biomejs/biome @biomejs/biome@2.3.11 on GitHub

2.3.11

Patch Changes

#8583 83be210 Thanks @dyc3! - Added the new nursery rule useVueValidTemplateRoot.
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>
```
#8586 df8fe06 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.
#8587 9a8c98d Thanks @dyc3! - Added the rule useVueVForKey, which enforces that any element using v-for also specifies a key.
Invalid
```
<li v-for="item in items">{{ item }}</li>
```
Valid
```
<li v-for="item in items" :key="item.id">{{ item }}</li>
```
#8586 df8fe06 Thanks @dyc3! - Added a new nursery rule useVueConsistentVOnStyle. Enforces consistent v-on style (@event shorthand vs v-on:event longhand). Default prefers shorthand; configurable via rule options.
#8583 83be210 Thanks @dyc3! - Added the new nursery rule useVueValidVOnce. Enforces that usages of the v-once directive in Vue.js SFC are valid.
```

<div v-once />


<div v-once:aaa />
<div v-once.bbb />
<div v-once="ccc" />
```
#8498 d80fa41 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")).
#8509 574a909 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}
```
#8316 d64e92d Thanks @washbin! - Added the new nursery rule noMultiAssign. This rule helps to prevent multiple chained assignments.
For example, the following code triggers because there are two assignment expressions in the same statement.
```
const a = (b = 0);
```
#8592 a5f59cd Thanks @Netail! - Added the nursery rule useUniqueInputFieldNames. Require fields within an input object to be unique.
Invalid:
```
query A($x: Int, $x: Int) {
  field
}
```
#8524 17a6156 Thanks @JacquesLeupin! - Fixed #8488: Relative plugin paths are now resolved from the configuration file directory, including when configurations are merged (e.g. extends: "//").
#8655 3260ec9 Thanks @JacquesLeupin! - Fixed #8636: Biome's CSS formatter now breaks comma-separated declaration values at top-level commas when wrapping.

#8537 cc3e851 Thanks @dibashthapa! - Fixed #8491: Resolved false positive errors for safe boolean expressions. There are still pending fixes. Head to #8491 (comment) for more details

This new change will check for safe boolean expressions in variable declarations.

For example,

Valid:

let isOne = 1;
let isPositiveNumber = number > 0;

return (
  <div>
    {" "}
    {isOne && "One"} {isPositiveNumber && "Is positive"}
  </div>
);

Invalid:

let emptyStr = "";
let isZero = 0;

return (
  <div>
    {emptyStr && "Empty String"} {isZero && "Number is zero"}{" "}
  </div>
);

#8511 16a9036 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.

#8521 a704be9 Thanks @ToBinio! - Added the nursery rule useVueConsistentDefinePropsDeclaration, which enforces consistent defineProps declaration style.

Invalid

<script setup lang="ts">
const props = defineProps({
  kind: { type: String },
});
</script>

Valid

<script setup lang="ts">
const props = defineProps<{
  kind: string;
}>();
</script>

