generatingFibonacciWithSimpleIterator.js

let fibonacciSequenceIterator = makeFibonacciSequenceIterator(5); // Generates the first 5 numbers.
let result = fibonacciSequenceIterator.next();
while (!result.done) {
    console.log(result.value); // 1 1 2 3 5 8
    result = fibonacciSequenceIterator.next();
}