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Biome CLI v2.4.10

30 Mar 16:11
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Biome CLI v2.4.10 Latest
Latest

2.4.10

Patch Changes

  • #8838 f3a6a6b Thanks @baeseokjae! - Added new lint nursery rule noImpliedEval.

    The rule detects implied eval() usage through functions like setTimeout, setInterval, and setImmediate when called with string arguments.

    // Invalid
setTimeout("alert('Hello');", 100);

// Valid
setTimeout(() => alert("Hello"), 100);

  • #9320 93c3b6c Thanks @taberoajorge! - Fixed #7664: noUnusedVariables no longer reports false positives for TypeScript namespace declarations that participate in declaration merging with an exported or used value declaration (const, function, or class) of the same name. The reverse direction is also handled: a value declaration merged with an exported namespace is no longer flagged.

  • #9630 1dd4a56 Thanks @raashish1601! - Fixed #9629: noNegationElse now keeps ternary branch comments attached to the correct branch when applying its fixer.

  • #9216 04243b0 Thanks @FrederickStempfle! - Fixed #9061: noProcessEnv now also detects process.env when process is imported from the "process" or "node:process" modules.

    Previously, only the global process object was flagged:

    import process from "node:process";
// This was not flagged, but now it is:
console.log(process.env.NODE_ENV);

  • #9692 61b7ec5 Thanks @mkosei! - Fixed Svelte #each destructuring parsing and formatting for nested patterns such as [key, { a, b }].

  • #9627 06a0f35 Thanks @ematipico! - Fixed #191: Improved the performance of how the Biome Language Server pulls code actions and diagnostics.

    Before, code actions were pulled and computed all at once in one request. This approach couldn't work in big files, and caused Biome to stale and have CPU usage spikes up to 100%.

    Now, code actions are pulled and computed lazily, and Biome won't choke anymore in big files.

  • #9643 5bfee36 Thanks @dyc3! - Fixed #9347: useVueValidVBind no longer reports valid object bindings like v-bind="props".

  • #9627 06a0f35 Thanks @ematipico! - Fixed assist diagnostics being invisible when using --diagnostic-level=error. Enforced assist violations (e.g. useSortedKeys) were filtered out before being promoted to errors, causing biome check to incorrectly return success.

  • #9695 9856a87 Thanks @dyc3! - Added the new nursery rule noUnsafePlusOperands, which reports + and += operations that use object-like, symbol, unknown, or never operands, or that mix number with bigint.

  • #9627 06a0f35 Thanks @ematipico! - Fixed duplicate parse errors in check and ci output. When a file had syntax errors, the same parse error was printed twice and the error count was inflated.

  • #9627 06a0f35 Thanks @ematipico! - Improved the performance of the commands lint and check when they are called with --write.

  • #9627 06a0f35 Thanks @ematipico! - Fixed --diagnostic-level not fully filtering diagnostics. Setting --diagnostic-level=error now correctly excludes warnings and infos from both the output and the summary counts.

  • #9623 13b3261 Thanks @ematipico! - Fixed #9258: --skip no longer causes suppressions/unused warnings for suppression comments targeting skipped rules or domains.

  • #9631 599dd04 Thanks @raashish1601! - Fixed #9625: experimentalEmbeddedSnippetsEnabled no longer crashes when a file mixes formatable CSS-in-JS templates with tagged templates that the embedded formatter can't currently delegate, such as a styled-components interpolation returning `css```.

