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This rule validates only root-level <template> elements in Vue single-file components. If the <template> has a src attribute, it must be empty. Otherwise, it must contain content.
Invalid examples:
<template src="./foo.html">content</template>
<template></template>
Valid examples:
<template>content</template>
<template src="./foo.html"></template>
#8586df8fe06 Thanks @dyc3! - Added a new nursery rule useVueConsistentVBindStyle. Enforces consistent v-bind style (:prop shorthand vs v-bind:prop longhand). Default prefers shorthand; configurable via rule options.
#8498d80fa41 Thanks @tt-a1i! - Fixed #8494. Extended noUndeclaredEnvVars to support bracket notation (process.env["VAR"], import.meta.env["VAR"]), Bun runtime (Bun.env.VAR, Bun.env["VAR"]), and Deno runtime (Deno.env.get("VAR")).
#8509574a909 Thanks @ematipico! - Added support for parsing and formatting the Svelte {#await} syntax, when html.experimentalFullSupportEnabled is set to true.
-{#await promise then name }+{#await promise then name}-{:catch name}+{:catch name}
{/await}
#852417a6156 Thanks @JacquesLeupin! - Fixed #8488: Relative plugin paths are now resolved from the configuration file directory, including when configurations are merged (e.g. extends: "//").
#86553260ec9 Thanks @JacquesLeupin! - Fixed #8636: Biome's CSS formatter now breaks comma-separated declaration values at top-level commas when wrapping.
letemptyStr="";letisZero=0;return(<div>{emptyStr&&"Empty String"}{isZero&&"Number is zero"}{" "}</div>);
#851116a9036 Thanks @ematipico! - Improved the diagnostics of the rules useSortedClasses and noUnnecessaryConditions. The diagnostics now state that these rules are a work in progress and link to the relevant GitHub issue.
#85957c85bf0 Thanks @dyc3! - Fixed #8584: The HTML formatter will preserve whitespace after some elements and embedded expressions, which more closely aligns with Prettier's behavior.
- <h1>Hello, {framework}and Svelte!</h1>+ <h1>Hello, {framework} and Svelte!</h1>
#8495b573d14 Thanks @taga3s! - Fixed #8405: noMisusedPromises now emits warnings/errors when a function returns union types such as T | Promise<T> which is used in conditionals.
consta=(): boolean|Promise<boolean>=>Promise.resolve(true);if(a()){}// Now correctly flagged
The rule now recommends Record<keyof any, never> instead of Record<string, never> (the latter of which incorrectly allows symbol-keyed properties).
The rule mentions an alternate method to enforce object emptiness involving unique symbol-based guards used by type-fest and many other packages:
declareconstmySym: unique symbol;// Since this type's only property is an unexported `unique symbol`, nothing that imports it can specify any properties directly// (as far as excess property checks go)exporttypeEmptyObject={[mySym]?: never};exporttypeIsEmptyObject<T>=TextendsEmptyObject ? true : false;
The rule's listed sources have been updated as well to reflect the original source rule (ban-types) having been split into 3 separate rules circa April 2024.
#84935fc24f4 Thanks @ematipico! - Added support for parsing and formatting the Svelte {#each} syntax, when html.experimentalFullSupportEnabled is set to true.
- {#each items as item }+ {#each items as item}
{/each}
#85460196c0e Thanks @Zaczero! - Hardened union static-member type flattening in edge cases (e.g. unions containing unknown or inferred expression types). This keeps inference conservative and avoids unstable type growth in node = node.parent-style loops.
#85691022c76 Thanks @ematipico! - Fixed an issue where the Biome HTML parser would emit a parse error when certain keywords are inside the text of HTML tags.
#8606f50723b Thanks @dyc3! - Fixed #8563: fixed a bounds check on bogus regex literals that caused panics when doing type inference
#85235f22f1c Thanks @ematipico! - Improved the diagnostics of nursery rules. Added a message to diagnostics emitted by nursery rules, so that users are aware of nature of nursery rules.
#857103666fd Thanks @dyc3! - Improved the performance of noRedeclare by eliminating string allocations
#83447b982ba Thanks @ematipico! - Reduced the system calls when running the CLI. The performances might be noticeable in big projects that have multiple libraries and enable project rules.
#85298794883 Thanks @mdevils! - Fixed #8499: useExhaustiveDependencies properly handles aliased destructured object keys when using stableResult configuration.
