What is a linter, what is it used for, and which popular linters do you know?

A linter is a tool for static code analysis that helps find errors, potential bugs, style inconsistencies, and other issues early in development, before running the program. It improves code quality, making it more readable and maintainable.

Popular linters:

• ESLint — for JavaScript and TypeScript
• Stylelint — for CSS and preprocessors
• Pylint, Flake8 — for Python
• RuboCop — for Ruby

Example of using ESLint:

eslint myfile.js

It will show warnings and errors in the code that can be fixed before committing.