A modern programming language that makes developers happier.

kotlinlang

I don’t have specific answers. Mostly because I’m not tightly involved, and also because a lot of things are not yet decided. Basically, it’s as different from kotlin@jvm as koltin@js. So main languages features are the same, but specific implementations and especially platform interop is specific. We are also working on multiplatform projects, so that you can have common kotlin code, and then some code for platform specific stuff for jvm, js and native.