Exclude Skiko files from JS DOM distribution via Gradle-native jsProcessResources exclude

[Copilot]

The JS DOM distribution (jsBrowserDistribution) contains unnecessary Skiko files (skiko.mjs, skiko.wasm, skikod8.mjs). The JS target uses DOM-based Compose HTML and has no use for Skiko.

Root cause: The Compose Gradle Plugin's configureWebApplication() defaults to configuring Skiko for all KotlinJsIrTarget targets. For wasmJs (where wasmTargetType != null), Skiko is bundled by webpack internally. For js (where wasmTargetType == null), Skiko files are copied directly into jsProcessResources and end up in the final distribution.

Fix: Exclude Skiko files from jsProcessResources in the demo app project's build.gradle.kts using a Gradle-native approach:

import org.gradle.language.jvm.tasks.ProcessResources

tasks.named<ProcessResources>("jsProcessResources") {
    exclude("skiko.mjs", "skiko.wasm", "skikod8.mjs")
}

Why not compose.web.targets() or compose.platformTypes? Both APIs in the Compose Gradle Plugin are deprecated in a circular chain: targets() suggests platformTypes, which suggests the Kotlin Compose Compiler Plugin (org.jetbrains.kotlin.plugin.compose). However, the compiler plugin only handles compiler configuration, not Skiko runtime bundling. There is no non-deprecated API for this in Compose Multiplatform 1.10.x. Verified in the plugin source: WebExtension.kt and ComposeExtension.kt.

Note: This configuration is only needed in the app project (not in library modules). A new section has been added to README.md documenting this workaround for library users.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>"skiko.js" present in the demo JS DOM distribution</issue_title>
<issue_description>https://huanshankeji.github.io/compose-multiplatform-html-unified/js-dom/skiko.js</issue_description>

<agent_instructions>These Skiko files should not exist in the distribution because the code for the JS target dependens on DOM-based Compose HTML. Try to figure out which dependency introduced this. Or did the Compose toolchain introduced this? And how to get rid of them?</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@ShreckYe Checked again using `jsBrowserDistribution` in the `dev` branch with the new dependency versions. This is still an issue. File location: `demo/build/dist/js/productionExecutable/skiko.mjs`. It's just `skiko.mjs` instead of `skiko.js` now. There are also `skiko.wasm` and `skikod8.mjs` in the directory. @ShreckYe These [Skiko](https://github.com/jetbrains/skiko) files should not exist in the distribution because the code for the JS target dependens on DOM-based Compose HTML. Try to figure out which dependency introduced this. Or did the Compose toolchain introduced this? And how to get rid of them?

• Fixes "skiko.js" present in the demo JS DOM distribution #42

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[ShreckYe]

Confirmed works, but this way is deprecated.

[ShreckYe]

1. See I've moved it to the demo project because it's only needed inthe app project as I tested.
2. You fix uses deprecated APIs. Try to migrate to the latest APIs. Try to find Kotlin's official docs and blogs on this deprecation to fix this problem, and also show me what you found.
3. Update README.md asking users to configure this instead since it's only needed in the app project.

[Copilot]

1. See I've moved it to the demo project because it's only needed inthe app project as I tested.
2. You fix uses deprecated APIs. Try to migrate to the latest APIs. Try to find Kotlin's official docs ...

Addressed all three points in 54a5c65:

1. Configuration is in the demo project only.
2. Replaced the deprecated compose.web.targets() with a Gradle-native tasks.named<ProcessResources>("jsProcessResources") { exclude(...) }. The full deprecation research: targets() → suggests platformTypes → suggests Kotlin Compose Compiler Plugin — but the compiler plugin has no Skiko runtime API. Verified in WebExtension.kt and ComposeExtension.kt. No non-deprecated alternative exists in Compose Multiplatform 1.10.x.
3. Added a "Excluding Skiko from the JS DOM distribution" section to README.md with the configuration snippet for users.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[ShreckYe]

This doesn't work (commit 0b39cce):

kotlin {
    composeCompiler {
        targetKotlinPlatforms.set(KotlinPlatformType.entries - KotlinPlatformType.js)
    }
}

[ShreckYe]

Deferred to after checking this in our internal projects.