#85574df2f4d Thanks @dyc3! - Fixed an issue with the HTML formatter where it wouldn't add a space before the /> in self closing elements. This brings the HTML formatter more in line with Prettier.
-<Component/>+<Component />
#8509574a909 Thanks @ematipico! - Added support for parsing and formatting the Svelte {#snippet} syntax, when html.experimentalFullSupportEnabled is set to true.
#8536efbfbe2 Thanks @dyc3! - Fixed #8527: Improved type inference where analyzing code with repeated object property access and assignments (e.g. node = node.parent, a pattern common when traversing trees in a while loop) could hit an internal type limit. Biome now handles these cases without exceeding the type limit.
#858383be210 Thanks @dyc3! - Added the new nursery rule useVueValidVCloak. Enforces that usages of the v-cloak directive in Vue.js SFC are valid.
#8644a3a27a7 Thanks @JacquesLeupin! - Added the nursery rule useVueVapor to enforce <script setup vapor> in Vue SFCs. For example <script setup> is invalid.
#8508b86842c Thanks @tt-a1i! - Fixed #6783: now, when a path is provided via --stdin-file-path, Biome checks whether the file exists on disk. If the path doesn't exist (virtual path), ignore checks (files.includes and VCS ignore rules) are skipped.
#847790e8684 Thanks @dyc3! - Fixed #8475: fixed a regression in how noExtraNonNullAssertion flags extra non-null assertions
#8479250b519 Thanks @dyc3! - Fixed #8473: The semantic model now indexes typescript constructor method definitions, and no longer panics if you use one (a regression in 2.3.9).
#84482af85c1 Thanks @mdevils! - Improved handling of defineProps() macro in Vue components. The noVueReservedKeys rule now avoids false positives in non-setup scripts.
The biome migrate eslint command now correctly detects the rule react/jsx-no-leaked-render in your eslint configurations.
#8426285d932 Thanks @anthonyshew! - Added a Turborepo domain and a new "noUndeclaredEnvVars" rule in it for warning users of unsafe environment variable usage in Turborepos.
#8410a21db74 Thanks @ematipico! - Fixed #2988 where Biome couldn't handle properly characters that contain multiple code points when running in stdin mode.
#8302d1d5014 Thanks @mlafeldt! - Fixed #8109: return statements in Astro frontmatter no longer trigger "Illegal return statement" errors when using experimentalFullSupportEnabled.
#8346f3aee1a Thanks @arendjr! - Fixed #8292: Implement tracking
of types of TypeScript constructor parameter properties.
This resolves certain false negatives in noFloatingPromises and other typed
rules.
Example
classAsyncClass{asyncreturnsPromise(){return"value";}}classShouldBeReported{constructor(publicfield: AsyncClass){}// ^^^^^^^^^^^^----------------- Parameter property declarationasyncshouldBeReported(){// `noFloatingPromises` will now report the following usage:this.field.returnsPromise();}}
#8326153e3c6 Thanks @ematipico! - Improved the rule noBiomeFirstException. The rule can now inspect if extended configurations already contain the catch-all ** inside files.includes and, if so, the rule suggests removing ** from the user configuration.
#8433397547a Thanks @dyc3! - Fixed #7920: The CSS parser, with Tailwind directives enabled, will no longer error when you use things like prefix(tw) in @import at rules.
#8378cc2a62e Thanks @Bertie690! - Clarify diagnostic message for lint/style/useUnifiedTypeSignatures
The rule's diagnostic message now clearly states that multiple similar overload signatures are hard to read & maintain, as opposed to overload signatures in general.
#82969d3ef10 Thanks @dyc3! - biome rage now shows if you have experimental HTML full support enabled.
#841409acf2a Thanks @Bertie690! - Updated the documentation & diagnostic message for lint/nursery/noProto, mentioning the reasons for its longstanding deprecation and why more modern alternatives are preferred.
Notably, the rule clearly states that using __proto__ inside object literal definitions is still allowed, being a standard way to set the prototype of a newly created object.
#8445c3df0e0 Thanks @tt-a1i! - Fix --changed and --staged flags throwing "No such file or directory" error when a file has been deleted or renamed in the working directory. The CLI now filters out files that no longer exist before processing.
#8459b17d12b Thanks @ruidosujeira! - Fix #8435: resolved false positive in noUnusedVariables for generic type parameters in construct signature type members (new <T>(): T).
#8439a78774b Thanks @tt-a1i! - Fixed #8011: useConsistentCurlyBraces no longer suggests removing curly braces from JSX expression children containing characters that would cause parsing issues or semantic changes when converted to plain JSX text ({, }, <, >, &).
