Web-Facing Change PSA: Respect overscroll-behavior for keyboard scrolls

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Nov 11, 2025, 12:42:52 PM (2 days ago) Nov 11

to blin...@chromium.org, fla...@chromium.org, zhoupe...@bytedance.com

Contact emails

fla...@chromium.org, zhoupe...@bytedance.com

Specification

https://www.w3.org/TR/css-overscroll-1

Summary

When you set `overscroll-behavior` to a value other than `auto`, the browser should not perform scroll chaining. We respect this for mouse or touch scrolling, however keyboard scrolls were ignoring it. This change makes keyboard scrolling respect overscroll-behavior as well.

Blink component

Blink>Scroll

Web Feature ID

overscroll-behavior

Risks

Interoperability and Compatibility

Both Firefox and Safari already respect overscroll-behavior when performing keyboard scrolls so the compat risk should be minimal as this will make Chrome behave interoperably with them.

Gecko: Shipped/Shipping

WebKit: Shipped/Shipping

Web developers: No signals

Other signals:

Activation

Developers are already using overscroll-behavior. Likely keyboard scrolling has not been common enough to be a big concern but developers won't need to change their code to take advantage of this.

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

The overscroll-behavior property can easily be inspected in dev tools.

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?

Yes
https://wpt.fyi/results/css/css-overscroll-behavior?label=master&label=experimental&aligned&q=overscroll-behavior-keyboard-scroll

Tracking bug

https://issues.chromium.org/issues/41378182

Estimated milestones