Function isValidElement

bundle.js:1020–1022

(object)

  var REACT_ELEMENT_TYPE = typeof Symbol === 'function' && Symbol.for && Symbol.for('react.element') || 0xeac7;

  var isValidElement = function isValidElement(object) {
    return (typeof object === 'undefined' ? 'undefined' : _typeof(object)) === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
  };

  // By explicitly using `prop-types` you are opting into new development behavior.
  // http://fb.me/prop-types-in-prod