Dec 8, 2014
You should use resolution property to specify high resolution display. Because
device-pixel-ratio is non-standard property. But iOS safari dose not support
Actually, You need to use both property.
image-set in background-image
Attension of image-set solution
You can use background-image#image-set to specify high resolution display. It is more simply than media query.
All of mobile browser including Android browser can use it.