I am using the kotlin react wrappers and everythin...

# javascript

[Arjan van Wieringen]

I am using the kotlin react wrappers and everything is going great, however I want to create a library, with TS definitions, that defines some hooks. These hooks should return an array with two parameters, say S and T. But, how do I define the types such that I get a proper TS signature?

What I mean is that I need the function to return [S, T] and that my TS consumer code can use array desctructuring. However, I see no way to cleverly do this in Kotlin.

[Andromadus Naruto]

Have you tried using a Pair?

[turansky]

You need JsTuple2<S, T> .
To create it you can use tupleOf factory.

cc @Sergei Grishchenko

[Arjan van Wieringen]

Hmm, the typescript definitions are not correct.

export declare namespace todo {
    function useTodoViewModel(): JsTuple2<todo.TodoState, TodoMutableViewModel>;
}

I'd expect:

export declare namespace todo {
    function useTodoViewModel(): [todo.TodoState, TodoMutableViewModel];
}

It also throws an error for JsTuple2. I don't think it is supported

[Arjan van Wieringen]

@Andromadus Naruto Pair isn't exportable using JsExport

[turansky]

For now you can add JsTuple2 declaration in additional .d.ts file

[Arjan van Wieringen]

Yes that makes sense