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#10595f458028 Thanks @pkallos! - Added the option ignoreBooleanCoercion to useNullishCoalescing. When enabled, Biome ignores || and ||= used inside a Boolean() call, where coalescing on falsy values is intentional.
#107984a32b63 Thanks @pkallos! - Added the option ignorePrimitives to useNullishCoalescing. When enabled, Biome ignores ||, ||=, and ternary expressions whose non-nullish operands are all primitives the option opts out of. Use true to ignore all primitives, or an object selecting string, number, boolean, or bigint.
#10796f1b3ab2 Thanks @ematipico! - Fixed #10768. Improved the performance of the Biome Language Server by cancelling certain in-flight operations when there are fast updates.
#10719aa649b5 Thanks @minseong0324! - Fixed noMisleadingReturnType false positive on returns that use a widening type assertion: "a" as string is no longer reported as misleading. The rule now also reports a literal-pinning assertion such as false as false, matching the existing as const behavior.
// No longer flagged (returns are `string`):functiongetValue(b: boolean): string{if(b)return"a"asstring;return"b"asstring;}// Now also reported, like `as const` (returns `false`):functionisReady(): boolean{returnfalseasfalse;}
#106788f073a7 Thanks @PranavAchar01! - Fixed #7718: Biome now correctly parses CSS nesting selectors when & appears as a trailing sub-selector after a type selector, e.g. h1& { color: red; }.
#107565ec965a Thanks @denbezrukov! - Fixed CSS formatter output for selector lists with allowWrongLineComments and // comments after a selector comma. Biome now keeps the selector before the line comment inline instead of breaking it across descendant combinators.
#107576232fcd Thanks @PranavAchar01! - Fixed #8269: the CSS parser now accepts Tailwind @variant and @utility names that start with a digit, such as the 2xl breakpoint.
#10777575ced6 Thanks @WaterWhisperer! - Fixed an issue reported in #10708: the GitLab reporter now handles --verbose diagnostics filtering correctly.
#102810efe244 Thanks @Zelys-DFKH! - Fixed a bug where GritQL patterns rejected positional (unkeyed) arguments.
#10758e36fd8a Thanks @henrybrewer00-dotcom! - Fixed #10697: The formatter no longer removes the parentheses around an await or yield expression used as the target of a TypeScript instantiation expression. For example, (await makeFactory)<Value> is no longer reformatted to await makeFactory<Value>, which would change the meaning of the code.
#105863617094 Thanks @IxxyDev! - Fixed #9568: noFloatingPromises no longer reports a false positive when calling an overloaded function and the selected overload does not return a promise.
functionbestEffort(cb: ()=>Promise<number>): Promise<number>;functionbestEffort(cb: ()=>number): number;functionbestEffort(cb: ()=>number|Promise<number>,): Promise<number>|number{returncb()asPromise<number>|number;}// This resolves to the second overload, which returns `number`, so it is no// longer flagged as a floating promise.bestEffort(()=>42);
#10680771daa4 Thanks @WaterWhisperer! - Fixed #10635: Biome now recognizes chained
table tests such as test.concurrent.each() and it.concurrent.each() as test calls, fixing noMisplacedAssertion false positives and improving formatting for those test declarations.
#1075934570b5 Thanks @henrybrewer00-dotcom! - Fixed #10636: noStaticElementInteractions no longer reports a false positive for event handlers on Svelte special elements such as <svelte:window>, <svelte:document>, and <svelte:body>. These are not real DOM elements, so they are now ignored by the rule.
#10741bd2364e Thanks @JamBalaya56562! - Fixed #6686: the rage command now respects the --config-path option and the BIOME_CONFIG_PATH environment variable when loading the Biome configuration. Previously it always used the default configuration resolution and reported the configuration as Not set when no biome.json existed in the working directory.
#10606a4cc4ab Thanks @Mokto! - Fixed false positives in noUnusedImports, noUnusedVariables, and useImportType for Svelte components that use both a <script module> and a <script> block. The two blocks compile to a single module and share a top-level scope, so a binding (import, function, or variable) declared in one block and used only in the other is no longer reported as unused.
#1076736d5aa7 Thanks @otkrickey! - Fixed #10754: useVueValidVBind no longer reports the Vue 3.4+ same-name shorthand as missing a value. :foo and v-bind:foo are now accepted as equivalent to :foo="foo", while v-bind, v-bind:[dynamicArg], and :[dynamicArg] without a value continue to be reported.
#10807d97fffe Thanks @ematipico! - Fixed an issue where .scss files were incorrectly analyzed when running biome check.
#1067253c6efc Thanks @ematipico! - Fixed a bug where Biome incorrectly formatted snippets that have parsing errors.
#10719aa649b5 Thanks @minseong0324! - Fixed useAwaitThenable false positive when awaiting a custom thenable that is not the global Promise. A value with a callable then member is now recognized as awaitable.
#10770dd1429c Thanks @ematipico! - Improved the Biome Language Server DX by orchestrating certain operations, so that they won't block the editor during typing. This improvement is more visible in large documents.
