top of window scroll code example

Example 1: javascript get scroll position

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

Example 2: js scrollto

element.scrollTo(x, y);
window.scrollTo(x, y);
element.scrollTo({
  top: 100,
  left: 100,
  behavior: 'smooth'
});