├── .gitignore
├── README.md
├── config
    ├── env.js
    ├── jest
    │   ├── cssTransform.js
    │   └── fileTransform.js
    ├── paths.js
    ├── polyfills.js
    ├── webpack.config.dev.js
    ├── webpack.config.prod.js
    └── webpackDevServer.config.js
├── package.json
├── public
    ├── favicon.ico
    ├── index.html
    └── manifest.json
├── scripts
    ├── build.js
    ├── start.js
    └── test.js
├── src
    ├── App.css
    ├── App.js
    ├── Money.js
    ├── Money.test.js
    ├── MoneyRange.js
    ├── MoneyRange.test.js
    ├── currency-data.js
    ├── currency-data.test.js
    ├── format-currency.js
    ├── format-currency.test.js
    ├── index.css
    ├── index.js
    ├── logo.svg
    └── registerServiceWorker.js
└── yarn.lock


/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/ignore-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | 
 6 | # testing
 7 | /coverage
 8 | 
 9 | # production
10 | /build
11 | 
12 | # misc
13 | .DS_Store
14 | .env.local
15 | .env.development.local
16 | .env.test.local
17 | .env.production.local
18 | 
19 | npm-debug.log*
20 | yarn-debug.log*
21 | yarn-error.log*
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | This project was created for this blog post: http://javascriptplayground.com/blog/2017/06/refactoring-react-tests/
2 | 
3 | To install: `yarn`
4 | 
5 | To run: `yarn start`
6 | 
7 | To test: `yarn test`
8 | 


--------------------------------------------------------------------------------
/config/env.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const fs = require('fs');
 4 | const path = require('path');
 5 | const paths = require('./paths');
 6 | 
 7 | // Make sure that including paths.js after env.js will read .env variables.
 8 | delete require.cache[require.resolve('./paths')];
 9 | 
10 | const NODE_ENV = process.env.NODE_ENV;
11 | if (!NODE_ENV) {
12 |   throw new Error(
13 |     'The NODE_ENV environment variable is required but was not specified.'
14 |   );
15 | }
16 | 
17 | // https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use
18 | var dotenvFiles = [
19 |   `${paths.dotenv}.${NODE_ENV}.local`,
20 |   `${paths.dotenv}.${NODE_ENV}`,
21 |   // Don't include `.env.local` for `test` environment
22 |   // since normally you expect tests to produce the same
23 |   // results for everyone
24 |   NODE_ENV !== 'test' && `${paths.dotenv}.local`,
25 |   paths.dotenv,
26 | ].filter(Boolean);
27 | 
28 | // Load environment variables from .env* files. Suppress warnings using silent
29 | // if this file is missing. dotenv will never modify any environment variables
30 | // that have already been set.
31 | // https://github.com/motdotla/dotenv
32 | dotenvFiles.forEach(dotenvFile => {
33 |   if (fs.existsSync(dotenvFile)) {
34 |     require('dotenv').config({
35 |       path: dotenvFile,
36 |     });
37 |   }
38 | });
39 | 
40 | // We support resolving modules according to `NODE_PATH`.
41 | // This lets you use absolute paths in imports inside large monorepos:
42 | // https://github.com/facebookincubator/create-react-app/issues/253.
43 | // It works similar to `NODE_PATH` in Node itself:
44 | // https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders
45 | // Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.
46 | // Otherwise, we risk importing Node.js core modules into an app instead of Webpack shims.
47 | // https://github.com/facebookincubator/create-react-app/issues/1023#issuecomment-265344421
48 | // We also resolve them to make sure all tools using them work consistently.
49 | const appDirectory = fs.realpathSync(process.cwd());
50 | process.env.NODE_PATH = (process.env.NODE_PATH || '')
51 |   .split(path.delimiter)
52 |   .filter(folder => folder && !path.isAbsolute(folder))
53 |   .map(folder => path.resolve(appDirectory, folder))
54 |   .join(path.delimiter);
55 | 
56 | // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
57 | // injected into the application via DefinePlugin in Webpack configuration.
58 | const REACT_APP = /^REACT_APP_/i;
59 | 
60 | function getClientEnvironment(publicUrl) {
61 |   const raw = Object.keys(process.env)
62 |     .filter(key => REACT_APP.test(key))
63 |     .reduce(
64 |       (env, key) => {
65 |         env[key] = process.env[key];
66 |         return env;
67 |       },
68 |       {
69 |         // Useful for determining whether we’re running in production mode.
70 |         // Most importantly, it switches React into the correct mode.
71 |         NODE_ENV: process.env.NODE_ENV || 'development',
72 |         // Useful for resolving the correct path to static assets in `public`.
73 |         // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
74 |         // This should only be used as an escape hatch. Normally you would put
75 |         // images into the `src` and `import` them in code to get their paths.
76 |         PUBLIC_URL: publicUrl,
77 |       }
78 |     );
79 |   // Stringify all values so we can feed into Webpack DefinePlugin
80 |   const stringified = {
81 |     'process.env': Object.keys(raw).reduce((env, key) => {
82 |       env[key] = JSON.stringify(raw[key]);
83 |       return env;
84 |     }, {}),
85 |   };
86 | 
87 |   return { raw, stringified };
88 | }
89 | 
90 | module.exports = getClientEnvironment;
91 | 


--------------------------------------------------------------------------------
/config/jest/cssTransform.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | // This is a custom Jest transformer turning style imports into empty objects.
 4 | // http://facebook.github.io/jest/docs/tutorial-webpack.html
 5 | 
 6 | module.exports = {
 7 |   process() {
 8 |     return 'module.exports = {};';
 9 |   },
10 |   getCacheKey() {
11 |     // The output is always the same.
12 |     return 'cssTransform';
13 |   },
14 | };
15 | 


--------------------------------------------------------------------------------
/config/jest/fileTransform.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const path = require('path');
 4 | 
 5 | // This is a custom Jest transformer turning file imports into filenames.
 6 | // http://facebook.github.io/jest/docs/tutorial-webpack.html
 7 | 
 8 | module.exports = {
 9 |   process(src, filename) {
10 |     return `module.exports = ${JSON.stringify(path.basename(filename))};`;
11 |   },
12 | };
13 | 


--------------------------------------------------------------------------------
/config/paths.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const path = require('path');
 4 | const fs = require('fs');
 5 | const url = require('url');
 6 | 
 7 | // Make sure any symlinks in the project folder are resolved:
 8 | // https://github.com/facebookincubator/create-react-app/issues/637
 9 | const appDirectory = fs.realpathSync(process.cwd());
10 | const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
11 | 
12 | const envPublicUrl = process.env.PUBLIC_URL;
13 | 
14 | function ensureSlash(path, needsSlash) {
15 |   const hasSlash = path.endsWith('/');
16 |   if (hasSlash && !needsSlash) {
17 |     return path.substr(path, path.length - 1);
18 |   } else if (!hasSlash && needsSlash) {
19 |     return `${path}/`;
20 |   } else {
21 |     return path;
22 |   }
23 | }
24 | 
25 | const getPublicUrl = appPackageJson =>
26 |   envPublicUrl || require(appPackageJson).homepage;
27 | 
28 | // We use `PUBLIC_URL` environment variable or "homepage" field to infer
29 | // "public path" at which the app is served.
30 | // Webpack needs to know it to put the right <script> hrefs into HTML even in
31 | // single-page apps that may serve index.html for nested URLs like /todos/42.
32 | // We can't use a relative path in HTML because we don't want to load something
33 | // like /todos/42/static/js/bundle.7289d.js. We have to know the root.
34 | function getServedPath(appPackageJson) {
35 |   const publicUrl = getPublicUrl(appPackageJson);
36 |   const servedUrl =
37 |     envPublicUrl || (publicUrl ? url.parse(publicUrl).pathname : '/');
38 |   return ensureSlash(servedUrl, true);
39 | }
40 | 
41 | // config after eject: we're in ./config/
42 | module.exports = {
43 |   dotenv: resolveApp('.env'),
44 |   appBuild: resolveApp('build'),
45 |   appPublic: resolveApp('public'),
46 |   appHtml: resolveApp('public/index.html'),
47 |   appIndexJs: resolveApp('src/index.js'),
48 |   appPackageJson: resolveApp('package.json'),
49 |   appSrc: resolveApp('src'),
50 |   yarnLockFile: resolveApp('yarn.lock'),
51 |   testsSetup: resolveApp('src/setupTests.js'),
52 |   appNodeModules: resolveApp('node_modules'),
53 |   publicUrl: getPublicUrl(resolveApp('package.json')),
54 |   servedPath: getServedPath(resolveApp('package.json')),
55 | };
56 | 


