[mikewhy]

tsc can also do that, but I think there's something else here.

I'm not really sure what this post is getting at. I trust Ry knows the issue better, but from what I've read I have the same questions as everyone else here:

- Why is Deno defining interfaces and classes like that?

- Will this mean losing type checking in projects using deno?

- Why not strip types in development and only check at commit/push/build times?