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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 TypeScript · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="> Note: this feature is available with `react-scripts@2.1.0` and higher."/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Adding TypeScript · 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="> Note: this feature is available with `react-scripts@2.1.0` and higher."/><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 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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></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Testing</h3><ul><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">Back-End Integration</h3><ul><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 & Meta Tags</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Deployment</h3><ul><li class="navListItem"><a class="navItem" href="/create-react-app/docs/deployment">Deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Advanced Usage</h3><ul><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">Support</h3><ul><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 docMainContainer"><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/adding-typescript.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Adding TypeScript</h1></header><article><div><span><blockquote>
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<p>Note: this feature is available with <code>react-scripts@2.1.0</code> and higher.</p>
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</blockquote>
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<p><a href="https://www.typescriptlang.org/">TypeScript</a> is a typed superset of JavaScript that compiles to plain JavaScript.</p>
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<p>To add <a href="https://www.typescriptlang.org/">TypeScript</a> to a Create React App project, first install it:</p>
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<pre><code class="hljs css language-bash">$ npm install --save typescript @types/node @types/react @types/react-dom @types/jest
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$ <span class="hljs-comment"># or</span>
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$ yarn add typescript @types/node @types/react @types/react-dom @types/jest
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</code></pre>
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<p>Next, rename any file to be a TypeScript file (e.g. <code>src/index.js</code> to <code>src/index.tsx</code>) and <strong>restart your development server</strong>!</p>
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<p>Type errors will show up in the same console as the build one.</p>
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<p>To learn more about TypeScript, check out <a href="https://www.typescriptlang.org/">its documentation</a>.</p>
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<blockquote>
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<p><strong>Note:</strong> You are not required to make a <a href="https://www.typescriptlang.org/docs/handbook/tsconfig-json.html"><code>tsconfig.json</code> file</a>, one will be made for you.
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You are allowed to edit the generated TypeScript configuration.</p>
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</blockquote>
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<blockquote>
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<p><strong>Note:</strong> If you are currently using <a href="https://github.com/wmonk/create-react-app-typescript/">create-react-app-typescript</a>, see <a href="https://vincenttunru.com/migrate-create-react-app-typescript-to-create-react-app/">this blog post</a> for instructions on how to migrate to Create React App.</p>
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</blockquote>
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<p><strong>Note:</strong> We recommend using <a href="https://code.visualstudio.com/">VSCode</a> for a better integrated experience.</p>
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<blockquote>
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<p><strong>Note:</strong> Constant enums and namespaces are not supported.</p>
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