--------------------------------------------------------------------------------
/config/polyfills.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | if (typeof Promise === 'undefined') {
 4 |   // Rejection tracking prevents a common issue where React gets into an
 5 |   // inconsistent state due to an error, but it gets swallowed by a Promise,
 6 |   // and the user has no idea what causes React's erratic future behavior.
 7 |   require('promise/lib/rejection-tracking').enable();
 8 |   window.Promise = require('promise/lib/es6-extensions.js');
 9 | }
10 | 
11 | // fetch() polyfill for making API calls.
12 | require('whatwg-fetch');
13 | 
14 | // Object.assign() is commonly used with React.
15 | // It will use the native implementation if it's present and isn't buggy.
16 | Object.assign = require('object-assign');
17 | 


--------------------------------------------------------------------------------
/config/webpack.config.dev.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const autoprefixer = require('autoprefixer');
  4 | const path = require('path');
  5 | const webpack = require('webpack');
  6 | const HtmlWebpackPlugin = require('html-webpack-plugin');
  7 | const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
  8 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
  9 | const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
 10 | const eslintFormatter = require('react-dev-utils/eslintFormatter');
 11 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 12 | const getClientEnvironment = require('./env');
 13 | const paths = require('./paths');
 14 | 
 15 | // Webpack uses `publicPath` to determine where the app is being served from.
 16 | // In development, we always serve from the root. This makes config easier.
 17 | const publicPath = '/';
 18 | // `publicUrl` is just like `publicPath`, but we will provide it to our app
 19 | // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
 20 | // Omit trailing slash as %PUBLIC_PATH%/xyz looks better than %PUBLIC_PATH%xyz.
 21 | const publicUrl = '';
 22 | // Get environment variables to inject into our app.
 23 | const env = getClientEnvironment(publicUrl);
 24 | 
 25 | // This is the development configuration.
 26 | // It is focused on developer experience and fast rebuilds.
 27 | // The production configuration is different and lives in a separate file.
 28 | module.exports = {
 29 |   // You may want 'eval' instead if you prefer to see the compiled output in DevTools.
 30 |   // See the discussion in https://github.com/facebookincubator/create-react-app/issues/343.
 31 |   devtool: 'cheap-module-source-map',
 32 |   // These are the "entry points" to our application.
 33 |   // This means they will be the "root" imports that are included in JS bundle.
 34 |   // The first two entry points enable "hot" CSS and auto-refreshes for JS.
 35 |   entry: [
 36 |     // Include an alternative client for WebpackDevServer. A client's job is to
 37 |     // connect to WebpackDevServer by a socket and get notified about changes.
 38 |     // When you save a file, the client will either apply hot updates (in case
 39 |     // of CSS changes), or refresh the page (in case of JS changes). When you
 40 |     // make a syntax error, this client will display a syntax error overlay.
 41 |     // Note: instead of the default WebpackDevServer client, we use a custom one
 42 |     // to bring better experience for Create React App users. You can replace
 43 |     // the line below with these two lines if you prefer the stock client:
 44 |     // require.resolve('webpack-dev-server/client') + '?/',
 45 |     // require.resolve('webpack/hot/dev-server'),
 46 |     require.resolve('react-dev-utils/webpackHotDevClient'),
 47 |     // We ship a few polyfills by default:
 48 |     require.resolve('./polyfills'),
 49 |     // Errors should be considered fatal in development
 50 |     require.resolve('react-error-overlay'),
 51 |     // Finally, this is your app's code:
 52 |     paths.appIndexJs,
 53 |     // We include the app code last so that if there is a runtime error during
 54 |     // initialization, it doesn't blow up the WebpackDevServer client, and
 55 |     // changing JS code would still trigger a refresh.
 56 |   ],
 57 |   output: {
 58 |     // Next line is not used in dev but WebpackDevServer crashes without it:
 59 |     path: paths.appBuild,
 60 |     // Add /* filename */ comments to generated require()s in the output.
 61 |     pathinfo: true,
 62 |     // This does not produce a real file. It's just the virtual path that is
 63 |     // served by WebpackDevServer in development. This is the JS bundle
 64 |     // containing code from all our entry points, and the Webpack runtime.
 65 |     filename: 'static/js/bundle.js',
 66 |     // There are also additional JS chunk files if you use code splitting.
 67 |     chunkFilename: 'static/js/[name].chunk.js',
 68 |     // This is the URL that app is served from. We use "/" in development.
 69 |     publicPath: publicPath,
 70 |     // Point sourcemap entries to original disk location (format as URL on Windows)
 71 |     devtoolModuleFilenameTemplate: info =>
 72 |       path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
 73 |   },
 74 |   resolve: {
 75 |     // This allows you to set a fallback for where Webpack should look for modules.
 76 |     // We placed these paths second because we want `node_modules` to "win"
 77 |     // if there are any conflicts. This matches Node resolution mechanism.
 78 |     // https://github.com/facebookincubator/create-react-app/issues/253
 79 |     modules: ['node_modules', paths.appNodeModules].concat(
 80 |       // It is guaranteed to exist because we tweak it in `env.js`
 81 |       process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
 82 |     ),
 83 |     // These are the reasonable defaults supported by the Node ecosystem.
 84 |     // We also include JSX as a common component filename extension to support
 85 |     // some tools, although we do not recommend using it, see:
 86 |     // https://github.com/facebookincubator/create-react-app/issues/290
 87 |     // `web` extension prefixes have been added for better support
 88 |     // for React Native Web.
 89 |     extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
 90 |     alias: {
 91 |       
 92 |       // Support React Native Web
 93 |       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
 94 |       'react-native': 'react-native-web',
 95 |     },
 96 |     plugins: [
 97 |       // Prevents users from importing files from outside of src/ (or node_modules/).
 98 |       // This often causes confusion because we only process files within src/ with babel.
 99 |       // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
100 |       // please link the files into your node_modules/ and let module-resolution kick in.
101 |       // Make sure your source files are compiled, as they will not be processed in any way.
102 |       new ModuleScopePlugin(paths.appSrc),
103 |     ],
104 |   },
105 |   module: {
106 |     strictExportPresence: true,
107 |     rules: [
108 |       // TODO: Disable require.ensure as it's not a standard language feature.
109 |       // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
110 |       // { parser: { requireEnsure: false } },
111 | 
112 |       // First, run the linter.
113 |       // It's important to do this before Babel processes the JS.
114 |       {
115 |         test: /\.(js|jsx)$/,
116 |         enforce: 'pre',
117 |         use: [
118 |           {
119 |             options: {
120 |               formatter: eslintFormatter,
121 |               
122 |             },
123 |             loader: require.resolve('eslint-loader'),
124 |           },
125 |         ],
126 |         include: paths.appSrc,
127 |       },
128 |       // ** ADDING/UPDATING LOADERS **
129 |       // The "file" loader handles all assets unless explicitly excluded.
130 |       // The `exclude` list *must* be updated with every change to loader extensions.
131 |       // When adding a new loader, you must add its `test`
132 |       // as a new entry in the `exclude` list for "file" loader.
133 | 
134 |       // "file" loader makes sure those assets get served by WebpackDevServer.
135 |       // When you `import` an asset, you get its (virtual) filename.
136 |       // In production, they would get copied to the `build` folder.
137 |       {
138 |         exclude: [
139 |           /\.html$/,
140 |           /\.(js|jsx)$/,
141 |           /\.css$/,
142 |           /\.json$/,
143 |           /\.bmp$/,
144 |           /\.gif$/,
145 |           /\.jpe?g$/,
146 |           /\.png$/,
147 |         ],
148 |         loader: require.resolve('file-loader'),
149 |         options: {
150 |           name: 'static/media/[name].[hash:8].[ext]',
151 |         },
152 |       },
153 |       // "url" loader works like "file" loader except that it embeds assets
154 |       // smaller than specified limit in bytes as data URLs to avoid requests.
155 |       // A missing `test` is equivalent to a match.
156 |       {
157 |         test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
158 |         loader: require.resolve('url-loader'),
159 |         options: {
160 |           limit: 10000,
161 |           name: 'static/media/[name].[hash:8].[ext]',
162 |         },
163 |       },
164 |       // Process JS with Babel.
165 |       {
166 |         test: /\.(js|jsx)$/,
167 |         include: paths.appSrc,
168 |         loader: require.resolve('babel-loader'),
169 |         options: {
170 |           
171 |           // This is a feature of `babel-loader` for webpack (not Babel itself).
172 |           // It enables caching results in ./node_modules/.cache/babel-loader/
173 |           // directory for faster rebuilds.
174 |           cacheDirectory: true,
175 |         },
176 |       },
177 |       // "postcss" loader applies autoprefixer to our CSS.
178 |       // "css" loader resolves paths in CSS and adds assets as dependencies.
179 |       // "style" loader turns CSS into JS modules that inject <style> tags.
180 |       // In production, we use a plugin to extract that CSS to a file, but
181 |       // in development "style" loader enables hot editing of CSS.
182 |       {
183 |         test: /\.css$/,
184 |         use: [
185 |           require.resolve('style-loader'),
186 |           {
187 |             loader: require.resolve('css-loader'),
188 |             options: {
189 |               importLoaders: 1,
190 |             },
191 |           },
192 |           {
193 |             loader: require.resolve('postcss-loader'),
194 |             options: {
195 |               plugins: () => [
196 |                 require('postcss-flexbugs-fixes'),
197 |                 autoprefixer({
198 |                   browsers: [
199 |                     '>1%',
200 |                     'last 4 versions',
201 |                     'Firefox ESR',
202 |                     'not ie < 9', // React doesn't support IE8 anyway
203 |                   ],
204 |                   flexbox: 'no-2009',
205 |                 }),
206 |               ],
207 |             },
208 |           },
209 |         ],
210 |       },
211 |       // ** STOP ** Are you adding a new loader?
212 |       // Remember to add the new extension(s) to the "file" loader exclusion list.
213 |     ],
214 |   },
215 |   plugins: [
216 |     // Makes some environment variables available in index.html.
217 |     // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
218 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
219 |     // In development, this will be an empty string.
220 |     new InterpolateHtmlPlugin(env.raw),
221 |     // Generates an `index.html` file with the <script> injected.
222 |     new HtmlWebpackPlugin({
223 |       inject: true,
224 |       template: paths.appHtml,
225 |     }),
226 |     // Add module names to factory functions so they appear in browser profiler.
227 |     new webpack.NamedModulesPlugin(),
228 |     // Makes some environment variables available to the JS code, for example:
229 |     // if (process.env.NODE_ENV === 'development') { ... }. See `./env.js`.
230 |     new webpack.DefinePlugin(env.stringified),
231 |     // This is necessary to emit hot updates (currently CSS only):
232 |     new webpack.HotModuleReplacementPlugin(),
233 |     // Watcher doesn't work well if you mistype casing in a path so we use
234 |     // a plugin that prints an error when you attempt to do this.
235 |     // See https://github.com/facebookincubator/create-react-app/issues/240
236 |     new CaseSensitivePathsPlugin(),
237 |     // If you require a missing module and then `npm install` it, you still have
238 |     // to restart the development server for Webpack to discover it. This plugin
239 |     // makes the discovery automatic so you don't have to restart.
240 |     // See https://github.com/facebookincubator/create-react-app/issues/186
241 |     new WatchMissingNodeModulesPlugin(paths.appNodeModules),
242 |     // Moment.js is an extremely popular library that bundles large locale files
243 |     // by default due to how Webpack interprets its code. This is a practical
244 |     // solution that requires the user to opt into importing specific locales.
245 |     // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
246 |     // You can remove this if you don't use Moment.js:
247 |     new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
248 |   ],
249 |   // Some libraries import Node modules but don't use them in the browser.
250 |   // Tell Webpack to provide empty mocks for them so importing them works.
251 |   node: {
252 |     dgram: 'empty',
253 |     fs: 'empty',
254 |     net: 'empty',
255 |     tls: 'empty',
256 |   },
257 |   // Turn off performance hints during development because we don't do any
258 |   // splitting or minification in interest of speed. These warnings become
259 |   // cumbersome.
260 |   performance: {
261 |     hints: false,
262 |   },
263 | };
264 | 


