(() => {
  let menuBurger = document.getElementById('menu-burger');
  let menuWrap = document.getElementById('menu-wrap');

  if ( menuBurger != undefined && menuWrap != undefined ) {
    menuBurger.onclick = () => {
      menuBurger.classList.toggle('burger-open');
      menuWrap.classList.toggle('menu-wrap-open');
    };
  }
})();

(() => {
  let menuBurger = document.getElementById('menu-burger');
  let menuWrap = document.getElementsByClassName('menu-wrap');

  if ( menuBurger != undefined && menuWrap != undefined && menuWrap.length > 0 ) {
    menuBurger.onclick = () => {
      menuBurger.classList.toggle('burger-open');
      menuWrap[0].classList.toggle('menu-wrap-open');
    };
  }
})();

(() => {
  let menuBurger = document.getElementsByClassName('menu-burger');
  let menuWrap = document.getElementsByClassName('menu-wrap');

  if ( menuBurger != undefined && menuBurger.length > 0 && menuWrap != undefined && menuWrap.length > 0 ) {
    menuBurger[0].onclick = () => {
      menuBurger[0].classList.toggle('burger-open');
      menuWrap[0].classList.toggle('menu-wrap-open');
    };
  }
})();