Hey <@U0BMF6PDJ>, congrats on the 1.4-m1 release. ...

# javascript

[Ian Stewart]

Hey @bashor, congrats on the 1.4-m1 release. I'm very excited to see this, in particular the typescript output. I've been using ntrrgc's tool for ts, it will be great to have full classes generated!
I'm not sure if I am set up correctly, though. I'm trying to do a multiplatform project, and the release docs say to annotate your classes with @JsExport. When I use this in my common code all of my other targets fail, (jvm, ios, ...) Even when using multiplatform with just js, it fails with the same error for the compileKotlinMetadata task. Am I missing an incantation?

[Ian Stewart]

gradle.properties:

kotlin.js.compiler=ir

build.gradle.kts:

plugins {
  java
  kotlin("multiplatform") version "1.4-M1"
}
repositories {
   mavenCentral()
   maven("<https://dl.bintray.com/kotlin/kotlin-eap>")
   maven("<https://kotlin.bintray.com/kotlinx>")
}
val coroutinesVersion = "1.3.5-1.4-M1"
...
kotlin {
  js {
  }
  sourceSets {
    val commonMain by getting {
      dependencies {
        api("org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$coroutinesVersion")
      }
    }
    js().compilations["main"].defaultSourceSet {
      dependencies {
        api("org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$coroutinesVersion")
      }
    }
  }
}

[Ian Stewart]

@ExperimentalJsExport
class MyClass() {
}

[turansky]

Do you forget stdlib dependencies?

[Ian Stewart]

Thanks for reaching out Victor. I haven't required this before, but I tried adding everything I could, no effect.
I've tried added everything I could globally:

dependencies {
    implementation(kotlin("stdlib"))
    implementation(kotlin("stdlib-common"))
    implementation(kotlin("stdlib-js"))
}

and to the js:

js().compilations["main"].defaultSourceSet {
      dependencies {
        implementation(kotlin("stdlib"))
        implementation(kotlin("stdlib-common"))
        implementation(kotlin("stdlib-js"))
        api("org.jetbrains.kotlinx:kotlinx-coroutines-core-js:$coroutinesVersion")
      }
    }

Note the Js portion works, it is the compileKotlinMetadata task that fails. Is there somewhere else I should put the dependency? My guess is that it isn't precisely the js that is failing.

[turansky]

JS target required

[turansky]

browser() or nodejs()

[Ian Stewart]

same result with js(), js {browser()}, js {nodejs()}...

[turansky]

I declare dependencies in this maner

[bashor]

You use wrong annotation, try JsExport

[Ian Stewart]

It fails for that as well. I think the issue is that this code is in the commonMain folder, and not the jsMain folder.

[Ian Stewart]

here's a minimal example https://github.com/heystewart/kotlin

[bashor]

ExperimentalJsExport needed to disable warning

[bashor]

The annotation is not yet available in common part

[bashor]

You can track this issue https://youtrack.jetbrains.com/issue/KT-35966

[bashor]

Please try in js part of multiplatform project or in pure Kotlin/JS project and let us know if it still doesn’t work for you. Thank you!

[Ian Stewart]

Yes, it does work in jsMain, but that's very limiting for a multi-platform project.

[Ian Stewart]

I did manage to get a .d.ts generated, and tried creating a myClass2 that extends the commonMain myClass, and noticed that it also does not recurse into the classes defined in commonMain project. I'm not sure if this aspect is logged; the generated .d.ts will therefore not have enough information to give completion in this case either.

[Ian Stewart]

I was able to use the workaround suggested in the above bug, however. With the added @CommonJsExport in commonMain, I get generated .d.ts, so thank you for that link! I can continue with this hack solution 😉
Thanks Victor, Zalim

[bashor]

Please file an issue about it (cc @Svyatoslav Kuzmich [JB]) https://kotlinlang.slack.com/archives/C0B8L3U69/p1585087758380300?thread_ts=1585077900.375300&amp;cid=C0B8L3U69

[Ian Stewart]

Logged https://youtrack.jetbrains.com/issue/KT-37771

[bashor]

Thanks!