angular router event

       router.events.pipe(
            filter(event => event instanceof NavigationEnd)
        ).subscribe((event: any) => {
            const url = event.url.startsWith('/ko') || event.url.startsWith('/en') ? event.url.substring(3) : event.url;
            if (url !== '/cart' && url !== '/order') {
                this.scrollGnb = false;
                window.addEventListener("scroll", this.scrollEvent)
            } else {
                this.scrollGnb = true;
                window.removeEventListener("scroll", this.scrollEvent)
            }
        });

 

 

- 항상 떠있는 nav바에 url이 바뀔때마다 조건을 달기위해서 사용된 방식