#8436a392c06 Thanks @ruidosujeira! - Fixed #8429. Formatter, linter, and assist settings now correctly inherit from global configuration when not explicitly specified in overrides.
Before this fix, when an override specified only one feature (e.g., only linter), other features would be incorrectly disabled instead of inheriting from global settings.
#8441cf37d0d Thanks @tt-a1i! - Fixed #6577: noUselessUndefined no longer reports () => undefined in arrow function expression bodies. Previously, the rule would flag this pattern and suggest replacing it with () => {}, which conflicts with the noEmptyBlockStatements rule.
#84448caa7a0 Thanks @tt-a1i! - Fix noUnknownMediaFeatureName false positive for prefers-reduced-transparency media feature. The feature name was misspelled as prefers-reduded-transparency in the keywords list.
#8443c3fa5a1 Thanks @tt-a1i! - Fix useGenericFontNames false positive when a CSS variable is used as the last value in font-family or font. The rule now correctly ignores cases like font-family: "Noto Serif", var(--serif) and font: 1em Arial, var(--fallback).
#8315c7915c4 Thanks @hirokiokada77! - Fixed #5213: The noDoneCallback rule no longer flags false positives when a method is called on a regular variable bound to identifiers such as before, after, beforeEach, and afterEach.
The diagnostic message has also been tweaked for readability.
#82429694e37 Thanks @dyc3! - Fixed bugs in the HTML parser so that it will flag invalid shorthand syntaxes instead of silently accepting them. For example, <Foo : foo="5" /> is now invalid because there is a space after the :.
#8297efa694c Thanks @Yonom! - Added support for negative value utilities in useSortedClasses. Negative value utilities such as -ml-2 or -top-4 are now recognized and sorted correctly alongside their positive counterparts.
// Now detected as unsorted:<divclass="-ml-2 p-4 -mt-1"/>// Suggested fix:<divclass="-mt-1 -ml-2 p-4"/>
The rule now correctly distinguishes between nested non-null assertions (still flagged) and separate non-null assertions on different sides of an assignment (allowed).
Previously, a logical error caused the rule to be unable to detect dependency arrays placed before hook callbacks, producing spurious errors and blocking further diagnostics.
functioncomponent(){letthing=5;// The rule will now correctly recognize `thing` as being specified// instead of erroring due to "missing" dependency arraysdoSomething([thing],"blah",()=>{console.log(thing);});}
The rule documentation & diagnostic messages have also been reworked for improved clarity.
#83658f36051 Thanks @JacquesLeupin! - Fixed #8360: GritQL plugins defined in child configurations with extends: "//" now work correctly.
This new change will ignore attribute and only show diagnostics for JSX Expressions
For example
Valid:
<Somethingchecked={isOpen&&items.length}/>
Invalid:
constComponent=()=>{returnisOpen&&items.length;};
#8356f9673fc Thanks @ematipico! - Fixed #7917, where Biome removed the styles contained in a <style lang="scss">, when experimentalFullSupportEnabled is enabled.
#8371d71924e Thanks @ematipico! - Fixed #7343, where Biome failed to resolve extended configurations from parent directories using relative paths.
#83289cf2332 Thanks @Netail! - Corrected rule source reference. biome migrate eslint should do a bit better detecting rules in your eslint configurations.
#8403c96dcf2 Thanks @dyc3! - Fixed #8340: noUnknownProperty will no longer flag anything in @plugin when the parser option tailwindDirectives is enabled
#82844976d1b Thanks @denbezrukov! - Improved the performance of the Biome Formatter by enabling the internal source maps only when needed.
#83827409cba Thanks @fireairforce! - Fixed #8338: Ignored the noUnknownTypeSelector check when the root selector is used under View Transition pseudo-elements.
#81884ca088c Thanks @ematipico! - Fixed #7390, where Biome couldn't apply the correct configuration passed via --config-path.
If you have multiple root configuration files, running any command with --config-path will now apply the chosen configuration file.
#817179adaea Thanks @dibashthapa! - Added the new rule noLeakedRender. This rule helps prevent potential leaks when rendering components that use binary expressions or ternaries.
For example, the following code triggers the rule because the component would render 0:
#8256f1e4696 Thanks @cormacrelf! - Fixed a bug where logs were discarded (the kind from --log-level=info etc.). This is a regression introduced after an internal refactor that wasn't adequately tested.
