var Clicker = React.createClass({
  getInitialState: function() {
    return { clicks: 0 };
  },
  
  handleClick: function() {
    this.setState({ clicks: this.state.clicks+1 });
  },
  
  render: function() {
    return (<div class="clicker">
      <p>You clicked <span class="panel">{this.state.clicks}</span> times</p>
      <button onClick={this.handleClick}>Click Me</button>
    </div>);
  }
});

var App = React.createClass({
  render: function() {
    return <div>
      <Clicker />
      <Clicker />
      <Clicker />
      <Clicker />
      <Clicker />
      <Clicker />
    </div>
  }
});

ReactDOM.render(<App />, document.querySelector('main'));