1 | // @remove-on-eject-begin
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2 | /**
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3 | * Copyright (c) 2015-present, Facebook, Inc.
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4 | *
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5 | * This source code is licensed under the MIT license found in the
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6 | * LICENSE file in the root directory of this source tree.
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7 | */
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8 | // @remove-on-eject-end
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9 | ;
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10 |
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11 | const autoprefixer = require('autoprefixer');
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12 | const path = require('path');
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13 | const webpack = require('webpack');
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14 | const HtmlWebpackPlugin = require('html-webpack-plugin');
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15 | const ExtractTextPlugin = require('extract-text-webpack-plugin');
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16 | const ManifestPlugin = require('webpack-manifest-plugin');
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17 | const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
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18 | const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
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19 | const eslintFormatter = require('react-dev-utils/eslintFormatter');
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20 | const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
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21 | const paths = require('./paths');
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22 | const getClientEnvironment = require('./env');
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23 |
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24 | // Webpack uses `publicPath` to determine where the app is being served from.
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25 | // It requires a trailing slash, or the file assets will get an incorrect path.
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26 | const publicPath = paths.servedPath;
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27 | // Some apps do not use client-side routing with pushState.
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28 | // For these, "homepage" can be set to "." to enable relative asset paths.
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29 | const shouldUseRelativeAssetPaths = publicPath === './';
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30 | // Source maps are resource heavy and can cause out of memory issue for large source files.
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31 | const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
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32 | // `publicUrl` is just like `publicPath`, but we will provide it to our app
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33 | // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
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34 | // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
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35 | const publicUrl = publicPath.slice(0, -1);
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36 | // Get environment variables to inject into our app.
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37 | const env = getClientEnvironment(publicUrl);
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38 |
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39 | // Assert this just to be safe.
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40 | // Development builds of React are slow and not intended for production.
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41 | if (env.stringified['process.env'].NODE_ENV !== '"production"') {
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42 | throw new Error('Production builds must have NODE_ENV=production.');
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43 | }
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44 |
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45 | // Note: defined here because it will be used more than once.
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46 | const cssFilename = 'static/css/[name].[contenthash:8].css';
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47 |
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48 | // ExtractTextPlugin expects the build output to be flat.
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49 | // (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27)
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50 | // However, our output is structured with css, js and media folders.
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51 | // To have this structure working with relative paths, we have to use custom options.
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52 | const extractTextPluginOptions = shouldUseRelativeAssetPaths
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53 | ? // Making sure that the publicPath goes back to to build folder.
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54 | { publicPath: Array(cssFilename.split('/').length).join('../') }
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55 | : {};
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56 |
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57 | // This is the production configuration.
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58 | // It compiles slowly and is focused on producing a fast and minimal bundle.
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59 | // The development configuration is different and lives in a separate file.
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60 | module.exports = {
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61 | // Don't attempt to continue if there are any errors.
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62 | bail: true,
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63 | // We generate sourcemaps in production. This is slow but gives good results.
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64 | // You can exclude the *.map files from the build during deployment.
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65 | devtool: shouldUseSourceMap ? 'source-map' : false,
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66 | // In production, we only want to load the polyfills and the app code.
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67 | entry: [require.resolve('./polyfills'), paths.appIndexJs],
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68 | output: {
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69 | // The build folder.
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70 | path: paths.appBuild,
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71 | // Generated JS file names (with nested folders).
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72 | // There will be one main bundle, and one file per asynchronous chunk.
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73 | // We don't currently advertise code splitting but Webpack supports it.
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74 | filename: 'static/js/[name].[chunkhash:8].js',
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75 | chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
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76 | // We inferred the "public path" (such as / or /my-project) from homepage.
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77 | publicPath: publicPath,
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78 | // Point sourcemap entries to original disk location (format as URL on Windows)
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79 | devtoolModuleFilenameTemplate: info =>
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80 | path
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81 | .relative(paths.appSrc, info.absoluteResourcePath)
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82 | .replace(/\\/g, '/'),
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83 | },
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84 | resolve: {
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85 | // This allows you to set a fallback for where Webpack should look for modules.
