├── .github
    └── workflows
    │   └── ci.yml
├── .gitignore
├── README.md
├── build.sbt
├── js
    └── src
    │   └── main
    │       └── scala
    │           └── example
    │               └── Main.scala
├── jvm
    └── src
    │   └── main
    │       └── scala
    │           └── example
    │               └── Main.scala
├── project
    ├── build.properties
    └── plugins.sbt
└── shared
    └── src
        └── main
            └── scala
                └── example
                    └── MyLibrary.scala


/.github/workflows/ci.yml:
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 1 | name: CI
 2 | on:
 3 |   push:
 4 |     branches:
 5 |       - main
 6 |   pull_request:
 7 |     branches:
 8 |       - main
 9 | jobs:
10 |   build:
11 |     runs-on: ubuntu-latest
12 |     strategy:
13 |       fail-fast: false
14 |     steps:
15 |       - uses: actions/checkout@v2
16 |       - uses: olafurpg/setup-scala@v10
17 |         with:
18 |           java-version: "adopt@1.8"
19 |       - uses: coursier/cache-action@v5
20 |       - name: Test JVM
21 |         run: sbt fooJVM/run
22 |       - name: Test JS
23 |         run: sbt fooJS/run
24 | 


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/.gitignore:
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1 | target/
2 | 


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/README.md:
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 1 | # Scala.js cross compile example
 2 | 
 3 | This is an example on how to cross compile code to Scala.js and Scala JVM.
 4 | 
 5 | To try it out, launch sbt and type:
 6 | 
 7 |     sbt> fooJS/run
 8 |     sbt> fooJVM/run
 9 | 
10 | More information can be found in the
11 | [Scala.js documentation](https://www.scala-js.org/doc/project/cross-build.html) and in the [sbt-crossproject](https://github.com/portable-scala/sbt-crossproject) plugin documentation.
12 | 


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/build.sbt:
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 1 | ThisBuild / scalaVersion := "2.13.10"
 2 | 
 3 | lazy val root = project.in(file(".")).
 4 |   aggregate(foo.js, foo.jvm).
 5 |   settings(
 6 |     publish := {},
 7 |     publishLocal := {},
 8 |   )
 9 | 
10 | lazy val foo = crossProject(JSPlatform, JVMPlatform).in(file(".")).
11 |   settings(
12 |     name := "foo",
13 |     version := "0.1-SNAPSHOT",
14 |   ).
15 |   jvmSettings(
16 |     // Add JVM-specific settings here
17 |   ).
18 |   jsSettings(
19 |     // Add JS-specific settings here
20 |     scalaJSUseMainModuleInitializer := true,
21 |   )
22 | 


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/js/src/main/scala/example/Main.scala:
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 1 | package example
 2 | 
 3 | object Main {
 4 |   def main(args: Array[String]): Unit = {
 5 |     val lib = new MyLibrary
 6 |     println(lib.sq(2))
 7 | 
 8 |     println(s"Using Scala.js version ${System.getProperty("java.vm.version")}")
 9 |   }
10 | }
11 | 


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/jvm/src/main/scala/example/Main.scala:
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 1 | package example
 2 | 
 3 | object Main {
 4 |   def main(args: Array[String]): Unit = {
 5 |     val lib = new MyLibrary
 6 |     println(lib.sq(2))
 7 | 
 8 |     println(s"Using a JVM version ${System.getProperty("java.vm.version")}")
 9 |   }
10 | }
11 | 


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/project/build.properties:
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1 | sbt.version=1.8.2
2 | 


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/project/plugins.sbt:
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1 | addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.13.0")
2 | addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.2.0")
3 | 


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/shared/src/main/scala/example/MyLibrary.scala:
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1 | package example
2 | 
3 | class MyLibrary {
4 |   def sq(x: Int): Int = x * x
5 | }
6 | 


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