With webpack that would be accomplished with something like
See also: Should I move from brunch to webpack? - #14 by peerreynders
I’m using Brunch and Babel (added by the framework).
I assume that “the framework” refers to Phoenix.
https://github.com/phoenixframework/phoenix/pull/2779
Description how to use webpack 4 (with Phoenix 1.3.x) instead of brunch:
https://github.com/kokolegorille/app/blob/master/WEBPACK4.md
That being said recommended practice is to limit the reliance on environment variables to one, single variable typically process.env.NODE_ENV - which is then used to select the correct module (e.g. settings.prod.js vs. settings.dev.js) to include in the generated JS bundle.
SurviveJS: Choosing which module to use
A similar approach seems to be possible with brunch with the jsenv-brunch plugin (npm).
