init.js

import Barba from 'barba.js/dist/barba';

export default function (routes) {
  Barba.Pjax.Dom.wrapperId = 'barba-wrapper';
  Barba.Pjax.Dom.containerClass = 'barba-container';

  // Fire Barba.js
  Barba.Pjax.start();
  Barba.Prefetch.init();

  Barba.Dispatcher.on('transitionCompleted', function() {
     // Set new classes from #af-classes to body
     $('body').attr('class', $('main').attr('class'));

     // Fire routes again after new content loaded
     routes.loadEvents();
  });
}