CallbackEvents

window.usabilla_live('setEventCallback', function(category, action, label, value, userData){
  function flat(source, target) {
    Object.keys(source).forEach(function (k) {
      if (source[k]!== null && typeof source[k] === 'object') {
        flat(source[k], target);
        return;
      }
      target[k] = source[k];
    });
  }
  if(action === "Feedback:Success" || (action === "Campaign:Page Switch" && userData.end)) {
    var userDataFlat = {};
    flat(userData, userDataFlat);
    for(var i in userDataFlat) {
      console.log(i +" => " + userDataFlat[i]);
    }
  }
});