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dive-into-webpack


			
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                    前言
            
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                    第1章 入门
            
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                    1-1 前端的发展
            
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                    1-2 常见的构建工具及对比
            
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                    1-3 安装与使用
            
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                    1-4 使用 Loader
            
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                    1-5 使用 Plugin
            
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                    1-6 使用 DevServer
            
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                    1-7 核心概念
            
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                    第2章 配置
            
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                    2-1 Entry
            
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                    2-2 Output
            
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                    2-3 Module
            
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                    2-4 Resolve
            
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                    2-5 Plugins
            
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                    2-6 DevServer
            
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                    2-7 其它配置项
            
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                    2-8 整体配置结构
            
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                    2-9 多种配置类型
            
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                    2-10 配置总结
            
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                    第3章 实战
            
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                    3-1 使用 ES6 语言
            
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                    3-2 使用 TypeScript 语言
            
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                    3-3 使用 Flow 检查器
            
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                    3-4 使用 SCSS
            
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                    3-5 使用 PostCSS
            
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                    3-6 使用 React 框架
            
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                    3-7 使用 Vue 框架
            
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                    3-8 使用 Angular2 框架
            
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                    3-9 为单页应用生成 HTML
            
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                    3-10 管理多个单页应用
            
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                    3-11 构建同构应用
            
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                    3-12 构建 Electron 应用
            
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                    3-13 构建 Npm 模块
            
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                    3-14 构建离线应用
            
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                    3-15 搭配 Npm Script
            
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                    3-16 检查代码
            
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                    3-17 通过 Node.js API 启动 Webpack
            
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                    3-18 使用 Webpack Dev Middleware
            
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                    3-19 加载图片
            
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                    3-20 加载SVG
            
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                    3-21 加载 Source Map
            
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                    3-22 实战总结
            
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                    第4章 优化
            
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<li class="chapter " data-level="1.6.1" data-path="4-1缩小文件搜索范围.html">
  
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                    4-1 缩小文件搜索范围
            
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                    4-2 使用 DllPlugin
            
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                    4-3 使用 HappyPack
            
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                    4-4 使用 ParallelUglifyPlugin
            
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                    4-5 使用自动刷新
            
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                    4-6 开启模块热替换
            
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                    4-7 区分环境
            
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                    4-8 压缩代码
            
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<li class="chapter " data-level="1.6.9" data-path="4-9CDN加速.html">
  
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                    4-9 CDN 加速
            
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<li class="chapter " data-level="1.6.10" data-path="4-10使用TreeShaking.html">
  
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                    4-10 使用 Tree Shaking
            
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<li class="chapter " data-level="1.6.11" data-path="4-11提取公共代码.html">
  
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                    4-11 提取公共代码
            
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                    4-12 按需加载
            
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<li class="chapter " data-level="1.6.13" data-path="4-13使用Prepack.html">
  
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                    4-13 使用 Prepack
            
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<li class="chapter " data-level="1.6.14" data-path="4-14开启ScopeHoisting.html">
  
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                    4-14 开启 Scope Hoisting
            
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<li class="chapter " data-level="1.6.15" data-path="4-15输出分析.html">
  
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                    4-15 输出分析
            
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<li class="chapter " data-level="1.6.16" data-path="4-16优化总结.html">
  
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                    4-16 优化总结
            
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                    第5章 原理
            
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                    5-1 工作原理概括
            
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                    5-2 输出文件分析
            
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                    5-3 编写 Loader
            
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                    5-4 编写 Plugin
            
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                    5-5 调试 Webpack
            
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                    5-6 原理总结
            
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                    常用 Loaders
            
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                    常用 Plugins
            
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                    其它 Webpack 学习资源
            
