A modern programming language that makes developers happier.

kotlinlang

2.1.20-Beta2 has a couple of perf enhancements for JS, plus a lot of QOL fixes.
2.1.20 release might end up having many more :eyes:

<https://youtrack.jetbrains.com/issue/KT-71199|KT-71199> K/JS: charSequenceGet intrinsic should bypass Char range checks
<https://youtrack.jetbrains.com/issue/KT-73759|KT-73759> KJS: do not fillArrayVal if using an Array init function
<https://youtrack.jetbrains.com/issue/KT-73130|KT-73130> KJS: Missed break for do/while in generated JS code
<https://youtrack.jetbrains.com/issue/KT-68067|KT-68067> KJS: Overriding methods with default parameters doesn't work
<https://youtrack.jetbrains.com/issue/KT-71656|KT-71656> K2 JS: "IllegalStateException: Class has no primary constructor: kotlin.ULong"
<https://youtrack.jetbrains.com/issue/KT-70987|KT-70987> KJS: @JsExport: NullPointerException with private data class
<https://youtrack.jetbrains.com/issue/KT-72974|KT-72974> KJS / ESModules: EagerInitialization annotation has no effect on unused properties
<https://youtrack.jetbrains.com/issue/KT-71788|KT-71788> KJS: NPE when use @JsExport with @JsPlainObject
<https://youtrack.jetbrains.com/issue/KT-72598|KT-72598> KJS: Nested @JsPlainObject does not work
<https://youtrack.jetbrains.com/issue/KT-70078|KT-70078> @JsPlainObject compiles broken code when inlining suspend function
<https://youtrack.jetbrains.com/issue/KT-68904|KT-68904> @JsPlainObject breaks when inside a file with @file:JsQualifier
<https://youtrack.jetbrains.com/issue/KT-74067|KT-74067> KJS: ES class constructor is generated with 'return this'
<https://youtrack.jetbrains.com/issue/KT-72883|KT-72883> [JS] AbstractSuspendFunctionsLowering crashes on private top level suspend fun