Scrollbar flicker in iframe with specific element composition.
Reported by
m.sam...@cksource.com,
Jan 17 2018
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Issue descriptionUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 Steps to reproduce the problem: 1. Open this code sample: https://codepen.io/msamsel/pen/JMmLJE 2. Move cursor over the images or type sth in paragraph What is the expected behavior? Scrollbar is not flickering What went wrong? Scrollbar flickers Did this work before? No Does this work in other browsers? Yes Chrome version: 63.0.3239.132 Channel: stable OS Version: OS X 10.13.2 Flash Version: I also test it in Canary, problem exists there as well. I suspect that problem might be related to giving 25% width style to float element. What might result with different calculation of scrollbar.
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Jan 17 2018
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Jan 17 2018
Bisect info: 471270 (good) - 471275 (bad) https://chromium.googlesource.com/chromium/src/+log/e2e34549..54a03d79?pretty=fuller Suspecting r471275 = 54a03d79877c3cacd79e37e33ec715abb3460bd7 = https://crrev.com/2860433002 by szager@chromium.org "Update WebView/FrameView size from LayoutView::UpdateAfterLayout" Landed in 60.0.3098.0
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Jan 18 2018
For what it's worth, you might be unable to repro linked sample depending on your screen resolution/orientation. It **does** reproduce for me on a vertical orientation: see chrome-flickering-vertical.mp4 And it **does not** in a horizontal orientation: see chrome-flickering-horizontal.mp4 The difference between the two is that in horizontal Chrome displays a fixed scroll bar right after rendering it.
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Jan 19 2018
Able to reproduce the issue on Windows 10. Mac OS 10.12.6 and Ubuntu 14.04 on latest stable 63.0.3239.132 and Canary 65.0.3324.0 by following the steps mentioned in the original comment. Bisect Information: ==================== Good build: 60.0.3097.0 (Revision - 471158) Bad Build : 60.0.3098.0 (Revision - 471507) By executing the per-revision bisect script. below is the Changelog URL. Change Log URL: ================ https://chromium.googlesource.com/chromium/src/+log/bb9147ed072a94397e8d448ba7445c8f214230f3..54a03d79877c3cacd79e37e33ec715abb3460bd7 From the above change log suspecting the below change Review-Url: https://codereview.chromium.org/2860433002 szager@ - Can you please check if the this issue is caused with respect to your change, else help us in assigning to the right owner. Thanks..
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Jan 19 2018
Just FYI: I noticed that the issue probably concerns the content of the top window too, making it more generic. There are very similar symptoms described in https://github.com/ckeditor/ckeditor5/issues/764. |
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Comment 1 by dtapu...@chromium.org
, Jan 17 2018