=============\n   */\n\n  class Dropdown {\n    constructor(element, config) {\n      this._config  = config\n      this._element = element\n    }\n\n    // Public\n\n    toggleSubmenu() {\n      this._element.siblings().show().toggleClass(\"show\");\n\n      if (! this._element.next().hasClass('show')) {\n        this._element.parents('.dropdown-menu').first().find('.show').removeClass(\"show\").hide();\n      }\n\n      this._element.parents('li.nav-item.dropdown.show').on('hidden.bs.dropdown',...