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dive-into-webpack-bak


			
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                    深入浅出 Webpack
            
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                    前言
            
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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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<li class="chapter " data-level="1.6.7" data-path="../4优化/4-7区分环境.html">
  
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                    4-7 区分环境
            
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                    4-8 压缩代码
            
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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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<li class="chapter " data-level="1.7" data-path="../5原理/">
  
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                    第5章 原理
            
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                                <h1 id="3-5-&#x4F7F;&#x7528;-postcss">3-5 &#x4F7F;&#x7528; PostCSS</h1>
<h2 id="&#x8BA4;&#x8BC6;-postcss">&#x8BA4;&#x8BC6; PostCSS</h2>
<p><a href="http://postcss.org" target="_blank">PostCSS</a> &#x662F;&#x4E00;&#x4E2A; CSS &#x5904;&#x7406;&#x5DE5;&#x5177;&#xFF0C;&#x548C; SCSS &#x4E0D;&#x540C;&#x7684;&#x5730;&#x65B9;&#x5728;&#x4E8E;&#x5B83;&#x901A;&#x8FC7;&#x63D2;&#x4EF6;&#x673A;&#x5236;&#x53EF;&#x4EE5;&#x7075;&#x6D3B;&#x7684;&#x6269;&#x5C55;&#x5176;&#x652F;&#x6301;&#x7684;&#x7279;&#x6027;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x50CF; SCSS &#x90A3;&#x6837;&#x8BED;&#x6CD5;&#x662F;&#x56FA;&#x5B9A;&#x7684;&#x3002;
PostCSS &#x7684;&#x7528;&#x5904;&#x975E;&#x5E38;&#x591A;&#xFF0C;&#x5305;&#x62EC;&#x7ED9; CSS &#x81EA;&#x52A8;&#x52A0;&#x524D;&#x7F00;&#x3001;&#x4F7F;&#x7528;&#x4E0B;&#x4E00;&#x4EE3; CSS &#x8BED;&#x6CD5;&#x7B49;&#xFF0C;&#x76EE;&#x524D;&#x8D8A;&#x6765;&#x8D8A;&#x591A;&#x7684;&#x4EBA;&#x5F00;&#x59CB;&#x7528;&#x5B83;&#xFF0C;&#x5B83;&#x5F88;&#x53EF;&#x80FD;&#x4F1A;&#x6210;&#x4E3A; CSS &#x9884;&#x5904;&#x7406;&#x5668;&#x7684;&#x6700;&#x7EC8;&#x8D62;&#x5BB6;&#x3002;</p>
<blockquote>
<p>PostCSS &#x548C; CSS &#x7684;&#x5173;&#x7CFB;&#x5C31;&#x50CF; Babel &#x548C; JavaScript &#x7684;&#x5173;&#x7CFB;&#xFF0C;&#x5B83;&#x4EEC;&#x89E3;&#x9664;&#x4E86;&#x8BED;&#x6CD5;&#x4E0A;&#x7684;&#x7981;&#x9522;&#xFF0C;&#x901A;&#x8FC7;&#x63D2;&#x4EF6;&#x673A;&#x5236;&#x6765;&#x6269;&#x5C55;&#x8BED;&#x8A00;&#x672C;&#x8EAB;&#xFF0C;&#x7528;&#x5DE5;&#x7A0B;&#x5316;&#x624B;&#x6BB5;&#x7ED9;&#x8BED;&#x8A00;&#x5E26;&#x6765;&#x4E86;&#x66F4;&#x591A;&#x7684;&#x53EF;&#x80FD;&#x6027;&#x3002;</p>
<p>PostCSS &#x548C; SCSS &#x7684;&#x5173;&#x7CFB;&#x5C31;&#x50CF; Babel &#x548C; TypeScript &#x7684;&#x5173;&#x7CFB;&#xFF0C;PostCSS &#x66F4;&#x52A0;&#x7075;&#x6D3B;&#x3001;&#x53EF;&#x6269;&#x5F20;&#x6027;&#x5F3A;&#xFF0C;&#x800C; SCSS &#x5185;&#x7F6E;&#x4E86;&#x5927;&#x91CF;&#x529F;&#x80FD;&#x800C;&#x4E0D;&#x80FD;&#x6269;&#x5C55;&#x3002;</p>
</blockquote>
<p></p><p>&#x60F3;&#x6DF1;&#x5165;&#x5B66;&#x4E60; &#x6DF1;&#x5165; PostCSS&#xFF0C;&#x63A8;&#x8350;&#x300A;&#x6DF1;&#x5165;PostCSS Web&#x8BBE;&#x8BA1;&#x300B;&#xFF1A;</p>
<a href="http://union-click.jd.com/jdc?d=hKtbgE" target="_blank">
<img src="http://img12.360buyimg.com/n1/jfs/t6037/101/5599226387/412098/e3f2d019/596cf567Ncc4bbbb4.jpg">
</a><p></p>
<p>&#x4E3A;&#x4E86;&#x66F4;&#x76F4;&#x89C2;&#x7684;&#x5C55;&#x793A; PostCSS&#xFF0C;&#x8BA9;&#x6211;&#x4EEC;&#x6765;&#x770B;&#x4E00;&#x4E9B;&#x4F8B;&#x5B50;&#x3002;</p>
<p>&#x7ED9; CSS &#x81EA;&#x52A8;&#x52A0;&#x524D;&#x7F00;&#xFF0C;&#x589E;&#x52A0;&#x5404;&#x6D4F;&#x89C8;&#x5668;&#x7684;&#x517C;&#x5BB9;&#x6027;&#xFF1A;</p>
<pre><code class="lang-css"><span class="hljs-comment">/*&#x8F93;&#x5165;*/</span>
<span class="hljs-selector-tag">h1</span> {
  <span class="hljs-attribute">display</span>: flex;
}

