How to use the react-day-picker.DateUtils.isDate function in react-day-picker

handleKeyPress = e => {
    if (e.key === 'Enter') {
      if (DateUtils.isDate(new Date(e.target.value))) {
        this.handleDayClick(e.target.value);
      }
    }
  };

const parseDate = (str, format, locale) => {
  const parsed = dateFnsParse(str, format, new Date(), { locale });
  return DateUtils.isDate(parsed) ? parsed : null;
};

function parseDate(str, format, locale) {
  const parsed = dateFnsParse(str, format, { locale });
  if (DateUtils.isDate(parsed)) {
    return parsed;
  }
  return undefined;
}