webpack.config.js

var webpack = require('webpack');
var autoprefixer = require('autoprefixer');
var precss = require('precss');

module.exports = {
    entry: './components/App.js',
    output: {
        path: './build',
        filename: 'bundle.js'
    },

    plugins: [
        new webpack.ContextReplacementPlugin(/moment[\/\\]locale$/, /nb$/),
        new webpack.DefinePlugin({
            'process.env': {
                NODE_ENV: JSON.stringify('production')
            }
        })        
    ],

    module: {
        loaders: [
            { test: /\.scss$/, loader: 'style!css!postcss!sass' },
            { test: /\.css$/, loader: 'style!css!postcss' },
            { test: /\.(ttf|eot|otf|svg|woff|woff2)(\?.+)?$/, loader: 'url-loader?limit=10000' },
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/,
                query: {
                    presets: ['es2015', 'react', 'stage-0']
                }
            }
        ]
    },

    postcss: function() {
        return [autoprefixer, precss];
    }
};