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                                <h1 id="4-12-&#x5206;&#x5272;&#x4EE3;&#x7801;&#x6309;&#x9700;&#x52A0;&#x8F7D;">4-12 &#x5206;&#x5272;&#x4EE3;&#x7801;&#x6309;&#x9700;&#x52A0;&#x8F7D;</h1>
<h2 id="&#x4E3A;&#x4EC0;&#x4E48;&#x9700;&#x8981;&#x6309;&#x9700;&#x52A0;&#x8F7D;">&#x4E3A;&#x4EC0;&#x4E48;&#x9700;&#x8981;&#x6309;&#x9700;&#x52A0;&#x8F7D;</h2>
<p>&#x968F;&#x7740;&#x4E92;&#x8054;&#x7F51;&#x7684;&#x53D1;&#x5C55;&#xFF0C;&#x4E00;&#x4E2A;&#x7F51;&#x9875;&#x9700;&#x8981;&#x627F;&#x8F7D;&#x7684;&#x529F;&#x80FD;&#x8D8A;&#x6765;&#x8D8A;&#x591A;&#x3002;
&#x5BF9;&#x4E8E;&#x91C7;&#x7528;&#x5355;&#x9875;&#x5E94;&#x7528;&#x4F5C;&#x4E3A;&#x524D;&#x7AEF;&#x67B6;&#x6784;&#x7684;&#x7F51;&#x7AD9;&#x6765;&#x8BF4;&#xFF0C;&#x4F1A;&#x9762;&#x4E34;&#x7740;&#x4E00;&#x4E2A;&#x7F51;&#x9875;&#x9700;&#x8981;&#x52A0;&#x8F7D;&#x7684;&#x4EE3;&#x7801;&#x91CF;&#x5F88;&#x5927;&#x7684;&#x95EE;&#x9898;&#xFF0C;&#x56E0;&#x4E3A;&#x8BB8;&#x591A;&#x529F;&#x80FD;&#x90FD;&#x96C6;&#x4E2D;&#x7684;&#x505A;&#x5230;&#x4E86;&#x4E00;&#x4E2A; HTML &#x91CC;&#x3002;
&#x8FD9;&#x4F1A;&#x5BFC;&#x81F4;&#x7F51;&#x9875;&#x52A0;&#x8F7D;&#x7F13;&#x6162;&#x3001;&#x4EA4;&#x4E92;&#x5361;&#x987F;&#xFF0C;&#x7528;&#x6237;&#x4F53;&#x9A8C;&#x5C06;&#x975E;&#x5E38;&#x7CDF;&#x7CD5;&#x3002;</p>
<p>&#x5BFC;&#x81F4;&#x8FD9;&#x4E2A;&#x95EE;&#x9898;&#x7684;&#x6839;&#x672C;&#x539F;&#x56E0;&#x5728;&#x4E8E;&#x4E00;&#x6B21;&#x6027;&#x7684;&#x52A0;&#x8F7D;&#x6240;&#x6709;&#x529F;&#x80FD;&#x5BF9;&#x5E94;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x4F46;&#x5176;&#x5B9E;&#x7528;&#x6237;&#x6BCF;&#x4E00;&#x9636;&#x6BB5;&#x53EA;&#x53EF;&#x80FD;&#x4F7F;&#x7528;&#x5176;&#x4E2D;&#x4E00;&#x90E8;&#x5206;&#x529F;&#x80FD;&#x3002;
&#x6240;&#x4EE5;&#x89E3;&#x51B3;&#x4EE5;&#x4E0A;&#x95EE;&#x9898;&#x7684;&#x65B9;&#x6CD5;&#x5C31;&#x662F;&#x7528;&#x6237;&#x5F53;&#x524D;&#x9700;&#x8981;&#x7528;&#x4EC0;&#x4E48;&#x529F;&#x80FD;&#x5C31;&#x53EA;&#x52A0;&#x8F7D;&#x8FD9;&#x4E2A;&#x529F;&#x80FD;&#x5BF9;&#x5E94;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x6240;&#x8C13;&#x7684;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x3002;</p>
<h2 id="&#x5982;&#x4F55;&#x4F7F;&#x7528;&#x6309;&#x9700;&#x52A0;&#x8F7D;">&#x5982;&#x4F55;&#x4F7F;&#x7528;&#x6309;&#x9700;&#x52A0;&#x8F7D;</h2>
<p>&#x5728;&#x7ED9;&#x5355;&#x9875;&#x5E94;&#x7528;&#x505A;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x4F18;&#x5316;&#x65F6;&#xFF0C;&#x4E00;&#x822C;&#x91C7;&#x7528;&#x4EE5;&#x4E0B;&#x539F;&#x5219;&#xFF1A;</p>
<ul>
<li>&#x628A;&#x6574;&#x4E2A;&#x7F51;&#x7AD9;&#x5212;&#x5206;&#x6210;&#x4E00;&#x4E2A;&#x4E2A;&#x5C0F;&#x529F;&#x80FD;&#xFF0C;&#x518D;&#x6309;&#x7167;&#x6BCF;&#x4E2A;&#x529F;&#x80FD;&#x7684;&#x76F8;&#x5173;&#x7A0B;&#x5EA6;&#x628A;&#x5B83;&#x4EEC;&#x5206;&#x6210;&#x51E0;&#x7C7B;&#x3002;</li>
<li>&#x628A;&#x6BCF;&#x4E00;&#x7C7B;&#x5408;&#x5E76;&#x4E3A;&#x4E00;&#x4E2A; Chunk&#xFF0C;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x5BF9;&#x5E94;&#x7684; Chunk&#x3002;</li>
<li>&#x5BF9;&#x4E8E;&#x7528;&#x6237;&#x9996;&#x6B21;&#x6253;&#x5F00;&#x4F60;&#x7684;&#x7F51;&#x7AD9;&#x65F6;&#x9700;&#x8981;&#x770B;&#x5230;&#x7684;&#x753B;&#x9762;&#x6240;&#x5BF9;&#x5E94;&#x7684;&#x529F;&#x80FD;&#xFF0C;&#x4E0D;&#x8981;&#x5BF9;&#x5B83;&#x4EEC;&#x505A;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#xFF0C;&#x800C;&#x662F;&#x653E;&#x5230;&#x6267;&#x884C;&#x5165;&#x53E3;&#x6240;&#x5728;&#x7684; Chunk &#x4E2D;&#xFF0C;&#x4EE5;&#x964D;&#x4F4E;&#x7528;&#x6237;&#x80FD;&#x611F;&#x77E5;&#x7684;&#x7F51;&#x9875;&#x52A0;&#x8F7D;&#x65F6;&#x95F4;&#x3002;</li>
