webpack.config.js

/* eslint-env node */

const path = require('path')
const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const HtmlWebpackInlineSourcePlugin = require('html-webpack-inline-source-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')

const isProduction = process.env.NODE_ENV === 'production'

let htmlConfig = {
  filename: 'index.html',
  template: 'src/index.html',
  minify: isProduction && {
    collapseWhitespace: true,
  },
}

if (isProduction) {
  htmlConfig.inlineSource = '.(js|css)$'
}

let config = {
  entry: './src/index.js',
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'script.js',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [['env', { modules: false }]],
          },
        },
      },
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: 'css-loader',
        }),
      },
    ],
  },
  plugins: [
    new ExtractTextPlugin('style.css'),
    new HtmlWebpackPlugin(htmlConfig),
    new HtmlWebpackInlineSourcePlugin(),
  ],
  stats: 'minimal',
  devServer: {
    stats: 'minimal',
  },
}

if (!isProduction) {
  config.devtool = 'eval-source-map'
} else {
  config.plugins = config.plugins.concat([
    new webpack.optimize.ModuleConcatenationPlugin(),
  ])
}

module.exports = config