#82263f19b52 Thanks @dyc3! - Fixed #8222: The HTML parser, with Vue directives enabled, can now parse v-slot shorthand syntax, e.g. <template #foo>.
Biome now allows filenames starting with the dollar-sign (e.g. $postId.tsx) by default to support naming conventions used by frameworks such as TanStack Start for file-based-routing.
#822598ca2ae Thanks @ongyuxing! - Fixed #7806: Prefer breaking after the assignment operator for conditional types with generic parameters to match Prettier.
// example.jsexportfunctionexample(){return1;}// Re-exports all named exports from the current module under a single namespace// and then imports the namespace from the current module.// Allows for encapsulating functions/variables into a namespace instead// of using a static class.export*asExamplefrom"./example.js";import{Example}from"./example.js";
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
Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 2.x releases. But if you manually upgrade to 2.x then Renovate will re-enable minor and patch updates automatically.
If you accidentally closed this PR, or if you changed your mind: rename this PR to get a fresh replacement PR.
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This PR contains the following updates:
1.9.4→2.3.11Release Notes
biomejs/biome (@biomejs/biome)
v2.3.11Compare Source
Patch Changes
#8583
83be210Thanks @dyc3! - Added the new nursery ruleuseVueValidTemplateRoot.This rule validates only root-level
<template>elements in Vue single-file components. If the<template>has asrcattribute, it must be empty. Otherwise, it must contain content.Invalid examples:
Valid examples:
#8586
df8fe06Thanks @dyc3! - Added a new nursery ruleuseVueConsistentVBindStyle. Enforces consistentv-bindstyle (:propshorthand vsv-bind:proplonghand). Default prefers shorthand; configurable via rule options.#8587
9a8c98dThanks @dyc3! - Added the ruleuseVueVForKey, which enforces that any element usingv-foralso specifies akey.Invalid
Valid
#8586
df8fe06Thanks @dyc3! - Added a new nursery ruleuseVueConsistentVOnStyle. Enforces consistentv-onstyle (@eventshorthand vsv-on:eventlonghand). Default prefers shorthand; configurable via rule options.#8583
83be210Thanks @dyc3! - Added the new nursery ruleuseVueValidVOnce. Enforces that usages of thev-oncedirective in Vue.js SFC are valid.#8498
d80fa41Thanks @tt-a1i! - Fixed #8494. ExtendednoUndeclaredEnvVarsto support bracket notation (process.env["VAR"],import.meta.env["VAR"]), Bun runtime (Bun.env.VAR,Bun.env["VAR"]), and Deno runtime (Deno.env.get("VAR")).#8509
574a909Thanks @ematipico! - Added support for parsing and formatting the Svelte{#await}syntax, whenhtml.experimentalFullSupportEnabledis set totrue.#8316
d64e92dThanks @washbin! - Added the new nursery rulenoMultiAssign. This rule helps to prevent multiple chained assignments.For example, the following code triggers because there are two assignment expressions in the same statement.
#8592
a5f59cdThanks @Netail! - Added the nursery ruleuseUniqueInputFieldNames. Require fields within an input object to be unique.Invalid:
#8524
17a6156Thanks @JacquesLeupin! - Fixed #8488: Relative plugin paths are now resolved from the configuration file directory, including when configurations are merged (e.g.extends: "//").#8655
3260ec9Thanks @JacquesLeupin! - Fixed #8636: Biome's CSS formatter now breaks comma-separated declaration values at top-level commas when wrapping.#8537
cc3e851Thanks @dibashthapa! - Fixed #8491: Resolved false positive errors for safe boolean expressions. There are still pending fixes. Head to #8491 (comment) for more detailsThis new change will check for safe boolean expressions in variable declarations.
