‘use strict‘ const path = require(‘path‘) const utils = require(‘./utils‘) const webpack = require(‘webpack‘) const config = require(‘../config‘) const merge = require(‘webpack-merge‘) const baseWebpackConfig = require(‘./webpack.base.conf‘) //资源拷贝的插件 const CopyWebpackPlugin = require(‘copy-webpack-plugin‘) const htmlWebpackPlugin = require(‘html-webpack-plugin‘) //把css打包成css文件已link的方式引入的包 const ExtractTextPlugin = require(‘extract-text-webpack-plugin‘) //压缩css的包 const OptimizeCSSPlugin = require(‘optimize-css-assets-webpack-plugin‘) //压缩js代码的包 const UglifyJsPlugin = require(‘uglifyjs-webpack-plugin‘) const env = require(‘../config/prod.env‘) const webpackConfig = merge(baseWebpackConfig, { module: { //loader配置,可在介绍utils的文章中查看 rules: utils.styleLoaders({ sourceMap: config.build.productionSourceMap, extract: true, usePostCSS: true }) }, devtool: config.build.productionSourceMap ? config.build.devtool : false, output: { path: config.build.assetsRoot, filename: utils.assetsPath(‘js/[name].[chunkhash].js‘), //chunkFilename用于命名那些异步加载的模块,比如通过require.ensure() chunkFilename: utils.assetsPath(‘js/[id].[chunkhash].js‘) }, plugins: [ // http://vuejs.github.io/vue-loader/en/workflow/production.html //设置全局变量 new webpack.DefinePlugin({ ‘process.env‘: env }), //压缩js代码 new UglifyJsPlugin({ uglifyOptions: { compress: { warnings: false } }, sourceMap: config.build.productionSourceMap, parallel: true }), // 从所有额外的 chunk(additional chunk) 提取(默认情况下,它仅从初Zchunk(initial chunk) 中提取)当使用 CommonsChunkPlugin 并且在公共 chunk 中有提取的 chunk(来自ExtractTextPlugin.extract)时,allChunks **必须设置为 true new ExtractTextPlugin({ filename: utils.assetsPath(‘css/[name].[contenthash].css‘), allChunks: true, }), // 压缩css new OptimizeCSSPlugin({ cssProcessorOptions: config.build.productionSourceMap ? { safe: true, map: { inline: false } } : { safe: true } }), // 在dist目录生成html文件 new HtmlWebpackPlugin({ filename: config.build.index, template: ‘index.html‘, inject: true, minify: { removeComments: true, collapseWhitespace: true, removeAttributeQuotes: true }, chunksSortMode: ‘dependency‘ }), // 该插件会根据模块的相对路径生成一个四位数的hash作为模块id, 建议用于生产环境 new webpack.HashedModuleIdsPlugin(), // 去 webpack 打包时的一个取舍是将 bundle 中各个模块单独打包成闭包。这些打包函数使你的 javascript 在浏览器中处理的更慢。相比之下,一些工具像 Closure Compiler 和 RollupJS 可以提升(hoist)或者预编译所有模块到一个闭包中,提升你的代码在浏览器中的执行速度。 new webpack.optimize.ModuleConcatenationPlugin(), // 将第三方的包分离出来 new webpack.optimize.CommonsChunkPlugin({ name: ‘vendor‘, minChunks (module) { // any required modules inside node_modules are extracted to vendor return ( module.resource && /\.js$/.test(module.resource) && module.resource.indexOf( path.join(__dirname, ‘../node_modules‘) ) === 0 ) } }), // 为了避免每次更改项目代码时导致venderchunk的chunkHash改变,我们还会单独生成一个manifestchunk new webpack.optimize.CommonsChunkPlugin({ name: ‘manifest‘, minChunks: Infinity }), //我们主要逻辑的js文件 new webpack.optimize.CommonsChunkPlugin({ name: ‘app‘, async: ‘vendor-async‘, children: true, minChunks: 3 }), // 拷贝资源 new CopyWebpackPlugin([ { from: path.resolve(__dirname, ‘../static‘), to: config.build.assetsSubDirectory, ignore: [‘.*‘] } ]) ] }) module.exports = webpackConfig