webpack.config.js

const path = require('path');
const webpack = require('webpack');
const { WebpackManifestPlugin } = require('webpack-manifest-plugin');
const autoprefixer = require('autoprefixer');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
const CopyPlugin = require('copy-webpack-plugin');
const { getFeatureFlags } = require('./webpack-utils');

const { NODE_ENV } = process.env;
const isDev = NODE_ENV === 'development';
const outputPath = 'public';
const jsDirectory = isDev ? '' : 'js/';
const resourceFilename = isDev
  ? 'images/[name][ext]'
  : 'images/[name].[contenthash][ext]';
const mode = isDev ? NODE_ENV : 'production';
const devtool = isDev ? 'inline-source-map' : undefined;
const stats = isDev ? 'minimal' : 'none';

const uswdsDist = './node_modules/@uswds/uswds/dist';

const uswdsIncludePaths = [
  './node_modules/@uswds/uswds',
  './node_modules/@uswds/uswds/src/stylesheets',
  './node_modules/@uswds/uswds/packages',
  './frontend/sass',
  './public',
];

const RESOURCE_GENERATOR = {
  filename: resourceFilename,
};

const FONT_GENERATOR = {
  filename: './fonts/[name][ext]',
};

const svgoConfig = {
  plugins: [
    {
      name: 'preset-default',
      params: {
        overrides: {
          removeViewBox: false,
        },
      },
    },
  ],
};

const plugins = [
  // Make sure this is the first plugin!!!
  new MiniCssExtractPlugin({
    filename: 'styles.css',
  }),
  new CopyPlugin({
    patterns: [
      {
        from: `${uswdsDist}/img`,
        to: 'img',
      },
      {
        from: `${uswdsDist}/js`,
        to: 'js',
      },
    ],
  }),
  // When webpack bundles moment, it includes all of its locale files,
  // which we don't need, so we'll use this plugin to keep them out of the
  // bundle
  new webpack.IgnorePlugin({
    resourceRegExp: /^\.\/locale$/,
    contextRegExp: /moment$/,
  }),
  new webpack.EnvironmentPlugin([
    ...getFeatureFlags(process.env),
    'APP_HOSTNAME',
    'PRODUCT',
    'PROXY_DOMAIN',
  ]),
];

if (isDev) {
  plugins.push(
    new BundleAnalyzerPlugin({
      analyzerHost: '0.0.0.0',
      analyzerPort: '8888',
    }),
  );
}

if (!isDev) {
  plugins.push(
    new WebpackManifestPlugin({
      fileName: '../webpack-manifest.json',
      publicPath: '',
    }),
  );
}

module.exports = {
  mode,
  entry: {
    bundle: './frontend/main.jsx',
    report: './frontend/mainReport.jsx',
  },
  devtool,
  stats,
  output: {
    filename: `${jsDirectory}[name].js`,
    path: path.resolve(__dirname, outputPath),
    publicPath: '/',
  },
  resolve: {
    extensions: ['.js', '.jsx'],
    alias: {
      '@shared': path.resolve(__dirname, 'frontend/shared'),
      '@actions': path.resolve(__dirname, 'frontend/actions'),
      '@hooks': path.resolve(__dirname, 'frontend/hooks'),
      '@util': path.resolve(__dirname, 'frontend/util'),
      '@selectors': path.resolve(__dirname, 'frontend/selectors'),
      '@pages': path.resolve(__dirname, 'frontend/pages'),
      '@globals': path.resolve(__dirname, 'frontend/globals'),
      '@propTypes': path.resolve(__dirname, 'frontend/propTypes'),
      '@support': path.resolve(__dirname, 'frontend/support'),
    },
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /(node_modules|bower_components|public\/)/,
        loader: 'babel-loader',
      },
      {
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              url: {
                filter: (url) => !(url.includes('img') || url.includes('images')),
              },
            },
          },
          {
            loader: 'postcss-loader',
            options: {
              sourceMap: true,
              postcssOptions: {
                plugins: [autoprefixer],
              },
            },
          },
          {
            loader: 'sass-loader',
            options: {
              sassOptions: {
                quietDeps: true,
                includePaths: uswdsIncludePaths,
              },
            },
          },
        ],
      },
      {
        test: /\.svg$/i,
        oneOf: [
          {
            // For .svg files in public/images/icons/,
            // use the @svgr/webpack loader
            // so that they can be loaded as React components
            include: path.resolve(__dirname, 'public/images/icons'),
            use: [
              {
                loader: '@svgr/webpack',
                options: {
                  svgoConfig,
                },
              },
            ],
          },
          {
            // For all other .svg files, fallback to asset/resource
            type: 'asset/resource',
            generator: RESOURCE_GENERATOR,
          },
        ],
      },
      {
        test: /\.(gif|png|jpe?g)$/i,
        type: 'asset/resource',
        generator: RESOURCE_GENERATOR,
      },
      {
        test: /\.(ttf|woff2?|eot)$/i,
        type: 'asset/resource',
        generator: FONT_GENERATOR,
      },
    ],
  },
  plugins,
};