I\'m trying to mix background-image and background-size properties in a shorthanded background property. Based on W3C documentation
Just a note for reference: I was trying to do shorthand like so:
background: url('../images/sprite.png') -312px -234px / 355px auto no-repeat;
but iPhone Safari browsers weren't showing the image properly with a fixed position element. I didn't check with a non-fixed, because I'm lazy. I had to switch the css to what's below, being careful to put background-size after the background property. If you do them in reverse, the background reverts the background-size to the original size of the image. So generally I would avoid using the shorthand to set background-size.
background: url('../images/sprite.png') -312px -234px no-repeat;
background-size: 355px auto;