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Jeffrey Posnick authored
* Updates to reflect service worker registration being opt-in. * Fixed an anchor link. * Updates to SWPrecacheWebpackPlugin config, and corresponding docs.
1b281314
// @remove-on-eject-begin/** * Copyright (c) 2015-present, Facebook, Inc. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. */// @remove-on-eject-end'use strict';const autoprefixer = require('autoprefixer');const path = require('path');const webpack = require('webpack');const HtmlWebpackPlugin = require('html-webpack-plugin');const TerserPlugin = require('terser-webpack-plugin');const MiniCssExtractPlugin = require('mini-css-extract-plugin');const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');const ManifestPlugin = require('webpack-manifest-plugin');const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');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;// 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.');}// style files regexesconst cssRegex = /\.css$/;const cssModuleRegex = /\.module\.css$/;const sassRegex = /\.(scss|sass)$/;const sassModuleRegex = /\.module\.(scss|sass)$/;// common function to get style loadersconst getStyleLoaders = (cssOptions, preProcessor) => { const loaders = [ MiniCssExtractPlugin.loader, { loader: require.resolve('css-loader'), options: cssOptions, }, { // Options for PostCSS as we reference these options twice // Adds vendor prefixing based on your specified browser support in // package.json loader: require.resolve('postcss-loader'), options: { // Necessary for external CSS imports to work // https://github.com/facebook/create-react-app/issues/2677 ident: 'postcss', plugins: () => [ require('postcss-flexbugs-fixes'), autoprefixer({ flexbox: 'no-2009',7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
}),
],
sourceMap: shouldUseSourceMap,
},
},
];
if (preProcessor) {
loaders.push({
loader: require.resolve(preProcessor),
options: {
sourceMap: shouldUseSourceMap,
},
});
}
return loaders;
};
// 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 = {
mode: 'production',
// 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, '/'),
},
optimization: {
minimizer: [
new TerserPlugin({
terserOptions: {
parse: {
// we want terser to parse ecma 8 code. However, we don't want it
// to apply any minfication steps that turns valid ecma 5 code
// into invalid ecma 5 code. This is why the 'compress' and 'output'
// sections only apply transformations that are ecma 5 safe
// https://github.com/facebook/create-react-app/pull/4234
ecma: 8,
},
compress: {
ecma: 5,
warnings: false,
// Disabled because of an issue with Uglify breaking seemingly valid code:
// https://github.com/facebook/create-react-app/issues/2376
// Pending further investigation:
// https://github.com/mishoo/UglifyJS2/issues/2011
comparisons: false,
},
mangle: {
safari10: true,
},
output: {
141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210
ecma: 5,
comments: false,
// Turned on because emoji and regex is not minified properly using default
// https://github.com/facebook/create-react-app/issues/2488
ascii_only: true,
},
},
// Use multi-process parallel running to improve the build speed
// Default number of concurrent runs: os.cpus().length - 1
parallel: true,
// Enable file caching
cache: true,
sourceMap: shouldUseSourceMap,
}),
new OptimizeCSSAssetsPlugin({ cssProcessorOptions: { safe: true } }),
],
// Automatically split vendor and commons
// https://twitter.com/wSokra/status/969633336732905474
// https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
splitChunks: {
chunks: 'all',
name: false,
},
// Keep the runtime chunk seperated to enable long term caching
// https://twitter.com/wSokra/status/969679223278505985
runtimeChunk: true,
},
resolve: {
// This allows you to set a fallback for where Webpack should look for modules.
// We placed these paths second because we want `node_modules` to "win"
// if there are any conflicts. This matches Node resolution mechanism.
// https://github.com/facebook/create-react-app/issues/253
modules: ['node_modules'].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/facebook/create-react-app/issues/290
// `web` extension prefixes have been added for better support
// for React Native Web.
extensions: ['.web.js', '.js', '.json', '.web.jsx', '.jsx'],
alias: {
// @remove-on-eject-begin
// Resolve Babel runtime relative to react-scripts.
