ESLint

Summary

Added handling for underflow without loss of precision and introduced checkConditionalExpressions to avoid unmodified loop conditions.

Summary

Fixed ASI hazard handling and false positives in various linting rules (e.g., no unused labels, getters, and unused vars).

Summary

Export ConfigObject from eslint/config to enable external usage.

Summary

Add new rule options: errorClassNames, maxNestedCallbacks, computed Number.parseInt member access, suggestions for no‑compare‑neg‑zero, and invalid signed numeric radix validation in radix rule

Summary

Fix handling of unavailable require cache (backport)

Summary

Added Symbol() and BigInt() detection plus relational comparison checks to the no‑constant‑binary‑expression rule

Summary

Add correct stack tracking and detailed reporting for max nested callbacks, lines per function, and depth violations including keyword handling

Summary

Fixed multiple bugs including eslint plugin version update, delegated command failure propagation, arrow callback autofix, and missing CodePath types

Summary

- Added sequence‑expression checks for for‑loops and introduced includeIgnoreFile() to ESLint config APIs.

Summary

Add suggestion rule for detecting unused private class members

Summary

Fixed several bugs in code path analysis, async promise executor detection, and validation error messages; updated eslint and improved test coverage for services and rule metadata

Summary

- Added meta.languages support to linting rules and introduced Temporal handling for no‑object calls and ES2026 globals.

Summary

Added API support for bulk suppressions and applied a fix for missing var handling in TSModuleBlock.

Summary

Updated ESLint to the latest version and refreshed related plugins and config settings

Summary

Updated dependencies (minimatch, @eslint/eslintrc, ajv) and applied security patches for known vulnerabilities.

Summary

Updated AJV to 6.14.0 to patch security vulnerabilities

Summary

Updated ESLint and related dependencies, addressing a security vulnerability in minimatch.

Summary

Fix restores TypeScript 4.0 compatibility in type definitions

Summary

Breaking changes: removed deprecated APIs, dropped jiti <2.2.0, eliminated .eslintrc support, required Node.js ^20.19.0/^22.13.0, and removed inactive flags.

Summary

Fix: warn when eslint environment configuration comments are found.

Summary

Fixed JS language visitor to only receive node argument.

Summary

Improved error location reporting for duplicate class members, for-direction arguments, and refined the complexity rule to only highlight static block headers.

Summary

Added two new features: refined the complexity rule to highlight only function headers and fixed false positives for loss‑of‑precision with scientific notation.

Summary

Added support to preserve caught errors with static "cause" keys and to handle TypeScript syntax in no-restricted-imports.

Summary

Added proper handling for preserve caught error edge cases and corrected rule option typings

Summary

Add suggestions for no‑empty function and static block rules and introduce a preserve‑caught‑error rule

Summary

Added multithreaded linting support and integrated eslint-plugin‑regexp into the base ESLint config.

Summary

Added global object access detection to no-restricted-globals and support for explicit resource management in a single variable.

Summary

Added explicit resource management support in core rules and TypeScript types in accessor rules.

Summary

Added explicit resource management support for no‑loop functions, no‑undef init, init declarations, and no‑const assign, plus full actual location output in rule tester.

Summary

Fixed import handling to allow separate default and named type imports.

Summary

Added support for `basePath` in config objects, new `allowSeparateTypeImports` option, and error handling for negative column indices.

Summary

Added ECMA 2026 support with `using`/`await using`, ES2025 globals, auto‑accessor fields for class methods, and new rule options (global type declarations, ignore type annotations, `allowProperties`, `sourceCode.isGlobalReference`).

Summary

Added TypeScript syntax support to several rules (no‑use‑before‑define, no‑shadow, no‑magic‑numbers, prefer‑arrow‑callback, func‑style overload handling) and introduced allowTypeAnnotation option.

Summary

Added new linting capabilities: ENV‑based ESLint flags, external MCP server, `allowRegexCharacters`, `no-unassigned-vars`, autofix for array constructor, and TypeScript syntax support in `max-params`.

Summary

Add reportGlobalThis to no‑shadow restricted names, new suggestions for the eqeqeq rule, and an ignoreDirectives option for no‑unused‑expressions; introduce MCP server support.

