An iterable Range class.
The usage is as simple as new Range(start = 0, end = Infinity, step = 1), with a .for(iterable) method.
import Range from 'class-range';
for (const i of new Range(0, 3))
console.log(i); // 0, 1, 2
for (const c of new Range(1, 3).for('abcd'))
console.log(c); // "b", "c"