Bug 255200 - Implement VisibilityStateEntry
Summary: Implement VisibilityStateEntry
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Page Loading (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2023-04-08 23:43 PDT by Noam Rosenthal
Modified: 2023-04-15 23:44 PDT (History)
5 users (show)

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Description Noam Rosenthal 2023-04-08 23:43:11 PDT 
VisibilityStateEntry is a new performance timeline entry type that tracks page visibility changes. It helps correlate other performance timeline entries with environment state.
New spec change: https://github.com/whatwg/html/pull/8206

See tests: https://wpt.fyi/results/page-visibility/visibility-state-entry.tentative.html?label=experimental&label=master&aligned

Actual results:

The above tests fail

Expected results:

The above tests should succeed

Corresponding Mozilla bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1827127
Corresponding Chromium bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1103451
Spec PR: https://github.com/whatwg/html/pull/8206
Comment 1 Radar WebKit Bug Importer 2023-04-15 23:44:16 PDT 
<rdar://problem/108101344>