https://www.countrysideveterinaryclinic.org/core/misc/details-aria.js?v=8.9.20

1/**
2* DO NOT EDIT THIS FILE.
3* See the following change record for more information,
4* https://www.drupal.org/node/2815083
5* @preserve
6**/
7
8(function ($, Drupal) {
9  Drupal.behaviors.detailsAria = {
10    attach: function attach() {
11      $('body').once('detailsAria').on('click.detailsAria', 'summary', function (event) {
12        var $summary = $(event.currentTarget);
13        var open = $(event.currentTarget.parentNode).attr('open') === 'open' ? 'false' : 'true';
14
15        $summary.attr({
16          'aria-expanded': open,
17          'aria-pressed': open
18        });
19      });
20    }
21  };
22})(jQuery, Drupal);