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 Hello extends React.Component {
  render() {

  	const items = [1,2,3,4,5]

    const rows = items.map((item, index) => index % 2 ? [] : items.slice(index, index + 2))
      .filter(row => row.length > 0)
      .map(row =>
         (
         <div className="bpa-module-tile-row">
           {row.map(x => "Item " + x)}
         </div>
         )
      );

    return <div>{rows}</div>;
  }
}

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