https://www.sellwell-hk.com/js/count.js

1(function($){
2    $.fn.numberRock=function(options){
3        var defaults={
4            speed:24,
5            count:100
6        };
7        var opts=$.extend({}, defaults, options);
8
9        var div_by = 100,
10        count=opts["count"],
11        speed = Math.floor(count / div_by),
12        sum=0,
13        $display = this,
14        run_count = 1,
15        int_speed = opts["speed"];
16        var int = setInterval(function () {
17            if (run_count <= div_by&&speed!=0) {
18                $display.text(sum=speed * run_count);
19                run_count++;
20            } else if (sum < count) {
21                $display.text(++sum);
22            } else {
23                clearInterval(int);
24            }
25        }, int_speed);
26    }
27
28})(jQuery);
29