https://ppcafe.be/wp-content/themes/mag/js/sticky-header-smart.js?ver=1.0.0

1/*
2 Title: Hide header on scroll down, show on scroll up
3 Author: Marius Craciunoiu
4 URL: https://medium.com/@mariusc23/hide-header-on-scroll-down-show-on-scroll-up-67bbaae9a78c
5
6 Edited by: MNKY (http://themeforest.net/user/MNKY)
7*/
8
9(function($) {
10'use strict;'
11
12	var didScroll,
13		lastScrollTop = 0,
14		delta = 5,
15		wrapper = $('#header-wrapper'),
16		headerHeight = $('#site-header').height(),
17		headerOffset = $('#site-header').offset().top,
18		headerOut = headerHeight + headerOffset;
19	
20	$(window).scroll(function(event){
21		var scrolled = $(this).scrollTop();
22
23		if (scrolled > headerOut) {
24			wrapper.addClass('header-sticky');
25		} else if ( scrolled < headerOffset || scrolled == headerOffset) {
26			wrapper.removeClass('header-sticky');
27			wrapper.css('top', '');
28		} 
29		
30        didScroll = true;
31	});
32	
33	interval(function() {
34		if (didScroll) {
35			hasScrolled();
36			didScroll = false;
37		}
38	}, 250);
39
40	function interval(func, wait, times){
41		var interv = function(w, t){
42			return function(){
43				if(typeof t === "undefined" || t-- > 0){
44					setTimeout(interv, w);
45					try{
46						func.call(null);
47					}
48					catch(e){
49						t = 0;
50						throw e.toString();
51					}
52				}
53			};
54		}(wait, times);
55
56		setTimeout(interv, wait);
57	};
58
59	function hasScrolled() {
60		var st = $(this).scrollTop();
61
62		// Make sure they scroll more than delta
63		if(Math.abs(lastScrollTop - st) <= delta)
64			return;
65		
66		if (st > lastScrollTop && st > headerHeight){
67			// Scroll Down
68			var headerHeightTop = headerHeight + 5;
69			wrapper.css({ 'top' : '-' + headerHeightTop + 'px' });
70		} else {
71			// Scroll Up
72			if(st + $(window).height() < $(document).height() && st > headerHeight) {
73				wrapper.css({ 'top' : '0' });
74			}
75		}
76		
77		lastScrollTop = st;
78	}
79	
80}(jQuery));