JAVASCRIPT

javascript get scroll position

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

checking scroll position with js

let scrollLeft = window.pageXOffset || document.documentElement.scrollLeft,
scrollTop = window.pageYOffset || document.documentElement.scrollTop;Code language: JavaScript (javascript)

checking scroll position with js

document.documentElement.scrollTop = document.body.scrollTop = 1200;
document.documentElement.scrollLeft = document.body.scrollLeft = 600;Code language: JavaScript (javascript)