Start executing jQuery function when I scroll to a specific [duplicate]

Answer 1

Try this:

var eventFired = false,
    objectPositionTop = $('#counter').offset().top;

$(window).on('scroll', function() {

 var currentPosition = $(document).scrollTop();
 if (currentPosition > objectPositionTop && eventFired === false) {
   eventFired = true;
   // your code
 }

});