Is it possible to use `@JsName` on properties decl...

# javascript

[MrPowerGamerBR]

Is it possible to use @JsName on properties declared on a @JsPlainObject? I wanted to change some snake_case variables into camelCase, to make it look "better" in Kotlin

I tried searching for it, but the only result of someone trying to do this was this conversation: https://kotlinlang.slack.com/archives/C0B8L3U69/p1728428182216839

However after testing it, it doesn't seem to work on Kotlin 2.2.0 😞

[turansky]

It looks like bug, JsName should be respected

[turansky]

Could you please report an issue?

[MrPowerGamerBR]

Sure! I will just make sure that I can reproduce the bug on Kotlin 2.2.20 first

[MrPowerGamerBR]

But "technically" the bug has already been reported before by Chris https://youtrack.jetbrains.com/issue/KT-72474/JsPlainObject-doesnt-honour-XXLanguageJsAllowInvalidCharsIdentifiersEscaping

While the issue title talks about -XXLanguage:+JsAllowInvalidCharsIdentifiersEscaping, it seems that the real issue is just that @JsPlainObject does not respect @JsName

However the issue was closed due to inactivity because it seems a repro project was never submitted @turansky

[MrPowerGamerBR]

Here's a repository with the reproduction steps kodee loving: https://github.com/MrPowerGamerBR/JsPlainObjectJsNameBug

I've decided to reply to the KT-72474 issue instead of creating a new issue because, technically, the KT-72474 issue is the same issue that I'm having, with the caveat that the original author thought that this issue only happened when using -XXLanguage:+JsAllowInvalidCharsIdentifiersEscaping when, in reality, it happens no matter if you use it or not.

However if creating a new issue would be a better idea, please let me know. :)

[turansky]

Issue reopened! 😉

[MrPowerGamerBR]

So, I've decided to debug a bit deep to try to figure out what it is, and I think the issue is that the JsName annotation is never checked here:

https://github.com/JetBrains/kotlin/blob/f7172786efae0b76fb30c22e718f77b26bea7d17/[…]rains/kotlinx/jso/compiler/backend/JsObjectLoweringExtension.kt

However, when experimenting, it seems that I can't access any of the property annotations in the loop (all IrValueParameter have a empty list for the annotations field)

And because I have never created a K2 plugin before, I'm way out of my depth for this, but I hope that this can be fixed soon :)

[turansky]

Yes, information about JS name should be copied somehow to function parameter 😉

[MrPowerGamerBR]

The issue has been fixed, yay! kodee loving https://github.com/JetBrains/kotlin/commit/e36d5c8e7b59e2041984a5692aad9eb2e7aa71fc