I was just talking with Dave about the accessibility of moving images on the web, and he said:
hm… I wonder if you could use
He then sends the following code:<picture> <source srcset="no-motion.jpg" media="(prefers-reduced-motion: reduce)"></source> <img srcset="animated.gif alt="brick wall"/> </picture>
I copied the code, dropped it into a post of mine, created a static image of an animated GIF, and turned on the “reduce motion” preference (System Preferences > Accessibility > Display). And then BOOM. Just worked. In real time!
I added reduced-motion support to DanQ.me earlier this year, but I only bothered to pay attention to the animated parts of the layout and design itself (the “bounce” on the menus and the cutesy motion of the logo, for example) and considered the (few) GIF animations and the like that I’ve added to be out-of-scope. But this approach is really quite simple and elegant, and I’ll bear it in mind if I ever have need of such a thing!