Did you see that neat technique for using the
After we shared that in our newsletter, we got an interesting reply from Michael Gale:
What about folks who love their animated GIFs, but just didn’t want the UI to be zooming all over the place? Are they now forced to make a choice between content and UI?
I thought that was a pretty interesting question.
Also, whenever I see these days, my brain is triggered into WELL WHAT ABOUT MP4?! territory, as I’ve been properly convinced that videos are better-in-all-ways on the web than GIFs. Turns out, some browsers support videos right within the
element and, believe it or not, you can write fallbacks for that, with — drumroll, please — for the
Let’s take a crack at combining all this stuff.
Adding an MP4 source
The easy one is adding an additional
- A fallback non-animated graphic when prefers-reduced-motion is reduce.
- An animated GIF as the default.
- An MP4 video to replace the GIF, if the fallback is supported.
For example:
<picture> <source srcset="static.png" media="(prefers-reduced-motion: reduce)"></source> <source srcset="animated.mp4" type="video/mp4"> <img srcset="animated.gif" alt="animated image"> </source></picture>
Under default conditions in Chrome, only the GIF is downloaded and shown:
Under default conditions in Safari, only the MP4 is downloaded and shown:
If you’ve activated prefers-reduced-motion: reduce in either Chrome or Safari (on my Mac, I go to System Preferences → Accessibility → Display → Reduce Motion), both browsers only download the static PNG file.
I tested Firefox and it doesn’t seem to work, instead continuing to download the GIF version. Firefox seems to support prefers-reduced-motion, but perhaps it’s just not supported on
Wouldn’t it be kinda cool to provide a single animated source and have a tool generate the others from it? I bet you could wire that up with something like Cloudinary.
Adding a toggle to show the animated version
Like Michael Gale mentioned, it seems a pity that you’re entirely locked out from seeing the animated version just because you’ve flipped on a reduced motion toggle.
It should be easy enough to have a
I’m fairly sure there is no practical way to do this declaratively in HTML. We also can’t put this button within the
<div> <picture> <!-- sources --> </picture> <button>Animate</button> </div>
We can position the button on top of the image somewhere. This is just an arbitrary choice — you could put it wherever you want, or even have the entire image be tappable as long as you think you could explain that to users. Remember to only show the button when the same media query matches:
.picture-wrap .animate-button { display: none; } @media (prefers-reduced-motion: reduce) { .picture-wrap .animate-button { display: block; } }
When the button is clicked (or tapped), we need to remove the media query to start the animation by downloading an animated source.
let button = document.querySelector(".animate-button"); button.addEventListener("click", () => { const parent = button.closest(".picture-wrap"); const picture = parent.querySelector("picture"); picture.querySelector("source[media]").remove(); });
Here’s that in action:
Maybe this is a good component?
We could automatically include the button, the button styling, and the button functionality with a web component. Hey, why not?
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