FOUC body[unresolved] should be [unresolved]

[ebidel]

The [unresolved] attribute is no longer available for use on single elements. It's only applicable to body now:

This means apps have less flexibility when it comes to controlling their own FOUC. Why did we change to just body?

[sjmiles]

You can still put unresolved attribute on any custom element and the polyfill will remove that attribute when the element is upgraded. We leave it up to the developer to decide how to use that information.

We have special sauce for body just because it provides an easy solution for simple pages.

[ebidel]

Thanks for clarifying. A quick heads up on changes like this would be good. Keeps our docs from getting stale every week :)

[ebidel]

Updated the docs.