js correction for IAI template

templates/templates-parts/iai/footer-javascript.php

@@ -78,40 +78,42 @@
                     $('.iai-nav').removeClass('opened');
                 });
 
-                $(window).on("scroll", function()
-                {
-                    var scrolltop = $(this).scrollTop();
-
-                    if ((scrolltop > 0) && ! $body.hasClass('sticky')) {
-                        $body.addClass('sticky');
-                    } else if (scrolltop === 0) {
-                        $body.removeClass('sticky');
-                    }
-
-                    scrolltop += 330;
-
-                    var prevActiveMenu = $('.iai-nav-item.iai-nav-item-active').index();
-                    var activeMenu = 0;
-
-                    // console.log( $(this).scrollTop()+ 330, anchor2.offset().top );
-
-                    if (scrolltop > anchor4.offset().top ) {
-                        activeMenu = 3;
-                    } else if (scrolltop > anchor3.offset().top ) {
-                        activeMenu = 2;
-                    } else if (scrolltop > anchor2.offset().top ) {
-                        activeMenu = 1;
-                    } else if (scrolltop > anchor1.offset().top ) {
-                        activeMenu = 0;
-                    }
-
-                    if (prevActiveMenu !== activeMenu) {
-                        $('.iai-nav-item').removeClass('iai-nav-item-active');
-                        var activeElement = $('.iai-nav-item').get(activeMenu);
-                        $(activeElement).addClass('iai-nav-item-active');
-                    }
-
-                });
+                if(anchor1 && anchor2 && anchor3 && anchor4){
+                  $(window).on("scroll", function()
+                  {
+                      var scrolltop = $(this).scrollTop();
+
+                      if ((scrolltop > 0) && ! $body.hasClass('sticky')) {
+                          $body.addClass('sticky');
+                      } else if (scrolltop === 0) {
+                          $body.removeClass('sticky');
+                      }
+
+                      scrolltop += 330;
+
+                      var prevActiveMenu = $('.iai-nav-item.iai-nav-item-active').index();
+                      var activeMenu = 0;
+
+                      // console.log( $(this).scrollTop()+ 330, anchor2.offset().top );
+
+                      if (scrolltop > anchor4.offset().top ) {
+                          activeMenu = 3;
+                      } else if (scrolltop > anchor3.offset().top ) {
+                          activeMenu = 2;
+                      } else if (scrolltop > anchor2.offset().top ) {
+                          activeMenu = 1;
+                      } else if (scrolltop > anchor1.offset().top ) {
+                          activeMenu = 0;
+                      }
+
+                      if (prevActiveMenu !== activeMenu) {
+                          $('.iai-nav-item').removeClass('iai-nav-item-active');
+                          var activeElement = $('.iai-nav-item').get(activeMenu);
+                          $(activeElement).addClass('iai-nav-item-active');
+                      }
+
+                  });
+                }
 
                 $('.iai-nav-item').on('click', function(e){
                     var toScrollTop;