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conformance · v140

v140 · deprecate-special-font-size-rules-for-h1-within-some-elements — 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://github.com/whatwg/html/pull/11102 chromestatus: #6192419898654720 generated 2026-06-02T00:00:00Z by codex-auto-research
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pass
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fail
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blocked
5
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id contract kind verdict detail
bare-h1-default-font-size A bare top-level h1 still renders at a positive user-agent default font size. spec ↗ script
h1-in-section-uses-base-h1-size An h1 nested in section no longer gets a downsized user-agent style. spec ↗ script
h1-in-article-uses-base-h1-size An h1 nested in article matches the bare h1 font size. spec ↗ script
h1-in-aside-uses-base-h1-size An h1 nested in aside matches the bare h1 font size. spec ↗ script
h1-in-nav-uses-base-h1-size An h1 nested in nav matches the bare h1 font size. spec ↗ script