Interaction of "constructed flag" and @import rules doesn't quite make sense to me

[bzbarsky]

https://wicg.github.io/construct-stylesheets/#dom-cssstylesheet-insertrule disallows adding an @import rule if "constructing flag" is set. Why is this restriction present?

In particular, why do we allow adding an @import rule to a sheet imported from a sheet with the "constructed flag" but not to the parent sheet itself?

[rakina]

I think you made an issue on this: #56, and it was also discussed in #57 (comment) that we don't want to allow insertion of @import rules?

[bzbarsky]

#56 said "or any of their imports". That's not what the current spec says, though: it disallows @import insertion into the constructed sheet, but allows it into its imports. So the changes that were made didn't really address #56 as filed.

[rakina]

Ohh, I understand now. Can we maybe say something like "If this sheet's parent chain contains at least one sheet whose constructed flag is set, throw exception"?

[bzbarsky]

That seems fairly reasonable at first glance.

[rakina]

Resolved with #88