tooling

npm (Node Package Manager) is JavaScript's default package manager for installing, updating, and managing dependencies. Key files are package.json (project metadata) and package-lock.json (exact versions). Use npm install, npm update, and npm uninstall for management.

ESLint is a JavaScript/TypeScript linter that analyzes code for potential errors, style issues, and best practices. It catches bugs before runtime, enforces consistent code style, and can automatically fix many issues. Essential for team projects.

Prettier is an opinionated code formatter that automatically formats code for consistent style. Unlike ESLint (which checks code quality and some style), Prettier only handles formatting. Use both together: ESLint for bugs, Prettier for formatting.

Vite is a modern build tool with lightning-fast dev server using native ES modules (no bundling during development) and optimized production builds with Rollup. It's faster because it serves files on-demand instead of bundling everything upfront.

Essential Git commands include: clone (copy repo), add/commit (save changes), push/pull (sync with remote), branch/checkout (manage branches), merge (combine branches), and status/log (view state). Understanding these enables effective collaboration.