fibonacciGenerator.js

/**
 * fibonacciGenerator.js
 * tags: { JavaScript, Generator, Iterator }
 */
function* fibonacciGenerator() {
    var [prev, curr] = [0, 1]

    while(true) {
        [prev, curr] = [curr, prev + curr]
        yield curr
    }
}

for(n of fibonacciGenerator()) {
  console.log({n})
}