For example,
Valid:
Invalid:
#8511
16a9036Thanks @ematipico! - Improved the diagnostics of the rulesuseSortedClassesandnoUnnecessaryConditions. The diagnostics now state that these rules are a work in progress and link to the relevant GitHub issue.#8521
a704be9Thanks @ToBinio! - Added the nursery ruleuseVueConsistentDefinePropsDeclaration, which enforces consistentdefinePropsdeclaration style.Invalid
Valid
#8595
7c85bf0Thanks @dyc3! - Fixed #8584: The HTML formatter will preserve whitespace after some elements and embedded expressions, which more closely aligns with Prettier's behavior.#8598
5e85d43Thanks @Netail! - Added the nursery ruleuseUniqueFieldDefinitionNames. Require all fields of a type to be unique.Invalid:
#8495
b573d14Thanks @taga3s! - Fixed #8405:noMisusedPromisesnow emits warnings/errors when a function returns union types such asT | Promise<T>which is used in conditionals.#8632
0be7d12Thanks @Bertie690! - The documentation & rule sources forlint/complexity/noBannedTypeshave been updated to fix a few oversights.In addition to some general typo fixes:
The rule now recommends
Record<keyof any, never>instead ofRecord<string, never>(the latter of which incorrectly allows symbol-keyed properties).The rule mentions an alternate method to enforce object emptiness involving
unique symbol-based guards used bytype-festand many other packages:The rule's listed sources have been updated as well to reflect the original source rule (
ban-types) having been split into 3 separate rules circa April 2024.#8580
a3a1ad2Thanks @taga3s! - Added the nursery rulenoBeforeInteractiveScriptOutsideDocumentto the Next.js domain.This rule prevents usage of
next/script'sbeforeInteractivestrategy outside ofpages/_document.js.#8493
5fc24f4Thanks @ematipico! - Added support for parsing and formatting the Svelte{#each}syntax, whenhtml.experimentalFullSupportEnabledis set totrue.#8546
0196c0eThanks @Zaczero! - Hardened union static-member type flattening in edge cases (e.g. unions containingunknownor inferred expression types). This keeps inference conservative and avoids unstable type growth innode = node.parent-style loops.#8569
1022c76Thanks @ematipico! - Fixed an issue where the Biome HTML parser would emit a parse error when certain keywords are inside the text of HTML tags.#8606
f50723bThanks @dyc3! - Fixed #8563: fixed a bounds check on bogus regex literals that caused panics when doing type inference#7410
ab9af9aThanks @sgarcialaguna! - Added the new nursery rulenoJsxPropsBind. This rule disallows .bind(), arrow functions, or function expressions in JSX props.Invalid:
#8523
5f22f1cThanks @ematipico! - Improved the diagnostics of nursery rules. Added a message to diagnostics emitted by nursery rules, so that users are aware of nature of nursery rules.#8571
03666fdThanks @dyc3! - Improved the performance ofnoRedeclareby eliminating string allocations#8591
9dd9ca7Thanks @Netail! - Added the nursery ruleuseUniqueArgumentNames. Enforce unique arguments for GraphQL fields & directives.Invalid:
#8521
a704be9Thanks @ToBinio! - Update useVueDefineMacrosOrder to only run on <script setup> blocks.#8344
7b982baThanks @ematipico! - Reduced the system calls when running the CLI. The performances might be noticeable in big projects that have multiple libraries and enable project rules.#8588
958e24bThanks @Netail! - Added the nursery ruleuseUniqueVariableNames. Enforce unique variable names for GraphQL operations.Invalid:
#8529
8794883Thanks @mdevils! - Fixed #8499:useExhaustiveDependenciesproperly handles aliased destructured object keys when usingstableResultconfiguration.#8557
4df2f4dThanks @dyc3! - Fixed an issue with the HTML formatter where it wouldn't add a space before the/>in self closing elements. This brings the HTML formatter more in line with Prettier.#8509
574a909Thanks @ematipico! - Added support for parsing and formatting the Svelte{#snippet}syntax, whenhtml.experimentalFullSupportEnabledis set totrue.#8248
1231a5cThanks @emilyinure! - Added new nursery rulenoReturnAssign, which disallows assignments inside return statements.Invalid:
#8531
6b09620Thanks @taga3s! - Fixed #8472: The CSS parser can now accept multiple comma separated parameters in:active-view-transition-type.#8615
b9da66dThanks @taga3s! - Removenext/scriptcomponent name check fromnoBeforeInteractiveScriptOutsideDocumentsince it is a default export.#8536
