scroll position

1function getYPosition(){
2  var top  = window.pageYOffset || document.documentElement.scrollTop
3  return top;
4}

1$(window).on('scroll', function() {
2    console.log( $(this).scrollTop() );
3});

1$(window).scroll(function() {
2	var $height = $(window).scrollTop();
3  if($height > 50) {
4		//do something
5	} else {
6		//do something
7	}
8});

1      
2      abstract class ViewportScroller {
3  abstract setOffset(offset: [number, number] | (() => [number, number])): void
4  abstract getScrollPosition(): [number, number]
5  abstract scrollToPosition(position: [number, number]): void
6  abstract scrollToAnchor(anchor: string): void
7  abstract setHistoryScrollRestoration(scrollRestoration: "auto" | "manual"): void
8}
9    

1import { HostListener } from '@angular/core';
2
3@ViewChild('curtain') divCurtain: ElementRef;
4
5export class ComponentX {
6    @HostListener('window:scroll', ['$event']) onScrollEvent($event) {
7        console.log(window.pageYOffset);
8        this.divCurtain.nativeElement.style.top = window.pageYOffset.toString().concat('px');
9    }
10
11    ngOnInit(): void { }
12}
13