<li>&#x5BF9;&#x4E8E;&#x4E2A;&#x522B;&#x4F9D;&#x8D56;&#x5927;&#x91CF;&#x4EE3;&#x7801;&#x7684;&#x529F;&#x80FD;&#x70B9;&#xFF0C;&#x4F8B;&#x5982;&#x4F9D;&#x8D56; Chart.js &#x53BB;&#x753B;&#x56FE;&#x8868;&#x3001;&#x4F9D;&#x8D56; flv.js &#x53BB;&#x64AD;&#x653E;&#x89C6;&#x9891;&#x7684;&#x529F;&#x80FD;&#x70B9;&#xFF0C;&#x53EF;&#x518D;&#x5BF9;&#x5176;&#x8FDB;&#x884C;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x3002;</li>
</ul>
<p>&#x88AB;&#x5206;&#x5272;&#x51FA;&#x53BB;&#x7684;&#x4EE3;&#x7801;&#x7684;&#x52A0;&#x8F7D;&#x9700;&#x8981;&#x4E00;&#x5B9A;&#x7684;&#x65F6;&#x673A;&#x53BB;&#x89E6;&#x53D1;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x5F53;&#x7528;&#x6237;&#x64CD;&#x4F5C;&#x5230;&#x4E86;&#x6216;&#x8005;&#x5373;&#x5C06;&#x64CD;&#x4F5C;&#x5230;&#x5BF9;&#x5E94;&#x7684;&#x529F;&#x80FD;&#x65F6;&#x518D;&#x53BB;&#x52A0;&#x8F7D;&#x5BF9;&#x5E94;&#x7684;&#x4EE3;&#x7801;&#x3002;
&#x88AB;&#x5206;&#x5272;&#x51FA;&#x53BB;&#x7684;&#x4EE3;&#x7801;&#x7684;&#x52A0;&#x8F7D;&#x65F6;&#x673A;&#x9700;&#x8981;&#x5F00;&#x53D1;&#x8005;&#x81EA;&#x5DF1;&#x53BB;&#x6839;&#x636E;&#x7F51;&#x9875;&#x7684;&#x9700;&#x6C42;&#x53BB;&#x8861;&#x91CF;&#x548C;&#x786E;&#x5B9A;&#x3002;</p>
<p>&#x7531;&#x4E8E;&#x88AB;&#x5206;&#x5272;&#x51FA;&#x53BB;&#x8FDB;&#x884C;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x7684;&#x4EE3;&#x7801;&#x5728;&#x52A0;&#x8F7D;&#x7684;&#x8FC7;&#x7A0B;&#x4E2D;&#x4E5F;&#x9700;&#x8981;&#x8017;&#x65F6;&#xFF0C;&#x4F60;&#x53EF;&#x4EE5;&#x9884;&#x8A00;&#x7528;&#x6237;&#x63A5;&#x4E0B;&#x6765;&#x53EF;&#x80FD;&#x4F1A;&#x8FDB;&#x884C;&#x7684;&#x64CD;&#x4F5C;&#xFF0C;&#x5E76;&#x63D0;&#x524D;&#x52A0;&#x8F7D;&#x597D;&#x5BF9;&#x5E94;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x4ECE;&#x800C;&#x8BA9;&#x7528;&#x6237;&#x611F;&#x77E5;&#x4E0D;&#x5230;&#x7F51;&#x7EDC;&#x52A0;&#x8F7D;&#x65F6;&#x95F4;&#x3002;</p>
<h2 id="&#x7528;-webpack-&#x5B9E;&#x73B0;&#x6309;&#x9700;&#x52A0;&#x8F7D;">&#x7528; Webpack &#x5B9E;&#x73B0;&#x6309;&#x9700;&#x52A0;&#x8F7D;</h2>
<p>Webpack &#x5185;&#x7F6E;&#x4E86;&#x5F3A;&#x5927;&#x7684;&#x5206;&#x5272;&#x4EE3;&#x7801;&#x7684;&#x529F;&#x80FD;&#x53BB;&#x5B9E;&#x73B0;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#xFF0C;&#x5B9E;&#x73B0;&#x8D77;&#x6765;&#x975E;&#x5E38;&#x7B80;&#x5355;&#x3002;</p>
<p>&#x4E3E;&#x4E2A;&#x4F8B;&#x5B50;&#xFF0C;&#x73B0;&#x5728;&#x9700;&#x8981;&#x505A;&#x8FD9;&#x6837;&#x4E00;&#x4E2A;&#x8FDB;&#x884C;&#x4E86;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x4F18;&#x5316;&#x7684;&#x7F51;&#x9875;&#xFF1A;</p>
<ul>
<li>&#x7F51;&#x9875;&#x9996;&#x6B21;&#x52A0;&#x8F7D;&#x65F6;&#x53EA;&#x52A0;&#x8F7D; <code>main.js</code> &#x6587;&#x4EF6;&#xFF0C;&#x7F51;&#x9875;&#x4F1A;&#x5C55;&#x793A;&#x4E00;&#x4E2A;&#x6309;&#x94AE;&#xFF0C;<code>main.js</code> &#x6587;&#x4EF6;&#x4E2D;&#x53EA;&#x5305;&#x542B;&#x76D1;&#x542C;&#x6309;&#x94AE;&#x4E8B;&#x4EF6;&#x548C;&#x52A0;&#x8F7D;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x7684;&#x4EE3;&#x7801;&#x3002;</li>
<li>&#x5F53;&#x6309;&#x94AE;&#x88AB;&#x70B9;&#x51FB;&#x65F6;&#x624D;&#x53BB;&#x52A0;&#x8F7D;&#x88AB;&#x5206;&#x5272;&#x51FA;&#x53BB;&#x7684; <code>show.js</code> &#x6587;&#x4EF6;&#xFF0C;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#x540E;&#x518D;&#x6267;&#x884C; <code>show.js</code> &#x91CC;&#x7684;&#x51FD;&#x6570;&#x3002;</li>
</ul>
<p>&#x5176;&#x4E2D; <code>main.js</code> &#x6587;&#x4EF6;&#x5185;&#x5BB9;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">window</span>.document.getElementById(<span class="hljs-string">&apos;btn&apos;</span>).addEventListener(<span class="hljs-string">&apos;click&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
