问题描述
我使用 CRA 创建了一个应用程序，但将其更新为使用 webpack5，因此我必须对 webpack.config 进行一些修改以支持其更改。
现在，我可以在没有任何重大错误的情况下安装服务器（请参阅下面的注释），但是当我打开 localhost:3001 时，我在外部库中得到 ReferenceError: require is not defined（我知道它在其他库中有效）使用 webpack4 打包）。
这是我的 webpack.config.js
'use strict';
/* eslint-disable @typescript-eslint/no-var-requires */
const fs = require('fs');
const path = require('path');
const webpack = require('webpack');
const PnpWebpackPlugin = require('pnp-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const InlineChunkHtmlPlugin = require('react-dev-utils/InlineChunkHtmlPlugin');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const safePostCssparser = require('postcss-safe-parser');
const { WebpackManifestPlugin } = require('webpack-manifest-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const WorkBoxWebpackPlugin = require('workBox-webpack-plugin');
const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
const getCSSModuleLocalIdent = require('react-dev-utils/getCSSModuleLocalIdent');
const paths = require('./paths');
const modules = require('./modules');
const getClientEnvironment = require('./env');
const ModuleNotFoundplugin = require('react-dev-utils/ModuleNotFoundplugin');
const ForkTsCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin');
const typescriptFormatter = require('react-dev-utils/typescriptFormatter');
const SriPlugin = require('webpack-subresource-integrity');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
// Source maps are resource heavy and can cause out of memory issue for large source files.
const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP === 'true';
// Some apps do not need the benefits of saving a web request,so not inlining the chunk
// makes for a smoother build process.
const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false';
// Check if TypeScript is setup
const useTypeScript = fs.existsSync(paths.appTsConfig);
// style files regexes
const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;
const reactRefreshOverlayEntry = require.resolve(
'react-dev-utils/refreshOverlayInterop'
);
// This is the production and development configuration.
// It is focused on developer experience,fast rebuilds,and a minimal bundle.
module.exports = function (webpackEnv) {
const isEnvDevelopment = webpackEnv === 'development';
const isEnvProduction = webpackEnv === 'production';
// Webpack uses `publicPath` to determine where the app is being served from.
// It requires a trailing slash,or the file assets will get an incorrect path.
// In development,we always serve from the root. This makes config easier.
const publicPath = isEnvProduction
? paths.servedpath
: isEnvDevelopment && '/';
// Some apps do not use client-side routing with pushState.
// For these,"homepage" can be set to "." to enable relative asset paths.
const shouldUseRelativeAssetPaths = publicPath === './';
// `publicUrl` is just like `publicPath`,but we will provide it to our app
// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
const publicUrl = isEnvProduction
? publicPath.slice(0,-1)
: isEnvDevelopment && '';
// Get environment variables to inject into our app.
const env = getClientEnvironment(publicUrl);
// common function to get style loaders
const getStyleLoaders = (cssOptions,preProcessor) => {
const loaders = [
isEnvDevelopment && require.resolve('style-loader'),isEnvProduction && {
loader: MiniCssExtractPlugin.loader,options: Object.assign({},shouldUseRelativeAssetPaths ? { publicPath: './' } : undefined)
},{
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: {
postcssOptions: {
plugins: [
require('postcss-flexbugs-fixes'),require('postcss-preset-env')({
autoprefixer: {
flexBox: 'no-2009',stage: 3,}),]
},sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,].filter(Boolean);
if (preProcessor) {
loaders.push({
loader: require.resolve(preProcessor),options: {
sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,});
}
return loaders;
};
return {
mode: isEnvProduction ? 'production' : isEnvDevelopment && 'development',// Stop compilation early in production
bail: isEnvProduction,devtool: isEnvProduction
? shouldUseSourceMap
? 'source-map'
: false
: isEnvDevelopment && 'eval-source-map',// These are the "entry points" to our application.
// This means they will be the "root" imports that are included in JS bundle.
entry: [
// Include an alternative client for WebpackDevServer. A client's job is to
// connect to WebpackDevServer by a socket and get notified about changes.
// When you save a file,the client will either apply hot updates (in case
// of CSS changes),or refresh the page (in case of JS changes). When you
// make a Syntax error,this client will display a Syntax error overlay.
// Note: instead of the default WebpackDevServer client,we use a custom one
// to bring better experience for Create React App users. You can replace
// the line below with these two lines if you prefer the stock client:
// require.resolve('webpack-dev-server/client') + '?/',// require.resolve('webpack/hot/dev-server'),isEnvDevelopment
&& require.resolve('react-dev-utils/webpackHotDevClient'),// Finally,this is your app's code:
paths.appIndexJs,// We include the app code last so that if there is a runtime error during
// initialization,it doesn't blow up the WebpackDevServer client,and
// changing JS code would still trigger a refresh.