Summary

Fixed regression in `no-unused-expressions` rule related to directive detection

Summary

Added TypeScript syntax support to multiple ESLint rules (no‑empty‑function, no‑unused‑expressions, no‑invalid‑this, no‑loop‑func) plus new JSRuleDefinition type and allowObjects option for no‑restricted‑properties.

Summary

Added extensive TypeScript support across several rules (init declarations, no‑dupe‑class‑members, no‑loss‑of‑precision, no‑array‑constructor) and experimental strip‑types loading

Summary

Added TypeScript syntax support for various rules and enabled flat config prefix in defineConfig()

Summary

Exported `defineConfig` and `globalIgnores` API

Summary

Added new deprecated rule types and an `--ext` CLI option.

Summary

Fixed RuleContext type definition to resolve issue #19417.

Summary

Added new behavior for inactive flags

Summary

Add a new feature to report unused inline ESLint configurations.

Summary

Added features: report allowed methods for no-console rule, unflag TypeScript config files, and check imports/class names for no-shadow restricted names.

Summary

Added suggestions to the no‑unused‑vars rule.

Summary

Added `ignoreComputedKeys` option (with type) to the sort keys rule.

Summary

Implemented Language.normalizeLanguageOptions and added meta.defaultOptions and meta object support to ESLint core and @eslint/js plugin.

Summary

Added support for Import Attributes and RegExp Modifiers and introduced TypeScript typings for the @eslint/js package

Summary

Added defaultLanguageOptions for languages, improved ESLint config warnings, exported ESLint.defaultConfig, and dropped support for jiti v1.21 (breaking change).

Summary

Added new features: jiti v2 support, test case hooks, alternate config lookup, and enhanced cyclomatic complexity calculation.

Summary

Added missing TypeScript types for several ESLint rules and updated dependencies (@eslint/core, @types/estree, @types/json-schema).

Summary

Added new ESLint universal export, language typings, import specifier name length limit, no‑useless‑constructor rule, and FormatterFunction type enhancements.

Summary

Fixed various linting issues: duplicate file linting, handling of fixTypes, global name conflicts, nullish config errors, and filesystem walk crashes.

Summary

Added TypeScript types and new regexp rule options (requireFlag, duplicate flag detection and messages)

Summary

Fixed lintText() to correctly handle fixTypes.

Summary

Added support for TypeScript config files and a suggestion to require await to remove async keyword.

Summary

Added SourceCode.getLoc/getRange API for enhanced source location handling.

Summary

Added support for ES2025 duplicate named capturing groups and a regex option in the no-restricted-imports rule.

Summary

Add feature flags and support for `ecmaVersion: 2025` with duplicate named capturing groups.

Summary

Added feature to suppress sparse array reports on commas rather than the whole array.

Summary

Added support to ignore IIFE's in the no-loop-func rule

Summary

Added new rule options (overrides.namedExports, restrictedNamedExportsPattern, allowEscape, enforceForInnerExpressions)

Summary

Added suggestion support for case‑declaration statements and improved Unicode letter detection in the capitalized‑comments rule

Summary

Fixed bug where ESLint configuration used an outdated @eslint/create version.

Summary

Add helpful error messages for nullish configs and replace graphemer with Intl.Segmenter; extend ESLint globals with Intl and improve rule handling (allow while(true) in no‑constant‑condition)

Summary

Flat config becomes the default: ESLint is renamed from FlatESLint, string config support and many formatters are removed, and new APIs like loadESLint() are added.

Summary

Added loadESLint() API and enabled eslint.config.mjs/.cjs files for v8

Summary

Added support for custom severity when reporting unused eslint-disable directives

Summary

Add importNamePattern option to the no-restricted-imports rule.

Summary

Add new checks for direction rule conditions and suggestions for no-console, plus update array constructor rule.

Summary

Deprecate formatting rules and introduce suggestions for disallowing prototype-builtins.

Summary

Add feature to report unused eslint disable/enable directives.

Summary

Added new CLI option `--no-warn-ignored` for flat config and enhanced logical assignment operator handling to report three‑operand expressions.