#8595 7c85bf0 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>
```
#8598 5e85d43 Thanks @Netail! - Added the nursery rule useUniqueFieldDefinitionNames. Require all fields of a type to be unique.
Invalid:
```
type SomeObject {
  foo: String
  foo: String
}
```
#8495 b573d14 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.
```
const a = (): boolean | Promise<boolean> => Promise.resolve(true);
if (a()) {
} // Now correctly flagged
```
#8632 0be7d12 Thanks @Bertie690! - The documentation & rule sources for lint/complexity/noBannedTypes have been updated to fix a few oversights.
In addition to some general typo fixes:
- 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:
```
declare const mySym: 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)
export type EmptyObject = { [mySym]?: never };
export type IsEmptyObject<T> = T extends EmptyObject ? 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.
#8580 a3a1ad2 Thanks @taga3s! - Added the nursery rule noBeforeInteractiveScriptOutsideDocument to the Next.js domain.
This rule prevents usage of next/script's beforeInteractive strategy outside of pages/_document.js.
#8493 5fc24f4 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}
```
#8546 0196c0e 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.
#8569 1022c76 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.
#8606 f50723b Thanks @dyc3! - Fixed #8563: fixed a bounds check on bogus regex literals that caused panics when doing type inference
#7410 ab9af9a Thanks @sgarcialaguna! - Added the new nursery rule noJsxPropsBind. This rule disallows .bind(), arrow functions, or function expressions in JSX props.
Invalid:
```
<Foo onClick={() => console.log("Hello!")}></Foo>
```
#8523 5f22f1c 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.
#8571 03666fd Thanks @dyc3! - Improved the performance of noRedeclare by eliminating string allocations
#8591 9dd9ca7 Thanks @Netail! - Added the nursery rule useUniqueArgumentNames. Enforce unique arguments for GraphQL fields & directives.
Invalid:
```
query {
  field(arg1: "value", arg1: "value")
}
```
#8521 a704be9 Thanks @ToBinio! - Update useVueDefineMacrosOrder to only run on <script setup> blocks.
#8344 7b982ba 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.
#8588 958e24b Thanks @Netail! - Added the nursery rule useUniqueVariableNames. Enforce unique variable names for GraphQL operations.
Invalid:
```
query ($x: Int, $x: Int) {
  field
}
```
#8529 8794883 Thanks @mdevils! - Fixed #8499: useExhaustiveDependencies properly handles aliased destructured object keys when using stableResult configuration.
#8557 4df2f4d 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 />
```
#8509 574a909 Thanks @ematipico! - Added support for parsing and formatting the Svelte {#snippet} syntax, when html.experimentalFullSupportEnabled is set to true.
```
-{#snippet    foo() }
+{#snippet foo()}

{/snippe}
```
#8248 1231a5c Thanks @emilyinure! - Added new nursery rule noReturnAssign, which disallows assignments inside return statements.
Invalid:
```
function f(a) {
  return (a = 1);
}
```
#8531 6b09620 Thanks @taga3s! - Fixed #8472: The CSS parser can now accept multiple comma separated parameters in :active-view-transition-type.
#8615 b9da66d Thanks @taga3s! - Remove next/script component name check from noBeforeInteractiveScriptOutsideDocument since it is a default export.
#8536 efbfbe2 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.
#8583 83be210 Thanks @dyc3! - Added the new nursery rule useVueValidVCloak. Enforces that usages of the v-cloak directive in Vue.js SFC are valid.
```

<div v-cloak />


<div v-cloak:aaa />
<div v-cloak.bbb />
<div v-cloak="ccc" />
```
#8583 83be210 Thanks @dyc3! - Added the new nursery rule useVueValidVPre. Enforces that usages of the v-pre directive in Vue.js SFC are valid.
```

<div v-pre />


<div v-pre:aaa />
<div v-pre.bbb />
<div v-pre="ccc" />
```
#8644 a3a27a7 Thanks @JacquesLeupin! - Added the nursery rule useVueVapor to enforce <script setup vapor> in Vue SFCs. For example <script setup> is invalid.
#8508 b86842c 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.

