fix: correct importLoaders count for node target

[chenjiahan]

Summary

Related to #6553. The normal CSS rule having an incorrect importLoaders count when emitCss is disabled.

Related Links

• feat: apply CSS transformation for inlined CSS in Node bundles #6553 (comment)

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	ea03876
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/691349fa56b6970008f4211a
😎 Deploy Preview	https://deploy-preview-6554--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 64 (🔴 down 7 from production) Accessibility: 97 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[Copilot]

Pull Request Overview

This PR fixes the importLoaders count for the CSS loader when emitCss is disabled (e.g., for node target). When certain CSS loaders (lightningcss-loader and postcss-loader) are skipped for the normal CSS rule but still counted in importLoaders, the count needs to be corrected.

• Adds logic to decrement importLoaders for normal CSS rules when emitCss is disabled
• Updates test snapshots to reflect the corrected importLoaders value (from 1 to 0)

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
packages/core/src/plugins/css.ts	Adds conditional logic to decrement importLoaders by 1 when emitCss is disabled for normal CSS rules
packages/core/tests/snapshots/environments.test.ts.snap	Updates snapshot to reflect corrected importLoaders value
packages/core/tests/snapshots/default.test.ts.snap	Updates snapshot to reflect corrected importLoaders value
packages/core/tests/snapshots/css.test.ts.snap	Updates snapshot to reflect corrected importLoaders value

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.