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conformance · v133
v133 · css-open-pseudo-class — 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.
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pass
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fail
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blocked
5
total
| id | contract | kind | verdict | detail |
|---|---|---|---|---|
open-pseudo-supported-selector |
CSS.supports recognises :open as a valid selector. spec ↗ | script | … | |
open-on-details-element |
An open <details> element matches :open. spec ↗ | script | … | |
closed-details-does-not-match-open |
A closed <details> does not match :open. | script | … | |
open-on-dialog-element |
A <dialog> opened via show() matches :open. spec ↗ | script | … | |
open-on-select-element-not-throwing |
Calling .matches(':open') on a <select> does not throw — open select state is in scope for the pseudo-class. | script | … |