eslint

v9.21.0
Original

A widely-used AST-based pattern checker for modern JavaScript and JSX code.

MIT+1
95%

About

ESLint is a comprehensive tool designed for identifying and reporting on patterns found in ECMAScript/JavaScript code. It is highly configurable, allowing developers to define their own linting rules or extend existing ones, making it adaptable to a wide range of coding standards and guidelines. ESLint is pivotal for maintaining code quality and consistency in both small projects and large codebases. With the growth of JavaScript as a primary programming language for web applications, tools like ESLint have gained significant traction in the developer community. The tool supports a variety of environments including Node.js and traditional browser setups, integrating seamlessly into automated workflows through task runners and continuous integration systems. Its vast ecosystem of plugins further enhances its capabilities, allowing for integration with popular frameworks and libraries such as React and Vue.js. Many organizations rely on ESLint to enforce best practices and catch errors before they become pitfalls in production, making it a gatekeeper in modern JavaScript development. The active community around ESLint ensures that it stays up-to-date with the latest language features and community needs, solidifying its place as an essential tool in any JavaScript developer's toolkit.

License Information

MIT(+1 other license found)

Authors

npm@openjsf.org
nicholas@eslint.org

Pulse

Active
Original
95% popularity

Developers appreciate ESLint for its flexibility and extensibility. Many mention how its rules can significantly improve code quality and catch potential bugs early in the development process. The community frequently discusses best practices for configuration and integration into various workflows, highlighting the broad usage across projects of all sizes.

Pros & Cons

Pros

  • Highly configurable and extensible.
  • Strong community support and documentation.
  • Integrates well with other tools and IDEs.
  • Identifies potential issues before runtime.
  • Encourages best coding practices across teams.

Cons

  • Can require significant initial configuration.
  • False positives can occur depending on rules set.
  • Learning curve for new users unfamiliar with linting.
  • Performance issues in very large projects with numerous rules.
  • Dependencies on plugins may lead to maintenance challenges.

Future Outlook

As JavaScript continues to evolve and dominate the web development landscape, ESLint is likely to enhance its support for upcoming language features and maintainers will likely introduce improvements to make the tool even more user-friendly. The integration with tooling around frameworks like React and Vue will continue to grow, and the plugin ecosystem may expand further, adapting to more languages and environments.
Last updated: 12/6/2025