code: function checkOlderIE() {
    const ua = navigator.userAgent;
    const isIE = ua.indexOf('MSIE') !== -1 || ua.indexOf('Trident') !== -1;
    if (!isIE) {
      return false;
    }
    const version = ua.match(/(MSIE\s|Trident.*rv:)([\w.]+)/)[2];
    const versionNumber = parseFloat(version);
    if (versionNumber < 10) {
      return true;
    }
    return false;
  }
docs: Check if it is IE below 10.
  @returns {boolean}