[css-values-5][cssom] How should modifiers be used when fetching a stylesheet from an @import rule?

[weinig]

As far as I can find, stylesheet fetching uses the algorithm in cssom, fetch a style sheet and does not include use of any of CSS Values 4, fetch a style resource.

As such, for an @import rule, which uses the production so can have URL modifiers, its not clear how exactly those modifiers should apply to the fetch.

(cc @noamr, @annevk, @tabatkins, @fantasai)

[AtkinsSJ]

Further comments from #12148:

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"Fetch an import" step 3 says:

3. Let parsedUrl be the result of the URL parser steps with rule’s URL and parentStylesheet’s location. If the algorithm returns an error, return. [CSSOM]

The resulting parsedURL won't have any of the s that the original @import's URL may have had, when it is then passed to "fetch a style resource".

It's also confusing that we parse the URL here, and then step 3 of "fetch a style resource" parses the URL again:

3. Let parsedUrl be the result of the URL parser steps with urlValue’s url and base. If the algorithm returns an error, return.

Maybe "fetch an import" step 3 is just redundant?

[noamr]

@weinig I believe what you're looking for is fetch an import?