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`v9.11.0`

Features

ec30c73 feat: add "eslint/universal" to export Linter (#18883) (唯然)
c591da6 feat: Add language to types (#18917) (Nicholas C. Zakas)
492eb8f feat: limit the name given to ImportSpecifier in id-length (#18861) (Tanuj Kanti)
19c6856 feat: Add no-useless-constructor suggestion (#18799) (Jordan Thomson)
a48f8c2 feat: add type FormatterFunction, update LoadedFormatter (#18872) (Francesco Trotta)

Bug Fixes

5e5f39b fix: add missing types for no-restricted-exports rule (#18914) (Kristóf Poduszló)
8f630eb fix: add missing types for no-param-reassign options (#18906) (Kristóf Poduszló)
d715781 fix: add missing types for no-extra-boolean-cast options (#18902) (Kristóf Poduszló)
2de5742 fix: add missing types for no-misleading-character-class options (#18905) (Kristóf Poduszló)
c153084 fix: add missing types for no-implicit-coercion options (#18903) (Kristóf Poduszló)
fa11b2e fix: add missing types for no-empty-function options (#18901) (Kristóf Poduszló)
a0deed1 fix: add missing types for camelcase options (#18897) (Kristóf Poduszló)

Documentation

e4e5709 docs: correct prefer-object-has-own type definition comment (#18924) (Nitin Kumar)
91cbd18 docs: add unicode abbreviations in no-irregular-whitespace rule (#18894) (Alix Royere)
59cfc0f docs: clarify resultsMeta in LoadedFormatter type (#18881) (Milos Djermanovic)
adcc50d docs: Update README (GitHub Actions Bot)
4edac1a docs: Update README (GitHub Actions Bot)

Build Related

959d360 build: Support updates to previous major versions (#18871) (Milos Djermanovic)

Chores

ca21a64 chore: upgrade @eslint/js @9.11.0 (#18927) (Milos Djermanovic)
a10f90a chore: package.json update for @eslint/js release (Jenkins)
e4e02cc refactor: Extract processor logic into ProcessorService (#18818) (Nicholas C. Zakas)
6d4484d chore: updates for v8.57.1 release (Jenkins)
71f37c5 refactor: use optional chaining when validating config rules (#18893) (lucasrmendonca)
2c2805f chore: Add PR note to all templates (#18892) (Nicholas C. Zakas)
7b852ce refactor: use Directive class from @eslint/plugin-kit (#18884) (Milos Djermanovic)
d594ddd chore: update dependency @eslint/core to ^0.6.0 (#18863) (renovate[bot])
78b2421 chore: Update change.yml (#18882) (Nicholas C. Zakas)
a416f0a chore: enable $ExpectType comments in .ts files (#18869) (Francesco Trotta)

`v9.10.0`

`v9.9.1`

`v9.9.0`

Features

41d0206 feat: Add support for TS config files (#18134) (Arya Emami)
3a4eaf9 feat: add suggestion to require-await to remove async keyword (#18716) (Dave)

Documentation

9fe068c docs: how to author plugins with configs that extend other configs (#18753) (Alec Gibson)
48117b2 docs: add version support page in the side navbar (#18738) (Amaresh S M)
fec2951 docs: add version support page to the dropdown (#18730) (Amaresh S M)
38a0661 docs: Fix typo (#18735) (Zaina Al Habash)
3c32a9e docs: Update yarn command for creating ESLint config (#18739) (Temitope Ogunleye)
f9ac978 docs: Update README (GitHub Actions Bot)

Chores

461b2c3 chore: upgrade to @eslint/[email protected] (#18765) (Francesco Trotta)
59dba1b chore: package.json update for @eslint/js release (Jenkins)
fea8563 chore: update dependency @eslint/core to ^0.3.0 (#18724) (renovate[bot])
aac191e chore: update dependency @eslint/json to ^0.3.0 (#18760) (renovate[bot])
b97fa05 chore: update wdio dependencies for more stable tests (#18759) (Christian Bromann)

