               e.preventDefault();
                  const activeOpt = this.getAllOptions()[this.activeIndex];
                  if (
                    activeOpt &&
                    activeOpt.getAttribute("aria-disabled") !== "true"
                  ) {
                    this.selectOption(activeOpt);
                  }
                }
                break;
              case "Backspace":
                e.preventDefault();
                this.searchString = this.searchString.slice(0, -1);
     