Boilerplate code for Google Analytics integration

experiment.js

/* _optimizely_evaluate=force */

$(window).load(function() {

  var experimentID = TODO_PASTE_IN_HERE; // ex: 9876543210

  try { // wait till window.load so ga exists via segment.io
    var cookieName = 'ga_optimizely_' + experimentID;
    if (!getCookie(cookieName)) {
      setCookie(cookieName, 'sent', 30 * 60); // resend every 30m
      window.ga('send', {
        hitType: 'event',
        eventCategory: 'optimizely',
        eventAction: window.optimizely.data.experiments[experimentID].name,
        eventLabel: window.optimizely.variationNamesMap[experimentID],
        nonInteraction: true
      });
    }
  } catch (e) {}

  /*jshint latedef:false*/

  function setCookie(name, value, optSeconds) {
    'use strict';
    var expires = '';
    if (optSeconds) {
      var date = new Date();
      date.setTime(date.getTime() + (optSeconds * 1000));
      expires = '; expires=' + date.toGMTString();
    }
    document.cookie = name + '=' + value + expires + '; path=/';
  }

  function getCookie(name) {
    'use strict';
    var nameEQ = name + '=';
    var ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i++) {
      var c = ca[i];
      while (c.charAt(0) === ' ') c = c.substring(1, c.length);
      if (c.indexOf(nameEQ) === 0) return c.substring(nameEQ.length, c.length);
    }
    return null;
  }
});

/* _optimizely_evaluate=safe */