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Serialize out of range values as calcs #647

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Serialize out of range values as calcs #647

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4 changes: 3 additions & 1 deletion css-typed-om/Overview.bs
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Expand Up @@ -360,7 +360,9 @@ probably in an appendix.
: If |value| is a {{CSSStyleValue}},
:: If |value| does not [=match a CSS production|match the grammar=] of a [=list-valued property iteration=] of |property|,
[=throw=] a {{TypeError}} and exit this algorithm.
Otherwise, return the |value|.
If the |property| only allows certain values, and is passed a {{CSSUnitValue}} |value| that is outside that range,
wrap |value| in a {{CSSMathSum}}, with only one entry in |values|, so that it serializes to 'calc(' + |value| + ')'.
Return the |value|.

: If |value| is a {{DOMString}},
:: [=Parse a CSSStyleValue=] with property |property|, cssText |value|, and parseMultiple set to `false`,
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