'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }

var React = require('react');
var React__default = _interopDefault(React);
var shallowEqual = _interopDefault(require('shallowequal'));
var levenshtein = _interopDefault(require('fast-levenshtein'));
var ReactDOM = _interopDefault(require('react-dom'));
var PropTypes = _interopDefault(require('prop-types'));
var defaultPolyfill = require('react-lifecycles-compat');
var defaultPolyfill__default = _interopDefault(defaultPolyfill);
var hoistNonReactStatic = _interopDefault(require('hoist-non-react-statics'));

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
  return typeof obj;
} : function (obj) {
  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};

var classCallCheck = function (instance, Constructor) {
  if (!(instance instanceof Constructor)) {
    throw new TypeError("Cannot call a class as a function");
  }
};

var _extends = Object.assign || function (target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i];

    for (var key in source) {
      if (Object.prototype.hasOwnProperty.call(source, key)) {
        target[key] = source[key];
      }
    }
  }

  return target;
};

var inherits = function (subClass, superClass) {
  if (typeof superClass !== "function" && superClass !== null) {
    throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
  }

  subClass.prototype = Object.create(superClass && superClass.prototype, {
    constructor: {
      value: subClass,
      enumerable: false,
      writable: true,
      configurable: true
    }
  });
  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
};

var possibleConstructorReturn = function (self, call) {
  if (!self) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return call && (typeof call === "object" || typeof call === "function") ? call : self;
};

/* eslint-disable no-underscore-dangle */

var isCompositeComponent = function isCompositeComponent(type) {
  return typeof type === 'function';
};
var isReloadableComponent = function isReloadableComponent(type) {
  return typeof type === 'function' || (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object';
};

var getComponentDisplayName = function getComponentDisplayName(type) {
  var displayName = type.displayName || type.name;
  return displayName && displayName !== 'ReactComponent' ? displayName : 'Component';
};

var reactLifeCycleMountMethods = ['componentWillMount', 'componentDidMount'];

function isReactClass(Component) {
  return !!(Component.prototype && (React__default.Component.prototype.isPrototypeOf(Component.prototype) ||
  // react 14 support
  Component.prototype.isReactComponent || Component.prototype.componentWillMount || Component.prototype.componentWillUnmount || Component.prototype.componentDidMount || Component.prototype.componentDidUnmount || Component.prototype.render));
}

function isReactClassInstance(Component) {
  return Component && isReactClass({ prototype: Object.getPrototypeOf(Component) });
}

var getInternalInstance = function getInternalInstance(instance) {
  return instance._reactInternalFiber || // React 16
  instance._reactInternalInstance || // React 15
  null;
};

var updateInstance = function updateInstance(instance) {
  var updater = instance.updater,
      forceUpdate = instance.forceUpdate;

  if (typeof forceUpdate === 'function') {
    instance.forceUpdate();
  } else if (updater && typeof updater.enqueueForceUpdate === 'function') {
    updater.enqueueForceUpdate(instance);
  }
};

var isFragmentNode = function isFragmentNode(_ref) {
  var type = _ref.type;
  return React__default.Fragment && type === React__default.Fragment;
};

var ContextType = React__default.createContext ? React__default.createContext() : null;
var ConsumerType = ContextType && ContextType.Consumer.$$typeof;
var ProviderType = ContextType && ContextType.Provider.$$typeof;
var MemoType = React__default.memo && React__default.memo(function () {
  return null;
}).$$typeof;
var LazyType = React__default.lazy && React__default.lazy(function () {
  return null;
}).$$typeof;
var ForwardType = React__default.forwardRef && React__default.forwardRef(function () {
  return null;
}).$$typeof;

var CONTEXT_CURRENT_VALUE = '_currentValue';

