LGTM2 - excited to see this ship! On Wed, Nov 19, 2025 at 12:05 PM 'Adam Argyle' via blink-dev < [email protected]> wrote:
> +1 positive developer signal; from a personal site author and Shopify > front-end perspective > > On Tuesday, November 18, 2025 at 12:23:01 PM UTC-8 Chromestatus wrote: > >> *Contact emails* >> [email protected] >> >> *Explainer* >> https://github.com/explainers-by-googlers/scroll-triggered-animations >> >> *Specification* >> https://drafts.csswg.org/css-animations-2/#timeline-triggers >> >> *Design docs* >> >> >> https://github.com/explainers-by-googlers/scroll-triggered-animations/blob/main/README.md >> >> *Summary* >> This feature adds scroll-position-based control of animations, e.g. >> playing, pausing, and resetting an animation. A common pattern on pages >> across the web is to kick off an animation when a scroll position is >> reached. Developers often do this by using JavaScript to manually detect >> that an element is within its scroll container's viewport and to kick off a >> corresponding animation (e.g. perhaps sliding that element into view). Many >> of such use cases are based on information that can be provided >> declaratively. This feature gives authors the ability to create such >> interactions declaratively via CSS, allowing the user agent to offload the >> handling of this interaction to a worker thread. The API also includes >> JavaScript interfaces that allow the feature to be extended to web >> animations in addition to CSS animations. >> >> *Blink component* >> Blink>CSS >> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECSS%22> >> >> *Web Feature ID* >> Missing feature >> >> *Motivation* >> Kicking off animations after having reached a desired scroll position is >> a common pattern on the web. Achieving this requires JavaScript to know >> when to trigger an animation. However, in many cases, all the information >> needed for many use cases can be declaratively specified. This feature >> provides authors a robust, reliable, performant and convenient way to set >> up such animations in response to scrolling. >> >> *Initial public proposal* >> https://github.com/w3c/csswg-drafts/issues/8942 >> >> *TAG review* >> https://github.com/w3ctag/design-reviews/issues/1167 >> >> *TAG review status* >> Pending >> >> *Risks* >> >> >> *Interoperability and Compatibility* >> *No information provided* >> >> *Gecko*: No signal ( >> https://github.com/mozilla/standards-positions/issues/1315) >> >> *WebKit*: No signal ( >> https://github.com/WebKit/standards-positions/issues/576) >> >> *Web developers*: No signals >> >> *Other signals*: >> >> *WebView application risks* >> >> Does this intent deprecate or change behavior of existing APIs, such that >> it has potentially high risk for Android WebView-based applications? >> *No information provided* >> >> >> *Debuggability* >> *No information provided* >> >> *Will this feature be supported on all six Blink platforms (Windows, Mac, >> Linux, ChromeOS, Android, and Android WebView)?* >> Yes >> >> *Is this feature fully tested by web-platform-tests >> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* >> Yes >> >> https://wpt.fyi/results/?label=master&label=experimental&aligned&q=scroll-animations%2Fanimation-trigger >> >> *DevTrial instructions* >> >> https://github.com/explainers-by-googlers/scroll-triggered-animations/blob/main/DEV_TRIALS.md >> >> *Flag name on about://flags* >> *No information provided* >> >> *Finch feature name* >> *No information provided* >> >> *Non-finch justification* >> *No information provided* >> >> *Rollout plan* >> Will ship enabled for all users >> >> *Requires code in //chrome?* >> False >> >> *Tracking bug* >> https://crbug.com/390314945 >> >> *Availability expectation* >> Feature is expected to become available on WebPlatform Baseline. >> >> *Adoption expectation* >> We expect the feature to meet the needs of many scroll related animation >> use cases on the web. >> >> *Adoption plan* >> We plan to work with interested developers (of which we have at least 2 >> at the moment). We also plan to have a blog post. >> >> *Estimated milestones* >> Shipping on desktop 144 >> DevTrial on desktop 144 >> Shipping on Android 144 >> DevTrial on Android 144 >> Shipping on WebView 144 >> >> *Anticipated spec changes* >> >> Open questions about a feature may be a source of future web compat or >> interop issues. Please list open issues (e.g. links to known github issues >> in the project for the feature specification) whose resolution may >> introduce web compat/interop risk (e.g., changing to naming or structure of >> the API in a non-backward-compatible way). >> This feature is also intended to be supported via the web animations API >> but only the CSS animations spec is up to date. We expect the Web >> Animations spec to be closely related to the CSS spec/syntax and plan to >> update the Web Animations spec after addressing any feedback that arises >> from the CSS spec. We filed CSS working group issue >> https://github.com/w3c/csswg-drafts/issues/13010 for feedback on the CSS >> spec. >> >> *Link to entry on the Chrome Platform Status* >> https://chromestatus.com/feature/5181996801982464?gate=5104214340272128 >> >> *Links to previous Intent discussions* >> Intent to Prototype: >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAA6pwF6yEmATfHMv4RCp%2B6F_ufem%2Bt3%3D4maF15ySCKGXfCxb3w%40mail.gmail.com >> Ready for Trial: >> https://groups.google.com/a/chromium.org/g/blink-dev/c/Gw42-BxHqcs/m/baT_KRxkAgAJ >> >> >> This intent message was generated by Chrome Platform Status >> <https://chromestatus.com>. >> > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/82cdbd0a-3915-4cae-8f45-56982a1e0b54n%40chromium.org > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/82cdbd0a-3915-4cae-8f45-56982a1e0b54n%40chromium.org?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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