https://www.madeinfilandia.org/wp/wp-content/themes/enfold/js/avia-snippet-sticky-header.js?ver=4.8.5

1(function($)
2{	
3    "use strict";
4    
5    $(document).ready(function()
6    {	
7		// decreases header size when user scrolls down
8        avia_header_size();
9    });
10    
11    
12    function av_change_class($element, change_method, class_name)
13	{	
14		if($element[0].classList)
15		{
16			if(change_method == "add") 
17			{
18				$element[0].classList.add(class_name);
19			}
20			else
21			{
22				$element[0].classList.remove(class_name);
23			}
24		}
25		else
26		{
27			if(change_method == "add") 
28			{
29				$element.addClass(class_name);
30			}
31			else
32			{
33				$element.removeClass(class_name);
34			}
35		}
36	}
37	
38	
39	function avia_header_size()
40	{
41		var win				= $(window),
42			header          = $('.html_header_top.html_header_sticky #header'),
43			unsticktop		= $('.av_header_unstick_top');
44            
45		if( ! header.length && ! unsticktop.length ) 
46		{
47			return;
48		}
49        
50		var logo            = $('#header_main .container .logo img, #header_main .container .logo a'),
51			elements        = $('#header_main .container:not(#header_main_alternate>.container), #header_main .main_menu ul:first-child > li > a:not(.avia_mega_div a, #header_main_alternate a), #header_main #menu-item-shop .cart_dropdown_link'),
52			el_height       = $(elements).first().height(),
53			isMobile        = $.avia_utilities.isMobile,
54			scroll_top		= $('#scroll-top-link'),
55			transparent 	= header.is('.av_header_transparency'),
56			shrinking		= header.is('.av_header_shrinking'),
57			header_meta		= header.find('#header_meta'),
58			topbar_height	= header_meta.length ? header_meta.outerHeight() : 0,
59			set_height      = function()
60            {	
61				var st = win.scrollTop(), 
62					newH = 0, 
63					st_real = st;
64			
65				if( unsticktop ) 
66				{
67					st -= topbar_height;
68				} 
69				
70				if( st < 0 ) 
71				{
72					st = 0;
73				}
74				
75				if( shrinking && ! isMobile )
76				{
77					if( st < el_height/2 )
78					{
79						newH = el_height - st;
80						if( st <= 0 )
81						{
82							newH = el_height;
83						}
84
85						av_change_class( header, 'remove', 'header-scrolled' );
86						//header.removeClass('header-scrolled');
87					}
88					else
89					{
90						newH = el_height/2;
91						//header.addClass('header-scrolled');
92						av_change_class( header, 'add', 'header-scrolled' );
93					}
94
95					if( st - 30 < el_height )
96					{
97						av_change_class( header, 'remove', 'header-scrolled-full' );
98					}
99					else
100					{
101						av_change_class( header, 'add', 'header-scrolled-full' );
102					}
103	                
104	                
105					elements.css({'height': newH + 'px', 'lineHeight': newH + 'px'});
106					logo.css({'maxHeight': newH + 'px'});
107				}
108				
109				if( unsticktop.length )
110				{
111					if( st <= 0 )
112					{
113						if( st_real <= 0 ) 
114						{
115							st_real = 0;
116						}
117
118						unsticktop.css({"margin-top":"-"+st_real+"px"});
119					}
120					else
121					{
122						unsticktop.css({"margin-top":"-"+topbar_height+"px"});
123					}
124				}
125                
126				if( transparent )
127				{	
128					if( st > 50 )
129					{	
130						//header.removeClass('av_header_transparency');
131						av_change_class( header, 'remove', 'av_header_transparency' );
132					}
133					else
134					{
135						//header.addClass('av_header_transparency');
136						av_change_class( header, 'add', 'av_header_transparency' );
137					}
138				}
139
140               
141            };
142
143		if( $('body').is( '.avia_deactivate_menu_resize' ) ) 
144		{
145			shrinking = false;
146		}
147
148		if( ! transparent && ! shrinking && ! unsticktop.length ) 
149		{
150			return;
151		}
152
153		win.on( 'debouncedresize',  function(){ 
154								el_height = $( elements ).attr( 'style',"" ).first().height(); 
155								set_height(); 
156							});
157
158		win.on( 'scroll',  function(){ 
159								window.requestAnimationFrame( set_height ); 
160							});
161
162		set_height();
163    }
164
165
166})(jQuery);
167