frontend/config/webpack.config.js

const fs = require("fs")
const path = require("path")
const webpack = require("webpack")
const resolve = require("resolve")
const PnpWebpackPlugin = require("pnp-webpack-plugin")
const HtmlWebpackPlugin = require("html-webpack-plugin")
const CaseSensitivePathsPlugin = require("case-sensitive-paths-webpack-plugin")
const InlineChunkHtmlPlugin = require("react-dev-utils/InlineChunkHtmlPlugin")
const TerserPlugin = require("terser-webpack-plugin")
const MiniCssExtractPlugin = require("mini-css-extract-plugin")
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin")
const safePostCssParser = require("postcss-safe-parser")
const ManifestPlugin = require("webpack-manifest-plugin")
const InterpolateHtmlPlugin = require("react-dev-utils/InterpolateHtmlPlugin")
const WorkboxWebpackPlugin = require("workbox-webpack-plugin")
const WatchMissingNodeModulesPlugin = require("react-dev-utils/WatchMissingNodeModulesPlugin")
const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin")
const getCSSModuleLocalIdent = require("react-dev-utils/getCSSModuleLocalIdent")
const ESLintPlugin = require("eslint-webpack-plugin")
const paths = require("./paths")
const modules = require("./modules")
const getClientEnvironment = require("./env")
const ModuleNotFoundPlugin = require("react-dev-utils/ModuleNotFoundPlugin")
const ForkTsCheckerWebpackPlugin = require("react-dev-utils/ForkTsCheckerWebpackPlugin")
const typescriptFormatter = require("react-dev-utils/typescriptFormatter")
const ReactRefreshWebpackPlugin = require("@pmmmwh/react-refresh-webpack-plugin")

const postcssNormalize = require("postcss-normalize")

const appPackageJson = require(paths.appPackageJson)
// Source maps are resource heavy and can cause out of memory issue for large source files.
// const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
const shouldUseSourceMap = false
const webpackDevClientEntry = require.resolve("react-dev-utils/webpackHotDevClient")
const reactRefreshOverlayEntry = require.resolve("react-dev-utils/refreshOverlayInterop")

// 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 emitErrorsAsWarnings = process.env.ESLINT_NO_DEV_ERRORS === "true"
const disableESLintPlugin = process.env.DISABLE_ESLINT_PLUGIN === "true"

const imageInlineSizeLimit = parseInt(process.env.IMAGE_INLINE_SIZE_LIMIT || "10000")

// Check if TypeScript is setup
const useTypeScript = fs.existsSync(paths.appTsConfig)

// 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)$/
const sassModuleRegex = /\.module\.(scss|sass)$/
//配置less
const lessRegex = /\.less$/
const lessModuleRegex = /\.module\.less$/

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"),
      isEnvProduction && {
        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
      },
      {
        loader: require.resolve("less-loader")
      },
      {
        // 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: {
          // Necessary for external CSS imports to work
          // https://github.com/facebook/create-react-app/issues/2677
          ident: "postcss",
          plugins: () => [
            require("postcss-flexbugs-fixes"),
            require("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.
            postcssNormalize()
          ],
          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 {
    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:
      isEnvDevelopment && !shouldUseReactRefresh
        ? [
            // 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'),
            //
            // When using the experimental react-refresh integration,
            // the webpack plugin takes care of injecting the dev client for us.
            webpackDevClientEntry,
            // Finally, this is your app's code:
            paths.appIndexJs
            // 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.
          ]
        : paths.appIndexJs,
    output: {
      // The build folder.
      path: isEnvProduction ? paths.appBuild : undefined,
      // 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",
      // TODO: remove this when upgrading to webpack 5
      futureEmitAssets: true,
      // 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",
      // 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, "/")),
      // Prevents conflicts when multiple webpack runtimes (from different apps)
      // are used on the same page.
      jsonpFunction: `webpackJsonp${appPackageJson.name}`,
      // this defaults to 'window', but by setting it to 'this' then
      // module chunks which are built will work in web workers as well.
      globalObject: "this"
    },

