In Scala.js, you lean heavily on the Javascript runtime, and on the large ecosystem of Javascript libraries. That integration into the existing ecosystem is in

In Scala.js, you lean heavily on the Javascript runtime, and on the large ecosystem of Javascript libraries. That integration into the existing ecosystem is in fact one of the big selling points of Scala.js, just like how it is a big selling point of Scala-JVM Scala has multiple host languages, and it leans heavily on each of then whenever used on that platform