ReadonlyconditionReadonlydelegationReadonlyregionReadonlyscopeReadonlyvalidatorOptionalmodifier: AttributeSelectorCaseSensitivityProtectedendProtectedinsertStatement form of the @layer rule (@layer a, b;), which only declares
the layer order.
ProtectedmakeFor relational pseudo-class :has() support
The name of the function taking a selector list as argument
Optionalparams: (string | number)[]Optional parameters (e.g., [a, b] for nth-child(An+B of S))
Block form of the @layer rule.
null for an anonymous layer, otherwise the parts of the
<layer-name>.
Identity of the declaration block being parsed, for
revert-rule.