`v9.8.0`

`v9.7.0`

Features

7bd9839 feat: add support for es2025 duplicate named capturing groups (#18630) (Yosuke Ota)
1381394 feat: add regex option in no-restricted-imports (#18622) (Nitin Kumar)

Bug Fixes

14e9f81 fix: destructuring in catch clause in no-unused-vars (#18636) (Francesco Trotta)

Documentation

9f416db docs: Add Powered by Algolia label to the search. (#18633) (Amaresh S M)
c8d26cb docs: Open JS Foundation -> OpenJS Foundation (#18649) (Milos Djermanovic)
6e79ac7 docs: loadESLint does not support option cwd (#18641) (Francesco Trotta)

Chores

793b718 chore: upgrade @eslint/js @9.7.0 (#18680) (Francesco Trotta)
7ed6f9a chore: package.json update for @eslint/js release (Jenkins)
7bcda76 refactor: Add type references (#18652) (Nicholas C. Zakas)
51bf57c chore: add tech sponsors through actions (#18624) (Strek)
6320732 refactor: don't use parent property in NodeEventGenerator (#18653) (Milos Djermanovic)
9e6d640 refactor: move "Parsing error" prefix adding to Linter (#18650) (Milos Djermanovic)

`v9.6.0`

`v9.5.0`

`v9.4.0`

`v9.3.0`

`v9.2.0`

`v9.1.1`

`v9.1.0`

`v9.0.0`

`v8.57.1`

lint-staged/lint-staged (lint-staged)

`v15.2.10`

Patch Changes

#1471 e3f283b Thanks @iiroj! - Update minor dependencies, including micromatch@~4.0.8.

`v15.2.9`

Patch Changes

#1463 b69ce2d Thanks @iiroj! - Set the maximum number of event listeners to the number of tasks. This should silence the console warning MaxListenersExceededWarning: Possible EventEmitter memory leak detected.

`v15.2.8`

Patch Changes

f0480f0 Thanks @iiroj! - In the previous version the native git rev-parse --show-toplevel command was taken into use for resolving the current git repo root. This version switched the --show-toplevel flag with --show-cdup, because on Git installed via MSYS2 the former was returning absolute paths that do not work with Node.js child_process. The new flag returns a path relative to the working directory, avoiding the issue.

The GitHub Actions workflow has been updated to install Git via MSYS2, to ensure better future compatibility; using the default Git binary in the GitHub Actions runner was working correctly even with MSYS2.

`v15.2.7`

Patch Changes

#1440 a51be80 Thanks @iiroj! - In the previous version the native git rev-parse --show-toplevel command was taken into use for resolving the current git repo root. This version drops the --path-format=absolute option to support earlier git versions since it's also the default behavior. If you are still having trouble, please try upgrading git to the latest version.

`v15.2.6`

Patch Changes

#1433 119adb2 Thanks @iiroj! - Use native "git rev-parse" commands to determine git repo root directory and the .git config directory, instead of using custom logic. This hopefully makes path resolution more robust on non-POSIX systems.

`v15.2.5`

Patch Changes

#1424 31a1f95 Thanks @iiroj! - Allow approximately equivalent versions of direct dependencies by using the "~" character in the version ranges. This means a more recent patch version of a dependency is allowed if available.
#1423 91abea0 Thanks @iiroj! - Improve error logging when failing to read or parse a configuration file
#1424 ee43f15 Thanks @iiroj! - Upgrade [email protected]

`v15.2.4`

Patch Changes

4f4537a Thanks @iiroj! - Fix release issue with previous version; update dependencies

`v15.2.2`

Patch Changes

#1391 fdcdad4 Thanks @iiroj! - Lint-staged no longer tries to load configuration from files that are not checked out. This might happen when using sparse-checkout.

