feat: minify colors in var() fallback values - #1143
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For security purposes, a whitelist mechanism has been added, which only takes effect for color-related properties and within `var()` expressions.
Add support for minifying colors inside var() fallback values when usedwithin CSS gradient functions and image-related properties. Changes: - Rename `COLOR_KEYWORDS` to `MINIFY_COLORS_IN_FN` - Extend has_color_function() to include more gradient functions and `image-set()`: - Update tests to verify color minification in var() fallbacks
yisibl
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February 2, 2026 02:39
Preserve parsing context when reading var() fallbacks inside unparsed property token lists, so color-ident minification respects function-level whitelisting instead of being reapplied as top-level parsing. e.g. Added/updated regression tests in test_custom_properties covering: non-whitelisted function: foo(var(--c, blue)) should keep blue,
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…colors Pass function-level `TokenListParseOptions` into `UnresolvedColor::parse` so `light-dark(...)` arguments inherit the same color-ident minification context as the surrounding function parse. In the unresolved `light-dark` branch, parse light/dark arguments with `TokenList::read_token_list(..., parse_options)` instead of `TokenList::parse(...)`, so `var()` fallbacks can be minified where allowed while still respecting non-whitelisted nested functions.
yisibl
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February 8, 2026 17:10
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@devongovett This is ready for review, PTAL |
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@devongovett ping~ |
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Fixes: #601