Compteur animé jQuery Projet plan PME

utilise la lib https://github.com/mhuggins/jquery-countTo

HTML

<h2>Nous avons déjà aidé<br /> <b class="timer" id="compteur" data-from="1" data-to="3542" data-speed="30000"></b> <br /><b class="apparaitapres">entreprises</b></h2>

CSS

body {
      font-family: Arial;
      padding: 25px;
    }
.apparaitapres {
    color: #fff;
    transition: color 1.5s;
}
.red {
      color: #f00;
    }
h2 {
    text-align: center;
    width: 180px;
    margin: 0 auto;
}

JavaScript

(function ($) {
	$.fn.countTo = function (options) {
		options = options || {};

		return $(this).each(function () {
			// set options for current element
			var settings = $.extend({}, $.fn.countTo.defaults, {
				from:            $(this).data('from'),
				to:              $(this).data('to'),
				speed:           $(this).data('speed'),
				refreshInterval: $(this).data('refresh-interval'),
				decimals:        $(this).data('decimals')
			}, options);

			// how many times to update the value, and how much to increment the value on each update
			var loops = Math.ceil(settings.speed / settings.refreshInterval),
				increment = (settings.to - settings.from) / loops;

			// references & variables that will change with each update
			var self = this,
				$self = $(this),
				loopCount = 0,
				value = settings.from,
				data = $self.data('countTo') || {};

			$self.data('countTo', data);

			// if an existing interval can be found, clear it first
			if (data.interval) {
				clearInterval(data.interval);
			}
			data.interval = setInterval(updateTimer, settings.refreshInterval);

			// initialize the element with the starting value
			render(value);

			function updateTimer() {
				value += increment;
				loopCount++;

				render(value);

				if (typeof(settings.onUpdate) == 'function') {
					settings.onUpdate.call(self, value);
				}

				if (loopCount >= loops) {
					// remove the interval
					$self.removeData('countTo');
					clearInterval(data.interval);
					value = settings.to;

					if (typeof(settings.onComplete) == 'function') {
						settings.onComplete.call(self, value);
					}
				}
			}

			function render(value) {
				var formattedValue = settings.formatter.call(self, value, settings);
				$self.text(formattedValue);
			}
		});
	};

	$.fn.countTo.defaults = {
		from: 0,               // the number the element should start at
		to: 0,                 // the number the element should end at
		speed: 1000,           // how long it should take to count...