Function formatDate

formatDate(date: Date, separator?: string): string
Formats a date as a string in YYYY-MM-DD format (or custom separator).
Parameters
- date: Date
  The Date object to format.
- separator: string = '-'
  Optional separator to use between year, month, and day (default: -).
Returns string
A formatted date string.
Example
```
formatDate(new Date(2025, 6, 23)); // '2025-07-23'
formatDate(new Date(2025, 6, 23), '/'); // '2025/07/23'
```
- Defined in date/format.ts:12