Javascript: diferencias entre dos arrays

<script>
const difference = (a, b) => {
  const s = new Set(b);
  return a.filter(x => !s.has(x));
};

arr1 = [1, 2, 3, 4, 5, 6];
arr2 = [2, 4, 6, 8, 10];

varAux = difference(arr1, arr2);
console.log(varAux); // [1, 3, 5]

varAux = difference(arr2, arr1);
console.log(varAux); // [8, 10]
</script>