efbfbe2Thanks @dyc3! - Fixed #8527: Improved type inference where analyzing code with repeated object property access and assignments (e.g.node = node.parent, a pattern common when traversing trees in a while loop) could hit an internal type limit. Biome now handles these cases without exceeding the type limit.#8583
83be210Thanks @dyc3! - Added the new nursery ruleuseVueValidVCloak. Enforces that usages of thev-cloakdirective in Vue.js SFC are valid.#8583
83be210Thanks @dyc3! - Added the new nursery ruleuseVueValidVPre. Enforces that usages of thev-predirective in Vue.js SFC are valid.#8644
a3a27a7Thanks @JacquesLeupin! - Added the nursery ruleuseVueVaporto enforce<script setup vapor>in Vue SFCs. For example<script setup>is invalid.#8508
b86842cThanks @tt-a1i! - Fixed #6783: now, when a path is provided via--stdin-file-path, Biome checks whether the file exists on disk. If the path doesn't exist (virtual path), ignore checks (files.includesand VCS ignore rules) are skipped.v2.3.10Compare Source
Patch Changes
#8417
c3a2557Thanks @taga3s! - Fixed #7809:noRedeclareno longer reports redeclarations forinfertype in conditional types.#8477
90e8684Thanks @dyc3! - Fixed #8475: fixed a regression in hownoExtraNonNullAssertionflags extra non-null assertions#8479
250b519Thanks @dyc3! - Fixed #8473: The semantic model now indexes typescript constructor method definitions, and no longer panics if you use one (a regression in 2.3.9).#8448
2af85c1Thanks @mdevils! - Improved handling ofdefineProps()macro in Vue components. ThenoVueReservedKeysrule now avoids false positives in non-setup scripts.#8420
42033b0Thanks @vsn4ik! - Fixed the nursery rulenoLeakedRender.The
biome migrate eslintcommand now correctly detects the rulereact/jsx-no-leaked-renderin your eslint configurations.#8426
285d932Thanks @anthonyshew! - Added a Turborepo domain and a new "noUndeclaredEnvVars" rule in it for warning users of unsafe environment variable usage in Turborepos.#8410
a21db74Thanks @ematipico! - Fixed #2988 where Biome couldn't handle properly characters that contain multiple code points when running instdinmode.#8372
b352ee4Thanks @Netail! - Added the nursery rulenoAmbiguousAnchorText, which disallows ambiguous anchor descriptions.Invalid
v2.3.9Compare Source
Patch Changes
#8232
84c9e08Thanks @ruidosujeira! - Added the nursery rulenoScriptUrl.This rule disallows the use of
javascript:URLs, which are considered a form ofevaland can pose security risks such as XSS vulnerabilities.#8341
343dc4dThanks @arendjr! - Added the nursery ruleuseAwaitThenable, which enforces thatawaitis only used on Promise values.Invalid
Caution
This is a first iteration of the rule, and does not yet detect generic "thenable" values.
#8034
e7e0f6cThanks @Netail! - Added the nursery ruleuseRegexpExec. EnforceRegExp#execoverString#matchif no global flag is provided.#8137
d407efbThanks @denbezrukov! - Reduced the internal memory used by the Biome formatter.#8281
30b046fThanks @tylersayshi! - Added the ruleuseRequiredScripts, which enforces presence of configurable entries in thescriptssection ofpackage.jsonfiles.#8290
d74c8bdThanks @dyc3! - The HTML formatter has been updated to match Prettier 3.7's behavior for handling<iframe>'sallowattribute.#8302
d1d5014Thanks @mlafeldt! - Fixed #8109: return statements in Astro frontmatter no longer trigger "Illegal return statement" errors when usingexperimentalFullSupportEnabled.#8346
f3aee1aThanks @arendjr! - Fixed #8292: Implement trackingof types of TypeScript constructor parameter properties.
This resolves certain false negatives in
noFloatingPromisesand other typedrules.
Example
#8326
153e3c6Thanks @ematipico! - Improved the rulenoBiomeFirstException. The rule can now inspect if extended configurations already contain the catch-all**insidefiles.includesand, if so, the rule suggests removing**from the user configuration.#8433
397547aThanks @dyc3! - Fixed #7920: The CSS parser, with Tailwind directives enabled, will no longer error when you use things likeprefix(tw)in@importat rules.#8378
cc2a62eThanks @Bertie690! - Clarify diagnostic message forlint/style/useUnifiedTypeSignaturesThe rule's diagnostic message now clearly states that multiple similar overload signatures are hard to read & maintain, as opposed to overload signatures in general.
