Ambiguity of the value of the button property for the click event

[rr-codes]

According to the pointer events spec , a pointer event should have a button value of -1 if "Neither buttons nor touch/pen contact changed since last event".

However, this is inconsistent with the behavior of when the click event was a MouseEvent, where the button property would return 0 (for the primary button).

Additionally, it says

The click event should only be fired for the primary pointer button (i.e., when button value is 0, buttonsvalue is 1)

which further seems to contradict the statement that button should be -1 if it hasn't changed.