Is it possible to do something like this? Specific...

# javascript

[Dominik Csiba]

Is it possible to do something like this? Specifically asking for the options part, as I am currently using dynamic, and I don't like the un-safety.

external interface GraphvizProps : RProps {
  var dot : String
  var options: {width: number, height: number}
 }

[diesieben07]

external interface GraphvizProps : RProps {
  external interface Options {
    var width: Int
    var height: Int
  }
  var dot : String
  var options: Options
 }

[Dominik Csiba]

this gives Non top-level "external" declaration

[diesieben07]

Ah, you don't need the "external" on nested declarations

[Dominik Csiba]

Thanks, that worked out! However, now I am struggling to implement an object, which satisfies this interface. What do I put in the options part?

Graphviz {
                attrs.dot = "blabla"
                attrs.options = ???
            }

[diesieben07]

Unfortunately there is no easy syntax in Kotlin to implement an external interface via a plain JS object. You either have to write a class that implements it or you use a helper function with the js function.

[Dominik Csiba]

From my limited understanding it seems to me, that it should be possible to use an object implementing the interface, but I am unable to figure out the correct syntax

[diesieben07]

That would be

object : MyInterface {
  override var foo = 3
}

However that creates a "class" (implemented in JS as a function) with a prototype and everything instead of just a plain object.

[Dominik Csiba]

I see. At least it corrects me if I misspell width. Thanks for the insights!