This is referring to the integration code itself. It was something like:

  var DOMEvents = ['click', 'submit', 'change'];
  for (var i = 0; i < DOMEvents.length; i++) {
    window.addEventListener(DOMEvents[i], function(e){
      $.post('/collector', {type: e.type, target_id: e.target.id, target_class: e.target.className});
    });
  }