https://railprices.com/js/counter.js

1   $( document ).ready(function() {
2  
3	  $(function() {
4    
5	    var $counters = $('.count'); //contains all elements of count class
6      
7	    var $window = $(window);
8      
9	    $window.on('scroll', function(e) {
10	      $counters.each(function(i, elem) { //loop through each element
11        console.log(i)
12	        if ($(this).hasClass('counted')) // check if already animated
13	          return;
14	        animateCounter($(this));
15	      });
16	    });
17	  });
18    
19	  function animateCounter(elem) {
20	    var winTop = $(window).scrollTop(); // calculate distance from top of window
21	    var winBottom = winTop + $(window).height();
22	    var elemTop = $(elem).offset().top; // element distance from top of page
23	    var elemBottom = elemTop + $(elem).height();
24      
25	    if ((elemBottom <= winBottom) && (elemTop >= winTop)) {
26	      $(elem).each(function() {
27	        var $this = $(this);
28	        jQuery({
29	          Counter: 0
30	        }).animate({
31	          Counter: $this.attr('data-count')
32	        }, {
33	          duration: 4000,
34              easing: 'swing',
35	          step: function() {
36	            $this.text(Math.ceil(this.Counter));
37	          }
38	        });
39	        $this.removeClass('count').addClass('counted');
40	      });
41	    }
42	  }
43
44   });