144 object extras extends Module {

   145 

   146   class JvmModule(val crossScalaVersion: String) extends Common

   147   class JsModule(val crossScalaVersion: String, crossJSVersion: String)

   148     extends ScalaJSModule with Common {

   149 

   150     override def scalaJSVersion: Target[String] = crossJSVersion

   151 

   152     override def millSourcePath = super.millSourcePath / os.up

   153   }

   154 

   155   object jvm extends Cross[JvmModule](V.scala211, V.scala212, V.scala213)

   156   object js extends Cross[JsModule](

   157     V.scala211 -> V.scalaJs06,

   158     V.scala212 -> V.scalaJs06,

   159     V.scala212 -> V.scalaJs,

   160     V.scala213 -> V.scalaJs06,

   161     V.scala213 -> V.scalaJs

   162   )

   163 

   164 }