Function dateTimeFormat

packages/core/src/model/field/date_time_base_field.ts:151–193

(
  timestamp: any,
  props?: IOptionalDateTimeFieldProperty,
  userTimeZone?: string,
)

};

export const dateTimeFormat = (
  timestamp: any,
  props?: IOptionalDateTimeFieldProperty,
  userTimeZone?: string,
) => {
  if (!timestamp) {
    return null;
  }

  props = props || DEFAULT_DATETIME_PROPS;
  const dateFormat = DateFormat[props.dateFormat || DEFAULT_DATETIME_PROPS.dateFormat];
  const timeFormat = TimeFormat[props.timeFormat || DEFAULT_DATETIME_PROPS.timeFormat];
  let format = dateFormat + (props.includeTime ? ' ' + timeFormat : '');

  if (props.includeTime && timeFormat === 'hh:mm') {
    const locale = getLanguage();
    const formatLocale = locale.toLowerCase().split('_').join('-');
    dayjs.locale(formatLocale);
    format += ' a';
  }
  let timeZone = props.timeZone || userTimeZone;
  if (isServer()) {
    timeZone = timeZone || DEFAULT_TIME_ZONE;
  }
  try {
    if (props.includeTimeZone) {
      timeZone = timeZone || DEFAULT_DATETIME_PROPS.timeZone;
      const abbr = getTimeZoneAbbrByUtc(timeZone)!;
      return dfzFormatWithValid(utcToZonedTime(Number(timestamp), timeZone), covertDayjsFormat2DateFnsFormat(format), timeZone ) + ` (${abbr})`;
    }
    if (!props.includeTimeZone && timeZone) {
      // dayjs(Number(timestamp)).tz(timeZone).format(format);
      // Frequent invocations of the "tz" function here will result in severe page lag.
      return dfzFormatWithValid(utcToZonedTime(Number(timestamp), timeZone), covertDayjsFormat2DateFnsFormat(format), timeZone );
    }
  } catch (e) {
    if (e instanceof RangeError) {
      return 'Invalid Date';
    }
    throw e;
  }
  return dfzFormatWithValid(timestamp, covertDayjsFormat2DateFnsFormat(format));
};

const withTimeZone = (timestamp: number | undefined | string, timeZone?: string, locale?: string) => {
  if (timeZone) {