// It usually still works on npm 3 without this but it would be
// unfortunate to rely on, as react-scripts could be symlinked,
// and thus @babel/runtime might not be resolvable from the source.
'@babel/runtime': path.dirname(
require.resolve('@babel/runtime/package.json')
),
// @remove-on-eject-end
// 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: [
// Disable require.ensure as it's not a standard language feature.
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{ parser: { requireEnsure: false } },
// First, run the linter.
// It's important to do this before Babel processes the JS.
{
test: /\.(js|jsx)$/,
enforce: 'pre',
use: [
{
options: {
formatter: require.resolve('react-dev-utils/eslintFormatter'),
eslintPath: require.resolve('eslint'),
// @remove-on-eject-begin
// TODO: consider separate config for production,
// e.g. to enable no-console and no-debugger only in production.
baseConfig: {
extends: [require.resolve('eslint-config-react-app')],
},
ignore: false,
useEslintrc: false,
// @remove-on-eject-end
},
loader: require.resolve('eslint-loader'),
},
],
include: paths.appSrc,
},
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works just like "file" loader but it also embeds
// assets smaller than specified size as data URLs to avoid requests.
{
test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
loader: require.resolve('url-loader'),
options: {
limit: 10000,
name: 'static/media/[name].[hash:8].[ext]',
},
},
// Process application JS with Babel.
// The preset includes JSX, Flow, and some ESnext features.
{
test: /\.(js|jsx)$/,
include: paths.appSrc,
use: [
// This loader parallelizes code compilation, it is optional but
// improves compile time on larger projects
require.resolve('thread-loader'),
{
loader: require.resolve('babel-loader'),
options: {
// @remove-on-eject-begin
babelrc: false,
presets: [require.resolve('babel-preset-react-app')],
// @remove-on-eject-end
plugins: [
[
require.resolve('babel-plugin-named-asset-import'),
{
loaderMap: {
svg: {
ReactComponent: 'svgr/webpack![path]',
},
},
},
],
],
281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350
compact: true,
highlightCode: true,
},
},
],
},
// Process any JS outside of the app with Babel.
// Unlike the application JS, we only compile the standard ES features.
{
test: /\.js$/,
use: [
// This loader parallelizes code compilation, it is optional but
// improves compile time on larger projects
require.resolve('thread-loader'),
{
loader: require.resolve('babel-loader'),
options: {
babelrc: false,
compact: false,
presets: [
require.resolve('babel-preset-react-app/dependencies'),
],
cacheDirectory: true,
highlightCode: true,
},
},
],
},
// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// `MiniCSSExtractPlugin` extracts styles into CSS
// files. If you use code splitting, async bundles will have their own separate CSS chunk file.
// By default we support CSS Modules with the extension .module.css
{
test: cssRegex,
exclude: cssModuleRegex,
loader: getStyleLoaders({
importLoaders: 1,
sourceMap: shouldUseSourceMap,
}),
},
// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
// using the extension .module.css
{
test: cssModuleRegex,
loader: getStyleLoaders({
importLoaders: 1,
sourceMap: shouldUseSourceMap,
modules: true,
getLocalIdent: getCSSModuleLocalIdent,
}),
},
// Opt-in support for SASS. The logic here is somewhat similar
// as in the CSS routine, except that "sass-loader" runs first
// to compile SASS files into CSS.
// By default we support SASS Modules with the
// extensions .module.scss or .module.sass
{
test: sassRegex,
exclude: sassModuleRegex,
loader: getStyleLoaders(
{
importLoaders: 2,
sourceMap: shouldUseSourceMap,
},
'sass-loader'
),
},
// Adds support for CSS Modules, but using SASS
// using the extension .module.scss or .module.sass
351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420
{
test: sassModuleRegex,
loader: getStyleLoaders(
{
importLoaders: 2,
sourceMap: shouldUseSourceMap,
modules: true,
getLocalIdent: getCSSModuleLocalIdent,
},
'sass-loader'
),
},
// The GraphQL loader preprocesses GraphQL queries in .graphql files.
