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                    深入浅出 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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                    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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<li class="chapter " data-level="1.6.8" data-path="../4优化/4-8压缩代码.html">
  
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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优化/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优化/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优化/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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<li class="chapter " data-level="1.6.12" data-path="../4优化/4-12按需加载.html">
  
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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优化/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优化/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优化/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优化/4-16优化总结.html">
  
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                    4-16 优化总结
            
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                                <h1 id="2-4-resolve">2-4 Resolve</h1>
<p>Webpack &#x5728;&#x542F;&#x52A8;&#x540E;&#x4F1A;&#x4ECE;&#x914D;&#x7F6E;&#x7684;&#x5165;&#x53E3;&#x6A21;&#x5757;&#x51FA;&#x53D1;&#x627E;&#x51FA;&#x6240;&#x6709;&#x4F9D;&#x8D56;&#x7684;&#x6A21;&#x5757;&#xFF0C;Resolve &#x914D;&#x7F6E; Webpack &#x5982;&#x4F55;&#x5BFB;&#x627E;&#x6A21;&#x5757;&#x6240;&#x5BF9;&#x5E94;&#x7684;&#x6587;&#x4EF6;&#x3002;
Webpack &#x5185;&#x7F6E; JavaScript &#x6A21;&#x5757;&#x5316;&#x8BED;&#x6CD5;&#x89E3;&#x6790;&#x529F;&#x80FD;&#xFF0C;&#x9ED8;&#x8BA4;&#x4F1A;&#x91C7;&#x7528;&#x6A21;&#x5757;&#x5316;&#x6807;&#x51C6;&#x91CC;&#x7EA6;&#x5B9A;&#x597D;&#x7684;&#x89C4;&#x5219;&#x53BB;&#x5BFB;&#x627E;&#xFF0C;&#x4F46;&#x4F60;&#x4E5F;&#x53EF;&#x4EE5;&#x6839;&#x636E;&#x81EA;&#x5DF1;&#x7684;&#x9700;&#x8981;&#x4FEE;&#x6539;&#x9ED8;&#x8BA4;&#x7684;&#x89C4;&#x5219;&#x3002;</p>
<h2 id="alias">alias</h2>
<p><code>resolve.alias</code> &#x914D;&#x7F6E;&#x9879;&#x901A;&#x8FC7;&#x522B;&#x540D;&#x6765;&#x628A;&#x539F;&#x5BFC;&#x5165;&#x8DEF;&#x5F84;&#x6620;&#x5C04;&#x6210;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5BFC;&#x5165;&#x8DEF;&#x5F84;&#x3002;&#x4F8B;&#x5982;&#x4F7F;&#x7528;&#x4EE5;&#x4E0B;&#x914D;&#x7F6E;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-comment">// Webpack alias &#x914D;&#x7F6E;</span>
resolve:{
  alias:{
    components: <span class="hljs-string">&apos;./src/components/&apos;</span>
  }
}
</code></pre>
<p>&#x5F53;&#x4F60;&#x901A;&#x8FC7; <code>import Button from &apos;components/button&apos;</code> &#x5BFC;&#x5165;&#x65F6;&#xFF0C;&#x5B9E;&#x9645;&#x4E0A;&#x88AB; <code>alias</code> &#x7B49;&#x4EF7;&#x66FF;&#x6362;&#x6210;&#x4E86; <code>import Button from &apos;./src/components/button&apos;</code>&#x3002;</p>
