fix(parse/css/tailwind): make @custom-variant accept selector lists#8041
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fix(parse/css/tailwind): make @custom-variant accept selector lists#8041
@custom-variant accept selector lists#8041Conversation
🦋 Changeset detectedLatest commit: 53ddb17 The changes in this PR will be included in the next version bump. This PR includes changesets to release 13 packages
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Parser conformance results onjs/262
jsx/babel
symbols/microsoft
ts/babel
ts/microsoft
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WalkthroughThis change updates the Tailwind-related CSS parsing to accept a list of selectors in Suggested labels
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Pre-merge checks and finishing touches❌ Failed checks (1 warning)
✅ Passed checks (2 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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✅ Files skipped from review due to trivial changes (1)
🚧 Files skipped from review as they are similar to previous changes (2)
🧰 Additional context used🧠 Learnings (1)📚 Learning: 2025-10-15T09:24:31.042ZApplied to files:
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⛔ Files ignored due to path filters (8)
crates/biome_css_factory/src/generated/node_factory.rsis excluded by!**/generated/**,!**/generated/**and included by**crates/biome_css_factory/src/generated/syntax_factory.rsis excluded by!**/generated/**,!**/generated/**and included by**crates/biome_css_parser/tests/css_test_suite/ok/tailwind/custom-variants/dark.css.snapis excluded by!**/*.snapand included by**crates/biome_css_parser/tests/css_test_suite/ok/tailwind/custom-variants/shorthand-multiple-selectors.css.snapis excluded by!**/*.snapand included by**crates/biome_css_parser/tests/css_test_suite/ok/tailwind/custom-variants/shorthand.css.snapis excluded by!**/*.snapand included by**crates/biome_css_parser/tests/css_test_suite/ok/tailwind/shadcn-default.css.snapis excluded by!**/*.snapand included by**crates/biome_css_syntax/src/generated/nodes.rsis excluded by!**/generated/**,!**/generated/**and included by**crates/biome_css_syntax/src/generated/nodes_mut.rsis excluded by!**/generated/**,!**/generated/**and included by**
📒 Files selected for processing (4)
.changeset/stale-windows-strive.md(1 hunks)crates/biome_css_parser/src/syntax/at_rule/tailwind.rs(2 hunks)crates/biome_css_parser/tests/css_test_suite/ok/tailwind/custom-variants/shorthand-multiple-selectors.css(1 hunks)xtask/codegen/css.ungram(1 hunks)
🧰 Additional context used
🧠 Learnings (6)
📚 Learning: 2025-10-15T09:24:31.042Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_parser/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:24:31.042Z
Learning: Applies to crates/biome_parser/xtask/codegen/*.ungram : Unions of nodes must start with Any* (e.g., AnyHtmlAttribute)
Applied to files:
xtask/codegen/css.ungram
📚 Learning: 2025-10-15T09:22:15.851Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_formatter/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:22:15.851Z
Learning: Applies to crates/biome_formatter/src/lib.rs : Implement FormatLanguage for HtmlFormatLanguage with associated types: SyntaxLanguage=HtmlLanguage, Context=HtmlFormatContext, FormatRule=FormatHtmlSyntaxNode
Applied to files:
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs
📚 Learning: 2025-10-15T09:22:15.851Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_formatter/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:22:15.851Z
Learning: Applies to crates/biome_formatter/src/cst.rs : Create FormatHtmlSyntaxNode in cst.rs implementing FormatRule<HtmlSyntaxNode> and AsFormat/IntoFormat for HtmlSyntaxNode using the provided plumbing
Applied to files:
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs
📚 Learning: 2025-10-15T09:24:31.042Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_parser/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:24:31.042Z
Learning: Parse rules should return ParsedSyntax; return Absent without consuming tokens when the node cannot be predicted
Applied to files:
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs
📚 Learning: 2025-10-15T09:24:31.042Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_parser/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:24:31.042Z
Learning: Applies to crates/biome_parser/xtask/codegen/*.ungram : Nodes for enclosing syntax errors must include the Bogus word (e.g., HtmlBogusAttribute)
Applied to files:
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs
📚 Learning: 2025-10-15T09:24:31.042Z
Learnt from: CR
Repo: biomejs/biome PR: 0