    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,
              drop_console: true,
              drop_debugger: true
            },
            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
            }
          },
          sourceMap: shouldUseSourceMap
        }),
        // This is only used in production mode
        new OptimizeCSSAssetsPlugin({
          cssProcessorOptions: {
            parser: safePostCssParser,
            map: shouldUseSourceMap
              ? {
                  // `inline: false` forces the sourcemap to be output into a
                  // separate file
                  inline: false,
                  // `annotation: true` appends the sourceMappingURL to the end of
                  // the css file, helping the browser find the sourcemap
                  annotation: true
                }
              : false
          },
          cssProcessorPluginOptions: {
            preset: ["default", { minifyFontValues: { removeQuotes: false } }]
          }
        })
      ],
      // Automatically split vendor and commons
      // https://twitter.com/wSokra/status/969633336732905474
      // https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
      splitChunks: {
        chunks: "all",
        name: isEnvDevelopment
      },
      // Keep the runtime chunk separated to enable long term caching
      // https://twitter.com/wSokra/status/969679223278505985
      // https://github.com/facebook/create-react-app/issues/5358
      runtimeChunk: {
        name: (entrypoint) => `runtime-${entrypoint.name}`
      }
    },
    resolve: {
      // This allows you to set a fallback for where webpack should look for modules.
      // We placed these paths second because we want `node_modules` to "win"
      // if there are any conflicts. This matches Node resolution mechanism.
      // https://github.com/facebook/create-react-app/issues/253
      modules: ["node_modules", paths.appNodeModules].concat(modules.additionalModulePaths || []),
      // These are the reasonable defaults supported by the Node ecosystem.
      // We also include JSX as a common component filename extension to support
      // some tools, although we do not recommend using it, see:
      // https://github.com/facebook/create-react-app/issues/290
      // `web` extension prefixes have been added for better support
      // for React Native Web.
      extensions: paths.moduleFileExtensions
        .map((ext) => `.${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$": "react-dom/profiling",
          "scheduler/tracing": "scheduler/tracing-profiling"
        }),
        ...(modules.webpackAliases || {}),
        "@": path.resolve(__dirname, "../src")
      },
      plugins: [
        // Adds support for installing with Plug'n'Play, leading to faster installs and adding
        // guards against forgotten dependencies and such.
        PnpWebpackPlugin,
        // Prevents users from importing files from outside of src/ (or node_modules/).
        // This often causes confusion because we only process files within src/ with babel.
        // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
        // please link the files into your node_modules/ and let module-resolution kick in.
        // Make sure your source files are compiled, as they will not be processed in any way.
        new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson, reactRefreshOverlayEntry])
      ]
    },
    resolveLoader: {
      plugins: [
        // Also related to Plug'n'Play, but this time it tells webpack to load its loaders
        // from the current package.
        PnpWebpackPlugin.moduleLoader(module)
      ]
    },
    module: {
      strictExportPresence: true,
      rules: [
        // Disable require.ensure as it's not a standard language feature.
        { parser: { requireEnsure: false } },
        {
          // "oneOf" will traverse all following loaders until one will
          // match the requirements. When no loader matches it will fall
          // back to the "file" loader at the end of the loader list.
          oneOf: [
            // TODO: Merge this config once `image/avif` is in the mime-db
            // https://github.com/jshttp/mime-db
            {
              test: [/\.avif$/],
              loader: require.resolve("url-loader"),
              options: {
                limit: imageInlineSizeLimit,
                mimetype: "image/avif",
                name: "static/media/[name].[hash:8].[ext]"
              }
            },
            // "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: imageInlineSizeLimit,
                name: "static/media/[name].[hash:8].[ext]"
              }
            },
            // Process application JS with Babel.
            // The preset includes JSX, Flow, TypeScript, and some ESnext features.
            {
              test: /\.(js|mjs|jsx|ts|tsx)$/,
              include: paths.appSrc,
              loader: require.resolve("babel-loader"),
              options: {
                customize: require.resolve("babel-preset-react-app/webpack-overrides"),
                presets: [
                  [
                    require.resolve("babel-preset-react-app"),
                    {
                      runtime: hasJsxRuntime ? "automatic" : "classic"
                    }
                  ]
                ],
                plugins: [
                  [
                    require.resolve("babel-plugin-named-asset-import"),
                    {
                      loaderMap: {
                        svg: {
                          ReactComponent: "@svgr/webpack?-svgo,+titleProp,+ref![path]"
                        }
                      }
                    }
                  ],
                  isEnvDevelopment &&
                    shouldUseReactRefresh &&
                    require.resolve("react-refresh/babel")
                ].filter(Boolean),
                // This is a feature of `babel-loader` for webpack (not Babel itself).
                // It enables caching results in ./node_modules/.cache/babel-loader/
                // directory for faster rebuilds.
                cacheDirectory: true,
                // See #6846 for context on why cacheCompression is disabled
                cacheCompression: false,
                compact: isEnvProduction
              }
            },
            // Process any JS outside of the app with Babel.
            // Unlike the application JS, we only compile the standard ES features.
            {
              test: /\.(js|mjs)$/,
              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
              }),
              // 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: {
                  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
                },
                "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: {
                    getLocalIdent: getCSSModuleLocalIdent
                  }
                },
                "sass-loader"
              )
            },
            {
              test: lessRegex,
              exclude: lessModuleRegex,
              use: getStyleLoaders(
                {
                  importLoaders: 3,
                  sourceMap: isEnvProduction && shouldUseSourceMap
                },
                "less-loader"
              ),
              sideEffects: true
            },

