Bug 266314 – offsetLeft - Abs-positioned objects should move with inline rel-positioned containers when the latter change width

• Component: Layout and Rendering
• Status: NEW

[Ahmad Saleem]

Hi Team,

While going through Blink's commit, I came across another failing test case:

Test Case: https://jsfiddle.net/3oeLbauz/1/show

^ Fails in STP184 / WebKit ToT. Passes above in Chrome Canary 122 and Firefox Nightly 122.

Blink Commit: https://src.chromium.org/viewvc/blink?view=revision&revision=179335

Merging above 1-1 still does not fix the bug.

Just wanted to raise so we can fix it.

Thanks!

[Karl Dubost]

OM JSFIDDLE

The difference is happening with the value of offsetLeft
the test is checking:

expectedOffset: 118
var totalLeft = node.clientLeft + node.offsetLeft;

Safari
node.clientLeft: 4
node.offsetLeft: 54

Firefox
node.clientLeft: 4
node.offsetLeft: 114

but the test is probably subtle because if I try to isolate it in its own file. I see different results in between Firefox and Nightly.
 

Let's upload the testcase

[Karl Dubost]

Created attachment 469052 [details]
testcase

Safari
clientLeft: 4 
offsetLeft: 54

Firefox
clientLeft: 4 
offsetLeft: 124

Chrome
clientLeft: 4 
offsetLeft: 114

[Karl Dubost]

Created attachment 469053 [details]
rendering in safari, firefox, chrome

[Karl Dubost]

Some previous issues about offsetLeft
https://bugs.webkit.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&list_id=9926633&query_format=advanced&short_desc=offsetLeft&short_desc_type=allwordssubstr

[Radar WebKit Bug Importer]

<rdar://problem/119698824>

[Ahmad Saleem]

Chromium Commit - https://github.com/chromium/chromium/commit/420ee472456a2ed228065420e91252059a6d36de

Since SVN repo is gone.