What's Changed

  • feat(linter): add noImpliedEval rule by @baeseokjae in #8838
  • fix(linter): detect process.env when process is imported from module by @FrederickStempfle in #9216
  • fix(cli): skip with domains should not report by @ematipico in #9623
  • fix: avoid unresolved embedded CSS tag ranges by @raashish1601 in #9631
  • chore(deps): update dependency happy-dom to v20.8.8 [security] by @renovate[bot] in #9628
  • fix(cli): improve code actions filtering by @ematipico in #9627
  • fix(lint): preserve ternary branch comments in noNegationElse by @raashish1601 in #9630
  • fix(markdown-parser): incorrect inline link R_PAREN token range by @jfmcdowell in #9642
  • fix(useVueValidVBind): don't flag missing arguments by @dyc3 in #9643
  • chore(deps): update rust crate terminal_size to 0.4.4 by @raashish1601 in #9646
  • test(markdown-parser): add criterion benchmarks and CI workflow by @jfmcdowell in #9657
  • chore(deps): update dependency happy-dom to v20.8.9 [security] by @renovate[bot] in #9694
  • chore(Cargo.toml): clean up, compile insta in opt-level=3 by @Conaclos in #9698
  • fix(lint): handle namespace declaration merging in noUnusedVariables by @taberoajorge in #9320
  • feat(md/fmt): links, codeblocks by @ematipico in #9699
  • fix(html): support nested svelte each destructuring by @mkosei in #9692
  • feat(lint/js): add noUnsafePlusOperands by @dyc3 in #9695
  • chore(deps): update rust crate papaya to 0.2.4 by @renovate[bot] in #9707
  • chore(deps): update rust crate rustc-hash to 2.1.2 by @renovate[bot] in #9710
  • chore(deps): update rust crate boa_engine to 0.21.1 by @renovate[bot] in #9706
  • chore(deps): update dependency tombi to v0.9.8 by @renovate[bot] in #9705
  • chore(deps): update dependency rust to v1.94.1 by @renovate[bot] in #9704
  • chore(deps): update dependency dprint to v0.53.1 by @renovate[bot] in #9703
  • chore(deps): update rust crate quickcheck_macros to 1.2.0 by @renovate[bot] in #9601
  • chore: update sponsors by @ematipico in #9714
  • ci: release by @github-actions[bot] in #9622

New Contributors

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.9...@biomejs/biome@2.4.10

Contributors

jfmcdowell, ematipico, and 8 other contributors
Assets 10
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Biome CLI v2.4.9

25 Mar 12:38
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@biomejs/biome@2.4.9
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Biome CLI v2.4.9

2.4.9

Patch Changes

  • #9315 085d324 Thanks @ematipico! - Added a new nursery CSS rule noDuplicateSelectors, that disallows duplicate selector lists within the same at-rule context.

    For example, the following snippet triggers the rule because the second selector and the first selector are the same:

    /* First selector */
.x .y .z {
}

/* Second selector */
.x {
  .y {
    .z {
    }
  }
}

  • #9567 b7ab931 Thanks @ematipico! - Fixed #7211: useOptionalChain now detects negated logical OR chains. The following code is now considered invalid:

    !foo || !foo.bar;

  • #8670 607ebf9 Thanks @tt-a1i! - Fixed #8345: useAdjacentOverloadSignatures no longer reports false positives for static and instance methods with the same name. Static methods and instance methods are now treated as separate overload groups.

    class Kek {
  static kek(): number {
    return 0;
  }
  another(): string {
    return "";
  }
  kek(): number {
    return 1;
  } // no longer reported as non-adjacent
}

  • #9476 97b80a8 Thanks @masterkain! - Fixed #9475: Fixed a panic when Biome analyzed ambient TypeScript modules containing class constructor, getter, or setter signatures that reference local type aliases. Biome now handles these declarations without crashing during semantic analysis.

  • #9553 0cd5298 Thanks @dyc3! - Fixed a bug where enabling the rules of a whole group, would enable rules that belonged to a domain under the same group.

    For example, linter.rules.correctness = "error" no longer enables React- or Qwik-specific correctness rules unless linter.domains.react, linter.domains.qwik, or an explicit rule config also enables them, or their relative dependencies are installed.

  • #9586 4cafb71 Thanks @dyc3! - Fixed #8828: Grit patterns using export { $foo } from $source now match named re-exports in JavaScript and TypeScript files.

  • #9550 d4e3d6e Thanks @dyc3! - Fixed #9548: Biome now parses conditional expressions whose consequent is an arrow function returning a parenthesized object expression.

  • #8696 a7c19cc Thanks @Faizanq! - Fixed #8685 where noUselessLoneBlockStatements would remove empty blocks containing comments. The rule now preserves these blocks since comments may contain important information like TODOs or commented-out code.

  • #9557 6671ac5 Thanks @datalek! - Fixed #9557: Biome's LSP server no longer crashes on startup when used with editors that don't send workspaceFolders during initialization. This affected any LSP client that only sends rootUri, which is valid per the LSP specification.

  • #9455 1710cf1 Thanks @omar-y-abdi! - Fixed #9174: useExpect now correctly rejects asymmetric matchers in Vitest or Jest like expect.stringContaining(), expect.objectContaining(), and utilities like expect.extend() that are not valid assertions. Previously these constructs caused false negatives, allowing tests without real assertions to pass the lint rule.

  • #9584 956e367 Thanks @ematipico! - Fixed a bug where Vue directive attribute values like v-bind:class="{'dynamic': true}" were incorrectly parsed as JavaScript statements instead of expressions. Object literals inside directive values like :class, v-if, and v-html are now correctly parsed as expressions, preventing spurious parse errors.

