ESLint

JavaScript/TypeScript Code Linter E Integrations & Community

Basic Information

  • Developer: Nicholas C. Zakas / ESLint Community
  • Country/Region: United States
  • Official Website: https://eslint.org
  • GitHub: https://github.com/eslint/eslint
  • Type: JavaScript/TypeScript Code Linter
  • First Release: June 2013
  • Latest Version: ESLint v10.1.0 (March 2026)
  • License: MIT

Product Description

ESLint is the most popular code linting tool in the JavaScript and TypeScript ecosystem, helping developers discover and fix issues in their code through static analysis. ESLint features a pluggable architecture, allowing developers to customize rules, parsers, and plugins. In February 2026, ESLint v10.0.0 was officially released, completely removing the old eslintrc configuration system and fully adopting Flat Config as the sole configuration method.

Core Features/Characteristics

  • Static Code Analysis: Detects code errors, potential bugs, and poor coding practices
  • Pluggable Architecture: Supports custom rules, parsers, and plugins
  • Automatic Fixing: Many rules support --fix for automatic fixes
  • Flat Config: The only configuration method in v10, resolving configurations based on file location
  • Bulk Suppression: v10.1.0 API supports bulk suppression functionality
  • TypeScript Support: Provides TypeScript linting through the typescript-eslint plugin
  • Built-in Type Definitions: Espree and ESLint Scope now include built-in type definitions

Key Changes in ESLint v10.0.0

  • Complete removal of the eslintrc configuration system
  • No longer reads .eslintrc.* and .eslintignore files
  • Configuration files are searched starting from the file directory rather than the working directory
  • Minimum Node.js version requirement: v20.19.0
  • Dropped support for Node.js v21.x and v23.x

Business Model

  • Completely Free and Open Source: MIT License
  • Sponsorship Support: Funded through Open Collective and GitHub Sponsors
  • Corporate Sponsorships: Multiple tech companies sponsor ESLint development

Market Performance

  • The most widely used Linter in the JavaScript/TypeScript ecosystem
  • Tens of millions of weekly npm downloads
  • Standard configuration for almost all TypeScript projects
  • Rich ecosystem of third-party plugins

Relationship with the OpenClaw Ecosystem

ESLint serves as the code quality assurance tool for OpenClaw. OpenClaw uses ESLint to inspect the quality of TypeScript code during the development phase, identifying potential errors and inconsistent coding styles. ESLint is integrated with GitHub Actions to run automatically in the CI pipeline, ensuring that every code submission meets the project's coding standards.