Using the pipe operator in RXJS to transform an Event into a KeyboardEvent

I'm encountering an error when trying to add a keydown event and convert the parameter type from Event to KeyboardEvent as shown below.

fromEvent(document, "keydown")
  .pipe<KeyboardEvent, KeyboardEvent>(
    filter((event) => event.code === "F5"),
    tap((event) => event.preventDefault())
  )
  .subscribe((ev) => {
    console.log(ev);
  });

However, I am getting this error message:

error TS2345: Argument of type 'MonoTypeOperatorFunction<Event>' is not assignable to parameter of type 'OperatorFunction<Event, KeyboardEvent>'.
  Type 'Observable<Event>' is not assignable to type 'Observable<KeyboardEvent>'.
    Type 'Event' is missing the following properties from type 'KeyboardEvent': altKey, charCode, code, ctrlKey, and 17 more.

Has anyone come across this issue before?

Answer №1

fromEvent can be used with various types.

fromEvent<MouseEvent>(document, "click") // ...

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