This is a minimal example of scalajs integrated with play, supporting:

• Incremental Compilation of Scala.js on page refresh
• Compilation errors for scala.js displayed in the browser
• Multiple scala.js projects can be added to a play project

Scala.js projects are untouched. To wire the project you simply call

.dependsOnJs(scalaJsProjectA -> "jsfileA.js",
             scalaJsProjectB -> "jsfileB.js")              

on the play project. The dependsOnJs function is introduced by an implicit class in the ScalaJSPlay "plugin" (at project/ScalaJSPlay.scala)