Viewing github.com/facebook/react/fixtures/flight/config/webpack.config.js

```
'use strict';
```
```
// Fork Start
```

const ReactFlightWebpackPlugin = require('react-server-dom-webpack/plugin');

```
// Fork End
```
```
const fs = require('fs');
```

const {createHash} = require('crypto');

```
const path = require('path');
```
```
const webpack = require('webpack');
```
```
const resolve = require('resolve');
```

const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');

const TerserPlugin = require('terser-webpack-plugin');

const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');

const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');

```
const paths = require('./paths');
```
```
const modules = require('./modules');
```

const getClientEnvironment = require('./env');

const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');

```
const ForkTsCheckerWebpackPlugin =
```

  process.env.TSC_COMPILE_ON_ERROR === 'true'

    ? require('react-dev-utils/ForkTsCheckerWarningWebpackPlugin')

    : require('react-dev-utils/ForkTsCheckerWebpackPlugin');

const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin');

const {WebpackManifestPlugin} = require('webpack-manifest-plugin');

```
function createEnvironmentHash(env) {
```
```
  const hash = createHash('md5');
```
```
  hash.update(JSON.stringify(env));
```
```
  return hash.digest('hex');
```
```
}
```

// Source maps are resource heavy and can cause out of memory issue for large source files.

const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';

const reactRefreshRuntimeEntry = require.resolve('react-refresh/runtime');

const reactRefreshWebpackPluginRuntimeEntry = require.resolve(

  '@pmmmwh/react-refresh-webpack-plugin'

```
);
```

const babelRuntimeEntry = require.resolve('babel-preset-react-app');

const babelRuntimeEntryHelpers = require.resolve(

  '@babel/runtime/helpers/esm/assertThisInitialized',

```
  {paths: [babelRuntimeEntry]}
```
```
);
```

const babelRuntimeRegenerator = require.resolve('@babel/runtime/regenerator', {

```
  paths: [babelRuntimeEntry],
```
```
});
```

// Some apps do not need the benefits of saving a web request, so not inlining the chunk

```
// makes for a smoother build process.
```

const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';

```
const imageInlineSizeLimit = parseInt(
```

  process.env.IMAGE_INLINE_SIZE_LIMIT || '10000'

```
);
```
```
// Check if TypeScript is setup
```

const useTypeScript = fs.existsSync(paths.appTsConfig);

```
// Check if Tailwind config exists
```
```
const useTailwind = fs.existsSync(
```

  path.join(paths.appPath, 'tailwind.config.js')

```
);
```

// Get the path to the uncompiled service worker (if it exists).

```
const swSrc = paths.swSrc;
```
```
// style files regexes
```
```
const cssRegex = /\.css$/;
```

const cssModuleRegex = /\.module\.css$/;

```
const sassRegex = /\.(scss|sass)$/;
```

const sassModuleRegex = /\.module\.(scss|sass)$/;

```
const hasJsxRuntime = (() => {
```

  if (process.env.DISABLE_NEW_JSX_TRANSFORM === 'true') {

```
    return false;
```
```
  }
```
```
  try {
```

    require.resolve('react/jsx-runtime');

```
    return true;
```
```
  } catch (e) {
```
```
    return false;
```
```
  }
```
```
})();
```

// This is the production and development configuration.

// It is focused on developer experience, fast rebuilds, and a minimal bundle.

module.exports = function (webpackEnv) {

  const isEnvDevelopment = webpackEnv === 'development';

  const isEnvProduction = webpackEnv === 'production';

  // Variable used for enabling profiling in Production

  // passed into alias object. Uses a flag if passed into the build command

```
  const isEnvProductionProfile =
```

    isEnvProduction && process.argv.includes('--profile');

  // We will provide `paths.publicUrlOrPath` to our app

  // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.

  // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.

