Couldn't find any, is there a YouTrack issue for K/JS to get an annotation similar to

@JvmStatic

?

I don't think that there is any

No, unfortunately

@Artem Kobzar thanks! Do you think it would be a valid feature request? Example I've got on hands right now:

public class Properties private constructor(private val data: Map<String, String>) {
  public companion object {
    @JvmStatic
    fun decode(string: String): Properties {
       ...
    }
  }
}

Will output the following

d.ts

:

class Properties {
    private constructor();
    static get Companion(): {
        decode(string: string): Properties;
    };
}

I can see two problems from a JS/TS consumer point of view: 1. What's a "companion"? 2. Why can't I simply

Properties.decode(...)

To workaround the companion issue I'm now using

@JsName("factory")
public companion object Factory {

So it will look good in all platforms, and a JS/TS consumer can use:

Properties.factory().decode(...)

I was thinking about it and I think it's a valid feature request for sure

Well apparently there was an issue, see https://youtrack.jetbrains.com/issue/KT-18891