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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Supported Browsers and Features · Create React App</title><meta name="viewport" content="width=device-width"/><meta name="generator" content="Docusaurus"/><meta name="description" content="<h2><a class="anchor" aria-hidden="true" id="supported-browsers"></a><a href="#supported-browsers" 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>Supported Browsers</h2>
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</script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/"><img class="logo" src="/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"><a href="/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 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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="/docs/can-i-use-decorators">Can I Use Decorators?</a></li><li class="navListItem"><a class="navItem" href="/docs/pre-rendering-into-static-html-files">Pre-Rendering Static HTML</a></li><li class="navListItem"><a class="navItem" href="/docs/advanced-configuration">Advanced Configuration</a></li><li class="navListItem"><a class="navItem" href="/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 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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/supported-browsers-features.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Supported Browsers and Features</h1></header><article><div><span><h2><a class="anchor" aria-hidden="true" id="supported-browsers"></a><a href="#supported-browsers" 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>Supported Browsers</h2>
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<p>By default, the generated project supports all modern browsers. Support for Internet Explorer 9, 10, and 11 requires polyfills. For a set of polyfills to support older browsers, use <a href="https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md">react-app-polyfill</a>.</p>
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<h2><a class="anchor" aria-hidden="true" id="supported-language-features"></a><a href="#supported-language-features" 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>Supported Language Features</h2>
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<p>This project supports a superset of the latest JavaScript standard. In addition to <a href="https://github.com/lukehoban/es6features">ES6</a> syntax features, it also supports:</p>
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<ul>
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<li><a href="https://github.com/rwaldron/exponentiation-operator">Exponentiation Operator</a> (ES2016).</li>
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<li><a href="https://github.com/tc39/ecmascript-asyncawait">Async/await</a> (ES2017).</li>
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<li><a href="https://github.com/tc39/proposal-object-rest-spread">Object Rest/Spread Properties</a> (ES2018).</li>
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<li><a href="https://github.com/tc39/proposal-dynamic-import">Dynamic import()</a> (stage 3 proposal)</li>
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<li><a href="https://github.com/tc39/proposal-class-public-fields">Class Fields and Static Properties</a> (part of stage 3 proposal).</li>
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<li><a href="https://facebook.github.io/react/docs/introducing-jsx.html">JSX</a>, <a href="./adding-flow">Flow</a> and <a href="./adding-typescript">TypeScript</a>.</li>
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</ul>
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<p>Learn more about <a href="https://tc39.github.io/process-document/">different proposal stages</a>.</p>
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<p>While we recommend using experimental proposals with some caution, Facebook heavily uses these features in the product code, so we intend to provide <a href="https://medium.com/@cpojer/effective-javascript-codemods-5a6686bb46fb">codemods</a> if any of these proposals change in the future.</p>
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<p>Note that <strong>this project includes no <a href="https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md">polyfills</a></strong> by default.</p>
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<p>If you use any other ES6+ features that need <strong>runtime support</strong> (such as <code>Array.from()</code> or <code>Symbol</code>), make sure you are <a href="https://github.com/facebook/create-react-app/blob/master/packages/react-app-polyfill/README.md">including the appropriate polyfills manually</a>, or that the browsers you are targeting already support them.</p>
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<h2><a class="anchor" aria-hidden="true" id="configuring-supported-browsers"></a><a href="#configuring-supported-browsers" 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>Configuring Supported Browsers</h2>
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<p>By default, the generated project includes a <a href="https://github.com/browserslist/browserslist"><code>browserslist</code></a> configuration in your <code>package.json</code> file to target a broad range of browsers based on global usage (<code>> 0.2%</code>) for production builds, and modern browsers for development. This gives a good development experience, especially when using language features such as async/await, but still provides high compatibility with many browsers in production.</p>
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<p>The <code>browserslist</code> configuration controls the outputted JavaScript so that the emitted code will be compatible with the browsers specified. The <code>production</code> list will be used when creating a production build by running the <code>build</code> script, and the <code>development</code> list will be used when running the <code>start</code> script. You can use <a href="https://browserl.ist/?q=%3E+0.2%25%2C+not+dead%2C+not+op_mini+all">https://browserl.ist</a> to see the browsers supported by your configured <code>browserslist</code>.</p>
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<p>Here is an example <code>browserslist</code> that is specified in <code>package.json</code>:</p>
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<pre><code class="hljs css language-json">"browserslist": {
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"production": [
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">0.2%",
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"not dead",
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"not op_mini all"
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],
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"development": [
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"last 1 chrome version",
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"last 1 firefox version",
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"last 1 safari version"
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]
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}
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</code></pre>
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<blockquote>
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<p>Note that this does not include polyfills automatically for you. You will still need to polyfill language features (see above) as needed based on the browsers your are supporting.</p>
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</blockquote>
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<blockquote>
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<p>When editing the <code>browserslist</code> config, you may notice that your changes don't get picked up right away. This is due to an <a href="https://github.com/babel/babel-loader/issues/690">issue in babel-loader</a> not detecting the change in your <code>package.json</code>. An easy solution is to delete the <code>node_modules/.cache</code> folder and try again.</p>
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</blockquote>
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</span></div></article></div><div class="docLastUpdate"><em>Last updated on 5/16/2019 by Amy Lam</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/available-scripts"><span class="arrow-prev">← </span><span>Available Scripts</span></a><a class="docs-next button" href="/docs/updating-to-new-releases"><span>Updating to New Releases</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#supported-browsers">Supported Browsers</a></li><li><a href="#supported-language-features">Supported Language Features</a></li><li><a href="#configuring-supported-browsers">Configuring Supported Browsers</a></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/logo.svg" alt="Create React App" width="66" height="58"/></a><div><h5>Docs</h5><a href="/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/create-react-app" 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="/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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