ie-util.tsx

export function renderCompatibleIE(render: Function, render2?: Function) {
  function isIE() {
    const ua = window.navigator.userAgent;
    const msie = ua.indexOf('MSIE ');
    if (msie > 0) {
      // IE 10 or older => return version number
      // return parseInt(ua.substring(msie + 5, ua.indexOf(".", msie)), 10);
      return true;
    }

    const trident = ua.indexOf('Trident/');
    if (trident > 0) {
      // IE 11 => return version number
      // return parseInt(ua.substring(trident + 8, ua.indexOf(".", trident)), 10);
      return true;
    }
    return false;
  }

  if (isIE()) {
    return render2 ? render2() : null;
  }
  return render();
}