Infinite list of primes with ES6

primes.js

function* primeGenerator() {
  var n = 2;
  
  while(true) {
    if(isPrime(n)) {
      yield n;
    }
    
    n++;
  }
}

function takeFromGenerator(n, gen) {
  var xs = [];
  
  for(var i = 0; i < n; i++) {
    xs.push(gen.next().value);
  }
  
  return xs;
}

function isPrime(n) {
  for(var i = 2; i <= Math.sqrt(n); i++) {
    if(n % i === 0) {
      return false;
    }
  }

  return true;
}

takeFromGenerator(10, primeGenerator());
// =>  [2,3,5,7,11,13,17,19,23,29]