File: crates/biome_parser/CONTRIBUTING.md:0-0
Timestamp: 2025-10-15T09:24:31.042Z
Learning: Use p.eat for optional tokens, p.expect for required tokens; use .ok() for optional nodes and .or_add_diagnostic(...) for required nodes
Applied to files:
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs
🧬 Code graph analysis (1)
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs (3)
crates/biome_css_syntax/src/generated/nodes.rs (27)
syntax(9888-9890)syntax(9936-9938)syntax(9985-9987)syntax(10032-10034)syntax(10083-10085)syntax(10139-10141)syntax(10191-10193)syntax(10246-10248)syntax(10301-10303)syntax(10349-10351)syntax(10400-10402)syntax(10452-10454)syntax(10501-10503)syntax(10549-10551)syntax(10601-10603)syntax(10652-10654)selector(2464-2466)selector(2539-2541)selector(3766-3768)selector(4021-4023)selector(4271-4273)selector(4371-4373)selector(4899-4901)selector(5400-5402)selector(6000-6002)selector(7002-7004)selector(7045-7047)crates/biome_css_parser/src/syntax/parse_error.rs (3)
expected_identifier(9-11)expected_string(50-52)expected_tw_source(243-245)crates/biome_css_parser/src/syntax/mod.rs (1)
parse_regular_identifier(433-435)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (7)
- GitHub Check: Lint project (depot-windows-2022)
- GitHub Check: Test (depot-windows-2022-16)
- GitHub Check: Check Dependencies
- GitHub Check: Test Node.js API
- GitHub Check: Bench (biome_css_analyze)
- GitHub Check: Bench (biome_css_formatter)
- GitHub Check: Bench (biome_css_parser)
🔇 Additional comments (5)
.changeset/stale-windows-strive.md (1)
1-9: LGTM! Clear documentation.The changelog entry accurately describes the new functionality with a helpful example.
xtask/codegen/css.ungram (1)
1935-1939: Correct alignment with list-based parsing.The change from
AnyCssSelectortoCssSelectorListproperly reflects the new support for multiple selectors in shorthand syntax.crates/biome_css_parser/tests/css_test_suite/ok/tailwind/custom-variants/shorthand-multiple-selectors.css (1)
1-3: Good test coverage.The test cases appropriately exercise both simple selectors and complex pseudo-class expressions with nesting, validating the new list-based parsing.
crates/biome_css_parser/src/syntax/at_rule/tailwind.rs (2)
6-11: Imports correctly updated.The changes properly replace single-selector parsing with list-based parsing by importing
SelectorListandParseSeparatedListwhilst removing the unusedexpected_selector.
126-142: List-based parsing correctly implemented.The shorthand parser now constructs a
SelectorListwith appropriate end and recovery tokens, properly handling comma-separated selectors within parentheses.
CodSpeed Performance ReportMerging #8041 will not alter performanceComparing Summary
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ematipico
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…biomejs#8041) <!-- IMPORTANT!! If you generated this PR with the help of any AI assistance, please disclose it in the PR. https://github.com/biomejs/biome/blob/main/CONTRIBUTING.md#ai-assistance-notice --> <!-- Thanks for submitting a Pull Request! We appreciate you spending the time to work on these changes. Please provide enough information so that others can review your PR. Once created, your PR will be automatically labeled according to changed files. Learn more about contributing: https://github.com/biomejs/biome/blob/main/CONTRIBUTING.md --> ## Summary <!-- Explain the **motivation** for making this change. What existing problem does the pull request solve?--> This simply expands what `@custom-variant` accepts to be a selector list instead of a single selector. <!-- Link any relevant issues if necessary or include a transcript of any Discord discussion. --> related to biomejs#7964 (comment) <!-- If you create a user-facing change, please write a changeset: https://github.com/biomejs/biome/blob/main/CONTRIBUTING.md#writing-a-changeset (your changeset is often a good starting point for this summary as well) --> ## Test Plan <!-- What demonstrates that your implementation is correct? --> Added tests, CI should be green ## Docs <!-- If you're submitting a new rule or action (or an option for them), the documentation is part of the code. Make sure rules and actions have example usages, and that all options are documented. --> <!-- For other features, please submit a documentation PR to the `next` branch of our website: https://github.com/biomejs/website/. Link the PR here once it's ready. -->
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Summary
This simply expands what
@custom-variantaccepts to be a selector list instead of a single selector.related to #7964 (comment)
Test Plan
Added tests, CI should be green
Docs