React Base Fiddle (JSX)

Starting point for creating JSFiddles with React. This uses React with Addons.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/JSXTransformer.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.1/react-with-addons.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration.js"></script>

JavaScript 1.7

var If = React.createClass({
    render: function() {
        if (this.props.test) {
            return this.props.children;
        }
        else {
            return false;
        }
    }
});

var App = React.createClass({
    render: function () {
        return (
            <div id="page">
                <If test={this.props.banner}>
                    {alert('This code is executed even though this.props.banner is undefined')}
                    <div id="banner">{this.props.banner.url}</div>
                </If>
                <div id="other-content">
                    blah blah blah...
                </div>
            </div>
        );
    }
});
 
React.render(<App />, document.body);