  <span class="hljs-comment">// &#x5F53;&#x6309;&#x94AE;&#x88AB;&#x70B9;&#x51FB;&#x540E;&#x624D;&#x53BB;&#x52A0;&#x8F7D; show.js &#x6587;&#x4EF6;&#xFF0C;&#x6587;&#x4EF6;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#x540E;&#x6267;&#x884C;&#x6587;&#x4EF6;&#x5BFC;&#x51FA;&#x7684;&#x51FD;&#x6570;</span>
  <span class="hljs-keyword">import</span>(<span class="hljs-comment">/* webpackChunkName: &quot;show&quot; */</span> <span class="hljs-string">&apos;./show&apos;</span>).then((show) =&gt; {
    show(<span class="hljs-string">&apos;Webpack&apos;</span>);
  })
});
</code></pre>
<p><code>show.js</code> &#x6587;&#x4EF6;&#x5185;&#x5BB9;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">content</span>) </span>{
  <span class="hljs-built_in">window</span>.alert(<span class="hljs-string">&apos;Hello &apos;</span> + content);
};
</code></pre>
<p>&#x4EE3;&#x7801;&#x4E2D;&#x6700;&#x5173;&#x952E;&#x7684;&#x4E00;&#x53E5;&#x662F; <code>import(/* webpackChunkName: &quot;show&quot; */ &apos;./show&apos;)</code>&#xFF0C;Webpack &#x5185;&#x7F6E;&#x4E86;&#x5BF9; <code>import(*)</code> &#x8BED;&#x53E5;&#x7684;&#x652F;&#x6301;&#xFF0C;&#x5F53; Webpack &#x9047;&#x5230;&#x4E86;&#x7C7B;&#x4F3C;&#x7684;&#x8BED;&#x53E5;&#x65F6;&#x4F1A;&#x8FD9;&#x6837;&#x5904;&#x7406;&#xFF1A;</p>
<ul>
<li>&#x4EE5; <code>./show.js</code> &#x4E3A;&#x5165;&#x53E3;&#x65B0;&#x751F;&#x6210;&#x4E00;&#x4E2A; Chunk&#xFF1B;</li>
<li>&#x5F53;&#x4EE3;&#x7801;&#x6267;&#x884C;&#x5230; <code>import</code> &#x6240;&#x5728;&#x8BED;&#x53E5;&#x65F6;&#x624D;&#x4F1A;&#x53BB;&#x52A0;&#x8F7D;&#x7531; Chunk &#x5BF9;&#x5E94;&#x751F;&#x6210;&#x7684;&#x6587;&#x4EF6;&#x3002;</li>
<li><code>import</code> &#x8FD4;&#x56DE;&#x4E00;&#x4E2A; Promise&#xFF0C;&#x5F53;&#x6587;&#x4EF6;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#x65F6;&#x53EF;&#x4EE5;&#x5728; Promise &#x7684; <code>then</code> &#x65B9;&#x6CD5;&#x4E2D;&#x83B7;&#x53D6;&#x5230; <code>show.js</code> &#x5BFC;&#x51FA;&#x7684;&#x5185;&#x5BB9;&#x3002;</li>
</ul>
<blockquote>
<p>&#x5728;&#x4F7F;&#x7528; <code>import()</code> &#x5206;&#x5272;&#x4EE3;&#x7801;&#x540E;&#xFF0C;&#x4F60;&#x7684;&#x6D4F;&#x89C8;&#x5668;&#x5E76;&#x4E14;&#x8981;&#x652F;&#x6301; <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise" target="_blank">Promise API</a> &#x624D;&#x80FD;&#x8BA9;&#x4EE3;&#x7801;&#x6B63;&#x5E38;&#x8FD0;&#x884C;&#xFF0C;
&#x56E0;&#x4E3A; <code>import()</code> &#x8FD4;&#x56DE;&#x4E00;&#x4E2A; Promise&#xFF0C;&#x5B83;&#x4F9D;&#x8D56; Promise&#x3002;&#x5BF9;&#x4E8E;&#x4E0D;&#x539F;&#x751F;&#x652F;&#x6301; Promise &#x7684;&#x6D4F;&#x89C8;&#x5668;&#xFF0C;&#x4F60;&#x53EF;&#x4EE5;&#x6CE8;&#x5165; Promise polyfill&#x3002; </p>
<p><code>/* webpackChunkName: &quot;show&quot; */</code> &#x7684;&#x542B;&#x4E49;&#x662F;&#x4E3A;&#x52A8;&#x6001;&#x751F;&#x6210;&#x7684; Chunk &#x8D4B;&#x4E88;&#x4E00;&#x4E2A;&#x540D;&#x79F0;&#xFF0C;&#x4EE5;&#x65B9;&#x4FBF;&#x6211;&#x4EEC;&#x8FFD;&#x8E2A;&#x548C;&#x8C03;&#x8BD5;&#x4EE3;&#x7801;&#x3002;
&#x5982;&#x679C;&#x4E0D;&#x6307;&#x5B9A;&#x52A8;&#x6001;&#x751F;&#x6210;&#x7684; Chunk &#x7684;&#x540D;&#x79F0;&#xFF0C;&#x9ED8;&#x8BA4;&#x540D;&#x79F0;&#x5C06;&#x4F1A;&#x662F; <code>[id].js</code>&#x3002;
<code>/* webpackChunkName: &quot;show&quot; */</code> &#x662F;&#x5728; Webpack3 &#x4E2D;&#x5F15;&#x5165;&#x7684;&#x65B0;&#x7279;&#x6027;&#xFF0C;&#x5728; Webpack3 &#x4E4B;&#x524D;&#x662F;&#x65E0;&#x6CD5;&#x4E3A;&#x52A8;&#x6001;&#x751F;&#x6210;&#x7684; Chunk &#x8D4B;&#x4E88;&#x540D;&#x79F0;&#x7684;&#x3002;</p>
</blockquote>
<p>&#x4E3A;&#x4E86;&#x6B63;&#x786E;&#x7684;&#x8F93;&#x51FA;&#x5728; <code>/* webpackChunkName: &quot;show&quot; */</code> &#x4E2D;&#x914D;&#x7F6E;&#x7684; ChunkName&#xFF0C;&#x8FD8;&#x9700;&#x8981;&#x914D;&#x7F6E;&#x4E0B; Webpack&#xFF0C;&#x914D;&#x7F6E;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = {
