reactJsHelloWorld.js

//ReactJs
var HelloMessage = React.createClass({
  render: function() {
    return <div>Hello {this.props.name}</div>;
  }
});
ReactDOM.render(<HelloMessage name="Hieu Tam" />, mountNode);

//React Native
class HelloMessage extends Component {
  render() {
    return (
      <View><Text>Hello {this.props.name}</Text></View>
    );}
}
AppRegistry.registerComponent('Hieu Tam', () => HelloMessage);