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Full-Stack · Quick Reference
Lesson 24 — Node.js Intro Cheat Sheet
In one line: Node.js runs JavaScript outside the browser via the V8 engine, using a single-threaded, non-blocking event loop.
Key Ideas
1V8 engine. The same engine that powers Chrome.
2Event loop. Non-blocking I/O, callbacks fire when ready.
3npm. Node's package manager.
4http module. Built-in — no framework required.
5server.listen(port). Starts the server.
Raw HTTP Server
const http = require('http');
const server = http.createServer((req, res) => {
res.writeHead(200, {'Content-Type':'text/plain'});
res.end('Hello from Node!');
});
server.listen(3000);