LibWeb: Treat import rules as invalid if preceded by non-import rules #3283
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If an import statement is preceded by a valid rule that isn't an import rule or a @layer statement rule, it is now treated as invalid.
AtkinsSJ
reviewed
Jan 16, 2025
| auto is_layer_statement_rule = is<CSSLayerStatementRule>(*rule); | ||
| auto is_import_rule = is<CSSImportRule>(*rule); | ||
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| // FIXME: Include @charset rules in this check when they are added. |
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This FIXME isn't necessary. It's confusing, but @charset is a weird beast that isn't actually an at-rule that shows up in the CSSOM. https://drafts.csswg.org/css-syntax/#charset-rule
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...there are order-requirements for @namespace though, and I think some others.
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If an import statement is preceded by a valid rule that isn't an import rule or a @layer statement rule, it is now treated as invalid.
Fixes: http://wpt.live/css/CSS2/css1/c11-import-000.xht