<span class="hljs-comment">/*&#x8F93;&#x51FA;*/</span>
<span class="hljs-selector-tag">h1</span> {
  <span class="hljs-attribute">display</span>: -webkit-box;
  <span class="hljs-attribute">display</span>: -webkit-flex;
  <span class="hljs-attribute">display</span>: -ms-flexbox;
  <span class="hljs-attribute">display</span>: flex;
}
</code></pre>
<p>&#x4F7F;&#x7528;&#x4E0B;&#x4E00;&#x4EE3; CSS &#x8BED;&#x6CD5;&#xFF1A;</p>
<pre><code class="lang-css"><span class="hljs-comment">/*&#x8F93;&#x5165;*/</span>
<span class="hljs-selector-pseudo">:root</span> {
  <span class="hljs-attribute">--red</span>: <span class="hljs-number">#d33</span>;
}

<span class="hljs-selector-tag">h1</span> {
  <span class="hljs-attribute">color</span>: <span class="hljs-built_in">var</span>(--red);
}


<span class="hljs-comment">/*&#x8F93;&#x51FA;*/</span>
<span class="hljs-selector-tag">h1</span> { 
  <span class="hljs-attribute">color</span>: <span class="hljs-number">#d33</span>;
}
</code></pre>
<p>PostCSS &#x5168;&#x90E8;&#x91C7;&#x7528; JavaScript &#x7F16;&#x5199;&#xFF0C;&#x8FD0;&#x884C;&#x5728; Node.js &#x4E4B;&#x4E0A;&#xFF0C;&#x5373;&#x63D0;&#x4F9B;&#x4E86;&#x7ED9; JavaScript &#x4EE3;&#x7801;&#x8C03;&#x7528;&#x7684;&#x6A21;&#x5757;&#xFF0C;&#x4E5F;&#x63D0;&#x4F9B;&#x4E86;&#x53EF;&#x6267;&#x884C;&#x7684;&#x6587;&#x4EF6;&#x3002;
&#x5728; PostCSS &#x542F;&#x52A8;&#x65F6;&#xFF0C;&#x4F1A;&#x4ECE;&#x76EE;&#x5F55;&#x4E0B;&#x7684; <code>postcss.config.js</code> &#x6587;&#x4EF6;&#x4E2D;&#x8BFB;&#x53D6;&#x6240;&#x9700;&#x914D;&#x7F6E;&#xFF0C;&#x6240;&#x4EE5;&#x9700;&#x8981;&#x65B0;&#x5EFA;&#x8BE5;&#x6587;&#x4EF6;&#xFF0C;&#x6587;&#x4EF6;&#x5185;&#x5BB9;&#x5927;&#x81F4;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = {
  plugins: [
    <span class="hljs-comment">// &#x9700;&#x8981;&#x4F7F;&#x7528;&#x7684;&#x63D2;&#x4EF6;&#x5217;&#x8868;</span>
    <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;postcss-cssnext&apos;</span>)
  ]
}
</code></pre>
<p>&#x5176;&#x4E2D;&#x7684; <a href="http://cssnext.io" target="_blank">postcss-cssnext</a> &#x63D2;&#x4EF6;&#x53EF;&#x4EE5;&#x8BA9;&#x4F60;&#x4F7F;&#x7528;&#x4E0B;&#x4E00;&#x4EE3; CSS &#x8BED;&#x6CD5;&#x7F16;&#x5199;&#x4EE3;&#x7801;&#xFF0C;&#x518D;&#x901A;&#x8FC7; PostCSS &#x8F6C;&#x6362;&#x6210;&#x76EE;&#x524D;&#x7684;&#x6D4F;&#x89C8;&#x5668;&#x53EF;&#x8BC6;&#x522B;&#x7684; CSS&#xFF0C;&#x5E76;&#x4E14;&#x8BE5;&#x63D2;&#x4EF6;&#x8FD8;&#x5305;&#x542B;&#x7ED9; CSS &#x81EA;&#x52A8;&#x52A0;&#x524D;&#x7F00;&#x7684;&#x529F;&#x80FD;&#x3002;</p>
<blockquote>
