[Webkit-unassigned] [Bug 191484] New: scrolling issue with iframe content that resizes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=191484

            Bug ID: 191484
           Summary: scrolling issue with iframe content that resizes
           Product: WebKit
           Version: Safari 12
          Hardware: iPhone / iPad
                OS: iOS 12
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Frames
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: k.vendrik at gmail.com

Created attachment 354377

  --> https://bugs.webkit.org/attachment.cgi?id=354377&action=review

Codepen demo

When the content in an iframe resizes weird scrolling behaviour occurs when typing into a form. In the example below the scrolling jumps up and down when typing. In my app I even ran into issues where it would jump and down on every key press.

Codepen: https://codepen.io/kvendrik/pen/zMBWKg
iFrame Contents Codepen: https://codepen.io/kvendrik/pen/JeKLbd

Demo attached.

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