View.js

var Store = require('Store');

var DemoApp = React.createClass({
  componentDidMount: function() {
    Store.addChangeListener(this._onChange);
  }
  componentWillUnmount: function() {
    Store.removeChangeListener(this._onChange);
  }
  render: function() {
    return (
      <div>
        Hello
      </div>
    );
  }
});

_onChange: function() {
    //some functionality
  }

module.exports = DemoApp;