主要就是根据不同的策略来分割打包出来的bundle。
本人项目中splitChunks配置如下:
module.exports = { chainWebpack(config) { config.when(process.env.NODE_ENV != "development", config => { config.optimization.splitChunks({ chunks: "all", cacheGroups: { // 第三方组件 libs: { 指定chunks名称 name: "chunk-libs", //符合组的要求就给构建venders test: /[\\/]node_modules[\\/]/, //priority:优先级:数字越大优先级越高,因为默认值为0,所以自定义的一般是负数形式,决定cacheGroups中相同条件下每个组执行的优先顺序。 priority: 10, // 仅限于最初依赖的第三方 chunks: "initial" }, elementUI: { // 将elementUI拆分为单个包 name: "chunk-elementUI", // 重量需要大于libs和app,否则将打包到libs或app中 priority: 20, // 为了适应cnpm test: /[\\/]node_modules[\\/]_?element-ui(.*)/ }, //公共组件 commons: { name: "chunk-commons", // can customize your rules test: resolve("src/components"), minChunks: 3, priority: 30, //这个的作用是当前的chunk如果包含了从main里面分离出来的模块,则重用这个模块,这样的问题是会影响chunk的名称。 reuseExistingChunk: true, //最大初始化加载次数,一个入口文件可以并行加载的最大文件数量,默认3 maxInitialRequests: 3, //表示在分离前的最小模块大小,默认为0,最小为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
npm i --save-dev webpack-bundle-analyzer
config.plugin("BundleAnalyzerPlugin").use(BundleAnalyzerPlugin).tap(() => [ { rel: "BundleAnalyzerPlugin", analyzerMode: "server", // "server": 启动端口服务;"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 }
运行
npm run build 或者 npm run dev
访问
http://127.0.0.1:8877
分析现状
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