  <span class="hljs-comment">// JS &#x6267;&#x884C;&#x5165;&#x53E3;&#x6587;&#x4EF6;</span>
  entry: {
    main: <span class="hljs-string">&apos;./main.js&apos;</span>,
  },
  output: {
    <span class="hljs-comment">// &#x4E3A;&#x4ECE; entry &#x4E2D;&#x914D;&#x7F6E;&#x751F;&#x6210;&#x7684; Chunk &#x914D;&#x7F6E;&#x8F93;&#x51FA;&#x6587;&#x4EF6;&#x7684;&#x540D;&#x79F0;</span>
    filename: <span class="hljs-string">&apos;[name].js&apos;</span>,
    <span class="hljs-comment">// &#x4E3A;&#x52A8;&#x6001;&#x52A0;&#x8F7D;&#x7684; Chunk &#x914D;&#x7F6E;&#x8F93;&#x51FA;&#x6587;&#x4EF6;&#x7684;&#x540D;&#x79F0;</span>
    chunkFilename: <span class="hljs-string">&apos;[name].js&apos;</span>,
  }
};
</code></pre>
<p>&#x5176;&#x4E2D;&#x6700;&#x5173;&#x952E;&#x7684;&#x4E00;&#x884C;&#x662F; <code>chunkFilename: &apos;[name].js&apos;,</code>&#xFF0C;&#x5B83;&#x4E13;&#x95E8;&#x6307;&#x5B9A;&#x52A8;&#x6001;&#x751F;&#x6210;&#x7684; Chunk &#x5728;&#x8F93;&#x51FA;&#x65F6;&#x7684;&#x6587;&#x4EF6;&#x540D;&#x79F0;&#x3002;
&#x5982;&#x679C;&#x6CA1;&#x6709;&#x8FD9;&#x884C;&#xFF0C;&#x5206;&#x5272;&#x51FA;&#x7684;&#x4EE3;&#x7801;&#x7684;&#x6587;&#x4EF6;&#x540D;&#x79F0;&#x5C06;&#x4F1A;&#x662F; <code>[id].js</code>&#x3002;
chunkFilename &#x5177;&#x4F53;&#x542B;&#x4E49;&#x89C1;<a href="../2&#x914D;&#x7F6E;/2-2Output.html#chunkFilename">2-2 &#x914D;&#x7F6E;-Output</a>&#x3002;</p>
<blockquote>
<p>&#x672C;&#x5B9E;&#x4F8B;<a href="http://webpack.wuhaolin.cn/4-12&#x5206;&#x5272;&#x4EE3;&#x7801;&#x6309;&#x9700;&#x52A0;&#x8F7D;.zip" target="_blank">&#x63D0;&#x4F9B;&#x9879;&#x76EE;&#x5B8C;&#x6574;&#x4EE3;&#x7801;</a></p>
</blockquote>
<h2 id="&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x4E0E;-reactrouter">&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x4E0E; ReactRouter</h2>
<p>&#x5728;&#x5B9E;&#x6218;&#x4E2D;&#xFF0C;&#x4E0D;&#x53EF;&#x80FD;&#x4F1A;&#x6709;&#x4E0A;&#x9762;&#x90A3;&#x4E48;&#x7B80;&#x5355;&#x7684;&#x573A;&#x666F;&#xFF0C;&#x63A5;&#x4E0B;&#x6765;&#x4E3E;&#x4E00;&#x4E2A;&#x5B9E;&#x6218;&#x4E2D;&#x7684;&#x4F8B;&#x5B50;&#xFF1A;&#x5BF9;&#x91C7;&#x7528;&#x4E86; <a href="https://reacttraining.com/react-router/web" target="_blank">ReactRouter</a> &#x7684;&#x5E94;&#x7528;&#x8FDB;&#x884C;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x4F18;&#x5316;&#x3002;
&#x8FD9;&#x4E2A;&#x4F8B;&#x5B50;&#x7531;&#x4E00;&#x4E2A;&#x5355;&#x9875;&#x5E94;&#x7528;&#x6784;&#x6210;&#xFF0C;&#x8FD9;&#x4E2A;&#x5355;&#x9875;&#x5E94;&#x7528;&#x7531;&#x4E24;&#x4E2A;&#x5B50;&#x9875;&#x9762;&#x6784;&#x6210;&#xFF0C;&#x901A;&#x8FC7; ReactRouter &#x5728;&#x4E24;&#x4E2A;&#x5B50;&#x9875;&#x9762;&#x4E4B;&#x95F4;&#x5207;&#x6362;&#x548C;&#x7BA1;&#x7406;&#x8DEF;&#x7531;&#x3002;</p>
<p>&#x8FD9;&#x4E2A;&#x5355;&#x9875;&#x5E94;&#x7528;&#x7684;&#x5165;&#x53E3;&#x6587;&#x4EF6; <code>main.js</code> &#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-keyword">import</span> React, {PureComponent, createElement} <span class="hljs-keyword">from</span> <span class="hljs-string">&apos;react&apos;</span>;
<span class="hljs-keyword">import</span> {render} <span class="hljs-keyword">from</span> <span class="hljs-string">&apos;react-dom&apos;</span>;
<span class="hljs-keyword">import</span> {HashRouter, Route, Link} <span class="hljs-keyword">from</span> <span class="hljs-string">&apos;react-router-dom&apos;</span>;
<span class="hljs-keyword">import</span> PageHome <span class="hljs-keyword">from</span> <span class="hljs-string">&apos;./pages/home&apos;</span>;

