Express.js¶

Express is the most popular Node.js web framework on the planet — minimalist , unopinionated , middleware-based , and running on every VPS that serves an API built after 2010. It wraps Node's native http module with routing , middleware chaining , request/response helpers , and not much else. Everything else (auth , validation , databases , sessions , templates) you bolt on with middleware — which is both the power and the attack surface

18 files covering Express from first npm install to production deployment , viewed through a security-first lens because popularity means target surface

what you'll find here¶

• Getting Started — Intro , install , first app , routing basics , middleware pattern
• Core Features — Static files , error handling , templating engines , form data handling
• Sessions & Auth — Cookies , sessions , authentication , security hardening
• Validation & Data — Input validation , database integration , REST API patterns
• Testing & Deploy — Testing Express apps , deployment with PM2 , Docker , Nginx
• Reference — Full API reference , middleware catalog , common patterns

prerequisites¶

Node.js basics — know require , npm install , and basic server concepts

first topic -> express_00_home.md