Handle file uploads end-to-end with working code. FormData, fetch, multer, S3 presigned URLs, validation, and security — all with copy-paste examples.
Tutorial series
Fullstack Javascript
7 tutorials — follow in order for the best learning path.
- File Uploads: Client to Server to Storage
- Full-Stack JavaScript Project Setup with Node.js and Vite
Learn to structure and run a full-stack JavaScript app with Express and Vite. Covers project layout, proxy, env variables, and running both servers together.
- Client-Server Communication Patterns
Master client-server communication in JavaScript: REST APIs with fetch and axios, persistent WebSocket connections, and Server-Sent Events for real-time data.
- Full-Stack Form Handling and Validation
Build secure full-stack forms with HTML5 constraint validation, Express backend validation using Zod, and CSRF protection.
- Server Rendering vs. Client Rendering
Server rendering vs. client rendering: when to render on the server for fast first paint and reliable SEO, and when client rendering makes more sense.
- Real-Time Features with WebSockets
Build real-time features with WebSockets: chat, live dashboards, collaborative tools. Covers server setup, scaling, rooms, auth, and production deployment.
- Integration Testing a Full-Stack App
A practical guide to integration testing for full-stack JavaScript. Covers API testing with Vitest and Supertest, database rollback, and auth flows.