webpack.config.js

const crypto = require("crypto");
const crypto_orig_createHash = crypto.createHash;
crypto.createHash = algorithm => crypto_orig_createHash(algorithm == "md4" ? "sha256" : algorithm);

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const DuplicatePackageCheckerPlugin = require('duplicate-package-checker-webpack-plugin');
const project = require('./aurelia_project/aurelia.json');
const { AureliaPlugin, ModuleDependenciesPlugin } = require('aurelia-webpack-plugin');
const { ProvidePlugin } = require('webpack');
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const WorkboxPlugin = require('workbox-webpack-plugin');
const package = require('./package.json');

// config helpers:
const ensureArray = (config) => config && (Array.isArray(config) ? config : [config]) || [];
const when = (condition, config, negativeConfig) =>
  condition ? ensureArray(config) : ensureArray(negativeConfig);

// primary config:
const version = package.version
const outDir = path.resolve(__dirname, project.platform.output);
const srcDir = path.resolve(__dirname, 'src');
const nodeModulesDir = path.resolve(__dirname, 'node_modules');
const baseUrl = '/';

const cssRules = [
  { loader: 'css-loader' },
];

const sassRules = [
  {
    loader: "sass-loader",
    options: {
      includePaths: ["node_modules"]
    }
  }
];

module.exports = ({ production } = {}, { extractCss, analyze, tests, hmr, port, host } = {}) => ({
  resolve: {
    extensions: ['.ts', '.js'],
    modules: [srcDir, 'node_modules'],
    // Enforce single aurelia-binding, to avoid v1/v2 duplication due to
    // out-of-date dependencies on 3rd party aurelia plugins
    alias: { 'aurelia-binding': path.resolve(__dirname, 'node_modules/aurelia-binding') }
  },
  entry: {
    app: ['aurelia-bootstrapper']
  },
  mode: production ? 'production' : 'development',
  output: {
    path: outDir,
    publicPath: baseUrl,
    filename: production ? '[name].[chunkhash].bundle.js' : '[name].[hash].bundle.js',
    sourceMapFilename: production ? '[name].[chunkhash].bundle.map' : '[name].[hash].bundle.map',
    chunkFilename: production ? '[name].[chunkhash].chunk.js' : '[name].[hash].chunk.js'
  },
  performance: { hints: false },
  devServer: {
    static: outDir,
    // serve index.html for all 404 (required for push-state)
    historyApiFallback: true,
    hot: hmr || project.platform.hmr,
    port: port || project.platform.port,
    host: host || project.platform.host
  },
  devtool: production ? 'nosources-source-map' : 'cheap-module-eval-source-map',
  module: {
    rules: [
      // CSS required in JS/TS files should use the style-loader that auto-injects it into the website
      // only when the issuer is a .js/.ts file, so the loaders are not applied inside html templates
      {
        test: /\.css$/i,
        issuer: [{ not: [{ test: /\.html$/i }] }],
        use: extractCss ? [{
          loader: MiniCssExtractPlugin.loader
        },
          'css-loader'
        ] : ['style-loader', ...cssRules]
      },
      {
        test: /\.css$/i,
        issuer: [{ test: /\.html$/i }],
        // CSS required in templates cannot be extracted safely
        // because Aurelia would try to require it again in runtime
        use: cssRules
      },
      {
        test: /\.scss$/,
        use: extractCss ? [{
          loader: MiniCssExtractPlugin.loader
        }, ...cssRules, ...sassRules
        ] : ['style-loader', ...cssRules, ...sassRules],
        issuer: /\.[tj]s$/i
      },
      {
        test: /\.scss$/,
        use: ['css-loader', 'sass-loader'],
        issuer: /\.html?$/i
      },
      {
        test: /\.scss$/,
        use: ['sass-loader'],
        issuer: /\.ejs?$/i
      },
      { test: /\.html$/i, loader: 'html-loader' },
      { test: /\.ts$/, loader: "ts-loader" },
      // embed small images and fonts as Data Urls and larger ones as files:
      { test: /\.(png|gif|jpg|cur)$/i, loader: 'url-loader', options: { limit: 8192 } },
      { test: /\.woff2(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'url-loader', options: { limit: 10000, mimetype: 'application/font-woff2' } },
      { test: /\.woff(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'url-loader', options: { limit: 10000, mimetype: 'application/font-woff' } },
      // load these fonts normally, as files:
      { test: /\.(ttf|eot|svg|otf)(\?v=[0-9]\.[0-9]\.[0-9])?$/i, loader: 'file-loader' },
      {
        test: /environment\.json$/i, use: [
          { loader: "app-settings-loader", options: { env: production ? 'production' : 'development' } },
        ]
      },
      ...when(tests, {
        test: /\.[jt]s$/i, loader: 'istanbul-instrumenter-loader',
        include: srcDir, exclude: [/\.(spec|test)\.[jt]s$/i],
        enforce: 'post', options: { esModules: true },
      })
    ]
  },
  plugins: [
    ...when(!tests, new DuplicatePackageCheckerPlugin()),
    new AureliaPlugin(),
    new ProvidePlugin({
      'Promise': ['promise-polyfill', 'default']
    }),
    new ModuleDependenciesPlugin({
      'aurelia-testing': ['./compile-spy', './view-spy']
    }),
    new HtmlWebpackPlugin({
      template: 'index.ejs',
      minify: production ? {
        removeComments: true,
        collapseWhitespace: true
      } : undefined,
      metadata: {
        // available in index.ejs //
        version, baseUrl,
        mode: production ? 'production' : 'development'
      }
    }),
    new CopyWebpackPlugin({
      patterns: [{
        from: srcDir + '/auth-callback.html',
        to: outDir
      }]
    }),
    // ref: https://webpack.js.org/plugins/mini-css-extract-plugin/
    ...when(extractCss, new MiniCssExtractPlugin({ // updated to match the naming conventions for the js files
      filename: production ? 'css/[name].[contenthash].bundle.css' : 'css/[name].[hash].bundle.css',
      chunkFilename: production ? 'css/[name].[contenthash].chunk.css' : 'css/[name].[hash].chunk.css'
    })),
    ...when(!tests, new CopyWebpackPlugin({
      patterns: [
        { from: 'static', to: outDir + '/static', globOptions: { ignore: ['.*'] } }]
    })), // ignore dot (hidden) files
    ...when(analyze, new BundleAnalyzerPlugin()),
    /**
     * Note that the usage of following plugin cleans the webpack output directory before build.
     * In case you want to generate any file in the output path as a part of pre-build step, this plugin will likely
     * remove those before the webpack build. In that case consider disabling the plugin, and instead use something like
     * `del` (https://www.npmjs.com/package/del), or `rimraf` (https://www.npmjs.com/package/rimraf).
     */
    new CleanWebpackPlugin.CleanWebpackPlugin(),
    new WorkboxPlugin.GenerateSW({
      // these options encourage the ServiceWorkers to get in there fast
      // and not allow any straggling "old" SWs to hang around
      clientsClaim: true,
      skipWaiting: true,
    }),
  ]
});