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86 | // We placed these paths second because we want `node_modules` to "win"
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87 | // if there are any conflicts. This matches Node resolution mechanism.
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88 | // https://github.com/facebookincubator/create-react-app/issues/253
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89 | modules: ['node_modules', 'src', paths.appNodeModules].concat(
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90 | // It is guaranteed to exist because we tweak it in `env.js`
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91 | process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
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92 | ),
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93 | // These are the reasonable defaults supported by the Node ecosystem.
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94 | // We also include JSX as a common component filename extension to support
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95 | // some tools, although we do not recommend using it, see:
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96 | // https://github.com/facebookincubator/create-react-app/issues/290
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97 | // `web` extension prefixes have been added for better support
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98 | // for React Native Web.
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99 | extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
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100 | alias: {
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101 | // @remove-on-eject-begin
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102 | // Resolve Babel runtime relative to react-scripts.
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103 | // It usually still works on npm 3 without this but it would be
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104 | // unfortunate to rely on, as react-scripts could be symlinked,
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105 | // and thus babel-runtime might not be resolvable from the source.
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106 | 'babel-runtime': path.dirname(
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107 | require.resolve('babel-runtime/package.json')
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108 | ),
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109 | // @remove-on-eject-end
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110 | // Support React Native Web
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111 | // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
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112 | 'react-native': 'react-native-web',
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113 | },
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114 | plugins: [
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115 | // Prevents users from importing files from outside of src/ (or node_modules/).
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116 | // This often causes confusion because we only process files within src/ with babel.
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117 | // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
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118 | // please link the files into your node_modules/ and let module-resolution kick in.
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119 | // Make sure your source files are compiled, as they will not be processed in any way.
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120 | new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
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121 | ],
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122 | },
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123 | module: {
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124 | strictExportPresence: true,
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125 | rules: [
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126 | // TODO: Disable require.ensure as it's not a standard language feature.
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127 | // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
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128 | // { parser: { requireEnsure: false } },
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129 |
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130 | // First, run the linter.
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131 | // It's important to do this before Babel processes the JS.
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132 | {
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133 | test: /\.(js|jsx|mjs)$/,
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134 | enforce: 'pre',
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135 | use: [
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136 | {
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137 | options: {
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138 | formatter: eslintFormatter,
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139 | eslintPath: require.resolve('eslint'),
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140 | // @remove-on-eject-begin
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141 | // TODO: consider separate config for production,
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142 | // e.g. to enable no-console and no-debugger only in production.
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143 | baseConfig: {
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144 | extends: [require.resolve('eslint-config-react-app')],
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145 | },
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146 | ignore: false,
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147 | useEslintrc: false,
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148 | // @remove-on-eject-end
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149 | },
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150 | loader: require.resolve('eslint-loader'),
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151 | },
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152 | ],
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153 | include: paths.appSrc,
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154 | },
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155 | {
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156 | // "oneOf" will traverse all following loaders until one will
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157 | // match the requirements. When no loader matches it will fall
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158 | // back to the "file" loader at the end of the loader list.
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159 | oneOf: [
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160 | // "url" loader works just like "file" loader but it also embeds
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161 | // assets smaller than specified size as data URLs to avoid requests.
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162 | {
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163 | test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
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164 | loader: require.resolve('url-loader'),
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165 | options: {
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166 | limit: 10000,
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167 | name: 'static/media/[name].[hash:8].[ext]',
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168 | },
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169 | },
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170 | // Process JS with Babel.
