webpack.config.js

var webpack = require('webpack'),
  path = require('path'),
  fileSystem = require('fs-extra'),
  env = require('./build/env'),
  { CleanWebpackPlugin } = require('clean-webpack-plugin'),
  CopyWebpackPlugin = require('copy-webpack-plugin'),
  HtmlWebpackPlugin = require('html-webpack-plugin'),
  TerserPlugin = require('terser-webpack-plugin')

const ASSET_PATH = process.env.ASSET_PATH || '/'

var alias = {
  'react-dom': '@hot-loader/react-dom',
}

// load the secrets
var secretsPath = path.join(__dirname, 'secrets.' + env.NODE_ENV + '.js')

var fileExtensions = [
  'jpg',
  'jpeg',
  'png',
  'gif',
  'eot',
  'otf',
  'svg',
  'ttf',
  'woff',
  'woff2',
]

if (fileSystem.existsSync(secretsPath))
  alias['secrets'] = secretsPath


var options = {
  mode: process.env.NODE_ENV || 'development',
  entry: {
    graph: path.join(__dirname, 'src', 'pages', 'Graph', 'index.tsx'),
    options: path.join(__dirname, 'src', 'pages', 'Options', 'index.tsx'),
    popup: path.join(__dirname, 'src', 'pages', 'Popup', 'index.tsx'),
    background: path.join(__dirname, 'src', 'pages', 'Background', 'index.ts'),
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].bundle.js',
    publicPath: ASSET_PATH,
  },
  module: {
    rules: [
      {
        // look for .css or .scss files
        test: /\.(css|scss)$/,
        // in the `src` directory
        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: new RegExp('.(' + fileExtensions.join('|') + ')$'),
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
        },
        exclude: /node_modules/,
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
        exclude: /node_modules/,
      },
      { test: /\.(ts|tsx)$/, loader: 'ts-loader', exclude: /node_modules/ },
      {
        test: /\.(js|jsx)$/,
        use: [
          {
            loader: 'source-map-loader',
          },
          {
            loader: 'babel-loader',
          },
        ],
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    alias: alias,
    extensions: fileExtensions
      .map((extension) => '.' + extension)
      .concat(['.js', '.jsx', '.ts', '.tsx', '.css']),
  },
  plugins: [
    new webpack.ProgressPlugin(),
    // clean the dist folder
    new CleanWebpackPlugin({
      verbose: false,
      cleanStaleWebpackAssets: true,
    }),
    // expose and write the allowed env vars on the compiled bundle
    new webpack.EnvironmentPlugin({
      'NODE_ENV': 'development',
      'DEBUG': false,
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/manifest.json',
          to: path.join(__dirname, 'dist'),
          force: true,
          transform: function (content, path) {
            // generates the manifest file using the package.json informations
            return Buffer.from(
              JSON.stringify({
                description: process.env.npm_package_description,
                version: process.env.npm_package_version,
                ...JSON.parse(content.toString()),
              })
            )
          },
        },
      ],
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Graph', 'index.html'),
      filename: 'graph.html',
      chunks: ['graph'],
      cache: false,
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Options', 'index.html'),
      filename: 'options.html',
      chunks: ['options'],
      cache: false,
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Popup', 'index.html'),
      filename: 'popup.html',
      chunks: ['popup'],
      cache: false,
    }),
    new HtmlWebpackPlugin({
      template: path.join(
        __dirname,
        'src',
        'pages',
        'Background',
        'index.html'
      ),
      filename: 'background.html',
      chunks: ['background'],
      cache: false,
    }),
  ],
  infrastructureLogging: {
    level: 'info',
  },
}

if (env.NODE_ENV === 'development') {
  options.devtool = 'eval-cheap-module-source-map'

  options.stats = {
    // fallback value
    all: false,
    // Disable showing asset information
    assets: false,
    // Disable showing cached modules and cached assets
    cached: false,
    cachedAssets: false,
    // Disable showing children
    children: false,
    // Add build date and time information
    builtAt: true,
    // Add minimal chunk information
    chunks: true,
    chunkGroups: false,
    chunkModules: false,
    chunkOrigins: false,
    // Disable displaying the entry points with the corresponding bundles
    entrypoints: false,
    // Enable colored output
    colors: true,
    // Display errors
    errors: true,
    logging: 'error',
    // Add details to errors (like resolving log)
    errorDetails: true,
    hash: false,
    // Built modules information
    modules: false,
    // Disable showing performance hint when file size exceeds `performance.maxAssetSize`
    performance: false,
    // Add timing information
    timings: true,
    // Add webpack version information
    version: true,
    // Add warnings
    warnings: true,
    // Why modules included
    reasons: false
  }
} else {
  options.optimization = {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        extractComments: false,
      }),
    ],
  }
}

module.exports = options