// The solution is so simple(not easy) compared to other solutions, my brains hurts, but proud of my work!

function sumFibs(n, a = 0, b = 1) {
  if (a > n) return 0;
  if (a % 2 !== 0) return a + sumFibs(n, a + b, a);
  else return 0 + sumFibs(n, a + b, a);
}
sumFibs(10); //1 + 1 + 3 + 5 = 10