#8296
9d3ef10Thanks @dyc3! -biome ragenow shows if you have experimental HTML full support enabled.#8414
09acf2aThanks @Bertie690! - Updated the documentation & diagnostic message forlint/nursery/noProto, mentioning the reasons for its longstanding deprecation and why more modern alternatives are preferred.Notably, the rule clearly states that using
__proto__inside object literal definitions is still allowed, being a standard way to set the prototype of a newly created object.#8445
c3df0e0Thanks @tt-a1i! - Fix--changedand--stagedflags throwing "No such file or directory" error when a file has been deleted or renamed in the working directory. The CLI now filters out files that no longer exist before processing.#8459
b17d12bThanks @ruidosujeira! - Fix #8435: resolved false positive innoUnusedVariablesfor generic type parameters in construct signature type members (new <T>(): T).#8439
a78774bThanks @tt-a1i! - Fixed #8011:useConsistentCurlyBracesno longer suggests removing curly braces from JSX expression children containing characters that would cause parsing issues or semantic changes when converted to plain JSX text ({,},<,>,&).#8436
a392c06Thanks @ruidosujeira! - Fixed #8429. Formatter, linter, and assist settings now correctly inherit from global configuration when not explicitly specified in overrides.Before this fix, when an override specified only one feature (e.g., only
linter), other features would be incorrectly disabled instead of inheriting from global settings.Example configuration that now works correctly:
{ "formatter": { "enabled": true }, "overrides": [ { "includes": ["*.vue"], "linter": { "enabled": false } } ] }After this fix,
.vuefiles will have the linter disabled (as specified in the override) but the formatter enabled (inherited from global settings).#8411
9f1b3b0Thanks @rriski! - Properly handlename,type_arguments, andattributesslots forJsxOpeningElementandJsxSelfClosingElementGritQL patterns.The following biome search commands no longer throw errors:
#8441
cf37d0dThanks @tt-a1i! - Fixed #6577:noUselessUndefinedno longer reports() => undefinedin arrow function expression bodies. Previously, the rule would flag this pattern and suggest replacing it with() => {}, which conflicts with thenoEmptyBlockStatementsrule.#8444
8caa7a0Thanks @tt-a1i! - FixnoUnknownMediaFeatureNamefalse positive forprefers-reduced-transparencymedia feature. The feature name was misspelled asprefers-reduded-transparencyin the keywords list.#8443
c3fa5a1Thanks @tt-a1i! - FixuseGenericFontNamesfalse positive when a CSS variable is used as the last value infont-familyorfont. The rule now correctly ignores cases likefont-family: "Noto Serif", var(--serif)andfont: 1em Arial, var(--fallback).#8281
30b046fThanks @tylersayshi! - FixednoDuplicateDependenciesincorrectly triggering on files like_package.json.#8315
c7915c4Thanks @hirokiokada77! - Fixed #5213: ThenoDoneCallbackrule no longer flags false positives when a method is called on a regular variable bound to identifiers such asbefore,after,beforeEach, andafterEach.#8398
204844fThanks @Bertie690! - The default value of theignoreRestSiblingsoption fornoUnusedVariables'has been reverted to its prior value of
trueafter an internal refactor accidentally changed it.The diagnostic message has also been tweaked for readability.
#8242
9694e37Thanks @dyc3! - Fixed bugs in the HTML parser so that it will flag invalid shorthand syntaxes instead of silently accepting them. For example,<Foo : foo="5" />is now invalid because there is a space after the:.#8297
efa694cThanks @Yonom! - Added support for negative value utilities inuseSortedClasses. Negative value utilities such as-ml-2or-top-4are now recognized and sorted correctly alongside their positive counterparts.#8335
3710702Thanks @dibashthapa! - Added the new nursery ruleuseDestructuring. This rule helps to encourage destructuring from arrays and objects.For example, the following code triggers because the variable name
xmatches the propertyfoo.x, making it ideal for object destructuring syntax.#8383
59b2f9aThanks @ematipico! - Fixed #7927:noExtraNonNullAssertionincorrectly flagged separate non-null assertions on both sides of an assignment.The rule now correctly distinguishes between nested non-null assertions (still flagged) and separate non-null assertions on different sides of an assignment (allowed).
Examples
Valid (now allowed)
Invalid (still flagged)
#8401
382786bThanks @Bertie690! -useExhaustiveDependenciesnow correctly validates custom hooks whose dependency arrays come before their callbacks.Previously, a logical error caused the rule to be unable to detect dependency arrays placed before hook callbacks, producing spurious errors and blocking further diagnostics.
{ "linter": { "rules": { "correctness": { "useExhaustiveDependencies": { "level": "error", "options": { "hooks": [ { "name": "doSomething", "closureIndex": 2, "dependenciesIndex": 0 } ] } } } } } }The rule documentation & diagnostic messages have also been reworked for improved clarity.