  • #9474 e168494 Thanks @ematipico! - Added the new nursery rule noUntrustedLicenses. This rule disallows dependencies that ship with invalid licenses or licenses that don't meet the criteria of your project/organisation.

    The rule has the following options:

    • allow: a list of licenses that can be allowed. Useful to bypass possible invalid licenses from downstream dependencies.
    • deny: a list of licenses that should trigger the rule. Useful to deny licenses that don't fit your project/organisation.
      When both deny and allow are provided, deny takes precedence.
    • requireOsiApproved: whether the licenses need to be approved by the Open Source Initiative.
    • requireFsfLibre: whether the licenses need to be approved by the Free Software Foundation.

  • #9544 723798b Thanks @ViniciusDev26! - Added an unsafe fix to useConsistentMethodSignatures that automatically converts between method-style and property-style signatures.

  • #9555 8a3647b Thanks @ematipico! - Fixed #188: the Biome Language Server no longer panics when open files change abruptly, such as during git branch checkouts.

  • #9605 f65c637 Thanks @ematipico! - Fixed #9589. Now Biome correctly parses object expressions inside props and directives. The following code doesn't emit errors anymore:

    <style is:global define:vars={{ bgLight: light }}>
<Component name={{ first, name }} />

  • #9565 ccb249e Thanks @eyupcanakman! - Fixed #9505: noUselessStringConcat no longer reports tagged template literals as useless string concatenations. Tagged templates invoke a function and can return non-string values, so combining them with + is not equivalent to a single template literal.

  • #9534 4d050df Thanks @Netail! - Added the nursery rule noInlineStyles. The rule disallows the use of inline style attributes in HTML and the style prop in JSX, including React.createElement calls. Inline styles make code harder to maintain and can interfere with Content Security Policy.

  • #9611 cddaa44 Thanks @gaauwe! - Fixed a regression where Biome LSP could misread editor settings sent through workspace/didChangeConfiguration when the payload was wrapped in a top-level biome key. This caused requireConfiguration and related settings to be ignored in some editors.

What's Changed

  • fix(linter): differentiate static/instance methods in useAdjacentOverloadSignatures by @tt-a1i in #8670
  • fix(parse/js): fix a case where valid js was being interpretted as ts by @dyc3 in htt...
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Contributors

masterkain, jfmcdowell, and 12 other contributors
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Biome CLI v2.4.8

18 Mar 13:53
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@biomejs/biome@2.4.8
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Biome CLI v2.4.8

2.4.8

Patch Changes

  • #9488 bc709f6 Thanks @mvanhorn! - Fixed #9463: the "Biome found a configuration file outside of the current working directory" diagnostic now includes the configuration file path and the working directory, giving users actionable information to debug the issue.

  • #9527 2f8bf80 Thanks @mdm317! - Fixed #8959: Fixed TypeScript arrow function formatting when a comment appears after =>.

  • #9525 e7b3b10 Thanks @ViniciusDev26! - Added the rule noDrizzleUpdateWithoutWhere to prevent accidental full-table updates when using Drizzle ORM without a .where() clause.

  • #9531 1302740 Thanks @ematipico! - Fixed #9187: Astro frontmatter containing regex literals with quotes (/'/, /"/) or dashes (/---/) no longer causes parse errors.

  • #9535 b630d93 Thanks @leno23! - Fixed #9524: remove extra space before > when bracketSameLine is true and the self-closing slash is absent in HTML formatter.

  • #9537 81e6306 Thanks @ematipico! - Fixed #9238: The HTML parser no longer incorrectly reports --- inside element content (e.g. <td>---</td>) as an "Unexpected value or character" error.

  • #9532 4b64145 Thanks @ematipico! - Fixed #9117: biome check --write no longer falsely reports Svelte and Vue files as changed when html.formatter.indentScriptAndStyle is enabled and the files are already correctly formatted.

  • #9528 61451ef Thanks @ematipico! - Fixed #9341: Fixed an LSP crash that could corrupt file content when saving with format-on-save enabled.

  • #9538 794f79c Thanks @ematipico! - Fixed #9279: The rule noSubstr now detects .substr() and .substring() calls in all expression contexts, including variable declarations, function arguments, return statements, and arrow function bodies.

  • #9462 c23272c Thanks @ematipico! - Fixed #9370: The resolver now correctly prioritizes more specific exports patterns over less specific ones. Previously, a pattern like "./*" could match before "./features/*", causing resolution failures for packages with overlapping subpath patterns.

