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Getting Started Edit on GitHub

JSFiddle #

The easiest way to start hacking on React is using the following JSFiddle Hello World examples:

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.

<!DOCTYPE html><html><head><script src="build/react.js"></script><script src="build/JSXTransformer.js"></script></head><body><divid="example"></div><script type="text/jsx">React.render(<h1>Hello,world!</h1>,document.getElementById('example'));</script></body></html>

The XML syntax inside of JavaScript is called JSX; check out the JSX syntax to learn more about it. In order to translate it to vanilla JavaScript we use <script type="text/jsx"> and include JSXTransformer.js to actually perform the transformation in the browser.

Separate File #

Your React JSX code can live in a separate file. Create the following src/helloworld.js.

React.render(<h1>Hello,world!</h1>,document.getElementById('example'));

Then reference it from helloworld.html:

<script type="text/jsx"src="src/helloworld.js"></script>

Offline Transform #

First install the command-line tools (requires npm):

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.

React.render(React.createElement('h1',null,'Hello, world!'),document.getElementById('example'));

Update your HTML file as below:

<!DOCTYPE html><html><head><title>Hello React!</title><script src="build/react.js"></script><!-- No need for JSXTransformer! --></head><body><divid="example"></div><script src="build/helloworld.js"></script></body></html>

Want CommonJS? #

If you want to use React with browserify, webpack, or another CommonJS-compatible module system, just use the react npm package. In addition, the jsx build tool can be integrated into most packaging systems (not just CommonJS) quite easily.

Next Steps #

Check out the tutorial and the other examples in the starter kit's examples directory to learn more.

We also have a wiki where the community contributes with workflows, UI-components, routing, data management etc.

Good luck, and welcome!

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