https://www.frequentis.com/modules/contrib/magnific_popup/js/magnific-popup.js?v=1

1(function ($, Drupal, drupalSettings) {
2
3  "use strict";
4
5  Drupal.behaviors.magnific_popup = {
6    attach: function (context, settings) {
7      // Gallery.
8      $(once('mfp-processed', '.mfp-all-items, .mfp-first-item, .mfp-random-item', context)).each( function() {
9        const verticalFit = $(this).attr('data-vertical-fit') === undefined || $(this).attr('data-vertical-fit') === 'true' ? true : false;
10        $(this).magnificPopup({
11          delegate: 'a',
12          type: 'image',
13          gallery: {
14            enabled: true
15          },
16          image: {
17            verticalFit: verticalFit,
18            titleSrc: function (item) {
19              return item.img.attr('alt') || '';
20            }
21          }
22        });
23      });
24
25      // Separate items.
26      $(once('mfp-processed', '.mfp-separate-items', context)).each(function () {
27        const verticalFit = $(this).attr('data-vertical-fit') === undefined || $(this).attr('data-vertical-fit') === 'true' ? true : false;
28        $(this).magnificPopup({
29          delegate: 'a',
30          type: 'image',
31          image: {
32            verticalFit: verticalFit,
33            titleSrc: function (item) {
34              return item.img.attr('alt') || '';
35            }
36          }
37        });
38      });
39    }
40  };
41
42})(jQuery, Drupal, drupalSettings);