Test passes if there is a filled green square and no red.
This tests whether browsers correctly fail the condition for multiple selectors in selector().
Test passes if there is a filled green square and no red.
This tests whether browsers correctly handle negation with an unknown pseudo-element.
Test passes if there is a filled green square and no red.
This tests whether browsers recognize pseudo-elements in the selector() function.
Test passes if there is a filled green square and no red.
This tests whether browsers can handle complex compound selectors in the selector() function.
Test passes if there is a filled green square and no red.
This tests whether browsers give back a valid syntax selector
(obscure edge case CSS used: :nth-child(1 of .foo)) that isn't actually supported.
Test passes if there is a filled green square and no red.
This tests whether browsers can handle passing cascaded selectors.
Test passes if there is a filled green square and no red.
This tests whether browsers correctly identify support for the :has() pseudo-class. This is not supported yet.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.
Test passes if there is a filled green square.