Unless I am mistaken, <KT-22635> looks like fixed with Kotlin/JS but not Kotlin/Wasm. Is it expected...

# webassembly

[sdeleuze]

Unless I am mistaken, KT-22635 looks like fixed with Kotlin/JS but not Kotlin/Wasm. Is it expected?

This is fine with Kotlin/JS (thanks for fixing that BTW):

fun main() {
	window.onload = { document.body?.sayHello() }
}

With Kotlin/Wasm, I need to write:

fun main() {
    window.onload = {
        document.body?.sayHello()
        null
    }
}

To make it compile.

[Svyatoslav Kuzmich [JB]]

We don’t plan to support dynamic in K/Wasm. These lambda types are generated from EventHandler IDL and it seems that return value can be used to cancel the event. I agree that most of the time we don’t need to return anything and having to put null is inconvenient. We’ll see what can be done.

[sdeleuze]

Make sense to not support dynamic with Wasm but I am a bit confused by the fact asDynamic() can be invoked. Is it just returning this or is it a noop operation currently?

Maybe you did this temporarily for better compat with Kotlin/JS?

Would that make sense to ensure it is not used at compile time to avoid any confusion like the one I had when porting kotlinx-html (silent failure)?

[Svyatoslav Kuzmich [JB]]

asDynamic() wasm a temporarily stub to make our code ported from Kotlin/JS compile and run in some cases. It usually works as as , but it is overloaded for String where it converts Kotlin String to JS.

We should probably drop it from stdlib, please don’t use it.

[Svyatoslav Kuzmich [JB]]

Sorry for causing the confusion, we should’ve handled it better :)

[sdeleuze]

Ok I will remove any usage of it.

[sdeleuze]

Np I am working on this early I know the risks 😉