backbone.analytics/backbone.analytics.js

A drop-in plugin that integrates Google's `trackEvent` directly into Backbone's `navigate` function.

(function(factory) {

  'use strict';

  if (typeof define === 'function' && define.amd) {
    define(['backbone'], factory);
  } else if (typeof exports === 'object') {
    module.exports = factory(require('backbone'));
  } else {
    factory(window.Backbone);
  }
})(function(Backbone) {

  'use strict';

  var loadUrl = Backbone.History.prototype.loadUrl;

  Backbone.History.prototype.loadUrl = function(fragmentOverride) {
    var matched = loadUrl.apply(this, arguments),
        gaFragment = this.fragment;

    if (!this.options.silent) {
      this.options.silent = true;
      return matched;
    }
    
    if (!/^\//.test(gaFragment)) {
      gaFragment = '/' + gaFragment;
    }

    // legacy version
    if (typeof window._gaq !== "undefined") {
      window._gaq.push(['_trackPageview', gaFragment]);
    }

    // Analytics.js
    var ga;
    if (window.GoogleAnalyticsObject && window.GoogleAnalyticsObject !== 'ga') {
      ga = window.GoogleAnalyticsObject;
    } else {
      ga = window.ga;
    }

    if (typeof ga !== 'undefined') {
      ga('set', 'page', gaFragment);
      ga('send', 'pageview');
    }
    return matched;
  };

});