range.js

const range = function* (
 from,
 to,
 step = from > to ? -1 : 1
) {
 if (
  step < 0
   ? from <= to
   : from >= to
 ) {
  return;
 }
 yield from;
 return yield* range(from + step, to, step);
};

range.sync.js

const range = (start, stop, step = 1) =>
  Array(Math.ceil((stop - start) / step))
    .fill(start)
    .map((x, y) => x + y * step);

//Which i'm using with:
for (y of range(minY, maxY)) {
      //foo
    }

range2.js

function* range(from, to, step=1) {
  const sign = Math.sign(step)
  for (let i = 0; (from + i * step) * sign < to * step; i++) {
    yield from + i * step
  }
}
Array.from(range(5, 1, -1))