-- Global site tag gtag js Google Analytics -- script async src https

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-17327728-2"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

  gtag('config', 'UA-17327728-2');
</script>

<script>
	$(document).ready(function () {
		if (sessionStorage.getItem("startTime") == null){
			var startTime = new Date().getTime();
			sessionStorage.setItem("startTime", startTime);
		}
		if ($('#gag-push').length > 0) {
			var endTime = new Date().getTime();
			var startedTime = sessionStorage.getItem('startTime');
			var timeSpent = (endTime - startedTime);
			timeSpent = timeSpent.toFixed();
			ga('create', 'UA-17327728-2', 'auto');
			ga('send', 'timing', 'Время до конверсии', 'Покупка товара', timeSpent);
			console.log('sended');
		}
	});
</script>