https://viveikjha.github.io/tilphysics/assets/vendor/startbootstrap-clean-blog/js/scripts.js

1/*!
2* Start Bootstrap - Clean Blog v5.1.0 (https://startbootstrap.com/theme/clean-blog)
3* Copyright 2013-2021 Start Bootstrap
4* Licensed under MIT (https://github.com/StartBootstrap/startbootstrap-clean-blog/blob/master/LICENSE)
5*/
6(function ($) {
7    "use strict"; // Start of use strict
8
9    // Floating label headings for the contact form
10    $("body").on("input propertychange", ".floating-label-form-group", function (e) {
11        $(this).toggleClass("floating-label-form-group-with-value", !!$(e.target).val());
12    }).on("focus", ".floating-label-form-group", function () {
13        $(this).addClass("floating-label-form-group-with-focus");
14    }).on("blur", ".floating-label-form-group", function () {
15        $(this).removeClass("floating-label-form-group-with-focus");
16    });
17
18    // Show the navbar when the page is scrolled up
19    var MQL = 992;
20
21    //primary navigation slide-in effect
22    if ($(window).width() > MQL) {
23        var headerHeight = $('#mainNav').height();
24        $(window).on('scroll', {
25                previousTop: 0
26            },
27            function () {
28                var currentTop = $(window).scrollTop();
29                //check if user is scrolling up
30                if (currentTop < this.previousTop) {
31                    //if scrolling up...
32                    if (currentTop > 0 && $('#mainNav').hasClass('is-fixed')) {
33                        $('#mainNav').addClass('is-visible');
34                    } else {
35                        $('#mainNav').removeClass('is-visible is-fixed');
36                    }
37                } else if (currentTop > this.previousTop) {
38                    //if scrolling down...
39                    $('#mainNav').removeClass('is-visible');
40                    if (currentTop > headerHeight && !$('#mainNav').hasClass('is-fixed')) $('#mainNav').addClass('is-fixed');
41                }
42                this.previousTop = currentTop;
43            });
44    }
45
46})(jQuery); // End of use strict