var isContextConsumer = function isContextConsumer(_ref2) {
  var type = _ref2.type;
  return type && (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && '$$typeof' in type && type.$$typeof === ConsumerType && ConsumerType;
};
var isContextProvider = function isContextProvider(_ref3) {
  var type = _ref3.type;
  return type && (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && '$$typeof' in type && type.$$typeof === ProviderType && ProviderType;
};
var isMemoType = function isMemoType(_ref4) {
  var type = _ref4.type;
  return type && (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && '$$typeof' in type && type.$$typeof === MemoType && MemoType;
};
var isLazyType = function isLazyType(_ref5) {
  var type = _ref5.type;
  return type && (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && '$$typeof' in type && type.$$typeof === LazyType && LazyType;
};
var isForwardType = function isForwardType(_ref6) {
  var type = _ref6.type;
  return type && (typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object' && '$$typeof' in type && type.$$typeof === ForwardType && ForwardType;
};
var isContextType = function isContextType(type) {
  return isContextConsumer(type) || isContextProvider(type);
};

var getElementType = function getElementType(type) {
  var element = { type: type };

  if (isContextConsumer(element)) {
    return 'Consumer';
  }
  if (isContextProvider(element)) {
    return 'Provider';
  }
  if (isLazyType(element)) {
    return 'Lazy';
  }
  if (isMemoType(element)) {
    return 'Memo';
  }
  if (isForwardType(element)) {
    return 'Forward';
  }

  if (isReactClass(type)) {
    return 'Class';
  }

  if (typeof element === 'function') {
    return 'FC';
  }

  return 'unknown';
};

var getContextProvider = function getContextProvider(type) {
  return type && type._context;
};

var configuration = {
  // Log level
  logLevel: 'error',

  // Allows using SFC without changes
  pureSFC: true,

  // keep render method unpatched, moving sideEffect to componentDidUpdate
  pureRender: true,

  // Allows SFC to be used, enables "intermediate" components used by Relay, should be disabled for Preact
  allowSFC: true,

  // Allow reload of effect hooks with non zero dependency list
  reloadHooks: true,

  // Allow reload of mount effect hooks - zero deps
  reloadLifeCycleHooks: false,

  // Enables hook reload on hook body change
  reloadHooksOnBodyChange: true,

  // Disable "hot-replacement-render"
  disableHotRenderer: false,

  // @private
  integratedComparator: false,
  // @private
  integratedResolver: false,

  // Disable "hot-replacement-render" when injection into react-dom is made
  disableHotRendererWhenInjected: true,

  // Controls `react-🔥-dom patch` notification
  showReactDomPatchNotification: true,

  // Hook on babel component register.
  onComponentRegister: false,

  // Hook on React renders for a first time component
  onComponentCreate: false,

  // flag to completely disable RHL for SFC. Probably don't use it without dom patch made.
  ignoreSFC: false,

  // ignoreSFC when injection into react-dom is made
  ignoreSFCWhenInjected: true,

  // flag to completely disable RHL for Components
  ignoreComponents: false,

  // default value for AppContainer errorOverlay
  errorReporter: undefined,

  // Global error overlay
  ErrorOverlay: undefined,

  // Actively track lazy loaded components
  trackTailUpdates: true,

  // react hot dom features enabled
  IS_REACT_MERGE_ENABLED: false
};

var internalConfiguration = {
  // control proxy creation
  disableProxyCreation: false
};

var setConfiguration = function setConfiguration(config) {
  // not using Object.assing for IE11 compliance
  for (var i in config) {
    if (config.hasOwnProperty(i)) {
      configuration[i] = config[i];
    }
  }
};

/* eslint-disable no-console */

var logger = {
  debug: function debug() {
    if (['debug'].indexOf(configuration.logLevel) !== -1) {
      var _console;

      (_console = console).debug.apply(_console, arguments);
    }
  },
  log: function log() {
    if (['debug', 'log'].indexOf(configuration.logLevel) !== -1) {
      var _console2;

      (_console2 = console).log.apply(_console2, arguments);
    }
  },
  warn: function warn() {
    if (['debug', 'log', 'warn'].indexOf(configuration.logLevel) !== -1) {
      var _console3;

      (_console3 = console).warn.apply(_console3, arguments);
    }
  },
  error: function error() {
    if (['debug', 'log', 'warn', 'error'].indexOf(configuration.logLevel) !== -1) {
      var _console4;

      (_console4 = console).error.apply(_console4, arguments);
    }
  }
};

