[PlatformSourceSetConventionUsedWithCustomTargetName | WARNING] Accessed 'source set jsMain', but js target used a custom name 'custom' (expected 'js'):

Replace:
    kotlin {
        js("custom") /* <- custom name used */
    }

With:
   kotlin {
       js()
   }
----
[PlatformSourceSetConventionUsedWithCustomTargetName | WARNING] Accessed 'source set jsTest', but js target used a custom name 'custom' (expected 'js'):

Replace:
    kotlin {
        js("custom") /* <- custom name used */
    }

With:
   kotlin {
       js()
   }
----
[UnusedSourceSetsWarning | WARNING] The following Kotlin source sets were configured but not added to any Kotlin compilation:
 * jsMain
 * jsTest
You can add a source set to a target's compilation by connecting it with the compilation's default source set using 'dependsOn'.
See https://kotl.in/connecting-source-sets