Генератор диапазона дат

const rangeGenerator = function* (start, end, step = 1) {
  let i = start;
  while (i < end) {
    yield i;
    i += step;
  }
};

const dateRangeGenerator = function* (start, end, step = 1) {
  let d = start;
  while (d < end) {
    yield new Date(d);
    d.setDate(d.getDate() + step);
  }
};

for (let i of rangeGenerator(6, 10)) console.log(i);
// Logs 6, 7, 8, 9

[…dateRangeGenerator(new Date('2021-06-01'), new Date('2021-06-04'))];
// [ 2021-06-01, 2021-06-02, 2021-06-03 ]