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Backend Development
Step 4 / 20120 min

Node.js

Node.js Runtime

Explanation

Node.js lets you build APIs and background jobs in JavaScript with the event loop, modules, and npm.

Code example

javascript
import { createServer } from "node:http";

const server = createServer((req, res) => {
  res.writeHead(200, { "Content-Type": "application/json" });
  res.end(JSON.stringify({ ok: true, path: req.url }));
});

server.listen(4000, () => console.log("http://localhost:4000"));

Helpful resources

Exercise

Build a Node HTTP server that returns JSON for /health and 404 for unknown routes.