`v15.2.1`

Patch Changes

#1387 e4023f6 Thanks @iiroj! - Ignore stdin of spawned commands so that they don't get stuck waiting. Until now, lint-staged has used the default settings to spawn linter commands. This means the stdin of the spawned commands has accepted input, and essentially gotten stuck waiting. Now the stdin is ignored and commands will no longer get stuck. If you relied on this behavior, please open a new issue and describe how; the behavior has not been intended.

`v15.2.0`

Minor Changes

#1371 f3378be Thanks @iiroj! - Using the --no-stash flag no longer discards all unstaged changes to partially staged files, which resulted in inadvertent data loss. This fix is available with a new flag --no-hide-partially-staged that is automatically enabled when --no-stash is used.

Patch Changes

#1362 17bc480 Thanks @antonk52! - update [email protected]
#1368 7c55ca9 Thanks @iiroj! - Update most dependencies
#1368 777d4e9 Thanks @iiroj! - To improve performance, only use lilconfig when searching for config files outside the git repo. In the regular case, lint-staged finds the config files from the Git index and loads them directly.
#1373 85eb0dd Thanks @iiroj! - When determining git directory, use fs.realpath() only for symlinks. It looks like fs.realpath() changes some Windows mapped network filepaths unexpectedly, causing issues.

`v15.1.0`

Minor Changes

#1344 0423311 Thanks @danielbayley! - Add support for loading configuration from package.yaml and package.yml files, supported by pnpm.

Patch Changes

#1355 105d901 Thanks @iiroj! - Suppress some warnings when using the "--quiet" flag

`v15.0.2`

Patch Changes

#1339 8e82364 Thanks @iiroj! - Update dependencies, including listr2@7.0.2 to fix an upstream issue affecting lint-staged.

`v15.0.1`

Patch Changes

#1217 d2e6f8b Thanks @louneskmt! - Previously it was possible for a function task to mutate the list of staged files passed to the function, and accidentally affect the generation of other tasks. This is now fixed by passing a copy of the original file list instead.

`v15.0.0`

Major Changes

#1322 66b93aa Thanks @iiroj! - Require at least Node.js 18.12.0

This release drops support for Node.js 16, which is EOL after 2023-09-11.
Please upgrade your Node.js to the latest version.

Additionally, all dependencies have been updated to their latest versions.

`v14.0.1`

Bug Fixes

fix reading config from stdin, introduced in v14.0.0 (#1317) (fc3bfea)

`v14.0.0`

Features

drop support for Node.js 14 (#1312) (9da8777)

BREAKING CHANGES

Please upgrade your Node.js version to at least 16.14.0.

prettier/prettier (prettier)

`v3.4.1`

Remove unnecessary parentheses around assignment in `v-on` (#16887 by @fisker)

<!-- Input -->
<template>
  <button @&#8203;click="foo += 2">Click</button>
</template>

<!-- Prettier 3.4.0 -->
<template>
  <button @&#8203;click="(foo += 2)">Click</button>
</template>

<!-- Prettier 3.4.1 -->
<template>
  <button @&#8203;click="foo += 2">Click</button>
</template>

`v3.4.0`

`v3.3.3`

Add parentheses for nullish coalescing in ternary (#16391 by @cdignam-segment)

This change adds clarity to operator precedence.

// Input
foo ? bar ?? foo : baz;
foo ?? bar ? a : b;
a ? b : foo ?? bar;

// Prettier 3.3.2
foo ? bar ?? foo : baz;
foo ?? bar ? a : b;
a ? b : foo ?? bar;

// Prettier 3.3.3
foo ? (bar ?? foo) : baz;
(foo ?? bar) ? a : b;
a ? b : (foo ?? bar);

Add parentheses for decorator expressions (#16458 by @y-schneider)

Prevent parentheses around member expressions or tagged template literals from being removed to follow the stricter parsing rules of TypeScript 5.5.

