perf(ButtonGroup): Scope :has() selector to direct child for O(1) lookup#7328
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mattcosta7 wants to merge 2 commits intomainfrom
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perf(ButtonGroup): Scope :has() selector to direct child for O(1) lookup#7328mattcosta7 wants to merge 2 commits intomainfrom
mattcosta7 wants to merge 2 commits intomainfrom
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Summary
Performance optimization for ButtonGroup CSS selector to improve INP.
Changes
Scope
:has(div:last-child:empty)to direct child with>combinator.Expected INP Impact
Why this matters
The original selector scanned the entire subtree looking for an empty div. ButtonGroup interactions (hover, focus) trigger style recalc. By scoping to direct children, we get O(1) lookup.
Part of the INP performance optimization effort. See #7312 for full context.