I have this peace of JS code:

// url = some url that return 200 or 403/404 status code

function f1() {

  let script = document.createElement('script')

  script.src = url; 
  
  script.onload = () => console.log("onload triggered");
  script.onerror = () => console.log("onerror triggered");
  document.head.appendChild(script)
}

f1();

I need an alternative way to trigger load and error events with no .onload and .onerror strings. Any ideas?