```val compileKotlin2Js by getting(org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile::class) compil...

# javascript

[bjonnh]

val compileKotlin2Js by getting(org.jetbrains.kotlin.gradle.tasks.Kotlin2JsCompile::class)
compileKotlin2Js.apply { kotlinOptions.moduleKind = "commonjs" }

[bjonnh]

Also tried:

[bjonnh]

plugins {
    kotlin("multiplatform") version "1.3.61"
    id("kotlinx-serialization") version "1.3.61"
    id("kotlin2js") version "1.3.61"
}

[bjonnh]

but I get An exception occurred applying plugin request [id: 'kotlin2js', version: '1.3.61', artifact: 'org.jetbrains.kotlinkotlin gradle plugin1.3.61']

Failed to apply plugin [id 'kotlin2js']

> Cannot add extension with name 'kotlin', as there is an extension already registered with that name.

[bjonnh]

Hmm so Kotlin2js is deprecated and there are undocumented options with the new system.

[bjonnh]

finally got it to work