On Wed, Jun 17, 2026 at 11:23 AM Rick Byers <[email protected]> wrote:
> Happy to see this ship (after apparently dropping the ball on it myself > <https://github.com/w3c/pointerevents/issues/587#issuecomment-3740724369> > over a decade ago)! > > Shouldn't there at least be a WPT for the existence of the `momentum` > (i.e. in the IDL tests for WheelEvent)? > Yes, we have a test already for idl coverage, thanks for the catch! I updated the chromestatus entry to mention this: pointerevents/idlharness.https.window.html <https://wpt.fyi/results/pointerevents/idlharness.https.window.html?label=experimental&label=master&aligned> (see "attribute momentum"). Ideally there'd also be a test that verifies the bool gets plumbed > through, i,.e. by extending webdriver wheel actions. Might web developers > need that for proper automated testing of these advanced scrolling UX? Can > you at least file a bug to track the missing automation here? I'm OK not > blocking shipping on that if you prefer. > I filed this feature request for TestDriver: web-platform-tests/wpt/issues/60724 <https://github.com/web-platform-tests/wpt/issues/60724> > Rick > > On Wed, Jun 17, 2026 at 11:17 AM Yoav Weiss (@Shopify) < > [email protected]> wrote: > >> Is it possible to share an explainer (even an inline one) RE the use >> cases for this and how we expect developers to use this? >> > A custom scroll curve that decays faster during the momentum phase comes to mind. I believe we can review web developers' comments about it to find more use cases (for context, this feature appears in the top third of the spec-reactions <https://foolip.github.io/spec-reactions/#:~:text=w3c/pointerevents%23587> dashboard). Unfortunately, I'll need some time before I can complete a useful demo. > >> On Tuesday, June 16, 2026 at 9:56:47 PM UTC+2 Mustaq Ahmed wrote: >> >>> On Tue, Jun 16, 2026 at 3:32 PM Mike Taylor <[email protected]> >>> wrote: >>> >>>> >>>> On 6/16/26 11:21 a.m., Chromestatus wrote: >>>> >>>> *Contact emails* >>>> [email protected] >>>> >>>> *Specification* >>>> https://w3c.github.io/pointerevents/#dom-wheelevent-momentum >>>> >>>> *Summary* >>>> The wheel events on many native platforms simulate scrolling inertia: >>>> the events continue to fire for a while after the user has lifted the >>>> finger from the trackpad after a fling interaction. This feature exposes a >>>> momentum attribute in wheel events which is true only for those simulated >>>> events, differentiating them from the events fired during the physical >>>> scroll interaction. This lets web developers ignore fling events or >>>> customize rich fling effects. >>>> >>>> *Blink component* >>>> Blink>Input >>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EInput%22> >>>> >>>> *Web Feature ID* >>>> Missing feature >>>> >>>> *Motivation* >>>> *No information provided* >>>> >>>> *Initial public proposal* >>>> *No information provided* >>>> >>>> *TAG review* >>>> This feature is too small and non-controversial to justify a TAG >>>> review. >>>> >>>> *TAG review status* >>>> Not applicable >>>> >>>> *Goals for experimentation* >>>> None >>>> >>>> *Risks* >>>> >>>> >>>> *Interoperability and Compatibility* >>>> *No information provided* >>>> >>>> *Gecko*: Positive ( >>>> https://lists.w3.org/Archives/Public/public-pointer-events/2026JanMar/0148.html#:~:text=smaug%3A%20just%20having%20a%20flag%20should%20be%20easy.%20we%27ll%20just%20have%20to%20do%20%0Asomething%20on%20linux) >>>> Supported >>>> the feature during PEWG meeting on 2026-03-11. >>>> >>>> *WebKit*: No signal >>>> >>>> Can we file real vendor position issues for Gecko and WebKit (but, nice >>>> to see the comments from Olli)? >>>> >>> >>> Filed standard position requests: >>> https://github.com/mozilla/standards-positions/issues/1425 and >>> https://github.com/WebKit/standards-positions/issues/688 >>> >>> >>>> *Web developers*: Positive ( >>>> https://github.com/w3c/pointerevents/issues/587) See the dev >>>> discussion and also many thumbs-up emojis. >>>> >>>> *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)?* >>>> No >>>> >>>> *Is this feature fully tested by web-platform-tests >>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* >>>> No >>>> >>>> >>>> *Flag name on about://flags* >>>> *No information provided* >>>> >>>> *Finch feature name* >>>> WheelEventMomentum >>>> >>>> *Rollout plan* >>>> Will ship enabled for all users >>>> >>>> *Requires code in //chrome?* >>>> False >>>> >>>> *Tracking bug* >>>> https://crbug.com/40704952 >>>> >>>> *Estimated milestones* >>>> Shipping on desktop 151 >>>> Shipping on Android 151 >>>> Shipping on WebView 151 >>>> >>>> *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). >>>> *No information provided* >>>> >>>> *Link to entry on the Chrome Platform Status* >>>> https://chromestatus.com/feature/6631012282007552?gate=5864164607262720 >>>> >>>> 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/6a3169e4.9a65a9ce.314fea.0299.GAE%40google.com >>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6a3169e4.9a65a9ce.314fea.0299.GAE%40google.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>>> -- >> 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/9807a897-2c36-4ce5-8e1e-244f92f33139n%40chromium.org >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/9807a897-2c36-4ce5-8e1e-244f92f33139n%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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