Counter Component in React

counter.jsx

var Counter = React.createClass({
	getInitialState: function() {
  	return {
    	count: 0
    }
  },
  incrementCount: function() {
  	this.setState({
    	count: this.state.count + 1
    })
  },
  decrementCount: function() {
  	this.setState({
    	count: this.state.count - 1
    })
  },
  render: function() {
    return (
    	<div>
      	<div>{this.state.count}</div>
        <button onClick={this.decrementCount}> - </button>
        <button onClick={this.incrementCount}> + </button>
      </div>
    )
  }
});

ReactDOM.render(
  <Counter />,
  document.getElementById('container')
);