].filter(Boolean),output: {
libraryTarget: 'commonjs2',// The build folder.
path: isEnvProduction ? paths.appBuild : __dirname,// Add /* filename */ comments to generated require()s in the output.
pathinfo: isEnvDevelopment,// There will be one main bundle,and one file per asynchronous chunk.
// In development,it does not produce real files.
filename: 'static/js/[name].[chunkhash:8].js',// There are also additional JS chunk files if you use code splitting.
chunkFilename: isEnvProduction
? 'static/js/[name].[chunkhash:8].chunk.js'
: isEnvDevelopment && 'static/js/[name].chunk.js',// We inferred the "public path" (such as / or /my-project) from homepage.
// We use "/" in development.
publicPath: publicPath,// Point sourcemap entries to original disk location (format as URL on Windows)
devtoolmodulefilenameTemplate: isEnvProduction
? (info) =>
path
.relative(paths.appSrc,info.absoluteResourcePath)
.replace(/\\/g,'/')
: isEnvDevelopment
&& ((info) => path.resolve(info.absoluteResourcePath).replace(/\\/g,'/')),crossOriginLoading: 'anonymous'
},optimization: {
minimize: isEnvProduction,minimizer: [
() => {
// This is only used in production mode
new TerserPlugin({
terserOptions: {
parse: {
// we want terser to parse ecma 8 code. However,we don't want it
// to apply any 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,// disabled because of an issue with Terser breaking valid code:
// https://github.com/facebook/create-react-app/issues/5250
// Pending futher investigation:
// https://github.com/terser-js/terser/issues/120
inline: 2,mangle: {
safari10: true,output: {
ecma: 5,comments: false,// Turned on because emoji and regex is not minified properly using default
// https://github.com/facebook/create-react-app/issues/2488
'ascii_only': true,// 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,});
},// This is only used in production mode
new OptimizeCSSAssetsPlugin({
cssprocessorOptions: {
parser: safePostCssparser,map: shouldUseSourceMap
? {
// `inline: false` forces the sourcemap to be output into a
// separate file
inline: false,// `annotation: true` appends the sourceMappingURL to the end of
// the css file,helping the browser find the sourcemap
annotation: true,}
: false,],// Automatically split vendor and commons
// https://twitter.com/wSokra/status/969633336732905474
// https://medium.com/webpack/webpack-4-code-splitting-chunk-graph-and-the-splitchunks-optimization-be739a861366
splitChunks: {
chunks: 'all',name: false,// Keep the runtime chunk separated to enable long term caching
// https://twitter.com/wSokra/status/969679223278505985
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',paths.appNodeModules].concat(
modules.additionalModulePaths || []
),// These are the reasonable defaults supported by the Node ecosystem.
// We also include JSX as a common component filename extension to support
// some tools,although we do not recommend using it,see:
// https://github.com/facebook/create-react-app/issues/290
// `web` extension prefixes have been added for better support
// for React Native Web.
extensions: paths.modulefileExtensions
.map((ext) => `.${ext}`)
.filter((ext) => useTypeScript || !ext.includes('ts')),alias: {
// Support React Native Web
// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
// 'react-native': 'react-native-web',plugins: [
// Adds support for installing with Plug'n'Play,leading to faster installs and adding
// guards against forgotten dependencies and such.
PnpWebpackPlugin,// Prevents users from importing files from outside of src/ (or node_modules/).
// This often causes confusion because we only process files within src/ with babel.
// To fix this,we prevent you from importing files out of src/ -- if you'd like to,// please link the files into your node_modules/ and let module-resolution kick in.
// Make sure your source files are compiled,as they will not be processed in any way.
new ModuleScopePlugin(paths.appSrc,[
paths.appPackageJson,reactRefreshOverlayEntry,]),symlinks: false,// Some libraries import Node modules but don't use them in the browser.
// Tell Webpack to provide empty mocks for them so importing them works.
fallback: {
path: false
},resolveLoader: {
plugins: [
// Also related to Plug'n'Play,but this time it tells Webpack to load its loaders
// from the current package.
PnpWebpackPlugin.moduleLoader(module),module: {
strictExportPresence: true,rules: [
{
// "oneOf" will traverse all following loaders until one will
// match the requirements. When no loader matches it will fall
// back to the "file" loader at the end of the loader list.
oneOf: [
// "url" loader works like "file" loader except that it embeds assets
// smaller than specified limit in bytes as data URLs to avoid requests.
