tooling

Prettier is an opinionated code formatter that enforces consistent style by parsing code and reprinting it according to its own rules, while ESLint handles code quality — using both together eliminates style debates and catches real bugs.

ESLint statically analyzes JavaScript and TypeScript code to find bugs, enforce coding conventions, and suggest improvements, with the new flat config system using eslint.config.js for simpler, more composable rule configuration.

Package managers like npm, Yarn, and pnpm handle installing, updating, and resolving JavaScript dependencies, using package.json for project metadata, lockfiles for deterministic installs, and semantic versioning for compatible updates.

Git tracks changes through a three-area workflow (working directory, staging area, repository), with branching strategies like trunk-based development and Gitflow providing structure for team collaboration and release management.