[css-animation] Is calc() allowed to be used for the production in the @keyframes prelude? · Issue #10879 · w3c/csswg-drafts (original) (raw)

The production in the @keyframes prelude is defined via the grammar:

= from | to | <percentage [0,100]>

Generally, use of <percentage> implies the ability to use calc(), but it does not seem to be universally implemented that way.

Is the intention of the spec that calc() should be allowed here?