ga-event-tracking-with-optimizely.js

$(function() {

    var experimentID = optimizely.data.state.activeExperiments[0];
    var experimentName = experimentID;

    if (typeof optimizely.data.experiments[experimentID] !== 'undefined') {
        experimentName = optimizely.data.experiments[experimentID].name;
    }

    var variationName = optimizely.data.state.variationNamesMap[experimentID];

    var universalGA;
    var classicGA;
    var standardEventHandler;


    if (typeof ga === "function") {
        universalGA = true;
    }

    if (typeof _gaq !== "undefined" && typeof _gaq.push === "function") {
        classicGA = true;
    }

    if (typeof dataLayer !== "undefined" && typeof dataLayer.push === "function") {
        standardEventHandler = dataLayer.push;
    }



    function sendEvent(action, label) {

        if (standardEventHandler) {

            standardEventHandler({
                'event': 'ABEvent',
                'eventCategory': 'AB-test',
                'eventAction': experimentName,
                'eventLabel': variationName
            });

        } else {

            if (universalGA) {

                ga('send', 'event', 'ABEvent', action, label, 1, {
                    'nonInteraction': true
                });

            }

            if (classicGA) {

                _gaq.push(['_trackEvent', 'ABEvent', action, label, 1, true]);

            }

        }
    }

    sendEvent(experimentName, variationName);

});