Function shouldConstruct

docs/external/js/react-dom.development.js:23802–23805

(Component)

  };

  function shouldConstruct(Component) {
    var prototype = Component.prototype;
    return !!(prototype && prototype.isReactComponent);
  }

  function isSimpleFunctionComponent(type) {
    return typeof type === 'function' && !shouldConstruct(type) && type.defaultProps === undefined;