--------------------------------------------------------------------------------
/config/webpack.config.prod.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | const autoprefixer = require('autoprefixer');
  4 | const path = require('path');
  5 | const webpack = require('webpack');
  6 | const HtmlWebpackPlugin = require('html-webpack-plugin');
  7 | const ExtractTextPlugin = require('extract-text-webpack-plugin');
  8 | const ManifestPlugin = require('webpack-manifest-plugin');
  9 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
 10 | const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
 11 | const eslintFormatter = require('react-dev-utils/eslintFormatter');
 12 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
 13 | const paths = require('./paths');
 14 | const getClientEnvironment = require('./env');
 15 | 
 16 | // Webpack uses `publicPath` to determine where the app is being served from.
 17 | // It requires a trailing slash, or the file assets will get an incorrect path.
 18 | const publicPath = paths.servedPath;
 19 | // Some apps do not use client-side routing with pushState.
 20 | // For these, "homepage" can be set to "." to enable relative asset paths.
 21 | const shouldUseRelativeAssetPaths = publicPath === './';
 22 | // `publicUrl` is just like `publicPath`, but we will provide it to our app
 23 | // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
 24 | // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
 25 | const publicUrl = publicPath.slice(0, -1);
 26 | // Get environment variables to inject into our app.
 27 | const env = getClientEnvironment(publicUrl);
 28 | 
 29 | // Assert this just to be safe.
 30 | // Development builds of React are slow and not intended for production.
 31 | if (env.stringified['process.env'].NODE_ENV !== '"production"') {
 32 |   throw new Error('Production builds must have NODE_ENV=production.');
 33 | }
 34 | 
 35 | // Note: defined here because it will be used more than once.
 36 | const cssFilename = 'static/css/[name].[contenthash:8].css';
 37 | 
 38 | // ExtractTextPlugin expects the build output to be flat.
 39 | // (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27)
 40 | // However, our output is structured with css, js and media folders.
 41 | // To have this structure working with relative paths, we have to use custom options.
 42 | const extractTextPluginOptions = shouldUseRelativeAssetPaths
 43 |   ? // Making sure that the publicPath goes back to to build folder.
 44 |     { publicPath: Array(cssFilename.split('/').length).join('../') }
 45 |   : {};
 46 | 
 47 | // This is the production configuration.
 48 | // It compiles slowly and is focused on producing a fast and minimal bundle.
 49 | // The development configuration is different and lives in a separate file.
 50 | module.exports = {
 51 |   // Don't attempt to continue if there are any errors.
 52 |   bail: true,
 53 |   // We generate sourcemaps in production. This is slow but gives good results.
 54 |   // You can exclude the *.map files from the build during deployment.
 55 |   devtool: 'source-map',
 56 |   // In production, we only want to load the polyfills and the app code.
 57 |   entry: [require.resolve('./polyfills'), paths.appIndexJs],
 58 |   output: {
 59 |     // The build folder.
 60 |     path: paths.appBuild,
 61 |     // Generated JS file names (with nested folders).
 62 |     // There will be one main bundle, and one file per asynchronous chunk.
 63 |     // We don't currently advertise code splitting but Webpack supports it.
 64 |     filename: 'static/js/[name].[chunkhash:8].js',
 65 |     chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
 66 |     // We inferred the "public path" (such as / or /my-project) from homepage.
 67 |     publicPath: publicPath,
 68 |     // Point sourcemap entries to original disk location (format as URL on Windows)
 69 |     devtoolModuleFilenameTemplate: info =>
 70 |       path
 71 |         .relative(paths.appSrc, info.absoluteResourcePath)
 72 |         .replace(/\\/g, '/'),
 73 |   },
 74 |   resolve: {
 75 |     // This allows you to set a fallback for where Webpack should look for modules.
 76 |     // We placed these paths second because we want `node_modules` to "win"
 77 |     // if there are any conflicts. This matches Node resolution mechanism.
 78 |     // https://github.com/facebookincubator/create-react-app/issues/253
 79 |     modules: ['node_modules', paths.appNodeModules].concat(
 80 |       // It is guaranteed to exist because we tweak it in `env.js`
 81 |       process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
 82 |     ),
 83 |     // These are the reasonable defaults supported by the Node ecosystem.
 84 |     // We also include JSX as a common component filename extension to support
 85 |     // some tools, although we do not recommend using it, see:
 86 |     // https://github.com/facebookincubator/create-react-app/issues/290
 87 |     // `web` extension prefixes have been added for better support
 88 |     // for React Native Web.
 89 |     extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
 90 |     alias: {
 91 |       
 92 |       // Support React Native Web
 93 |       // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
 94 |       'react-native': 'react-native-web',
 95 |     },
 96 |     plugins: [
 97 |       // Prevents users from importing files from outside of src/ (or node_modules/).
 98 |       // This often causes confusion because we only process files within src/ with babel.
 99 |       // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
100 |       // please link the files into your node_modules/ and let module-resolution kick in.
101 |       // Make sure your source files are compiled, as they will not be processed in any way.
102 |       new ModuleScopePlugin(paths.appSrc),
103 |     ],
104 |   },
105 |   module: {
106 |     strictExportPresence: true,
107 |     rules: [
108 |       // TODO: Disable require.ensure as it's not a standard language feature.
109 |       // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
110 |       // { parser: { requireEnsure: false } },
111 | 
112 |       // First, run the linter.
113 |       // It's important to do this before Babel processes the JS.
114 |       {
115 |         test: /\.(js|jsx)$/,
116 |         enforce: 'pre',
117 |         use: [
118 |           {
119 |             options: {
120 |               formatter: eslintFormatter,
121 |               
122 |             },
123 |             loader: require.resolve('eslint-loader'),
124 |           },
125 |         ],
126 |         include: paths.appSrc,
127 |       },
128 |       // ** ADDING/UPDATING LOADERS **
129 |       // The "file" loader handles all assets unless explicitly excluded.
130 |       // The `exclude` list *must* be updated with every change to loader extensions.
131 |       // When adding a new loader, you must add its `test`
132 |       // as a new entry in the `exclude` list in the "file" loader.
133 | 
134 |       // "file" loader makes sure those assets end up in the `build` folder.
135 |       // When you `import` an asset, you get its filename.
136 |       {
137 |         exclude: [
138 |           /\.html$/,
139 |           /\.(js|jsx)$/,
140 |           /\.css$/,
141 |           /\.json$/,
142 |           /\.bmp$/,
143 |           /\.gif$/,
144 |           /\.jpe?g$/,
145 |           /\.png$/,
146 |         ],
147 |         loader: require.resolve('file-loader'),
148 |         options: {
149 |           name: 'static/media/[name].[hash:8].[ext]',
150 |         },
151 |       },
152 |       // "url" loader works just like "file" loader but it also embeds
153 |       // assets smaller than specified size as data URLs to avoid requests.
154 |       {
155 |         test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
156 |         loader: require.resolve('url-loader'),
157 |         options: {
158 |           limit: 10000,
