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conformance · v147

v147 · lazy-loading-for-video-and-audio-elements — conformance probe

8 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://html.spec.whatwg.org/multipage/embedded-content.html#attr-media-loading chromestatus: #5200068565139456 generated 2026-06-01T23:35:27Z by conformance-author-v1-subagent
0
pass
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fail
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blocked
8
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id contract kind verdict detail
video-loading-reflected HTMLVideoElement prototype reflects the 'loading' property. spec ↗ exists
audio-loading-reflected HTMLAudioElement prototype reflects the 'loading' property. spec ↗ exists
video-loading-type The 'loading' property of a <video> element is a string. spec ↗ script
video-loading-default The default reflected value of the 'loading' property on <video> is 'eager'. spec ↗ script
video-loading-lazy-value Setting 'loading' to 'lazy' on <video> correctly reflects to property and attribute. spec ↗ script
audio-loading-lazy-value Setting 'loading' to 'lazy' on <audio> correctly reflects to property and attribute. spec ↗ script
video-loading-invalid-value Setting an invalid 'loading' value on <video> falls back to reflecting 'eager'. spec ↗ script
audio-loading-invalid-value Setting an invalid 'loading' value on <audio> falls back to reflecting 'eager'. spec ↗ script