            {
              test: lessModuleRegex,
              use: getStyleLoaders(
                {
                  importLoaders: 3,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                  modules: {
                    getLocalIdent: getCSSModuleLocalIdent
                  }
                },
                "less-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.
            {
              loader: require.resolve("file-loader"),
              // 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$/],
              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(
        Object.assign(
          {},
          {
            inject: true,
            template: paths.appHtml
          },
          isEnvProduction
            ? {
                minify: {
                  removeComments: true,
                  collapseWhitespace: true,
                  removeRedundantAttributes: true,
                  useShortDoctype: true,
                  removeEmptyAttributes: true,
                  removeStyleLinkTypeAttributes: true,
                  keepClosingSlash: true,
                  minifyJS: true,
                  minifyCSS: true,
                  minifyURLs: true
                }
              }
            : undefined
        )
      ),
      // Inlines the webpack runtime script. This script is too small to warrant
      // a network request.
      // https://github.com/facebook/create-react-app/issues/5358
      isEnvProduction &&
        shouldInlineRuntimeChunk &&
        new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime-.+[.]js/]),
      // Makes some environment variables available in index.html.
      // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
      // <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
      // It will be an empty string unless you specify "homepage"
      // in `package.json`, in which case it will be the pathname of that URL.
      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 === '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),
      // This is necessary to emit hot updates (CSS and Fast Refresh):
      isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
      // Experimental hot reloading for React .
      // https://github.com/facebook/react/tree/master/packages/react-refresh
      isEnvDevelopment &&
        shouldUseReactRefresh &&
        new ReactRefreshWebpackPlugin({
          overlay: {
            entry: webpackDevClientEntry,
            // The expected exports are slightly different from what the overlay exports,
            // so an interop is included here to enable feedback on module-level errors.
            module: reactRefreshOverlayEntry,
            // Since we ship a custom dev client and overlay integration,
            // the bundled socket handling logic can be eliminated.
            sockIntegration: 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(),
      // 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
      isEnvDevelopment && new WatchMissingNodeModulesPlugin(paths.appNodeModules),
      isEnvProduction &&
        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 an asset manifest file with the following content:
      // - "files" key: Mapping of all asset filenames to their corresponding
      //   output file so that tools can pick it up without having to parse
      //   `index.html`
      // - "entrypoints" key: Array of files which are included in `index.html`,
      //   can be used to reconstruct the HTML if necessary
      new ManifestPlugin({
        fileName: "asset-manifest.json",
        publicPath: paths.publicUrlOrPath,