// Input
@&#8203;(foo`tagged template`)
class X {}

// Prettier 3.3.2
@&#8203;foo`tagged template`
class X {}

// Prettier 3.3.3
@&#8203;(foo`tagged template`)
class X {}

Support `@let` declaration syntax (#16474 by @sosukesuzuki)

Adds support for Angular v18 @let declaration syntax.

Please see the following code example. The @let declaration allows you to define local variables within the template:

@&#8203;let name = 'Frodo';

<h1>Dashboard for {{name}}</h1>
Hello, {{name}}

For more details, please refer to the excellent blog post by the Angular Team: Introducing @let in Angular.

We also appreciate the Angular Team for kindly answering our questions to implement this feature.

`v3.3.2`

Fix handlebars path expressions starts with `@` (#16358 by @Princeyadav05)

{{! Input }}
<div>{{@&#8203;x.y.z}}</div>

{{! Prettier 3.3.1 }}
<div>{{@&#8203;x}}</div>

{{! Prettier 3.3.2 }}
<div>{{@&#8203;x.y.z}}</div>

`v3.3.1`

Preserve empty lines in front matter (#16347 by @fisker)

<!-- Input -->
---
foo:
  - bar1

  - bar2

  - bar3
---
Markdown

<!-- Prettier 3.3.0 -->

---
foo:
  - bar1
  - bar2
  - bar3
---

Markdown

<!-- Prettier 3.3.1 -->
---
foo:
  - bar1

  - bar2

  - bar3
---

Markdown

Preserve explicit language in front matter (#16348 by @fisker)

<!-- Input -->
---yaml
title: Hello
slug: home
---

<!-- Prettier 3.3.0 -->
---
title: Hello
slug: home
---

<!-- Prettier 3.3.1 -->
---yaml
title: Hello
slug: home
---

Avoid line breaks in import attributes (#16349 by @fisker)

// Input
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type: "json" };

// Prettier 3.3.0
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type:
  "json" };

// Prettier 3.3.1
import something from "./some-very-very-very-very-very-very-very-very-long-path.json" with { type: "json" };

`v3.3.0`

`v3.2.5`

Support Angular inline styles as single template literal (#15968 by @sosukesuzuki)

Angular v17 supports single string inline styles.

// Input
@&#8203;Component({
  template: `<div>...</div>`,
  styles: `h1 { color: blue; }`,
})
export class AppComponent {}

// Prettier 3.2.4
@&#8203;Component({
  template: `<div>...</div>`,
  styles: `h1 { color: blue; }`,
})
export class AppComponent {}

// Prettier 3.2.5
@&#8203;Component({
  template: `<div>...</div>`,
  styles: `
    h1 {
      color: blue;
    }
  `,
})
export class AppComponent {}

Unexpected embedded formatting for Angular template (#15969 by @JounQin)

Computed template should not be considered as Angular component template

// Input
const template = "foobar";

@&#8203;Component({
  [template]: `<h1>{{       hello }}</h1>`,
})
export class AppComponent {}

// Prettier 3.2.4
const template = "foobar";

@&#8203;Component({
  [template]: `<h1>{{ hello }}</h1>`,
})
export class AppComponent {}

// Prettier 3.2.5
const template = "foobar";

@&#8203;Component({
  [template]: `<h1>{{       hello }}</h1>`,
})
export class AppComponent {}

Use `"json"` parser for `tsconfig.json` by default (#16012 by @sosukesuzuki)

In v2.3.0, we introduced "jsonc" parser which adds trialing comma by default.

When adding a new parser we also define how it will be used based on the linguist-languages data.

tsconfig.json is a special file used by TypeScript, it uses .json file extension, but it actually uses the JSON with Comments syntax. However, we found that there are many third-party tools not recognize it correctly because of the confusing .json file extension.

We decide to treat it as a JSON file for now to avoid the extra configuration step.

