LGTM2 On Wed, May 13, 2026 at 8:16 AM Alex Russell <[email protected]> wrote:
> LGTM1 > > On Monday, May 11, 2026 at 11:58:26 AM UTC-7 Chromestatus wrote: > >> *Contact emails* >> [email protected] >> >> *Explainer* >> >> https://github.com/vmpstr/htmldemos/blob/master/gestures/overscroll-behavior-chain.md >> >> *Specification* >> https://drafts.csswg.org/css-overscroll-1/#propdef-overscroll-behavior >> >> *Summary* >> overscroll-behavior currently has 3 values: none, auto, and contain. >> These values affect 2 independent effects: scroll propagation and local >> border effect (e.g. overscroll stretch). none: no propagation, no local >> effect auto: propagation, local effect contain: no propagation, local >> effect This feature tracks a new value to complete the set: chain: >> propagation, no local effect This is useful for effects like side menus >> implemented as scrollers. We want to bring the menu in and when it hits the >> edge it doesn't overscroll (stretch/translate). However, it would then >> allow scroll chaining to the ancestor. Initial proposal: >> https://github.com/w3c/csswg-drafts/issues/13370 >> >> *Blink component* >> Blink>Scroll >> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EScroll%22> >> >> *Web Feature ID* >> overscroll-behavior <https://webstatus.dev/features/overscroll-behavior> >> >> *Motivation* >> This feature is useful for effects like side menus implemented as >> scrollers. We want to bring the menu in and when it hits the edge it >> doesn't overscroll (stretch/translate). However, it would then allow scroll >> chaining to the ancestor. There may be other effects that want to prevent >> overscroll effects but allow chaning >> >> *Initial public proposal* >> https://github.com/w3c/csswg-drafts/issues/13370 >> >> *TAG review* >> https://github.com/w3ctag/design-reviews/issues/1228 >> >> *TAG review status* >> Pending >> >> *Goals for experimentation* >> None >> >> *Risks* >> >> >> *Interoperability and Compatibility* >> *No information provided* >> >> *Gecko*: No signal ( >> https://github.com/mozilla/standards-positions/issues/1406) >> >> *WebKit*: No signal ( >> https://github.com/WebKit/standards-positions/issues/661) >> >> *Web developers*: No signals We've had some use-cases in other features >> (overscroll gestures) where this behavior was needed to avoid awkward >> interactions >> >> *Other signals*: >> >> *Ergonomics* >> None >> >> *Activation* >> None >> >> *Security* >> None >> >> *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* >> This is debuggable as other CSS properties >> >> *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>?* >> Yes >> >> https://wpt.fyi/results/css/css-overscroll-behavior?label=master&label=experimental&aligned&q=overscroll-behavior >> (Added via https://github.com/web-platform-tests/wpt/pull/59792) >> >> *Flag name on about://flags* >> *No information provided* >> >> *Finch feature name* >> CSSOverscrollBehaviorChain >> >> *Rollout plan* >> Will ship enabled for all users >> >> *Requires code in //chrome?* >> False >> >> *Tracking bug* >> https://issues.chromium.org/issues/499018879 >> >> *Estimated milestones* >> Shipping on desktop 150 >> Shipping on Android 150 >> Shipping on WebView 150 >> >> *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/5176802466201600?gate=4784727853760512 >> >> *Links to previous Intent discussions* >> Intent to Prototype: >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/69ceb225.050a0220.1c79a0.01ba.GAE%40google.com >> >> >> 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/1486bba8-40b7-44c9-af56-8b609aa5bf2fn%40chromium.org > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/1486bba8-40b7-44c9-af56-8b609aa5bf2fn%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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