https://pluscareer.net/layouts/pluscareer/js/vert-navi.js

1jQuery(document).ready(function($){
2	var contentSections = $('.cd-section'),
3		navigationItems = $('#cd-vertical-nav a');
4
5	updateNavigation();
6	$(window).on('scroll', function(){
7		updateNavigation();
8	});
9
10	//smooth scroll to the section
11	navigationItems.on('click', function(event){
12        event.preventDefault();
13        smoothScroll($(this.hash));
14    });
15    //smooth scroll to second section
16    $('.cd-scroll-down').on('click', function(event){
17        event.preventDefault();
18        smoothScroll($(this.hash));
19    });
20
21    //open-close navigation on touch devices
22    $('.touch .cd-nav-trigger').on('click', function(){
23    	$('.touch #cd-vertical-nav').toggleClass('open');
24  
25    });
26    //close navigation on touch devices when selectin an elemnt from the list
27    $('.touch #cd-vertical-nav a').on('click', function(){
28    	$('.touch #cd-vertical-nav').removeClass('open');
29    });
30
31	function updateNavigation() {
32		contentSections.each(function(){
33			$this = $(this);
34			var activeSection = $('#cd-vertical-nav a[href="#'+$this.attr('id')+'"]').data('number') - 1;
35			if ( ( $this.offset().top - $(window).height()/2 < $(window).scrollTop() ) && ( $this.offset().top + $this.height() - $(window).height()/2 > $(window).scrollTop() ) ) {
36				navigationItems.eq(activeSection).addClass('is-selected');
37			}else {
38				navigationItems.eq(activeSection).removeClass('is-selected');
39			}
40		});
41	}
42
43	function smoothScroll(target) {
44        $('body,html').animate(
45        	{'scrollTop':target.offset().top},
46        	600
47        );
48	}
49});