# Clean Code with ESLint and Prettier

ESLint reads your code and flags likely mistakes, like an unused variable or a == that should be ===, and Prettier formats every file the same way, so you set them up once with a flat config and npm scripts and let VS Code run them as you save.

![Cheat sheet: Clean Code with ESLint and Prettier](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/10/95c09a8782224c599e44578e27d89178.webp)

- Category: JavaScript
- Level: Journeyman
- Tags: ESLint, JavaScript, Linter, nodejs, Prettier, software-development
- Updated: November 1, 2026

Source: https://www.ask-codey.com/cheat-sheets/javascript-tooling-eslint-and-prettier-cheat-sheet