To keep using the "jsonc" parser for your tsconfig.json files, add the following to your .pretterrc file

{
  "overrides": [
    {
      "files": ["tsconfig.json", "jsconfig.json"],
      "options": {
        "parser": "jsonc"
      }
    }
  ]
}

`v3.2.4`

Fix incorrect parser inference (#15947 by @fisker)

Files like .eslintrc.json were incorrectly formatted as JSONC files.

// Input
prettier --file-info .eslintrc.json
{ "ignored": false, "inferredParser": "jsonc" }

// Prettier 3.2.4
prettier --file-info .eslintrc.json
{ "ignored": false, "inferredParser": "json" }

`v3.2.3`

Throw errors for invalid code (#15881 by @fisker, @Josh-Cena, @auvred)

// Input
1++;

// Prettier 3.2.2
1++;

// Prettier 3.2.3
SyntaxError: Invalid left-hand side expression in unary operation (1:1)
> 1 | 1++;
    | ^

// Input
try {} catch (error = 1){}

// Prettier 3.2.2
try {
} catch (error) {}

// Prettier 3.2.3
SyntaxError: Catch clause variable cannot have an initializer. (1:23)
> 1 | try {} catch (error = 1){}
    |                       ^

Fix parser inference (#15927 by @fisker)

// Prettier 3.2.2
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "json" }

// Prettier 3.2.3
prettier --file-info tsconfig.json
{ "ignored": false, "inferredParser": "jsonc" }

`v3.2.2`

Fix crash when parsing template literal CSS in a JSX style tag using a spread attribute (#15896 by @eelco)

For example this code would crash before:

<style {...spread}>{`.{}`}</style>

Fix formatting error on optional call expression and member chain (#15920 by @sosukesuzuki)

// Input
a(() => {}, c?.d());

// Prettier 3.2.1
TypeError: Cannot read properties of undefined (reading 'type')

// Prettier 3.2.2
a(() => {}, c?.d());

`v3.2.1`

Fix formatting error on member chain (#15915 by @sosukesuzuki)

// Input
test().test2().test2(thing?.something);

// Prettier 3.2.0
TypeError: Cannot read properties of undefined (reading 'type')

// Prettier 3.2.1
test().test2().test2(thing?.something);

`v3.2.0`

`v3.1.1`

Fix config file search (#15363 by @fisker)

Previously, we start search for config files from the filePath as a directory, if it happened to be a directory and contains config file, it will be used by mistake.

├─ .prettierrc
└─ test.js         (A directory)
  └─ .prettierrc

// Prettier 3.1.0
await prettier.resolveConfigFile(new URL("./test.js", import.meta.url));
// <CWD>/test.js/.prettierrc

// Prettier 3.1.1
await prettier.resolveConfigFile(new URL("./test.js", import.meta.url));
// <CWD>/.prettierrc

Skip explicitly passed symbolic links with `--no-error-on-unmatched-pattern` (#15533 by @sanmai-NL)

Since Prettier v3, we stopped following symbolic links, however in some use cases, the symbolic link patterns can't be filtered out, and there is no way to prevent Prettier from throwing errors.

In Prettier 3.1.1, you can use --no-error-on-unmatched-pattern to simply skip symbolic links.

Consistently use tabs in ternaries when `useTabs` is `true` (#15662 by @auvred)

// Input
aaaaaaaaaaaaaaa
	? bbbbbbbbbbbbbbbbbb
	: ccccccccccccccc
	  ? ddddddddddddddd
	  : eeeeeeeeeeeeeee
	    ? fffffffffffffff
	    : gggggggggggggggg;

// Prettier 3.1.0
aaaaaaaaaaaaaaa
	? bbbbbbbbbbbbbbbbbb
	: ccccccccccccccc
	  ? ddddddddddddddd
	  : eeeeeeeeeeeeeee
	    ? fffffffffffffff
	    : gggggggggggggggg;

// Prettier 3.1.1
aaaaaaaaaaaaaaa
	? bbbbbbbbbbbbbbbbbb
	: ccccccccccccccc
		? ddddddddddddddd
		: eeeeeeeeeeeeeee
			? fffffffffffffff
			: gggggggggggggggg;

Improve config file search (#15663 by @fisker)

The Prettier config file search performance has been improved by more effective cache strategy.

