v0ltoz/react-datetimepicker

export const browserVersion = () => {
  let ua = navigator.userAgent,
    tem,
    M =
      ua.match(
        /(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i,
      ) || [];
  if (/trident/i.test(M[1])) {
    tem = /\brv[ :]+(\d+)/g.exec(ua) || [];
    return `IE ${tem[1] || ''}`;
  }
  if (M[1] === 'Chrome') {
    tem = ua.match(/\b(OPR|Edge)\/(\d+)/);
    if (tem != null)
      return tem
        .slice(1)
        .join(' ')
        .replace('OPR', 'Opera');
  }
  M = M[2] ? [M[1], M[2]] : [navigator.appName, navigator.appVersion, '-?'];
  if ((tem = ua.match(/version\/(\d+)/i)) != null) M.splice(1, 1, tem[1]);
  return M.join(' ');
};

export const isFirefoxBelow53 = () => {
  let browser = browserVersion();
  if (!browser) {
    return false;
  }
  let browserSplit = browser.split(' ');
  if (browserSplit.length !== 2) {
    return false;
  }
  if (browserSplit[0] !== 'Firefox') {
    return false;
  }
  try {
    let versionNumber = Number.parseInt(browserSplit[1]);
    if (versionNumber <= 52) {
      return true;
    }
  } catch (e) {
    return false;
  }
  return false;
};