Is it possible to change only the Y value of background position in CSS?

Question

Is it possible to change only Y value of background position in CSS?

background-position-y is not a valid solution.

Answer 1

According to caniuse.com and this SO Question, background-position-y is now standard and supported in all browsers except older versions of Firefox.

background-position-x/-y, background-repeat-x/-y approved for level 4 of backgrounds and borders.