  • #9515 f85c069 Thanks @shivamtiwari3! - Fixed #9506 and #9479: Biome no longer reports false parse errors on <script type="speculationrules"> and <script type="application/ld+json"> tags. These script types contain non-JavaScript content and are now correctly skipped by the embedded language detector.

  • #9514 7fe43c8 Thanks @ematipico! - Fixed #6964: Biome now correctly resolves the .gitignore file relative to vcs.root when configured. Previously, the vcs.root setting was ignored and Biome always looked for the ignore file in the workspace directory.

  • #9521 af39936 Thanks @ematipico! - Fixed #9483. Now the rule noRedeclare doesn't panic when it encounters constructor overloads.

  • #9490 60cf024 Thanks @willfarrell! - Added support for modern CSS properties, pseudo-classes, and pseudo-elements.

    New known properties: dynamic-range-limit, overlay, reading-flow, reading-order, scroll-marker-group, scroll-target-group.

    New pseudo-elements: ::checkmark, ::column, ::picker, ::picker-icon, ::scroll-button, ::scroll-marker, ::scroll-marker-group.

    New pseudo-classes: :active-view-transition-type, :has-slotted, :target-after, :target-before, :target-current.

  • #9526 4d42823 Thanks @ematipico! - Fixed #9358 and #9375. Now attributes that have text expressions such as class={buttonClass()} are correctly tracked in Svelte files.

  • #9520 61f53ee Thanks @ematipico! - Fixed #9519. Now noUnusedVariables doesn't flag variables that are used as typeof type.

  • #9487 331dc0d Thanks @mvanhorn! - Fixed #9477: source.fixAll.biome no longer sorts imports when source.organizeImports.biome is disabled in editor settings. The organize imports action is now excluded from the fix-all pass unless explicitly requested.

  • #9525 e7b3b10 Thanks @ViniciusDev26! - Added the rule noDrizzleDeleteWithoutWhere to prevent accidental full-table deletes when using Drizzle ORM without a .where() clause.

What's Changed

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Contributors

mvanhorn, ematipico, and 10 other contributors
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Biome CLI v2.4.7

13 Mar 18:33
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Biome CLI v2.4.7

2.4.7

Patch Changes

  • #9318 3ac98eb Thanks @ematipico! - Added new nursery lint rule useBaseline for CSS. The rule reports when CSS properties, property values, at-rules, media conditions, functions, or pseudo-selectors are not part of the configured Baseline tier.

    For example, at the time of writing, the rule will trigger for the use of accent-color because it has limited availability:

    a {
  accent-color: bar;
}

  • #9272 2de8362 Thanks @terror! - Added the nursery rule useImportsFirst that enforces all import statements appear before any non-import statements in a module. Inspired by the eslint-plugin-import import/first rule.

    // Invalid
import { foo } from "foo";
const bar = 1;
import { baz } from "baz"; // ← flagged

// Valid
import { foo } from "foo";
import { baz } from "baz";
const bar = 1;

  • #9285 93ea495 Thanks @dyc3! - Fixed noUndeclaredVariables from erroneously flagging props only used in the template section in Vue SFCs

  • #9435 6c5a8f2 Thanks @siketyan! - Fixed #9432: Values referenced as a JSX element in Astro/Vue/Svelte templates are now correctly detected; noUnusedImports and useImportType rules no longer reports these values as false positives.

  • #9362 fc9ca4c Thanks @Netail! - Extra rule source references. biome migrate eslint should do a bit better detecting rules in your eslint configurations.

  • #9392 b881fea Thanks @g-ortuno! - Fixed biomejs/biome-vscode#959: LSP now correctly resolves project directory when configurationPath points to a configuration file outside the workspace.

  • #9420 a1c46af Thanks @ematipico! - Fixed #9385: noUselessEscapeInString no longer incorrectly flags valid CSS hex escapes (e.g. \e7bb) as useless. The rule now recognizes all hex digits (0-9, a-f, A-F) as valid escape characters in CSS strings.

  • #9416 f2581b8 Thanks @ematipico! - Fixed #9131, #9112, #9166: the formatter no longer crashes or produces corrupt output when a JS file with experimentalEmbeddedSnippetsEnabled contains non-embedded template literals alongside embedded ones (e.g. console.log(\test`)next tographql(`...`)`).

  • #9344 cb4d7d7 Thanks @ematipico! - Fixed #6921: noShadow no longer incorrectly flags destructured variable bindings in sibling scopes as shadowing. Object destructuring, array destructuring, nested patterns, and rest elements are now properly recognized as declarations.

