As others have mentioned, Indigo is entirely written in Scala.js. Therefore, it runs on JavaScript in browsers. There is no JVM at all at run-time. (A JVM is r

As others have mentioned, Indigo is entirely written in Scala.js. Therefore, it runs on JavaScript in browsers. There is no JVM at all at run-time. (A JVM is required to compile the code, but what you run and deploy has no dependency on any JVM stuff.) Source: I am the lead author/maintainer of Scala.js and I wrote a personal game project in Indigo.