https://www.lnh.edu.pk/bluetheme/js/lnh-customjs.js

1// JavaScript source code
2// Show an element
3var show = function (elem) {
4
5    // Get the natural height of the element
6    var getHeight = function () {
7        elem.style.display = 'block'; // Make it visible
8        var height = elem.scrollHeight + 'px'; // Get it's height
9        elem.style.display = ''; //  Hide it again
10        return height;
11    };
12
13    var height = getHeight(); // Get the natural height
14    elem.classList.add('is-visible'); // Make the element visible
15    elem.style.height = height; // Update the max-height
16
17    // Once the transition is complete, remove the inline max-height so the content can scale responsively
18    window.setTimeout(function () {
19        elem.style.height = '';
20    }, 350);
21
22};
23
24// Hide an element
25var hide = function (elem) {
26
27    // Give the element a height to change from
28    elem.style.height = elem.scrollHeight + 'px';
29
30    // Set the height back to 0
31    window.setTimeout(function () {
32        elem.style.height = '0';
33    }, 1);
34
35    // When the transition is complete, hide it
36    window.setTimeout(function () {
37        elem.classList.remove('is-visible');
38    }, 350);
39    //elem.style.height = elem.scrollHeight + 'px';
40};
41
42// Toggle element visibility
43var toggle = function (elem, timing) {
44
45    // If the element is visible, hide it
46    if (elem.classList.contains('is-visible')) {
47        hide(elem);
48        return;
49    }
50
51    // Otherwise, show it
52    show(elem);
53    // Otherwise, hide it
54    //hide(elem);
55
56};
57
58// Listen for click events
59 document.addEventListener('click', function (event) {
60      
61    // Make sure clicked element is our toggle
62    if (!event.target.classList.contains('toggle')) return;
63
64    // Prevent default link behavior
65    event.preventDefault();
66
67    // Get the content
68    var content = document.querySelector(event.target.hash);
69    if (!content) return;
70
71    // Toggle the content
72    toggle(content);
73
74}, false);
75
76