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<script src="https://snack.expo.io/embed.js" defer="defer"></script><title data-react-helmet="true">Introduction · React Native</title><meta data-react-helmet="true" property="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:image:alt" content="Image for React Native"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="0.63"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-0.63"><meta data-react-helmet="true" property="og:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:card" content="summary"><meta data-react-helmet="true" name="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" property="og:title" content="Introduction · React Native"><meta data-react-helmet="true" name="description" content="This helpful guide lays out the prerequisites for learning React Native, using these docs, and setting up your environment."><meta data-react-helmet="true" property="og:description" content="This helpful guide lays out the prerequisites for learning React Native, using these docs, and setting up your environment."><meta data-react-helmet="true" property="og:url" content="https://reactnative.dev/docs/getting-started"><link data-react-helmet="true" rel="shortcut icon" href="/img/favicon.ico"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://reactnative.dev/docs/getting-started"><link rel="stylesheet" href="/styles.fccefeba.css">
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class="menu__link menu__link--sublist" href="#!">Guides (Android)</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/headless-js-android">Headless JS</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/signed-apk-android">Publishing to Google Play Store</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/removing-default-permissions">Removing Default Permissions</a></li></ul></li><li class="menu__list-item menu__list-item--collapsed"><a class="menu__link menu__link--sublist" href="#!">Guides (iOS)</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/linking-libraries-ios">Linking Libraries</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/running-on-simulator-ios">Running On Simulator</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/communication-ios">Communication between native and React Native</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/app-extensions">App Extensions</a></li></ul></li></ul></div></div></div><main class="docMainContainer_1rYT"><div class="container padding-vert--lg docItemWrapper_1Hme"><div class="row"><div class="col docItemCol_2AGf"><div class="docItemContainer_1tAC"><article><header><h1 class="docTitle_cWlf">Introduction</h1></header><div class="markdown"><div class="content-banner"><p>Welcome to the very start of your React Native journey! If you're looking for environment setup instructions, they've moved to <a href="/docs/environment-setup">their own section</a>. Continue reading for an introduction to the documentation, Native Components, React, and more!</p><img class="content-banner-img" src="/docs/assets/p_android-ios-devices.svg" alt=" "></div><p>Many different kinds of people use React Native: from advanced iOS developers to React beginners, to people getting started programming for the first time in their career. These docs were written for all learners, no matter their experience level or background.</p><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="how-to-use-these-docs"></a>How to use these docs<a aria-hidden="true" tabindex="-1" class="hash-link" href="#how-to-use-these-docs" title="Direct link to heading">#</a></h2><p>You can start here and read through these docs linearly like a book; or you can read the specific sections you need. Already familiar with React? You can skip <a href="/docs/intro-react">that section</a>—or read it for a light refresher.</p><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="prerequisites"></a>Prerequisites<a aria-hidden="true" tabindex="-1" class="hash-link" href="#prerequisites" title="Direct link to heading">#</a></h2><p>To work with React Native, you will need to have an understanding of JavaScript fundamentals. If you’re new to JavaScript or need a refresher, you can <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript" target="_blank" rel="noopener noreferrer">dive in</a> or <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript" target="_blank" rel="noopener noreferrer">brush up</a> at Mozilla Developer Network.</p><blockquote><p>While we do our best to assume no prior knowledge of React, Android, or iOS development, these are valuable topics of study for the aspiring React Native developer. Where sensible, we have linked to resources and articles that go more in depth.</p></blockquote><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="interactive-examples"></a>Interactive examples<a aria-hidden="true" tabindex="-1" class="hash-link" href="#interactive-examples" title="Direct link to heading">#</a></h2><p>This introduction lets you get started immediately in your browser with interactive examples like this one:</p><div class="snack-player" data-snack-name="Hello World" data-snack-description="Example usage" data-snack-code="import%20React%20from%20'react'%3B%0Aimport%20%7B%20Text%2C%20View%20%7D%20from%20'react-native'%3B%0A%0Aconst%20YourApp%20%3D%20()%20%3D%3E%20%7B%0A%20%20return%20(%0A%20%20%20%20%3CView%20style%3D%7B%7B%20flex%3A%201%2C%20justifyContent%3A%20%22center%22%2C%20alignItems%3A%20%22center%22%20%7D%7D%3E%0A%20%20%20%20%20%20%3CText%3E%0A%20%20%20%20%20%20%20%20Try%20editing%20me!%20%F0%9F%8E%89%0A%20%20%20%20%20%20%3C%2FText%3E%0A%20%20%20%20%3C%2FView%3E%0A%20%20)%3B%0A%7D%0A%0Aexport%20default%20YourApp%3B" data-snack-platform="web" data-snack-supported-platforms="ios,android,web" data-snack-theme="light" data-snack-preview="true" data-snack-loading="lazy"></div><p>The above is a Snack Player. It’s a handy tool created by Expo to embed and run React Native projects and share how they render in platforms like Android and iOS. The code is live and editable, so you can play directly with it in your browser. Go ahead and try changing the "Try editing me!" text above to "Hello, world!"