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Building a RESTful API with Express.js

By TechLog Admin 1 min read

Building RESTful APIs with Express.js

Express.js remains one of the most popular Node.js frameworks for building web APIs. Here's a modern approach.

Project Setup

mkdir my-api && cd my-api
npm init -y
npm install express cors helmet

Basic Server

const express = require('express');
const app = express();

app.use(express.json());
app.use(cors());

app.get('/api/health', (req, res) => {
  res.json({ status: 'ok' });
});

app.listen(3000);

Structuring Your Application

Organize your code by feature, not by technical role:
src/
├── routes/       # Route definitions
├── middleware/    # Custom middleware
├── models/       # Data models
└── services/     # Business logic

Error Handling

Centralized error handling is crucial for maintainable APIs. Use middleware for consistent error responses. Express.js continues to be an excellent choice for building APIs thanks to its simplicity, ecosystem, and performance.

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