<p>&#x4EE5;&#x4E0A; alias &#x914D;&#x7F6E;&#x7684;&#x542B;&#x4E49;&#x662F;&#x628A;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#x91CC;&#x7684; <code>components</code> &#x5173;&#x952E;&#x5B57;&#x66FF;&#x6362;&#x6210; <code>./src/components/</code>&#x3002;</p>
<p>&#x8FD9;&#x6837;&#x505A;&#x53EF;&#x80FD;&#x4F1A;&#x547D;&#x4E2D;&#x592A;&#x591A;&#x7684;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#xFF0C;alias &#x8FD8;&#x652F;&#x6301; <code>$</code> &#x7B26;&#x53F7;&#x6765;&#x7F29;&#x5C0F;&#x8303;&#x56F4;&#x5230;&#x53EA;&#x547D;&#x4E2D;&#x4EE5;&#x5173;&#x952E;&#x5B57;&#x7ED3;&#x5C3E;&#x7684;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#xFF1A;</p>
<pre><code class="lang-js">resolve:{
  alias:{
    <span class="hljs-string">&apos;react$&apos;</span>: <span class="hljs-string">&apos;/path/to/react.min.js&apos;</span>
  }
}
</code></pre>
<p><code>react$</code> &#x53EA;&#x4F1A;&#x547D;&#x4E2D;&#x4EE5; <code>react</code> &#x7ED3;&#x5C3E;&#x7684;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#xFF0C;&#x5373;&#x53EA;&#x4F1A;&#x628A; <code>import &apos;react&apos;</code> &#x5173;&#x952E;&#x5B57;&#x66FF;&#x6362;&#x6210; <code>import &apos;/path/to/react.min.js&apos;</code>&#x3002;</p>
<h2 id="mainfields">mainFields</h2>
<p>&#x6709;&#x4E00;&#x4E9B;&#x7B2C;&#x4E09;&#x65B9;&#x6A21;&#x5757;&#x4F1A;&#x9488;&#x5BF9;&#x4E0D;&#x540C;&#x73AF;&#x5883;&#x63D0;&#x4F9B;&#x51E0;&#x5206;&#x4EE3;&#x7801;&#x3002;
&#x4F8B;&#x5982;&#x5206;&#x522B;&#x63D0;&#x4F9B;&#x91C7;&#x7528; ES5 &#x548C; ES6 &#x7684;2&#x4EFD;&#x4EE3;&#x7801;&#xFF0C;&#x8FD9;2&#x4EFD;&#x4EE3;&#x7801;&#x7684;&#x4F4D;&#x7F6E;&#x5199;&#x5728; <code>package.json</code> &#x6587;&#x4EF6;&#x91CC;&#xFF0C;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-json">{
  <span class="hljs-string">&quot;jsnext:main&quot;</span>: <span class="hljs-string">&quot;es/index.js&quot;</span>,<span class="hljs-comment">// &#x91C7;&#x7528; ES6 &#x8BED;&#x6CD5;&#x7684;&#x4EE3;&#x7801;&#x5165;&#x53E3;&#x6587;&#x4EF6;</span>
  <span class="hljs-string">&quot;main&quot;</span>: <span class="hljs-string">&quot;lib/index.js&quot;</span> <span class="hljs-comment">// &#x91C7;&#x7528; ES5 &#x8BED;&#x6CD5;&#x7684;&#x4EE3;&#x7801;&#x5165;&#x53E3;&#x6587;&#x4EF6;</span>
}
</code></pre>
<p>Webpack &#x4F1A;&#x6839;&#x636E; <code>mainFields</code> &#x7684;&#x914D;&#x7F6E;&#x53BB;&#x51B3;&#x5B9A;&#x4F18;&#x5148;&#x91C7;&#x7528;&#x90A3;&#x4EFD;&#x4EE3;&#x7801;&#xFF0C;<code>mainFields</code> &#x9ED8;&#x8BA4;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js">mainFields: [<span class="hljs-string">&apos;browser&apos;</span>, <span class="hljs-string">&apos;main&apos;</span>]
</code></pre>
<p>Webpack &#x4F1A;&#x6309;&#x7167;&#x6570;&#x7EC4;&#x91CC;&#x7684;&#x987A;&#x5E8F;&#x53BB;<code>package.json</code> &#x6587;&#x4EF6;&#x91CC;&#x5BFB;&#x627E;&#xFF0C;&#x53EA;&#x4F1A;&#x4F7F;&#x7528;&#x627E;&#x5230;&#x7684;&#x7B2C;&#x4E00;&#x4E2A;&#x3002;</p>
