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'use strict';

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 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 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';

// 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);

// style files regexes

const cssRegex = /\.css$/;

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

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

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

// 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');

// 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.

// In development, we always serve from the root. This makes config easier.

const publicPath = isEnvProduction

? paths.servedPath

: isEnvDevelopment && '/';

// Some apps do not use client-side routing with pushState.

// For these, "homepage" can be set to "." to enable relative asset paths.

const shouldUseRelativeAssetPaths = 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_URL%/xyz looks better than %PUBLIC_URL%xyz.

const publicUrl = isEnvProduction

? publicPath.slice(0, -1)

: isEnvDevelopment && '';

// Get environment variables to inject into our app.

const env = getClientEnvironment(publicUrl);

// common function to get style loaders

const getStyleLoaders = (cssOptions, preProcessor) => {

const loaders = [

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

isEnvProduction && {

loader: MiniCssExtractPlugin.loader,

options: shouldUseRelativeAssetPaths ? { 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: {

// 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,

].filter(Boolean);

if (preProcessor) {

loaders.push(

{

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

options: {

sourceMap: isEnvProduction && shouldUseSourceMap,

{

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: [

// 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'),

isEnvDevelopment &&

require.resolve('react-dev-utils/webpackHotDevClient'),

// 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.

].filter(Boolean),

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'

? 'static/js/bundle.min.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',

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

// We use "/" in development.

publicPath: publicPath,

// 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,

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,

}),

// 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',

// 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: {

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: [

// 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]),

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 } },

// First, run the linter.

// It's important to do this before Babel processes the JS.

{

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

enforce: 'pre',

use: [

{

options: {

cache: true,

formatter: require.resolve('react-dev-utils/eslintFormatter'),

eslintPath: require.resolve('eslint'),

resolvePluginsRelativeTo: __dirname,

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

include: paths.appSrc,

{

// "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: imageInlineSizeLimit,

// 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'

plugins: [

[

require.resolve('babel-plugin-named-asset-import'),

{

loaderMap: {

svg: {

ReactComponent:

'@svgr/webpack?-svgo,+titleProp,+ref![path]',

// 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)$/,

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,

use: getStyleLoaders({

importLoaders: 1,

sourceMap: isEnvProduction && shouldUseSourceMap,

}),

// 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,

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,

use: getStyleLoaders(

{

importLoaders: 2,

sourceMap: isEnvProduction && shouldUseSourceMap,

'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: 2,

sourceMap: isEnvProduction && shouldUseSourceMap,

modules: {

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.

{

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.

options: {

// ** 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,

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">

// In production, it will be an empty string unless you specify "homepage"

// in `package.json`, in which case it will be the pathname of that URL.

// 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 === '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 (currently CSS only):

isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),

// 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

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/main.min.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: publicPath,

generate: (seed, files, entrypoi

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'use strict';

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 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 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';
// 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);

// style files regexes
const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;

// 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');

// 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.
  // In development, we always serve from the root. This makes config easier.
  const publicPath = isEnvProduction
    ? paths.servedPath
    : isEnvDevelopment && '/';
  // Some apps do not use client-side routing with pushState.
  // For these, "homepage" can be set to "." to enable relative asset paths.
  const shouldUseRelativeAssetPaths = 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_URL%/xyz looks better than %PUBLIC_URL%xyz.
  const publicUrl = isEnvProduction
    ? publicPath.slice(0, -1)
    : isEnvDevelopment && '';
  // Get environment variables to inject into our app.
  const env = getClientEnvironment(publicUrl);

// common function to get style loaders
  const getStyleLoaders = (cssOptions, preProcessor) => {
    const loaders = [
      isEnvDevelopment && require.resolve('style-loader'),
      isEnvProduction && {
        loader: MiniCssExtractPlugin.loader,
        options: shouldUseRelativeAssetPaths ? { 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: {
          // 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,
        },
      },
    ].filter(Boolean);
    if (preProcessor) {
      loaders.push(
        {
          loader: require.resolve('resolve-url-loader'),
          options: {
            sourceMap: isEnvProduction && shouldUseSourceMap,
          },
        },
        {
          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: [
      // 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'),
      isEnvDevelopment &&
        require.resolve('react-dev-utils/webpackHotDevClient'),
      // 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.
    ].filter(Boolean),
    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',
      // We inferred the "public path" (such as / or /my-project) from homepage.
      // We use "/" in development.
      publicPath: publicPath,
      // 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,
            },
            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,
          },
        }),
      ],
      // 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: false,
      },
      // 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 || {}),
      },
      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]),
      ],
    },
    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 } },

// First, run the linter.
        // It's important to do this before Babel processes the JS.
        {
          test: /\.(js|mjs|jsx|ts|tsx)$/,
          enforce: 'pre',
          use: [
            {
              options: {
                cache: true,
                formatter: require.resolve('react-dev-utils/eslintFormatter'),
                eslintPath: require.resolve('eslint'),
                resolvePluginsRelativeTo: __dirname,
                
