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CDN-hosted React
We provide CDN-hosted versions of React on our download page. These pre-built files use the UMD module format. Dropping them in with a simple <script> tag will inject the React and ReactDOM globals into your environment. It should also work out-of-the-box in CommonJS and AMD environments.
Using React from npm
You can also use React with a CommonJS module system like browserify or webpack. Just use react and react-dom npm packages.
/** main.js */
var React = require('react');
var ReactDOM = require('react-dom');
ReactDOM.render(
<h1>Hello, world!</h1>,
document.getElementById('example')
);
Configure babel with a .babelrc file:
{
"presets": ["react"]
}
Note:
If you are using ES2015, you will want to also use the
babel-preset-es2015package.
To install React DOM and build your bundle with browserify:
$ npm install --save react react-dom babelify babel-preset-react
$ browserify -t [ babelify ] main.js -o bundle.js
To install React DOM and build your bundle with webpack:
$ npm install --save react react-dom babel-preset-react babel-loader babel-core
$ webpack main.js bundle.js --module-bind 'js=babel-loader'
Notice that: by default, React will be in development mode, which is slower, and not advised for production. To use React in production mode, set the environment variable NODE_ENV to production (using envify or webpack's DefinePlugin). For example:
new webpack.DefinePlugin({
"process.env": {
NODE_ENV: JSON.stringify("production")
}
});
Using React from Bower
Bower is a package manager optimized for the front-end development. If multiple packages depend on a package - jQuery for example - Bower will download jQuery just once. This is known as a flat dependency graph and it helps reduce page load.
If you'd like to use bower, it's as easy as:
$ bower install --save react
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Hello React!</title>
<script src="bower_components/react/react.js"></script>
<script src="bower_components/react/react-dom.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.34/browser.min.js"></script>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
ReactDOM.render(
<h1>Hello, world!</h1>,
document.getElementById('example')
);
</script>
</body>
</html>
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