sample.js

// Utilized for mobile navigation and sticky nav when scrolling

jQuery(function ($) {
  if (document.documentElement.clientWidth >= 768) {
    if (window.location.pathname != '/work/') {
      var height = $(window).height();
      var siteHeader = document.getElementsByClassName('site-header')[0];
      siteHeader.style.height = height + 'px';
    }

    if (window.location.pathname != '/work/') {
      $(window).resize(function () {
          var height = $(window).height();
          var siteHeader = document.getElementsByClassName('site-header')[0];
          siteHeader.style.height = height + 'px';
        });
    }
  }

  $('#menu-main-menu li:first-child').before('<div class="blocker"><a href="/"></a></div>');

  $('#menu-main-menu').wrap('<div class="menu-container"></div>');

  $('header .genesis-nav-menu').before('<div id="responsive-menu-icon" class="closed"></div>');
  $('header .genesis-nav-menu').addClass('responsive-menu');

  $('#responsive-menu-icon').click(function () {
    $('header .genesis-nav-menu').slideToggle();
    $(this).toggleClass('open');
  });

  $(window).resize(function () {
    if (window.innerWidth > 600) {
      $('header .genesis-nav-menu').removeAttr('style');
    }
  });

  $(window).scroll(function () {
    var yPos = ($(window).scrollTop());
    if (document.documentElement.clientWidth > 768) {
      if (yPos > 0) {

        $('.menu-container').addClass('anchor');
        $('#menu-main-menu').addClass('wrap add-logo');

      } else {
        $('.menu-container').removeClass('anchor');
        $('#menu-main-menu').removeClass('wrap add-logo');
      }
    }
  });

  if (document.documentElement.clientWidth < 769) {

    $('.menu-container').addClass('anchor');
    $('#menu-main-menu').addClass('wrap');
  }
});