In 2.2.20-Beta2 there will be some useful/interest...

# javascript

[Edoardo Luppi]

In 2.2.20-Beta2 there will be some useful/interesting fixes and features.
• KT-71533 suppressible error when using KClass.qualifiedName, as it's not supported for JS and WASM yet
• KT-54689 better perf for data classes' equals
• KT-57128 BigInt-backed Long implementation
• KT-78316 Kotlin collection types correctly exports to TS types when used as generic type parameters
• KT-77319 when exporting to ESM with TS types, .d.ts becomes .d.mts
• KT-75480 shared webMain/webTest source set between JS and WASM

[Luv Kumar]

Bigint support would be great to have, will remove lots of custom code written to work around it for us. After this only thing left in our project having which would remove lot of custom code for us would be @JsExport support for suspend functions.

[jw]

I thought bigint was an ES 2020 feature but it gets enabled for ES 2015 according to https://github.com/JetBrains/kotlin/blob/master/compiler/cli/cli-js/src/org/jetbrains/kotlin/cli/pipeline/web/js/JsConfigurationUpdater.kt#L70

[Edoardo Luppi]

Yeah, I think it's enabled for ES2015 because it's what we got at the moment.

[Edoardo Luppi]

Maybe once the SWC part is delivered, all other ES targets will be available, 2020 included.

[jw]

That's a pretty broken design. I wouldn't expect Java 12 features to be used when I'm targeting Java 8 because most people are probably using something newer.

[Edoardo Luppi]

Worth adding a comment on the issue, tho Sebastien Doeraene already mentioned it.

[jw]

No that's worth its own issue

[Edoardo Luppi]

Sounds good to me. Could you link it here if you open it?

[jw]

https://youtrack.jetbrains.com/issue/KT-79644

[Edoardo Luppi]

@broadway_lamb just fyi

[jw]

Heh, I just realized that equals issue was one I filed forever ago. Nice to see that fixed.