159 |           name: 'static/media/[name].[hash:8].[ext]',
160 |         },
161 |       },
162 |       // Process JS with Babel.
163 |       {
164 |         test: /\.(js|jsx)$/,
165 |         include: paths.appSrc,
166 |         loader: require.resolve('babel-loader'),
167 |         options: {
168 |           
169 |           compact: true,
170 |         },
171 |       },
172 |       // The notation here is somewhat confusing.
173 |       // "postcss" loader applies autoprefixer to our CSS.
174 |       // "css" loader resolves paths in CSS and adds assets as dependencies.
175 |       // "style" loader normally turns CSS into JS modules injecting <style>,
176 |       // but unlike in development configuration, we do something different.
177 |       // `ExtractTextPlugin` first applies the "postcss" and "css" loaders
178 |       // (second argument), then grabs the result CSS and puts it into a
179 |       // separate file in our build process. This way we actually ship
180 |       // a single CSS file in production instead of JS code injecting <style>
181 |       // tags. If you use code splitting, however, any async bundles will still
182 |       // use the "style" loader inside the async code so CSS from them won't be
183 |       // in the main CSS file.
184 |       {
185 |         test: /\.css$/,
186 |         loader: ExtractTextPlugin.extract(
187 |           Object.assign(
188 |             {
189 |               fallback: require.resolve('style-loader'),
190 |               use: [
191 |                 {
192 |                   loader: require.resolve('css-loader'),
193 |                   options: {
194 |                     importLoaders: 1,
195 |                     minimize: true,
196 |                     sourceMap: true,
197 |                   },
198 |                 },
199 |                 {
200 |                   loader: require.resolve('postcss-loader'),
201 |                   options: {
202 |                     plugins: () => [
203 |                       require('postcss-flexbugs-fixes'),
204 |                       autoprefixer({
205 |                         browsers: [
206 |                           '>1%',
207 |                           'last 4 versions',
208 |                           'Firefox ESR',
209 |                           'not ie < 9', // React doesn't support IE8 anyway
210 |                         ],
211 |                         flexbox: 'no-2009',
212 |                       }),
213 |                     ],
214 |                   },
215 |                 },
216 |               ],
217 |             },
218 |             extractTextPluginOptions
219 |           )
220 |         ),
221 |         // Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
222 |       },
223 |       // ** STOP ** Are you adding a new loader?
224 |       // Remember to add the new extension(s) to the "file" loader exclusion list.
225 |     ],
226 |   },
227 |   plugins: [
228 |     // Makes some environment variables available in index.html.
229 |     // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
230 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
231 |     // In production, it will be an empty string unless you specify "homepage"
232 |     // in `package.json`, in which case it will be the pathname of that URL.
233 |     new InterpolateHtmlPlugin(env.raw),
234 |     // Generates an `index.html` file with the <script> injected.
235 |     new HtmlWebpackPlugin({
236 |       inject: true,
237 |       template: paths.appHtml,
238 |       minify: {
239 |         removeComments: true,
240 |         collapseWhitespace: true,
241 |         removeRedundantAttributes: true,
242 |         useShortDoctype: true,
243 |         removeEmptyAttributes: true,
244 |         removeStyleLinkTypeAttributes: true,
245 |         keepClosingSlash: true,
246 |         minifyJS: true,
247 |         minifyCSS: true,
248 |         minifyURLs: true,
249 |       },
250 |     }),
251 |     // Makes some environment variables available to the JS code, for example:
252 |     // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
253 |     // It is absolutely essential that NODE_ENV was set to production here.
254 |     // Otherwise React will be compiled in the very slow development mode.
255 |     new webpack.DefinePlugin(env.stringified),
256 |     // Minify the code.
257 |     new webpack.optimize.UglifyJsPlugin({
258 |       compress: {
259 |         warnings: false,
260 |         // Disabled because of an issue with Uglify breaking seemingly valid code:
261 |         // https://github.com/facebookincubator/create-react-app/issues/2376
262 |         // Pending further investigation:
263 |         // https://github.com/mishoo/UglifyJS2/issues/2011
264 |         comparisons: false,
265 |       },
266 |       output: {
267 |         comments: false,
268 |         // Turned on because emoji and regex is not minified properly using default
269 |         // https://github.com/facebookincubator/create-react-app/issues/2488
270 |         ascii_only: true,
271 |       },
272 |       sourceMap: true,
273 |     }),
274 |     // Note: this won't work without ExtractTextPlugin.extract(..) in `loaders`.
275 |     new ExtractTextPlugin({
276 |       filename: cssFilename,
277 |     }),
278 |     // Generate a manifest file which contains a mapping of all asset filenames
279 |     // to their corresponding output file so that tools can pick it up without
280 |     // having to parse `index.html`.
281 |     new ManifestPlugin({
282 |       fileName: 'asset-manifest.json',
283 |     }),
284 |     // Generate a service worker script that will precache, and keep up to date,
285 |     // the HTML & assets that are part of the Webpack build.
286 |     new SWPrecacheWebpackPlugin({
287 |       // By default, a cache-busting query parameter is appended to requests
288 |       // used to populate the caches, to ensure the responses are fresh.
289 |       // If a URL is already hashed by Webpack, then there is no concern
290 |       // about it being stale, and the cache-busting can be skipped.
291 |       dontCacheBustUrlsMatching: /\.\w{8}\./,
292 |       filename: 'service-worker.js',
293 |       logger(message) {
294 |         if (message.indexOf('Total precache size is') === 0) {
295 |           // This message occurs for every build and is a bit too noisy.
296 |           return;
297 |         }
298 |         if (message.indexOf('Skipping static resource') === 0) {
299 |           // This message obscures real errors so we ignore it.
300 |           // https://github.com/facebookincubator/create-react-app/issues/2612
301 |           return;
302 |         }
303 |         console.log(message);
304 |       },
305 |       minify: true,
306 |       // For unknown URLs, fallback to the index page
307 |       navigateFallback: publicUrl + '/index.html',
308 |       // Ignores URLs starting from /__ (useful for Firebase):
309 |       // https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
310 |       navigateFallbackWhitelist: [/^(?!\/__).*/],
311 |       // Don't precache sourcemaps (they're large) and build asset manifest:
312 |       staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
313 |     }),
314 |     // Moment.js is an extremely popular library that bundles large locale files
315 |     // by default due to how Webpack interprets its code. This is a practical
316 |     // solution that requires the user to opt into importing specific locales.
317 |     // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
318 |     // You can remove this if you don't use Moment.js:
319 |     new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
320 |   ],
321 |   // Some libraries import Node modules but don't use them in the browser.
322 |   // Tell Webpack to provide empty mocks for them so importing them works.
323 |   node: {
324 |     dgram: 'empty',
325 |     fs: 'empty',
326 |     net: 'empty',
327 |     tls: 'empty',
328 |   },
329 | };
330 | 


