process.env does not expose its keys as expected

I’m not sure if this is expected, but it doesn’t feel right.

If I run an app with

$ REACT_APP_FOO=bar npm start

I can access process.env.REACT_APP_FOO, but REACT_APP_FOO in process.env returns false, and process.env["REACT_APP_FOO"] is undefined.

I’m trying to have something like:

function getConfig(key) {
   if (key in process.env) {
     return process.env[key];
   }

   return defaults[key];
}

[fson]

This is going to be included in 0.7.0, which will be out soon.

[gaearon]

Fixed in #807.