webpack.config.js

const webpack = require('webpack')
const path = require('path')

const DashboardPlugin = require('webpack-dashboard/plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const autoprefixer = require('autoprefixer')

const nodeEnv = process.env.NODE_ENV || 'development'
const isProduction = nodeEnv === 'production'

const jsSourcePath = path.join(__dirname, './src')
const buildPath = path.join(__dirname, './docs')
const imgPath = path.join(__dirname, './src/assets/img')
const sourcePath = path.join(__dirname, './src')

// Common plugins
const plugins = [
  new webpack.optimize.CommonsChunkPlugin({
    name: 'vendor',
    minChunks: Infinity,
    filename: 'vendor.js'
  }),
  new webpack.DefinePlugin({
    'process.env': {
      NODE_ENV: JSON.stringify(nodeEnv)
    }
  }),
  new webpack.NamedModulesPlugin(),
  new HtmlWebpackPlugin({
    template: path.join(sourcePath, 'index.html'),
    path: buildPath,
    filename: 'index.html',
    favicon: path.join(__dirname, 'src/assets/favicon.ico'),
    minify: {
      removeComments: true,
      collapseWhitespace: true,
      removeRedundantAttributes: true,
      useShortDoctype: true,
      removeEmptyAttributes: true,
      removeStyleLinkTypeAttributes: true,
      keepClosingSlash: true,
      minifyJS: true,
      minifyCSS: true,
      minifyURLs: true
    }
  }),
  new webpack.LoaderOptionsPlugin({
    options: {
      context: sourcePath
    }
  })
]

// Common rules
const rules = [{
  test: /\.(js|jsx)$/,
  exclude: /node_modules/,
  use: [
    'babel-loader'
  ]
}, {
  test: /\.(png|gif|jpg|svg)$/,
  include: imgPath,
  use: 'url-loader?limit=20480&name=assets/[name]-[hash].[ext]'
}]
if (isProduction) {
  // Production plugins
  plugins.push(
    new webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: false
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false,
        screw_ie8: true,
        conditionals: true,
        unused: true,
        comparisons: true,
        sequences: true,
        dead_code: true,
        evaluate: true,
        if_return: true,
        join_vars: true
      },
      output: {
        comments: false
      }
    }),
    new ExtractTextPlugin('style.css')
  )

  rules.push({
    test: /\.scss$/,
    loader: ExtractTextPlugin.extract({
      fallbackLoader: 'style-loader',
      loader: 'css-loader?modules!postcss-loader!sass-loader'
    })
  })
} else {
  // Development plugins
  plugins.push(
    new webpack.HotModuleReplacementPlugin(),
    new DashboardPlugin()
  )
  rules.push({
    test: /\.scss$/,
    exclude: /node_modules/,
    use: [
      'style-loader',
      'css-loader?modules&localIdentName=[name]_[local]___[hash:base64:5]',
      'postcss-loader',
      'sass-loader?sourceMap'
    ]
  })
}

module.exports = {
  devtool: 'source-map',
  context: jsSourcePath,
  entry: {
    js: './index.js',
    vendor: [
      'babel-polyfill',
      'es6-promise',
      'react-dom',
      'react-redux',
      'react-router-dom',
      'react',
      'redux-thunk',
      'redux'
    ]
  },
  output: {
    path: buildPath,
    publicPath: isProduction ? './' : '/',
    filename: 'app.js'
  },
  module: {
    rules
  },
  resolve: {
    extensions: ['.webpack-loader.js', '.web-loader.js', '.loader.js', '.js', '.jsx'],
    modules: [
      path.resolve(__dirname, 'node_modules'),
      jsSourcePath
    ]
  },
  plugins,
  devServer: {
    contentBase: isProduction ? './docs' : './src',
    historyApiFallback: true,
    port: 3000,
    compress: isProduction,
    inline: !isProduction,
    hot: !isProduction,
    host: '0.0.0.0',
    stats: {
      assets: true,
      children: false,
      chunks: false,
      hash: false,
      modules: false,
      publicPath: false,
      timings: true,
      version: false,
      warnings: true,
      colors: {
        green: '\u001b[32m'
      }
    }
  }
}