<span class="hljs-comment">/**
 * &#x5F02;&#x6B65;&#x52A0;&#x8F7D;&#x7EC4;&#x4EF6;
 * @param load &#x7EC4;&#x4EF6;&#x52A0;&#x8F7D;&#x51FD;&#x6570;&#xFF0C;load &#x51FD;&#x6570;&#x4F1A;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A; Promise&#xFF0C;&#x5728;&#x6587;&#x4EF6;&#x52A0;&#x8F7D;&#x5B8C;&#x6210;&#x65F6; resolve
 * @returns {AsyncComponent} &#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x9AD8;&#x9636;&#x7EC4;&#x4EF6;&#x7528;&#x4E8E;&#x5C01;&#x88C5;&#x9700;&#x8981;&#x5F02;&#x6B65;&#x52A0;&#x8F7D;&#x7684;&#x7EC4;&#x4EF6;
 */</span>
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">getAsyncComponent</span>(<span class="hljs-params">load</span>) </span>{
  <span class="hljs-keyword">return</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">AsyncComponent</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">PureComponent</span> </span>{

    componentDidMount() {
      <span class="hljs-comment">// &#x5728;&#x9AD8;&#x9636;&#x7EC4;&#x4EF6; DidMount &#x65F6;&#x624D;&#x53BB;&#x6267;&#x884C;&#x7F51;&#x7EDC;&#x52A0;&#x8F7D;&#x6B65;&#x9AA4;</span>
      load().then(({<span class="hljs-keyword">default</span>: component}) =&gt; {
        <span class="hljs-comment">// &#x4EE3;&#x7801;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#xFF0C;&#x83B7;&#x53D6;&#x5230;&#x4E86;&#x4EE3;&#x7801;&#x5BFC;&#x51FA;&#x7684;&#x503C;&#xFF0C;&#x8C03;&#x7528; setState &#x901A;&#x77E5;&#x9AD8;&#x9636;&#x7EC4;&#x4EF6;&#x91CD;&#x65B0;&#x6E32;&#x67D3;&#x5B50;&#x7EC4;&#x4EF6;</span>
        <span class="hljs-keyword">this</span>.setState({
          component,
        })
      });
    }

