https://www.affingroup.com/themes/demo/js/pds.js

1function pdsAccordion(id, parentClassName) {
2    const firstCategory = document.querySelector('.' + parentClassName + ' #' + id);
3    if (firstCategory) {
4        firstCategory.classList.add('active');
5    }
6
7    const coll = document.querySelectorAll('.' + parentClassName + ' .pds-collapsible');
8    let i, j;
9
10    if (coll) {
11        for (i = 0; i < coll.length; i++) {
12            coll[i].addEventListener('click', function () {
13                const content = this.nextElementSibling;
14                if (content.style.maxHeight) {
15                    content.style.maxHeight = null;
16                } else {
17                    content.style.maxHeight = content.scrollHeight + 'px';
18                }
19
20                for (let i = 0; i < this.childNodes.length; i++) {
21                    const temp = this.childNodes[i];
22
23                    if (temp instanceof Element) {
24                        if (temp.classList.contains("accordion-symbol")) {
25                            if (temp.innerHTML === '+') {
26                                temp.innerHTML = "-";
27                            } else {
28                                temp.innerHTML = "+";
29                            }
30                            break;
31                        }
32                    }
33                }
34            });
35        }
36    }
37
38    const header_btn = document.querySelectorAll('.' + parentClassName + ' .pds-header-btn');
39    const accordion_group = document.querySelectorAll('.' + parentClassName + ' .pds-accordion-group');
40
41    for (let j = 0; j < accordion_group.length; j++) {
42        accordion_group[j].style.display = 'none';
43    }
44
45    for (i = 0; i < header_btn.length; i++) {
46        if (i < 1) {
47            accordion_group[i].style.display = "block";
48        } else {
49            accordion_group[i].style.display = "none";
50        }
51    }
52}
53
54if (document.querySelector('.block-t-n-c')) {
55    pdsAccordion();
56}