Guillaume

> It serializes as `NaN` [...] at whatever level it's been able to infect to Thanks for the clarification. My understanding of the spec was that it only serializes as...

> What part of the spec is leading you to believe that a top-level `NaN` doesn't serialize as such? I might have made a mistake. The part that we both...

This comment above says... > [...] the "clamp it to your actual allowed range" behavior that V&U specifies for infinite (and other arbitrarily-large finite) values. ... like this [code comment...

> Yeah, that's just us misusing the syntax a bit. [...], so doing it this way was convenient. `@container` features are not only associated with this rule but also with...

Nit: the definition of [`CSSContainerRule.containerQuery`](https://drafts.csswg.org/css-contain-3/#dom-csscontainerrule-containerquery) should return a list. > The `containerQuery` attribute, on getting, must return the `` that was specified [...] But I am not sure about `CSSContainerRule.name`....