[css-syntax][css-transforms] NaN and Infinity in 'transform' #1343
Description
The DOMMatrix API uses unrestricted double IDL type for its attributes, which can use NaN, -Infinity, Infinity. Then matrix.toString() might return e.g. "matrix(Infinity, 0, 0, NaN, 0, 0)". And that fails to parse when passed to new DOMMatrix() constructor since Infinity and NaN are invalid CSS keywords.
Why not add those keywords to CSS (and a new value type like <unrestricted-number>)? They could still be invalid for everything other than 'transform' or some select places where they could make sense.