Right-click → Inspect)
3. Go to the Console tab
4. Look for logs starting with [Recomposition #N]

Please let me know if the above solutions still do not work for you.

[pushpalroy]

Hi @skydoves, thanks for guiding on this!

1: Increasing the heap size for Kotlin/Wasm compilation fixed the OOM issue, and I'm able to run stabilityDumpGradle and generate the baseline now. 👍🏻 Also working great with the CI.

2: Yes, I'm checking the logs on the browser console, but still unable to get the logs for the JS/WASM. To debug further, I have added a manual log like this in my Composable:

@ExperimentalAnimationApi
@TraceRecomposition
@Composable
fun BasicVerticalTimeLine(modifier: Modifier = Modifier, showSnackbar: (message: String) -> Unit) {
  println("DebugComposable recomposed (manual println)") << added manual log
  val items = remember { getCharacters().subList(0, 4) }
  ...
}

which is showing up in my console, but not the [Recomposition #N] ones:

Not sure if I'm missing something. 🤔