CSS user-select:none hangs Chrome with large number of select options
Reported by
rupert.r...@gmail.com,
Aug 18 2017
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Issue descriptionUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36 Steps to reproduce the problem: 1. Load local HTML file hang.html 2. Click anywhere in the body except the SELECT box 3. What is the expected behavior? There should be no change to the page and it should remain responsive. In this case, the animated GIF should keep updating. What went wrong? Page hangs for around 30 seconds, during which time there are no updates and the tab cannot be closed. Did this work before? N/A Does this work in other browsers? Yes Chrome version: 60.0.3112.90 Channel: stable OS Version: OS X 10.12.6 Flash Version: Works fine in Safari 10.1.2
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Aug 21 2017
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Aug 21 2017
I guess this is one of functions called during visible position canonicalization. PositionIterator has already skipped SELECT element by using ShouldTraverseChildren() + IsUserSelectContain(). So, we need to find another place of DOM tree traversal.
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Sep 22 2017
Lower to Pri-3, since this is not popular usage pattern.
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Sep 24
This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue. Sorry for the inconvenience if the bug really should have been left as Available. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Sep 26
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Comment 1 by shans@chromium.org
, Aug 21 2017