Allow @font-face rules nested inside @media rules#68
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jaraco merged 3 commits intojaraco:mainfrom Apr 14, 2026
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Per MDN's At-Rules Nesting documentation, @font-face is allowed inside conditional at-rules like @media. However, cssutils was rejecting them with "This rule is not allowed in CSSMediaRule". This moves @font-face from the disallowed rules list to the factories dict in the CSS text parser, and removes CSSFontFaceRule from the rejected types in insertRule(). Fixes jaraco#30
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I force pushed the amended commit after removing the .pyc and commit_msg.txt files. |
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As reported in #30,
@font-facerules nested inside@mediablocks are incorrectly rejected with:Per MDN's At-Rules documentation,
@font-faceis valid inside conditional at-rules like@media. This is also common in real-world CSS, e.g. Google Fonts serves@font-facewrapped in@media screen.The issue was in two places in
cssmediarule.py:The CSS text parser's
atrulehandler had@font-facein the disallowed list instead of the factories dict. Moved it to factories so it gets parsed as aCSSFontFaceRule.insertRule()was rejectingCSSFontFaceRuleinstances. Removed that check so font-face rules can be inserted programmatically too.Added a test covering both the parsing path and the
insertRule()path. All existing tests continue to pass.