Tutorial by Examples

println("Hello Scala.js") // In ES6: console.log("Hello Scala.js");

val lastNames = people.map(p => p.lastName) // Or shorter: val lastNames = people.map(_.lastName)

class Person(val firstName: String, val lastName: String) { def fullName(): String = s"$firstName $lastName" }

val personMap = Map( 10 -> new Person("Roger", "Moore"), 20 -> new Person("James", "Bond") ) val names = for { (key, person) <- personMap if key > 15 } yield s"$key = ${person.firstName}"

import org.scalajs.dom import dom.document def appendP(target: dom.Node, text: String) = { val pNode = document.createElement("p") val textNode = document.createTextNode(text) pNode.appendChild(textNode) target.appendChild(pNode) }

Sbt dependency libraryDependencies += "org.scala-js" %%% "scalajs-dom" % "0.9.1" // (Triple %%%) Running sbt run Running with continous compilation: sbt ~run Compile to a single JavaScript file: sbt fastOptJS