What's Changed

fix: mdx generation by @Netail in #8492
feat(html): support for svelte #each by @ematipico in #8493
chore(deps): update typescript-eslint monorepo to v8.50.0 by @renovate[bot] in #8464
fix(dx): gate usage of biome_configuration in rules behind feature flag by @dyc3 in #8496
feat(lint): ported noMultiAssign from eslint by @washbin in #8316
feat(html): parse #await and #snippet by @ematipico in #8509
chore(analyzer): improve diagnostics by @ematipico in #8511
perf(core): reduce system calls by @ematipico in #8344
feat(graph): support CSS files by @ematipico in #8329
refactor(parse/tailwind): use trivia again by @dyc3 in #8513
feat(parse/tailwind): parse data attribute selectors as dedicated syntax by @dyc3 in #8514
feat(analyze/vue): add useVueConsistentDefinePropsDeclaration by @ToBinio in #8521
fix(linter): useExhaustiveDependencies properly handles aliased destructured object keys when using stableResult configuration by @mdevils in #8529
fix(yaml_parser): comment break yaml mapping by @l0ngvh in #8530
fix(analyzer): nursery rules diagnostics by @ematipico in #8523
chore: use tombi by @ematipico in #8534
fix(analyze/types): reduce created types when flattening a static member access on a union type by @dyc3 in #8536
perf(parse/tw): avoid going into basename store trie when not needed by @dyc3 in #8528
fix(html): fmt svelte children by @ematipico in #8539
fix(parser/css): :active-view-transition-type parameters should accept comma-separated custom identifiers by @taga3s in #8531
chore(deps): update github-actions by @renovate[bot] in #8541
chore(deps): update @biomejs packages by @renovate[bot] in #8542
chore(deps): pin dependency tombi to 0.7.4 by @renovate[bot] in #8540
chore(deps): update dependency @types/node to v24.10.4 by @renovate[bot] in #8543
chore(deps): update dependency eslint to v9.39.2 by @renovate[bot] in #8544
chore(deps): update pnpm to v10.26.1 by @renovate[bot] in #7957
chore(deps): update github-actions (major) by @renovate[bot] in #8548
fix(linter): nursery/noMisusedPromises should emit warnings when a function returns T | Promise<T> by @taga3s in #8495
fix(html): improved svelte parsing by @ematipico in #8555
fix(benchmark): biome commands were failing immediately during the benchmark by @mdevils in #8558
feat(noUndeclaredEnvVars): add bracket notation and Bun.env support by @tt-a1i in #8498
chore: update snapshot by @dyc3 in #8567
fix(html): parse keywords by @ematipico in #8569
perf(noRedeclare): reduce string allocations by @dyc3 in #8571
feat(biome_js_analyze): implement noReturnAssign rule by @emilyinure in #8248
fix(analyze/types): union static-member flattening by @Zaczero in #8546
chore: add more language specific (in)valid test cases by @Netail in #8589
feat(graphql_analyze): implement useUniqueVariableNames by @Netail in #8588
feat(graphql_analyze): implement useUniqueInputFieldNames by @Netail in #8592
feat(graphql_analyze): implement useUniqueFieldDefinitionNames by @Netail in #8598
feat(graphql_analyze): implement useUniqueArgumentNames by @Netail in #8591
chore: update .gitattributes by @dyc3 in #8599
feat(biome_js_analyze): port noBeforeInteractiveScriptOutsideDocument from Next.js by @taga3s in #8580
fix: changesets by @Netail in #8601
feat(analyze/html/vue): add a few more simple vue lint rules by @dyc3 in #8583
feat(analyze/html/vue): add v-bind/v-on style rules by @dyc3 in #8586
fix(types): fix bounds check in split_regex_literal by @dyc3 in #8606
chore(deps): update rust crate proc-macro2 to 1.0.104 by @renovate[bot] in #8610
chore(deps): update dependency tombi to v0.7.11 by @renovate[bot] in #8607
chore(deps): update rust crate jiff to 0.2.17 by @renovate[bot] in #8609
chore(deps): update rust crate serde_json to 1.0.148 by @renovate[bot] in #8611
chore(deps): update github-actions by @renovate[bot] in #8614
chore(deps): update typescript-eslint monorepo to v8.50.1 by @renovate[bot] in #8613
fix(biome_js_analyze): remove next/script name check for noBeforeInteractiveScriptOutsideDocument by @taga3s in #8615
fix(lint): added more test cases for variable declarations in noLeakedRender by @dibashthapa in #8537
feat: no-jsx-props-bind by @sgarcialaguna in #7410
fix(format/html): preserve whitespace between a HtmlSingleTextExpression/HtmlElement and HtmlContent by @dyc3 in #8595
docs: extra noDuplicateFields examples by @Netail in #8626
fix(format/html): add space before /> by @dyc3 in #8557
fix(plugins): normalize relative plugin paths during config loading by @JacquesLeupin in #8524
fix(cli): allow --stdin-file-path outside files.includes by @tt-a1i in #8508
chore: rust 1.92, update crates by @ematipico in #8643
chore(deps): update rust docker tag to v1.92.0 by @renovate[bot] in #8462
fix(deps): update rust crates by @renovate[bot] in #8545
feat(analyze/html/vue): add useVueVForKey by @dyc3 in #8587
feat(analyze/html/vue): add useVueVapor rule by @JacquesLeupin in #8644
chore(deps): update pnpm to v10.26.2 by @renovate[bot] in #8608
docs(lint): update documentation, rule sources for lint/complexity/noBannedTypes by @Bertie690 in #8632
refactor(analyze/json): remove dependence on biome_configuration by @dyc3 in #8634
chore: refactor some codgen to use proc macros to avoid merge conflicts for new rules by @dyc3 in #8633
docs: document Markdown aside syntax for rule documentation by @nkoji21 in #8419
fix(css-formatter): prefer breaking declaration values at top-level commas by @JacquesLeupin in #8655
ci: release by @github-actions[bot] in #8507

New Contributors

@washbin made their first contribution in #8316
@Zaczero made their first contribution in #8546
@sgarcialaguna made their first contribution in #7410
@nkoji21 made their first contribution in #8419

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.3.10...@biomejs/biome@2.3.11

biomejs/biome @biomejs/biome@2.3.11 Biome CLI v2.3.11 on GitHub