webpack.config.babel.js

import { join } from 'path'
import {
  DefinePlugin,
  HotModuleReplacementPlugin,
} from 'webpack'
import HtmlWebpackPlugin from 'html-webpack-plugin'

import {
  name,
  version,
  description,
  keywords,
} from './package.json'

const {
  NODE_ENV = 'production',
  PROJECT_NAME = name || 'game',
  PROJECT_DESCRIPTION = description || '',
  PROJECT_KEYWORDS = keywords || '',
  BUILD_DIR = 'build',
  WEBPACK_DEVTOOL,
  WEBPACK_DEV_SERVER_HOST = '0.0.0.0',
  WEBPACK_DEV_SERVER_PORT = 3001,
  WEBPACK_PUBLIC_PATH = './',
  WEBPACK_HASH_LENGTH = 10,
} = process.env

const isDevelopment = NODE_ENV === 'development'
const buildDirAbsolutePath = join(__dirname, BUILD_DIR)

const entry = {
  [PROJECT_NAME]: join(__dirname, 'src/index.js'),
};

const output = {
  path: buildDirAbsolutePath,
  filename: isDevelopment ?
    `assets/[name]-[hash:${WEBPACK_HASH_LENGTH}].js` :
    `assets/[name]-[chunkhash:${WEBPACK_HASH_LENGTH}].js`,
  publicPath: isDevelopment ? '/' : WEBPACK_PUBLIC_PATH,
};

const plugins = {
  common: [
    new DefinePlugin({
      IS_DEVELOPMENT: JSON.stringify(isDevelopment),
      [`${PROJECT_NAME}_VERSION`]: version && JSON.stringify(version),
    }),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: 'src/index.ejs',
      title: PROJECT_NAME,
      meta: {
        description: PROJECT_DESCRIPTION,
        keywords: PROJECT_KEYWORDS,
      },
      inject: 'body',
      cache: true,
      minify: !isDevelopment && {
        removeComments: true,
        collapseWhitespace: true,
        conservativeCollapse: true,
      },
    }),
  ],

  development: [
    new HotModuleReplacementPlugin(),
  ],

  production: [],
};

const devServer = {
  host: WEBPACK_DEV_SERVER_HOST,
  port: WEBPACK_DEV_SERVER_PORT,
  contentBase: buildDirAbsolutePath,
  hot: true,
  stats: { colors: true },
};

const fileNameFormat = `[name]-[hash:${WEBPACK_HASH_LENGTH}].[ext]`

const getFileLoader = (location) => ({
  loader: 'file-loader',
  options: {
    name: `assets/${location}/${fileNameFormat}`,
  },
})

const graphicsLoader = getFileLoader('graphics')

const rules = {
  common: [{
    test: /\.js$/,
    exclude: /node_modules/,
    use: ['babel-loader'],
  }, {
    test: /\.(mp3|ogg|m4a|aac)$/,
    use: [getFileLoader('audio')],
  }, {
    test: /\.(ttf|woff)$/,
    use: [getFileLoader('fonts')],
  }],

  development: [{
    test: /\.(png|jpg|jpeg|gif)$/,
    use: [graphicsLoader],
  }],

  production: [{
    test: /\.(png|jpg|jpeg|gif)$/,
    use: [
      graphicsLoader, {
        loader: 'image-webpack-loader',
        options: {
          mozjpeg: {
            progressive: true,
            quality: 90,
          },
          optipng: {
            optimizationLevel: 6,
          },
          gifsicle: {
            interlaced: true,
          },
        },
      },
    ],
  }],
};

export default {
  mode: NODE_ENV,
  entry,
  output,
  devtool:
    WEBPACK_DEVTOOL ||
    (isDevelopment ? 'cheap-eval-source-map' : undefined),
  plugins: isDevelopment ?
    [...plugins.common, ...plugins.development] :
    [...plugins.common, ...plugins.production],
  module: {
    rules: isDevelopment ?
      [...rules.common, ...rules.development] :
      [...rules.common, ...rules.production],
  },
  devServer,
};