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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Getting Started · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;p&gt;Create React App is an officially supported way to create single-page React&lt;/p&gt;
"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Getting Started · Create React App"/><meta property="og:type" content="website"/><meta property="og:url" content="https://facebook.github.io/create-react-app/index.html"/><meta property="og:description" content="&lt;p&gt;Create React App is an officially supported way to create single-page React&lt;/p&gt;
"/><meta property="og:image" content="https://facebook.github.io/create-react-app/img/logo-og.png"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://facebook.github.io/create-react-app/img/logo-og.png"/><link rel="shortcut icon" href="/create-react-app/img/favicon/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script src="https://unpkg.com/vanilla-back-to-top@7.1.14/dist/vanilla-back-to-top.min.js"></script><script>
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</script><link rel="stylesheet" href="/create-react-app/css/main.css"/><script src="/create-react-app/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/create-react-app/"><img class="logo" src="/create-react-app/img/logo.svg" alt="Create React App"/><h2 class="headerTitleWithLogo">Create React App</h2></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive siteNavItemActive"><a href="/create-react-app/docs/getting-started" target="_self">Docs</a></li><li class=""><a href="https://reactjs.org/community/support.html" target="_self">Help</a></li><li class=""><a href="https://www.github.com/facebook/create-react-app" target="_self">GitHub</a></li><li class="navSearchWrapper reactNavSearchWrapper"><input type="text" id="search_input_react" placeholder="Search" title="Search"/></li></ul></nav></div></header></div></div><div class="navPusher"><div class="docMainWrapper wrapper"><div class="container docsNavContainer" id="docsNav"><nav class="toc"><div class="toggleNav"><section class="navWrapper wrapper"><div class="navBreadcrumb wrapper"><div class="navToggle" id="navToggler"><i></i></div><h2><i>›</i><span>Getting Started</span></h2><div class="tocToggler" id="tocToggler"><i class="icon-toc"></i></div></div><div class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Welcome<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/documentation-intro">About Docs</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Getting Started<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem navListItemActive"><a class="navItem" href="/create-react-app/docs/getting-started">Getting Started</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/folder-structure">Folder Structure</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/available-scripts">Available Scripts</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/supported-browsers-features">Supported Browsers and Features</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/updating-to-new-releases">Updating to New Releases</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Development<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/setting-up-your-editor">Editor Setup</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/developing-components-in-isolation">Developing Components in Isolation</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/analyzing-the-bundle-size">Analyzing Bundle Size</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/using-https-in-development">HTTPS in Development</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Styles and Assets<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-a-stylesheet">Adding Stylesheets</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-a-css-modules-stylesheet">Adding CSS Modules</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-a-sass-stylesheet">Adding Sass Stylesheets</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/post-processing-css">Post-Processing CSS</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-images-fonts-and-files">Adding Images, Fonts, and Files</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/using-the-public-folder">Using the Public Folder</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/code-splitting">Code Splitting</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Building your App<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/installing-a-dependency">Installing a Dependency</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/importing-a-component">Importing a Component</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/using-global-variables">Using Global Variables</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-bootstrap">Adding Bootstrap</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-flow">Adding Flow</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-typescript">Adding TypeScript</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-relay">Adding Relay</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-a-router">Adding