Method supportedLocalesOf

packages/intl-durationformat/core.ts:311–320

(
    locales: string | string[],
    options?: Pick<DurationFormatOptions, 'localeMatcher'>
  )

  }

  static supportedLocalesOf(
    locales: string | string[],
    options?: Pick<DurationFormatOptions, 'localeMatcher'>
  ): string[] {
    return SupportedLocales(
      DurationFormat.availableLocales,
      CanonicalizeLocaleList(locales),
      options as any
    )
  }

  static __defaultLocale = 'en'
  static availableLocales: Set<string> = new Set<string>()