[Webkit-unassigned] [Bug 204201] New: Once prevented touchmove cannot continue scroll

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204201

            Bug ID: 204201
           Summary: Once prevented touchmove cannot continue scroll
           Product: WebKit
           Version: Safari 13
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: UI Events
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dantaeusb at live.com

## Description

Once event.preventDefault() called in touchmove passive event handler scroll will not continue even if preventDefault() is no longer called in event handler.

This blocks solving situations when you want to have scroll thresholds: e.g., if you need to determine what user do in some kind of gallery or let's say 360 viewer.

## Example

https://jsfiddle.net/nerj63vy/2/view
https://jsfiddle.net/nerj63vy/2

## Expected behavior

Like in Chrome, really check what event listener does and don't prevent scrolling if default action is no longer prevented.

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