pxt

Just to add to this—the reason I find Static TypeScript particularly interesting is that it is a Microsoft project: https://github.com/microsoft/pxt/tree/master/pxtcompiler Compiling TypeScript to other targets is a significant challenge, so I think that in order for a project to become a viable alternative, it will need the resources of a big company like MS behind it. However, I'm not sure if MS or any other company currently has a great incentive to invest heavily in that. Running TypeScript on Node or Deno is good enough for most applications, and for apps that require better performance, MS already has C#, which was architected from the start to be performant (for example, allowing apps to use just value types / structs so that the GC isn't used).