Install devDependencies on Heroku

Question

I would like to have Heroku build my app after I push it so that I don\'t have to push the build folder up every time I make a change. However heroku only installs the depen

Answer 1

scripts": {
  ...
  "heroku-prebuild": "npm install --only=dev"
}

This was enough for me. Thanks to PixnBits for the hint about heroku-prebuild. Also - my problem was with babel. I ended up moving babel-preset-es2015 and other presets into dependencies otherwise babel complained about presets.

Update: 8/11/2017 I've been having trouble with this. It seems like things have changed (and npm is on 5.3 now). But what I see is that the heroku-prebuild script is getting run, and then the post-install script is getting run (but I was only trying to install -dev).

So what I have been doing that works is to just run:

heroku config:set NPM_CONFIG_PRODUCTION=false

And just leave it set that way. I'd love a better solution.