Event of type `"error"` incorrectly typed as ErrorEvent even when it's not actually ErrorEvent in practice

Bug Report

🔎 Search Terms

ErrorEvent error capture

🕗 Version & Regression Information

This is the behavior in every version I tried, and I reviewed the FAQ for entries about events

⏯ Playground Link

Playground link with relevant code

💻 Code

const scriptElement = document.createElement('script');
scriptElement.addEventListener('error', event => {
  console.log(`1. script element error event constructor: ${event.constructor.name}`);
});
scriptElement.src = 'https://example.com/nonExistentScript.js';

const linkElement = document.createElement('link');
linkElement.addEventListener('error', event => {
  console.log(`2. link element error event constructor: ${event.constructor.name}`);
});
linkElement.rel = 'stylesheet';
linkElement.href = 'https://example.com/nonExistentStylesheet.css';

window.addEventListener('error', event => {
  console.log(`3. window error event constructor: ${event.constructor.name}`);
});

window.addEventListener('error', event => {
  console.log(`4. window error (with capture) event constructor: ${event.constructor.name}`);
}, {
  capture: true
});

document.head.appendChild(scriptElement);

document.head.appendChild(linkElement);

throw new Error('Uncaught Error');

🙁 Actual behavior

For the above code, the TypeScript compiler types each event callback parameter as ErrorEvent, even though that's not always the type at runtime

Note that the linked playground doesn't show the log messages for the uncaught Error case; here's the full log output:

3. window error event constructor: ErrorEvent
4. window error (with capture) event constructor: ErrorEvent
4. window error (with capture) event constructor: Event
2. link element error event constructor: Event
4. window error (with capture) event constructor: Event
1. script element error event constructor: Event

🙂 Expected behavior

I don't know enough about the DOM "error" event to know what a complete solution would be, but ideally, in the code above, I guess the type for event would be:

1. Event
2. Event
3. ErrorEvent (assuming window non-capture event dispatches of type "error" are always ErrorEvent, which I don't know)
4. ErrorEvent | Event

Beginne mit dem verlinkten TypeScript Playground und den beteiligten DOM-"error"-Event-Listener-Typisierungen in den Beispielen. Vergleiche die inferierten Callback-Parametertypen mit den zur Laufzeit protokollierten Konstruktoren für Script-, Link- und Window-Events und stelle anschließend sicher, dass die resultierenden Typen diese Fälle korrekt darstellen.