Hello, everyone. It looks strange, that iteration composite operation ( https://w3c.github.io/web-animations/#iteration-composite-operation ) defines only two operations: replace and accumulate. While there are three operations for animation composition:replace, add and accumulate. ( https://w3c.github.io/web-animations/#animation-composition )
Could you explain why 'add' is excluded? Is it typo or there is some reason?
Thanks, Aleksei.
