学习Webpack的代码笔记整理

• webpack 4.43.0
• babel 7.10.4

• Base Config: mode/entry/output
• Html: html-webpack-plugin
• Dev Server: webpack-dev-server
• Css
  • Base: css-loader style-loader
  • Less/Sass: less-loader sass-loader
  • Seperate Css File: mini-css-extract-plugin
  • Browser Prefix: postcss-loader autoprefixer
  • Compress: optimize-css-assets-webpack-plugin

Demo1 Notes

• JS
  • ES6/ES7 -> ES5: babel-loader (presets/plugins/runtime/polyfill)
  • Format: eslint-loader
  • Global Variable: expose-loader webpack.ProvidePlugin CDN(externals)
• Images
  • JS/CSS: file-loader/url-loader
  • HTML: file-loader/url-loader + html-withimg-loader

Demo2 Notes

• Multiple Entries
  • JS: output--filename ([name].js)
  • HTML: html-webpack-plugin (chunks)
• Little Plugins
  • clean-webpack-plugin
  • copy-webpack-plugin
  • buidin: webpack.BannerPlugin
• Webpack Propertis
  • devtool: Source Map
  • watch watchOptions: Auto Rebuild
  • resolve: Resolve Modules
• Cross Origin
  • proxy
  • before(app)(mock)
  • webpack-dev-middleware
• Environment
  • Env Variables: webpack.DefinePlugin
  • Split Config: webpack-merge

Demo3 Notes

• optimization
  • noParse: noParse: /jquery|lodash/
  • IgnorePlugin: new webpack.IgnorePlugin(/\.\/locale/, /moment/)
  • Dll: webpack.DllPlugin webpack.DllReferencePlugin
  • Multiple Threads Pack: happypack
  • Buildin: tree-shaking, scope hosting
  • Common Codes(Multiple Entries): splitChunks
  • Lazy Load: import('xxx').then(data => console.log(data.default));
  • HMR: webpack.HotModuleReplacementPlugin webpack.NamedModulesPlugin module.hot.accept()

Demo4 Notes

• tapable
  • Sync: SyncHook SyncBailHook SyncWaterfallHook SyncLoopHook
  • Async: AsyncParallelHook(AsyncParallelBailHook) AsyncSeriesHook(AsyncSeriesBailHook) AsyncSeriesWaterfallHook

• write a simple webpack
  • bin project - my-webpack: fs path AST(babylon @babel/types @babel/traverse @babel/generator) tapable ejs
  • test project: write loaders(style-loader less-loader), write plugins(tapable)

    # bin project
    npm link

    # test project
    npm link my-webpack
    npx my-webpack