text: let keys = {
      ESC: 27,
  };
  const burger = document.querySelector(".header-burger");
  const menu_close = document.querySelector('.header-menu__close');
  const menu = document.querySelector('.mob-menu');
  const menuLink = document.querySelectorAll('.mob-menu__link');
  
  function showMenu() {
      menu.classList.add('mob-menu__showed');
      document.addEventListener('keydown', function(e) {
          if (e.keyCode === keys.ESC) {
              closeMenu();
          }
      });
  }
  
  function closeMenu() {
      menu.classList.remove('mob-menu__showed');
  }
  
  burger.addEventListener('click', showMenu);
  menu_close.addEventListener('click', closeMenu);
  
  for (i = 0; i < menuLink.length; i++) {
      menuLink[i].addEventListener('click', closeMenu);
  }
  
  
  window.addEventListener('scroll', function() {
      if (pageYOffset > 100) {
  	burger.classList.add('header-burger_fixed')
      }
      else if (pageYOffset <= 100) {
  	burger.classList.remove('header-burger_fixed')
      }
  });
  