LibWeb/CSS: Implement revert-layer

With the introduction of the cascade layer, the 5th CSS-wide keyword, `revert-layer`, has been added.
Author: https://github.com/An-n-ya 🔰 Commit: bea7eec518 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1371 Reviewed-by: https://github.com/AtkinsSJ ✅
2025-08-05 23:59:49 +00:00 · 2024-09-11 20:13:44 +08:00 · 2024-09-11 20:13:44 +08:00 · bea7eec518 · 2024-09-11 21:31:19 +00:00
commit bea7eec518
parent 71d977b791
8 changed files with 70 additions and 5 deletions
--- a/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Userland/Libraries/LibWeb/CSS/Parser/Parser.cpp
@ -1755,7 +1755,10 @@ RefPtr<CSSStyleValue> Parser::parse_builtin_value(TokenStream<ComponentValue>& t
            transaction.commit();
            return CSSKeywordValue::create(Keyword::Revert);
        }
-        // FIXME: Implement `revert-layer` from CSS-CASCADE-5.
+        if (ident.equals_ignoring_ascii_case("revert-layer"sv)) {
+            transaction.commit();
+            return CSSKeywordValue::create(Keyword::RevertLayer);
+        }
    }

    return nullptr;