// A missing `test` is equivalent to a match.
{
test: [/\.bmp$/,/\.gif$/,/\.jpe?g$/,/\.png$/,/\.mp?g$/],loader: require.resolve('url-loader'),options: {
limit: 10000,name: 'static/media/[name].[hash:8].[ext]',{
test: [/\.(ogg|mp3|wav|mpe?g)$/i],loader: require.resolve('file-loader'),options: {
name: '[name].[hash:8].[ext]',outputPath: 'static/media/'
},{
test: /\.(woff|woff2|eot|ttf|otf|svg)$/,options: {
name: '[name].[ext]',outputPath: 'fonts/'
}
},// Process application JS with Babel.
// The preset includes JSX,Flow,TypeScript,and some ESnext features.
{
test: /\.(js|mjs|jsx|ts|tsx)$/,include: paths.appSrc,loader: require.resolve('babel-loader'),options: {
customize: require.resolve(
'babel-preset-react-app/webpack-overrides'
),presets: [
[
require.resolve('babel-preset-react-app'),{
runtime: 'classic'
// runtime: hasJsxRuntime ? 'automatic' : 'classic',plugins: [
[
require.resolve('babel-plugin-named-asset-import'),{
loaderMap: {
svg: {
ReactComponent: '@svgr/webpack?-svgo![path]',// This is a feature of `babel-loader` for webpack (not Babel itself).
// It enables caching results in ./node_modules/.cache/babel-loader/
// directory for faster rebuilds.
cacheDirectory: false,cacheCompression: isEnvProduction,compact: isEnvProduction,// Process any JS outside of the app with Babel.
// Unlike the application JS,we only compile the standard ES features.
{
test: /\.(js|mjs)$/,exclude: /@babel(?:\/|\\{1,2})runtime/,options: {
babelrc: false,configFile: false,compact: false,presets: [
[
require.resolve('babel-preset-react-app/dependencies'),{ helpers: true },cacheDirectory: true,// If an error happens in a package,it's possible to be
// because it was compiled. Thus,we don't want the browser
// debugger to show the original code. Instead,the code
// being evaluated would be much more helpful.
sourceMaps: false,// "postcss" loader applies autoprefixer to our CSS.
// "css" loader resolves paths in CSS and adds assets as dependencies.
// "style" loader turns CSS into JS modules that inject <style> tags.
// In production,we use MiniCSSExtractPlugin to extract that CSS
// to a file,but in development "style" loader enables hot editing
// of CSS.
// By default we support CSS Modules with the extension .module.css
{
test: cssRegex,exclude: cssModuleRegex,use: getStyleLoaders({
importLoaders: 1,sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,// Don't consider CSS imports dead code even if the
// containing package claims to have no side effects.
// Remove this when webpack adds a warning or an error for this.
// See https://github.com/webpack/webpack/issues/6571
sideEffects: true,// Adds support for CSS Modules (https://github.com/css-modules/css-modules)
// using the extension .module.css
{
test: cssModuleRegex,modules: true,getLocalIdent: getCSSModuleLocalIdent,// Opt-in support for SASS (using .scss or .sass extensions).
// By default we support SASS Modules with the
// extensions .module.scss or .module.sass
{
test: sassRegex,exclude: sassModuleRegex,use: getStyleLoaders(
{
importLoaders: 2,sourceMap: isEnvProduction
? shouldUseSourceMap
: isEnvDevelopment,'sass-loader'
),// Adds support for CSS Modules,but using SASS
// using the extension .module.scss or .module.sass
{
test: sassModuleRegex,// "file" loader makes sure those assets get served by WebpackDevServer.
// When you `import` an asset,you get its (virtual) filename.
// In production,they would get copied to the `build` folder.
// This loader doesn't use a "test" so it will catch all modules
// that fall through the other loaders.
{
loader: require.resolve('file-loader'),include: [path.resolve(__dirname,'./assets')],// Exclude `js` files to keep "css" loader working as it injects
// its runtime that would otherwise be processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.(js|mjs|jsx|ts|tsx)$/,/\.html$/,/\.json$/],options: {
name: 'static/media/[name].[hash:8].[ext]',// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
],plugins: [
// Generates an `index.html` file with the <script> injected.
new HtmlWebpackPlugin(
Object.assign(
{},{
inject: true,template: paths.appHtml,isEnvProduction
? {
minify: {
removeComments: true,collapseWhitespace: true,removeRedundantAttributes: true,useShortDoctype: true,removeEmptyAttributes: true,removeStyleLinkTypeAttributes: true,keepClosingSlash: true,minifyJS: true,minifyCSS: true,minifyURLs: true,}
}
: undefined
)
),new SriPlugin({
hashFuncNames: ['sha256','sha384'],enabled: isEnvProduction
}),// Inlines the webpack runtime script. This script is too small to warrant
// a network request.
isEnvProduction
&& shouldInlineRuntimeChunk
&& new InlineChunkHtmlPlugin(HtmlWebpackPlugin,[/runtime~.+[.]js/]),// Makes some environment variables available in index.html.
