Function lazy

docs/external/js/react.development.js:1452–1500

(ctor)

  }

  function lazy(ctor) {
    var lazyType = {
      $$typeof: REACT_LAZY_TYPE,
      _ctor: ctor,
      // React uses these fields to store the result.
      _status: -1,
      _result: null
    };

    {
      // In production, this would just set it on the object.
      var defaultProps;
      var propTypes;
      Object.defineProperties(lazyType, {
        defaultProps: {
          configurable: true,
          get: function () {
            return defaultProps;
          },
          set: function (newDefaultProps) {
            error('React.lazy(...): It is not supported to assign `defaultProps` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');

            defaultProps = newDefaultProps; // Match production behavior more closely:

            Object.defineProperty(lazyType, 'defaultProps', {
              enumerable: true
            });
          }
        },
        propTypes: {
          configurable: true,
          get: function () {
            return propTypes;
          },
          set: function (newPropTypes) {
            error('React.lazy(...): It is not supported to assign `propTypes` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');

            propTypes = newPropTypes; // Match production behavior more closely:

            Object.defineProperty(lazyType, 'propTypes', {
              enumerable: true
            });
          }
        }
      });
    }

    return lazyType;
  }

  function forwardRef(render) {
    {