Function resolveLocale

resolveLocale(locales?: unknown): string | readonly string[] | undefined
Resolves a locale or list of locales into a standardized configuration format: a single string for one valid locale, a string array for multiple, or undefined if none.
Parameters
- Optionallocales: unknown
  Single or multiple locale identifiers or Intl.Locale instances
Returns string | readonly string[] | undefined
A single canonical string, an array of strings, or undefined
Example
```
resolveLocale('en_US'); // 'en-US'
resolveLocale(['en_US', 'fr_FR']); // ['en-US', 'fr-FR']
resolveLocale(['invalid']); // undefined
```
- Defined in packages/library/src/common/runtime/international.library.ts:382