[Webkit-unassigned] [Bug 186268] New: Focus event dispatched in iframe causes parent document to scroll incorrectly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186268

            Bug ID: 186268
           Summary: Focus event dispatched in iframe causes parent
                    document to scroll incorrectly
           Product: WebKit
           Version: Safari 11
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Major
          Priority: P2
         Component: Frames
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: yann.armelin at amadeus.com

Created attachment 341903

  --> https://bugs.webkit.org/attachment.cgi?id=341903&action=review

test case

On a long page, when focus() is called on an element within an iframe, and if the offsetY of the iframe is > 0, the browser incorrectly scroll after the frame.
It occurs only on non-input HTML elements (like div or span with a tabindex attribute).

The same issue is observed when element.scrollIntoView() is called from an iframe.


I reproduced the issue on iOS (11.3.1), and with a locally built WebKit.




It's very similar to the following closed bug : https://bugs.webkit.org/show_bug.cgi?id=158629 .

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