  // Get environment variables to inject into our app.

  const env = getClientEnvironment(paths.publicUrlOrPath.slice(0, -1));

  const shouldUseReactRefresh = env.raw.FAST_REFRESH;

  // common function to get style loaders

  const getStyleLoaders = (cssOptions, preProcessor) => {

```
    const loaders = [
```

      isEnvDevelopment && require.resolve('style-loader'),

```
      {
```

        loader: MiniCssExtractPlugin.loader,

        // css is located in `static/css`, use '../../' to locate index.html folder

        // in production `paths.publicUrlOrPath` can be a relative path

        options: paths.publicUrlOrPath.startsWith('.')

```
          ? {publicPath: '../../'}
```
```
          : {},
```
```
      },
```
```
      {
```

        loader: require.resolve('css-loader'),

```
        options: cssOptions,
```
```
      },
```
```
      {
```

        // Options for PostCSS as we reference these options twice

        // Adds vendor prefixing based on your specified browser support in

```
        // package.json
```

        loader: require.resolve('postcss-loader'),

```
        options: {
```
```
          postcssOptions: {
```

            // Necessary for external CSS imports to work

            // https://github.com/facebook/create-react-app/issues/2677

```
            ident: 'postcss',
```
```
            config: false,
```
```
            plugins: !useTailwind
```
```
              ? [
```

                  'postcss-flexbugs-fixes',

```
                  [
```

                    'postcss-preset-env',

```
                    {
```
```
                      autoprefixer: {
```

                        flexbox: 'no-2009',

```
                      },
```
```
                      stage: 3,
```
```
                    },
```
```
                  ],
```

                  // Adds PostCSS Normalize as the reset css with default options,

                  // so that it honors browserslist config in package.json

                  // which in turn let's users customize the target behavior as per their needs.

```
                  'postcss-normalize',
```
```
                ]
```
```
              : [
```
```
                  'tailwindcss',
```

                  'postcss-flexbugs-fixes',

```
                  [
```

                    'postcss-preset-env',

```
                    {
```
```
                      autoprefixer: {
```

                        flexbox: 'no-2009',

```
                      },
```
```
                      stage: 3,
```
```
                    },
```
```
                  ],
```
```
                ],
```
```
          },
```

          sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,

```
        },
```
```
      },
```
```
    ].filter(Boolean);
```
```
    if (preProcessor) {
```
```
      loaders.push(
```
```
        {
```

          loader: require.resolve('resolve-url-loader'),

```
          options: {
```

            sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,

```
            root: paths.appSrc,
```
```
          },
```
```
        },
```
```
        {
```

          loader: require.resolve(preProcessor),

```
          options: {
```
```
            sourceMap: true,
```
```
          },
```
```
        }
```
```
      );
```
```
    }
```
```
    return loaders;
```
```
  };
```
```
  return {
```
```
    target: ['browserslist'],
```

    // Webpack noise constrained to errors and warnings

```
    stats: 'errors-warnings',
```

    mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',

    // Stop compilation early in production

```
    bail: isEnvProduction,
```
```
    devtool: isEnvProduction
```
```
      ? shouldUseSourceMap
```
```
        ? 'source-map'
```
```
        : false
```

      : isEnvDevelopment && 'cheap-module-source-map',

    // These are the "entry points" to our application.

    // This means they will be the "root" imports that are included in JS bundle.

```
    entry: isEnvProduction
```
```
      ? [paths.appIndexJs]
```
```
      : [
```
```
          paths.appIndexJs,
```
```
          // HMR client
```

          'webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000',

```
        ],
```
```
    output: {
```
```
      // The build folder.
```
```
      path: paths.appBuild,
```

      // Add /* filename */ comments to generated require()s in the output.

```
      pathinfo: isEnvDevelopment,
```

      // There will be one main bundle, and one file per asynchronous chunk.

      // In development, it does not produce real files.

```
      filename: isEnvProduction
```

        ? 'static/js/[name].[contenthash:8].js'

        : isEnvDevelopment && 'static/js/bundle.js',

      // There are also additional JS chunk files if you use code splitting.

```
      chunkFilename: isEnvProduction
```

        ? 'static/js/[name].[contenthash:8].chunk.js'

        : isEnvDevelopment && 'static/js/[name].chunk.js',

      assetModuleFilename: 'static/media/[name].[hash][ext]',

      // webpack uses `publicPath` to determine where the app is being served from.

      // It requires a trailing slash, or the file assets will get an incorrect path.

