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conformance · v131

v131 · property-support-string-syntax — 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://drafts.css-houdini.org/css-properties-values-api-1/#supported-names chromestatus: #5083057057693696 generated 2026-06-02T09:02:11Z by codex-auto-research-v131
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id contract kind verdict detail
css-registerproperty-exposed CSS.registerProperty is exposed for typed custom properties. spec ↗ typeof
string-syntax-registers CSS.registerProperty accepts syntax: '<string>'. spec ↗ script
string-value-computes A registered <string> custom property computes a quoted string value. spec ↗ script
unquoted-string-rejected An unquoted token does not satisfy a registered <string> custom property. spec ↗ script
cssom-setproperty-available CSSStyleDeclaration.setProperty is available for assigning registered string custom properties. spec ↗ typeof