keyCode === KEY_CODES.SPACE ||
          keyCode === KEY_CODES.DELETE
        );
      },

      /**
       * Helper function to apply CSS styles to list items
       */
      applyListItemStyle = function ($item, isSelected) {
        if (isSelected) {
          if (typeof listSelectedCssInfo === "undefined") {
            $item.css("background-color", "#e5e5e5");
          } else {