Toggling between two alternative settings is often useful.
If the setting that you want to toggle has a boolean (ON ⇄ OFF) (true ⇄ false) value, then the JS ! operator (not or logical negation) is a very useful instrument, giving us:
!true -> false
and
!false -> true
For example, we can toggle link mode by writing:
editor.linkModeEnabled = !editor.linkModeEnabled
or toggle focus mode by writing:
editor.focusModeEnabled = !editor.focusModeEnabled
and toggle the flagged status of the active draft by writing:
draft.isFlagged = !draft.isFlagged