  • #9360 bc5dd99 Thanks @ematipico! - Fixed #7125: The rule noShadow no longer incorrectly flags parameters in TypeScript constructor and method overload signatures.

  • #9371 29cac17 Thanks @ematipico! - Fixed #5279: Tabs in diagnostic diff output are now rendered at a consistent width across context and changed lines, fixing visual misalignment when source files use tab indentation.

  • #9043 61e2a02 Thanks @dyc3! - Fixed #8897: Biome now parses @utility names containing / when Tailwind directives are enabled.

  • #9354 930c858 Thanks @denbezrukov! - Improved CSS parser recovery for invalid unicode-range values that mix wildcard ranges with range intervals. For example, Biome now reports clearer diagnostics for invalid syntax like:

    unicode-range: U+11???-2??;
unicode-range: U+11???-;

    with diagnostics such as:

    × Wildcard ranges cannot be combined with a range interval.
  > unicode-range: U+11???-2??;
                            ^

× Expected a codepoint but instead found ';'.
  > unicode-range: U+11???-;
                             ^

  • #9355 78e74a2 Thanks @SchahinRohani! - Fixed #9349: Biome now correctly handles Vue dynamic :alt and v-bind:alt bindings in useAltText, preventing false positives in .vue files.

  • #9369 b309dde Thanks @costajohnt! - Fixed #9210: useAnchorContent no longer reports an accessibility error for Astro Image components inside links when they provide non-empty alt text.

  • #9345 70c2d4e Thanks @ematipico! - Fixed #7214: useOptionalChain now detects optional chain patterns that don't start at the beginning of a logical AND expression. For example, bar && foo && foo.length is now correctly flagged and fixed to bar && foo?.length.

  • #9311 78c4e9b Thanks @ruidosujeira! - Fixed #9245: the useSemanticElements rule no longer suggests <output> for role="status" and role="alert". The <output> element is only a relatedConcept of these roles, not a direct semantic equivalent. These roles are now excluded from suggestions, aligning with the intended behavior of the upstream prefer-tag-over-role rule.

  • #9363 b2ffb4a Thanks @ematipico! - Fixed #5212: useSemanticElements no longer reports a diagnostic when a semantic element already has its corresponding role attribute (e.g. <nav role="navigation">, <footer role="contentinfo">). These cases are now correctly left to noRedundantRoles.

  • #9364 1bb9edc Thanks @xvchris! - Fixed #9357. Improved the information emitted by some diagnostics.

  • #9434 bf12092 Thanks @siketyan! - Fixed #9433: noBlankTarget now correctly handles dynamic href attributes, such as <a href={company?.website} target="_blank">.

  • #9351 [5046d2b]...

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Contributors

jfmcdowell, ematipico, and 14 other contributors
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Biome CLI v2.4.6

05 Mar 14:47
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@biomejs/biome@2.4.6
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Biome CLI v2.4.6

2.4.6

Patch Changes

  • #9305 40869b5 Thanks @ematipico! - Fixed #4946: noUnreachable no longer reports code inside finally blocks as unreachable when there is a break, continue, or return in the corresponding try body.

  • #9303 464910c Thanks @ematipico! - Fixed #2786: The formatter no longer produces different output on subsequent runs when a case clause has a trailing line comment followed by a single block statement.

  • #9324 6294aa2 Thanks @arendjr! - Fixed #7730: useAnchorContent now recognises SolidJS's innerHTML the same way as React's dangerouslySetInnerHTML.

  • #9298 1003229 Thanks @Netail! - Fixed #9296, so comments are moved along with the attributes in the useSortedAttributes assist rule code fix.

  • #9329 855b451 Thanks @dyc3! - Improved performance of noEmptyBlockStatements. The rule is now smarter about short-circuiting its logic.

  • #9326 85dfe9b Thanks @dyc3! - Improved performance for noImportCycles by explicitly excluding node_modules from the cycle detection. The performance improvement is directly proportional to how big your dependency tree is.

  • #9323 d5ee469 Thanks @ematipico! - Fixed #9217 and biomejs/biome-vscode#959, where the Biome language server didn't correctly resolve the editor setting configurationPath when the provided value is a relative path.

  • #9302 86fbc70 Thanks @sepagian! - Fixed #9300: Lowercase component member expressions like <form.Field> in Svelte and Astro files are now correctly formatted.