#10473d9b5133 Thanks @Mokto! - Improved noUnusedImports, noUnusedVariables, noUnusedFunctionParameters, and useImportType for Svelte, Vue, and Astro files (with html.experimentalFullSupportEnabled). Bindings used only in the template — including component tags, attribute interpolations, directives, bind: shorthand, and snippet parameters — are no longer reported as unused, while genuinely unused ones still are.
#10796f1b3ab2 Thanks @ematipico! - Fixed an issue where the Biome Language Server didn't enable project or type-aware lint rules, even when they were explicitly enabled.
#10774bde945b Thanks @pattrickrice! - Fixed #10268 where a race condition resulted in internal errors such as: The file biome.json does not exist in the workspace.
#107389fdc560 Thanks @JamBalaya56562! - Fixed #9899: the json and json-pretty reporters now escape backslashes in a diagnostic's location.path. Previously, paths containing backslashes (such as Windows-style paths) were emitted unescaped, producing invalid JSON.
#106265f837df Thanks @tom-groves! - Fixed #10625: biome migrate no longer emits an invalid trailing comma when a renamed rule (such as noConsoleLog → noConsole) is the last member of its rule group. Previously this produced malformed output that aborted the migration of a strict-JSON biome.json with a parsing error.
#10535c245f9d Thanks @Mokto! - Fixed a false positive in noUnusedVariables for Svelte files where variables referenced inside {@​html expr} blocks were incorrectly reported as unused.
#10689844b1be Thanks @ematipico! - Fixed #10658. The issue was caused by the "Go-to definition" editor feature, which was enabled by default. The feature is now disabled by default. To work, the feature triggers the scanner to build the module graph. This caused memory leak issues in cases where Biome starts in the home directory to modify files.
If you relied on this new feature, you must now turn on using the [editor settings] of the extension e.g. Zed and VSCode.
#10695043fbb5 Thanks @ematipico! - Fixed #10674. Biome now throws an error when the field level is missing from a rule option.
#1061523814f1 Thanks @qwertycxz! - Improved the DX the JSON schema when it's used by certain code editors like VSCode.
#10688ec69489 Thanks @ematipico! - Fixed a bug where the Biome Daemon did not correctly shut down when the editor was closed during an in-progress operation, especially while scanning.
#107016c2e0d7 Thanks @ematipico! - Fixed #10694. The Biome Language Server no longer prints an error when the user hovers a variable imported from node_modules.
#102203694a13 Thanks @theBGuy! - Fixed useAnchorContent false positive for <a> elements used as render prop values (e.g. render={<a href="..." />}), a pattern where the receiving component renders its children inside the anchor element.
#1070298823fb Thanks @ematipico! - Fixed #10612. The Biome parser now correctly parses processing instructions. The following SVG doesn't throw errors anymore:
#9539f0615fd Thanks @ematipico! - Added a new reporter called concise. When --reporter=concise is passed the commands format, lint, check and ci, the diagnostics are printed in a compact manner:
! index.ts:2:10: lint/correctness/noUnusedImports: Several of these imports are unused.
! main.ts:9:7: lint/correctness/noUnusedVariables: This variable f is unused.
× index.ts:8:5: lint/suspicious/noImplicitAnyLet: This variable implicitly has the any type.
× main.ts:2:10: lint/suspicious/noRedeclare: Shouldn't redeclare 'z'. Consider to delete it or rename it.
#94952056b23 Thanks @aviraldua93! - Added the useKeyWithClickEvents a11y lint rule for HTML files (.html, .vue, .svelte, .astro). This is a port of the existing JSX rule. The rule enforces that elements with an onclick handler also have at least one keyboard event handler (onkeydown, onkeyup, or onkeypress) to ensure keyboard accessibility.
Inherently keyboard-accessible elements (<a>, <button>, <input>, <select>, <textarea>, <option>) are excluded, as are elements hidden from assistive technologies (aria-hidden) or with role="presentation" / role="none".
<!-- Invalid: no keyboard handler --><divonclick="handleClick()">Click me</div><!-- Valid: has keyboard handler --><divonclick="handleClick()" onkeydown="handleKeyDown()">Click me</div><!-- Valid: inherently keyboard-accessible --><buttononclick="handleClick()">Submit</button>
#91529ec8500 Thanks @ematipico! - Added new nursery lint rule noUndeclaredClasses for HTML, JSX, and SFC files (Vue, Astro, Svelte). The rule detects CSS class names used in class="..." (or className) attributes that are not defined in any <style> block or linked stylesheet reachable from the file.
<!-- .typo is used but never defined --><html><head><style>
.button {
color: blue;
}
</style></head><body><divclass="button typo"></div></body></html>
#91529ec8500 Thanks @ematipico! - Added new nursery lint rule noUnusedClasses for CSS. The rule detects CSS class selectors that are never referenced in any HTML or JSX file that imports the stylesheet. This is a project-domain rule that requires the module graph.
