Detect scroll to bottom of html element in Angular

@HostListener('window:scroll', ['$event'])
onWindowScroll() {
  // In chrome and some browser scroll is given to body tag
  const pos = (document.documentElement.scrollTop || document.body.scrollTop) + document.documentElement.offsetHeight;
  const max = document.documentElement.scrollHeight;
  const fixedPos = pos + 10;
  console.log(max, fixedPos);
  // pos/max will give you the distance between scroll bottom and and bottom of screen in percentage.
  if (fixedPos >= max) {
    if (!this.isFetching) {
      this.nextHistory().subscribe();
    }
  }
}

References
https://stackoverflow.com/questions/40664766/how-to-detect-scroll-to-bottom-of-html-element

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