ESLint

What is ESLint?

A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript and TypeScript code. Helps maintain code quality by catching bugs, enforcing coding standards, and identifying problematic patterns before they become issues. Features extensive rule sets, plugin ecosystem, and automatic fixing capabilities. The most popular JavaScript linter, used by millions of developers. Integrates with most editors and CI/CD pipelines. Known for its flexibility and comprehensive rule coverage.

When to use it

• Essential for maintaining code quality, finding bugs, enforcing coding standards, and maintaining consistent code style across projects.
• Perfect for teams that want to enforce coding conventions and catch errors early.
• Ideal when you need customizable linting rules, want to integrate with your editor, or require automatic code fixing.
• Commonly used in JavaScript and TypeScript projects, CI/CD pipelines, and when working in teams.

When NOT to use it

• When you only need code formatting - Prettier handles formatting better
• Non-JavaScript/TypeScript projects - use language-specific linters
• Very small projects - may add unnecessary complexity
• When team prefers minimal tooling - can be seen as restrictive

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