/* styles.css — .ghost is never used in any importing file */
.button {
color: blue;
}
.ghost {
color: red;
}
#95466567efa Thanks @nhedger! - Added a biome upgrade command for standalone installations. It upgrades Homebrew installs with brew upgrade biome, updates manually installed binaries from the latest GitHub release, and tells npm users to upgrade with their package manager instead.
#9716701767a Thanks @faizkhairi! - Added the HTML version of the useHeadingContent rule. The rule now enforces that heading elements (h1-h6) have content accessible to screen readers in HTML, Vue, Svelte, and Astro files.
<!-- Invalid: empty heading --><h1></h1><!-- Invalid: heading hidden from screen readers --><h1aria-hidden="true">invisible content</h1><!-- Valid: heading with text content --><h1>heading</h1><!-- Valid: heading with accessible name --><h1aria-label="Screen reader content"></h1>
#9582f437ef8 Thanks @rahuld109! - Added the HTML version of the useKeyWithMouseEvents rule. The rule now enforces that onmouseover is accompanied by onfocus and onmouseout is accompanied by onblur in HTML, Vue, Svelte, and Astro files.
<!-- Invalid: onmouseover without onfocus --><divonmouseover="handleMouseOver()"></div><!-- Valid: onmouseover paired with onfocus --><divonmouseover="handleMouseOver()" onfocus="handleFocus()"></div>
#92751fdbcee Thanks @ff1451! - Added the new assist action useSortedTypeFields, which sorts the fields of GraphQL object types, interface types and input object types alphabetically, e.g. name, age, id becomes age, id, name.
#1056178075b7 Thanks @Conaclos! - Added a new style option to useExportType,
which enforces a style for exporting types.
This is the same option as the one provided by useImportType.
#8987d16e32b Thanks @DerTimonius! - Ported the useValidAnchor rule to HTML. This rule enforces that all anchors are valid and that they are navigable elements.
#100690eb9310 Thanks @Netail! - Added the HTML lint rule noStaticElementInteractions, which enforces that static, visible elements (such as <div>) that have click handlers use the valid role attribute.
With the option enabled, the following example is considered valid and is ignored by the rule:
consttruthy=!!value;
#9700894f3fb Thanks @ematipico! - The Biome Language server now supports the "go-to definition" feature.
When the cursor of the mouse is hovering an entity (variable, CSS class, type, etc.), and the command CTRL + click is triggered, the editor jumps to where this entity is defined, if the language server can find it.
Here's what Biome is able to resolve:
Variables and types used in JavaScript modules, defined in the same file or imported from another module.
JSX Components used in JavaScript modules, defined in the same file or imported from another module.
CSS classes used in JSX and HTML-ish files (Vue, Svelte and Astro), and defined in CSS files.
Components used in HTML-ish files and defined in other HTML-ish.
Variables used in HTML-ish files and defined in the same file or imported from another module (JavaScript or HTML-ish).
#93662ca1117 Thanks @dyc3! - Added the html.parser.vue configuration option. When enabled, it adds support for the parsing of Vue in .html files. Most Vue users don't need to enable this option since Vue files typically use the .vue extension, but it can be useful for projects that embed Vue syntax in regular HTML files.
#907374b20ee Thanks @chocky335! - Added support for applying GritQL plugin rewrites as code actions. GritQL plugins that use the rewrite operator (=>) now produce fixable diagnostics for JavaScript, CSS, and JSON files. By default, plugin rewrites are treated as unsafe fixes and require --write --unsafe to apply. Plugin authors can pass fix_kind = "safe" to register_diagnostic() to mark a fix as safe, allowing it to be applied with just --write.
Example plugin (useConsoleInfo.grit):
language js
`console.log($msg)` as $call where {
register_diagnostic(span = $call, message = "Use console.info instead of console.log.", severity = "warn", fix_kind = "safe"),
$call => `console.info($msg)`
}
Running biome check --write applies safe rewrites. Unsafe rewrites (the default, or fix_kind = "unsafe") still require --write --unsafe.
#9384f4c9edc Thanks @Conaclos! - Added the sortBareImports option to organizeImports,
which allows bare imports to be sorted within other imports when set to false.
- import "b";
import "a";
+ import "b";
import { A } from "a";
+ import "./file";
import { Local } from "./file";
- import "./file";
#8731e7872bf Thanks @siketyan! - Added the watch mode (--watch) to the CLI for check/format/lint commands. By enabling this option, Biome will re-run the check automatically when any file in the workspace has changed after the first run.
#9967e9b6c17 Thanks @dyc3! - Added HTML support for noExcessiveLinesPerFile. Biome now reports HTML files that exceed the configured line limit, including when skipBlankLines is enabled.
#9491b3eb63c Thanks @IxxyDev! - Added the HTML lint rule noAriaUnsupportedElements. This rule enforces that elements that do not support ARIA roles, states, and properties (meta, html, script, style) do not have role or aria-* attributes.
<!-- Invalid: meta does not support aria attributes --><metacharset="UTF-8" role="meta" />
#9306afd57a6 Thanks @viraxslot! - Added the noNoninteractiveTabindex lint rule for HTML. This rule enforces that tabindex is not used on non-interactive elements, as it can cause usability issues for keyboard users.
