const autoprefixer = require('autoprefixer'); const path = require('path'); const webpack = require('webpack'); const HtmlWebpackPlugin = require('html-webpack-plugin'); const ExtractTextPlugin = require('extract-text-webpack-plugin'); const ManifestPlugin = require('webpack-manifest-plugin'); const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin'); const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin'); const eslintFormatter = require('react-dev-utils/eslintFormatter'); const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin'); const paths = require('./paths'); const getClientEnvironment = require('./env'); // Webpack uses `publicPath` to determine where the app is being served from. // It requires a trailing slash, or the file assets will get an incorrect path. const publicPath = paths.servedPath; // Some apps do not use client-side routing with pushState. // For these, "homepage" can be set to "." to enable relative asset paths. const shouldUseRelativeAssetPaths = publicPath === './'; // Source maps are resource heavy and can cause out of memory issue for large source files. const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false'; // `publicUrl` is just like `publicPath`, but we will provide it to our app // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript. // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz. const publicUrl = publicPath.slice(0, -1); // Get environment variables to inject into our app. const env = getClientEnvironment(publicUrl); // Assert this just to be safe. // Development builds of React are slow and not intended for production. if (env.stringified['process.env'].NODE_ENV !== '"production"') { throw new Error('Production builds must have NODE_ENV=production.'); } // Note: defined here because it will be used more than once. const cssFilename = 'static/css/[name].[contenthash:8].css'; // ExtractTextPlugin expects the build output to be flat. // (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27) // However, our output is structured with css, js and media folders. // To have this structure working with relative paths, we have to use custom options. const extractTextPluginOptions = shouldUseRelativeAssetPaths ? // Making sure that the publicPath goes back to to build folder. { publicPath: Array(cssFilename.split('/').length).join('../') } : {}; // This is the production configuration. // It compiles slowly and is focused on producing a fast and minimal bundle. // The development configuration is different and lives in a separate file. module.exports = { // Don't attempt to continue if there are any errors. bail: true, // We generate sourcemaps in production. This is slow but gives good results. // You can exclude the *.map files from the build during deployment. devtool: shouldUseSourceMap ? 'source-map' : false, // In production, we only want to load the polyfills and the app code. entry: [require.resolve('./polyfills'), paths.appIndexJs], output: { // The build folder. path: paths.appBuild, // Generated JS file names (with nested folders). // There will be one main bundle, and one file per asynchronous chunk. // We don't currently advertise code splitting but Webpack supports it. filename: 'static/js/[name].[chunkhash:8].js', chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js', // We inferred the "public path" (such as / or /my-project) from homepage. publicPath: publicPath, // Point sourcemap entries to original disk location (format as URL on Windows) devtoolModuleFilenameTemplate: info => path .relative(paths.appSrc, info.absoluteResourcePath) .replace(/\\/g, '/'), }, resolve: { // This allows you to set a fallback for where Webpack should look for modules. // We placed these paths second because we want `node_modules` to "win" // if there are any conflicts. This matches Node resolution mechanism. // https://github.com/facebookincubator/create-react-app/issues/253 modules: ['node_modules', paths.appNodeModules].concat( // It is guaranteed to exist because we tweak it in `env.js` process.env.NODE_PATH.split(path.delimiter).filter(Boolean) ), // These are the reasonable defaults supported by the Node ecosystem. // We also include JSX as a common component filename extension to support // some tools, although we do not recommend using it, see: // https://github.com/facebookincubator/create-react-app/issues/290 // `web` extension prefixes have been added for better support // for React Native Web. extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'], alias: { // Support React Native Web // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/ 'react-native': 'react-native-web', }, plugins: [ // Prevents users from importing files from outside of src/ (or node_modules/). // This often causes confusion because we only process files within src/ with babel. // To fix this, we prevent you from importing files out of src/ -- if you'd like to, // please link the files into your node_modules/ and let module-resolution kick in. // Make sure your source files are compiled, as they will not be processed in any way. new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]), ], }, module: { strictExportPresence: true, rules: [ // TODO: Disable require.ensure as it's not a standard language feature. // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176. // { parser: { requireEnsure: false } }, // First, run the linter. // It's important to do this before Babel processes the JS. { test: /\.(js|jsx|mjs)$/, enforce: 'pre', use: [ { options: { formatter: eslintFormatter, eslintPath: require.resolve('eslint'), }, loader: require.resolve('eslint-loader'), }, ], include: paths.appSrc, }, { // "oneOf" will traverse all following loaders until one will // match the requirements. When no loader matches it will fall // back to the "file" loader at the end of the loader list. oneOf: [ // "url" loader works just like "file" loader but it also embeds // assets smaller than specified size as data URLs to avoid requests. { test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/], loader: require.resolve('url-loader'), options: { limit: 10000, name: 'static/media/[name].[hash:8].[ext]', }, }, // Process JS with Babel. { test: /\.(js|jsx|mjs)$/, include: paths.appSrc, loader: require.resolve('babel-loader'), options: { compact: true, }, }, // The notation here is somewhat confusing. // "postcss" loader applies autoprefixer to our CSS. // "css" loader resolves paths in CSS and adds assets as dependencies. // "style" loader normally turns CSS into JS modules injecting