https://contakts.ai/blog/wp-content/themes/graptor/assets/js/nav-custom.js?ver=7.0.6

1;
2(function ($) {
3    "use strict"
4   /***************************
5    ## Single page scrolling ##
6   ****************************/
7    var graTh = {
8    onePageMenu: function() {
9        function onePageNav($selector) {
10            var $navSelector = $($selector);
11            $navSelector
12            .not('[href="#"]')
13            .not('[href="#0"]')
14            .on('click', function(event) {
15                if ( location.pathname.replace(/^\//, '') === this.pathname.replace(/^\//, '') && location.hostname === this.hostname ) {
16                      var target = $(this.hash);
17                      target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
18
19                      $navSelector.removeClass("active");
20                      if( target.length) {
21                          if($(this)[0].hash.slice(1) === target[0].id) {
22                              $(this).addClass("active");
23                          } else {
24                              $(this).removeClass("active");
25                          }
26                      }
27                     
28                    if (target.length) {
29                        event.preventDefault();
30                        $('html, body').animate({
31                              scrollTop: target.offset().top
32                        }, 1000);
33                    }
34                }
35            });
36
37            $navSelector.each(function(event) {
38                  var target = $(this.hash);
39                  if( target.length) {
40                      if(location.hash.slice(1) === target[0].id) {
41                          $(this).addClass("active");
42                      } else if(!location.hash) {
43                          
44                      } else {
45                          $(this).removeClass("active");
46                      }
47                  }
48            });
49
50            function onScroll(event){
51                var scrollPos = $(document).scrollTop();
52                $navSelector.each(function () {
53                    var currLink = $(this);
54                    if(currLink[0].hash !== "" && $(currLink[0].hash).position() !== undefined) {
55
56                        var $getNavHas = $(currLink).prop('href').split('#')[1],
57                            $getSection = $('#' + $getNavHas); 
58
59                        $getSection.each(function() {
60                            var $topPos = $(this).offset().top,
61                                $topPosRound = Math.round($topPos - 120),
62                                $presentPos = Math.round(scrollPos);
63
64                            if ($topPosRound <= $presentPos && $topPosRound + $(this).height() > $presentPos) {
65                                $(currLink).parent().addClass("active"); 
66                            } else {
67                                $(currLink).parent().removeClass("active");
68                            }
69                        });
70                    } else {
71                        return false;
72                    }
73                });
74            }
75
76            $(document).on("scroll", onScroll);	     
77        }
78        onePageNav('#gnav li a')
79    },
80        initializ: function() {
81            graTh.onePageMenu();
82        }
83    };
84    $(function() {
85		graTh.initializ();
86	})
87    /*====== End onpage scrolling js ========*/
88})(jQuery)