Failed attempt to use a mutationObserver to replace a Drupal destination parameter on a use-ajax trigger link. The Drupal.ajax event listener registers it before the fix!

custom.js

/**
 * @file
 * Global utilities.
 */

var michiganDesignInit = false; // Global scoped to track attachment just once.
(function($, Drupal) {
  Drupal.behaviors.michigan_design = {
    attach: function(context, settings) {
      if (context === document && !michiganDesignInit) {
        michiganDesignInit = true;

        // Switch incorrect /views/ajax destination for current page path.
        var $bootstrapAccordion = document.querySelector('.block-bootstrap-collapse');
        if ($bootstrapAccordion && "MutationObserver" in window) {
          var mutationObserver = new MutationObserver(function (mutations) {
            mutations.forEach(function (mutation) {
              if (mutation.type === 'childList') {
                var $destinations = mutation.target.querySelectorAll('a[href*="destination=/views/ajax"]');
                if ($destinations.length) {
                  Array.prototype.forEach.call($destinations, (destination) => {
                    var href = destination.getAttribute('href');
                    var newHref = href.replace('/views/ajax', window.location.pathname);
                    destination.setAttribute('href', newHref);
                  });
                }
              }
            });
          });

          mutationObserver.observe($bootstrapAccordion, {
            attributes: true,
            characterData: true,
            childList: true,
            subtree: true,
            attributeOldValue: false,
            characterDataOldValue: false,
          });
        }
      }
    }
  };
})(jQuery, Drupal);