RESOLVED DUPLICATE of bug 224415 218330
Caption of table causes offset on sticky positioned table elements 
https://bugs.webkit.org/show_bug.cgi?id=218330
Summary Caption of table causes offset on sticky positioned table elements
Derk-Jan Hartman
Reported 2020-10-29 04:36:51 PDT
Created attachment 412633 [details] testcase with and without caption When you use position:sticky; top:0; on a table element, you expect this element to stick to the top of the overflowing frame. This usually works, unless you also have a <caption> element on your table. The caption elements have rather unique box model behavior, which introduces an offset that the sticky headers accidentally use as well. I'm not entirely sure if this is per the current specification or not. I do know that it doesn't match my expectations, and it doesn't match the behavior of Chrome and Firefox. I have included a reproduction of this problem showing behavior with and without caption element in a table.
Attachments
testcase with and without caption (1.40 KB, text/html)
2020-10-29 04:36 PDT, Derk-Jan Hartman 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2020-10-29 09:52:20 PDT
<rdar://problem/70813326>
Smoley
Comment 2 2020-11-02 16:20:31 PST
Thanks for filing, this reproduces for me on Safari 13.1.3 as well as STP 115 with the included test case.
Martin Robinson
Comment 3 2021-08-25 03:55:25 PDT
This should be fixed now. *** This bug has been marked as a duplicate of bug 224415 ***
Derk-Jan Hartman
Comment 4 2021-09-01 05:20:45 PDT
@Martin Robinson Are we sure ? I see several other sticky bugs are indeed fixed in my TP, but this specific one still seems to reproduce. At least with: Release 130 (Safari 15.0, WebKit 16612.1.26.1.5)
Derk-Jan Hartman
Comment 5 2021-09-01 05:21:46 PDT
ah the latest TP is from august 18th I see.....
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