    render() {
      <span class="hljs-keyword">const</span> {component} = <span class="hljs-keyword">this</span>.state || {};
      <span class="hljs-comment">// component &#x662F; React.Component &#x7C7B;&#x578B;&#xFF0C;&#x9700;&#x8981;&#x901A;&#x8FC7; React.createElement &#x751F;&#x4EA7;&#x4E00;&#x4E2A;&#x7EC4;&#x4EF6;&#x5B9E;&#x4F8B;</span>
      <span class="hljs-keyword">return</span> component ? createElement(component) : <span class="hljs-literal">null</span>;
    }
  }
}

<span class="hljs-comment">// &#x6839;&#x7EC4;&#x4EF6;</span>
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">App</span>(<span class="hljs-params"></span>) </span>{
  <span class="hljs-keyword">return</span> (
    &lt;HashRouter&gt;
      &lt;div&gt;
        &lt;nav&gt;
          &lt;Link to=&apos;/&apos;&gt;Home&lt;/Link&gt; | &lt;Link to=&apos;/about&apos;&gt;About&lt;/Link&gt; | &lt;Link to=&apos;/login&apos;&gt;Login&lt;/Link&gt;
        &lt;/nav&gt;
        &lt;hr/&gt;
        &lt;Route exact path=&apos;/&apos; component={PageHome}/&gt;
        &lt;Route path=&apos;/about&apos; component={getAsyncComponent(
          // &#x5F02;&#x6B65;&#x52A0;&#x8F7D;&#x51FD;&#x6570;&#xFF0C;&#x5F02;&#x6B65;&#x5730;&#x52A0;&#x8F7D; PageAbout &#x7EC4;&#x4EF6;
          () =&gt; import(/* webpackChunkName: &apos;page-about&apos; */&apos;./pages/about&apos;)
        )}
        /&gt;
        &lt;Route path=&apos;/login&apos; component={getAsyncComponent(
          // &#x5F02;&#x6B65;&#x52A0;&#x8F7D;&#x51FD;&#x6570;&#xFF0C;&#x5F02;&#x6B65;&#x5730;&#x52A0;&#x8F7D; PageAbout &#x7EC4;&#x4EF6;
          () =&gt; import(/* webpackChunkName: &apos;page-login&apos; */&apos;./pages/login&apos;)
        )}
        /&gt;
      &lt;/div&gt;
    &lt;/HashRouter&gt;
  )
}