#8365
8f36051Thanks @JacquesLeupin! - Fixed #8360: GritQL plugins defined in child configurations withextends: "//"now work correctly.#8306
8de2774Thanks @dibashthapa! - Fixed #8288: Fixed the issue with false positive errorsThis new change will ignore attribute and only show diagnostics for JSX Expressions
For example
Valid:
Invalid:
#8356
f9673fcThanks @ematipico! - Fixed #7917, where Biome removed the styles contained in a<style lang="scss">, whenexperimentalFullSupportEnabledis enabled.#8371
d71924eThanks @ematipico! - Fixed #7343, where Biome failed to resolve extended configurations from parent directories using relative paths.#8404
6a221f9Thanks @fireairforce! - Fixed #7826, where a class member namedasyncwill not cause the parse error.#8249
893e36cThanks @cormacrelf! - Addressed #7538. Reduced thevolume of logging from the LSP server.
Use
biome cleanto remove large logs.#8303
db2c65bThanks @hirokiokada77! - Fixed #8300:noUnusedImportsnow detects JSDoc tags on object properties.#8328
9cf2332Thanks @Netail! - Corrected rule source reference.biome migrate eslintshould do a bit better detecting rules in your eslint configurations.#8403
c96dcf2Thanks @dyc3! - Fixed #8340:noUnknownPropertywill no longer flag anything in@pluginwhen the parser optiontailwindDirectivesis enabled#8284
4976d1bThanks @denbezrukov! - Improved the performance of the Biome Formatter by enabling the internal source maps only when needed.#8260
a226b28Thanks @ho991217! - Fixed biome-vscode#817: Biome now updates documents when thetextDocument/didSavenotification is received.#8183
b064786Thanks @hornta! - Fixed #8179: TheuseConsistentArrowReturnrule now correctly handles multiline expressions in its autofix when thestyleoption is set to"always".Previously, the autofix would incorrectly place a newline after the
returnkeyword, causing unexpected behavior.Example:
Now correctly autofixes to:
const foo = (l) => { - return - l.split('\n'); + return l.split('\n'); }#8382
7409cbaThanks @fireairforce! - Fixed #8338: Ignored thenoUnknownTypeSelectorcheck when therootselector is used under View Transition pseudo-elements.Example
#7513
e039f3bThanks @AsherDe! - Added the nursery rulenoVueSetupPropsReactivityLoss.This new rule disallows usages that cause the reactivity of
propspassed to thesetupfunction to be lost.Invalid code example:
v2.3.8Compare Source
Patch Changes
#8188
4ca088cThanks @ematipico! - Fixed #7390, where Biome couldn't apply the correct configuration passed via--config-path.If you have multiple root configuration files, running any command with
--config-pathwill now apply the chosen configuration file.#8171
79adaeaThanks @dibashthapa! - Added the new rulenoLeakedRender. This rule helps prevent potential leaks when rendering components that use binary expressions or ternaries.For example, the following code triggers the rule because the component would render
0:#8116
b537918Thanks @Netail! - Added the nursery rulenoDuplicatedSpreadProps. Disallow JSX prop spreading the same identifier multiple times.Invalid:
#8256
f1e4696Thanks @cormacrelf! - Fixed a bug where logs were discarded (the kind from--log-level=infoetc.). This is a regression introduced after an internal refactor that wasn't adequately tested.#8226
3f19b52Thanks @dyc3! - Fixed #8222: The HTML parser, with Vue directives enabled, can now parsev-slotshorthand syntax, e.g.<template #foo>.#8007
182ecdcThanks @brandonmcconnell! - Added support for dollar-sign-prefixed filenames in theuseFilenamingConventionrule.Biome now allows filenames starting with the dollar-sign (e.g.
$postId.tsx) by default to support naming conventions used by frameworks such as TanStack Start for file-based-routing.#8218
91484d1Thanks @hirokiokada77! - Added thenoMultiStrrule, which disallows creating multiline strings by escaping newlines.Invalid:
Valid:
#8225
98ca2aeThanks @ongyuxing! - Fixed #7806: Prefer breaking after the assignment operator for conditional types with generic parameters to match Prettier.#6765
23f7855Thanks @emilyinure! - Fixed #6569: Allow files to export from themselves withnoImportCycles.This means the following is now allowed:
#8214
68c052eThanks @hirokiokada77! - Added thenoEqualsToNullrule, which enforces the use of===and!==for comparison withnullinstead of==or!=.Invalid:
Valid:
#8219
793bb9aThanks @dyc3! - Fixed #8190: The HTML parser will now parse Vue event handlers that containConfiguration
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