    -<form .Field></form.Field>
+<form.Field></form.Field>

What's Changed

  • fix(js_analyze): move comments with useSortedAttributes action by @Netail in #9298
  • fix(formatter): switch case comments by @ematipico in #9303
  • refactor(markdown-parser): promote list structural tokens from skipped trivia to explicit CST nodes by @jfmcdowell in #9274
  • fix(noUnreachable): handle dead implicit jumps in finally by @ematipico in #9305
  • refactor(markdown-parser): align newline/prescan paragraph-break checks by @jfmcdowell in #9197
  • refactor(markdown-parser): promote blank lines between list items to MdNewline nodes by @jfmcdowell in #9313
  • fix(linter): support SolidJS's innerHTML in useAnchorContent by @arendjr in #9324
  • fix(lsp): correctly resolve configurationPath by @ematipico in #9323
  • perf(noImportCycles): exclude node_modules from cycle detection by @dyc3 in #9326
  • refactor(css_parser): split function parser into modules by @denbezrukov in #9325
  • refactor(markdown-parser): promote fenced code block skipped trivia to explicit CST nodes by @jfmcdowell in #9321
  • refactor(css): rename operator_token field to operator by @denbezrukov in #9327
  • perf: add .skip(1) to .ancestors() calls in a bunch of places by @dyc3 in #9330
  • perf(noEmptyBlockStatements): short circuit to avoid traversing descendants for comments by @dyc3 in #9329
  • fix: lowercase component member expressions in Astro/Svelte by @sepagian in #9302
  • chore: align parser options struct name by @Netail in #9332
  • feat(css): use ScssExpression in ScssNestingDeclaration and CssGenericProperty by @denbezrukov in #9328
  • refactor(css): align scss expression node variants by @denbezrukov in #9340
  • feat(css): use expression in page by @denbezrukov in #9342
  • ci: release by @github-actions[bot] in #9301

New Contributors

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.5...@biomejs/biome@2.4.6

Contributors

jfmcdowell, arendjr, and 5 other contributors
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Biome CLI v2.4.5

02 Mar 14:24
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@biomejs/biome@2.4.5
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Biome CLI v2.4.5

2.4.5

Patch Changes

  • #9185 e43e730 Thanks @dyc3! - Added the nursery rule useVueScopedStyles for Vue SFCs. This rule enforces that <style> blocks have the scoped attribute (or module for CSS Modules), preventing style leakage and conflicts between components.

  • #9184 49c8fde Thanks @chocky335! - Improved plugin performance by batching all plugins into a single syntax visitor with a kind-to-plugin lookup map, reducing per-node dispatch overhead from O(N) to O(1) where N is the number of plugins.

  • #9283 071c700 Thanks @dyc3! - Fixed noUndeclaredVariables erroneously flagging functions and variables defined in the <script setup> section of Vue SFCs.

  • #9221 4612133 Thanks @ematipico! - Fixed an issue where the JSON reporter didn't contain the duration of the command.

  • #9294 1805c8f Thanks @Netail! - Extra rule source reference. biome migrate eslint should do a bit better detecting rules in your eslint configurations.

  • #9178 101b3bb Thanks @Bertie690! - Fixed #9172 and #9168:
    Biome now considers more constructs as valid test assertions.

    Previously, assert, expectTypeOf and assertType
    were not recognized as valid assertions by Biome's linting rules, producing false positives in lint/nursery/useExpect and other similar rules.

    Now, these rules will no longer produce errors in test cases that used these constructs instead of expect:

    import { expectTypeOf, assert, assertType } from "vitest";

const myStr = "Hello from vitest!";
it("should be a string", () => {
  expectTypeOf(myStr).toBeString();
});
test("should still be a string", () => {
  assertType<string>(myStr);
});
it.todo("should still still be a string", () => {
  assert(typeof myStr === "string");
});

  • #9173 32dad2d Thanks @dyc3! - Added parsing support for Svelte's new comments-in-tags feature.

    The HTML parser will now accept JS style comments in tags in Svelte files.

    <button
  // single-line comment
  onclick={doTheThing}
>click me</button>

<div
  /* block comment */
  class="foo"
>text</div>

  • #8952 1d2ca15 Thanks @pkallos! - Added the nursery rule useNullishCoalescing. This rule suggests using the nullish coalescing operator (??) instead of logical OR (||) when the left operand may be nullish. This prevents bugs where falsy values like 0, '', or false are incorrectly treated as missing. Addresses #8043

    // Invalid
declare const x: string | null;
const value = x || "default";

// Valid
const value = x ?? "default";

  • #9243 1992a85 Thanks @Netail! - Fixed #7813: improved the diagnostic of the rule useExhaustiveDependencies. The diagnostic now shows the name of the variable to add to the dependency array.

