Sprites and Retina Displays - CSS-Tricks

CSS sprites are often used for small icons. That is exactly what looks bad on retina displays. Maykel Loomans has a way to deal with that that doesn't make our CSS twice as complicated: 1) Make sprite exactly twice as big 2) Swap out background in media query 3) Shrink background-size in half so coordinates are still correct.

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Sprites and Retina Displays is a post from CSS-Tricks