ESLint

ESLint is a pluggable linting utility for JavaScript and JSX. It statically analyses code to quickly find problems, and can fix many of them automatically.

ESLint is built into most text editors and can run as part of a continuous integration pipeline. Rules are configurable and can be extended with plugins and shared configurations.

ESLint is an open source project distributed under the MIT licence and actively developed on GitHub; version 10.13.0 was released in October 2026.