              },
              loader: require.resolve('eslint-loader'),
            },
          ],
          include: paths.appSrc,
        },
        {
          // "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: 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'
                ),
                
                plugins: [
                  [
                    require.resolve('babel-plugin-named-asset-import'),
                    {
                      loaderMap: {
                        svg: {
                          ReactComponent:
                            '@svgr/webpack?-svgo,+titleProp,+ref![path]',
                        },
                      },
                    },
                  ],
                ],
                // 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,
              }),
              // 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,
                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: 2,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                },
                '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: 2,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                  modules: {
                    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.
            {
              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">
      // In production, it will be an empty string unless you specify "homepage"
      // in `package.json`, in which case it will be the pathname of that URL.
      // 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 === '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 (currently CSS only):
      isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
      // 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: publicPath,
        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 &&
        new WorkboxWebpackPlugin.GenerateSW({
          clientsClaim: true,
          exclude: [/\.map$/, /asset-manifest\.json$/],
          importWorkboxFrom: 'cdn',
          navigateFallback: publicUrl + '/index.html',
          navigateFallbackBlacklist: [
            // Exclude URLs starting with /_, as they're likely an API call
            new RegExp('^/_'),
            // Exclude any URLs whose last part seems to be a file extension
            // as they're likely a resource and not a SPA route.
            // URLs containing a "?" character won't be blacklisted as they're likely
            // a route with query params (e.g. auth callbacks).
            new RegExp('/[^/?]+\\.[^/]+$'),
          ],
        }),
      // TypeScript type checking
      useTypeScript &&
        new ForkTsCheckerWebpackPlugin({
          typescript: resolve.sync('typescript', {
            basedir: paths.appNodeModules,
          }),
          async: isEnvDevelopment,
          useTypescriptIncrementalApi: true,
          checkSyntacticErrors: true,
          resolveModuleNameModule: process.versions.pnp
            ? `${__dirname}/pnpTs.js`
            : undefined,
          resolveTypeReferenceDirectiveModule: process.versions.pnp
            ? `${__dirname}/pnpTs.js`
            : undefined,
          tsconfig: paths.appTsConfig,
          reportFiles: [
            '**',
            '!**/__tests__/**',
            '!**/?(*.)(spec|test).*',
            '!**/src/setupProxy.*',
            '!**/src/setupTests.*',
          ],
          silent: true,
          // The formatter is invoked directly in WebpackDevServerUtils during development
          formatter: isEnvProduction ? typescriptFormatter : undefined,
        }),
    ].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,
  };
};

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Abrir arquivo

'use strict';

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 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 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 postcssNormalize = require('postcss-normalize');

const appPackageJson = require(paths.appPackageJson);

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

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

// style files regexes
const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;

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: [
      // 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'),
      isEnvDevelopment &&
        require.resolve('react-dev-utils/webpackHotDevClient'),
      // 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.
    ].filter(Boolean),
    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/bundle.min.js'
        : isEnvDevelopment && 'static/js/bundle.js',
      // TODO: remove this when upgrading to webpack 5
      futureEmitAssets: true,      
      // We inferred the "public path" (such as / or /my-project) from homepage.
      // We use "/" in development.
      publicPath: publicPath,
      // 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,
            },
            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,
          },
        }),
      ],
      
    },
    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: [
        // 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]),
      ],
    },
    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 } },

// First, run the linter.
        // It's important to do this before Babel processes the JS.
        {
          test: /\.(js|mjs|jsx|ts|tsx)$/,
          enforce: 'pre',
          use: [
            {
              options: {
                cache: true,
                formatter: require.resolve('react-dev-utils/eslintFormatter'),
                eslintPath: require.resolve('eslint'),
                resolvePluginsRelativeTo: __dirname,
                
              },
              loader: require.resolve('eslint-loader'),
            },
          ],
          include: paths.appSrc,
        },
        {
          // "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: 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'
                ),
                
                plugins: [
                  [
                    require.resolve('babel-plugin-named-asset-import'),
                    {
                      loaderMap: {
                        svg: {
                          ReactComponent:
                            '@svgr/webpack?-svgo,+titleProp,+ref![path]',
                        },
                      },
                    },
                  ],
                ],
                // 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,
              }),
              // 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,
                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: 2,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                },
                '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: 2,
                  sourceMap: isEnvProduction && shouldUseSourceMap,
                  modules: {
                    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.
            {
              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
        )
      ),
      
      // 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">
      // In production, it will be an empty string unless you specify "homepage"
      // in `package.json`, in which case it will be the pathname of that URL.
      // 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 === '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 (currently CSS only):
      isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),
      // 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/main.min.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: publicPath,
        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')
          );