Summary

Added array‑callback suggestions, allowVoid option, new no‑object‑constructor rule (deprecating no‑new‑object), and implemented SourceCode.applyInlineConfig with flat rule tester default config handling.

Summary

Add new AST node callbacks onUnreachableCodePathStart/End for advanced unreachable code handling.

Summary

Added features: corrected update direction handling, RuleTester no longer creates empty test suites, and void type support in the no‑promise‑executor‑return rule.

Summary

Updated regex for methods with thisArg (feature).

Summary

Add extensive "v" flag support for regex rules (unicode, useless escape, empty character class, control regex, misleading class, spaces, backreference, invalid regexp, named capture groups, regex literals)

Summary

Expose LegacyESLint in the unsupported API and improve the indent rule for else‑if statements

Summary

Added ES2023/ES2024 environments, ecmaVersion 2024 support, regexp v‑flag parsing, and a new ternaryOperandBinaryExpressions option for the no-extra-parens rule.

Summary

Added directive prologue detection with autofix, block‑scoped var location in messages, and a skipJSXText option for the no‑irregular‑whitespace rule.

Summary

Implement correct handling of "no useless return" within try statements.

Summary

Feature: default ignore pattern now excludes /node_modules/ in flat config and adds shouldUseFlatConfig flag.

Summary

Added new FlatESLint API: findConfigFile() method and enriched rule context with sourceCode, filename, physicalFilename, and cwd properties.

Summary

Added SourceCode.markVariableAsUsed() method for better variable usage tracking.

Summary

Moved `getDeclaredVariables` and `getAncestors` to the SourceCode API.

Summary

Added Unicode regex suggestions, flat config serialization via plugin metadata, and enforced languageOptions.parser as an object

Summary

Added checkJSDoc option to multiline comment style, enabled serialization of parsers/processors in flat config, and switched to @eslint community dependencies.

Summary

Added `afterHashbangComment` option and expanded `no-constant-binary-expression` rule to cover nullish coalescing cases

Summary

Adds support for array callback return values in `Array.prototype.toSorted`.

Summary

Added a new `restrictDefaultExports` option to the `no-restricted-exports` rule.

Summary

Added suggestions for redundant wrapping in the prefer-regex-literals rule.

Summary

Add new options to the no‑underscore‑dangle rule for assignment patterns and destructuring

Summary

Introduce suggestion for missing return await and update global definitions

Summary

Added allowParensAfterCommentPattern option to no‑extra‑parens rule and enhanced regex handling with named capture groups and flag validation for non‑literal patterns.

Summary

Added features: ignoreClassFieldInitialValues option for no‑magic‑numbers, multiline property alignment in key‑spacing, and Intl support in no‑obj‑calls.

Summary

Added new linting rules: no-new-native-nonconstructor, no-empty-static-block, comment suggestion for empty BlockStatement, and support for context.languageOptions.ecmaVersion in core rules.

Summary

Added flat‑config support via ESLINT_USE_FLAT_CONFIG env, custom globbing replacement, and getter Object.create() checks

Summary

Added max warnings option to formatters, removed ignore file support in FlatESLint, and updated ID length calculation to count graphemes.

Summary

Added support for sourceType "commonjs" in the strict rule, introduced a rule for logical assignment operators, and enhanced array callback return handling for findLast/findLastIndex.

Summary

Fixed eslint plugin redefinition, improved autofix for prefer‑const, and corrected glob pattern handling.

Summary

Added CLI support for eslint.config.js lookup

Summary

Implemented caching for FlatESLint and added a methodsIgnorePattern option to the object shorthand rule.

Summary

Added FlatESLint support, improved key spacing calculations, and a new allowLineSeparatedGroups option for sort‑keys.

Summary

Added a feature to catch preprocess errors

Summary

Added importNames support for patterns in the no-restricted-imports rule and improved handling of blockless `with` statements in the indent rule

Summary

Added performance report enhancement to account for rule creation time.

Summary

Added an `allowNamedExports` option to the no‑use‑before‑define rule and fixed the indent‑bug for semicolon‑first style

Summary

Added Unicode handling features: flag suggestion in no‑misleading‑character‑class, code‑point escape checks in no‑control‑regex, and updated global‑variables rule.

