Webpack EnvironmentPlugin

webpack.config.js

// Webpack's poorly-documented EnvironmentPlugin
//
// Read more here: https://github.com/webpack/webpack/blob/master/lib/EnvironmentPlugin.js

var webpack = require('webpack');

module.exports = { 
  plugins: [
    new webpack.EnvironmentPlugin([
      'NODE_ENV'
    ])
  ]
}

with this, you should be able to pass your NODE_ENV to the webpack build process (e.g. NODE_ENV=production webpack) and in your code, you can use process.env.NODE_ENV to decide what to do differently based on the value of NODE_ENV.

Just wanted to thank you for this, I wonder why this is not more popular tho!