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171 | {
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172 | test: /\.(js|jsx|mjs)$/,
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173 | include: paths.appSrc,
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174 | loader: require.resolve('babel-loader'),
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175 | options: {
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176 | // @remove-on-eject-begin
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177 | babelrc: false,
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178 | presets: [require.resolve('babel-preset-react-app')],
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179 | // @remove-on-eject-end
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180 | compact: true,
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181 | },
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182 | },
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183 | // The notation here is somewhat confusing.
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184 | // "postcss" loader applies autoprefixer to our CSS.
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185 | // "css" loader resolves paths in CSS and adds assets as dependencies.
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186 | // "style" loader normally turns CSS into JS modules injecting <style>,
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187 | // but unlike in development configuration, we do something different.
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188 | // `ExtractTextPlugin` first applies the "postcss" and "css" loaders
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189 | // (second argument), then grabs the result CSS and puts it into a
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190 | // separate file in our build process. This way we actually ship
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191 | // a single CSS file in production instead of JS code injecting <style>
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192 | // tags. If you use code splitting, however, any async bundles will still
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193 | // use the "style" loader inside the async code so CSS from them won't be
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194 | // in the main CSS file.
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195 | {
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196 | test: /\.css$/,
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197 | loader: ExtractTextPlugin.extract(
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198 | Object.assign(
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199 | {
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200 | fallback: {
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201 | loader: require.resolve('style-loader'),
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202 | options: {
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203 | hmr: false,
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204 | },
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205 | },
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206 | use: [
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207 | {
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208 | loader: require.resolve('css-loader'),
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209 | options: {
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210 | importLoaders: 1,
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211 | minimize: true,
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212 | sourceMap: shouldUseSourceMap,
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213 | },
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214 | },
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215 | {
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216 | loader: require.resolve('postcss-loader'),
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217 | options: {
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218 | // Necessary for external CSS imports to work
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219 | // https://github.com/facebookincubator/create-react-app/issues/2677
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220 | ident: 'postcss',
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221 | plugins: () => [
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222 | require('postcss-flexbugs-fixes'),
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223 | autoprefixer({
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224 | browsers: [
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225 | '>1%',
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226 | 'last 4 versions',
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227 | 'Firefox ESR',
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228 | 'not ie < 9', // React doesn't support IE8 anyway
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229 | ],
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230 | flexbox: 'no-2009',
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231 | }),
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232 | ],
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233 | },
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234 | },
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235 | ],
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236 | },
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237 | extractTextPluginOptions
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238 | )
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239 | ),
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240 | // Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
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241 | },
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242 | // "file" loader makes sure assets end up in the `build` folder.
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243 | // When you `import` an asset, you get its filename.
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244 | // This loader doesn't use a "test" so it will catch all modules
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245 | // that fall through the other loaders.
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246 | {
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247 | loader: require.resolve('file-loader'),
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248 | // Exclude `js` files to keep "css" loader working as it injects
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249 | // it's runtime that would otherwise processed through "file" loader.
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250 | // Also exclude `html` and `json` extensions so they get processed
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251 | // by webpacks internal loaders.
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252 | exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
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253 | options: {
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254 | name: 'static/media/[name].[hash:8].[ext]',
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255 | },
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256 | },
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257 | // ** STOP ** Are you adding a new loader?
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258 | // Make sure to add the new loader(s) before the "file" loader.
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259 | ],
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260 | },
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261 | ],
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262 | },
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263 | plugins: [
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264 | // Makes some environment variables available in index.html.
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265 | // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
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266 | // <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
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267 | // In production, it will be an empty string unless you specify "homepage"
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268 | // in `package.json`, in which case it will be the pathname of that URL.
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269 | new InterpolateHtmlPlugin(env.raw),
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270 | // Generates an `index.html` file with the <script> injected.