#92766d041d9 Thanks @IxxyDev! - Added the HTML lint rule noRedundantRoles. This rule enforces that explicit role attributes are not the same as the implicit/default role of an HTML element. It supports HTML, Vue, Svelte, and Astro files.
<!-- Invalid: role="button" is redundant on <button> --><buttonrole="button"></button>
#981369aadc2 Thanks @ematipico! - Added a new linter configuration called preset. With the new option, users can enable different kinds of rules at once.
The following presets are available:
"recommended": it enables all Biome-recommended rules, or recommended rules of a group;
"all": it enables all Biome rules, or enables all rules of a group;
"none": it disables all Biome rules, or disable all rules of a group.
#839613785fc Thanks @apple-yagi! - Biome now supports pnpm catalogs (default and named) when resolving dependencies for linting. This behavior is opt-in and requires setting javascript.resolver.experimentalPnpmCatalogs to true.
#9853816302f Thanks @Netail! - Added the new assist action useSortedSelectionSet, which sorts GraphQL selection sets alphabetically, e.g. name, age, id becomes age, id, name.
Invalid:
query {
nameageid
}
#100749c7c6eb Thanks @georgephillips! - Added a kind field to the ImportMatcher used by the organizeImports assist action. The new field selects imports by their syntactic kind and currently supports bare (matching side-effect imports such as import "polyfill") with optional ! negation (!bare). The matcher composes with the existing type and source fields, so users can express patterns such as "only bare imports that import a CSS file" ({ "kind": "bare", "source": "**/*.css" }).
#9171ce65710 Thanks @chocky335! - Added includes option for plugin file scoping. Plugins can now be configured with glob patterns to restrict which files they run on. Use negated globs for exclusions.
#94961dfb829 Thanks @aviraldua93! - Added HTML support for the noAriaHiddenOnFocusable accessibility lint rule, which enforces that aria-hidden="true" is not set on focusable elements. Focusable elements include native interactive elements (<button>, <input>, <select>, <textarea>), elements with href (<a>, <area>), elements with tabindex >= 0, and editing hosts (contenteditable). Includes an unsafe fix to remove the aria-hidden attribute.
<!-- Invalid: aria-hidden on a focusable element --><buttonaria-hidden="true">Submit</button><!-- Valid: aria-hidden on a non-focusable element --><divaria-hidden="true">decorative content</div>
#9761cbbb7d5 Thanks @Maximiliano-Zeballos! - Ported the useValidAriaProps lint rule to HTML. This rule checks that all aria-* attributes used in HTML elements are valid ARIA attributes as defined by the WAI-ARIA specification.
#9928aa82576 Thanks @aviraldua93! - Ported useValidAriaValues to HTML. Biome now validates static aria-* attribute values in HTML elements against WAI-ARIA types, catching invalid values such as aria-hidden="yes".
Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.
This PR includes no changesets
When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types
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This PR contains the following updates:
2.4.8→2.5.2Release Notes
biomejs/biome (@biomejs/biome)
v2.5.2Compare Source
Patch Changes
#10595
f458028Thanks @pkallos! - Added the optionignoreBooleanCoercionto useNullishCoalescing. When enabled, Biome ignores||and||=used inside aBoolean()call, where coalescing on falsy values is intentional.#10798
4a32b63Thanks @pkallos! - Added the optionignorePrimitivesto useNullishCoalescing. When enabled, Biome ignores||,||=, and ternary expressions whose non-nullish operands are all primitives the option opts out of. Usetrueto ignore all primitives, or an object selectingstring,number,boolean, orbigint.#10545
f3d4c00Thanks @Mokto! - Added the new nursery rulenoSvelteUnnecessaryStateWrap, which reports unnecessary$state()wrapping of classes fromsvelte/reactivitythat are already reactive.#10752
f62fb8bThanks @ematipico! - Fixed #10739. Now the ruleuseValidAutocompletecorrectly flags theautoCompleteattribute.#10796
f1b3ab2Thanks @ematipico! - Fixed #10768. Improved the performance of the Biome Language Server by cancelling certain in-flight operations when there are fast updates.#10719
aa649b5Thanks @minseong0324! - FixednoMisleadingReturnTypefalse positive on returns that use a widening type assertion:"a" as stringis no longer reported as misleading. The rule now also reports a literal-pinning assertion such asfalse as false, matching the existingas constbehavior.#10678
8f073a7Thanks @PranavAchar01! - Fixed #7718: Biome now correctly parses CSS nesting selectors when&appears as a trailing sub-selector after a type selector, e.g.h1& { color: red; }.#10756
5ec965aThanks @denbezrukov! - Fixed CSS formatter output for selector lists withallowWrongLineCommentsand//comments after a selector comma. Biome now keeps the selector before the line comment inline instead of breaking it across descendant combinators.#10757
6232fcdThanks @PranavAchar01! - Fixed #8269: the CSS parser now accepts Tailwind@variantand@utilitynames that start with a digit, such as the2xlbreakpoint.#10777