</p><blockquote><p>Optionally, if you want to setup a local development environment, <a href="/docs/environment-setup">you can follow our guide to setting up your environment on your local machine</a> and paste the code examples into your <code>App.js</code> file there. (If you are a web developer, you may already have a local environment set up for mobile browser testing!)</p></blockquote><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="function-components-and-class-components"></a>Function Components and Class Components<a aria-hidden="true" tabindex="-1" class="hash-link" href="#function-components-and-class-components" title="Direct link to heading">#</a></h2><p>With React, you can make components using either classes or functions. Originally, class components were the only components that could have state. But since the introduction of React's Hooks API, you can add state and more to function components.</p><p><a href="/blog/2019/03/12/releasing-react-native-059">Hooks were introduced in React Native 0.59.</a>, and because Hooks are the future-facing way to write your React components, we wrote this introduction using function component examples. Where useful, we also cover class components under a toggle like so:</p><div><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_3gSF tabs__item--active" style="outline:none">Function Component</li><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">Class Component</li></ul><div role="tabpanel" class="margin-vert--md"><div><div class="snack-player" data-snack-name="Hello World Function Component" data-snack-description="Example usage" data-snack-code="import%20React%20from%20'react'%3B%0Aimport%20%7B%20Text%2C%20View%20%7D%20from%20'react-native'%3B%0A%0Aconst%20HelloWorldApp%20%3D%20()%20%3D%3E%20%7B%0A%20%20return%20(%0A%20%20%20%20%3CView%20style%3D%7B%7B%0A%20%20%20%20%20%20%20%20flex%3A%201%2C%0A%20%20%20%20%20%20%20%20justifyContent%3A%20'center'%2C%0A%20%20%20%20%20%20%20%20alignItems%3A%20'center'%0A%20%20%20%20%20%20%7D%7D%3E%0A%20%20%20%20%20%20%3CText%3EHello%2C%20world!%3C%2FText%3E%0A%20%20%20%20%3C%2FView%3E%0A%20%20)%3B%0A%7D%0A%0Aexport%20default%20HelloWorldApp%3B" data-snack-platform="web" data-snack-supported-platforms="ios,android,web" data-snack-theme="light" data-snack-preview="true" data-snack-loading="lazy"></div></div></div></div><p>You can find more examples of class components in <a href="/versions">previous versions of this documentation</a>.</p><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="developer-notes"></a>Developer Notes<a aria-hidden="true" tabindex="-1" class="hash-link" href="#developer-notes" title="Direct link to heading">#</a></h2><p>People from many different development backgrounds are learning React Native. You may have experience with a range of technologies, from web to Android to iOS and more. We try to write for developers from all backgrounds. Sometimes we provide explanations specific to one platform or another like so:</p><div><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">Android</li><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">iOS</li><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_3gSF tabs__item--active" style="outline:none">Web</li></ul><div role="tabpanel" class="margin-vert--md"><div><blockquote><p>Web developers may be familiar with this concept.</p></blockquote></div></div></div><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="formatting"></a>Formatting<a aria-hidden="true" tabindex="-1" class="hash-link" href="#formatting" title="Direct link to heading">#</a></h2><p>Menu paths are written in bold and use carets to navigate submenus. Example: <strong>Android Studio > Preferences</strong></p><hr><p>Now that you know how this guide works, it's time to get to know the foundation of React Native: <a href="/docs/intro-react-native-components">Native Components</a>.</p></div></article><div class="docMetadata margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/facebook/react-native-website/blob/master/website/versioned_docs/version-0.63/introduction.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 40 40" style="margin-right:0.3em;vertical-align:sub"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col text--right"><em><small class="docMetadata-updated">Last updated on <time datetime="2020-12-26T13:17:12.000Z" class="docLastUpdatedAt_1gIo">12/26/2020</time></small></em></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/intro-react-native-components"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Core Components and Native Components »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_3iuQ"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#how-to-use-these-docs" class="table-of-contents__link">How to use these docs</a></li><li><a href="#prerequisites" class="table-of-contents__link">Prerequisites</a></li><li><a href="#interactive-examples" class="table-of-contents__link">Interactive examples</a></li><li><a href="#function-components-and-class-components" class="table-of-contents__link">Function Components and Class Components</a></li><li><a href="#developer-notes" class="table-of-contents__link">Developer Notes</a></li><li><a href="#formatting" class="table-of-contents__link">Formatting</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Docs</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/docs/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/tutorial">Tutorial</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/components-and-apis">Components and APIs</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/more-resources">More Resources</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">Community</h4><ul 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