Hello. I bumped into issue: serialization works well in JVM, but fails in JS with exception (`1.2.0`...

# serialization

[Mikhail Buzuverov]

Hello. I bumped into issue: serialization works well in JVM, but fails in JS with exception (1.2.0 library version):

TypeError: tmp$.serializer is not a function
	at <global>.compiledSerializerImpl(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:72080)
	at <global>.serializerOrNull(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:67234)
	at <global>.reflectiveOrContextual(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:67226)
	at <global>.builtinSerializer(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:67220)
	at <global>.serializerByKTypeImpl(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:67159)
	at <global>.serializer(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:67129)
	at data.OperationResultSerializationTest.operationSuccessSerializationTest(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:77540)
	at <global>.<unknown>(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:77588)
	at Context.<anonymous>(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_490920/commons.js:57)

Or (with 1.1.0 library version):

SerializationException: Serializer for class 'OperationResult' is not found.
Mark the class as @Serializable or provide the serializer explicitly.
On Kotlin/JS explicitly declared serializer should be used for interfaces and enums without @Serializable annotation
	at Object.captureStack(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:40068)
	at SerializationException.constructor(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:40401)
	at SerializationException.constructor(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:40427)
	at SerializationException.constructor(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:40447)
	at IllegalArgumentException.init(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:40458)
	at SerializationException.init(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:67048)
	at <global>.platformSpecificSerializerNotRegistered(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:72030)
	at <global>.serializer(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:67125)
	at data.OperationResultSerializationTest.operationSuccessSerializationTest(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:77226)
	at <global>.<unknown>(C:/Users/Akela/AppData/Local/Temp/_karma_webpack_73575/commons.js:77274)

I described the issue: https://github.com/Kotlin/kotlinx.serialization/issues/1448

Could you help me? Is there a workaround?

[turansky]

Use IR, which works?

[Mikhail Buzuverov]

Yes, I checked and IR works. But is it production-ready? I need React on front-end

[turansky]

Looks like it has less bugs than legacy in 1.5.0
Current stopper for me - compilation speed in development builds, but I have big project.

Related thread - https://kotlinlang.slack.com/archives/C0B8L3U69/p1619631675064900

[turansky]

My recommendation - use IR (since Kotlin 1.5.0), if build speed is’t critical problem in your case

[Tiago Nunes]

Wasn't IR supposed to (also) introduce faster compilation times?

[turansky]

It will! More likes and comments required 🙂
https://youtrack.jetbrains.com/issue/KT-46485