Method toggle

aspnet-samples/AspNetForm/Scripts/bootstrap.esm.js:4190–4195

(selector, className)

      return;
    }
    const toggle = (selector, className) => {
      const element = SelectorEngine.findOne(selector, outerElem);
      if (element) {
        element.classList.toggle(className, open);
      }
    };
    toggle(SELECTOR_DROPDOWN_TOGGLE, CLASS_NAME_ACTIVE);
    toggle(SELECTOR_DROPDOWN_MENU, CLASS_NAME_SHOW$1);
    outerElem.setAttribute('aria-expanded', open);