React HelloWOrld with state

HelloWorld.jsx

class HelloWorld extends React.Component {
  constructor(props) {
    super(props);
    this.state = {clicks: 0};
  }

  render() {
    return (
      <div>
        Hello, World! I am {this.props.name}
        <span>&nbsp;
          +{this.state.clicks}
        </span>
      </div>
    );
  }
};


React.render(<HelloWorld name="React"/>, document.getElementById('container-1'));

React.render(<HelloWorld name="React Native"/>, document.getElementById('container-2'));