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://fb.me/react-with-addons-15.0.1.js"></script>
<script src="https://fb.me/react-dom-15.0.1.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration-babel.js"></script>

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

JavaScript 1.7

var Hello = React.createClass({
  render: function() {
    return ( <select onFocus={(e) => e.target.size = 5} onBlur={(e) => e.target.size = 1}
				>
          <option>1</option>
          <option>2</option>
          <option>3</option>
          <option>4</option>
          <option>5</option>
          <option>6</option>
          <option>7</option>
          <option>8</option>
          <option>9</option>
          <option>10</option>
          <option>11</option>
          <option>12</option>
          <option>13</option><option>14</option><option>15</option>
          <option>16</option>
          <option>17</option>
          <option>18</option>
          <option>19</option>
          <option>20</option>
          <option>21</option>
  </select>)
  }
});

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