Javascript, track iframes redirecting top window

Question

Since there is no way to prevent an iframe from redirecting the top frame besides sandboxing which prevents other features required for viewability tracking I would like to trac

Answer 1

You can show a dialog box before redirecting to another domain/application and then the user can decide - to stay or leave the current application. You can also track the current target (i.e. iframe in your case).

window.onbeforeunload = function (e) {
  console.log(e.currentTarget.location.href);
  return 'Stop redirection. Show dialog box.';
};