/* eslint-disable no-eval, func-names */

function safeReactConstructor(Component, lastInstance) {
  try {
    if (lastInstance) {
      return new Component(lastInstance.props, lastInstance.context);
    }
    return new Component({}, {});
  } catch (e) {
    // some components, like Redux connect could not be created without proper context
  }
  return null;
}

function isNativeFunction(fn) {
  return typeof fn === 'function' ? fn.toString().indexOf('[native code]') > 0 : false;
}

var identity = function identity(a) {
  return a;
};
var indirectEval = eval;

var doesSupportClasses = function () {
  try {
    indirectEval('class Test {}');
    return true;
  } catch (e) {
    return false;
  }
}();

var ES6ProxyComponentFactory = function ES6ProxyComponentFactory(InitialParent, postConstructionAction) {
  return indirectEval('\n(function(InitialParent, postConstructionAction) {\n  return class ' + (InitialParent.name || 'HotComponent') + ' extends InitialParent {\n    /*\n     ! THIS IS NOT YOUR COMPONENT !\n     !  THIS IS REACT-HOT-LOADER  !\n  \n     this is a "' + InitialParent.name + '" component, patched by React-Hot-Loader\n     Sorry, but the real class code was hidden behind this facade\n     Please refer to https://github.com/gaearon/react-hot-loader for details...\n    */    \n    \n    constructor(props, context) {\n      super(props, context)\n      postConstructionAction.call(this)\n    }\n  }\n})\n')(InitialParent, postConstructionAction);
};

var ES5ProxyComponentFactory = function ES5ProxyComponentFactory(InitialParent, postConstructionAction) {
  function ProxyComponent(props, context) {
    InitialParent.call(this, props, context);
    postConstructionAction.call(this);
  }
  ProxyComponent.prototype = Object.create(InitialParent.prototype);
  Object.setPrototypeOf(ProxyComponent, InitialParent);
  return ProxyComponent;
};

var proxyClassCreator = doesSupportClasses ? ES6ProxyComponentFactory : ES5ProxyComponentFactory;

function getOwnKeys(target) {
  return [].concat(Object.getOwnPropertyNames(target), Object.getOwnPropertySymbols(target));
}

function shallowStringsEqual(a, b) {
  for (var key in a) {
    if (String(a[key]) !== String(b[key])) {
      return false;
    }
  }
  return true;
}

function deepPrototypeUpdate(dest, source) {
  var deepDest = Object.getPrototypeOf(dest);
  var deepSrc = Object.getPrototypeOf(source);
  if (deepDest && deepSrc && deepSrc !== deepDest) {
    deepPrototypeUpdate(deepDest, deepSrc);
  }
  if (source.prototype && source.prototype !== dest.prototype) {
    dest.prototype = source.prototype;
  }
}

function safeDefineProperty(target, key, props) {
  try {
    Object.defineProperty(target, key, props);
  } catch (e) {
    logger.warn('Error while wrapping', key, ' -> ', e);
  }
}

var PREFIX = '__reactstandin__';
var PROXY_KEY = PREFIX + 'key';
var GENERATION = PREFIX + 'proxyGeneration';
var REGENERATE_METHOD = PREFIX + 'regenerateByEval';
var UNWRAP_PROXY = PREFIX + 'getCurrent';
var CACHED_RESULT = PREFIX + 'cachedResult';
var PROXY_IS_MOUNTED = PREFIX + 'isMounted';

var RENDERED_GENERATION = 'REACT_HOT_LOADER_RENDERED_GENERATION';

var RESERVED_STATICS = ['length', 'displayName', 'name', 'arguments', 'caller', 'prototype', 'toString', 'valueOf', 'isStatelessFunctionalProxy', PROXY_KEY, UNWRAP_PROXY];

function transferStaticProps(ProxyComponent, savedDescriptors, PreviousComponent, NextComponent) {
  Object.getOwnPropertyNames(ProxyComponent).forEach(function (key) {
    if (RESERVED_STATICS.indexOf(key) !== -1) {
      return;
    }

    var prevDescriptor = Object.getOwnPropertyDescriptor(ProxyComponent, key);
    var savedDescriptor = savedDescriptors[key];

    if (!shallowEqual(prevDescriptor, savedDescriptor)) {
      safeDefineProperty(NextComponent, key, prevDescriptor);
    }
  });

  // Copy newly defined static methods and properties
  Object.getOwnPropertyNames(NextComponent).forEach(function (key) {
    if (RESERVED_STATICS.indexOf(key) !== -1) {
      return;
    }

    var prevDescriptor = PreviousComponent && Object.getOwnPropertyDescriptor(ProxyComponent, key);
    var savedDescriptor = savedDescriptors[key];

