Bug 254238

Summary:	Web Inspector: breakpoint on content modification is not persistent
Product:	WebKit	Reporter:	Karl Dubost <karlcow>
Component:	Web Inspector	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	inspector-bugzilla-changes, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	All
OS:	All

Description Karl Dubost 2023-03-21 15:50:29 PDT

1. with Safari Tech Preview 165
2. Go to https://www.pinterest.com/
3. Log in
4. Open Web Inspector
5. Go to the Elements tab
6. Find #homefeedGridFadeInTransitionContainer > div > div aka (<div style="width: 100%">…)
7. Control+click on this element
8. Select "Break on…", choose: "subtree modified" or/and "node removed"
9. Shift + reload

Expected:
Stop when the subtree is being modified. 

Actual:
Nothing happens, the page just reload, but the breakpoint was not effective


10. Check the Sources tab

Expected:
Breakpoint is visible

Actual:
Breakpoint is gone.


11. Close Web Inspector and Reopen Web Inspectore
12. Go to Sources tab, the breakpoint is visible again.

Comment 1 Radar WebKit Bug Importer 2023-03-21 15:50:39 PDT

<rdar://problem/107026006>

Comment 2 Karl Dubost 2023-03-21 15:54:27 PDT

Additional test

Break On: Node Removed

for #__PWS_ROOT__

which is at a either level of hierarchy exhibits the same issue.