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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 HOME