--------------------------------------------------------------------------------
/config/webpackDevServer.config.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | const errorOverlayMiddleware = require('react-error-overlay/middleware');
 4 | const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
 5 | const config = require('./webpack.config.dev');
 6 | const paths = require('./paths');
 7 | 
 8 | const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
 9 | const host = process.env.HOST || '0.0.0.0';
10 | 
11 | module.exports = function(proxy, allowedHost) {
12 |   return {
13 |     // WebpackDevServer 2.4.3 introduced a security fix that prevents remote
14 |     // websites from potentially accessing local content through DNS rebinding:
15 |     // https://github.com/webpack/webpack-dev-server/issues/887
16 |     // https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a
17 |     // However, it made several existing use cases such as development in cloud
18 |     // environment or subdomains in development significantly more complicated:
19 |     // https://github.com/facebookincubator/create-react-app/issues/2271
20 |     // https://github.com/facebookincubator/create-react-app/issues/2233
21 |     // While we're investigating better solutions, for now we will take a
22 |     // compromise. Since our WDS configuration only serves files in the `public`
23 |     // folder we won't consider accessing them a vulnerability. However, if you
24 |     // use the `proxy` feature, it gets more dangerous because it can expose
25 |     // remote code execution vulnerabilities in backends like Django and Rails.
26 |     // So we will disable the host check normally, but enable it if you have
27 |     // specified the `proxy` setting. Finally, we let you override it if you
28 |     // really know what you're doing with a special environment variable.
29 |     disableHostCheck:
30 |       !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === 'true',
31 |     // Enable gzip compression of generated files.
32 |     compress: true,
33 |     // Silence WebpackDevServer's own logs since they're generally not useful.
34 |     // It will still show compile warnings and errors with this setting.
35 |     clientLogLevel: 'none',
36 |     // By default WebpackDevServer serves physical files from current directory
37 |     // in addition to all the virtual build products that it serves from memory.
38 |     // This is confusing because those files won’t automatically be available in
39 |     // production build folder unless we copy them. However, copying the whole
40 |     // project directory is dangerous because we may expose sensitive files.
41 |     // Instead, we establish a convention that only files in `public` directory
42 |     // get served. Our build script will copy `public` into the `build` folder.
43 |     // In `index.html`, you can get URL of `public` folder with %PUBLIC_URL%:
44 |     // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
45 |     // In JavaScript code, you can access it with `process.env.PUBLIC_URL`.
46 |     // Note that we only recommend to use `public` folder as an escape hatch
47 |     // for files like `favicon.ico`, `manifest.json`, and libraries that are
48 |     // for some reason broken when imported through Webpack. If you just want to
49 |     // use an image, put it in `src` and `import` it from JavaScript instead.
50 |     contentBase: paths.appPublic,
51 |     // By default files from `contentBase` will not trigger a page reload.
52 |     watchContentBase: true,
53 |     // Enable hot reloading server. It will provide /sockjs-node/ endpoint
54 |     // for the WebpackDevServer client so it can learn when the files were
55 |     // updated. The WebpackDevServer client is included as an entry point
56 |     // in the Webpack development configuration. Note that only changes
57 |     // to CSS are currently hot reloaded. JS changes will refresh the browser.
58 |     hot: true,
59 |     // It is important to tell WebpackDevServer to use the same "root" path
60 |     // as we specified in the config. In development, we always serve from /.
61 |     publicPath: config.output.publicPath,
62 |     // WebpackDevServer is noisy by default so we emit custom message instead
63 |     // by listening to the compiler events with `compiler.plugin` calls above.
64 |     quiet: true,
65 |     // Reportedly, this avoids CPU overload on some systems.
66 |     // https://github.com/facebookincubator/create-react-app/issues/293
67 |     watchOptions: {
68 |       ignored: /node_modules/,
69 |     },
70 |     // Enable HTTPS if the HTTPS environment variable is set to 'true'
71 |     https: protocol === 'https',
72 |     host: host,
73 |     overlay: false,
74 |     historyApiFallback: {
75 |       // Paths with dots should still use the history fallback.
76 |       // See https://github.com/facebookincubator/create-react-app/issues/387.
77 |       disableDotRule: true,
78 |     },
79 |     public: allowedHost,
80 |     proxy,
81 |     setup(app) {
82 |       // This lets us open files from the runtime error overlay.
83 |       app.use(errorOverlayMiddleware());
84 |       // This service worker file is effectively a 'no-op' that will reset any
85 |       // previous service worker registered for the same host:port combination.
86 |       // We do this in development to avoid hitting the production cache if
87 |       // it used the same host and port.
88 |       // https://github.com/facebookincubator/create-react-app/issues/2272#issuecomment-302832432
89 |       app.use(noopServiceWorkerMiddleware());
90 |     },
91 |   };
92 | };
93 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "refactoring-with-tests",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "autoprefixer": "7.1.1",
 7 |     "babel-core": "6.25.0",
 8 |     "babel-eslint": "7.2.3",
 9 |     "babel-jest": "20.0.3",
10 |     "babel-loader": "7.0.0",
11 |     "babel-preset-react-app": "^3.0.1",
12 |     "babel-runtime": "6.23.0",
13 |     "case-sensitive-paths-webpack-plugin": "2.1.1",
14 |     "chalk": "1.1.3",
15 |     "css-loader": "0.28.4",
16 |     "dotenv": "4.0.0",
17 |     "eslint": "3.19.0",
18 |     "eslint-config-react-app": "^1.0.5",
19 |     "eslint-loader": "1.7.1",
20 |     "eslint-plugin-flowtype": "2.34.0",
21 |     "eslint-plugin-import": "2.2.0",
22 |     "eslint-plugin-jsx-a11y": "5.0.3",
23 |     "eslint-plugin-react": "7.1.0",
24 |     "extract-text-webpack-plugin": "2.1.2",
25 |     "file-loader": "0.11.2",
26 |     "fs-extra": "3.0.1",
27 |     "html-webpack-plugin": "2.29.0",
28 |     "jest": "20.0.4",
29 |     "object-assign": "4.1.1",
30 |     "postcss-flexbugs-fixes": "3.0.0",
31 |     "postcss-loader": "2.0.6",
32 |     "promise": "7.1.1",
33 |     "react": "^15.6.1",
34 |     "react-dev-utils": "^3.0.1",
35 |     "react-dom": "^15.6.1",
36 |     "react-error-overlay": "^1.0.8",
37 |     "style-loader": "0.18.2",
38 |     "sw-precache-webpack-plugin": "0.11.3",
39 |     "url-loader": "0.5.9",
40 |     "webpack": "2.6.1",
41 |     "webpack-dev-server": "2.5.0",
42 |     "webpack-manifest-plugin": "1.1.0",
43 |     "whatwg-fetch": "2.0.3"
44 |   },
45 |   "scripts": {
46 |     "start": "node scripts/start.js",
47 |     "build": "node scripts/build.js",
48 |     "test": "node scripts/test.js --env=jsdom"
49 |   },
50 |   "jest": {
51 |     "collectCoverageFrom": [
52 |       "src/**/*.{js,jsx}"
53 |     ],
54 |     "setupFiles": [
55 |       "<rootDir>/config/polyfills.js"
56 |     ],
57 |     "testMatch": [
58 |       "<rootDir>/src/**/__tests__/**/*.js?(x)",
59 |       "<rootDir>/src/**/?(*.)(spec|test).js?(x)"
60 |     ],
61 |     "testEnvironment": "node",
62 |     "testURL": "http://localhost",
63 |     "transform": {
64 |       "^.+\\.(js|jsx)$": "<rootDir>/node_modules/babel-jest",
65 |       "^.+\\.css$": "<rootDir>/config/jest/cssTransform.js",
66 |       "^(?!.*\\.(js|jsx|css|json)$)": "<rootDir>/config/jest/fileTransform.js"
67 |     },
68 |     "transformIgnorePatterns": [
69 |       "[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$"
70 |     ],
71 |     "moduleNameMapper": {
72 |       "^react-native$": "react-native-web"
73 |     },
74 |     "moduleFileExtensions": [
75 |       "web.js",
76 |       "js",
77 |       "json",
78 |       "web.jsx",
79 |       "jsx"
80 |     ]
81 |   },
82 |   "babel": {
83 |     "presets": [
84 |       "react-app"
85 |     ]
86 |   },
87 |   "eslintConfig": {
88 |     "extends": "react-app"
89 |   },
90 |   "devDependencies": {
91 |     "enzyme": "^2.9.1",
92 |     "react-test-renderer": "^15.6.1"
93 |   }
94 | }
95 | 


