Should I always removeEventListener?

Question

Say I add a load event to the window like so:

window.addEventListener("load",initialize);

Should I then remove the load event listener from the window after the event is fired? It only fires once, but will it continue to listen after that happens?

It's simple enough to do:

function initialize(event_){
    /* Just by adding this line. */
    window.removeEventListener("load",initialize);
}

But is that overkill or will that actually benefit the performance of my program? I only ask because the "load" event only fires once, so it would make sense if it just resolved itself. I've never heard of a self resolving listener, though... Any thoughts?

Edit: Also, I'm not concerned specifically with the "load" event, just the general scenario where the listener continues to listen for an event that only fires once.

Answer 1

window.addEventListener('load', initialize, {once: true});