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conformance · v148

v148 · content-type-in-resource-timing — conformance probe

6 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/resource-timing/ chromestatus: #5156068351541248 generated 2026-06-06T05:04:08Z by codex-auto-research
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id contract kind verdict detail
performance-resource-timing-exists PerformanceResourceTiming is the interface the contentType field is added to. spec ↗ exists
content-type-on-prototype PerformanceResourceTiming.prototype defines a contentType getter. spec ↗ script
supported-entry-types-resource 'resource' remains in PerformanceObserver.supportedEntryTypes. spec ↗ script
get-entries-by-type-resource performance.getEntriesByType('resource') returns an array of resource entries. spec ↗ script
content-type-is-string When a resource entry exists, its contentType is a string (possibly empty when TAO is not granted). spec ↗ script
same-origin-css-content-type-entry A same-origin fetch for a CSS resource produces a resource timing entry whose contentType matches the server Content-Type. spec ↗ script