Fix unstable and ugly formatting for comments in destructuring patterns (#15708 by @sosukesuzuki)

// Input
const {
  foo,
  // bar
  // baz
}: Foo = expr;

// Prettier 3.1.0
const {
  foo1,
} // bar
// baz
: Foo = expr;

// Prettier 3.1.0 second output
const {
  foo1, // bar
} // baz
: Foo = expr;

// Prettier 3.1.1
const {
  foo1,
  // bar
  // baz
}: Foo = expr;

Support "Import Attributes" (#15718 by @fisker)

TypeScript 5.3 supports the latest updates to the import attributes proposal.

import something from "./something.json" with { type: "json" };

Fix false claim in docs that cursorOffset is incompatible with rangeStart/rangeEnd (#15750 by @ExplodingCabbage)

The cursorOffset option has in fact been compatible with rangeStart/rangeEnd for over 5 years, thanks to work by @ds300. However, Prettier's documentation (including the CLI --help text) continued to claim otherwise, falsely. The documentation is now fixed.

Keep curly braces and `from` keyword in empty `import` statements (#15756 by @fisker)

// Input
import { } from 'foo';
import { /* comment */ } from 'bar';

// Prettier 3.1.0
import {} from "foo";
import /* comment */ "bar";

// Prettier 3.1.1
import {} from "foo";
import {} from /* comment */ "bar";

Keep empty import attributes and assertions (#15757 by @fisker)

// Input
import foo from "foo" with {};
import bar from "bar" assert {};

// Prettier 3.1.0
import foo from "foo";
import bar from "bar";

// Prettier 3.1.1
import foo from "foo" with {};
import bar from "bar" assert {};

`v3.1.0`

`v3.0.3`

Add `preferUnplugged: true` to `package.json` (#15169 by @fisker and @so1ve)

Prettier v3 uses dynamic imports, user will need to unplug Prettier when Yarn's PnP mode is enabled, add preferUnplugged: true to package.json, so Yarn will install Prettier as unplug by default.

Support shared config that forbids `require()` (#15233 by @fisker)

If an external shared config package is used, and the package exports don't have require or default export.

In Prettier 3.0.2 Prettier fails when attempt to require() the package, and throws an error.

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" main defined in <packageName>/package.json

Allow argument of `require()` to break (#15256 by @fisker)

// Input
const plugin = require(
  global.STANDALONE
    ? path.join(__dirname, "../standalone.js")
    : path.join(__dirname, "..")
);

// Prettier 3.0.2
const plugin = require(global.STANDALONE
  ? path.join(__dirname, "../standalone.js")
  : path.join(__dirname, ".."));

// Prettier 3.0.3
const plugin = require(
  global.STANDALONE
    ? path.join(__dirname, "../standalone.js")
    : path.join(__dirname, "..")
);

Do not print trailing commas in arrow function type parameter lists in `ts` code blocks (#15286 by @sosukesuzuki)

<!-- Input -->
```ts
const foo = <T>() => {}
```

<!-- Prettier 3.0.2 -->
```ts
const foo = <T,>() => {}
```

<!-- Prettier 3.0.3 -->
```ts
const foo = <T>() => {}
```

Support TypeScript 5.2 `using` / `await using` declaration (#15321 by @sosukesuzuki)

Support for the upcoming Explicit Resource Management feature in ECMAScript. using / await using declaration

{
   using foo = new Foo();
   await using bar = new Bar();
}

`v3.0.2`