---
id: getting-started
title: Getting Started
layout: docs
next: tutorial.html
---
## JSFiddle
The easiest way to start hacking on React is using the following JSFiddle Hello Worlds
* **[React JSFiddle](http://jsfiddle.net/vjeux/kb3gN/)**
* [React JSFiddle without JSX](http://jsfiddle.net/vjeux/VkebS/)
## Starter Kit
Download the starter kit to get started.
In the root directory of the starter kit, create a `helloworld.html` with the following contents.
```html
```
The XML syntax inside of JavaScript is called JSX; check out the [JSX syntax](jsx-in-depth.html) to learn more about it. In order to translate it to vanilla JavaScript we use `
```
### Offline Transform
First install the command-line tools (requires [npm](http://npmjs.org/)):
```
npm install -g react-tools
```
Then, translate your `src/helloworld.js` file to plain JavaScript:
```
jsx --watch src/ build/
```
The file `build/helloworld.js` is autogenerated whenever you make a change.
```javascript{3}
/** @jsx React.DOM */
React.renderComponent(
React.DOM.h1(null, 'Hello, world!'),
document.getElementById('example')
);
```
> Note:
>
> The comment parser is very strict right now, in order for it to pick up the `@jsx` modifier, two conditions are required. The `@jsx` comment block must be the first comment on the file. The comment must start with `/**` (`/*` and `//` will not work). If the parser can't find the `@jsx` comment, it will output the file without transforming it.
Update your HTML file as below:
```html{6,10}
Hello React!
```
## Want CommonJS?
If you want to use React within a module system, [fork our repo](http://github.com/facebook/react), `npm install` and run `grunt`. A nice set of CommonJS modules will be generated. Our `jsx` build tool can be integrated into most packaging systems (not just CommonJS) quite easily.
## Next Steps
Check out [the tutorial](tutorial.html) and the other examples in the `/examples` directory to learn more. Good luck, and welcome!