Highlights MCP Server Integration ESLint v9.26.0 adds support for a Model Context Protocol (MCP) server, enabling ESLint to interact with AI models and tools through a unified interface. This feature allows large language models (LLMs) to run ESLint in IDEs and other software, assisting developers with tasks like linting and code analysis. The MCP server can be started using the --mcp flag in the
For more detailed instructions on how to use Oxlint and integrate it with your project or editor, check out the installation guide. Highlight of new features since general availability Significant performance improvements, up to twice as fast compared to the previous releaseIncludes over 500 rules built-in, with no extra installation requiredMany rules from the typescript, unicorn, react, react-p
8.26.0 (2025-03-03) 🚀 Features support TypeScript 5.8 (#10903) eslint-plugin: [no-unnecessary-type-parameters] special case tuples and parameter location arrays as single-use (#9536) eslint-plugin: [no-unused-var] handle implicit exports in declaration files (#10714) eslint-plugin: [explicit-module-boundary-types] add an option to ignore overload implementations (#10889) eslint-plugin: [unified-s
Highlights Reporting unused /* eslint */ config comments This release introduces a new config option linterOptions.reportUnusedInlineConfigs and corresponding CLI option --report-unused-inline-configs. When this option is set to "warn" or "error", ESLint will report inline rule configuration comments whose severity and options match what’s already been configured for the same rule. // eslint.confi
Highlights The predefined array of config objects used by ESLint can be now accessed programmatically as ESLint.defaultConfig. To speed up loading, the ESLint CLI will automatically enable V8’s code cache in newer versions of Node.js. Custom languages can now provide their default options with the defaultLanguageOptions property. See the documentation about the Language object. Features 381c32b fe
Oxlint v0.10.0 is here! This release includes several exciting features, including many improvements to configuration files. New Features New Rules This release includes the following new rules: promise/no-callback-in-promise react/iframe-missing-sandbox node/no-new-require And adds auto fixes/suggestions for: eslint/no-plusplus Enable/Disable Rules by Category You can now enable or disable
Highlights Types now included We’ve been receiving complaints about the @types/eslint package not being updated after the v9 release. While we did do an initial update to the package for v9, it quickly became apparent that regular updates to that package could not be accomplished in a timely manner. Ultimately, we decided that the only way for us to provide the type of experience we want for ESLin
Highlights Here are some of the key changes in this release. Experimental TypeScript configuration files Arya Emami landed experimental support for TypeScript configuration files. Specifically, you can now use eslint.config.ts, eslint.config.mts, and eslint.config.cts files as your configuration files. Because this feature is experimental, you’ll need to use the unstable_ts_config feature flag: np
typescript-eslint is the tooling that enables standard JavaScript tools such as ESLint and Prettier to support TypeScript code. We've been working on a set of breaking changes and general features that we're excited to get in front of users. And now, we're excited to say that typescript-eslint v8 is released as stable! 🎉 We'd previously blogged about v8 in Announcing typescript-eslint v8 Beta. Th
Today we’re excited to announce the release of Biome v1.7! This new version provides an easy path to migrate from ESLint and Prettier. It also introduces experimental machine-readable reports for the formatter and the linter, new linter rules, and many fixes. Update Biome using the following commands: npm install --save-dev --save-exact @biomejs/biome@latestnpx @biomejs/biome migrate Migrate from
Highlights This is a summary of the significant changes, both breaking and non-breaking, you need to know about when upgrading from ESLint v8.x to ESLint v9.0.0. Installing Because this is a major release, you may not automatically be upgraded by npm. To ensure you are using this version, run: npm i eslint@9.0.0 --save-dev Copy code to clipboard Migration Guide As there are a lot of changes, we’ve
Highlights This release backports from v9.x to v8.x two new features and several bug fixes related to the flat config system to help plugins, integrations and users migrate to flat config ahead of the final v9.0.0 release. Support for eslint.config.mjs and eslint.config.cjs This release introduces support for eslint.config.mjs and eslint.config.cjs configuration files to v8.x in addition to eslint
typescript-eslint is the tooling that enables standard JavaScript tools such as ESLint and Prettier to support TypeScript code. We've been working on infrastructure improvements that will help ensuring long-term interoperability with other tools in the ecosystem. In particular this major release tightens our dependency requirements to help set us up for ESLint v9 and includes a new package typescr
2024-01-01 quick-lint-js is a JavaScript bug finder. Today, version 3.0 makes it also a TypeScript bug finder! quick-lint-js complements TypeScript with beginner-friendly messages and fast linting. install quick-lint-js 🌐 try in browser code on GitHub Example code used in this article has been adapted from various open source projects, including some Copyright Tiny Technologies, Inc. and Copyrigh
We are thrilled to announce that oxlint is now generally available! This milestone signifies our team's ability to promptly address and triage issues. Oxlint is a JavaScript linter designed to catch erroneous or useless code without requiring any configurations by default. How to Use At this stage, oxlint is not intended to fully replace ESLint; it serves as an enhancement when ESLint's slowness
Highlights Support for regular expressions v flag We have updated ESLint to fully support the ECMAScript 2024 regular expression v flag. This flag allows more complex operations such as difference/subtraction, intersection, and nested character classes. These updates include parsing and ensuring that rules related to regular expressions are behaving as expected. Better error messages for flat conf
typescript-eslint is the tooling that enables standard JavaScript tools such as ESLint and Prettier to support TypeScript code. We've been working on a set of breaking changes and general features that we're excited to get released! 🎉 We'd previously blogged about v6 in Announcing typescript-eslint v6 Beta. This blog post contains much of the same information as that one, but updated for changes
Highlights The no-extra-parens rule has a new option ternaryOperandBinaryExpressions. eslint.config.js configuration files can now also export a promise that resolves to the configuration array. This can be useful for using ESM dependencies in CommonJS configuration files. The context.parserServices property is now deprecated in favor of SourceCode#parserServices. This change is part of the implem
Highlights Integrations can now use the new function shouldUseFlatConfig() to determine whether to use the FlatESLint class instead of the ESLint class. The performance of the indent rule has been significantly improved. Features 880a431 feat: change default ignore pattern to **/node_modules/ in flat config (#17184) (Milos Djermanovic) 8bf5505 feat: expose shouldUseFlatConfig (#17169) (Connor Prus
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