      // We inferred the "public path" (such as / or /my-project) from homepage.

      publicPath: paths.publicUrlOrPath,

      // Point sourcemap entries to original disk location (format as URL on Windows)

      devtoolModuleFilenameTemplate: isEnvProduction

```
        ? info =>
```
```
            path
```

              .relative(paths.appSrc, info.absoluteResourcePath)

```
              .replace(/\\/g, '/')
```
```
        : isEnvDevelopment &&
```

          (info => path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')),

```
    },
```
```
    cache: {
```
```
      type: 'filesystem',
```

      version: createEnvironmentHash(env.raw),

      cacheDirectory: paths.appWebpackCache,

```
      store: 'pack',
```
```
      buildDependencies: {
```

        defaultWebpack: ['webpack/lib/'],

```
        config: [__filename],
```

        tsconfig: [paths.appTsConfig, paths.appJsConfig].filter(f =>

```
          fs.existsSync(f)
```
```
        ),
```
```
      },
```
```
    },
```
```
    infrastructureLogging: {
```
```
      level: 'none',
```
```
    },
```
```
    optimization: {
```
```
      minimize: isEnvProduction,
```
```
      minimizer: [
```

        // This is only used in production mode

```
        new TerserPlugin({
```
```
          terserOptions: {
```
```
            parse: {
```

              // We want terser to parse ecma 8 code. However, we don't want it

              // to apply any minification steps that turns valid ecma 5 code

              // into invalid ecma 5 code. This is why the 'compress' and 'output'

              // sections only apply transformations that are ecma 5 safe

              // https://github.com/facebook/create-react-app/pull/4234

```
              ecma: 8,
```
```
            },
```
```
            compress: {
```
```
              ecma: 5,
```
```
              warnings: false,
```

              // Disabled because of an issue with Uglify breaking seemingly valid code:

              // https://github.com/facebook/create-react-app/issues/2376

              // Pending further investigation:

              // https://github.com/mishoo/UglifyJS2/issues/2011

```
              comparisons: false,
```

              // Disabled because of an issue with Terser breaking valid code:

              // https://github.com/facebook/create-react-app/issues/5250

              // Pending further investigation:

              // https://github.com/terser-js/terser/issues/120

```
              inline: 2,
```
```
            },
```
```
            mangle: {
```
```
              safari10: true,
```
```
            },
```

            // Added for profiling in devtools

            keep_classnames: isEnvProductionProfile,

            keep_fnames: isEnvProductionProfile,

```
            output: {
```
```
              ecma: 5,
```
```
              comments: false,
```

              // Turned on because emoji and regex is not minified properly using default

              // https://github.com/facebook/create-react-app/issues/2488

```
              ascii_only: true,
```
```
            },
```
```
          },
```
```
        }),
```

        // This is only used in production mode

```
        new CssMinimizerPlugin(),
```
```
      ],
```
```
    },
```
```
    resolve: {
```

      // This allows you to set a fallback for where webpack should look for modules.

      // We placed these paths second because we want `node_modules` to "win"

      // if there are any conflicts. This matches Node resolution mechanism.

      // https://github.com/facebook/create-react-app/issues/253

      modules: ['node_modules', paths.appNodeModules].concat(

        modules.additionalModulePaths || []

```
      ),
```

      // These are the reasonable defaults supported by the Node ecosystem.

      // We also include JSX as a common component filename extension to support

      // some tools, although we do not recommend using it, see:

      // https://github.com/facebook/create-react-app/issues/290

      // `web` extension prefixes have been added for better support

```
      // for React Native Web.
```

      extensions: paths.moduleFileExtensions

```
        .map(ext => `.${ext}`)
```

        .filter(ext => useTypeScript || !ext.includes('ts')),

```
      alias: {
```
```
        // Support React Native Web
```

        // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/

        'react-native': 'react-native-web',

        // Allows for better profiling with ReactDevTools

        ...(isEnvProductionProfile && {

          'react-dom$': 'react-dom/profiling',

          'scheduler/tracing': 'scheduler/tracing-profiling',

```
        }),
```

        ...(modules.webpackAliases || {}),

```
      },
```
```
      plugins: [
```

        // Prevents users from importing files from outside of src/ (or node_modules/).

        // This often causes confusion because we only process files within src/ with babel.

        // To fix this, we prevent you from importing files out of src/ -- if you'd like to,

        // please link the files into your node_modules/ and let module-resolution kick in.