<p>&#x5047;&#x5982;&#x4F60;&#x60F3;&#x4F18;&#x5148;&#x91C7;&#x7528; ES6 &#x7684;&#x90A3;&#x4EFD;&#x4EE3;&#x7801;&#xFF0C;&#x53EF;&#x4EE5;&#x8FD9;&#x6837;&#x914D;&#x7F6E;&#xFF1A;</p>
<pre><code class="lang-js">mainFields: [<span class="hljs-string">&apos;jsnext:main&apos;</span>, <span class="hljs-string">&apos;browser&apos;</span>, <span class="hljs-string">&apos;main&apos;</span>]
</code></pre>
<h2 id="extensions">extensions</h2>
<p>&#x5728;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#x6CA1;&#x5E26;&#x6587;&#x4EF6;&#x540E;&#x7F00;&#x65F6;&#xFF0C;Webpack &#x4F1A;&#x81EA;&#x52A8;&#x5E26;&#x4E0A;&#x540E;&#x7F00;&#x540E;&#x53BB;&#x5C1D;&#x8BD5;&#x8BBF;&#x95EE;&#x6587;&#x4EF6;&#x662F;&#x5426;&#x5B58;&#x5728;&#x3002;
<code>resolve.extensions</code> &#x7528;&#x4E8E;&#x914D;&#x7F6E;&#x5728;&#x5C1D;&#x8BD5;&#x8FC7;&#x7A0B;&#x4E2D;&#x7528;&#x5230;&#x7684;&#x540E;&#x7F00;&#x5217;&#x8868;&#xFF0C;&#x9ED8;&#x8BA4;&#x662F;&#xFF1A;</p>
<pre><code class="lang-js">extensions: [<span class="hljs-string">&apos;.js&apos;</span>, <span class="hljs-string">&apos;.json&apos;</span>]
</code></pre>
<p>&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#x5F53;&#x9047;&#x5230; <code>require(&apos;./data&apos;)</code> &#x8FD9;&#x6837;&#x7684;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#x65F6;&#xFF0C;Webpack &#x4F1A;&#x5148;&#x53BB;&#x5BFB;&#x627E; <code>./data.js</code> &#x6587;&#x4EF6;&#xFF0C;&#x5982;&#x679C;&#x8BE5;&#x6587;&#x4EF6;&#x4E0D;&#x5B58;&#x5728;&#x5C31;&#x53BB;&#x5BFB;&#x627E; <code>./data.json</code> &#x6587;&#x4EF6;&#xFF0C;
&#x5982;&#x679C;&#x8FD8;&#x662F;&#x627E;&#x4E0D;&#x5230;&#x5C31;&#x62A5;&#x9519;&#x3002;</p>
<p>&#x5047;&#x5982;&#x4F60;&#x60F3;&#x8BA9; Webpack &#x4F18;&#x5148;&#x4F7F;&#x7528;&#x76EE;&#x5F55;&#x4E0B;&#x7684; TypeScript &#x6587;&#x4EF6;&#xFF0C;&#x53EF;&#x4EE5;&#x8FD9;&#x6837;&#x914D;&#x7F6E;&#xFF1A;</p>
<pre><code class="lang-js">extensions: [<span class="hljs-string">&apos;.ts&apos;</span>, <span class="hljs-string">&apos;.js&apos;</span>, <span class="hljs-string">&apos;.json&apos;</span>]
</code></pre>
<h2 id="modules">modules</h2>
<p><code>resolve.modules</code> &#x914D;&#x7F6E; Webpack &#x53BB;&#x54EA;&#x4E9B;&#x76EE;&#x5F55;&#x4E0B;&#x5BFB;&#x627E;&#x7B2C;&#x4E09;&#x65B9;&#x6A21;&#x5757;&#xFF0C;&#x9ED8;&#x8BA4;&#x662F;&#x53EA;&#x4F1A;&#x53BB; <code>node_modules</code> &#x76EE;&#x5F55;&#x4E0B;&#x5BFB;&#x627E;&#x3002;
&#x6709;&#x65F6;&#x4F60;&#x7684;&#x9879;&#x76EE;&#x91CC;&#x4F1A;&#x6709;&#x4E00;&#x4E9B;&#x6A21;&#x5757;&#x4F1A;&#x5927;&#x91CF;&#x88AB;&#x5176;&#x5B83;&#x6A21;&#x5757;&#x4F9D;&#x8D56;&#x548C;&#x5BFC;&#x5165;&#xFF0C;&#x7531;&#x4E8E;&#x5176;&#x5B83;&#x6A21;&#x5757;&#x7684;&#x4F4D;&#x7F6E;&#x5206;&#x5E03;&#x4E0D;&#x5B9A;&#xFF0C;&#x9488;&#x5BF9;&#x4E0D;&#x540C;&#x7684;&#x6587;&#x4EF6;&#x90FD;&#x8981;&#x53BB;&#x8BA1;&#x7B97;&#x88AB;&#x5BFC;&#x5165;&#x6A21;&#x5757;&#x6587;&#x4EF6;&#x7684;&#x76F8;&#x5BF9;&#x8DEF;&#x5F84;&#xFF0C;
