mode_edit codeAPI / @angular/commongetLocaleDayPeriodslinkfunction 试验性的Periods of the day (e.g. [AM, PM] for en-US).getLocaleDayPeriods(locale: string, formStyle: FormStyle, width: TranslationWidth): [string, string]参数localeType: string.formStyleType: FormStyle.widthType: TranslationWidth.返回值[string, string]