Summary

Add `enforceInClassFields` option to the no‑underscore‑dangle rule.

Summary

Add new `no-constant-binary-expression` rule

Summary

Updated arrow function handling to avoid eval logic for `this` (feature).

Summary

Fixed logic for handling top-level `this` in the “no invalid this and no eval” rule.

Summary

Add new linting options and rule enhancements: destructuredArrayIgnorePattern, catch undefined/Boolean in no-constant-condition, always ban undefined in valid typeof, and include ESLint favicon in HTML reports

Summary

Add ignoreOnInitialization option to the no‑shadow rule and onlyOneSimpleParam option to the no‑confusing‑arrow rule; debug prints now show file‑parse time

Summary

Added new ES2016, ES2018, ES2019, and ES2022 environments and updated eslint scope handling for ES3 'use strict' directives.

Summary

Implemented RFC 2021 suppression support as a new feature.

Summary

Added support for arbitrary module namespace names in many linting rules (camelcase, quotes, keyword-spacing, no-restricted-imports/exports, etc.) and improved no-restricted-imports casing handling.

Summary

Added support for logical assignment in the no-self-assign rule, multi‑line eslint‑disable‑next‑line comments, and fixed false‑negative detection for onlyDeclarations + properties matches.

Summary

Add suggestions support for prefer-regex-literals and introduce a new prefer-object-has-own rule

Summary

Fix regression in max lines per function handling of reported locations

Summary

Added new parser and linter features such as the allowReserved option, flat config support, async formatters, and cwd handling for formatters

Summary

Introduced allowProperties option for atomic updates and added private "#in" syntax support.

Summary

Add reporting of class evaluation TDZ errors for the no‑use‑before‑define rule.

Summary

Added new rule for unused private class members and introduced a name field to RuleTester.

Summary

Upgrade @eslint/eslintrc to v1.0.3 to address a Jest workaround.

Summary

Adds extensive class fields support: new rule options, updates to existing rules (complexity, no‑undef, no‑unused‑vars, etc.), and parser enhancements for class fields and class‑related syntax.

Summary

Added a new "Exit on fatal error" feature for improved error handling.

Summary

Upgrade @eslint/eslintrc to v0.4.3

Summary

Added support for "latest" ecmaVersion and introduced FlatConfigArray implementation, expanding configuration options.

Summary

Added RuleTester‑only mode and new getRulesMetaForResults() API to ESLint.

Summary

Upgraded key dependencies: @eslint/eslintrc to 0.4.2, updated glob parent version, and refreshed the ESLint plugin.

Summary

Merged HTML formatter files into a single html.js and removed lodash dependency

Summary

Added automated suggestion for radix rule parsing decimals and included XO style guide in ESLint init.

Summary

Fixed highlighting of the last write reference in the no‑unused‑vars rule and improved linting of code blocks sharing extensions but different content.

Summary

Added new linting options: `disallowTemplateShorthand` and `ignoreNonDeclaration` for relevant rules.

Summary

Introduce `allowInParentheses` option to the `no-sequences` rule

Summary

Updated documentation for the indent rule, clarified triage process, removed an extraneous dash, and fixed README formatting.

Summary

Added cacheStrategy feature to customize caching behavior

Summary

Update documentation: fix sibling selector descriptions, add triage process details, and expand bug report template fields.

Summary

Upgrade @eslint/eslintrc and bump lodash to address a security issue.

Summary

Added autofix to the multiline ternary rule and enhanced checks for logical assignments and regex ecmaVersion defaults.

Summary

Fix multiple false positive/negative detection bugs for NewExpression, await, unary expressions, and exponentiation operator

Summary

Added a new “no unsafe optional chaining” rule.

Summary

Fixed skip option handling in no-irregular-whitespace and corrected a crash with bodyless constructors.

Summary

Added configurable list size for per‑rule performance metrics

Summary

Upgrade @eslint/eslintrc to resolve rule schema validation errors.

Summary

Fixed multiple autofix and rule errors including yoda rule, destructuring, template literals, && short‑circuiting, and keyword checks before blocks

Summary

Added support for async arrow functions in function‑paren newline handling (new feature).

