text: import React from 'react'
  import PropTypes from 'prop-types'
  import { Link } from 'gatsby'
  
  const Header = props => (
    <header id="header" className="alt">
      <nav>
        <a className="menu-link" onClick={props.onToggleMenu} href="javascript:;">
          Menu
        </a>
      </nav>
    </header>
  )
  
  Header.propTypes = {
    onToggleMenu: PropTypes.func,
  }
  
  export default Header
  