In JS I had: ```//} catch (e: dynamic) { // @TODO: Check wasm } catch (e: Throwable) { ``` all the ...

# webassembly

[Carlos Ballesteros Velasco]

In JS I had:

//} catch (e: dynamic) { // @TODO: Check wasm
} catch (e: Throwable) {

all the exceptions I could get even if they are from JS are converted into Throwable?

[Carlos Ballesteros Velasco]

Couldn't find a way to catch JS errors with: catch (e: Error) { or catch (e: dynamic) { . So I solved it like this:

@JsName("Error")
external class JsError : JsAny {
    val message: String?
}

external interface JsResult<T : JsAny> : JsAny {
    val result: T?
    val error: JsError?
}

@JsFun("(block) => { try { return { result: block(), error: null }; } catch (e) { return { result: null, error: e }; } }")
private external fun <T : JsAny> runCatchingJsExceptions(block: () -> T): JsResult<T>

fun <T : JsAny> wrapWasmJsExceptions(block: () -> T): T {
    val result = runCatchingJsExceptions { block() }
    if (result.error != null) throw Exception(result.error!!.message)
    return result.result!!
}

[Igor Yakovlev]

Hi, yes, JS exceptions for now can not be catched in Kotlin generated Wasm code right now. So the best solution, I believe, is yours.