https://tickets.nbg.kiev.ua/js/module.promocode.js

1var promocode = (function() {
2
3    var init = function () {
4        let promoButton = document.getElementById('promosend');
5        if(!promoButton) {
6            return false;
7        }
8
9        document.getElementById('promosend').addEventListener('click', function() {
10            var promocode = document.getElementById('promocode').value;
11            var url = document.getElementById('promocode').getAttribute('data-url');
12            var error = document.getElementById('promo_error');
13            var success  = document.getElementById('promo_success');
14            var hiddenField = document.getElementById('promo_id');
15
16            success.innerHTML = error.innerHTML = '';
17            success.style.display = error.style.display = 'none';
18            var xhr = new XMLHttpRequest();
19            xhr.open('POST', url);
20
21            xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
22            xhr.setRequestHeader('X-CSRF-Token', yii.getCsrfToken());
23
24            xhr.onload = function() {
25                var response = JSON.parse(xhr.responseText);
26                if (xhr.status === 200) {
27                    window.dispatchEvent(new CustomEvent('indirim_yaz',{detail:{percent : parseInt(response.percent)}}));
28                    document.getElementById('promocode').value = '';
29
30                    success.innerHTML = response.message;
31                    success.style.display = 'block'
32
33                    hiddenField.value = response.id_promo;
34                }
35                if (xhr.status === 418) {
36                    error.innerHTML = response.error;
37                    error.style.display = 'block';
38                }
39            };
40            xhr.send('promocode=' + encodeURIComponent(promocode)); // Send the request with the promocode input value as the request body
41        });
42
43        return true
44    };
45
46    return {
47        init: init
48    }
49}());