Evento para contar links externos a través de eventos

count-outside-links-analytics.js

(function () {
  function handleOutboundLinkClicks (event) {
    event.preventDafault();
    ga('send', 'event', {
      eventCategory: 'Outbound Link',
      eventAction: 'click',
      eventLabel: event.target.href,
      hitCallback: function () {
        window.location.href = event.target.href;
      }
    });
  }
  var outlinks = document.querySelectorAll("[data-outlink]");
  for (var i = outlinks.length - 1; i >= 0; i--) {
    outlinks[i].addEventListener("click", handleOutboundLinkClicks);
  }
})();