  • #9063 3d0648f Thanks @taga3s! - Added the nursery rule noVueRefAsOperand. This rule disallows cases where a ref is used as an operand.

    The following code is now flagged:

    import { ref } from "vue";

const count = ref(0);
count++; // Should be: count.value++
    import { ref } from "vue";

const ok = ref(false);
if (ok) {
  // Should be: if (ok.value)
  //
}

  • #9273 f239e20 Thanks @denbezrukov! - Fixed #9253: parsing of @container scroll-state(...) queries.

    @container scroll-state(scrolled: bottom) {
}
@container scroll-state(stuck) {
}
@container scroll-state(not (stuck)) {
}
@container scroll-state((stuck) and (scrolled: bottom)) {
}
@container scroll-state((stuck) or (snapped: x)) {
}
@container main-layout scroll-state(not ((stuck) and (scrolled: bottom))) {
}

  • #9259 96939c0 Thanks @ematipico! - Fixed CSS formatter incorrectly collapsing selectors when a BOM (Byte Order Mark) character is present at the start of the file. The formatter now correctly preserves line breaks between comments and selectors in BOM-prefixed CSS files, matching Prettier's behavior.

  • #9251 59e33fb Thanks @ematipico! - Fixed #9249: The CSS formatter no longer incorrectly breaks ratio values (like 1 / -1) across lines when followed by comments.

  • #9284 ec3a17f Thanks @denbezrukov! - Fixed #9253: removed false-positive diagnostics for valid @container/@supports general-enclosed queries.

    @container scroll-state(scrolled: bottom) {
}
@supports foo(bar: baz) {
}

  • #9215 b2619a1 Thanks @FrederickStempfle! - Fixed #9189: biome ci in GitHub Actions now correctly disables colors so that ::error/::warning workflow commands are not wrapped in ANSI escape codes.

  • #9256 65ae4c1 Thanks @ematipico! - Fixed JSON reporter escaping of special characters in diagnostic messages. The JSON reporter now properly escapes double quotes, backslashes, and control characters in error messages and advice text, preventing invalid JSON output when diagnostics contain these characters.

  • #9223 5b9da81 Thanks @ematipico! - Fixed an issue where the JSON reporter didn't write output to a file when --reporter-file was specified. The output is now correctly written to the specified file instead of always going to stdout.

  • #9154 c487e54 Thanks @abossenbroek! - Fixed #9115: The noPlaywrightMissingAwait rule no longer produces false positives on jest-dom matchers like toBeVisible, toBeChecked, toHaveAttribute, etc. For matchers shared between Playwright and jest-dom, the rule now checks whether expect()'s argument is a Playwright locator or page object before flagging. Added semantic variable resolution so that extracted Playwright locators (e.g. const loc = page.locator('.item'); expect(loc).toBeVisible()) are still correctly flagged.

  • #9269 33e5cdf Thanks @dyc3! - Fixed a false positive where noUndeclaredVariables reported bindings from Vue <script setup> as undeclared when used in <template>.

    This change ensures embedded bindings collected from script snippets (like imports and defineModel results...

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Contributors

abossenbroek, jfmcdowell, and 19 other contributors
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Biome CLI v2.4.4

20 Feb 21:30
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@biomejs/biome@2.4.4
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Biome CLI v2.4.4

2.4.4

Patch Changes

  • #9150 6946835 Thanks @dyc3! - Fixed #9138: Astro files containing --- in HTML content (e.g., <h1>---Hi</h1>) are now parsed correctly, both when a frontmatter block is present and when there is no frontmatter at all.

  • #9150 aa6f837 Thanks @dyc3! - Fixed #9138: The HTML parser incorrectly failing to parse bracket characters ([ and ]) in text content (e.g. <div>[Foo]</div>).

  • #9151 c0d4b0c Thanks @dyc3! - Fixed parsing of Svelte directive keywords (use, style) when used as plain text content in HTML/Svelte files. Previously, <p>use JavaScript</p> or <p>style it</p> would incorrectly produce a bogus element instead of proper text content.

  • #9162 7f1e060 Thanks @dyc3! - Fixed #9161: The Vue parser now correctly handles colon attributes like xlink:href and xmlns:xlink by parsing them as single attributes instead of splitting them into separate tokens.

  • #9164 458211b Thanks @dyc3! - Fixed #9161: The noAssignInExpressions rule no longer flags assignments in Vue v-on directives (e.g., @click="counter += 1"). Assignments in event handlers are idiomatic Vue patterns and are now skipped by the rule.

