Environment variables

webpack.config.js

var webpack = require('webpack');
var path = require('path');
var LiveReloadPlugin = require('webpack-livereload-plugin');

var BUILD_DIR = path.resolve(__dirname, 'assets/built');
var APP_DIR = path.resolve(__dirname, 'assets/js');

let variables = {};
if (process.env.NODE_ENV === 'production') {
    variables = { // could be a file
        stripe: {
            key: 'pk_live_...'
        }
    };
} else {
    variables = {
        stripe: { // could be a file
            key: 'pk_test_...'
        }
    };
}

var config = {
    entry: APP_DIR + '/app.jsx',
    output: {
        path: BUILD_DIR,
        filename: '[name].js'
    },
    module: {
        rules: [
            {
                test: /\.jsx?/,
                include: APP_DIR,
                loader: 'babel-loader'
            }
        ]
    },
    plugins: [
        new webpack.DefinePlugin({'process.env': JSON.stringify(variables)})
    ]
};


module.exports = config;