webpack中的optimization怎么配置

本篇內容主要講解“webpack中的optimization怎么配置”，感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷，實用性強。下面就讓小編來帶大家學習“webpack中的optimization怎么配置”吧!

webpack配置optimization

• minimizer

• runtimeChunk

• noEmitOnErrors

• splitChunks

主要就是根據不同的策略來分割打包出來的bundle。

本人項目中splitChunks配置如下：

module.exports = {
                    chainWebpack(config) {
                        config.when(process.env.NODE_ENV != 'development',
                            config => {
                                config.optimization.splitChunks({
                                    chunks: 'all',
                                    cacheGroups: {
                                        // 第三方組件
                                        libs: {
                                            指定chunks名稱
                                            name: 'chunk-libs',
                                            //符合組的要求就給構建venders
                                            test: /[\\/]node_modules[\\/]/,
                                            //priority:優先級：數字越大優先級越高，因為默認值為0，所以自定義的一般是負數形式,決定cacheGroups中相同條件下每個組執行的優先順序。
                                            priority: 10,
                                            // 僅限于最初依賴的第三方
                                            chunks: 'initial'
                                        },
                                        elementUI: {
                                            // 將elementUI拆分為單個包
                                            name: 'chunk-elementUI',
                                            // 重量需要大于libs和app，否則將打包到libs或app中
                                            priority: 20,
                                            // 為了適應cnpm
                                            test: /[\\/]node_modules[\\/]_?element-ui(.*)/
                                        },
                                        //公共組件
                                        commons: {
                                            name: 'chunk-commons',
                                            // can customize your rules
                                            test: resolve('src/components'),
                                            minChunks: 3,
                                            priority: 30,
                                            //這個的作用是當前的chunk如果包含了從main里面分離出來的模塊，則重用這個模塊，這樣的問題是會影響chunk的名稱。
                                            reuseExistingChunk: true,
                                            //最大初始化加載次數，一個入口文件可以并行加載的最大文件數量，默認3
                                            maxInitialRequests: 3,
                                            //表示在分離前的最小模塊大小，默認為0，最小為30000
                                            minSize: 0
                                        },
                                        echarts: { // split echarts libs
                                            name: 'chunk-echarts',
                                            test: /[\\/]node_modules[\\/]_?echarts(.*)/,
                                            priority: 40,
                                            chunks: 'async',
                                            reuseExistingChunk: true
                                        },
                                        monaco: { // split monaco libs
                                            name: 'chunk-monaco',
                                            test: /[\\/]node_modules[\\/]_?monaco(.*)/,
                                            priority: 40,
                                            chunks: 'async',
                                            reuseExistingChunk: true
                                        },
                                        'project-components': { // split project libs
                                            name: 'chunk-project-components',
                                            test: resolve('src/views/project'),
                                            priority: 50,
                                            chunks: 'async',
                                            reuseExistingChunk: true
                                        },
                                        'teachers-components': { // split teacher libs
                                            name: 'chunk-teachers-components',
                                            test: resolve('src/views/teachers'),
                                            priority: 60,
                                            chunks: 'async',
                                            reuseExistingChunk: true
                                        },
                                        'utils': { // split utils libs
                                            name: 'chunk-utils',
                                            test: resolve('src/utils'),
                                            priority: 70,
                                            chunks: 'async',
                                            reuseExistingChunk: true
                                        },
                                    }
                                })
                            })

                    }
                }

分析工具：webpack-bundle-analyzer

• 安裝

npm i --save-dev webpack-bundle-analyzer

• 配置

 config.plugin('BundleAnalyzerPlugin').use(BundleAnalyzerPlugin).tap(() => [
      {
        rel: 'BundleAnalyzerPlugin',
        analyzerMode: 'server', // 'server': 啟動端口服務；'static': 生成 report.html；'disabled': 配合 generateStatsFile 使用；
        generateStatsFile: false, // 是否生成stats.json文件
        analyzerHost: '127.0.0.1',
        analyzerPort: '8667',
        reportFilename: 'report.html',
        defaultSizes: 'parsed',
        openAnalyzer: false,
        statsFilename: 'stats.json',
        statsOptions: null,
        excludeAssets: null
      }

運行

npm run build 或者 npm run dev

訪問

http://127.0.0.1:8877

擴展：webpack中module package bundle chunk詳細講解

• module 模塊 寫一個commonjs 或者amd規范的包就叫module

• package 是所有module構成的，它是一個整體的概念，整個項目就是一個package，它可能是commonjs或者amd規范的包

• bundle是webpack打包的結果 所有的module都打包成一個文件 （module集合）

• chunk bundle是入口bundle,異步加載一個模塊，是需要運行時去處理的，獲取的過程就是一個代碼塊即chunk;由bundle獲取的包為chunk

到此，相信大家對“webpack中的optimization怎么配置”有了更深的了解，不妨來實際操作一番吧！這里是億速云網站，更多相關內容可以進入相關頻道進行查詢，關注我們，繼續學習！