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<link rel="manifest" href="/manifest.webmanifest"><link rel="icon" href="/logo.png"><title>环境变量 | Fes.js</title><meta name="description" content="一个好用的前端应用解决方案">
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sidebar-item">介绍</p><ul class=""><li><!--[--><a href="/fes.js/guide/" class="nav-link router-link-active sidebar-item" aria-label="介绍"><!--[--><!--]--> 介绍 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/getting-started.html" class="nav-link sidebar-item" aria-label="快速上手"><!--[--><!--]--> 快速上手 <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--><!--[--><p class="sidebar-heading sidebar-item active">基础</p><ul class=""><li><!--[--><a href="/fes.js/guide/directory-structure.html" class="nav-link sidebar-item" aria-label="目录结构"><!--[--><!--]--> 目录结构 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/config.html" class="nav-link sidebar-item" aria-label="配置"><!--[--><!--]--> 配置 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/runtime-config.html" class="nav-link sidebar-item" aria-label="运行时配置"><!--[--><!--]--> 运行时配置 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html" class="router-link-active router-link-exact-active nav-link router-link-active sidebar-item active" aria-label="环境变量"><!--[--><!--]--> 环境变量 <!--[--><!--]--></a><ul class="sidebar-sub-items"><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#配置环境变量" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="配置环境变量"><!--[--><!--]--> 配置环境变量 <!--[--><!--]--></a><ul class="sidebar-sub-items"><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#命令行添加" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="命令行添加"><!--[--><!--]--> 命令行添加 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#env-文件配置" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label=".env 文件配置"><!--[--><!--]--> .env 文件配置 <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#编译时配置列表" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="编译时配置列表"><!--[--><!--]--> 编译时配置列表 <!--[--><!--]--></a><ul class="sidebar-sub-items"><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#fes-env" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="FES_ENV"><!--[--><!--]--> FES_ENV <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#fes-presets" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="FES_PRESETS"><!--[--><!--]--> FES_PRESETS <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#fes-plugins" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="FES_PLUGINS"><!--[--><!--]--> FES_PLUGINS <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#port" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="PORT"><!--[--><!--]--> PORT <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#host" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="HOST"><!--[--><!--]--> HOST <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#https" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="HTTPS"><!--[--><!--]--> HTTPS <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#watch" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="WATCH"><!--[--><!--]--> WATCH <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#babel-cache" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="BABEL_CACHE"><!--[--><!--]--> BABEL_CACHE <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#analyze" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="ANALYZE"><!--[--><!--]--> ANALYZE <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#analyze-mode" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="ANALYZE_MODE"><!--[--><!--]--> ANALYZE_MODE <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#analyze-port" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="ANALYZE_PORT"><!--[--><!--]--> ANALYZE_PORT <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#clear-output" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="CLEAR_OUTPUT"><!--[--><!--]--> CLEAR_OUTPUT <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#rm-tmpdir" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="RM_TMPDIR"><!--[--><!--]--> RM_TMPDIR <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--></li><li><!--[--><a aria-current="page" href="/fes.js/guide/env.html#process-env" class="router-link-active router-link-exact-active nav-link sidebar-item" aria-label="process.env"><!--[--><!--]--> process.env <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--></li><li><!--[--><a href="/fes.js/guide/route.html" class="nav-link sidebar-item" aria-label="路由"><!--[--><!--]--> 路由 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/plugin.html" class="nav-link sidebar-item" aria-label="插件"><!--[--><!--]--> 插件 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/template.html" class="nav-link sidebar-item" aria-label="HTML 模板"><!--[--><!