a Router</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/adding-custom-environment-variables">Environment Variables</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/making-a-progressive-web-app">Making a Progressive Web App</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/production-build">Creating a Production Build</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Testing<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/running-tests">Running Tests</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/debugging-tests">Debugging Tests</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Back-End Integration<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/proxying-api-requests-in-development">Proxying in Development</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/fetching-data-with-ajax-requests">Fetching Data</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/integrating-with-an-api-backend">Integrating with an API</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/title-and-meta-tags">Title &amp; Meta Tags</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Deployment<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/deployment">Deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Advanced Usage<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/can-i-use-decorators">Can I Use Decorators?</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/pre-rendering-into-static-html-files">Pre-Rendering Static HTML</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/advanced-configuration">Advanced Configuration</a></li><li class="navListItem"><a class="navItem" href="/create-react-app/docs/alternatives-to-ejecting">Alternatives to Ejecting</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Support<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/create-react-app/docs/troubleshooting">Troubleshooting</a></li></ul></div></div></section></div><script>
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</script></nav></div><div class="container mainContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/facebook/create-react-app/edit/master/docusaurus/docs/getting-started.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Getting Started</h1></header><article><div><span><p>Create React App is an officially supported way to create single-page React
applications. It offers a modern build setup with no configuration.</p>
<h2><a class="anchor" aria-hidden="true" id="quick-start"></a><a href="#quick-start" 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>Quick Start</h2>
<pre><code class="hljs css language-sh">npx create-react-app my-app
<span class="hljs-built_in">cd</span> my-app
npm start
</code></pre>
<blockquote>
<p>If you've previously installed <code>create-react-app</code> globally via <code>npm install -g create-react-app</code>, we recommend you uninstall the package using <code>npm uninstall -g create-react-app</code> to ensure that <code>npx</code> always uses the latest version.</p>
</blockquote>
<p><em>(<a href="https://medium.com/@maybekatz/introducing-npx-an-npm-package-runner-55f7d4bd282b">npx</a> comes with npm 5.2+ and higher, see <a href="https://gist.github.com/gaearon/4064d3c23a77c74a3614c498a8bb1c5f">instructions for older npm versions</a>)</em></p>
<p>Then open <a href="http://localhost:3000/">http://localhost:3000/</a> to see your app.</p>
<p>When you’re ready to deploy to production, create a minified bundle with <code>npm run build</code>.</p>
<p align='center'>
<img src='https://cdn.rawgit.com/facebook/create-react-app/27b42ac/screencast.svg' width='600' alt='npm start'>
</p>
<h3><a class="anchor" aria-hidden="true" id="get-started-immediately"></a><a href="#get-started-immediately" 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>Get Started Immediately</h3>
<p>You <strong>don’t</strong> need to install or configure tools like Webpack or Babel. They are preconfigured and hidden so that you can focus on the code.</p>
<p>Just create a project, and you’re good to go.</p>
<h2><a class="anchor" aria-hidden="true" id="creating-an-app"></a><a href="#creating-an-app" 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>Creating an App</h2>
<p><strong>You’ll need to have Node &gt;= 6 on your local development machine</strong> (but it’s not required on the server). You can use <a href="https://github.com/creationix/nvm#installation">nvm</a> (macOS/Linux) or <a href="https://github.com/coreybutler/nvm-windows#node-version-manager-nvm-for-windows">nvm-windows</a> to easily switch Node versions between different projects.</p>
<p>To create a new app, you may choose one of the following methods:</p>
<h3><a class="anchor" aria-hidden="true" id="npx"></a><a href="#npx" 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>npx</h3>
<pre><code class="hljs css language-sh">npx create-react-app my-app
</code></pre>
<p><em>(<a href="https://medium.com/@maybekatz/introducing-npx-an-npm-package-runner-55f7d4bd282b">npx</a> comes with npm 5.2+ and higher, see <a href="https://gist.github.com/gaearon/4064d3c23a77c74a3614c498a8bb1c5f">instructions for older npm versions</a>)</em></p>
