JSFiddle - React, Tailwind, and code Playground

JavaScript

var x = 0;
function fib(n) {
    x++;
    if (n <= 1) {
        return 1;
    } else {
        return (fib(n - 1) + fib(n - 2) + fib(n - 3));
    }
}
fib(30);
alert(x);