PASS: :first-child only restyles the previous first-child on prepend | styleInvalidations=3, fullStyleInvalidations=0, elementStyleRecomputations=3, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :first-child observers are not restyled when first-child cannot flip | styleInvalidations=2, fullStyleInvalidations=0, elementStyleRecomputations=2, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :last-child only restyles the previous last-child on append | styleInvalidations=3, fullStyleInvalidations=0, elementStyleRecomputations=3, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :last-child observers are not restyled when last-child cannot flip | styleInvalidations=1, fullStyleInvalidations=0, elementStyleRecomputations=1, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :last-child only restyles the new last-child on trailing removal | styleInvalidations=2, fullStyleInvalidations=0, elementStyleRecomputations=2, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :only-child loses on prepend before solo child | styleInvalidations=3, fullStyleInvalidations=0, elementStyleRecomputations=3, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :only-child loses on append after solo child | styleInvalidations=3, fullStyleInvalidations=0, elementStyleRecomputations=3, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :only-child observers are not restyled when only-child cannot start matching | styleInvalidations=2, fullStyleInvalidations=0, elementStyleRecomputations=2, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :first-child precision works when text nodes interleave element siblings | styleInvalidations=3, fullStyleInvalidations=0, elementStyleRecomputations=3, elementStyleNoopRecomputations=1, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :nth-last-child still re-evaluates every previous sibling on append | styleInvalidations=8, fullStyleInvalidations=0, elementStyleRecomputations=8, elementStyleNoopRecomputations=5, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0
PASS: :nth-child still re-evaluates every following sibling on prepend | styleInvalidations=8, fullStyleInvalidations=0, elementStyleRecomputations=8, elementStyleNoopRecomputations=5, elementInheritedStyleRecomputations=0, elementInheritedStyleNoopRecomputations=0, hasAncestorWalkInvocations=0, hasInvalidationMetadataCandidates=0, hasMatchInvocations=0, hasResultCacheHits=0, hasResultCacheMisses=0