gistfile1.js

var SupplementBox = React.createClass({

  render: function() {
    var content;

    if (this.props.selected_supplement == null || typeof this.props.selected_supplement.master === "undefined") {
      content = function(){
        return(
          <div></div>
        )
      };
    } else {
      content = function(){
        return(
          <div>
            <p>NOT EMPTY, HERE BE MENU :)</p>
          </div>
        )
      }
    }

    return (
      <div>
        { content }
      </div>
    )
  }
})