mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Dan Abramov
443 lines
18 KiB
HTML
443 lines
18 KiB
HTML
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<!DOCTYPE html>
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<!--[if IE]><![endif]-->
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<html>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<title>Installation - React</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta property="og:title" content="Installation - React">
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<meta property="og:url" content="https://facebook.github.io/react/docs/installation.html">
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<meta property="og:image" content="https://facebook.github.io/react/img/logo_og.png">
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<meta property="og:description" content="A JavaScript library for building user interfaces">
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<link rel="shortcut icon" href="/react/favicon.ico">
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<script src="/react/js/react.js"></script>
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<script src="/react/js/react-dom.js"></script>
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<script src="/react/js/babel.min.js"></script>
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<script src="/react/js/live_editor.js"></script>
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</head>
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<body>
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<div class="container">
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<div class="nav-main">
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<div class="wrap">
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<a class="nav-home" href="/react/index.html">
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<img class="nav-logo" src="/react/img/logo.svg" width="36" height="36">
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React
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</a>
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<div class="nav-lists">
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<ul class="nav-site nav-site-internal">
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<li><a href="/react/docs/hello-world.html" class="active">Docs</a></li>
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<li><a href="/react/tutorial/tutorial.html">Tutorial</a></li>
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<li><a href="/react/community/support.html">Community</a></li>
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<li><a href="/react/blog/">Blog</a></li>
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<li class="nav-site-search">
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<input id="algolia-doc-search" type="text" placeholder="Search docs..." />
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</ul>
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<ul class="nav-site nav-site-external">
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<li><a href="https://github.com/facebook/react">GitHub</a></li>
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<li><a href="https://facebook.github.io/react-native/">React Native</a></li>
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</ul>
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</div>
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</div>
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</div>
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<section class="content wrap documentationContent">
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<div class="inner-content">
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<a class="edit-page-link" href="https://github.com/facebook/react/tree/master/docs/docs/installation.md" target="_blank">Edit on GitHub</a>
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<h1>
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Installation
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</h1>
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<div class="subHeader"></div>
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<p>React is flexible and can be used in a variety of projects. You can create new apps with it, but you can also gradually introduce it into an existing codebase without doing a rewrite.</p>
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<h2><a class="anchor" name="trying-out-react"></a>Trying Out React <a class="hash-link" href="#trying-out-react">#</a></h2>
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<p>If you're just interested in playing around with React, you can use CodePen. Try starting from <a href="http://codepen.io/gaearon/pen/rrpgNB?editors=0010">this Hello World example code</a>. You don't need to install anything; you can just modify the code and see if it works.</p>
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<p>If you prefer to use your own text editor, you can also <a href="/react/downloads/single-file-example.html" download="hello.html">download this HTML file</a>, edit it, and open it from the local filesystem in your browser. It does a slow runtime code transformation, so don't use it in production.</p>
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<h2><a class="anchor" name="creating-a-single-page-application"></a>Creating a Single Page Application <a class="hash-link" href="#creating-a-single-page-application">#</a></h2>
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<p><a href="http://github.com/facebookincubator/create-react-app">Create React App</a> is the best way to starting building a new React single page application. It sets up your development environment so that you can use the latest JavaScript features, provides a nice developer experience, and optimizes your app for production.</p>
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<div class="highlight"><pre><code class="language-bash" data-lang="bash">npm install -g create-react-app
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create-react-app hello-world
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<span class="nb">cd </span>hello-world
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npm start
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</code></pre></div>
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<p>Create React App doesn't handle backend logic or databases; it just creates a frontend build pipeline, so you can use it with any backend you want. It uses Webpack, Babel and ESLint under the hood, but configures them for you.</p>
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<h2><a class="anchor" name="adding-react-to-an-existing-application"></a>Adding React to an Existing Application <a class="hash-link" href="#adding-react-to-an-existing-application">#</a></h2><h3><a class="anchor" name="using-npm"></a>Using npm <a class="hash-link" href="#using-npm">#</a></h3>
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<p>We recommend using React from npm with a bundler like <a href="http://browserify.org/">Browserify</a> or <a href="https://webpack.github.io/">webpack</a>. If you use npm for client package management, you can install React with:</p>
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<div class="highlight"><pre><code class="language-bash" data-lang="bash">npm install --save react react-dom
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</code></pre></div>
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<p>and import it from your code with something like:</p>
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<div class="highlight"><pre><code class="language-js" data-lang="js"><span class="kr">import</span> <span class="nx">React</span> <span class="nx">from</span> <span class="s1">'react'</span><span class="p">;</span>
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<span class="kr">import</span> <span class="nx">ReactDOM</span> <span class="nx">from</span> <span class="s1">'react-dom'</span><span class="p">;</span>
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<span class="nx">ReactDOM</span><span class="p">.</span><span class="nx">render</span><span class="p">(</span>
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<span class="o"><</span><span class="nx">h1</span><span class="o">></span><span class="nx">Hello</span><span class="p">,</span> <span class="nx">world</span><span class="o">!<</span><span class="err">/h1>,</span>
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<span class="nb">document</span><span class="p">.</span><span class="nx">getElementById</span><span class="p">(</span><span class="s1">'root'</span><span class="p">)</span>
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<span class="p">);</span>
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</code></pre></div>
