content: import React from 'react';
  import PropTypes from 'prop-types';
  
  const MenuButton = props => (
    <button
      aria-expanded={props.displayMenu}
      className={
        'toggle-button-nav' + (props.displayMenu ? ' reverse-toggle-color' : '')
      }
      onClick={props.onClick}
      ref={props.innerRef}
    >
      Menu
    </button>
  );
  
  MenuButton.displayName = 'MenuButton';
  MenuButton.propTypes = {
    className: PropTypes.string,
    displayMenu: PropTypes.bool.isRequired,
    innerRef: PropTypes.object,
    onClick: PropTypes.func.isRequired
  };
  
  export default MenuButton;
  