fix(lint): regression of the noUnknownPseudoElement rule

[siketyan]

Summary

Fixes #9081

There was a regression that the rule don't accept any pseudo elements anymore except :global and :local in CSS modules.

Test Plan

Added snapshot tests

Docs

N/A

[changeset-bot]

🦋 Changeset detected

Latest commit: 08c0eef

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages

Name	Type
@biomejs/biome	Patch
@biomejs/cli-win32-x64	Patch
@biomejs/cli-win32-arm64	Patch
@biomejs/cli-darwin-x64	Patch
@biomejs/cli-darwin-arm64	Patch
@biomejs/cli-linux-x64	Patch
@biomejs/cli-linux-arm64	Patch
@biomejs/cli-linux-x64-musl	Patch
@biomejs/cli-linux-arm64-musl	Patch
@biomejs/wasm-web	Patch
@biomejs/wasm-bundler	Patch
@biomejs/wasm-nodejs	Patch
@biomejs/backend-jsonrpc	Patch

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[coderabbitai]

Walkthrough

Adds a patch changelog entry for a fix addressing issue #9081: the noUnknownPseudoElement rule no longer reports false positives for known CSS module pseudo-elements. Refactors the CSS analyzer's early-return logic by consolidating checks so CSS modules only bypass validation for global and local pseudo-elements (and vendor-prefixed names are still allowed). Adds a CSS module test with :global/:local and ::after/::before cases to verify correct behaviour.

Suggested reviewers

• ematipico

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix(lint): regression of the noUnknownPseudoElement rule' clearly and concisely summarises the main fix—addressing a regression in the linting rule that was introduced in version 2.4.0.
Description check	✅ Passed	The description directly addresses the changeset by referencing issue #9081, explaining the regression affecting CSS Modules pseudo-elements, and outlining the test plan added.
Linked Issues check	✅ Passed	The code changes align with issue #9081 objectives. The rule logic now correctly accepts pseudo-elements in CSS Modules while still rejecting unknown ones, fixing the false positives on standard pseudo-elements like ::after.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to fixing the noUnknownPseudoElement regression: updating the rule logic, adding a changelog entry, and including test cases for CSS Modules.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/GH-9081

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In @.changeset/tame-pants-pay.md:
- Line 5: Update the changeset sentence to correct grammar and clearly state the
behavior: change "Fixed ... report" to "Fixed ... reports" and use past tense
for the action ("Fixed"). Then explicitly list which selectors are now accepted
by the rule to clarify behavior — reference the rule name noUnknownPseudoElement
and state that CSS module-scoped selectors such as :local(...), :global(...),
and module-generated class selectors (e.g., .foo or .foo___hash) are no longer
flagged; keep the description concise and use present tense when describing
Biome behavior.

[codspeed-hq]

Merging this PR will not alter performance

✅ 29 untouched benchmarks
⏩ 126 skipped benchmarks¹

---

_{Comparing fix/GH-9081 (08c0eef) with main (89d6384)}

Footnotes

1. 126 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. ↩

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In @.changeset/tame-pants-pay.md:
- Line 5: Update the changelog entry text in .changeset/tame-pants-pay.md to
hyphenate "pseudo-elements" (change the phrase "pseudo elements" to
"pseudo-elements") in the sentence referencing the noUnknownPseudoElement rule
so the compound term follows standard style; search for the substring
"noUnknownPseudoElement" or the sentence "noUnknownPseudoElement rule no longer
reports false positives for any known pseudo elements" and replace with the
hyphenated form.

[coderabbitai]

⚠️ Potential issue | 🟡 Minor

Hyphenate “pseudo-elements”.
It’s the standard compound form.

✏️ Proposed tweak

-Fixed [`#9081`](https://github.com/biomejs/biome/issues/9081): The `noUnknownPseudoElement` rule no longer reports false positives for any known pseudo elements in CSS modules. This was a regression introduced in v2.4.0.
+Fixed [`#9081`](https://github.com/biomejs/biome/issues/9081): The `noUnknownPseudoElement` rule no longer reports false positives for any known pseudo-elements in CSS modules. This was a regression introduced in v2.4.0.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	Fixed [#9081](https://github.com/biomejs/biome/issues/9081): The `noUnknownPseudoElement` rule no longer reports false positives for any known pseudo elements in CSS modules. This was a regression introduced in v2.4.0.
	Fixed [`#9081`](https://github.com/biomejs/biome/issues/9081): The `noUnknownPseudoElement` rule no longer reports false positives for any known pseudo-elements in CSS modules. This was a regression introduced in v2.4.0.

🧰 Tools

🪛 LanguageTool

[misspelling] ~5-~5: This word is normally spelled with a hyphen.
Context: ...r reports false positives for any known pseudo elements in CSS modules. This was a regression i...

(EN_COMPOUNDS_PSEUDO_ELEMENTS)

🤖 Prompt for AI Agents

In @.changeset/tame-pants-pay.md at line 5, Update the changelog entry text in
.changeset/tame-pants-pay.md to hyphenate "pseudo-elements" (change the phrase
"pseudo elements" to "pseudo-elements") in the sentence referencing the
noUnknownPseudoElement rule so the compound term follows standard style; search
for the substring "noUnknownPseudoElement" or the sentence
"noUnknownPseudoElement rule no longer reports false positives for any known
pseudo elements" and replace with the hyphenated form.