javascript - How can I tell if an event comes from right Ctrl key?

Question

I have an event listener in Javascript, I can tell whether a key event is Ctrl (e.keyCode == 17), but how can I know this Ctrl comes from the right one or left one?

Answer 1

Just a quick note: I wouldn't base an architecture / design on the availability of the right control key - many laptop keyboards may not have two control keys.