Execute JavaScript dynamically in Scala

ExecuteJavaScriptDynamically.scala

def main(args: Array[String]): Unit = {
  import javax.script.ScriptEngineManager
  import scala.concurrent.duration._
  import scala.concurrent.ExecutionContext.Implicits.global

  val engine = new ScriptEngineManager().getEngineByMimeType("text/javascript")
  // val script = "-1000 * %d" format 3
  val endless = "(function foo() { foo(); })()"
  val result = Await.result(Future(engine.eval(endless)), 3.millis)
  println(result)
}