        // Make sure your source files are compiled, as they will not be processed in any way.

        new ModuleScopePlugin(paths.appSrc, [

```
          paths.appPackageJson,
```
```
          reactRefreshRuntimeEntry,
```

          reactRefreshWebpackPluginRuntimeEntry,

```
          babelRuntimeEntry,
```
```
          babelRuntimeEntryHelpers,
```
```
          babelRuntimeRegenerator,
```
```
        ]),
```
```
      ],
```
```
    },
```
```
    module: {
```
```
      strictExportPresence: true,
```
```
      rules: [
```

        // Handle node_modules packages that contain sourcemaps

```
        shouldUseSourceMap && {
```
```
          enforce: 'pre',
```

          exclude: /@babel(?:\/|\\{1,2})runtime/,

          test: /\.(js|mjs|jsx|ts|tsx|css)$/,

          loader: require.resolve('source-map-loader'),

```
        },
```
```
        {
```

          // "oneOf" will traverse all following loaders until one will

          // match the requirements. When no loader matches it will fall

          // back to the "file" loader at the end of the loader list.

```
          oneOf: [
```

            // TODO: Merge this config once `image/avif` is in the mime-db

            // https://github.com/jshttp/mime-db

```
            {
```
```
              test: [/\.avif$/],
```
```
              type: 'asset',
```
```
              mimetype: 'image/avif',
```
```
              parser: {
```
```
                dataUrlCondition: {
```

                  maxSize: imageInlineSizeLimit,

```
                },
```
```
              },
```
```
            },
```

            // "url" loader works like "file" loader except that it embeds assets

            // smaller than specified limit in bytes as data URLs to avoid requests.

            // A missing `test` is equivalent to a match.

```
            {
```

              test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],

```
              type: 'asset',
```
```
              parser: {
```
```
                dataUrlCondition: {
```

                  maxSize: imageInlineSizeLimit,

```
                },
```
```
              },
```
```
            },
```
```
            {
```
```
              test: /\.svg$/,
```
```
              use: [
```
```
                {
```

                  loader: require.resolve('@svgr/webpack'),

```
                  options: {
```
```
                    prettier: false,
```
```
                    svgo: false,
```
```
                    svgoConfig: {
```

                      plugins: [{removeViewBox: false}],

```
                    },
```
```
                    titleProp: true,
```
```
                    ref: true,
```
```
                  },
```
```
                },
```
```
                {
```

                  loader: require.resolve('file-loader'),

```
                  options: {
```

                    name: 'static/media/[name].[hash].[ext]',

```
                  },
```
```
                },
```
```
              ],
```
```
              issuer: {
```

                and: [/\.(ts|tsx|js|jsx|md|mdx)$/],

```
              },
```
```
            },
```

            // Process application JS with Babel.

            // The preset includes JSX, Flow, TypeScript, and some ESnext features.

```
            {
```

              test: /\.(js|mjs|jsx|ts|tsx)$/,

```
              include: paths.appSrc,
```

              loader: require.resolve('babel-loader'),

```
              options: {
```

                customize: require.resolve(

                  'babel-preset-react-app/webpack-overrides'

```
                ),
```
```
                presets: [
```
```
                  [
```

                    require.resolve('babel-preset-react-app'),

```
                    {
```

                      runtime: hasJsxRuntime ? 'automatic' : 'classic',

```
                    },
```
```
                  ],
```
```
                ],
```
```
                plugins: [
```
```
                  isEnvDevelopment &&
```

                    shouldUseReactRefresh &&

                    require.resolve('react-refresh/babel'),

```
                ].filter(Boolean),
```

                // This is a feature of `babel-loader` for webpack (not Babel itself).

                // It enables caching results in ./node_modules/.cache/babel-loader/

                // directory for faster rebuilds.

```
                cacheDirectory: true,
```

                // See #6846 for context on why cacheCompression is disabled

                cacheCompression: false,

                compact: isEnvProduction,

```
              },
```
```
            },
```

            // Process any JS outside of the app with Babel.

            // Unlike the application JS, we only compile the standard ES features.

```
            {
```
```
              test: /\.(js|mjs)$/,
```

              exclude: /@babel(?:\/|\\{1,2})runtime/,

              loader: require.resolve('babel-loader'),

```
              options: {
```
```
                babelrc: false,
```
```
                configFile: false,
```
```
                compact: false,
```
```
                presets: [
```
```
                  [
```

                    require.resolve('babel-preset-react-app/dependencies'),

```
                    {helpers: true},
```
```
                  ],
```
```
                ],
```
```
                cacheDirectory: true,
```

                // See #6846 for context on why cacheCompression is disabled

                cacheCompression: false,

                // Babel sourcemaps are needed for debugging into node_modules

                // code.  Without the options below, debuggers like VSCode

                // show incorrect code and set breakpoints on the wrong lines.

                sourceMaps: shouldUseSourceMap,

                inputSourceMap: shouldUseSourceMap,

```
              },
```
```
            },
```

            // "postcss" loader applies autoprefixer to our CSS.

