Question 1

How to set up ESLint with TypeScript?

Accepted Answer

Install the typescript-eslint parser and plugin, then configure ESLint to use them in your eslint.config.js. The README notes that ESLint doesn't understand TypeScript semantics natively, so community plugins are essential for full support.

Question 2

ESLint vs Prettier: which one should I use?

Accepted Answer

ESLint is a linter for finding problematic patterns, while Prettier is a code formatter for styling. They serve different purposes; using both is common, and the READMIE references Prettier's documentation for integration tips.

Question 3

Why isn't ESLint catching my React-specific errors?

Accepted Answer

ESLint parses JSX syntax but doesn't recognize React semantics. Install eslint-plugin-react for rules on React-specific issues like prop types or hook dependencies, as mentioned in the FAQ.

Question 4

How to ignore files or rules in ESLint?

Accepted Answer

Use the 'ignores' key in eslint.config.js or create an .eslintignore file for file patterns. For rules, set them to 'off' in configuration, with examples provided in the README's Configuration section.

Question 5

What Node.js version do I need for ESLint?

Accepted Answer

ESLint requires Node.js ^20.19.0, ^22.13.0, or >=24, as stated in the prerequisites. The team updates supported versions with each major release, which can impact legacy projects.

Question 6

Can ESLint work with experimental JavaScript like decorators?

Accepted Answer

For stage 3 ECMAScript proposals, you must use @babel/eslint-parser and @babel/eslint-plugin, as ESLint only officially supports final standards, per the FAQ on experimental features.

ESLint

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