trackFn method

@override String trackFn()

Função JS function(ev,p){...} chamada a cada evento rastreado.

Implementation

@override
String trackFn() {
  final std = standardEvents.map((e) => "'$e'").join(',');
  return "function(ev,p){if(!window.fbq)return;var s=[$std];fbq(s.indexOf(ev)>=0?'track':'trackCustom',ev,p||{});}";
}