ESLint Plugin for React

This is a tool that catches common mistakes in React code before you run it. Think of it as a spell-checker for React projects—it reads through your code and flags patterns that are likely bugs, style inconsistencies, or practices that could cause problems later.

React is a popular JavaScript library for building user interfaces, and it has its own conventions and best practices. ESLint is a general-purpose code checker for JavaScript, but it doesn't know about React-specific patterns out of the box. This plugin extends ESLint with about 30 rules tailored specifically to React. For example, it can warn you if you forget to import React before using its special HTML-like syntax (called JSX), or if you accidentally use certain methods in the wrong lifecycle stage of a component, or if you have duplicate properties on a component tag.

To use it, you install it alongside ESLint via npm (a package manager), then add it to your ESLint configuration file and turn on whichever rules matter to your team. Each rule is optional and configurable—you decide which checks are important. The README provides a full list of the rules available, from formatting checks (like enforcing consistent quote styles) to logic checks (like preventing state mutations in places they shouldn't happen).

This is useful for any team building React applications who wants to enforce consistent code quality and catch React-specific pitfalls automatically. A developer writing a component might get instant feedback that they've used a deprecated pattern or forgotten a required prop type, saving debugging time later. The project is actively maintained and welcomes new rule ideas from the community.