// The public URL is available as %PUBLIC_URL% in index.html,e.g.:
// <link rel="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.
// In development,this will be an empty string.
new InterpolateHtmlPlugin(HtmlWebpackPlugin,env.raw),// This gives some necessary context to module not found errors,such as
// the requesting resource.
new ModuleNotFoundplugin(paths.appPath),// Makes some environment variables available to the JS code,for example:
// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
// It is absolutely essential that NODE_ENV is set to production
// during a production build.
// Otherwise React will be compiled in the very slow development mode.
new webpack.DefinePlugin(env.stringified),// This is necessary to emit hot updates (currently CSS only):
isEnvDevelopment && new webpack.HotModuleReplacementPlugin(),// Watcher doesn't work well if you mistype casing in a path so we use
// a plugin that prints an error when you attempt to do this.
// See https://github.com/facebook/create-react-app/issues/240
isEnvDevelopment && new CaseSensitivePathsPlugin(),// If you require a missing module and then `npm install` it,you still have
// to restart the development server for Webpack to discover it. This plugin
// makes the discovery automatic so you don't have to restart.
// See https://github.com/facebook/create-react-app/issues/186
isEnvDevelopment
&& new WatchMissingNodeModulesPlugin(paths.appNodeModules),isEnvProduction
&& new MiniCssExtractPlugin({
// Options similar to the same options in webpackOptions.output
// both options are optional
filename: 'static/css/[name].[contenthash:8].css',chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',// Generate 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 WebpackManifestPlugin({
fileName: 'asset-manifest.json',publicPath: publicPath,// Moment.js is an extremely popular library that bundles large locale files
// by default due to how Webpack interprets its code. This is a practical
// solution that requires the user to opt into importing specific locales.
// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
// You can remove this if you don't use Moment.js:
new webpack.IgnorePlugin(/^\.\/locale$/,/moment$/),// Generate a service worker script that will precache,and keep up to date,// the HTML & assets that are part of the Webpack build.
isEnvProduction
&& new WorkBoxWebpackPlugin.GenerateSW({
clientsClaim: true,exclude: [/\.map$/,/asset-manifest\.json$/],importWorkBoxFrom: 'cdn',navigateFallback: publicUrl + '/index.html',navigateFallbackBlacklist: [
// Exclude URLs starting with /_,as they're likely an API call
new RegExp('^/_'),// Exclude URLs containing a dot,as they're likely a resource in
// public/ and not a SPA route
new RegExp('/[^/]+\\.[^/]+$'),// TypeScript type checking in dev
useTypeScript && !isEnvProduction
&& new ForkTsCheckerWebpackPlugin({
typescript: {
configFile: '../'
},async: true,issue: {
include: [
{ file: '**' },exclude: [
{ file: '**/*.json' },{ file: '**/__tests__/**' },{ file: '**/?(*.)(spec|test).*' },{ file: '**/src/setupProxy.*' },{ file: '**/src/setupTests.*' },]
},logger: {
infrastructure: 'silent',issues: 'console',devServer: true
},formatter: typescriptFormatter,].filter(Boolean),// Turn off performance processing because we utilize
// our own hints via the FileSizeReporter
performance: false,};
};
这是我的 babelrc（不过不确定这是否与错误有关）
{
"presets": [
"react-app",[
"@babel/preset-env",{
"loose": true
}
],"@babel/preset-react","@babel/preset-typescript"
],"plugins": [
[
"module-resolver",{
"root": ["./src"]
}
],["@babel/plugin-transform-modules-commonjs"],["@babel/plugin-proposal-private-methods",{ "loose": false }],"@babel/proposal-class-properties","@babel/plugin-transform-runtime","babel-plugin-styled-components"
],}
关于我可以做些什么的任何想法？
注意：另外，不确定它是否相关，但是当我安装服务器时，我可以看到：
解决方法
试试这个。
[
"@babel/plugin-transform-runtime",{
useESModules: false,}
],