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conformance · v135

v135 · enabling-web-applications-to-understand-bimodal-performance-timings — conformance probe

5 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://w3c.github.io/navigation-timing/ chromestatus: #5186950448283648 generated 2026-06-01T09:25:00Z by conformance-author-v1-subagent
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id contract kind verdict detail
performance-navigation-entry-exists PerformanceNavigationTiming is exposed — the entry that now carries confidence info. spec ↗ exists
confidence-prop-on-navigation-entry PerformanceNavigationTiming.prototype.confidence is exposed. spec ↗ script
get-entries-by-type-navigation-works performance.getEntriesByType('navigation') returns an array (entries readable from script). spec ↗ script
navigation-entry-instance-has-confidence An instance of PerformanceNavigationTiming exposes a confidence property (may be null). spec ↗ script
performance-observer-supported PerformanceObserver is exposed — the recommended observation API for navigation timing. spec ↗ exists