Right now we use codemirror's JavaScript mode on the website but there's a JSX mode now so we should start using that instead.

Compiled JS
      </div>;
    var JSXTab =
      <div
        className={JSXTabClassName}
        onClick={this.handleCodeModeSwitch.bind(this, this.MODES.JSX)}>
          {this.props.editorTabTitle}
      </div>
    return (
      <div className="playground">
        <div>
          {JSXTab}
          {this.props.showCompiledJSTab && JSTab}
        </div>
        <div className="playgroundCode">
          {isJS ? JSContent : JSXContent}
        </div>
        <div className="playgroundPreview">
          <div ref="mount" />
        </div>
      </div>
    );
  },
  componentDidMount: function() {
    this.executeCode();
  },
  componentDidUpdate: function(prevProps, prevState) {
    
    
    if (this.props.transformer !== prevProps.transformer ||