            // "css" loader resolves paths in CSS and adds assets as dependencies.

            // "style" loader turns CSS into JS modules that inject <style> tags.

            // In production, we use MiniCSSExtractPlugin to extract that CSS

            // to a file, but in development "style" loader enables hot editing

```
            // of CSS.
```

            // By default we support CSS Modules with the extension .module.css

```
            {
```
```
              test: cssRegex,
```
```
              exclude: cssModuleRegex,
```
```
              use: getStyleLoaders({
```
```
                importLoaders: 1,
```

                sourceMap: isEnvProduction

```
                  ? shouldUseSourceMap
```
```
                  : isEnvDevelopment,
```
```
                modules: {
```
```
                  mode: 'icss',
```
```
                },
```
```
              }),
```

              // Don't consider CSS imports dead code even if the

              // containing package claims to have no side effects.

              // Remove this when webpack adds a warning or an error for this.

              // See https://github.com/webpack/webpack/issues/6571

```
              sideEffects: true,
```
```
            },
```

            // Adds support for CSS Modules (https://github.com/css-modules/css-modules)

            // using the extension .module.css

```
            {
```
```
              test: cssModuleRegex,
```
```
              use: getStyleLoaders({
```
```
                importLoaders: 1,
```

                sourceMap: isEnvProduction

```
                  ? shouldUseSourceMap
```
```
                  : isEnvDevelopment,
```
```
                modules: {
```
```
                  mode: 'local',
```

                  getLocalIdent: getCSSModuleLocalIdent,

```
                },
```
```
              }),
```
```
            },
```

            // Opt-in support for SASS (using .scss or .sass extensions).

            // By default we support SASS Modules with the

            // extensions .module.scss or .module.sass

```
            {
```
```
              test: sassRegex,
```

              exclude: sassModuleRegex,

```
              use: getStyleLoaders(
```
```
                {
```
```
                  importLoaders: 3,
```

                  sourceMap: isEnvProduction

                    ? shouldUseSourceMap

                    : isEnvDevelopment,

```
                  modules: {
```
```
                    mode: 'icss',
```
```
                  },
```
```
                },
```
```
                'sass-loader'
```
```
              ),
```

              // Don't consider CSS imports dead code even if the

              // containing package claims to have no side effects.

              // Remove this when webpack adds a warning or an error for this.

              // See https://github.com/webpack/webpack/issues/6571

```
              sideEffects: true,
```
```
            },
```

            // Adds support for CSS Modules, but using SASS

            // using the extension .module.scss or .module.sass

```
            {
```
```
              test: sassModuleRegex,
```
```
              use: getStyleLoaders(
```
```
                {
```
```
                  importLoaders: 3,
```

                  sourceMap: isEnvProduction

                    ? shouldUseSourceMap

                    : isEnvDevelopment,

```
                  modules: {
```
```
                    mode: 'local',
```

                    getLocalIdent: getCSSModuleLocalIdent,

```
                  },
```
```
                },
```
```
                'sass-loader'
```
```
              ),
```
```
            },
```

            // "file" loader makes sure those assets get served by WebpackDevServer.

            // When you `import` an asset, you get its (virtual) filename.

            // In production, they would get copied to the `build` folder.

            // This loader doesn't use a "test" so it will catch all modules

            // that fall through the other loaders.

```
            {
```

              // Exclude `js` files to keep "css" loader working as it injects

              // its runtime that would otherwise be processed through "file" loader.

              // Also exclude `html` and `json` extensions so they get processed

              // by webpacks internal loaders.

              exclude: [/^$/, /\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],

```
              type: 'asset/resource',
```
```
            },
```

            // ** STOP ** Are you adding a new loader?

            // Make sure to add the new loader(s) before the "file" loader.

```
          ],
```
```
        },
```
```
      ].filter(Boolean),
```
```
    },
```
```
    plugins: [
```

      new webpack.HotModuleReplacementPlugin(),

      // This gives some necessary context to module not found errors, such as

```
      // the requesting resource.
```

      new ModuleNotFoundPlugin(paths.appPath),

      // Makes some environment variables available to the JS code, for example:

      // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.

      // It is absolutely essential that NODE_ENV is set to production

```
      // during a production build.
```

      // Otherwise React will be compiled in the very slow development mode.

      new webpack.DefinePlugin(env.stringified),

      // Experimental hot reloading for React .

