"env" helper does not function as expected

[leoj3n]

The value of NODE_ENV seems to become undefined after reattachment:

Development:

Production:

Therefore the test in the provided example seems as though it would fail client side: https://github.com/donejs/done-ssr/blob/master/docs/env.md

I've also noticed a window-production mapping in steal config to remap the path of a module file on the browser client does not work. However, a duplicate mapping for window-development does work.

Why do both env.NODE_ENV and window-production seem to have issues on the client side?

Aren't we supposed to be able to check env.NODE_ENV client side and use window-production?

If so, could this be a problem with Heroku? Am I misunderstanding this feature or is this a bug?