Method toggle

aspnet-samples/AspNetForm/Scripts/bootstrap.js:4213–4218

(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);