--]--> HTML 模板 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/mock.html" class="nav-link sidebar-item" aria-label="Mock 数据"><!--[--><!--]--> Mock 数据 <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--><!--[--><p class="sidebar-heading sidebar-item">样式和资源文件</p><ul class=""><li><!--[--><a href="/fes.js/guide/image.html" class="nav-link sidebar-item" aria-label="使用图片"><!--[--><!--]--> 使用图片 <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/css.html" class="nav-link sidebar-item" aria-label="使用 css"><!--[--><!--]--> 使用 css <!--[--><!--]--></a><!----><!--]--></li><li><!--[--><a href="/fes.js/guide/public.html" class="nav-link sidebar-item" aria-label="静态资源"><!--[--><!--]--> 静态资源 <!--[--><!--]--></a><!----><!--]--></li></ul><!--]--><!--[--><a href="/fes.js/guide/contributing.html" class="nav-link sidebar-heading sidebar-item" aria-label="贡献指南"><!--[--><!--]--> 贡献指南 <!--[--><!--]--></a><!----><!--]--><!--[--><a href="/fes.js/guide/faq.html" class="nav-link sidebar-heading sidebar-item" aria-label="常见问题"><!--[--><!--]--> 常见问题 <!--[--><!--]--></a><!----><!--]--><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page"><!--[--><!--]--><div class="theme-default-content"><!--[--><h1 id="环境变量" tabindex="-1"><a class="header-anchor" href="#环境变量" aria-hidden="true">#</a> 环境变量</h1><p>在构建或者代码在端上运行中需要一些跟区分于环境的变量，用于配置构建流程或者运行时过程，这时候我们可以配置环境变量。</p><h2 id="配置环境变量" tabindex="-1"><a class="header-anchor" href="#配置环境变量" aria-hidden="true">#</a> 配置环境变量</h2><h3 id="命令行添加" tabindex="-1"><a class="header-anchor" href="#命令行添加" aria-hidden="true">#</a> 命令行添加</h3><p>比如：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token comment"># OS X, Linux</span>
<span class="token assign-left variable">PORT</span><span class="token operator">=</span><span class="token number">3000</span> fes dev
<span class="token comment"># Windows (cmd.exe)</span>
<span class="token builtin class-name">set</span> <span class="token assign-left variable">PORT</span><span class="token operator">=</span><span class="token number">3000</span> <span class="token operator">&amp;&amp;</span> fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><p>如果要同时考虑 OS X 和 Windows，可借助三方工具 <a href="https://github.com/kentcdodds/cross-env" target="_blank" rel="noopener noreferrer">cross-env<span><svg class="icon outbound" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><!--[--><span class="sr-only">在新窗口打开</span><!--]--></span></a></p><div class="code-group"><div class="code-group__nav"><ul class="code-group__ul"><li class="code-group__li"><button class="code-group__nav-tab code-group__nav-tab-active" ariapressed="true" ariaexpanded="true">YARN</button></li><li class="code-group__li"><button class="code-group__nav-tab" ariapressed="false" ariaexpanded="false">NPM</button></li></ul></div><!--[--><div class="code-group-item code-group-item__active" aria-selected="true"><!--[--><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">yarn</span> <span class="token function">add</span> cross-env --dev
cross-env <span class="token assign-left variable">PORT</span><span class="token operator">=</span><span class="token number">3000</span> fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><!--]--></div><div class="code-group-item" aria-selected="false"><!--[--><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">npm</span> i cross-env --save-dev
cross-env <span class="token assign-left variable">PORT</span><span class="token operator">=</span><span class="token number">3000</span> fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><!--]--></div><!--]--></div><h3 id="env-文件配置" tabindex="-1"><a class="header-anchor" href="#env-文件配置" aria-hidden="true">#</a> <code>.env</code> 文件配置</h3><p>Fes.js 中约定根目录下以 <code>.env</code> 开头的文件为环境变量配置文件。</p><p>比如：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token assign-left variable">PORT</span><span class="token operator">=</span><span class="token number">3000</span>
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><p>然后执行</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><p>会以 3000 端口启动 dev server。</p><h4 id="本地临时配置" tabindex="-1"><a class="header-anchor" href="#本地临时配置" aria-hidden="true">#</a> 本地临时配置</h4><p>可以新建 <code>.env.local</code>，这份配置会和 <code>.env</code> 做合并后形成最终配置。</p><h4 id="环境配置" tabindex="-1"><a class="header-anchor" href="#环境配置" aria-hidden="true">#</a> 环境配置</h4><p>可以通过环境变量 <code>FES_ENV</code> 区分不同环境来指定配置，这时候必须在执行命令前添加 <code>FES_ENV</code> 保证执行加载环境变量配置文件逻辑前 <code>FES_ENV</code> 已设置。</p><p>举个 🌰 ：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token assign-left variable">FES_ENV</span><span class="token operator">=</span>sit fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><p>如果存在 <code>.env.sit</code> 文件，则会将 <code>.env.sit</code> 的配置和 <code>.env</code> 做合并后形成最终配置。