[Webkit-unassigned] [Bug 174300] New: [WK2] Ignore touch events that interrupt UIKit-driven momentum scrolling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174300

            Bug ID: 174300
           Summary: [WK2] Ignore touch events that interrupt UIKit-driven
                    momentum scrolling
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: wenson_hsieh at apple.com

In https://trac.webkit.org/r211197, we decreased the scroll deceleration rate in web content to match the rest of the iOS platform. However, due to the much longer duration of the momentum scrolling phase, many users are tapping during momentum scrolling to stop scroll deceleration -- this, in turn, leads to many unwanted or accidental taps in web content on pages such as images.google.com.

One potential way to resolve this is to prevent touches that interrupt momentum scrolling from propagating DOM touch events.

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