575ced6Thanks @WaterWhisperer! - Fixed an issue reported in #10708: the GitLab reporter now handles--verbosediagnostics filtering correctly.#10281
0efe244Thanks @Zelys-DFKH! - Fixed a bug where GritQL patterns rejected positional (unkeyed) arguments.#10758
e36fd8aThanks @henrybrewer00-dotcom! - Fixed #10697: The formatter no longer removes the parentheses around anawaitoryieldexpression used as the target of a TypeScript instantiation expression. For example,(await makeFactory)<Value>is no longer reformatted toawait makeFactory<Value>, which would change the meaning of the code.#10586
3617094Thanks @IxxyDev! - Fixed #9568:noFloatingPromisesno longer reports a false positive when calling an overloaded function and the selected overload does not return a promise.#10766
7aff4c1Thanks @JamBalaya56562! - Fixed #2862:noInteractiveElementToNoninteractiveRoleno longer reports custom elements (a tag name containing a dash, e.g.<my-button role="img" />). Per the W3C HTML-ARIA specification, a custom element may be given any role or none.#10680
771daa4Thanks @WaterWhisperer! - Fixed #10635: Biome now recognizes chainedtable tests such as
test.concurrent.each()andit.concurrent.each()as test calls, fixingnoMisplacedAssertionfalse positives and improving formatting for those test declarations.#10759
34570b5Thanks @henrybrewer00-dotcom! - Fixed #10636: noStaticElementInteractions no longer reports a false positive for event handlers on Svelte special elements such as<svelte:window>,<svelte:document>, and<svelte:body>. These are not real DOM elements, so they are now ignored by the rule.#10741
bd2364eThanks @JamBalaya56562! - Fixed #6686: theragecommand now respects the--config-pathoption and theBIOME_CONFIG_PATHenvironment variable when loading the Biome configuration. Previously it always used the default configuration resolution and reported the configuration asNot setwhen nobiome.jsonexisted in the working directory.#10763
2c3e82dThanks @Aqu1bp! - Fixed #10742:noSolidDestructuredPropsnow reports destructured props in Solid function components and JSX children.#10606
a4cc4abThanks @Mokto! - Fixed false positives innoUnusedImports,noUnusedVariables, anduseImportTypefor Svelte components that use both a<script module>and a<script>block. The two blocks compile to a single module and share a top-level scope, so a binding (import, function, or variable) declared in one block and used only in the other is no longer reported as unused.#10767
36d5aa7Thanks @otkrickey! - Fixed #10754:useVueValidVBindno longer reports the Vue 3.4+ same-name shorthand as missing a value.:fooandv-bind:fooare now accepted as equivalent to:foo="foo", whilev-bind,v-bind:[dynamicArg], and:[dynamicArg]without a value continue to be reported.#10775
a918af0Thanks @WaterWhisperer! - Fixed an issue reported in #10708:biome ragedidn't detect running Biome daemon pipes on Windows.#10730
5a2e65bThanks @dinocosta! - Fixed an issue where Biome was resolving the well-known Zed settings file from the wrong location on macOS and Windows.#10807
d97fffeThanks @ematipico! - Fixed an issue where.scssfiles were incorrectly analyzed when runningbiome check.#10672
53c6efcThanks @ematipico! - Fixed a bug where Biome incorrectly formatted snippets that have parsing errors.#10719
aa649b5Thanks @minseong0324! - FixeduseAwaitThenablefalse positive when awaiting a custom thenable that is not the globalPromise. A value with a callablethenmember is now recognized as awaitable.#10734
4396496Thanks @BangDori! - Fixed #10708:biome migratenow preserves trivia when migrating the deprecatedrecommendedoption topreset.#10683
ae31a00Thanks @Netail! - Fixed #10657 #10671 #10661 #10637 #10718: HTML rules now correctly handle dynamic attributes.#10746
54e8239Thanks @ematipico! - Fixed an issue wherenoUndeclaredClassesdidn't correctly detect styles defined inside the Astro directiveis:global.#10770
dd1429cThanks @ematipico! - Improved the Biome Language Server DX by orchestrating certain operations, so that they won't block the editor during typing. This improvement is more visible in large documents.#10473
d9b5133Thanks @Mokto! - ImprovednoUnusedImports,noUnusedVariables,noUnusedFunctionParameters, anduseImportTypefor Svelte, Vue, and Astro files (withhtml.experimentalFullSupportEnabled). Bindings used only in the template — including component tags, attribute interpolations, directives,bind:shorthand, and snippet parameters — are no longer reported as unused, while genuinely unused ones still are.#10796
f1b3ab2Thanks @ematipico! - Fixed an issue where the Biome Language Server didn't enable project or type-aware lint rules, even when they were explicitly enabled.#10746
54e8239Thanks @ematipico! - Fixed an issue wherenoUndeclaredClassesdidn't detect styles declared inside HTML documents.#10774
bde945bThanks @pattrickrice! - Fixed #10268 where a race condition resulted in internal errors such as:The file biome.json does not exist in the workspace.v2.5.1Compare Source
Patch Changes
#10722
f8a303dThanks @denbezrukov! - Fixed CSS formatter output for comments between import media queries.#10738
9fdc560Thanks @JamBalaya56562! - Fixed #9899: thejsonandjson-prettyreporters now escape backslashes in a diagnostic'slocation.path. Previously, paths containing backslashes (such as Windows-style paths) were emitted unescaped, producing invalid JSON.#10626
