var data = 123;
 
  var MyTitle = React.createClass({
 
    propTypes: {
 
      title: React.PropTypes.string.isrequired,},render: function() {
      return <h1> {this.props.title} </h1>;
    }
  });
 
  ReactDOM.render(
    <MyTitle title={data} />,document.body
  );