code: function onNavBarToggle() {
          $(Selector.NAVBAR_SIDEBAR).toggleClass(ClassName.OPEN);
          if (($(Selector.NAVBAR_SIDEBAR).hasClass(ClassName.NAVBAR_SIDEBAR)) && $(Selector.NAVBAR_SIDEBAR).hasClass(ClassName.OPEN)) {
              $(Selector.OVERLAY).addClass(ClassName.OVERLAY_ACTIVE);
              $(Selector.BODY).addClass(ClassName.BODY_OPEN);
          } else {
              $(Selector.OVERLAY).removeClass(ClassName.OVERLAY_ACTIVE);
              $(Selector.BODY).addClass(ClassName.BODY_OPEN);
          }
      }
docs: Nave bar in Sidebar