What's Changed

  • chore(scss): cherry-picks by @denbezrukov in #9149
  • fix(parse/html): don't lex square brackets as special tokens in contexts where they don't mean anything by @dyc3 in #9150
  • refactor(parse/html): use token_set! instead of matches! for svelte keywords and directives helpers by @dyc3 in #9148
  • fix(parse/html): don't lex "use" as USE_KW when in html text content by @dyc3 in #9151
  • feat(css): enhance SCSS qualified name detection by @denbezrukov in #9159
  • chore(html): more html benchmarks by @dyc3 in #8153
  • fix(parse/html/vue): don't treat : as special token outside of vue directives by @dyc3 in #9162
  • feat(lint/vue): automatically ignore noAssignInExpressions for vue v-on directives by @dyc3 in #9164
  • ci: release by @github-actions[bot] in #9160

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.3...@biomejs/biome@2.4.4

Contributors

dyc3 and denbezrukov
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Biome CLI v2.4.3

19 Feb 19:24
@github-actions github-actions
@biomejs/biome@2.4.3
312b6db
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Biome CLI v2.4.3

2.4.3

Patch Changes

  • #9120 aa40fc2 Thanks @ematipico! - Fixed #9109, where the GitHub reporter wasn't correctly enabled when biome ci runs on GitHub Actions.

  • #9128 8ca3f7f Thanks @dyc3! - Fixed #9107: The HTML parser can now correctly parse Astro directives (client/set/class/is/server), which fixes the formatting for Astro directives.

  • #9124 f5b0e8d Thanks @ematipico! - Fixed #8882 and #9108: The Astro frontmatter lexer now correctly identifies the closing --- fence when the frontmatter contains multi-line block comments with quote characters, strings that mix quote types (e.g. "it's"), or escaped quote characters (e.g. "\").

  • #9142 3ca066b Thanks @THernandez03! - Fixed #9141: The noUnknownAttribute rule no longer reports closedby as an unknown attribute on <dialog> elements.

  • #9126 792013e Thanks @ematipico! - Added missing Mocha globals to the Test domain: context, run, setup, specify, suite, suiteSetup, suiteTeardown, teardown, xcontext, xdescribe, xit, and xspecify. These are injected by Mocha's BDD and TDD interfaces and were previously flagged as undeclared variables in projects using Mocha.

  • #8855 6918c9e Thanks @ruidosujeira! - Fixed #8840. Now the Biome CSS parser correctly parses not + scroll-state inside @container queries.

  • #9111 4fb55cf Thanks @Jayllyz! - Slightly improved performance of noIrregularWhitespace by adding early return optimization and simplifying character detection logic.

  • #8975 086a0c5 Thanks @FrankFMY! - Fixed #8478: useDestructuring no longer suggests destructuring when the variable has a type annotation, like const foo: string = object.foo.

What's Changed

New Contributors

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.2...@biomejs/biome@2.4.3

Contributors

container, ematipico, and 5 other contributors
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Biome CLI v2.4.2

16 Feb 23:25
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@biomejs/biome@2.4.2
b99e7db
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Biome CLI v2.4.2

2.4.2

Patch Changes

What's Changed

  • fix(lint): don't report Props interface as unused in Astro files by @siketyan in #9101
  • fix(service): parse text expressions in svelte control flow blocks by @dyc3 in #9103
  • feat(migrate): more metadata for rules from html-eslint by @dyc3 in #9106
  • feat(lint): add Playwright ESLint rules by @abossenbroek in #8960
  • ci: release by @github-actions[bot] in #9104

New Contributors

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.1...@biomejs/biome@2.4.2

Contributors

abossenbroek, dyc3, and siketyan
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Biome CLI v2.4.1

16 Feb 15:58
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@biomejs/biome@2.4.1
5153f2f
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Biome CLI v2.4.1

2.4.1

Patch Changes

  • #9092 6edd600 Thanks @ematipico! - Fixed #9052. This PR reverts changes introduced by #8519, which caused unwanted changes on how paths are resolved.

  • #9091 3bf674d Thanks @ematipico! - Fixed #9090, where SCSS files were incorrectly processed by Biome. This was a regressions caused by the latest developments for supporting SCSS out of the box.

  • #9100 66931a8 Thanks @siketyan! - Fixed #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.

  • #9102 d01b903 Thanks @ematipico! - Fixed #9095, where Biome didn't print anything in stdin mode. This was a regression caused by a recent, internal refactor.

What's Changed

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.4.0...@biomejs/biome@2.4.1

Contributors

ematipico, renovate, and 2 other contributors
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