JAVASCRIPT

on scroll page jquery

$(window).scroll(function (event) {
  // Do something when the page is scrolled
}

jquery on scroll

Syntax
Trigger the scroll event for the selected elements:
$(selector).scroll()

Attach a function to the scroll event:
$(selector).scroll(function)

jquery on scroll

$( "#target" ).scroll(function() {
  $( "#log" ).append( "<div>Handler for .scroll() called.</div>" );
});