Bug 24305

Summary: offsetLeft and offsetTop wrong when position of parent node is not static
Product: WebKit Reporter: boris
Component: DOMAssignee: Nobody <webkit-unassigned>
Status: RESOLVED CONFIGURATION CHANGED    
Severity: Normal CC: aharon, ahmad.saleem792, ap, bfulgham, hyatt, mitz, pennig, playmobil, rniwa
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: PC   
OS: Windows XP   
Attachments:
Description Flags
Test case to reproduce the bug
none
Another testcase
none
Modified testcase that prints offsetParent element none

boris
Reported 2009-03-02 16:06:07 PST
offsetLeft and offsetTop do not include the border width of the parent node if the style property 'position' of the parent is not 'static'. In the test case the style property 'position' is changed from 'static' to 'relative'. This change makes Safari (and Firefox and Chrome) return different offsetLeft and offsetTop values. If you add the border width of 15px to those values you get the correct results again. If you open the test case in Internet Explorer and Opera you'll see that they return the same values no matter what 'position' is set to.
Attachments
Test case to reproduce the bug (2.61 KB, text/html)
2009-03-02 16:07 PST, boris 		no flags
Details
Another testcase (1.14 KB, text/html)
2010-12-14 06:19 PST, Jeremy Moskovich 		no flags
Details
Modified testcase that prints offsetParent element (2.75 KB, text/html)
2011-03-07 05:47 PST, Jeremy Moskovich 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
boris
Comment 1 2009-03-02 16:07:59 PST
Created attachment 28202 [details] Test case to reproduce the bug
Jeremy Moskovich
Comment 2 2010-12-14 06:19:28 PST
Created attachment 76530 [details] Another testcase
Alexey Proskuryakov
Comment 4 2010-12-14 11:24:38 PST
See also: <http://www.w3.org/TR/cssom-view/#offset-attributes>.
Jeremy Moskovich
Comment 5 2011-03-07 04:52:09 PST
Did you file a Mozilla bug for this?
Jeremy Moskovich
Comment 6 2011-03-07 05:47:57 PST
Created attachment 84938 [details] Modified testcase that prints offsetParent element
Jeremy Moskovich
Comment 7 2011-03-07 06:46:01 PST
Looks like IE8 behaves differently in quirks and standards mode.
boris
Comment 8 2011-03-07 12:21:35 PST
Here's the Mozilla bug: https://bugzilla.mozilla.org/show_bug.cgi?id=481076
Ahmad Saleem
Comment 9 2022-07-28 12:39:18 PDT
I am unable to reproduce this bug using attached "Modified..." and all browsers (Chrome Canary 106, Firefox Nightly 105 and Safari 15.6 on macOS 12.5) shows following: CSS property 'position' of <p> element: static offsetLeft of <span> element: 35 offsetTop of <span> element: 25 Changing CSS property 'position' ... CSS property 'position' of <p> element: relative offsetLeft of <span> element: 20 (should be 35) offsetTop of <span> element: 10 (should be 25) ____ Since all browsers are showing same, do we need to do something more? Thanks!
Ryosuke Niwa
Comment 10 2022-07-28 13:17:28 PDT
That sounds like config changed to me.
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