Javascript Generator function (ES2015) for creating cartesian product of multiple lists

product.js

function *productHelper(lists, prefix = []) {
  if (lists.length === 0) {
    yield [];
  } else {
    const [head, ...rest] = lists;
    for (let item of head) {
      const newPrefix = prefix.concat(item);
      if (rest.length) {
        yield *productHelper(rest, newPrefix);
      } else {
        yield newPrefix;
      }
    }
  }
}

function *product(...lists) {
  yield *productHelper(lists);
}

for (let p of product([[1, 2], [3, 4], [5, 6]])) {
  console.log(p);
}

// [ 1, 3, 5 ]
// [ 1, 3, 6 ]
// [ 1, 4, 5 ]
// [ 1, 4, 6 ]
// [ 2, 3, 5 ]
// [ 2, 3, 6 ]
// [ 2, 4, 5 ]
// [ 2, 4, 6 ]

doesn't work as it but it is not far. the function *product(...lists) needs to be function *product(lists).