        generate: (seed, files, entrypoints) => {
          const manifestFiles = files.reduce((manifest, file) => {
            manifest[file.name] = file.path
            return manifest
          }, seed)
          const entrypointFiles = entrypoints.main.filter((fileName) => !fileName.endsWith(".map"))
          return {
            files: manifestFiles,
            entrypoints: entrypointFiles
          }
        }
      }),
      // 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$/),
      // Generate a service worker script that will precache, and keep up to date,
      // the HTML & assets that are part of the webpack build.
      isEnvProduction &&
        fs.existsSync(swSrc) &&
        new WorkboxWebpackPlugin.InjectManifest({
          swSrc,
          dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./,
          exclude: [/\.map$/, /asset-manifest\.json$/, /LICENSE/],
          // Bump up the default maximum size (2mb) that's precached,
          // to make lazy-loading failure scenarios less likely.
          // See https://github.com/cra-template/pwa/issues/13#issuecomment-722667270
          maximumFileSizeToCacheInBytes: 5 * 1024 * 1024
        }),
      // TypeScript type checking
      useTypeScript &&
        new ForkTsCheckerWebpackPlugin({
          typescript: resolve.sync("typescript", {
            basedir: paths.appNodeModules
          }),
          async: isEnvDevelopment,
          checkSyntacticErrors: true,
          resolveModuleNameModule: process.versions.pnp ? `${__dirname}/pnpTs.js` : undefined,
          resolveTypeReferenceDirectiveModule: process.versions.pnp
            ? `${__dirname}/pnpTs.js`
            : undefined,
          tsconfig: paths.appTsConfig,
          reportFiles: [
            // This one is specifically to match during CI tests,
            // as micromatch doesn't match
            // '../cra-template-typescript/template/src/App.tsx'
            // otherwise.
            "../**/src/**/*.{ts,tsx}",
            "**/src/**/*.{ts,tsx}",
            "!**/src/**/__tests__/**",
            "!**/src/**/?(*.)(spec|test).*",
            "!**/src/setupProxy.*",
            "!**/src/setupTests.*"
          ],
          silent: true,
          // The formatter is invoked directly in WebpackDevServerUtils during development
          formatter: isEnvProduction ? typescriptFormatter : undefined
        }),
      !disableESLintPlugin &&
        new ESLintPlugin({
          // Plugin options
          extensions: ["js", "mjs", "jsx", "ts", "tsx"],
          formatter: require.resolve("react-dev-utils/eslintFormatter"),
          eslintPath: require.resolve("eslint"),
          failOnError: !(isEnvDevelopment && emitErrorsAsWarnings),
          context: paths.appSrc,
          cache: true,
          cacheLocation: path.resolve(paths.appNodeModules, ".cache/.eslintcache"),
          // ESLint class options
          cwd: paths.appPath,
          resolvePluginsRelativeTo: __dirname,
          baseConfig: {
            extends: [require.resolve("eslint-config-react-app/base")],
            rules: {
              ...(!hasJsxRuntime && {
                "react/react-in-jsx-scope": "error"
              })
            }
          }
        })
    ].filter(Boolean),
    // 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: {
      module: "empty",
      dgram: "empty",
      dns: "mock",
      fs: "empty",
      http2: "empty",
      net: "empty",
      tls: "empty",
      child_process: "empty"
    },
    // Turn off performance processing because we utilize
    // our own hints via the FileSizeReporter
    performance: false
  }
}