Function getLocaleExtraDayPeriods

packages/common/src/i18n/locale_data_api.ts:672–685

(
  locale: string,
  formStyle: FormStyle,
  width: TranslationWidth,
)

 * To extract a day period use `Intl.DateTimeFormat` with the `dayPeriod` option instead.
 */
export function getLocaleExtraDayPeriods(
  locale: string,
  formStyle: FormStyle,
  width: TranslationWidth,
): string[] {
  const data = ɵfindLocaleData(locale);
  checkFullData(data);
  const dayPeriodsData = <string[][][]>[
    data[ɵLocaleDataIndex.ExtraData][ɵExtraLocaleDataIndex.ExtraDayPeriodFormats],
    data[ɵLocaleDataIndex.ExtraData][ɵExtraLocaleDataIndex.ExtraDayPeriodStandalone],
  ];
  const dayPeriods = getLastDefinedValue(dayPeriodsData, formStyle) || [];
  return getLastDefinedValue(dayPeriods, width) || [];
}

/**
 * Retrieves the writing direction of a specified locale