Node.js vs Deno Comparison

Introduction

This lesson provides a comprehensive comparison between Node.js and Deno, two popular JavaScript runtime environments. Both serve as platforms for building back-end applications, but they have different philosophies and architectures.

Node.js Overview

Key Features of Node.js

• Non-blocking, event-driven architecture.
• Rich ecosystem with npm (Node Package Manager).
• Single-threaded model with event loop.

Example Code

const http = require('http');

const server = http.createServer((req, res) => {
    res.statusCode = 200;
    res.setHeader('Content-Type', 'text/plain');
    res.end('Hello World\n');
});

server.listen(3000, () => {
    console.log('Server running at http://localhost:3000/');
});

Deno Overview

Key Features of Deno

• TypeScript support out of the box.
• Secure by default, with explicit permission required for file/network access.
• Single executable without the need for a package manager.

Example Code

import { serve } from "https://deno.land/std/http/server.ts";

const server = serve({ port: 8000 });
console.log("Server running at http://localhost:8000/");

for await (const req of server) {
    req.respond({ body: "Hello World\n" });
}

Node.js vs Deno Comparison

Comparison Table

FAQ