Hi Dark Beccio,
You can achieve that with the following code:

window.onload = () => {
  const cardview = document.querySelector('smart-card-view');
  const cards = cardview.querySelectorAll('smart-card');
  
  for(let i = 0; i < cards.length; i++) {
    cards[i].onclick = () => {
      alert("click");
    }
  }
}

In the above code we get all smart-card instances inside the card view and add click event handler to them.
Hope this helps.
Best regards,
Peter Stoev
Smart UI Team
https://www.htmlelements.com/