on https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
it describes how addEventListener works
it mentions "The method addEventListener() works by adding a function, or an object that implements EventListener, to the list of event listeners for the specified event type on the EventTarget on which it’s called. If the function or object, is already in the list of event listeners for this target, they are not added a second time.
They do not need to be removed manually with removeEventListener()."
it’s this last line that bugs me - should this be changed to "…for this target, they are not added a second time and they do not need to be removed "
because otherwise it seems to be out of place