Pseudo classes in @starting-style lead to incorrect results #24

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opened 2026-02-16 15:36:52 +01:00 by SirPepe · 2 comments

SirPepe commented

2026-02-16 15:36:52 +01:00

(Migrated from github.com)

Input:

@starting-style {
  dialog:open {
    color: red;
  }
}

Result:

StyleSheet(AtRule(AtKeyword,Block("{",Declaration(PropertyName,":",ValueName,BracedValue("{",ValueName,":",ValueName,";","}")),"}")))

Without ":open" the result makes more sense:

@starting-style {
  dialog {
    color: red;
  }
}

Result:

StyleSheet(AtRule(AtKeyword,Block("{",RuleSet(TagSelector(TagName),Block("{",Declaration(PropertyName,":",ValueName),";","}")),"}")))

Input: ```css @starting-style { dialog:open { color: red; } } ``` Result: ``` StyleSheet(AtRule(AtKeyword,Block("{",Declaration(PropertyName,":",ValueName,BracedValue("{",ValueName,":",ValueName,";","}")),"}"))) ``` Without ":open" the result makes more sense: ```css @starting-style { dialog { color: red; } } ``` Result: ``` StyleSheet(AtRule(AtKeyword,Block("{",RuleSet(TagSelector(TagName),Block("{",Declaration(PropertyName,":",ValueName),";","}")),"}"))) ```

marijnh commented

2026-02-16 15:44:56 +01:00

(Migrated from github.com)

Indeed, seems both parses were valid and getting the same score, causing the parser to pick the wrong one. Attached patch should help.

👍 1

SirPepe commented

2026-02-16 15:46:16 +01:00

(Migrated from github.com)

Great, thank you. No more issues incoming from my side 🙃

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lezer/css#24

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