All versions since 2.4.7

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:
```
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a {
2
  accent-color: bar;
3
}
```
#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.
```
1
// Invalid
2
import { foo } from "foo";
3
const bar = 1;
4
import { baz } from "baz"; // ← flagged
5

6
// Valid
7
import { foo } from "foo";
8
import { baz } from "baz";
9
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:

1
unicode-range: U+11???-2??;
2
unicode-range: U+11???-;

with diagnostics such as:

1
× Wildcard ranges cannot be combined with a range interval.
2
  > unicode-range: U+11???-2??;
3
                            ^
4

5
× Expected a codepoint but instead found ';'.
6
  > unicode-range: U+11???-;
7
                             ^

#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 Thanks @Netail! - Expanded the noNegationElse rule to cover the inequality & strict inequality operator.
#9353 2a29e0d Thanks @Conaclos! - Fixed #7583: organizeImports now sorts named specifiers inside bare exports and merges bare exports.
```
1
export { b, a };
2
export { c };
3
export { a, b, c };
```
Also, organizeImports now correctly adds a blank line between an import chunk and an export chunk.
```
1
import { A } from "package";
2

3
export { A };
```
#8658 bdcc934 Thanks @rksvc! - When the domains field is set in the configuration file, domains is now automatically enabled when Biome detects certain dependencies in package.json.
#9383 f5c8bf0 Thanks @ematipico! - Fixed #6606: The type inference engine now resolves Record<K, V> types, synthesizing them as object types with index signatures. This improves accuracy for type-aware lint rules such as noFloatingPromises, noMisusedPromises, useAwaitThenable, and useArraySortCompare when operating on Record-typed values.
#9359 701ddd3 Thanks @ematipico! - Fixed #7516: noUnusedImports no longer reports a false positive when a local variable shadows an imported type namespace that is still used in a type annotation.
#9473 50e93bd Thanks @ematipico! - Improved the detection of variables inside Astro files. Now the rule noUnusedVariables and others will trigger fewer false positives.
#9459 171b2ee Thanks @ematipico! - Fixed #9314. Now Biome doesn’t panic when useAriaPropsForRole is configured using an object.
#9465 c8918d6 Thanks @Netail! - Fixed #9464: Temporal is now correctly detected as a global.
#9367 722f0da Thanks @Netail! - Added the nursery rule noTopLevelLiterals. It requires the root-level value to be an array or object.

Invalid:
```
1
"just a string"
```
#9333 a294b89 Thanks @terror! - Fixed #9310. Now the HTML formatter doesn’t mangle elements that are followed by self-closing elements such as <br> or <img>.
#9391 4bffb66 Thanks @ematipico! - Slightly increased the performance of the CLI in projects that have more than ~2K files.
#9365 776cb64 Thanks @Netail! - Added the nursery rule noEmptyObjectKeys, which disallows the use of empty keys in JSON objects.

Invalid:
```
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{
2
  "": "value"
3
}
```

2.4.8 Latest

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.