<h3><a class="anchor" aria-hidden="true" id="npm"></a><a href="#npm" 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>npm</h3>
<pre><code class="hljs css language-sh">npm init react-app my-app
</code></pre>
<p><em><code>npm init &lt;initializer&gt;</code> is available in npm 6+</em></p>
<h3><a class="anchor" aria-hidden="true" id="yarn"></a><a href="#yarn" 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>Yarn</h3>
<pre><code class="hljs css language-sh">yarn create react-app my-app
</code></pre>
<p><em><code>yarn create</code> is available in Yarn 0.25+</em></p>
<h2><a class="anchor" aria-hidden="true" id="output"></a><a href="#output" 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>Output</h2>
<p>Running any of these commands will create a directory called <code>my-app</code> inside the current folder. Inside that directory, it will generate the initial project structure and install the transitive dependencies:</p>
<pre><code class="hljs">my-app
├── README<span class="hljs-selector-class">.md</span>
├── node_modules
├── package<span class="hljs-selector-class">.json</span>
├── <span class="hljs-selector-class">.gitignore</span>
├── public
│ ├── favicon<span class="hljs-selector-class">.ico</span>
│ ├── index<span class="hljs-selector-class">.html</span>
│ └── manifest<span class="hljs-selector-class">.json</span>
└── src
├── App<span class="hljs-selector-class">.css</span>
├── App<span class="hljs-selector-class">.js</span>
├── App<span class="hljs-selector-class">.test</span><span class="hljs-selector-class">.js</span>
├── index<span class="hljs-selector-class">.css</span>
├── index<span class="hljs-selector-class">.js</span>
├── logo<span class="hljs-selector-class">.svg</span>
└── serviceWorker<span class="hljs-selector-class">.js</span>
</code></pre>
<p>No configuration or complicated folder structures, just the files you need to build your app. Once the installation is done, you can open your project folder:</p>
<pre><code class="hljs css language-sh"><span class="hljs-built_in">cd</span> my-app
</code></pre>
<h2><a class="anchor" aria-hidden="true" id="scripts"></a><a href="#scripts" 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>Scripts</h2>
<p>Inside the newly created project, you can run some built-in commands:</p>
<h3><a class="anchor" aria-hidden="true" id="npm-start-or-yarn-start"></a><a href="#npm-start-or-yarn-start" 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>npm start</code> or <code>yarn start</code></h3>
<p>Runs the app in development mode. Open <a href="http://localhost:3000">http://localhost:3000</a> to view it in the browser.</p>
<p>The page will automatically reload if you make changes to the code. You will see the build errors and lint warnings in the console.</p>
<p align='center'>
<img src='https://cdn.rawgit.com/marionebl/create-react-app/9f62826/screencast-error.svg' width='600' alt='Build errors'>
</p>
<h3><a class="anchor" aria-hidden="true" id="npm-test-or-yarn-test"></a><a href="#npm-test-or-yarn-test" 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>npm test</code> or <code>yarn test</code></h3>
<p>Runs the test watcher in an interactive mode. By default, runs tests related to files changed since the last commit.</p>
<p><a href="https://facebook.github.io/create-react-app/docs/running-tests">Read more about testing</a>.</p>
<h3><a class="anchor" aria-hidden="true" id="npm-run-build-or-yarn-build"></a><a href="#npm-run-build-or-yarn-build" 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>npm run build</code> or <code>yarn build</code></h3>
<p>Builds the app for production to the <code>build</code> folder. It correctly bundles React in production mode and optimizes the build for the best performance.</p>
<p>The build is minified and the filenames include the hashes.</p>
<p>Your app is ready to be deployed.</p>
</span></div></article></div><div class="docLastUpdate"><em>Last updated on 2/4/2019 by Rico Kahler</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/create-react-app/docs/documentation-intro"><span class="arrow-prev">← </span><span>About Docs</span></a><a class="docs-next button" href="/create-react-app/docs/folder-structure"><span>Folder Structure</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#quick-start">Quick Start</a><ul class="toc-headings"><li><a href="#get-started-immediately">Get Started Immediately</a></li></ul></li><li><a href="#creating-an-app">Creating an App</a><ul class="toc-headings"><li><a href="#npx">npx</a></li><li><a href="#npm">npm</a></li><li><a href="#yarn">Yarn</a></li></ul></li><li><a href="#output">Output</a></li><li><a href="#scripts">Scripts</a><ul class="toc-headings"><li><a href="#npm-start-or-yarn-start"><code>npm start</code> or <code>yarn start</code></a></li><li><a href="#npm-test-or-yarn-test"><code>npm test</code> or <code>yarn test</code></a></li><li><a href="#npm-run-build-or-yarn-build"><code>npm run build</code> or <code>yarn build</code></a></li></ul></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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