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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Adding a CSS Modules Stylesheet · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;blockquote&gt;
&lt;p&gt;Note: this feature is available with &lt;code&gt;react-scripts@2.0.0&lt;/code&gt; and higher.&lt;/p&gt;
&lt;/blockquote&gt;
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&lt;p&gt;Note: this feature is available with &lt;code&gt;react-scripts@2.0.0&lt;/code&gt; and higher.&lt;/p&gt;
&lt;/blockquote&gt;
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<p>Note: this feature is available with <code>react-scripts@2.0.0</code> and higher.</p>
</blockquote>
<p>This project supports <a href="https://github.com/css-modules/css-modules">CSS Modules</a> alongside regular stylesheets using the <code>[name].module.css</code> file naming convention. CSS Modules allows the scoping of CSS by automatically creating a unique classname of the format <code>[filename]\_[classname]\_\_[hash]</code>.</p>
<blockquote>
<p><strong>Tip:</strong> Should you want to preprocess a stylesheet with Sass then make sure to <a href="/create-react-app/docs/adding-a-sass-stylesheet">follow the installation instructions</a> and then change the stylesheet file extension as follows: <code>[name].module.scss</code> or <code>[name].module.sass</code>.</p>
</blockquote>
<p>CSS Modules let you use the same CSS class name in different files without worrying about naming clashes. Learn more about CSS Modules <a href="https://css-tricks.com/css-modules-part-1-need/">here</a>.</p>
<h2><a class="anchor" aria-hidden="true" id="buttonmodulecss"></a><a href="#buttonmodulecss" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>Button.module.css</code></h2>
<pre><code class="hljs css language-css"><span class="hljs-selector-class">.error</span> {
<span class="hljs-attribute">background-color</span>: red;
}
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="another-stylesheetcss"></a><a href="#another-stylesheetcss" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>another-stylesheet.css</code></h2>
<pre><code class="hljs css language-css"><span class="hljs-selector-class">.error</span> {
<span class="hljs-attribute">color</span>: red;
}
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="buttonjs"></a><a href="#buttonjs" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>Button.js</code></h2>
<pre><code class="hljs css language-js"><span class="hljs-keyword">import</span> React, { Component } <span class="hljs-keyword">from</span> <span class="hljs-string">'react'</span>;
<span class="hljs-keyword">import</span> styles <span class="hljs-keyword">from</span> <span class="hljs-string">'./Button.module.css'</span>; <span class="hljs-comment">// Import css modules stylesheet as styles</span>
<span class="hljs-keyword">import</span> <span class="hljs-string">'./another-stylesheet.css'</span>; <span class="hljs-comment">// Import regular stylesheet</span>
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">Button</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Component</span> </span>{
render() {
<span class="hljs-comment">// reference as a js object</span>
<span class="hljs-keyword">return</span> <span class="xml"><span class="hljs-tag">&lt;<span class="hljs-name">button</span> <span class="hljs-attr">className</span>=<span class="hljs-string">{styles.error}</span>&gt;</span>Error Button<span class="hljs-tag">&lt;/<span class="hljs-name">button</span>&gt;</span></span>;
}
}
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="result"></a><a href="#result" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Result</h2>
<p>No clashes from other <code>.error</code> class names</p>
<pre><code class="hljs css language-html"><span class="hljs-comment">&lt;!-- This button has red background but not red text --&gt;</span>
<span class="hljs-tag">&lt;<span class="hljs-name">button</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"Button_error_ax7yz"</span>&gt;</span>Error Button<span class="hljs-tag">&lt;/<span class="hljs-name">button</span>&gt;</span>
</code></pre>
<p><strong>This is an optional feature.</strong> Regular <code>&lt;link&gt;</code> stylesheets and CSS files are fully supported. CSS Modules are turned on for files ending with the <code>.module.css</code> extension.</p>
</span></div></article></div><div class="docLastUpdate"><em>Last updated on 1/4/2019 by Hardo</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/create-react-app/docs/adding-a-stylesheet"><span class="arrow-prev">← </span><span>Adding Stylesheets</span></a><a class="docs-next button" href="/create-react-app/docs/adding-a-sass-stylesheet"><span>Adding Sass Stylesheets</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#buttonmodulecss"><code>Button.module.css</code></a></li><li><a href="#another-stylesheetcss"><code>another-stylesheet.css</code></a></li><li><a href="#buttonjs"><code>Button.js</code></a></li><li><a href="#result">Result</a></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/create-react-app/" class="nav-home"><img src="/create-react-app/img/logo.svg" alt="Create React App" width="66" height="58"/></a><div><h5>Docs</h5><a href="/create-react-app/docs/getting-started">Get Started</a><a href="https://reactjs.org/" target="_blank" rel="noreferrer noopener">Learn React</a></div><div><h5>Community</h5><a href="https://stackoverflow.com/questions/tagged/create-react-app" target="_blank" rel="noreferrer noopener">Stack Overflow</a><a href="https://spectrum.chat/react" target="_blank" rel="noreferrer noopener">Spectrum</a><a href="https://twitter.com/reactjs" target="_blank" rel="noreferrer noopener">Twitter</a></div><div><h5>More</h5><a href="https://www.github.com/facebook/create-react-app">GitHub</a><a class="github-button" href="https://github.com/facebook/create-react-app" data-icon="octicon-star" data-count-href="/facebook/create-react-app/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><a href="https://code.facebook.com/projects/" target="_blank" rel="noreferrer noopener" class="fbOpenSource"><img src="/create-react-app/img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"/></a><section class="copyright">Copyright © 2019 Facebook Inc.</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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