</p><h4 id="配置优先级" tabindex="-1"><a class="header-anchor" href="#配置优先级" aria-hidden="true">#</a> 配置优先级</h4><p>本地临时配置 &gt; 环境配置 &gt; 基础配置</p><div class="custom-container tip"><p class="custom-container-title">提示</p><p>如果多份配置中存在相同的配置项，<strong>则优先级高的会覆盖优先级低的</strong>。</p></div><h2 id="编译时配置列表" tabindex="-1"><a class="header-anchor" href="#编译时配置列表" aria-hidden="true">#</a> 编译时配置列表</h2><p>编译时配置是在构建过程需要的变量，开放给用户配置。</p><h3 id="fes-env" tabindex="-1"><a class="header-anchor" href="#fes-env" aria-hidden="true">#</a> FES_ENV</h3><p>指定当前的环境，不同环境各自的配置文件。</p><div class="custom-container tip"><p class="custom-container-title">提示</p><p><code>FES_ENV</code> 在会在加载<code>.env</code>前使用，所以只能用命令行方式配置。</p></div><h3 id="fes-presets" tabindex="-1"><a class="header-anchor" href="#fes-presets" aria-hidden="true">#</a> FES_PRESETS</h3><p>添加额外的插件集入口</p><h3 id="fes-plugins" tabindex="-1"><a class="header-anchor" href="#fes-plugins" aria-hidden="true">#</a> FES_PLUGINS</h3><p>添加额外的插件入口</p><h3 id="port" tabindex="-1"><a class="header-anchor" href="#port" aria-hidden="true">#</a> PORT</h3><p><code>fes dev</code> 时服务指定的端口号，默认是 <code>8080</code></p><h3 id="host" tabindex="-1"><a class="header-anchor" href="#host" aria-hidden="true">#</a> HOST</h3><p>默认是 <code>localhost</code>。</p><h3 id="https" tabindex="-1"><a class="header-anchor" href="#https" aria-hidden="true">#</a> HTTPS</h3><p>默认是 <code>false</code>。</p><h3 id="watch" tabindex="-1"><a class="header-anchor" href="#watch" aria-hidden="true">#</a> WATCH</h3><p>设为 none 时不监听文件变更。比如：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>WATCH=none fes dev
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><h3 id="babel-cache" tabindex="-1"><a class="header-anchor" href="#babel-cache" aria-hidden="true">#</a> BABEL_CACHE</h3><p>默认开启 Babel 编译缓存，值为 none 时禁用缓存。</p><h3 id="analyze" tabindex="-1"><a class="header-anchor" href="#analyze" aria-hidden="true">#</a> ANALYZE</h3><p>用于分析 bundle 构成，默认关闭。</p><p>比如：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>ANALYZE=1 fes build
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><h3 id="analyze-mode" tabindex="-1"><a class="header-anchor" href="#analyze-mode" aria-hidden="true">#</a> ANALYZE_MODE</h3><p>默认是<code>server</code></p><h3 id="analyze-port" tabindex="-1"><a class="header-anchor" href="#analyze-port" aria-hidden="true">#</a> ANALYZE_PORT</h3><p>默认是<code>8888</code></p><h3 id="clear-output" tabindex="-1"><a class="header-anchor" href="#clear-output" aria-hidden="true">#</a> CLEAR_OUTPUT</h3><p>仅仅在 <code>build</code> 时生效。如果设置为 <code>none</code>，就不会在构建前清除 <code>Output</code> 文件内容。</p><h3 id="rm-tmpdir" tabindex="-1"><a class="header-anchor" href="#rm-tmpdir" aria-hidden="true">#</a> RM_TMPDIR</h3><p>仅仅在 <code>build</code> 时生效。如果设置为 <code>none</code>，就不会在构建后清除 <code>.fes</code> 临时文件内容。</p><h2 id="process-env" tabindex="-1"><a class="header-anchor" href="#process-env" aria-hidden="true">#</a> process.env</h2><p>运行时配置需要以 <code>FES_APP_</code> 开头，比如在 <code>.env</code> 中配置：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>FES_APP_KEY=123456789
</code></pre><div class="line-numbers"><span class="line-number">1</span><br></div></div><p>在代码中使用：</p><div class="language-javascript ext-js line-numbers-mode"><pre class="language-javascript"><code>console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">FES_APP_KEY</span><span class="token punctuation">)</span>
<span class="token comment">// 输出 123456789</span>
</code></pre><div class="line-numbers"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>除了用户自定义的以<code>FES_APP_</code>开头的变量，还提供如下配置：</p><ul><li><p><strong>NODE_ENV</strong>：Node 环境变量</p></li><li><p><strong>FES_ENV</strong>：Fes.js 环境变量</p></li><li><p><strong>BASE_URL</strong>：等同于 publicPath</p></li></ul><!--]--></div><footer class="page-meta"><div class="meta-item edit-link"><a class="nav-link external meta-item-label" href="https://github.com/WeBankFinTech/fes.js/edit/vue3/docs/guide/env.md" rel="noopener noreferrer" target="_blank" aria-label="在 GitHub 上编辑此页"><!--[--><!--]--> 在 GitHub 上编辑此页 <span><svg class="icon outbound" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><!--[--><span class="sr-only">在新窗口打开</span><!--]--></span><!--[--><!--]--></a></div><div class="meta-item last-updated"><span class="meta-item-label">上次更新: </span><!----></div><div class="meta-item contributors"><span class="meta-item-label">贡献者: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: 445436867@qq.com">wanchun</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav"><p class="inner"><span class="prev"><a href="/fes.js/guide/runtime-config.html" class="nav-link" aria-label="运行时配置"><!--[--><!--]--> 运行时配置 <!--[--><!--]--></a></span><span class="next"><a href="/fes.js/guide/route.html" class="nav-link" aria-label="路由"><!--[--><!--]--> 路由 <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!----><!--]--></div>
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