Scroll,Position
import { HostListener } from '@angular/core';
@ViewChild('curtain') divCurtain: ElementRef;
export class ComponentX {
@HostListener('window:scroll', ['$event']) onScrollEvent($event) {
console.log(window.pageYOffset);
this.divCurtain.nativeElement.style.top = window.pageYOffset.toString().concat('px');
}
ngOnInit(): void { }
}