Module context Copy item path Source MatchingContext Data associated with the matching process for a element. This context is
used across many selectors for an element, so it’s not appropriate for
transient data that applies to only a single selector. SelectorCaches Set of caches (And cache-likes) that speed up expensive selector matches. IncludeStartingStyle The mode to use whether we should matching rules inside @starting-style.
https://drafts.csswg.org/css-transitions-2/#starting-style MatchingForInvalidation Whether we’re matching in the contect of invalidation. MatchingMode What kind of selector matching mode we should use. NeedsSelectorFlags Whether we need to set selector invalidation flags on elements for this
match request. QuirksMode Which quirks mode is this document in. VisitedHandlingMode The mode to use when matching unvisited and visited links.