Use Analytics to detect links to external pages.

analytics-external-link.js

$(document).ready(function () {

    $(".meet").mousedown(function () {
    
        ga('send', 'event', {
            eventCategory: 'Meet HTC 10 Button',
            eventAction: 'click',
            eventLabel: event.target.href,
            transport: 'beacon'
      });
    });

    $(".buy-now").mousedown(function () {

    ga('send', 'event', {
            eventCategory: 'HTC 10 Buy Now Button',
            eventAction: 'click',
            eventLabel: event.target.href,
            transport: 'beacon'
      });
    });

});