scrollbar position top css code example

Example 1: css scrollbar position to bottom

document.getElementsByClassName('className')[0].scrollTop = document.getElementsByClassName('className')[0].scrollHeight;

Example 2: scrollbar position

$(window).scroll(function() {
	var $height = $(window).scrollTop();
  if($height > 50) {
		//do something
	} else {
		//do something
	}
});