Summary

Clarify and expand documentation for ignorePattern and other guides, fixing typos, grammatical errors, missing quotes, and package.json requirements

Summary

Fixed multiple lint rule bugs: corrected notice for invalid plugin names, prevented comment loss with destructuring, fixed NonOctalDecimalIntegerLiteral handling, and resolved false‑negative id length checks on Object.prototype properties.

Summary

Updated @eslint/eslintrc to a working version, fixing issues #13641 and #13647.

Summary

Added support for logical assignment operators in code path analysis and core rules

Summary

Added `allowFunctionParams` option to the `no-underscore-dangle` rule (fixes #12579).

Summary

Require meta for fixable rules in RuleTester and improve duplicate case detection logic.

Summary

Add optional chaining support to the parser

Summary

Added new "ignoreGlobals" option to the camelcase rule and improved reporting for arrow body style, array callbacks, and regex literals.

Summary

Replace Infinity with Number.MAX_SAFE_INTEGER to resolve issue #13427

Summary

Added new linting rules: no-promise-executor-return and no-unreachable-loop.

Summary

Added enforceForFunctionPrototypeMethods option and extended language support (nullish coalescing, import.meta, export‑as‑ns, ES2020 environment).

Summary

Fix numerous location and reporting bugs across AST utilities, block spacing, arrow functions, rest/spread, linebreak style, and false‑positive detections

Summary

Breaking changes include upgrading to espree@7.0.0, revamping plugin resolution, config path handling, RuleTester behavior, default‑true class/computed‑property spacing, and adding new rules to eslint:recommended.

Summary

Added new rule options such as no‑error‑on‑unmatched‑pattern flag, suggestions for no‑unsafe‑negation, and enabled prefer‑regex‑literals across the codebase.

Summary

Fixed token spacing detection in JSXText and prevented entry directories from being ignored.

Summary

Reverted key spacing changes to fix regression (issue 12598).

Summary

Add a suite of new linting rules and the suggestions API, including grouped accessor pairs, no‑constructor‑return, no‑dupe‑else‑if, no‑setter‑return, prefer‑exponentiation, and enhanced camelcase options.

Summary

Fixed false positives/negatives and improved report locations for rules like no‑trailing‑spaces, no‑tabs, no‑mixed‑operators, etc.

Summary

Fix typo in documentation for 'no magic numbers' (issue 12345).

Summary

- Added enforceForSwitchCase option to isnan rule, new --env-info CLI flag, and JSXFragments support in indent rule.

Summary

Added new linting rules: no-import-assign, prefer-regex-literals, and default-param-last.

Summary

Added support for `reportUnusedDisableDirectives` and TypeScript in the ESLint config initializer.

Summary

Upgrade espree to ^6.1.1

Summary

Upgrade eslint utils to 1.4.2

Summary

Add bigint and dynamic import support, and introduce a new `noInlineConfig` setting

Summary

Upgrade core dependencies (eslint‑scope, lodash, other deps) and add v8 compile cache for faster startup

Summary

Fixed the broken `rulesdir` option.

Summary

Upgrade core dependencies: espree@6.0.0, sinon, and @babel/polyfill to core-js v3.

Summary

Added support for passing rule metadata to formatters and updated HTML formatter to handle missing metadata.

Summary

Fix comment placement when using implicit arrow linebreaks (issues #11521, #11522).

Summary

Fix several bugs including implicit arrow linebreak handling, empty glob pattern expansion, and multiple documentation errors

Summary

Bundle the espree parser in the build, addressing eslint/eslint.github.io issue #546.

Summary

Added new core rule “prefer named capture group” and switched the build system from Browserify to Webpack, removing path.resolve usage.

Summary

Fix error thrown when sorting keys on SpreadElement objects

Summary

Added `allowSingleLineBlocks` option to the padded‑blocks rule.

Summary

Added ability to disable/configure globals using string identifiers (new feature).

Summary

Enabled meta.messages usage in some linting rules.

Summary

Added ability to ignore declaration sorting in sort‑imports (feature)

Summary

Fixed handling of optional catch bindings in the no‑useless‑catch rule.

