JS Flexbox test

function detectFlex(doc){
  // Test element
  let elem = doc.createElement('b');

  // Checker function
  const checkFlex = (kind) => {
    // Gracefully cleaning trash
    elem.removeAttribute('style');

    // Try/catch only because of IE
    try {
      elem.style.display = kind;
    } catch (e) {
      return false;
    }

    return (elem.style.display === kind);
  };

  const result = [
    'flex',
    '-webkit-flex'
  ].some(checkFlex);

  // Gracefully removing temporary element
  doc.removeChild(el);
  return result;
}