One of my favorite parts of CSS is it can change styling based on specific user preferences. For example, you can use prefers-color-scheme if a user tells its browser it wants to use dark mode. It's an easy way to make things easier for users on a case-by-case basis.

But one article I found shows I still don't understand the full extent of CSS's powers here. The prefers-reduced-motion lets coders hide animations from users with sensitive eyes, vestibular disorders, or just find them irritating. As it turns out, the responsive images picture tag can use it too!

<source media="(min-width: 800px)" srcset="espeon-herd.jpg">
<source media="(min-width: 500px)" srcset="espeon-large.jpg">
<img src="espeon.jpg">

You can also use media to show users an animated GIF if they haven't specified they want reduced motion. It also falls back to the static image for browsers that don't support the media query.

<source media="(prefers-reduced-motion: no-preference)" srcset="espeon-glowing.gif">
<img src="espeon-smile.jpg">

You can see a quick example of this below. You'll see a different image depending on your device's accessibility settings. But each one sends the same basic message while matching what the user wants.

This is another example of how progressive enhancement isn't all that hard. All it takes is a little extra planning and consideration. The payoff is that many more people can stay on your site longer. Everyone wins!