Setting state

"We might need to update the initial state based on some user events. Updating state is also easy using the setState() function." informed Mike.

var App = React.createClass({
  getInitialState: function() {
    return {
      changeSets: [],
      headings: ['Updated At', 'Author', 'Change']
    };
  },
  
  handleEvent: function(data) {
    this.setState({ changeSets: data.changeSets });
  },
  
  render: function(){
    …    
});