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kotlinlang

is there a way to replace webpack with something faster like esbuild? I'm not looking for a fully featured solution like Vite which has additional requirements like an index.html, I'm purely looking for a faster bundler

You can run esbuild manually on the generated JavaScript file.

Or, if you want to run esbuild as part of your Gradle build, you can create a Gradle task that would run esbuild on the output of the Kotlin/JS compilation task.

right, looking at build/js it seems that the kotlin compile task writes it's output into that folder

I'm unsure however if esbuild works on that file structure

Vite is <https://github.com/turansky/kfc-plugins#bundler|here>!

I suppose you absolutely need an index.html file

I've just got a main file, nothing that really needs HTML

nvm, there's a config option for an entrypoint <https://vite.dev/guide/backend-integration.html>

> I suppose you absolutely need an index.html file
Default configuration entry point - JS file :wink:

If you will need something more - you can copy and modify default KFC config

do you have an example config lying around?

or is it just: enable the plugin, place a vite.config.mjs and you're done?

It will work even without `vite.config.mjs` :wink:

They work fine on Webpack + Karma :trollface:

<https://blog.jetbrains.com/kotlin/2025/05/present-and-future-kotlin-for-web/> :kodee-happy:

<@U33H6SB2B> I am trying to test your plugin, vite starts but I get an error 404
Could you have a look at my gradle files? My files (copied from examples/vite-dev) are placed in js/src/main
my build.gradle.kts
```// build.gradle.kts
plugins {
    id("org.jetbrains.kotlin.multiplatform") version "2.1.20" // Oder eine neuere Version
    id("io.github.turansky.kfc.application") version "13.15.0" // Oder eine neuere Version
    id("org.jetbrains.kotlin.plugin.js-plain-objects") version "2.2.0-RC3"
}

version = "1.0-SNAPSHOT"

kotlin {
    js(IR) {
        browser()
        binaries.executable()
    }

    sourceSets {
        val jsMain by getting {
            dependencies {
                implementation(kotlinWrappers.browser)
            }
        }
    }
}```
settings.gradle
```// settings.gradle.kts
pluginManagement {
    repositories {
        gradlePluginPortal()
        mavenCentral()
    }
}
dependencyResolutionManagement {
    repositories {
        mavenCentral()
    }

    versionCatalogs {
        create("kotlinWrappers") {
            val wrappersVersion = "2025.6.5"
            from("org.jetbrains.kotlin-wrappers:kotlin-wrappers-catalog:$wrappersVersion")
        }
    }
}

rootProject.name = "test-vite"

include("js")```

Source folder in subproject should be default - `src/jsMain/kotlin`

Nope, I’ll try to add a test-project on github