Building RESTful APIs with Express.js

# Building RESTful APIs with Express.js Express.js is the most popular Node.js framework for building web applications and APIs. In this guide, we'll explore best practices for creating RESTful APIs. ## Setting Up Your Project Start by initializing a new Node.js project and installing Express: ```bash npm init -y npm install express ``` ## Creating Your First Route Express makes it easy to define routes for different HTTP methods: ```javascript const express = require('express'); const app = express(); app.get('/api/users', (req, res) => { res.json({ users: [] }); }); app.listen(3000, () => { console.log('Server running on port 3000'); }); ``` ## REST Best Practices 1. Use proper HTTP methods (GET, POST, PUT, DELETE) 2. Version your API (/api/v1/) 3. Use meaningful status codes 4. Implement proper error handling 5. Add request validation ## Middleware Pattern Express middleware is powerful for handling cross-cutting concerns: ```javascript app.use(express.json()); app.use(authenticate); app.use(errorHandler); ``` Building robust APIs requires attention to detail and following established patterns. Express.js provides the flexibility to build APIs that scale.