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:wave: I'm trying to decide when it's preferable to use an `external interface` vs a regular `interface` - does anyone have any thoughts on this?

`external interface` is for "external" plain JS code only, eg a 3rd plain JS library, you want to use in Kotlin/JS.

gotcha, but if I wanted to share an interface with my non-js code and a react component, I could safely use a regular interface for that?

Which way? If you want to use the Kotlin/JS component in plain JS, you need `@JSExport`. Otherwise you can use `external interface` (or even better use typescript) and consume it in Kotlin/JS.

Hmmm I want my interfaces in -common to be used as part of the props on a react component in -js, e.g.:

common:
```interface Dog { 
  abstract val name: String
}```
js:
```interface RenderDogsListProps : RProps {
    val dogs: Set&lt;Dog&gt;
}```

So I think what I'm understanding here is I'll need to mark `Dog` with `@JSExport`?