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---
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id: getting-started-zh-CN
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title: 入门教程
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permalink: getting-started-zh-CN.html
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next: tutorial-zh-CN.html
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redirect_from: "docs/index-zh-CN.html"
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---
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## JSFiddle
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开始 Hack React 的最简单的方法是用下面 JSFiddle 的Hello Worlds：
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* **[React JSFiddle](https://jsfiddle.net/reactjs/69z2wepo/)**
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* [React JSFiddle without JSX](https://jsfiddle.net/reactjs/5vjqabv3/)
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## 通过 npm 使用 React
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我们建议在 React 中使用 CommonJS 模块系统，比如 [browserify](http://browserify.org/) 或 [webpack](https://webpack.github.io/)。使用 [`react`](https://www.npmjs.com/package/react) 和 [`react-dom`](https://www.npmjs.com/package/react-dom) npm 包.
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```js
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// main.js
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var React = require('react');
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var ReactDOM = require('react-dom');
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ReactDOM.render(
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<h1>Hello, world!</h1>,
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document.getElementById('example')
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);
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```
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在安装 browserify 之后安装 React DOM 和构建你的应用包。
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```sh
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$ npm install --save react react-dom
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$ browserify -t babelify main.js -o bundle.js
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```
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## 不使用 npm 快速开始
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If you're not ready to use npm yet, you can download the starter kit which includes prebuilt copies of React and React DOM.
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如果你没有做好使用 npm 的准备，你可以下载包含了 React 和 ReactDOM 预生成包的入门教程包。
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<div class="buttons-unit downloads">
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<a href="/react/downloads/react-{{site.react_version}}.zip" class="button">
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下载入门教程 {{site.react_version}}
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</a>
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</div>
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在入门教程包的根目录，创建一个含有如下代码的 `helloworld.html`。
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<title>Hello React!</title>
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<script src="build/react.js"></script>
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<script src="build/react-dom.js"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
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</head>
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<body>
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<div id="example"></div>
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<script type="text/babel">
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ReactDOM.render(
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<h1>Hello, world!</h1>,
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document.getElementById('example')
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);
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</script>
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</body>
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</html>
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```
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在 JavaScript 代码里写着 XML 格式的代码称为 JSX；可以去 [JSX 语法](/react/docs/jsx-in-depth.html) 里学习更多 JSX 相关的知识。为了把 JSX 转成标准的 JavaScript，我们用 `<script type="text/babel">` 标签，并引入 Babel 来完成在浏览器里的代码转换。
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### 分离文件
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你的 React JSX 代码文件可以写在另外的文件里。新建下面的 `src/helloworld.js`。
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```javascript
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ReactDOM.render(
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<h1>Hello, world!</h1>,
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document.getElementById('example')
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);
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```
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然后在 `helloworld.html` 引用该文件：
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```html{10}
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<script type="text/babel" src="src/helloworld.js"></script>
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```
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注意一些浏览器（比如 Chrome ）会在使用 HTTP 以外的协议加载文件时失败。
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### 离线转换
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先安装[Babel](http://babeljs.io/)命令行工具（依赖 [npm](https://www.npmjs.com/)）：
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```
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npm install --global babel
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```
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然后把你的 `src/helloworld.js` 文件转成标准的 JavaScript:
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```
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babel src --watch --out-dir build
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```
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`build/helloworld.js` 会在你对文件进行修改时自动生成。 阅读 [Babel CLI 文档](http://babeljs.io/docs/usage/cli/) 了解高级用法。
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```javascript{2}
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ReactDOM.render(
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React.createElement('h1', null, 'Hello, world!'),
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document.getElementById('example')
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);
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```
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对照下面更新你的 HTML 代码
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```html{7,11}
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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<title>Hello React!</title>
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<script src="build/react.js"></script>
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<!-- 不需要 Babel！ -->
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</head>
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<body>
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<div id="example"></div>
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<script src="build/helloworld.js"></script>
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</body>
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</html>
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```
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## 下一步
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去看看[入门教程](/react/docs/tutorial.html) 和入门教程包 `examples` 目录下的其它例子学习更多。
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我们还有一个社区开发者共建的 Wiki：[workflows, UI-components, routing, data management etc.](https://github.com/facebook/react/wiki/Complementary-Tools)
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恭喜你，欢迎来到 React 的世界。
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