const set = (n) => Array.from({ length: n }, (value, index) => index + 1);

function* subsets(set) {
    const total = 1 << set.length;
    for (let i = 0; i < total; i++) {
      const sub = [];
      set.forEach((val, j) => (i & (1 << j)) && sub.push(val));
      yield sub;
    }
}

for (const subset of subsets(set(6))) {
  console.log(subset);
}