Bug 301450

Summary: Show Largest Contentful Paints in the timeline and event list
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Web InspectorAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: inspector-bugzilla-changes, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Screenshot none

Simon Fraser (smfr)
Reported 2025-10-24 15:38:35 PDT
Core Web Vital, which feeds into page rankings (https://developers.google.com/search/docs/appearance/core-web-vitals) introduces Largest Contentful Paint: https://w3c.github.io/largest-contentful-paint Developers will want to see this in the timeline so that they can optimize for it. I think we should show blips in the timeline itself, and entries in the events list below, which associate the LCP with an element.
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Screenshot (743.31 KB, image/png)
2025-10-24 15:52 PDT, Simon Fraser (smfr) 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2025-10-24 15:38:45 PDT
<rdar://160480088>
Simon Fraser (smfr)
Comment 2 2025-10-24 15:48:42 PDT
Pull request: https://github.com/WebKit/WebKit/pull/52976
Simon Fraser (smfr)
Comment 3 2025-10-24 15:52:05 PDT
Created attachment 477195 [details] Screenshot
EWS
Comment 4 2025-10-28 11:51:01 PDT
Committed 302248@main (6e6554f10c46): <https://commits.webkit.org/302248@main> Reviewed commits have been landed. Closing PR #52976 and removing active labels.
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