A have sent event form javascript using window.tracker.track but I do not see it in Tracardi. This is the code:

window.tracker.track("purchase-order", {
  "product": "Sun glasses - Badoo " + index,
  "price": 13.45
}, {
  async: false
});

The issue seems to be that the event "purchase-order" is not being sent from the widget to Tracardi. This could be due to the fact that the event are waiting for the page to load before firing. To send event on demand additional option must be added. To resolve this issue, you can add the fire: true option to the window.tracker.track call. This will instruct the event to fire immediately, regardless of whether the page has loaded or not.

Here's the corrected code:

window.tracker.track("purchase-order", {
  "product": "Sun glasses - Badoo " + index,
  "price": 13.45
}, {
  async: false,
  fire: true
});

This should ensure that the "purchase-order" event is sent to Tracardi immediately when the purchase button is clicked.