[Webkit-unassigned] [Bug 164949] New: -webkit-overflow-scrolling: touch completely breaks 3D perspective functionality

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164949

            Bug ID: 164949
           Summary: -webkit-overflow-scrolling: touch completely breaks 3D
                    perspective functionality
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aghassemi+bugzilla at gmail.com

CSS perspective and translateZ provide an efficient way of creating scroll parallax effect however in iOS Safari, adding -webkit-overflow-scrolling: touch; completely breaks all the 3D and perspective effects.

Please see http://codepen.io/aghassemi/pen/QGdKbZ for an example. The only difference between the two divs is the value of webkit-overflow-scrolling but notice how perspective is ignored on the second div.

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