code: function isElement(obj) {
    return !!((typeof HTMLElement === 'undefined' ? 'undefined' : _typeof(HTMLElement)) === 'object' ? obj instanceof HTMLElement : obj && (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) === 'object' && obj !== null && obj.nodeType === 1 && typeof obj.nodeName === 'string');
  }
docs: to test if a HTML element