gistfile1.js

var linkbot = ...;

var LinkbotWheels = React.createClass({
  // Update the component's state on every Linkbot event
  componentWillMount: function() {
    var me = this;
    linkbot.register({
      wheel: {
        3: {
          callback: function(wheelEv) {
            me.setState({ wheelPositions: wheelEv.positions });
        }}
      }
    });
  },
  // Set the initial state synchronously
  getInitialState: function() {
    return {
      wheelPositions: linkbot.wheelPositions()
    };
  },
  render: function() {
    var tableRows = this.state.wheelPositions.map(function(pos, idx) {
      return (
        <tr key={idx}>
          <td>Wheel {idx}</td>
          <td>{pos}</td>
        </tr>
      );
    });
    return (
      <table>
        {tableRows}
      </table>
    );
  }
});