Function compareDate

compareDate(
    source?: string | Date | null,
    target?: string | Date | null,
    nullGreater?: boolean,
): number
Returns 1 if source greater than target, -1 if source less than target, 0 if equals
Parameters
- Optionalsource: string | Date | null
  The first date to compare
- Optionaltarget: string | Date | null
  The second date to compare
- nullGreater: boolean = false
  Whether a nil (undefined or null) value is considered greater than another non-nil value
Returns number
1 if source greater than target, -1 if source less than target, 0 if equals
Author
David Hsing
Example
```
compareDate(new Date('2023-01-02'), new Date('2023-01-01'));    // 1
compareDate(new Date('2023-01-01'), new Date('2023-01-02'));    // -1
compareDate(new Date('2023-01-01'), '2023-01-01');    // 0
compareDate(undefined, null);    // 0
compareDate(undefined, new Date(), true);    // 1
compareDate(undefined, new Date(), false);    // -1
```