&#x8FD9;&#x4E2A;&#x8DEF;&#x5F84;&#x6709;&#x65F6;&#x5019;&#x4F1A;&#x5F88;&#x957F;&#xFF0C;&#x5C31;&#x50CF;&#x8FD9;&#x6837; <code>import &apos;../../../components/button&apos;</code>
&#x8FD9;&#x65F6;&#x4F60;&#x53EF;&#x4EE5;&#x5229;&#x7528; <code>modules</code> &#x914D;&#x7F6E;&#x9879;&#x4F18;&#x5316;&#xFF0C;&#x5047;&#x5982;&#x90A3;&#x4E9B;&#x88AB;&#x5927;&#x91CF;&#x5BFC;&#x5165;&#x7684;&#x6A21;&#x5757;&#x90FD;&#x5728; <code>./src/components</code> &#x76EE;&#x5F55;&#x4E0B;&#xFF0C;&#x628A; <code>modules</code> &#x914D;&#x7F6E;&#x6210;</p>
<pre><code class="lang-js">modules:[<span class="hljs-string">&apos;./src/components&apos;</span>,<span class="hljs-string">&apos;node_modules&apos;</span>]
</code></pre>
<p>&#x540E;&#xFF0C;&#x4F60;&#x53EF;&#x4EE5;&#x7B80;&#x5355;&#x901A;&#x8FC7; <code>import &apos;button&apos;</code> &#x5BFC;&#x5165;&#x3002;</p>
<h2 id="descriptionfiles">descriptionFiles</h2>
<p><code>resolve.descriptionFiles</code> &#x914D;&#x7F6E;&#x63CF;&#x8FF0;&#x7B2C;&#x4E09;&#x65B9;&#x6A21;&#x5757;&#x7684;&#x6587;&#x4EF6;&#x540D;&#x79F0;&#xFF0C;&#x4E5F;&#x5C31;&#x662F; <code>package.json</code> &#x6587;&#x4EF6;&#x3002;&#x9ED8;&#x8BA4;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js">descriptionFiles: [<span class="hljs-string">&apos;package.json&apos;</span>]
</code></pre>
<h2 id="enforceextension">enforceExtension</h2>
<p><code>resolve.enforceExtension</code> &#x5982;&#x679C;&#x914D;&#x7F6E;&#x4E3A; <code>true</code> &#x6240;&#x6709;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#x90FD;&#x5FC5;&#x987B;&#x8981;&#x5E26;&#x6587;&#x4EF6;&#x540E;&#x7F00;&#xFF0C;
&#x4F8B;&#x5982;&#x5F00;&#x542F;&#x524D; <code>import &apos;./foo&apos;</code> &#x80FD;&#x6B63;&#x5E38;&#x5DE5;&#x4F5C;&#xFF0C;&#x5F00;&#x542F;&#x540E;&#x5C31;&#x5FC5;&#x987B;&#x5199;&#x6210; <code>import &apos;./foo.js&apos;</code>&#x3002;</p>
<h2 id="enforcemoduleextension">enforceModuleExtension</h2>
<p><code>enforceModuleExtension</code> &#x548C; <code>enforceExtension</code> &#x4F5C;&#x7528;&#x7C7B;&#x4F3C;&#xFF0C;&#x4F46; <code>enforceModuleExtension</code> &#x53EA;&#x5BF9; <code>node_modules</code> &#x4E0B;&#x7684;&#x6A21;&#x5757;&#x751F;&#x6548;&#x3002;
<code>enforceModuleExtension</code> &#x901A;&#x5E38;&#x642D;&#x914D; <code>enforceExtension</code> &#x4F7F;&#x7528;&#xFF0C;&#x5728; <code>enforceExtension:true</code> &#x65F6;&#xFF0C;&#x56E0;&#x4E3A;&#x5B89;&#x88C5;&#x7684;&#x7B2C;&#x4E09;&#x65B9;&#x6A21;&#x5757;&#x4E2D;&#x5927;&#x591A;&#x6570;&#x5BFC;&#x5165;&#x8BED;&#x53E5;&#x6CA1;&#x5E26;&#x6587;&#x4EF6;&#x540E;&#x7F00;&#xFF0C;
&#x6240;&#x4EE5;&#x8FD9;&#x65F6;&#x901A;&#x8FC7;&#x914D;&#x7F6E; <code>enforceModuleExtension:false</code> &#x6765;&#x517C;&#x5BB9;&#x7B2C;&#x4E09;&#x65B9;&#x6A21;&#x5757;&#x3002;</p>

                                
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