[sxzz]

AI usage

• No AI was used in this PR.
• AI was used: Claude Code + Claude Opus 5.5
  • I have carefully reviewed the AI-generated content myself.

Description

Importing CSS from a dependency with ?inline (e.g. import css from 'jodit/es2021/jodit.css?inline') left the import external instead of embedding the stylesheet as a string. Two things caused it:

• DepsPlugin externalized it like any other import of a dependency. ?inline CSS is now skipped by the automatic externalization, since it has to be embedded.
• The CSS plugin stripped the query before this.resolve, so DepsPlugin saw a plain pkg/style.css. It now resolves the full id and normalizes the result to <path>?inline.

Explicit deps.neverBundle patterns still keep the import external.

Linked Issues

Closes #959

Additional context

Since the dependency's CSS is now bundled, projects that set deps.onlyBundle without listing that package will get the "not included in deps.onlyBundle" error for it.

[netlify]

✅ Deploy Preview for tsdown-main ready!

Name	Link
🔨 Latest commit	ab9a9e4
🔍 Latest deploy log	https://app.netlify.com/projects/tsdown-main/deploys/6ae19d0355adf78e50f8913a
😎 Deploy Preview	https://deploy-preview-1109--tsdown-main.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

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

[pkg-pr-new]

Open in StackBlitz

tsdown

pnpm add https://pkg.pr.new/rolldown/tsdown@1109 -D

npm i https://pkg.pr.new/rolldown/tsdown@1109 -D

yarn add https://pkg.pr.new/rolldown/tsdown@1109.tgz -D

create-tsdown

pnpm add https://pkg.pr.new/rolldown/tsdown/create-tsdown@1109 -D

npm i https://pkg.pr.new/rolldown/tsdown/create-tsdown@1109 -D

yarn add https://pkg.pr.new/rolldown/tsdown/create-tsdown@1109.tgz -D

@tsdown/css

pnpm add https://pkg.pr.new/rolldown/tsdown/@tsdown/css@1109 -D

npm i https://pkg.pr.new/rolldown/tsdown/@tsdown/css@1109 -D

yarn add https://pkg.pr.new/rolldown/tsdown/@tsdown/css@1109.tgz -D

@tsdown/exe

pnpm add https://pkg.pr.new/rolldown/tsdown/@tsdown/exe@1109 -D

npm i https://pkg.pr.new/rolldown/tsdown/@tsdown/exe@1109 -D

yarn add https://pkg.pr.new/rolldown/tsdown/@tsdown/exe@1109.tgz -D

tsdown-migrate

pnpm add https://pkg.pr.new/rolldown/tsdown/tsdown-migrate@1109 -D

npm i https://pkg.pr.new/rolldown/tsdown/tsdown-migrate@1109 -D

yarn add https://pkg.pr.new/rolldown/tsdown/tsdown-migrate@1109.tgz -D

commit: ab9a9e4

[Copilot]

🟢 Approval recommended

The dependency stylesheet inlining change has no active review issues.

No open issues 🎉

What changed in this PR

Fixes dependency stylesheet imports using ?inline so tsdown embeds their contents as strings rather than leaving external imports, addressing #959.

Changes:

• Bypasses automatic externalization for inline CSS while preserving explicit deps.neverBundle patterns.
• Preserves the query during CSS resolution and normalizes resolved inline IDs.
• Adds a dependency-import regression test and expected output snapshot.

File	Description
tests/​css.test.ts	Tests that dependency CSS is embedded without an external import.
tests/​__snapshots__/​css/​handle-css-inline-from-dependencies.snap.md	Records the expected embedded stylesheet output.
src/​features/​deps.ts	Exempts inline stylesheets from automatic externalization.
packages/​css/​src/​plugin.ts	Keeps the query during resolution and normalizes the inline ID.

_{Review effort: Balanced}