That sounds interesting but it would be a whole lot more interesting if the page was itself an example of said effect!

• sourcecodeplz

  today at 4:57 PM

  I've put together an example here but it doesn't seem to work in Firefox 151.0.2 (64-bit): https://favs.eu.org/parallax/

  Edit: if the body has class="no-sda", it uses a js fallback.

• jonahx

  today at 3:01 PM

  Or even linked to one!

• dsmurrell

  today at 12:19 PM

  I was also looking for examples.

• yashD18

  today at 12:45 PM

  i was waiting for the effect to show up

How does this compare to the classic css-native parallax effect? Before the scroll timeline APIs you'd use the "perspective" css property to create a container where the z plane is n pixels away from the screen, and then position each layer within it at a different z distance using transform: translateZ

That method is GPU accelerated too, so it is performant compared to some js solutions, and has worked well in every browser for around a decade

I like the idea of the scroll-timeline though, just keen to understand what the advantage is for this

• dandep

  today at 12:25 PM

  OP here, thanks for asking. While the `perspective` technique works too, it has the downside of needing a careful combination of scroller elements and properties.

  This approach adds a single class to the image container and that's it. Plus you can control many aspects of the animation such as entry/exit ranges, and make it control other properties like opacity or color, for example.

  I know browser support is still lacking, but it will get there eventually. I'm not using this in production code yet, but I think it's useful to experiment with these new CSS APIs.

• semolino

  today at 3:51 PM

  This method should still support GPU acceleration, as `transform` (or rotate/scale/etc.) is the only property being animated. The benefit of animation-timeline seems to be that it's much easier to set up than a CSS perspective context.

• som

  today at 11:48 AM

  No doubt quite a few folk with the same question. Keen to understand performance tradeoffs.

  Obvious comparison note would be that the "new" method currently enjoys somewhat limited browser support (no Firefox without a flag, and only since Safari 26)

• iainmerrick

  today at 11:20 AM

  I was wondering the same thing. That translateZ is a bit fiddly to get right, so I could believe this is a bit easier to use, maybe? And presumably this could be used for other properties besides position, like colors, opacity or blurs.

A demo https://codepen.io/editor/phelm/pen/019e87f5-dfec-7372-9849-...

• frereubu

  today at 10:53 AM

  There's me scrolling up and down and thinking "hey, it's not working!" But it's behind a flag on Firefox: https://caniuse.com/?search=view-timeline-name

  • frereubu

    today at 1:20 PM

    For people saying it's not working in any browser - do you have some kind of reduced motion preference setting turned on? I can imagine that would have an effect on something like this and it's definitely working in Chrome for me.

    • cj

      today at 1:29 PM

      Yes... there's a media query in the codepen disabling animation for people with reduced motion enabled.

  • werdnapk

    today at 11:26 AM

    It's been behind a flag for ages. Maybe because of performance issues?

    • goodmythical

      today at 3:34 PM

      Enabling (layout.css.scroll-driven-animations.enabled) and refreshing the codepen gives a "we crashed this to prevent a crash from an infinite loop" clicking to allow the infinite loops allowed me to see the animation.

      Fedora 44 Kernel: x86_64 Linux 7.0.10-201.fc44.x86_64 Firefox 151.0.2

  • anssip

    today at 11:10 AM

    Noticed the same thing. In Mac Safari it works without setting any flags.

  • wnevets

    today at 12:11 PM

    Doesnt work on any browser for me

    • today at 1:19 PM

  • WithinReason

    today at 11:28 AM

    tried 4 browsers, didn't work in any of them

    • alpinisme

      today at 11:46 AM

      FWIW it works on iPhone safari

      • deckar01

        today at 3:25 PM

        But it jumps around and flickers pretty bad. Chrome’s own demos in the docs don’t work at all.

        https://developer.chrome.com/docs/css-ui/scroll-driven-anima...

