fixing common as crossCompiled

build.sbt

@@ -23,7 +23,7 @@ lazy val frontend = project
     scalaJSLinkerConfig ~= {
       _.withModuleKind(ModuleKind.ESModule)
         .withModuleSplitStyle(
-          ModuleSplitStyle.SmallModulesFor(List("livechart"))
+          ModuleSplitStyle.SmallModulesFor(List("industries.sunshine.planningpoker"))
         )
     },
 
@@ -34,7 +34,7 @@ lazy val frontend = project
     libraryDependencies += "com.raquo" %%% "laminar" % "15.0.1",
     libraryDependencies += "io.laminext" %%% "websocket" % "0.15.0"
   )
-  .dependsOn(common)
+  .dependsOn(common.js)
 
 val circeVersion = "0.14.1"
 val http4sVersion = "1.0.0-M39"
@@ -52,18 +52,27 @@ lazy val backend = project
     // available for 2.12, 2.13, 3.2
     libraryDependencies += "co.fs2" %% "fs2-core" % "3.6.1",
     libraryDependencies += "org.typelevel" %% "cats-core" % "2.9.0",
-    libraryDependencies += "org.typelevel" %% "cats-effect" % "3.4.9",
+    libraryDependencies += "org.typelevel" %% "cats-effect" % "3.4.9"
   )
-  .dependsOn(common)
+  .dependsOn(common.jvm)
 
-lazy val common = project
+lazy val common = crossProject(JSPlatform, JVMPlatform)
+  .crossType(CrossType.Pure)
   .in(file("common"))
   .settings(
     commonSettings,
     libraryDependencies ++= Seq(
-      "io.circe" %% "circe-core",
-      "io.circe" %% "circe-generic",
-      "io.circe" %% "circe-parser"
-    ).map(_ % circeVersion),
-
+      "io.circe" %%% "circe-core",
+      "io.circe" %%% "circe-generic",
+      "io.circe" %%% "circe-parser"
+    ).map(_ % circeVersion)
   )
+
+lazy val commonJVM = common.jvm
+lazy val commonJS = common.js.settings(
+  // scalaJS specific settings
+  scalaJSLinkerConfig ~= {
+    _.withModuleKind(ModuleKind.ESModule)
+      .withModuleSplitStyle(ModuleSplitStyle.SmallModulesFor(List("industries.sunshine.planningpoker")))
+  }
+)

common/src/main/scala/industries/sunshine/planningpoker/Models.scala

@@ -2,7 +2,10 @@ package industries.sunshine.planningpoker.common
 
 import java.util.UUID
 import io.circe._
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSExportTopLevel
 
+@JSExportTopLevel("Models", "library")
 object Models {
 
   /** view of the single planning poker round

common/src/main/scala/industries/sunshine/planningpoker/Requests.scala

@@ -3,6 +3,10 @@ package industries.sunshine.planningpoker
 import io.circe.generic.semiauto._
 import io.circe._
 
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSExportTopLevel
+
+@JSExportTopLevel("Requests", "library")
 object Requests {
   final case class LogIn(roomName: String, nickname: String, password: String) derives Codec.AsObject
 }

project/plugins.sbt

@@ -1 +1,2 @@
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.1")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")