Introduction to Node.js

Node.js is a JavaScript runtime built on Chrome's V8 engine. It lets you run JavaScript outside the browser, on servers, in CLIs, and in build tools.

Why Node.js?

Non-blocking I/O, handles thousands of concurrent connections efficiently.
One language everywhere, share code and skills between frontend and backend.
npm, the largest package ecosystem in the world.

JavaScript

// hello.js
console.log('Hello from Node.js!');

// hello.js
console.log('Hello from Node.js!');

Run it with:

node hello.js