--------------------------------------------------------------------------------
/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/javascript-playground/react-refactoring-with-tests/3cb13a12e80570675c2cd00c7f1f0dae85f405c6/public/favicon.ico


--------------------------------------------------------------------------------
/public/index.html:
--------------------------------------------------------------------------------
 1 | <!doctype html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
 6 |     <meta name="theme-color" content="#000000">
 7 |     <!--
 8 |       manifest.json provides metadata used when your web app is added to the
 9 |       homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
10 |     -->
11 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
12 |     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
13 |     <!--
14 |       Notice the use of %PUBLIC_URL% in the tags above.
15 |       It will be replaced with the URL of the `public` folder during the build.
16 |       Only files inside the `public` folder can be referenced from the HTML.
17 | 
18 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
19 |       work correctly both with client-side routing and a non-root public URL.
20 |       Learn how to configure a non-root public URL by running `npm run build`.
21 |     -->
22 |     <title>React App</title>
23 |   </head>
24 |   <body>
25 |     <noscript>
26 |       You need to enable JavaScript to run this app.
27 |     </noscript>
28 |     <div id="root"></div>
29 |     <!--
30 |       This HTML file is a template.
31 |       If you open it directly in the browser, you will see an empty page.
32 | 
33 |       You can add webfonts, meta tags, or analytics to this file.
34 |       The build step will place the bundled scripts into the <body> tag.
35 | 
36 |       To begin the development, run `npm start` or `yarn start`.
37 |       To create a production bundle, use `npm run build` or `yarn build`.
38 |     -->
39 |   </body>
40 | </html>
41 | 


--------------------------------------------------------------------------------
/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "192x192",
 8 |       "type": "image/png"
 9 |     }
10 |   ],
11 |   "start_url": "./index.html",
12 |   "display": "standalone",
13 |   "theme_color": "#000000",
14 |   "background_color": "#ffffff"
15 | }
16 | 


--------------------------------------------------------------------------------
/scripts/build.js:
--------------------------------------------------------------------------------
  1 | 'use strict';
  2 | 
  3 | // Do this as the first thing so that any code reading it knows the right env.
  4 | process.env.BABEL_ENV = 'production';
  5 | process.env.NODE_ENV = 'production';
  6 | 
  7 | // Makes the script crash on unhandled rejections instead of silently
  8 | // ignoring them. In the future, promise rejections that are not handled will
  9 | // terminate the Node.js process with a non-zero exit code.
 10 | process.on('unhandledRejection', err => {
 11 |   throw err;
 12 | });
 13 | 
 14 | // Ensure environment variables are read.
 15 | require('../config/env');
 16 | 
 17 | const path = require('path');
 18 | const chalk = require('chalk');
 19 | const fs = require('fs-extra');
 20 | const webpack = require('webpack');
 21 | const config = require('../config/webpack.config.prod');
 22 | const paths = require('../config/paths');
 23 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
 24 | const formatWebpackMessages = require('react-dev-utils/formatWebpackMessages');
 25 | const printHostingInstructions = require('react-dev-utils/printHostingInstructions');
 26 | const FileSizeReporter = require('react-dev-utils/FileSizeReporter');
 27 | 
 28 | const measureFileSizesBeforeBuild =
 29 |   FileSizeReporter.measureFileSizesBeforeBuild;
 30 | const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild;
 31 | const useYarn = fs.existsSync(paths.yarnLockFile);
 32 | 
 33 | // These sizes are pretty large. We'll warn for bundles exceeding them.
 34 | const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
 35 | const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
 36 | 
 37 | // Warn and crash if required files are missing
 38 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
 39 |   process.exit(1);
 40 | }
 41 | 
 42 | // First, read the current file sizes in build directory.
 43 | // This lets us display how much they changed later.
 44 | measureFileSizesBeforeBuild(paths.appBuild)
 45 |   .then(previousFileSizes => {
 46 |     // Remove all content but keep the directory so that
 47 |     // if you're in it, you don't end up in Trash
 48 |     fs.emptyDirSync(paths.appBuild);
 49 |     // Merge with the public folder
 50 |     copyPublicFolder();
 51 |     // Start the webpack build
 52 |     return build(previousFileSizes);
 53 |   })
 54 |   .then(
 55 |     ({ stats, previousFileSizes, warnings }) => {
 56 |       if (warnings.length) {
 57 |         console.log(chalk.yellow('Compiled with warnings.\n'));
 58 |         console.log(warnings.join('\n\n'));
 59 |         console.log(
 60 |           '\nSearch for the ' +
 61 |             chalk.underline(chalk.yellow('keywords')) +
 62 |             ' to learn more about each warning.'
 63 |         );
 64 |         console.log(
 65 |           'To ignore, add ' +
 66 |             chalk.cyan('// eslint-disable-next-line') +
 67 |             ' to the line before.\n'
 68 |         );
 69 |       } else {
 70 |         console.log(chalk.green('Compiled successfully.\n'));
 71 |       }
 72 | 
 73 |       console.log('File sizes after gzip:\n');
 74 |       printFileSizesAfterBuild(
 75 |         stats,
 76 |         previousFileSizes,
 77 |         paths.appBuild,
 78 |         WARN_AFTER_BUNDLE_GZIP_SIZE,
 79 |         WARN_AFTER_CHUNK_GZIP_SIZE
 80 |       );
 81 |       console.log();
 82 | 
 83 |       const appPackage = require(paths.appPackageJson);
 84 |       const publicUrl = paths.publicUrl;
 85 |       const publicPath = config.output.publicPath;
 86 |       const buildFolder = path.relative(process.cwd(), paths.appBuild);
 87 |       printHostingInstructions(
 88 |         appPackage,
 89 |         publicUrl,
 90 |         publicPath,
 91 |         buildFolder,
 92 |         useYarn
 93 |       );
 94 |     },
 95 |     err => {
 96 |       console.log(chalk.red('Failed to compile.\n'));
 97 |       console.log((err.message || err) + '\n');
 98 |       process.exit(1);
 99 |     }
100 |   );
101 | 
102 | // Create the production build and print the deployment instructions.
103 | function build(previousFileSizes) {
104 |   console.log('Creating an optimized production build...');
105 | 
106 |   let compiler = webpack(config);
107 |   return new Promise((resolve, reject) => {
108 |     compiler.run((err, stats) => {
109 |       if (err) {
110 |         return reject(err);
111 |       }
112 |       const messages = formatWebpackMessages(stats.toJson({}, true));
113 |       if (messages.errors.length) {
114 |         return reject(new Error(messages.errors.join('\n\n')));
115 |       }
116 |       if (
117 |         process.env.CI &&
118 |         (typeof process.env.CI !== 'string' ||
119 |           process.env.CI.toLowerCase() !== 'false') &&
120 |         messages.warnings.length
121 |       ) {
122 |         console.log(
123 |           chalk.yellow(
124 |             '\nTreating warnings as errors because process.env.CI = true.\n' +
125 |               'Most CI servers set it automatically.\n'
126 |           )
127 |         );
128 |         return reject(new Error(messages.warnings.join('\n\n')));
129 |       }
130 |       return resolve({
131 |         stats,
132 |         previousFileSizes,
133 |         warnings: messages.warnings,
134 |       });
135 |     });
136 |   });
137 | }
138 | 
139 | function copyPublicFolder() {
140 |   fs.copySync(paths.appPublic, paths.appBuild, {
141 |     dereference: true,
142 |     filter: file => file !== paths.appHtml,
143 |   });
144 | }
145 | 