5f837dfThanks @tom-groves! - Fixed #10625:biome migrateno longer emits an invalid trailing comma when a renamed rule (such asnoConsoleLog→noConsole) is the last member of its rule group. Previously this produced malformed output that aborted the migration of a strict-JSONbiome.jsonwith a parsing error.#10535
c245f9dThanks @Mokto! - Fixed a false positive innoUnusedVariablesfor Svelte files where variables referenced inside{@​html expr}blocks were incorrectly reported as unused.#10668
a0f197eThanks @Netail! - Thebiome initcommand has been updated to include a more up-to-date URL to the first-party extensions page.#10667
d8c3e87Thanks @Netail! - Fixed #10664: useErrorCause now correctly detects a shorthand property.#10696
ef2373fThanks @ematipico! - Fixed #9566. Improved how the Biome Language Server loads multiple configuration files inside a workspace.#10705
4ccb410Thanks @ematipico! - Fixed #10652. Biome plugins are now properly filtered when using--onlyand--skipflags.#10669
aa0a6ebThanks @Netail! - Fixed #10651: useInlineScriptId now correctly trims trivia to detect if an id attribute has been set.#10689
844b1beThanks @ematipico! - Fixed #10658. The issue was caused by the "Go-to definition" editor feature, which was enabled by default. The feature is now disabled by default. To work, the feature triggers the scanner to build the module graph. This caused memory leak issues in cases where Biome starts in the home directory to modify files.If you relied on this new feature, you must now turn on using the [editor settings] of the extension e.g. Zed and VSCode.
#10695
043fbb5Thanks @ematipico! - Fixed #10674. Biome now throws an error when the fieldlevelis missing from a rule option.#10712
5941df2Thanks @Conaclos! - Improved the diagnostic and the documentation ofuseFlatMap.#10615
23814f1Thanks @qwertycxz! - Improved the DX the JSON schema when it's used by certain code editors like VSCode.#10688
ec69489Thanks @ematipico! - Fixed a bug where the Biome Daemon did not correctly shut down when the editor was closed during an in-progress operation, especially while scanning.#10701
6c2e0d7Thanks @ematipico! - Fixed #10694. The Biome Language Server no longer prints an error when the user hovers a variable imported from node_modules.#10681
888515bThanks @Conaclos! - FixeduseExportTypethat reported useless details in some diagnostics.#10220
3694a13Thanks @theBGuy! - FixeduseAnchorContentfalse positive for<a>elements used as render prop values (e.g.render={<a href="..." />}), a pattern where the receiving component renders its children inside the anchor element.#10702
98823fbThanks @ematipico! - Fixed #10612. The Biome parser now correctly parses processing instructions. The following SVG doesn't throw errors anymore:v2.5.0Compare Source
Minor Changes
#9539
f0615fdThanks @ematipico! - Added a new reporter calledconcise. When--reporter=conciseis passed the commandsformat,lint,checkandci, the diagnostics are printed in a compact manner:#9495
2056b23Thanks @aviraldua93! - Added theuseKeyWithClickEventsa11y lint rule for HTML files (.html,.vue,.svelte,.astro). This is a port of the existing JSX rule. The rule enforces that elements with anonclickhandler also have at least one keyboard event handler (onkeydown,onkeyup, oronkeypress) to ensure keyboard accessibility.Inherently keyboard-accessible elements (
<a>,<button>,<input>,<select>,<textarea>,<option>) are excluded, as are elements hidden from assistive technologies (aria-hidden) or withrole="presentation"/role="none".#9152
9ec8500Thanks @ematipico! - Added new nursery lint rulenoUndeclaredClassesfor HTML, JSX, and SFC files (Vue, Astro, Svelte). The rule detects CSS class names used inclass="..."(orclassName) attributes that are not defined in any<style>block or linked stylesheet reachable from the file.#9152
9ec8500Thanks @ematipico! - Added new nursery lint rulenoUnusedClassesfor CSS. The rule detects CSS class selectors that are never referenced in any HTML or JSX file that imports the stylesheet. This is a project-domain rule that requires the module graph.#9546
6567efaThanks @nhedger! - Added abiome upgradecommand for standalone installations. It upgrades Homebrew installs withbrew upgrade biome, updates manually installed binaries from the latest GitHub release, and tells npm users to upgrade with their package manager instead.#9716
701767aThanks @faizkhairi! - Added the HTML version of theuseHeadingContentrule. The rule now enforces that heading elements (h1-h6) have content accessible to screen readers in HTML, Vue, Svelte, and Astro files.#9582
f437ef8Thanks @rahuld109! - Added the HTML version of theuseKeyWithMouseEventsrule. The rule now enforces thatonmouseoveris accompanied byonfocusandonmouseoutis accompanied byonblurin HTML, Vue, Svelte, and Astro files.#9275
1fdbceeThanks @ff1451! - Added the new assist actionuseSortedTypeFields, which sorts the fields of GraphQL object types, interface types and input object types alphabetically, e.g.name, age, idbecomesage, id, name.#10561
78075b7Thanks @Conaclos! - Added a newstyleoption to useExportType,which enforces a style for exporting types.
