text: // @remove-on-eject-begin
  /**
   * Copyright (c) 2015-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   */
  // @remove-on-eject-end
  'use strict';
  
  const path = require('path');
  const webpack = require('webpack');
  const { StylableWebpackPlugin } = require('@stylable/webpack-plugin');
  const HtmlWebpackPlugin = require('html-webpack-plugin');
  const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
  const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
  const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
  const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
  const getClientEnvironment = require('./env');
  const paths = require('./paths');
  const ManifestPlugin = require('webpack-manifest-plugin');
  const ModuleNotFoundPlugin = require('react-dev-utils/ModuleNotFoundPlugin');
  
  // Webpack uses `publicPath` to determine where the app is being served from.
  // In development, we always serve from the root. This makes config easier.
  const publicPath = '/';
  // `publicUrl` is just like `publicPath`, but we will provide it to our app
  // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
  // Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
  const publicUrl = '';
  // Get environment variables to inject into our app.
  const env = getClientEnvironment(publicUrl);
  
  let externalLibsToTranspile = [];
  try {
      const packageJson = require(paths.appPackageJson);
      if (
          packageJson &&
          packageJson.transpileExternals &&
          Array.isArray(packageJson.transpileExternals)
      ) {
          externalLibsToTranspile = packageJson.transpileExternals.map(libName =>
              path.join(paths.appNodeModules, libName)
          );
      }
  } catch (e) {
      /* No externals to transpile is fine by us */
  }
  
  // This is the development configuration.
  // It is focused on developer experience and fast rebuilds.
  // The production configuration is different and lives in a separate file.
  module.exports = {
      mode: 'development',
      // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
      // See the discussion in https://github.com/facebook/create-react-app/issues/343
      devtool: '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: [
          // Include an alternative client for WebpackDevServer. A client's job is to
          // connect to WebpackDevServer by a socket and get notified about changes.
          // When you save a file, the client will either apply hot updates (in case
          // of CSS changes), or refresh the page (in case of JS changes). When you
          // make a syntax error, this client will display a syntax error overlay.
          // Note: instead of the default WebpackDevServer client, we use a custom one
          // to bring better experience for Create React App users. You can replace
          // the line below with these two lines if you prefer the stock client:
          // require.resolve('webpack-dev-server/client') + '?/',
          // require.resolve('webpack/hot/dev-server'),
          require.resolve('react-dev-utils/webpackHotDevClient'),
          // Finally, this is your app's code:
          paths.appIndex
          // We include the app code last so that if there is a runtime error during
          // initialization, it doesn't blow up the WebpackDevServer client, and
          // changing JS code would still trigger a refresh.
      ],
      output: {
          // Add /* filename */ comments to generated require()s in the output.
          pathinfo: true,
          // This does not produce a real file. It's just the virtual path that is
          // served by WebpackDevServer in development. This is the JS bundle
          // containing code from all our entry points, and the Webpack runtime.
          filename: 'static/js/bundle.js',
          // There are also additional JS chunk files if you use code splitting.
          chunkFilename: 'static/js/[name].chunk.js',
          // This is the URL that app is served from. We use "/" in development.
          publicPath: publicPath,
          // Point sourcemap entries to original disk location (format as URL on Windows)
          devtoolModuleFilenameTemplate: info =>
              path.resolve(info.absoluteResourcePath).replace(/\\/g, '/')
      },
      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'].concat(
              // It is guaranteed to exist because we tweak it in `env.js`
              process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
          ),
          // 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: ['.ts', '.tsx', '.mjs', '.web.js', '.js', '.json'],
          alias: {
              // @remove-on-eject-begin
              // Resolve TypeScript runtime relative to @stylable/react-scripts.
              // It usually still works on npm 3 without this but it would be
              // unfortunate to rely on, as @stylable/react-scripts could be symlinked,
              // and thus tslib might not be resolvable from the source.
              tslib: path.dirname(require.resolve('tslib/package.json')),
              // @remove-on-eject-end
              // 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'
          },
          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])
          ]
      },
      module: {
          strictExportPresence: true,
          rules: [
              // Disable require.ensure as it's not a standard language feature.
              { parser: { requireEnsure: false } },
  
              {
                  // "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: [
                      // "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$/, /\.png$/],
                          loader: require.resolve('url-loader'),
                          options: {
                              limit: 10000,
                              name: 'static/media/[name].[hash:8].[ext]'
                          }
                      },
                      // Process application sources with TypeScript.
                      {
                          test: /\.tsx?$/,
                          include: paths.appSrc,
                          loader: require.resolve('@ts-tools/webpack-loader')
                      },
                      {
                          test: /\.js$/,
                          loader: require.resolve('@ts-tools/webpack-loader'),
                          include: externalLibsToTranspile,
                          options: {
                              compilerOptions: {
                                  target: 'es5'
                              }
                          }
                      },
                      // "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|css)$/,
                          loader: require.resolve('file-loader'),
                          options: {
                              name: 'static/media/[name].[hash:8].[ext]'
                          }
                      }
                  ]
              }
              // ** STOP ** Are you adding a new loader?
              // Make sure to add the new loader(s) before the "file" loader.
          ]
      },
      plugins: [
          // Generates an `index.html` file with the <script> injected.
          new HtmlWebpackPlugin({
              inject: true,
              template: paths.appHtml
          }),
          // Makes some environment variables available in index.html.
          // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
          // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
          // In development, this will be an empty string.
          new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
          // 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 === 'development') { ... }. See `./env.js`.
          new webpack.DefinePlugin(env.stringified),
          // 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
          new CaseSensitivePathsPlugin(),
          // If you require a missing module and then `npm install` it, you still have
          // to restart the development server for Webpack to discover it. This plugin
          // makes the discovery automatic so you don't have to restart.
          // See https://github.com/facebook/create-react-app/issues/186
          new WatchMissingNodeModulesPlugin(paths.appNodeModules),
          // 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(/^\.\/locale$/, /moment$/),
          // Generate a manifest file which contains a mapping of all asset filenames
          // to their corresponding output file so that tools can pick it up without
          // having to parse `index.html`.
          new ManifestPlugin({
              fileName: 'asset-manifest.json',
              publicPath: publicPath
          }),
          // Stylable support
          new StylableWebpackPlugin()
      ],
  
      // Some libraries import Node modules but don't use them in the browser.
      // Tell Webpack to provide empty mocks for them so importing them works.
      node: {
          dgram: 'empty',
          fs: 'empty',
          net: 'empty',
          tls: 'empty',
          child_process: 'empty'
      },
      // Turn off performance processing because we utilize
      // our own hints via the FileSizeReporter
      performance: false
  };
  