dom input eventListener default behaviour 🤔

[LawEKS]

The input eventListener has its third parameter set to false. But this optional parameter can be an object with a specific key to achieve your desired result.

If you want to preventDefault behaviour for submit button you can do

input.addEventListener("keyup", search, {passive: false})

But considering that you are listening for a "keyup" event.
What is the default behaviour of this?
Do you need to set this optional parameter?

Have a look at MDN for reference
EventTarget.addEventListener()