--------------------------------------------------------------------------------
/scripts/start.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | // Do this as the first thing so that any code reading it knows the right env.
 4 | process.env.BABEL_ENV = 'development';
 5 | process.env.NODE_ENV = 'development';
 6 | 
 7 | // Makes the script crash on unhandled rejections instead of silently
 8 | // ignoring them. In the future, promise rejections that are not handled will
 9 | // terminate the Node.js process with a non-zero exit code.
10 | process.on('unhandledRejection', err => {
11 |   throw err;
12 | });
13 | 
14 | // Ensure environment variables are read.
15 | require('../config/env');
16 | 
17 | const fs = require('fs');
18 | const chalk = require('chalk');
19 | const webpack = require('webpack');
20 | const WebpackDevServer = require('webpack-dev-server');
21 | const clearConsole = require('react-dev-utils/clearConsole');
22 | const checkRequiredFiles = require('react-dev-utils/checkRequiredFiles');
23 | const {
24 |   choosePort,
25 |   createCompiler,
26 |   prepareProxy,
27 |   prepareUrls,
28 | } = require('react-dev-utils/WebpackDevServerUtils');
29 | const openBrowser = require('react-dev-utils/openBrowser');
30 | const paths = require('../config/paths');
31 | const config = require('../config/webpack.config.dev');
32 | const createDevServerConfig = require('../config/webpackDevServer.config');
33 | 
34 | const useYarn = fs.existsSync(paths.yarnLockFile);
35 | const isInteractive = process.stdout.isTTY;
36 | 
37 | // Warn and crash if required files are missing
38 | if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
39 |   process.exit(1);
40 | }
41 | 
42 | // Tools like Cloud9 rely on this.
43 | const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000;
44 | const HOST = process.env.HOST || '0.0.0.0';
45 | 
46 | // We attempt to use the default port but if it is busy, we offer the user to
47 | // run on a different port. `detect()` Promise resolves to the next free port.
48 | choosePort(HOST, DEFAULT_PORT)
49 |   .then(port => {
50 |     if (port == null) {
51 |       // We have not found a port.
52 |       return;
53 |     }
54 |     const protocol = process.env.HTTPS === 'true' ? 'https' : 'http';
55 |     const appName = require(paths.appPackageJson).name;
56 |     const urls = prepareUrls(protocol, HOST, port);
57 |     // Create a webpack compiler that is configured with custom messages.
58 |     const compiler = createCompiler(webpack, config, appName, urls, useYarn);
59 |     // Load proxy config
60 |     const proxySetting = require(paths.appPackageJson).proxy;
61 |     const proxyConfig = prepareProxy(proxySetting, paths.appPublic);
62 |     // Serve webpack assets generated by the compiler over a web sever.
63 |     const serverConfig = createDevServerConfig(
64 |       proxyConfig,
65 |       urls.lanUrlForConfig
66 |     );
67 |     const devServer = new WebpackDevServer(compiler, serverConfig);
68 |     // Launch WebpackDevServer.
69 |     devServer.listen(port, HOST, err => {
70 |       if (err) {
71 |         return console.log(err);
72 |       }
73 |       if (isInteractive) {
74 |         clearConsole();
75 |       }
76 |       console.log(chalk.cyan('Starting the development server...\n'));
77 |       openBrowser(urls.localUrlForBrowser);
78 |     });
79 | 
80 |     ['SIGINT', 'SIGTERM'].forEach(function(sig) {
81 |       process.on(sig, function() {
82 |         devServer.close();
83 |         process.exit();
84 |       });
85 |     });
86 |   })
87 |   .catch(err => {
88 |     if (err && err.message) {
89 |       console.log(err.message);
90 |     }
91 |     process.exit(1);
92 |   });
93 | 


--------------------------------------------------------------------------------
/scripts/test.js:
--------------------------------------------------------------------------------
 1 | 'use strict';
 2 | 
 3 | // Do this as the first thing so that any code reading it knows the right env.
 4 | process.env.BABEL_ENV = 'test';
 5 | process.env.NODE_ENV = 'test';
 6 | process.env.PUBLIC_URL = '';
 7 | 
 8 | // Makes the script crash on unhandled rejections instead of silently
 9 | // ignoring them. In the future, promise rejections that are not handled will
10 | // terminate the Node.js process with a non-zero exit code.
11 | process.on('unhandledRejection', err => {
12 |   throw err;
13 | });
14 | 
15 | // Ensure environment variables are read.
16 | require('../config/env');
17 | 
18 | const jest = require('jest');
19 | const argv = process.argv.slice(2);
20 | 
21 | // Watch unless on CI or in coverage mode
22 | if (!process.env.CI && argv.indexOf('--coverage') < 0) {
23 |   argv.push('--watch');
24 | }
25 | 
26 | 
27 | jest.run(argv);
28 | 


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   animation: App-logo-spin infinite 20s linear;
 7 |   height: 80px;
 8 | }
 9 | 
10 | .App-header {
11 |   background-color: #222;
12 |   height: 150px;
13 |   padding: 20px;
14 |   color: white;
15 | }
16 | 
17 | .App-intro {
18 |   font-size: large;
19 | }
20 | 
21 | @keyframes App-logo-spin {
22 |   from { transform: rotate(0deg); }
23 |   to { transform: rotate(360deg); }
24 | }
25 | 


--------------------------------------------------------------------------------
/src/App.js:
--------------------------------------------------------------------------------
 1 | import React, { Component } from 'react';
 2 | import './App.css';
 3 | 
 4 | import Money from './Money'
 5 | import MoneyRange from './MoneyRange'
 6 | 
 7 | class App extends Component {
 8 |   render() {
 9 |     return (
10 |       <div className="App">
11 |         <p className="App-intro">
12 |           The price of your tickets is <Money amount={2000} currency="GBP" />
13 |         </p>
14 |         <p className="App-intro">
15 |           The price of your tickets is <MoneyRange min={2000} max={4000} currency="GBP" />
16 |         </p>
17 |       </div>
18 |     );
19 |   }
20 | }
21 | 
22 | export default App;
23 | 


--------------------------------------------------------------------------------
/src/Money.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import PropTypes from 'prop-types'
 3 | import { formatAmount } from './format-currency'
 4 | import { getCurrencyData } from './currency-data'
 5 | 
 6 | const Money = ({ currency, amount }) => {
 7 |   const currencyData = getCurrencyData(currency)
 8 |   if (currencyData) {
 9 |     const { symbol, base } = currencyData
10 |     const formatted = formatAmount(amount, base)
11 | 
12 |     return (
13 |       <span>{symbol}{formatted}</span>
14 |     )
15 |   } else {
16 |     return <span>{amount}</span>
17 |   }
18 | 
19 | }
20 | 
21 | Money.propTypes = {
22 |   currency: PropTypes.string.isRequired,
23 |   amount: PropTypes.number.isRequired,
24 | }
25 | 
26 | export default Money
27 | 


--------------------------------------------------------------------------------
/src/Money.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react'
 2 | import Money from './Money'
 3 | 
 4 | import { shallow } from 'enzyme'
 5 | 
 6 | describe('Money', () => {
 7 |   it('takes a currency, amount and formats correctly', () => {
 8 |     const wrapper = shallow(<Money amount={2000} currency="GBP" />)
 9 | 
10 |     expect(wrapper.find('span').text()).toEqual('£20.00')
11 |   })
12 | 
13 |   it('leaves the number unformatted if it does not know the currency', () => {
14 |     const wrapper = shallow(<Money amount={2000} currency="MADEUP" />)
15 | 
16 |     expect(wrapper.find('span').text()).toEqual('2000')
17 |   })
18 | 
19 | })
20 | 
21 | 
22 | 


