Element#positionedOffset() → Array

Returns element's offset relative to its closest positioned ancestor (the element that would be returned by Element.getOffsetParent).

Returns an array in the form of [leftValue, topValue]. Also accessible as properties: { left: leftValue, top: topValue }.

This method can be called either as an instance method or as a generic method. If calling as a generic, pass the instance in as the first argument.