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271 | new HtmlWebpackPlugin({
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272 | inject: true,
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273 | template: paths.appHtml,
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274 | minify: {
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275 | removeComments: true,
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276 | collapseWhitespace: true,
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277 | removeRedundantAttributes: true,
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278 | useShortDoctype: true,
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279 | removeEmptyAttributes: true,
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280 | removeStyleLinkTypeAttributes: true,
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281 | keepClosingSlash: true,
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282 | minifyJS: true,
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283 | minifyCSS: true,
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284 | minifyURLs: true,
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285 | },
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286 | }),
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287 | // Makes some environment variables available to the JS code, for example:
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288 | // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
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289 | // It is absolutely essential that NODE_ENV was set to production here.
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290 | // Otherwise React will be compiled in the very slow development mode.
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291 | new webpack.DefinePlugin(env.stringified),
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292 | // Minify the code.
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293 | new webpack.optimize.UglifyJsPlugin({
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294 | compress: {
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295 | warnings: false,
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296 | // Disabled because of an issue with Uglify breaking seemingly valid code:
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297 | // https://github.com/facebookincubator/create-react-app/issues/2376
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298 | // Pending further investigation:
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299 | // https://github.com/mishoo/UglifyJS2/issues/2011
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300 | comparisons: false,
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301 | },
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302 | mangle: {
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303 | safari10: true,
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304 | },
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305 | output: {
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306 | comments: false,
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307 | // Turned on because emoji and regex is not minified properly using default
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308 | // https://github.com/facebookincubator/create-react-app/issues/2488
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309 | ascii_only: true,
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310 | },
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311 | sourceMap: shouldUseSourceMap,
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312 | }),
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313 | // Note: this won't work without ExtractTextPlugin.extract(..) in `loaders`.
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314 | new ExtractTextPlugin({
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315 | filename: cssFilename,
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316 | }),
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317 | // Generate a manifest file which contains a mapping of all asset filenames
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318 | // to their corresponding output file so that tools can pick it up without
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319 | // having to parse `index.html`.
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320 | new ManifestPlugin({
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321 | fileName: 'asset-manifest.json',
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322 | }),
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323 | // Generate a service worker script that will precache, and keep up to date,
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324 | // the HTML & assets that are part of the Webpack build.
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325 | new SWPrecacheWebpackPlugin({
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326 | // By default, a cache-busting query parameter is appended to requests
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327 | // used to populate the caches, to ensure the responses are fresh.
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328 | // If a URL is already hashed by Webpack, then there is no concern
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329 | // about it being stale, and the cache-busting can be skipped.
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330 | dontCacheBustUrlsMatching: /\.\w{8}\./,
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331 | filename: 'service-worker.js',
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332 | logger(message) {
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333 | if (message.indexOf('Total precache size is') === 0) {
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334 | // This message occurs for every build and is a bit too noisy.
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335 | return;
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336 | }
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337 | if (message.indexOf('Skipping static resource') === 0) {
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338 | // This message obscures real errors so we ignore it.
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339 | // https://github.com/facebookincubator/create-react-app/issues/2612
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340 | return;
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341 | }
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342 | console.log(message);
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343 | },
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344 | minify: true,
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345 | // For unknown URLs, fallback to the index page
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346 | navigateFallback: publicUrl + '/index.html',
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347 | // Ignores URLs starting from /__ (useful for Firebase):
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348 | // https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
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349 | navigateFallbackWhitelist: [/^(?!\/__).*/],
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350 | // Don't precache sourcemaps (they're large) and build asset manifest:
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351 | staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
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352 | }),
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353 | // Moment.js is an extremely popular library that bundles large locale files
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354 | // by default due to how Webpack interprets its code. This is a practical
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355 | // solution that requires the user to opt into importing specific locales.
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356 | // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
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357 | // You can remove this if you don't use Moment.js:
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358 | new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
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359 | ],
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360 | // Some libraries import Node modules but don't use them in the browser.
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361 | // Tell Webpack to provide empty mocks for them so importing them works.
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362 | node: {
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363 | dgram: 'empty',
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364 | fs: 'empty',
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365 | net: 'empty',
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366 | tls: 'empty',
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367 | child_process: 'empty',
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368 | },
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369 | };
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