--------------------------------------------------------------------------------
/src/MoneyRange.js:
--------------------------------------------------------------------------------
 1 | import React, { Component } from 'react'
 2 | import PropTypes from 'prop-types'
 3 | import Money from './Money'
 4 | 
 5 | class MoneyRange extends Component {
 6 |   static propTypes = {
 7 |     min: PropTypes.number.isRequired,
 8 |     max: PropTypes.number.isRequired,
 9 |     currency: PropTypes.string.isRequired,
10 |   }
11 | 
12 |   render() {
13 |     const { min, max, currency } = this.props
14 | 
15 |     return (
16 |       <span>from <Money amount={min} currency={currency} /> to <Money amount={max} currency={currency} /></span>
17 |     )
18 |   }
19 | }
20 | 
21 | export default MoneyRange
22 | 
23 | 


--------------------------------------------------------------------------------
/src/MoneyRange.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react'
 2 | import MoneyRange from './MoneyRange'
 3 | import { shallow } from 'enzyme'
 4 | 
 5 | describe('MoneyRange', () => {
 6 |   it('can take two amounts and show the range', () => {
 7 |     const wrapper = shallow(<MoneyRange min={2000} max={4000} currency="GBP" />)
 8 | 
 9 |     expect(wrapper.find('span').text()).toEqual('from <Money /> to <Money />')
10 |     const moneyComponents = wrapper.find('Money')
11 |     expect(moneyComponents.at(0).props()).toEqual({ amount: 2000, currency: 'GBP' })
12 |     expect(moneyComponents.at(1).props()).toEqual({ amount: 4000, currency: 'GBP' })
13 |   })
14 | })
15 | 


--------------------------------------------------------------------------------
/src/currency-data.js:
--------------------------------------------------------------------------------
1 | export const getCurrencyData = currency => {
2 |   return {
3 |     GBP: { base: 100, symbol: '£' },
4 |     USD: { base: 100, symbol: '$' },
5 |   }[currency]
6 | }
7 | 


--------------------------------------------------------------------------------
/src/currency-data.test.js:
--------------------------------------------------------------------------------
 1 | import { getCurrencyData } from './currency-data'
 2 | 
 3 | test('for GBP it returns the right data', () => {
 4 |   expect(getCurrencyData('GBP')).toEqual({
 5 |     base: 100,
 6 |     symbol: '£',
 7 |   })
 8 | })
 9 | 
10 | 


--------------------------------------------------------------------------------
/src/format-currency.js:
--------------------------------------------------------------------------------
1 | export const formatAmount = (amount, base) => {
2 |   return parseFloat(amount / base).toFixed(2)
3 | }
4 | 


--------------------------------------------------------------------------------
/src/format-currency.test.js:
--------------------------------------------------------------------------------
 1 | import { formatAmount } from './format-currency'
 2 | 
 3 | test('it formats the amount to 2 dp', () => {
 4 |   expect(formatAmount(2000, 100)).toEqual('20.00')
 5 | })
 6 | 
 7 | test('respects the base', () => {
 8 |   expect(formatAmount(2000, 10)).toEqual('200.00')
 9 | })
10 | 
11 | test('it deals with decimal places correctly', () => {
12 |   expect(formatAmount(2050, 100)).toEqual('20.50')
13 | })
14 | 


--------------------------------------------------------------------------------
/src/index.css:
--------------------------------------------------------------------------------
1 | body {
2 |   margin: 0;
3 |   padding: 0;
4 |   font-family: sans-serif;
5 | }
6 | 


--------------------------------------------------------------------------------
/src/index.js:
--------------------------------------------------------------------------------
1 | import React from 'react';
2 | import ReactDOM from 'react-dom';
3 | import './index.css';
4 | import App from './App';
5 | import registerServiceWorker from './registerServiceWorker';
6 | 
7 | ReactDOM.render(<App />, document.getElementById('root'));
8 | registerServiceWorker();
9 | 


--------------------------------------------------------------------------------
/src/logo.svg:
--------------------------------------------------------------------------------
1 | <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
2 |     <g fill="#61DAFB">
3 |         <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
4 |         <circle cx="420.9" cy="296.5" r="45.7"/>
5 |         <path d="M520.5 78.1z"/>
6 |     </g>
7 | </svg>
8 | 


--------------------------------------------------------------------------------
/src/registerServiceWorker.js:
--------------------------------------------------------------------------------
  1 | // In production, we register a service worker to serve assets from local cache.
  2 | 
  3 | // This lets the app load faster on subsequent visits in production, and gives
  4 | // it offline capabilities. However, it also means that developers (and users)
  5 | // will only see deployed updates on the "N+1" visit to a page, since previously
  6 | // cached resources are updated in the background.
  7 | 
  8 | // To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
  9 | // This link also includes instructions on opting out of this behavior.
 10 | 
 11 | const isLocalhost = Boolean(
 12 |   window.location.hostname === 'localhost' ||
 13 |     // [::1] is the IPv6 localhost address.
 14 |     window.location.hostname === '[::1]' ||
 15 |     // 127.0.0.1/8 is considered localhost for IPv4.
 16 |     window.location.hostname.match(
 17 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 18 |     )
 19 | );
 20 | 
 21 | export default function register() {
 22 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 23 |     // The URL constructor is available in all browsers that support SW.
 24 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
 25 |     if (publicUrl.origin !== window.location.origin) {
 26 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 27 |       // from what our page is served on. This might happen if a CDN is used to
 28 |       // serve assets; see https://github.com/facebookincubator/create-react-app/issues/2374
 29 |       return;
 30 |     }
 31 | 
 32 |     window.addEventListener('load', () => {
 33 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 34 | 
 35 |       if (!isLocalhost) {
 36 |         // Is not local host. Just register service worker
 37 |         registerValidSW(swUrl);
 38 |       } else {
 39 |         // This is running on localhost. Lets check if a service worker still exists or not.
 40 |         checkValidServiceWorker(swUrl);
 41 |       }
 42 |     });
 43 |   }
 44 | }
 45 | 
 46 | function registerValidSW(swUrl) {
 47 |   navigator.serviceWorker
 48 |     .register(swUrl)
 49 |     .then(registration => {
 50 |       registration.onupdatefound = () => {
 51 |         const installingWorker = registration.installing;
 52 |         installingWorker.onstatechange = () => {
 53 |           if (installingWorker.state === 'installed') {
 54 |             if (navigator.serviceWorker.controller) {
 55 |               // At this point, the old content will have been purged and
 56 |               // the fresh content will have been added to the cache.
 57 |               // It's the perfect time to display a "New content is
 58 |               // available; please refresh." message in your web app.
 59 |               console.log('New content is available; please refresh.');
 60 |             } else {
 61 |               // At this point, everything has been precached.
 62 |               // It's the perfect time to display a
 63 |               // "Content is cached for offline use." message.
 64 |               console.log('Content is cached for offline use.');
 65 |             }
 66 |           }
 67 |         };
 68 |       };
 69 |     })
 70 |     .catch(error => {
 71 |       console.error('Error during service worker registration:', error);
 72 |     });
 73 | }
 74 | 
 75 | function checkValidServiceWorker(swUrl) {
 76 |   // Check if the service worker can be found. If it can't reload the page.
 77 |   fetch(swUrl)
 78 |     .then(response => {
 79 |       // Ensure service worker exists, and that we really are getting a JS file.
 80 |       if (
 81 |         response.status === 404 ||
 82 |         response.headers.get('content-type').indexOf('javascript') === -1
 83 |       ) {
 84 |         // No service worker found. Probably a different app. Reload the page.
 85 |         navigator.serviceWorker.ready.then(registration => {
 86 |           registration.unregister().then(() => {
 87 |             window.location.reload();
 88 |           });
 89 |         });
 90 |       } else {
 91 |         // Service worker found. Proceed as normal.
 92 |         registerValidSW(swUrl);
 93 |       }
 94 |     })
 95 |     .catch(() => {
 96 |       console.log(
 97 |         'No internet connection found. App is running in offline mode.'
 98 |       );
 99 |     });
100 | }
101 | 
102 | export function unregister() {
103 |   if ('serviceWorker' in navigator) {
104 |     navigator.serviceWorker.ready.then(registration => {
105 |       registration.unregister();
106 |     });
107 |   }
108 | }
109 | 


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