{
test: /\.(graphql)$/,
loader: 'graphql-tag/loader',
},
// "file" loader makes sure assets end up in the `build` folder.
// When you `import` an asset, you get its filename.
// This loader doesn't use a "test" so it will catch all modules
// that fall through the other loaders.
{
loader: require.resolve('file-loader'),
// Exclude `js` files to keep "css" loader working as it injects
// it's runtime that would otherwise be processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.(js|jsx)$/, /\.html$/, /\.json$/],
options: {
name: 'static/media/[name].[hash:8].[ext]',
},
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],
},
],
},
plugins: [
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin({
inject: true,
template: paths.appHtml,
minify: {
removeComments: true,
collapseWhitespace: true,
removeRedundantAttributes: true,
useShortDoctype: true,
removeEmptyAttributes: true,
removeStyleLinkTypeAttributes: true,
keepClosingSlash: true,
minifyJS: true,
minifyCSS: true,
minifyURLs: true,
},
}),
// Makes some environment variables available in index.html.
// The public URL is available as %PUBLIC_URL% in index.html, e.g.:
// <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
// In production, it will be an empty string unless you specify "homepage"
// in `package.json`, in which case it will be the pathname of that URL.
new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
// Makes some environment variables available to the JS code, for example:
// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
// It is absolutely essential that NODE_ENV was set to production here.
// Otherwise React will be compiled in the very slow development mode.
new webpack.DefinePlugin(env.stringified),
new MiniCssExtractPlugin({
// Options similar to the same options in webpackOptions.output
// both options are optional
421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487
filename: 'static/css/[name].[contenthash:8].css',
chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
}),
// Generate a manifest file which contains a mapping of all asset filenames
// to their corresponding output file so that tools can pick it up without
// having to parse `index.html`.
new ManifestPlugin({
fileName: 'asset-manifest.json',
publicPath: publicPath,
}),
// Generate a service worker script that will precache, and keep up to date,
// the HTML & assets that are part of the Webpack build.
new SWPrecacheWebpackPlugin({
// By default, a cache-busting query parameter is appended to requests
// used to populate the caches, to ensure the responses are fresh.
// If a URL is already hashed by Webpack, then there is no concern
// about it being stale, and the cache-busting can be skipped.
dontCacheBustUrlsMatching: /\.\w{8}\./,
filename: 'service-worker.js',
logger(message) {
if (message.indexOf('Total precache size is') === 0) {
// This message occurs for every build and is a bit too noisy.
return;
}
if (message.indexOf('Skipping static resource') === 0) {
// This message obscures real errors so we ignore it.
// https://github.com/facebook/create-react-app/issues/2612
return;
}
console.log(message);
},
minify: true,
// For unknown URLs, fallback to the index page
navigateFallback: publicUrl + '/index.html',
// Ignores URLs starting from /__ (useful for Firebase):
// https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
navigateFallbackWhitelist: [/^(?!\/__).*/],
// Don't precache sourcemaps (they're large) and build asset manifest:
staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
// Disabling skipWaiting ensures better compatibility with web apps that
// use deferred or lazy-loading, at the expense of "keeping around" the
// previously cached version of your web app until all open instances have
// been closed.
// See https://developers.google.com/web/fundamentals/primers/service-workers/lifecycle#skip_the_waiting_phase
skipWaiting: false,
}),
// Moment.js is an extremely popular library that bundles large locale files
// by default due to how Webpack interprets its code. This is a practical
// solution that requires the user to opt into importing specific locales.
// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
// You can remove this if you don't use Moment.js:
new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
],
// Some libraries import Node modules but don't use them in the browser.
// Tell Webpack to provide empty mocks for them so importing them works.
node: {
dgram: 'empty',
fs: 'empty',
net: 'empty',
tls: 'empty',
child_process: 'empty',
},
// Turn off performance processing because we utilize
// our own hints via the FileSizeReporter
performance: false,
};