Firing in Optimizely page view goal in AngularJS

gistfile1.js

/*
  Send an Optimizely page view tracking call in AngularJS
*/

window.scope = window.angular.element(document).find('body').scope();
window.scope.$on('$locationChangeSuccess', function(event, next, current) {
  window['optimizely'] = window['optimizely'] || [];
  window.optimizely.push(['trackEvent', next]);
});