React Base Fiddle (JSX)

Starting point for creating JSFiddles with React.

HTML

<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

Babel + JSX

class Count extends React.Component {
	
	render() {
  return <div>heyo {this.props.count}</div>
  }
}

class Button extends React.Component {
	render() {
	return <button onClick={this.props.onClick}>
  +</button>;
  }
}

class Hello extends React.Component {
	state = {
  count: 0
  }
  
  increment() {
  console.log("yo");
  	this.setState({count: this.state.count + 1})
  }
  render() {
    return <div> 
      <Count count={this.state.count}/>
      <Button  onClick={this.increment.bind(this)}/>
      </div>;
  }
}

ReactDOM.render(
  <Hello name="World" />,
  document.getElementById('container')
);