Our CSS is now in .spriter files, and using a sprite is as easy as a normal CSS background image:

span.icon {
  -spriter-background: 'icon.png';
}

There’s a Rack middleware that converts .spriter files to CSS and generates the sprite images on request which we use in development, and a few simple methods to create static assets that we use when deploying to production.

If you’re interested you can read more on the Reevoo blog and get the code from GitHub.