webpack.config.js

'use strict';

const path = require('path');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

const NODE_ENV = process.env.NODE_ENV || 'development';
const isDev = NODE_ENV === 'development';

module.exports = {
  context: path.resolve('app/'),

  entry: {
    index: './index',
  },

  output: {
    path: path.resolve('public/build/'),
    publicPath: '/build/',
    filename: '[name].js',
  },

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: [
            ['env', {
              targets: {
                browsers: 'last 2 versions',
              },
              modules: false,
            }],
          ],
        },
      },
      {
        test: /\.css$/,
        loader: ExtractTextPlugin.extract({
          use: [
            {
              loader: 'css-loader',
              options: {
                modules: true,
                camelCase: true,
                importLoaders: 1,
                localIdentName: isDev ? '[path][name]-[local]-[hash:base64:5]' : '[hash:base64]',
              },
            },
            {
              loader: 'postcss-loader',
            },
          ],
          fallback: 'style-loader',
        }),
      },
    ],
  },

  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify(NODE_ENV),
      },
    }),
    new webpack.ProvidePlugin({
      fetch: 'imports-loader?this=>global!exports-loader?global.fetch!whatwg-fetch',
    }),
    new webpack.optimize.CommonsChunkPlugin({name: 'common'}),
    new ExtractTextPlugin({
      filename: '[name].css',
      allChunks: true,
      ignoreOrder: true,
      disable: isDev,
    }),
  ],

  devtool: 'source-map',
};