JavaScript ΛΘͳ͍දݱ
• CSS HTML ͚ͩͰදݱͰ͖Δͷ૿͖͍͑ͯͯΔͷͰͦΕΛ
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• CSS Custom Properties, CSS Container Queries
• required, pattern, popover attributes
• :where, :is, :has, :user-valid, :user-invalid classes
• :nth-child(*** of ***), :focus-visible, :focus-within classes
• , elements