        Edit: Their reference works and has some really nice demos. Must be an iframe problem. https://scroll-driven-animations.style/#demos

      • layer8

        today at 1:05 PM

        Only on iOS 26.

      • abejfehr

        today at 12:45 PM

        I don’t think it did for me. Are you on iOS 26?

• Mashimo

  today at 11:39 AM

  Only worked for me on mobile (vivaldi android) not on vivaldi / chrome / edge on Desktop.

• account42

  today at 11:19 AM

  What an age where we need a pile of javascript as well as a bot check to demo a simple CSS trick.

  • zamadatix

    today at 12:03 PM

    The JS and bot check are for making additional functionality, beyond just showing the example, work easily. I.e. editing and sharing edits from a browser. If all you want is a static example, feel free to make it without these things.

A parallax effect has also long been possible with CSS 3D transforms. Here's a demo,[0][1] from the same person who made that CSS 3D FPS a while ago.[2]

[0]: https://www.keithclark.co.uk/articles/pure-css-parallax-webs...

[1]: blog: https://www.keithclark.co.uk/articles/pure-css-parallax-webs...

[2]: https://www.keithclark.co.uk/labs/css-fps/

You can make some really cool stuff with css scroll animations. I used SVG paths with a scroll animated dash offset to draw an image while scrolling. Zero javascript, it feels so smooth. https://thomaswelter.nl (the background)

• apsurd

  today at 4:43 PM

  oh that's cool!

  Can only see it on chrome though =/. I switched to Safari as the lesser of two data-harvesting evils. Or rather, with an iPhone I've already chosen my overlord. I also switched to Kagi. Trying to deGoogle myself.

• rsyring

  today at 12:13 PM

  Android Firefox: there is no background image.

  • thomasikzelf

    today at 12:26 PM

    firefox android does not support CSS animation-timeline, and firefox desktop needs layout.css.scroll-driven-animations.enabled. This probably should not be used for any critical features.

This [0] seems to be the main meta bug, with [1] being for CSS and [2] for JS, for FF to ship it without the flag. There seems to be slow work towards it, kinda funny that FF was the first browser to have it (flag-gated, according to CIU) and now is the only one without it in stable ;)

[0]: https://bugzilla.mozilla.org/show_bug.cgi?id=1676779

[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1676780

[2]: https://bugzilla.mozilla.org/show_bug.cgi?id=1676781

I played around with this API some time ago. It’s simple and high-performance, but one feature I wish existed is damping. Scroll-driven animations are tied directly to the scroll timeline, so there’s no concept of the parallax object “catching up” to the scroll progress over, say, one second. From what I remember, `animation-timing-function` feels weird when you scroll, so it’s not the right solution. GSAP offers this, but it’s JS-only.

It would be awesome to put an interactive example right in the article.

I was expecting a demo on the linked page itself. Interesting to let Codex or Claude Code do it :)

Using css perspective for parallax has been around for years and is much simpler code.

there is a special place in hell for pages like these that don't show examples

Love the one-variable design where scale and translate stay in sync automatically, just wish Firefox would get off the flag already.

• dandep

  today at 12:26 PM

  Thanks!

In a world where it's increasingly overlooked, I'm glad the author mentions disabling it respecting user settings. I do think it should be reversed and only enabled with the `@media (prefers-reduced-motion: no-preference)`, but that is the opinion of someone who gets negative value from animations and is bemused by how much dev and compute time is spent on them.

could this be combined with a sprite like image that shows a slightly different angle of the image with each step

Idk about anyone here but I find the effect disorienting.

• amon_spek

  today at 12:33 PM

  Yes. I'm a little more sensitive than average, but not enough to turn off animations, and this is uncomfortable.

I get motion sickness from this specific effect. Especially on high refresh rate screens.

Hey, where's the demo?

Great. I tried the Google examples a while ago and got nowhere with it, time for another go, within the netherworld of SVG, to map to several different layers.

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