<p>&#x76EE;&#x524D; Chrome &#x7B49;&#x73B0;&#x4EE3;&#x6D4F;&#x89C8;&#x5668;&#x5DF2;&#x7ECF;&#x80FD;&#x5B8C;&#x5168;&#x652F;&#x6301; cssnext &#x4E2D;&#x7684;&#x6240;&#x6709;&#x8BED;&#x6CD5;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#x6309;&#x7167; cssnext &#x8BED;&#x6CD5;&#x5199;&#x7684; CSS &#x5728;&#x4E0D;&#x7ECF;&#x8FC7;&#x8F6C;&#x6362;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#x4E5F;&#x80FD;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x4E2D;&#x76F4;&#x63A5;&#x8FD0;&#x884C;&#x3002; </p>
</blockquote>
<h2 id="&#x63A5;&#x5165;-webpack">&#x63A5;&#x5165; Webpack</h2>
<p>&#x867D;&#x7136;&#x4F7F;&#x7528; PostCSS &#x540E;&#x6587;&#x4EF6;&#x540E;&#x7F00;&#x8FD8;&#x662F; <code>.css</code> &#x4F46;&#x8FD9;&#x4E9B;&#x6587;&#x4EF6;&#x5FC5;&#x987B;&#x5148;&#x4EA4;&#x7ED9; <a href="https://github.com/postcss/postcss-loader" target="_blank">postcss-loader</a> &#x5904;&#x7406;&#x4E00;&#x904D;&#x540E;&#x518D;&#x4EA4;&#x7ED9; css-loader&#x3002;</p>
<p>&#x63A5;&#x5165; PostCSS &#x76F8;&#x5173;&#x7684; Webpack &#x914D;&#x7F6E;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-js"><span class="hljs-built_in">module</span>.exports = {
  <span class="hljs-built_in">module</span>: {
    rules: [
      {
        <span class="hljs-comment">// &#x4F7F;&#x7528; PostCSS &#x5904;&#x7406; CSS &#x6587;&#x4EF6;</span>
        test: <span class="hljs-regexp">/\.css$/</span>,
        use: [<span class="hljs-string">&apos;style-loader&apos;</span>, <span class="hljs-string">&apos;css-loader&apos;</span>, <span class="hljs-string">&apos;postcss-loader&apos;</span>],
      },
    ]
  },
};
</code></pre>
<p>&#x63A5;&#x5165; PostCSS &#x7ED9;&#x9879;&#x76EE;&#x5E26;&#x6765;&#x4E86;&#x65B0;&#x7684;&#x4F9D;&#x8D56;&#x9700;&#x8981;&#x5B89;&#x88C5;&#xFF0C;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre><code class="lang-bash"><span class="hljs-comment"># &#x5B89;&#x88C5; Webpack Loader &#x4F9D;&#x8D56;</span>
npm i -D postcss-loader css-loader style-loader
<span class="hljs-comment"># &#x6839;&#x636E;&#x4F60;&#x4F7F;&#x7528;&#x7684;&#x7279;&#x6027;&#x5B89;&#x88C5;&#x5BF9;&#x5E94;&#x7684; PostCSS &#x63D2;&#x4EF6;&#x4F9D;&#x8D56;</span>
npm i -D postcss-cssnext
</code></pre>
<blockquote>
<p>&#x672C;&#x5B9E;&#x4F8B;<a href="http://webpack.wuhaolin.cn/3-5&#x4F7F;&#x7528;PostCSS.zip" target="_blank">&#x63D0;&#x4F9B;&#x9879;&#x76EE;&#x5B8C;&#x6574;&#x4EE3;&#x7801;</a></p>
</blockquote>

                                
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