Summary

Add "first" option for VariableDeclarator indentation and eliminate useless catch rule

Summary

Upgrade core dependencies (Espree v5.0.0, eslint release@1.2.0) and refactor rule detection logic.

Summary

Added `ignoreDestructuring` option to the id‑match rule and a new `--fix-type` CLI flag for selective fixing.

Summary

Added Linter.version API.

Summary

Added new linting options (iife padding line, allowIndentationTabs, camelcase ignoreList) and upgraded table dependency to v5

Summary

Fixed multiple bugs including exponential require traversal, separateRequires in consecutive mode, duplicate crash error messages, and test failures on master.

Summary

Added a generators option to function names.

Summary

Fixed camelcase duplicate warning bug

Summary

Updated documentation links and fixed broken jscs URLs

Summary

Added new linting rules: unicode regexp, no misleading character class, no async promise executor, and require atomic updates.

Summary

Fixed linting cache handling and related Linter bugs, including redundant checks and Object.assign usage.

Summary

Fixed multiple linting rule bugs, including object spread handling, regex wrapping, sorting keys with spreads, const rule on array destructuring, nested unknown operators, and removed the autofixer for no-debugger.

Summary

Fix JSDoc validation to allow optional return types for async functions.

Summary

Added new max‑lines‑per‑function rule (fixes #9842)

Summary

Fixed invalid regexp handling for flag variables and corrected object curly newline minProperties with default export.

Summary

Added consecutive option for a single variable and ensured nodes inherit at least their parent’s indentation (fixes #4680, #9994, #9995).

Summary

Fix a catastrophic backtracking security vulnerability in the linter

Summary

Fix incorrect node reporting for loops without await

Summary

Added support for Rest/Spread properties, async iteration, and eslint disable block comments.

Summary

Added a new "multiline" type to the padding‑line‑between‑statements rule.

Summary

Added NewExpression support to the comma‑style rule and allowed `continue` in guard‑for‑in loops.

Summary

Added new API features: context.report({ messageId }), CLIEngine.getRules(), and ignoreComments option for the indent rule.

Summary

Added new `allowImplicit` option for array callbacks, support for separate requires in one variable, and counted logical AND in complexity rules.

Summary

Fix: allow empty string to pass end-of-line validation.

Summary

Updated destructuring handling in camelcase (fixes #8511)

Summary

Reverted the previous XML 1.1 formatter fix (commit 1e362a0)

Summary

Added new Linter defineParser function, implicit arrow linebreak rule, and importNames option for restricted imports.

Summary

Bumped core dependencies (espree, ajv) and CI build environments (Node 8/9), removed an unused jsonify dependency.

Summary

Updated and corrected extensive documentation: rule docs, contributor guidelines, issue templates, link fixes, FAQs, and usage examples.

Summary

Added new rules and options: multiline comment style, lines‑between‑class‑members, consistent array‑bracket‑newline, allowElseIf for no‑else‑return, and a fix dry‑run flag.

Summary

Added option to report unused eslint-disable directives (new feature).

Summary

Reverted early assignment of node.parent

Summary

Fixed handling of nested `disable` directives (issue #9318).

Summary

Upgrade Espree to v3.5.1 and improve rule execution order by running rules after node.parent is set.

Summary

Prevent process leak during website generation.

Summary

Added new “function‑paren‑newline” rule and refactored Linter components to be pure functions for better reliability.

Summary

Improved indentation handling: arbitrary nodes can be ignored, multiline new.target indentation fixed, and NaN‑space requirement removed

Summary

Prevent false positives by ignoring multiple spaces when detecting consecutive tabs

Summary

Upgrade core dependencies (Espree to 3.5.0, js-yaml to 3.9.1, eslint‑plugin to 0.8.0) and optimize Linter method handling.

Summary

Added several rule enhancements (prefer destructuring options, generator yields support, numeric literal warnings, custom messages for restricted globals, enforceInMethodNames) and improved indent rule performance.

Summary

Added new features such as a function-as-fix option, getter return rule, always‑multiline ternary option, and other rule enhancements.

Summary

Fix plugin config caching to avoid cross‑plugin interference

Summary

Added new configuration options (overrides/files, eslintIgnore, ignoreComments) and a Fixer method to the Linter API.