When using suspending functions as class functions, how do you expose them to JS as promises? Is cre...

# javascript

[Edoardo Luppi]

When using suspending functions as class functions, how do you expose them to JS as promises?
Is creating wrappers the only way?

[andylamax]

yes wrapping is the only way

[Edoardo Luppi]

@andylamax ouch, that's so redundant.
I can't even reuse base interfaces as their methods are declared as suspendable

[andylamax]

to combat that, make your base interfaces with callbacks, then add await as extension functions to your base interfaces. That way your code is easily usable all over

[Edoardo Luppi]

@andylamax uh, callbacks by default seems a good idea, but I don't understand the extension functions part

[andylamax]

Let me give you an exaple

interface ThingGetter {
  fun getThing(callback: (Thing)->Unit)
}

suspend fun ThingGetter.await() = suspendCancelableCoroutine {cont->
  getThing{thing->
     cont.resume(thing)
  }
}

[Edoardo Luppi]

Thanks! I'll think about this!