Wasm will not influence Scala.js' semantics. Scala.js "folding back into Scala" would be a regression as far as development for JavaScript platforms goes. Scala

Wasm will not influence Scala.js' semantics. Scala.js "folding back into Scala" would be a regression as far as development for JavaScript platforms goes. Scala without Scala.js means a Scala that cannot interact with its environment, which has JavaScript APIs (e.g., the DOM). I am looking forward to Wasm with GC features as a different target for Scala.js (not Scala), with the same semantics, but different trade-offs in terms of performance and compactness. Scala moving to DOT-based foundations is orthogonal to Scala.js. We'll have to rewrite parts of the compiler to adapt to dotty's internal, of course (and that is being done [1]), but at the language level, it is entirely orthogonal. Of course, we'll benefit from a better union type, which is very important for Scala.js, but it's not really a language interaction. [1] https://github.com/lampepfl/dotty/pull/5143 https://github.com/lampepfl/dotty/pull/5143