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<p>This code renders into an HTML element with the id of <code>root</code> so you need <code><div id="root"></div></code> somewhere in your HTML file. When you use React in this way, you should be transpiling your JavaScript using Babel with the <code>es2015</code> and <code>react</code> presets. To use React in production mode, set the environment variable <code>NODE_ENV</code> to <code>"production"</code>.</p>
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<p>If you use Bower, React is available via the <code>react</code> package.</p>
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<h3><a class="anchor" name="enabling-es6-and-jsx"></a>Enabling ES6 and JSX <a class="hash-link" href="#enabling-es6-and-jsx">#</a></h3>
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<p>We recommend using React with Babel to let you use ES6 and JSX in your JavaScript code. ES6 is a set of modern JavaScript features that make development easier, and JSX is an extension to the JavaScript language that works nicely with React. The <a href="https://babeljs.io/docs/setup/">Babel setup instructions</a> explain how to configure Babel in many different build environments. Make sure you install <code>babel-preset-react</code> and <code>babel-preset-es2015</code> and enable them in your <code>.babelrc</code>, and you're good to go.</p>
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<h3><a class="anchor" name="using-a-cdn"></a>Using a CDN <a class="hash-link" href="#using-a-cdn">#</a></h3>
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<p>If you don't want to use npm to manage client packages, the <code>react</code> and <code>react-dom</code> npm packages also provide UMD distributions in <code>dist</code> folders, which are hosted on a CDN:</p>
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<div class="highlight"><pre><code class="language-html" data-lang="html"><span class="nt"><script </span><span class="na">src=</span><span class="s">"https://unpkg.com/react@15/dist/react.js"</span><span class="nt">></script></span>
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<span class="nt"><script </span><span class="na">src=</span><span class="s">"https://unpkg.com/react-dom@15/dist/react-dom.js"</span><span class="nt">></script></span>
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</code></pre></div>
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<p>To load a specific version of <code>react</code> and <code>react-dom</code>, replace <code>15</code> with the version number.</p>
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<p>Minified production versions of React are available at:</p>
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<div class="highlight"><pre><code class="language-html" data-lang="html"><span class="nt"><script </span><span class="na">src=</span><span class="s">"https://unpkg.com/react@15/dist/react.min.js"</span><span class="nt">></script></span>
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<span class="nt"><script </span><span class="na">src=</span><span class="s">"https://unpkg.com/react-dom@15/dist/react-dom.min.js"</span><span class="nt">></script></span>
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</code></pre></div>
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<div class="docs-prevnext">
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<a class="docs-next" href="/react/docs/hello-world.html">Next →</a>
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</div>
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</div>
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<div class="nav-docs">
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<!-- Docs Nav -->
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<div class="nav-docs-section">
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<h3>Quick Start</h3>
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<ul>
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<li>
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<a href="/react/docs/installation.html" class="active">Installation</a>
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</li>
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<li>
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<a href="/react/docs/hello-world.html">Hello World</a>
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</li>
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<li>
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<a href="/react/docs/introducing-jsx.html">Introducing JSX</a>
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</li>
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<li>
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<a href="/react/docs/rendering-elements.html">Rendering Elements</a>
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</li>
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<li>
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<a href="/react/docs/components-and-props.html">Components and Props</a>
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</li>
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<li>
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<a href="/react/docs/state-and-lifecycle.html">State and Lifecycle</a>
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</li>
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<li>
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<a href="/react/docs/handling-events.html">Handling Events</a>
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</li>
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<li>
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<a href="/react/docs/conditional-rendering.html">Conditional Rendering</a>
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</li>
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<li>
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<a href="/react/docs/lists-and-keys.html">Lists and Keys</a>
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</li>
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<li>
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<a href="/react/docs/forms.html">Forms</a>
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</li>
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<li>
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<a href="/react/docs/lifting-state-up.html">Lifting State Up</a>
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</li>
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<li>
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<a href="/react/docs/composition-vs-inheritance.html">Composition vs Inheritance</a>
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</li>
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<li>
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<a href="/react/docs/thinking-in-react.html">Thinking In React</a>
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</li>
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</ul>
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</div>
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<div class="nav-docs-section">
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<h3>Advanced Guides</h3>
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<ul>
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<li>
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<a href="/react/docs/jsx-in-depth.html">JSX In Depth</a>
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</li>
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<li>
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<a href="/react/docs/typechecking-with-proptypes.html">Typechecking With PropTypes</a>
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</li>
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<li>
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<a href="/react/docs/refs-and-the-dom.html">Refs and the DOM</a>
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</li>
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<li>
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<a href="/react/docs/optimizing-performance.html">Optimizing Performance</a>
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</li>
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<li>
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<a href="/react/docs/react-without-es6.html">React Without ES6</a>
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</li>
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<li>
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<a href="/react/docs/react-without-jsx.html">React Without JSX</a>
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</li>
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<li>
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<a href="/react/docs/reconciliation.html">Reconciliation</a>
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<li>