// &#x6E32;&#x67D3;&#x6839;&#x7EC4;&#x4EF6;
render(&lt;App/&gt;, window.document.getElementById(&apos;app&apos;));
</code></pre>
<p>&#x4EE5;&#x4E0A;&#x4EE3;&#x7801;&#x4E2D;&#x6700;&#x5173;&#x952E;&#x7684;&#x90E8;&#x5206;&#x662F; <code>getAsyncComponent</code> &#x51FD;&#x6570;&#xFF0C;&#x5B83;&#x7684;&#x4F5C;&#x7528;&#x662F;&#x914D;&#x5408; ReactRouter &#x53BB;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#x7EC4;&#x4EF6;&#xFF0C;&#x5177;&#x4F53;&#x542B;&#x4E49;&#x8BF7;&#x770B;&#x4EE3;&#x7801;&#x4E2D;&#x7684;&#x6CE8;&#x91CA;&#x3002;</p>
<p>&#x7531;&#x4E8E;&#x4EE5;&#x4E0A;&#x6E90;&#x7801;&#x9700;&#x8981;&#x901A;&#x8FC7; Babel &#x53BB;&#x8F6C;&#x6362;&#x540E;&#x624D;&#x80FD;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x4E2D;&#x6B63;&#x5E38;&#x8FD0;&#x884C;&#xFF0C;&#x9700;&#x8981;&#x5728; Webpack &#x4E2D;&#x914D;&#x7F6E;&#x597D;&#x5BF9;&#x5E94;&#x7684; babel-loader&#xFF0C;&#x6E90;&#x7801;&#x5148;&#x4EA4;&#x7ED9; babel-loader &#x5904;&#x7406;&#x540E;&#x518D;&#x4EA4;&#x7ED9; Webpack &#x53BB;&#x5904;&#x7406;&#x5176;&#x4E2D;&#x7684; <code>import(*)</code> &#x8BED;&#x53E5;&#x3002;
&#x4F46;&#x8FD9;&#x6837;&#x505A;&#x540E;&#x4F60;&#x5F88;&#x5FEB;&#x4F1A;&#x53D1;&#x73B0;&#x4E00;&#x4E2A;&#x95EE;&#x9898;&#xFF1A;Babel &#x62A5;&#x51FA;&#x9519;&#x8BEF;&#x8BF4;&#x4E0D;&#x8BA4;&#x8BC6; <code>import(*)</code> &#x8BED;&#x6CD5;&#x3002;
&#x5BFC;&#x81F4;&#x8FD9;&#x4E2A;&#x95EE;&#x9898;&#x7684;&#x539F;&#x56E0;&#x662F; <code>import(*)</code> &#x8BED;&#x6CD5;&#x8FD8;&#x6CA1;&#x6709;&#x88AB;&#x52A0;&#x5165;&#x5230;&#x5728; <a href="../3&#x5B9E;&#x6218;/3-1&#x4F7F;&#x7528;ES6&#x8BED;&#x8A00;.html#Presets">3-1&#x4F7F;&#x7528;ES6&#x8BED;&#x8A00;</a>&#x4E2D;&#x63D0;&#x5230;&#x7684; ECMAScript &#x6807;&#x51C6;&#x4E2D;&#x53BB;&#xFF0C;
&#x4E3A;&#x6B64;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x5B89;&#x88C5;&#x4E00;&#x4E2A; Babel &#x63D2;&#x4EF6; <code>babel-plugin-syntax-dynamic-import</code>&#xFF0C;&#x5E76;&#x4E14;&#x5C06;&#x5176;&#x52A0;&#x5165;&#x5230; <code>.babelrc</code> &#x4E2D;&#x53BB;&#xFF1A;</p>
<pre><code class="lang-json">{
  <span class="hljs-string">&quot;presets&quot;</span>: [
    <span class="hljs-string">&quot;env&quot;</span>,
    <span class="hljs-string">&quot;react&quot;</span>
  ],
  <span class="hljs-string">&quot;plugins&quot;</span>: [
    <span class="hljs-string">&quot;syntax-dynamic-import&quot;</span>
  ]
}
</code></pre>
<p>&#x6267;&#x884C; Webpack &#x6784;&#x5EFA;&#x540E;&#xFF0C;&#x4F60;&#x4F1A;&#x53D1;&#x73B0;&#x8F93;&#x51FA;&#x4E86;&#x4E09;&#x4E2A;&#x6587;&#x4EF6;&#xFF1A;</p>
<ul>
<li><code>main.js</code>&#xFF1A;&#x6267;&#x884C;&#x5165;&#x53E3;&#x6240;&#x5728;&#x7684;&#x4EE3;&#x7801;&#x5757;&#xFF0C;&#x540C;&#x65F6;&#x8FD8;&#x5305;&#x62EC; PageHome &#x6240;&#x9700;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x56E0;&#x4E3A;&#x7528;&#x6237;&#x9996;&#x6B21;&#x6253;&#x5F00;&#x7F51;&#x9875;&#x65F6;&#x5C31;&#x9700;&#x8981;&#x770B;&#x5230; PageHome &#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x6240;&#x4EE5;&#x4E0D;&#x5BF9;&#x5176;&#x8FDB;&#x884C;&#x6309;&#x9700;&#x52A0;&#x8F7D;&#xFF0C;&#x4EE5;&#x964D;&#x4F4E;&#x7528;&#x6237;&#x80FD;&#x611F;&#x77E5;&#x5230;&#x7684;&#x52A0;&#x8F7D;&#x65F6;&#x95F4;&#xFF1B;</li>
<li><code>page-about.js</code>&#xFF1A;&#x5F53;&#x7528;&#x6237;&#x8BBF;&#x95EE; <code>/about</code> &#x65F6;&#x624D;&#x4F1A;&#x52A0;&#x8F7D;&#x7684;&#x4EE3;&#x7801;&#x5757;&#xFF1B;</li>
<li><code>page-login.js</code>&#xFF1A;&#x5F53;&#x7528;&#x6237;&#x8BBF;&#x95EE; <code>/login</code> &#x65F6;&#x624D;&#x4F1A;&#x52A0;&#x8F7D;&#x7684;&#x4EE3;&#x7801;&#x5757;&#x3002;</li>
</ul>
<p>&#x540C;&#x65F6;&#x4F60;&#x8FD8;&#x4F1A;&#x53D1;&#x73B0; <code>page-about.js</code> &#x548C; <code>page-login.js</code> &#x8FD9;&#x4E24;&#x4E2A;&#x6587;&#x4EF6;&#x5728;&#x9996;&#x9875;&#x662F;&#x4E0D;&#x4F1A;&#x52A0;&#x8F7D;&#x7684;&#xFF0C;&#x800C;&#x662F;&#x4F1A;&#x5F53;&#x4F60;&#x5207;&#x6362;&#x5230;&#x4E86;&#x5BF9;&#x5E94;&#x7684;&#x5B50;&#x9875;&#x9762;&#x540E;&#x6587;&#x4EF6;&#x624D;&#x4F1A;&#x5F00;&#x59CB;&#x52A0;&#x8F7D;&#x3002;</p>
<blockquote>
<p>&#x672C;&#x5B9E;&#x4F8B;<a href="http://webpack.wuhaolin.cn/4-12&#x5206;&#x5272;&#x4EE3;&#x7801;&#x6309;&#x9700;&#x52A0;&#x8F7D;ReactRouter.zip" target="_blank">&#x63D0;&#x4F9B;&#x9879;&#x76EE;&#x5B8C;&#x6574;&#x4EE3;&#x7801;</a></p>
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