drupal/core/themes/claro/js/vertical-tabs.js

/**
 * @file
 * Overrides vertical tabs theming to enable Claro designs.
 */

(($, Drupal) => {
  /**
   * Theme function for a vertical tab.
   *
   * @param {object} settings
   *   An object with the following keys:
   * @param {string} settings.title
   *   The name of the tab.
   *
   * @return {object}
   *   This function has to return an object with at least these keys:
   *   - item: The root tab jQuery element
   *   - link: The anchor tag that acts as the clickable area of the tab
   *       (jQuery version)
   *   - summary: The jQuery element that contains the tab summary
   */
  Drupal.theme.verticalTab = (settings) => {
    const tab = {};
    tab.title = $('<strong class="vertical-tabs__menu-item-title"></strong>');
    tab.title[0].textContent = settings.title;
    tab.item = $(
      '<li class="vertical-tabs__menu-item" tabindex="-1"></li>',
    ).append(
      (tab.link = $('<a href="#" class="vertical-tabs__menu-link"></a>').append(
        $('<span class="vertical-tabs__menu-link-content"></span>')
          .append(tab.title)
          .append(
            (tab.summary = $(
              '<span class="vertical-tabs__menu-link-summary"></span>',
            )),
          ),
      )),
    );
    return tab;
  };
})(jQuery, Drupal);