exempt data URL CSS from Pages Router global CSS restriction

[jantimon]

What?

Skip the Pages Router global CSS restriction for data: URL imports (similar to app router and mixed app/pages router)

Why?

data:text/css should work the same no matter if pages router, app router or mixed router usage

How?

the validation in crates/next-api/src/module_graph.rs already had a carve-out for node_modules. This adds the same for data URL modules.

fixes #89900

• Related issues linked using fixes #89900
• Tests added

[nextjs-bot]

Allow CI Workflow Run

• approve CI run for commit: 9b33081

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[codspeed-hq]

Merging this PR will not alter performance

✅ 17 untouched benchmarks
⏩ 3 skipped benchmarks¹

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_{Comparing jantimon:fix/css-data-url-pages-router (d9d4889) with canary (420b72b)²}

Footnotes

1. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on canary (872c01b) during the generation of this report, so 420b72b was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[nextjs-bot]

Tests Passed

[jantimon]

@timneutkens can we please rerun the pipeline?

[jantimon]

@timneutkens the pnpm windows issues seem to be unrelated - can we just try again or should i fix anything?

[jantimon]

@timneutkens ?

[jantimon]

thank you @timneutkens

this will allow us a lot to migrate our pages router app to turbopack

[timneutkens]

I'll push a new canary so that you can try it 🙏