japgolly/scalajs-react

Hi @japgolly, I'm currently using scalablytyped definitions with react-window. Their constructor for the FixedSizeList component was translated as following:

object FixedSizeList {
 // ...
 def apply(
    children: ComponentType[ListChildComponentProps],
    height: Double | String,
    itemCount: Double,
    itemSize: Double,
    width: Double | String
  ) { ...}
  // ...
}

where ComponentType is:

  type ComponentType[P] = (japgolly.scalajs.react.raw.React.ComponentClassP[P with js.Object]) | typings.react.mod.FunctionComponent[P]

I've been trying to pass in a simple component and no matter what I try I can't get it to compile.
The closest I've got was this:

val comp = ScalaComponent.builder[ListChildComponentProps]("a").render_P { x => <.div("foo") }

Window.FixedSizeList(height = 800, width = 800, itemSize = 200, itemCount = 42,
                    children = ViaReactComponent(comp))

But then it returns boxed props and states so a mismatch again.
Any pointers on how I could get this to work?