This is the same option as the one provided by
useImportType.#8987
d16e32bThanks @DerTimonius! - Ported theuseValidAnchorrule to HTML. This rule enforces that all anchors are valid and that they are navigable elements.#9533
4d251d4Thanks @ematipico! - Theinitcommand now prints the Biome logo.#10069
0eb9310Thanks @Netail! - Added the HTML lint rulenoStaticElementInteractions, which enforces that static, visible elements (such as<div>) that have click handlers use the valid role attribute.Invalid:
#9134
2a43488Thanks @ematipico! - Added the assist actionuseSortedPackageJson.This action organizes package.json fields according to the same conventions as the popular sort-package-json tool.
#9309
7daa18bThanks @Bertie690! - TheallowDoubleNegationoption has been added tonoImplicitCoercionsto allow ignoring double negations inside code.With the option enabled, the following example is considered valid and is ignored by the rule:
#9700
894f3fbThanks @ematipico! - The Biome Language server now supports the "go-to definition" feature.When the cursor of the mouse is hovering an entity (variable, CSS class, type, etc.), and the command CTRL + click is triggered, the editor jumps to where this entity is defined, if the language server can find it.
Here's what Biome is able to resolve:
#10070
bae0710Thanks @Conaclos! - Added the:STYLE:group matcher fororganizeImportsthat matches style imports.For example, the following configuration...
{ "assist": { "actions": { "source": { "organizeImports": { "level": "on", "options": { "groups": ["**", "!:STYLE:"], "sortBareImports": true } } } } } }...places style imports last:
#9170
e3107deThanks @mdrobny! - AddedbundleDependenciesoption to NoUndeclaredDependencies rule.This rule now supports imports of packages that are defined only in
bundleDependenciesandbundledDependenciesarrays.#9547
01f8473Thanks @mujpao! - Added new assist ruleuseSortedAttributesfor HTML, porting the existing JSX rule. This rule enforces sorted HTML attributes.Invalid
#9366
2ca1117Thanks @dyc3! - Added thehtml.parser.vueconfiguration option. When enabled, it adds support for the parsing of Vue in.htmlfiles. Most Vue users don't need to enable this option since Vue files typically use the.vueextension, but it can be useful for projects that embed Vue syntax in regular HTML files.#9073
74b20eeThanks @chocky335! - Added support for applying GritQL plugin rewrites as code actions. GritQL plugins that use the rewrite operator (=>) now produce fixable diagnostics for JavaScript, CSS, and JSON files. By default, plugin rewrites are treated as unsafe fixes and require--write --unsafeto apply. Plugin authors can passfix_kind = "safe"toregister_diagnostic()to mark a fix as safe, allowing it to be applied with just--write.Example plugin (
useConsoleInfo.grit):Running
biome check --writeapplies safe rewrites. Unsafe rewrites (the default, orfix_kind = "unsafe") still require--write --unsafe.#9384
f4c9edcThanks @Conaclos! - Added thesortBareImportsoption toorganizeImports,which allows bare imports to be sorted within other imports when set to
false.{ "assist": { "actions": { "source": { "organizeImports": { "level": "on", "options": { "sortBareImports": true } } } } } }#8731
e7872bfThanks @siketyan! - Added the watch mode (--watch) to the CLI forcheck/format/lintcommands. By enabling this option, Biome will re-run the check automatically when any file in the workspace has changed after the first run.#10106
9b35f78Thanks @ematipico! - Biome can now format and lint.svgfiles.#9967
e9b6c17Thanks @dyc3! - Added HTML support fornoExcessiveLinesPerFile. Biome now reports HTML files that exceed the configured line limit, including whenskipBlankLinesis enabled.#9491
b3eb63cThanks @IxxyDev! - Added the HTML lint rulenoAriaUnsupportedElements. This rule enforces that elements that do not support ARIA roles, states, and properties (meta,html,script,style) do not haveroleoraria-*attributes.#9306
afd57a6Thanks @viraxslot! - Added thenoNoninteractiveTabindexlint rule for HTML. This rule enforces thattabindexis not used on non-interactive elements, as it can cause usability issues for keyboard users.#9276
6d041d9Thanks @IxxyDev! - Added the HTML lint rulenoRedundantRoles. This rule enforces that explicitroleattributes are not the same as the implicit/default role of an HTML element. It supports HTML, Vue, Svelte, and Astro files.#9813
69aadc2Thanks @ematipico! - Added a new linter configuration calledpreset. With the new option, users can enable different kinds of rules at once.The following presets are available:
"recommended": it enables all Biome-recommended rules, or recommended rules of a group;"all": it enables all Biome rules, or enables all rules of a group;"none": it disables all Biome rules, or disable all rules of a group.You can enable recommended rules:
{ "linter": { "rules": { "preset": "recommended" } } }You can enable all rules at once:
Or enable all rules for a group:
This new option, however, doesn't affect how nursery rules work. Nursery rules must be enabled singularly, due to their nature.
