https://stylespb.com/sites/all/themes/bootstrap/js/misc/_collapse.js?tjx7pa

1(function ($) {
2
3/**
4 * Toggle the visibility of a fieldset using smooth animations.
5 */
6Drupal.toggleFieldset = function (fieldset) {
7  var $toggle = $($(fieldset).find('[data-toggle=collapse]').data('target'));
8  if ($toggle.length) {
9    $toggle.collapse('toggle');
10  }
11};
12
13/**
14 * Scroll a given fieldset into view as much as possible.
15 */
16Drupal.collapseScrollIntoView = function (node) {
17  var h = document.documentElement.clientHeight || document.body.clientHeight || 0;
18  var offset = document.documentElement.scrollTop || document.body.scrollTop || 0;
19  var posY = $(node).offset().top;
20  var fudge = 55;
21  if (posY + node.offsetHeight + fudge > h + offset) {
22    if (node.offsetHeight > h) {
23      window.scrollTo(0, posY);
24    }
25    else {
26      window.scrollTo(0, posY + node.offsetHeight - h + fudge);
27    }
28  }
29};
30
31Drupal.behaviors.collapse = {
32  attach: function (context, settings) {
33    $('fieldset.collapsible', context).once('collapse', function () {
34      var $fieldset = $(this);
35      // Expand fieldset if there are errors inside, or if it contains an
36      // element that is targeted by the URI fragment identifier.
37      var anchor = location.hash && location.hash != '#' ? ', ' + location.hash : '';
38      if ($fieldset.find('.error' + anchor).length) {
39        $fieldset.removeClass('collapsed');
40      }
41
42      var summary = $('<span class="summary"></span>');
43      $fieldset.
44        bind('summaryUpdated', function () {
45          var text = $.trim($fieldset.drupalGetSummary());
46          summary.html(text ? ' (' + text + ')' : '');
47        })
48        .trigger('summaryUpdated');
49
50      // Turn the legend into a clickable link, but retain span.fieldset-legend
51      // for CSS positioning.
52      var $legend = $('> legend .fieldset-legend', this);
53
54      $('<span class="fieldset-legend-prefix element-invisible"></span>')
55        .append($fieldset.hasClass('collapsed') ? Drupal.t('Show') : Drupal.t('Hide'))
56        .prependTo($legend);
57
58      $fieldset.find('[data-toggle=collapse]').on('click', function (e) {
59        e.preventDefault();
60      });
61
62      // Bind Bootstrap events with Drupal core events.
63      $fieldset
64        .append(summary)
65        .on('show.bs.collapse', function () {
66          $fieldset
67            .removeClass('collapsed')
68            .find('> legend span.fieldset-legend-prefix').html(Drupal.t('Hide'));
69        })
70        .on('shown.bs.collapse', function () {
71          $fieldset.trigger({ type: 'collapsed', value: false });
72          Drupal.collapseScrollIntoView($fieldset.get(0));
73        })
74        .on('hide.bs.collapse', function () {
75          $fieldset
76            .addClass('collapsed')
77            .find('> legend span.fieldset-legend-prefix').html(Drupal.t('Show'));
78        })
79        .on('hidden.bs.collapse', function () {
80          $fieldset.trigger({ type: 'collapsed', value: true });
81        });
82    });
83  }
84};
85
86})(jQuery);