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<a href="/react/docs/context.html">Context</a>
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<li>
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<a href="/react/docs/web-components.html">Web Components</a>
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</li>
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</ul>
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</div>
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<div class="nav-docs-section">
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<h3>Reference</h3>
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<ul>
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<li>
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<a href="/react/docs/react-api.html">React</a>
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<ul>
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<li>
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<a href="/react/docs/react-component.html">React.Component</a>
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</ul>
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</li>
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<li>
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<a href="/react/docs/react-dom.html">ReactDOM</a>
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</li>
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<li>
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<a href="/react/docs/react-dom-server.html">ReactDOMServer</a>
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</li>
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<li>
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<a href="/react/docs/dom-elements.html">DOM Elements</a>
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</li>
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<li>
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<a href="/react/docs/events.html">SyntheticEvent</a>
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</li>
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<li>
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<a href="/react/docs/addons.html">Add-Ons</a>
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<ul>
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<li>
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<a href="/react/docs/perf.html">Performance Tools</a>
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</li>
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<li>
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<a href="/react/docs/test-utils.html">Test Utilities</a>
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</li>
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<li>
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<a href="/react/docs/animation.html">Animation</a>
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</li>
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<li>
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<a href="/react/docs/create-fragment.html">Keyed Fragments</a>
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</li>
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<li>
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<a href="/react/docs/update.html">Immutability Helpers</a>
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</li>
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<li>
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<a href="/react/docs/pure-render-mixin.html">PureRenderMixin</a>
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</li>
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<li>
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<a href="/react/docs/shallow-compare.html">Shallow Compare</a>
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</li>
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<li>
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<a href="/react/docs/two-way-binding-helpers.html">Two-way Binding Helpers</a>
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</li>
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</ul>
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<!-- Contributing Nav -->
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<h3>Contributing</h3>
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<ul>
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<li>
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<a href="/react/contributing/how-to-contribute.html">How to Contribute</a>
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<li>
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<a href="/react/contributing/codebase-overview.html">Codebase Overview</a>
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</li>
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<li>
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<a href="/react/contributing/implementation-notes.html">Implementation Notes</a>
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</li>
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<li>
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<a href="/react/contributing/design-principles.html">Design Principles</a>
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</li>
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</ul>
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</div>
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</div>
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</section>
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<footer class="nav-footer">
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<section class="sitemap">
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<a href="/react/" class="nav-home">
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<h5><a href="/react/docs/">Docs</a></h5>
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<a href="/react/docs/hello-world.html">Quick Start</a>
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<a href="/react/docs/thinking-in-react.html">Thinking in React</a>
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<a href="/react/tutorial/tutorial.html">Tutorial</a>
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<a href="/react/docs/jsx-in-depth.html">Advanced Guides</a>
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<div>
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<h5><a href="/react/community/support.html">Community</a></h5>
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<a href="http://stackoverflow.com/questions/tagged/reactjs" target="_blank">Stack Overflow</a>
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<a href="https://discuss.reactjs.org/" target="_blank">Discussion Forum</a>
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<a href="https://discord.gg/0ZcbPKXt5bZjGY5n" target="_blank">Reactiflux Chat</a>
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<a href="https://www.facebook.com/react" target="_blank">Facebook</a>
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<a href="https://twitter.com/reactjs" target="_blank">Twitter</a>
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<div>
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<h5><a href="/react/community/support.html">Resources</a></h5>
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<a href="/react/community/conferences.html">Conferences</a>
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<a href="/react/community/videos.html">Videos</a>
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<a href="https://github.com/facebook/react/wiki/Examples" target="_blank">Examples</a>
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<a href="https://github.com/facebook/react/wiki/Complementary-Tools" target="_blank">Complementary Tools</a>
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</div>
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<div>
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<h5>More</h5>
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<a href="/react/blog/">Blog</a>
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<a href="https://github.com/facebook/react" target="_blank">GitHub</a>
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<a href="http://facebook.github.io/react-native/" target="_blank">React Native</a>
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<a href="/react/acknowledgements.html">Acknowledgements</a>
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</div>
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</section>
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<a href="https://code.facebook.com/projects/" target="_blank" class="fbOpenSource">
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<img src="/react/img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"/>
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Copyright © 2016 Facebook Inc.
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