基于webpack 2.3的标准语法，包含了less变量替换、React组件热加载、第三库单独输出、区分生产与开发环境等常用配置。
'use strict' module.exports = function( env ) { // 生成环境下webpack使用-p参数开启代码压缩 // webpack[-dev-server]使用--env dev参数指定编译环境 var isDev = env == 'dev'; var path = require( 'path' ); var webpack = require( 'webpack' ); var CleanWebpackPlugin = require( 'clean-webpack-plugin' ); var CopyWebpackPlugin = require( 'copy-webpack-plugin' ); var HtmlWebpackPlugin = require( 'html-webpack-plugin' ); var WebkitPrefixer = require( 'autoprefixer' ); var WebpackMd5Hash = require( 'webpack-md5-hash' ); var BundleAnalyzerPlugin = require( 'webpack-bundle-analyzer' ).BundleAnalyzerPlugin; var sourcedir = path.resolve( __dirname, 'src' );// 源码和资源文件的放置位置 var outputdir = path.resolve( __dirname, 'build' );// 编译结果的放置位置 var webContextRoot = '/myreact/';// 应用的实际访问路径，默认是'https://www.jb51.net/' // antd的图标字体文件的实际访问路径，利用less-load的变量替换功能 var antd_fonticon = webContextRoot + 'assets/antd_fonticon/iconfont'; var hasValue = function( item ) { return item != null; }; return { //context: path.resolve( __dirname ), devtool: 'source-map', devServer: { host: '0.0.0.0', port: 8082, historyApiFallback: true }, resolve: { // 让less-loader等插件能找到以~相对定位的资源 modules: [sourcedir, 'node_modules'] }, entry: { main: [ // 编译新版本js的新api(如Promise)，主要是让IE11能够执行编译后的代码 'babel-polyfill', //使用react-hot-loader@3.0.0-beta.6， // 搭配webpack-dev-server --hot命令实现react组件的hot reload isDev ? 'react-hot-loader/patch' : null, path.resolve( sourcedir, 'main.jsx' )].filter( hasValue ), // 第三方库汇总输出 vendor: ['bootstrap/dist/css/bootstrap.min.css', 'react', 'react-dom', 'react-router', 'redux', 'react-redux', 'react-router-redux', 'moment', 'lodash', 'immutable', 'whatwg-fetch', // 只含antd的js部分 'antd', // 各控件还需引入各自的样式文件 'antd/lib/style/index.less'] }, output: { path: outputdir, filename: isDev ? 'js/[name].js' : 'js/[name]_[chunkhash:8].js', // 使用require.ensure造成的延迟加载的代码文件 chunkFilename: isDev ? 'js/chunk_[id]_[name].js' : 'js/chunk_[name]_[chunkhash:8].js', publicPath: webContextRoot }, module: { rules: [{ test: /\.jsx?$/, exclude: /(node_modules|bower_components)/, use: [{ // 编译新版本js语法为低版本js语法 loader: 'babel-loader', options: { presets: [ // 编译es2015版本的js ['babel-preset-es2015', { modules: false }], 'babel-preset-stage-2', // 编译jsx 'babel-preset-react'], plugins: [// 支持热加载react组件 isDev ? 'react-hot-loader/babel' : null, // 减少重复的编译后的辅助方法 'babel-plugin-transform-runtime', // 按需加载组件的代码和样式 ['babel-plugin-import', { libraryName: 'antd', style: true }]].filter( hasValue ) } }] }, { test: /\.css$/, use: ['style-loader', { loader: 'css-loader', options: { // 第三方组件未以module方式引入css，所以不能在全局开启css module modules: false } }, { loader: 'postcss-loader', options: { plugins: [WebkitPrefixer] } }] }, { test: /\.less$/, use: ['style-loader', { loader: 'css-loader', options: { modules: false } }, { loader: 'postcss-loader', options: { plugins: [WebkitPrefixer] } }, { loader: 'less-loader', options: { modules: false, modifyVars: { // 替换antd用到的字体文件路径 "icon-url": JSON.stringify( antd_fonticon ) } } }] }, { test: /\.(jpg|png|gif)$/, use: { loader: 'url-loader', options: { // 编码为dataUrl的最大尺寸 limit: 10000, // 输出路径，相对于publicPath outputPath: 'assets/', name: isDev ? '[name].[ext]' : '[name]_[hash:8].[ext]' } } }, { test: /\.(woff|woff2)(\?v=\d+\.\d+\.\d+)?$/, use: { loader: 'url-loader', options: { limit: 10000, mimetype: 'application/font-woff', outputPath: 'assets/', name: isDev ? '[name].[ext]' : '[name]_[hash:8].[ext]' } } }, { test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/, use: { loader: 'url-loader', options: { limit: 10000, mimetype: 'application/octet-stream', outputPath: 'assets/', name: isDev ? '[name].[ext]' : '[name]_[hash:8].[ext]' } } }, { test: /\.eot(\?v=\d+\.\d+\.\d+)?$/, use: { loader: 'url-loader', options: { limit: 10000, mimetype: 'application/vnd.ms-fontobject', outputPath: 'assets/', name: isDev ? '[name].[ext]' : '[name]_[hash:8].[ext]' } } }, { test: /\.svg(\?v=\d+\.\d+\.\d+)?$/, use: { loader: 'url-loader', options: { limit: 10000, mimetype: 'application/svg+xml', outputPath: 'assets/', name: isDev ? '[name].[ext]' : '[name]_[hash:8].[ext]' } } }] }, plugins: [ // momentjs包含大量本地化代码，需筛选 new webpack.ContextReplacementPlugin( /moment[\/\\]locale$/, /en-ca|zh-cn/ ), new webpack.optimize.OccurrenceOrderPlugin( true ), // 复制无需编译的文件至输出目录 new CopyWebpackPlugin( [{ from: path.resolve( sourcedir, 'assets' ), to: 'assets' }] ), // 修复webpack的chunkhash不以chunk文件实际内容为准的问题 new WebpackMd5Hash(), // 单独打包输出第三方组件，和webpack生成的运行时代码 new webpack.optimize.CommonsChunkPlugin( { name: ['vendor', 'manifest'] }), // 自动填充js、css引用进首页 new HtmlWebpackPlugin( { title: 'wzp react', template: path.resolve( sourcedir, 'index.html' ), inject: 'body' // Inject all scripts into the body }), // 设置环境变量 new webpack.DefinePlugin( { process: { env: { // process.env.NODE_ENV==="production" // 应用代码里，可凭此判断是否运行在生产环境 NODE_ENV: isDev ? JSON.stringify( 'development' ) : JSON.stringify( 'production' ) } } }), // print more readable module names on HMR updates isDev ? new webpack.NamedModulesPlugin() : null, // 先清理输出目录 isDev ? null : new CleanWebpackPlugin( [outputdir] ), // 排除特定库 isDev ? null : new webpack.IgnorePlugin( /.*/, /react-hot-loader$/ ), // 输出报告，查看第三方库的大小 isDev ? null : new BundleAnalyzerPlugin( { analyzerMode: 'static', reportFilename: 'report.html', openAnalyzer: true, generateStatsFile: false }) ].filter( hasValue ) } };