https://www.mango-office.ru/local/templates/mango_ru/js/custom/plugins/scroll.to.js?17906266302332

1/**
2 * Created by emas on 06.05.2016.
3 */
4(function ($) {
5    $.fn.isWindowScrolledToElement = function (offset) {
6        offset = parseInt(offset) || 0;
7        return $(document).scrollTop() + $(window).height() > $(this).offset().top + offset;
8    };
9
10    $.fn.onScrollToElement = function (callbackOnScroll,
11                                       callbackIfAlreadyScrolled,
12                                       execTriggerEvenIfAlreadyScrolled,
13                                       scrollOutCallback,
14                                       options
15    ) {
16        var t = this;
17
18        if (!t.size()) return;
19        if (!options) options = {};
20
21        $(document).bind('scroll.scrolltoelements', function () {
22            if ($(t).isWindowScrolledToElement(options.offset)) {
23                if (!$(t).data('scrolled-to-element')) {
24                    $(t).data('scrolled-to-element', true);
25                    if (typeof callbackOnScroll == 'function') callbackOnScroll.call(t);
26                }
27            } else {
28                if ($(t).data('scrolled-to-element')) {
29                    if (typeof scrollOutCallback == 'function') {
30                        $(t).data('scrolled-to-element', false);
31                        scrollOutCallback.call(t);
32                    }
33                }
34            }
35        });
36
37        if (!$(t).isWindowScrolledToElement(options.offset)) {
38
39        } else {
40            if (execTriggerEvenIfAlreadyScrolled) {
41                if (typeof callbackOnScroll == 'function') {
42                    $(t).data('scrolled-to-element', true);
43                    callbackOnScroll.call(t);
44                }
45            }
46
47            if (typeof callbackIfAlreadyScrolled == 'function') callbackIfAlreadyScrolled.call(t);
48        }
49    };
50
51    $.fn.scrollToThis = function() {
52        if (this.offset())
53            $('html, body').scrollTop(this.offset().top - ($(window).height() / 3));
54        return this;
55    };
56
57    window.scrollToTarget = function (target) {
58
59        var targetTopPos,
60            topPanel = $('.sticky-panel'),
61            topPanelHeight = topPanel.height() || 0;
62
63        if(target.length > 0){
64            targetTopPos = target.offset().top - topPanelHeight;
65            $('html, body').animate({scrollTop: targetTopPos}, 300);
66        }
67    };
68
69})(jQuery);