JavaScript

JavaScript was my first serious language. I used it to build Vira OS entirely in vanilla JS — no frameworks, no bundlers, just raw DOM manipulation, a custom event loop, and a Python interpreter written from scratch in JS. It's still my go-to when I need maximum control or need something to run at a file:// URL.

const fibonacci = n =>
  n <= 1 ? n : fibonacci(n - 1) + fibonacci(n - 2);

const seq = Array.from({ length: 10 }, (_, i) => fibonacci(i));
console.log(seq);
// [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

export default fibonacci;