This new option is meant to replace
recommended, so make sure to run themigratecommand.#10022
3422d71Thanks @Netail! - Added the HTML lint rulenoNoninteractiveElementToInteractiveRole, which enforces that interactive ARIA roles are not assigned to non-interactive HTML elements.Invalid:
#8396
13785fcThanks @apple-yagi! - Biome now supports pnpm catalogs (default and named) when resolving dependencies for linting. This behavior is opt-in and requires settingjavascript.resolver.experimentalPnpmCatalogstotrue.#10028
1009414Thanks @Netail! - Added the HTML lint rulenoInteractiveElementToNoninteractiveRole, which enforces that non-interactive ARIA roles are not assigned to interactive HTML elements.Invalid:
#9853
816302fThanks @Netail! - Added the new assist actionuseSortedSelectionSet, which sorts GraphQL selection sets alphabetically, e.g.name, age, idbecomesage, id, name.Invalid:
#10074
9c7c6ebThanks @georgephillips! - Added akindfield to theImportMatcherused by theorganizeImportsassist action. The new field selects imports by their syntactic kind and currently supportsbare(matching side-effect imports such asimport "polyfill") with optional!negation (!bare). The matcher composes with the existingtypeandsourcefields, so users can express patterns such as "only bare imports that import a CSS file" ({ "kind": "bare", "source": "**/*.css" }).For example, with the following configuration:
{ "assist": { "actions": { "source": { "organizeImports": { "level": "on", "options": { "sortBareImports": true, "groups": [ { "kind": "!bare" }, ":BLANK_LINE:", { "kind": "bare" } ] } } } } } }...the following code:
...is organized as:
#9171
ce65710Thanks @chocky335! - Addedincludesoption for plugin file scoping. Plugins can now be configured with glob patterns to restrict which files they run on. Use negated globs for exclusions.{ "plugins": [ "global-plugin.grit", { "path": "scoped-plugin.grit", "includes": ["src/**/*.ts", "!**/*.test.ts"] } ] }#9617
dcb99efThanks @faizkhairi! - PorteduseAriaActivedescendantWithTabindexa11y rule to HTML.#9496
1dfb829Thanks @aviraldua93! - Added HTML support for thenoAriaHiddenOnFocusableaccessibility lint rule, which enforces thataria-hidden="true"is not set on focusable elements. Focusable elements include native interactive elements (<button>,<input>,<select>,<textarea>), elements withhref(<a>,<area>), elements withtabindex >= 0, and editing hosts (contenteditable). Includes an unsafe fix to remove thearia-hiddenattribute.#9792
f516854Thanks @Maximiliano-Zeballos! - Added theuseSemanticElementslint rule for HTML. The rule now detects the use ofroleattributes in HTML elements and suggests using semantic elements instead.For example, the following code is now flagged:
The rule suggests using
<nav>instead.#9761
cbbb7d5Thanks @Maximiliano-Zeballos! - Ported theuseValidAriaPropslint rule to HTML. This rule checks that allaria-*attributes used in HTML elements are valid ARIA attributes as defined by the WAI-ARIA specification.#9928
aa82576Thanks @aviraldua93! - PorteduseValidAriaValuesto HTML. Biome now validates staticaria-*attribute values in HTML elements against WAI-ARIA types, catching invalid values such asaria-hidden="yes".#10562
6642895Thanks @ematipico! - Promoted 73 nursery rules to stable groups.Four rules were renamed as part of the promotion:
noFloatingClassesis nownoUnusedInstantiation, because the rule checks any discardednewexpression, not only classes.noMultiStris nownoMultilineString.useFindis nowuseArrayFind.useSpreadis nowuseSpreadOverApply, because the rule enforces spread call arguments overFunction.apply(), not array or object spread.Correctness
Promoted the following rules to the
correctnessgroup:noBeforeInteractiveScriptOutsideDocumentnoUnusedInstantiationuseInlineScriptId(recommended, Next.js domain)noVueVIfWithVFor(recommended, Vue domain)useVueValidVBind(recommended, Vue domain)useVueValidVElse(recommended, Vue domain)useVueValidVElseIf(recommended, Vue domain)useVueValidVHtml(recommended, Vue domain)useVueValidVIf(recommended, Vue domain)useVueValidVOn(recommended, Vue domain)useVueValidVText(recommended, Vue domain)useVueValidTemplateRoot(recommended, Vue domain)useVueValidVCloak(recommended, Vue domain)useVueValidVOnce(recommended, Vue domain)useVueValidVPre(recommended, Vue domain)useVueVForKey(recommended, Vue domain)noDuplicateAttributes(recommended)noDuplicateArgumentNames(recommended)noDuplicateInputFieldNames(recommended)noDuplicateVariableNames](https://biomejs.dev/linter/rules/no-duplicate-variable-nConfiguration
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