      // https://github.com/facebook/react/tree/main/packages/react-refresh

```
      isEnvDevelopment &&
```
```
        shouldUseReactRefresh &&
```

        new ReactRefreshWebpackPlugin({

```
          overlay: false,
```
```
        }),
```

      // Watcher doesn't work well if you mistype casing in a path so we use

      // a plugin that prints an error when you attempt to do this.

      // See https://github.com/facebook/create-react-app/issues/240

      isEnvDevelopment && new CaseSensitivePathsPlugin(),

```
      new MiniCssExtractPlugin({
```

        // Options similar to the same options in webpackOptions.output

```
        // both options are optional
```

        filename: 'static/css/[name].[contenthash:8].css',

        chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',

```
      }),
```

      // Generate a manifest containing the required script / css for each entry.

```
      new WebpackManifestPlugin({
```

        fileName: 'entrypoint-manifest.json',

        publicPath: paths.publicUrlOrPath,

        generate: (seed, files, entrypoints) => {

          const entrypointFiles = entrypoints.main.filter(

            fileName => !fileName.endsWith('.map')

```
          );
```

          const processedEntrypoints = {};

          for (let key in entrypoints) {

            processedEntrypoints[key] = {

              js: entrypoints[key].filter(

```
                filename =>
```

                  // Include JS assets but ignore hot updates because they're not

                  // safe to include as async script tags.

                  filename.endsWith('.js') &&

                  !filename.endsWith('.hot-update.js')

```
              ),
```

              css: entrypoints[key].filter(filename =>

                filename.endsWith('.css')

```
              ),
```
```
            };
```
```
          }
```
```
          return processedEntrypoints;
```
```
        },
```
```
      }),
```

      // Moment.js is an extremely popular library that bundles large locale files

      // by default due to how webpack interprets its code. This is a practical

      // solution that requires the user to opt into importing specific locales.

      // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack

      // You can remove this if you don't use Moment.js:

```
      new webpack.IgnorePlugin({
```

        resourceRegExp: /^\.\/locale$/,

```
        contextRegExp: /moment$/,
```
```
      }),
```
```
      // TypeScript type checking
```
```
      useTypeScript &&
```

        new ForkTsCheckerWebpackPlugin({

```
          async: isEnvDevelopment,
```
```
          typescript: {
```

            typescriptPath: resolve.sync('typescript', {

              basedir: paths.appNodeModules,

```
            }),
```
```
            configOverwrite: {
```
```
              compilerOptions: {
```

                sourceMap: isEnvProduction

```
                  ? shouldUseSourceMap
```
```
                  : isEnvDevelopment,
```
```
                skipLibCheck: true,
```

                inlineSourceMap: false,

```
                declarationMap: false,
```
```
                noEmit: true,
```
```
                incremental: true,
```

                tsBuildInfoFile: paths.appTsBuildInfoFile,

```
              },
```
```
            },
```
```
            context: paths.appPath,
```
```
            diagnosticOptions: {
```
```
              syntactic: true,
```
```
            },
```
```
            mode: 'write-references',
```
```
            // profile: true,
```
```
          },
```
```
          issue: {
```

            // This one is specifically to match during CI tests,

            // as micromatch doesn't match

            // '../cra-template-typescript/template/src/App.tsx'

```
            // otherwise.
```
```
            include: [
```

              {file: '../**/src/**/*.{ts,tsx}'},

              {file: '**/src/**/*.{ts,tsx}'},

```
            ],
```
```
            exclude: [
```

              {file: '**/src/**/__tests__/**'},

              {file: '**/src/**/?(*.){spec|test}.*'},

              {file: '**/src/setupProxy.*'},

              {file: '**/src/setupTests.*'},

```
            ],
```
```
          },
```
```
          logger: {
```
```
            infrastructure: 'silent',
```
```
          },
```
```
        }),
```
```
      // Fork Start
```
```
      new ReactFlightWebpackPlugin({
```
```
        isServer: false,
```
```
        clientReferences: {
```
```
          directory: './src',
```
```
          recursive: true,
```

          include: /\.(js|ts|jsx|tsx)$/,

```
        },
```
```
      }),
```
```
      // Fork End
```
```
    ].filter(Boolean),
```
```
    experiments: {
```
```
      topLevelAwait: true,
```
```
    },
```

    // Turn off performance processing because we utilize

    // our own hints via the FileSizeReporter

```
    performance: false,
```
```
  };
```
```
};
```