Linting

Automated analysis of code to flag errors, style inconsistencies, and potential bugs, before the code runs. ESLint is the standard JavaScript/TypeScript linter.

Linting catches bugs and enforces code consistency automatically. It's like spell-check for code, preventing common mistakes and ensuring teams follow the same coding style without manual code review.

A developer adds ESLint to the project. On her first commit, it flags 12 unused variables and 3 potential type errors. All are fixed before the code reaches production.