https://tasmania.com/wp-content/themes/tasmania/js/scrollto.js?v=1.0.0

1(function($) {
2
3    var $heroNav = $('#masthead');
4    var heroNavEnd = function() {
5        if($heroNav.length==0) return 0;
6        return parseInt($heroNav.css('top').match(/([\d]+)/)[0]) + $heroNav.outerHeight() + 20;
7    };
8
9    $(document.body).on('click', 'a[href^="#"]:not(.sr-only):not(.screen-reader-text):not(.screen-reader-link):not(.no-scroll)', handleAnchor);
10
11    function handleAnchor(e) {
12        if (!(this.hash.length>0 && this.hash !== '#' && this.hasAttribute('data-vc-tabs')===false && this.hasAttribute('data-vs-accordion')===false)) return;
13        var $el = $(this.hash);
14
15        if($el.length==0) return;
16
17        //console.log('scroll');
18
19        var startHeroNavEnd = heroNavEnd();
20        var top = $el.offset().top - (parseInt($el.css('marginTop')) + startHeroNavEnd);
21        e.preventDefault();
22        $("html, body").animate({
23            scrollTop: top,
24        }, {
25            step: function(now, tween) {
26                //console.log(now);
27                //console.log(tween);
28                if(heroNavEnd() !== startHeroNavEnd) {
29                    startHeroNavEnd = heroNavEnd();
30                    $(this).stop().animate({scrollTop: $el.offset().top - (parseInt($el.css('marginTop')) + startHeroNavEnd)});
31                }
32            },
33            progress: function(animation, progress, remaining) {
34                //console.log(progress);
35            }
36        }, 1000);
37        return false;
38    }
39})(jQuery);