This issue is here to track the progress of these selectors so we're prepared to support them when the spec reaches recommendation status. The list below should be updated as the spec changes.

• Subject selector :has()
• :matches()
• Reference combinators /attr/
• :any-link
• :local-link
• :blank
• :nth[-last]-child(An+B of selector)
• case-insensitive attribute comparisons [attr=value i]
• :scope