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Range

A type that generates a range between two given numbers. The last number is not included.

  • For example, generating a range from 1 to 5 includes 1, 2, 3, 4.
  • Returns never if both numbers are equal.
  • Returns never if the first number is greater than the second number.

Interface​

typescript
type Range<T, F> = T extends number
  ? F extends number
    ? Exclude<EnumerateNumbers<F>, EnumerateNumbers<T>>
    : never
  : never;

Type Parameters​

NameConstraintDefaultDescription
T--Start number
F--End number (exclusive)

Usage​

typescript
import { Range } from '@modern-kit/types';

type RangeExample = Range<1, 5>; // 1 | 2 | 3 | 4