Background Position X and Y
Every now and then I look at using background-position-x and background-position-y but can never seem to find a definitive and up-to-date resource. To save myself the trouble in the future, I’m documenting it here.

Every now and then I look at using background-position-x and background-position-y but can never seem to find a definitive and up-to-date resource. To save myself the trouble in the future, I’m documenting it here.
