React Base Fiddle (JSX)

Starting point for creating JSFiddles with React. This uses React with Addons.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.24/browser.js"></script>
<script src="https://npmcdn.com/react@latest/dist/react-with-addons.js"></script>
<script src="https://npmcdn.com/react-dom@latest/dist/react-dom.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration-babel.js"></script>

<div id="app">
    <!-- This element's contents will be replaced with your component. -->
</div>

JavaScript 1.7

const Parent = React.createClass({
    getInitialState() {
        return {counters: [0,0,0]};
    },
    handleClick(index){
       let newCounterState = this.state.counters.map(() => 0);
       newCounterState[index] = this.state.counters[index] + 1 ;
       this.setState({counters : newCounterState})
    },
    render() {
        const rows = this.state.counters.map((value,index) => (
        	<Child key={index} handleClick={() => this.handleClick(index)} counter={value}/>
        ))
        return (
            <ul>
                {rows}
            </ul>
        );
    }
});

const Child = ({counter,handleClick}) => (
	<div onClick={handleClick}>
      {counter}
  </div>
)


ReactDOM.render(
    <Parent />,
    document.getElementById('app')
);