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"Arbitrary substitution functions" are a family of functions that includes var() and attr(). All of them resolve to an arbitrary set of component values that are not known at parse-time, so they have to be substituted at computed-value time. Besides it being nice to follow the spec closely, this means we'll be able to implement the others (such as `if()` and `inherit()`) more easily. The main omission here is the new "spread syntax", which can be implemented in the future. |
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| .. | ||
| var-parsing.txt | ||
| variable-css-wide-keywords.txt | ||
| variable-cycles.txt | ||
| variable-empty-name-reserved.txt | ||