    // Skip redefined descriptors
    if (prevDescriptor && savedDescriptor && !shallowEqual(savedDescriptor, prevDescriptor)) {
      safeDefineProperty(NextComponent, key, prevDescriptor);
      return;
    }

    if (prevDescriptor && !savedDescriptor) {
      safeDefineProperty(ProxyComponent, key, prevDescriptor);
      return;
    }

    var nextDescriptor = _extends({}, Object.getOwnPropertyDescriptor(NextComponent, key), {
      configurable: true
    });

    savedDescriptors[key] = nextDescriptor;
    safeDefineProperty(ProxyComponent, key, nextDescriptor);
  });

  // Remove static methods and properties that are no longer defined
  Object.getOwnPropertyNames(ProxyComponent).forEach(function (key) {
    if (RESERVED_STATICS.indexOf(key) !== -1) {
      return;
    }
    // Skip statics that exist on the next class
    if (NextComponent.hasOwnProperty(key)) {
      return;
    }
    // Skip non-configurable statics
    var proxyDescriptor = Object.getOwnPropertyDescriptor(ProxyComponent, key);
    if (proxyDescriptor && !proxyDescriptor.configurable) {
      return;
    }

    var prevDescriptor = PreviousComponent && Object.getOwnPropertyDescriptor(PreviousComponent, key);
    var savedDescriptor = savedDescriptors[key];

    // Skip redefined descriptors
    if (prevDescriptor && savedDescriptor && !shallowEqual(savedDescriptor, prevDescriptor)) {
      return;
    }

    safeDefineProperty(ProxyComponent, key, {
      value: undefined
    });
  });

  return savedDescriptors;
}

function mergeComponents(ProxyComponent, NextComponent, InitialComponent, lastInstance, injectedMembers) {
  var injectedCode = {};
  try {
    var nextInstance = safeReactConstructor(NextComponent, lastInstance);

    try {
      // Bypass babel class inheritance checking
      deepPrototypeUpdate(InitialComponent, NextComponent);
    } catch (e) {
      // It was ES6 class
    }

    var proxyInstance = safeReactConstructor(ProxyComponent, lastInstance);

    if (!nextInstance || !proxyInstance) {
      return injectedCode;
    }

    var mergedAttrs = _extends({}, proxyInstance, nextInstance);
    var hasRegenerate = proxyInstance[REGENERATE_METHOD];
    var ownKeys = getOwnKeys(Object.getPrototypeOf(ProxyComponent.prototype));
    Object.keys(mergedAttrs).forEach(function (key) {
      if (key.indexOf(PREFIX) === 0) return;
      var nextAttr = nextInstance[key];
      var prevAttr = proxyInstance[key];
      if (nextAttr) {
        if (isNativeFunction(nextAttr) || isNativeFunction(prevAttr)) {
          // this is bound method
          var isSameArity = nextAttr.length === prevAttr.length;
          var existsInPrototype = ownKeys.indexOf(key) >= 0 || ProxyComponent.prototype[key];
          if ((isSameArity || !prevAttr) && existsInPrototype) {
            if (hasRegenerate) {
              injectedCode[key] = 'Object.getPrototypeOf(this)[\'' + key + '\'].bind(this)';
            } else {
              logger.warn('React Hot Loader:,', 'Non-controlled class', ProxyComponent.name, 'contains a new native or bound function ', key, nextAttr, '. Unable to reproduce');
            }
          } else {
            logger.warn('React Hot Loader:', 'Updated class ', ProxyComponent.name, 'contains native or bound function ', key, nextAttr, '. Unable to reproduce, use arrow functions instead.', '(arity: ' + nextAttr.length + '/' + prevAttr.length + ', proto: ' + (existsInPrototype ? 'yes' : 'no'));
          }
          return;
        }

        var nextString = String(nextAttr);
        var injectedBefore = injectedMembers[key];
        var isArrow = nextString.indexOf('=>') >= 0;
        var isFunction = nextString.indexOf('function') >= 0 || isArrow;
        var referToThis = nextString.indexOf('this') >= 0;
        if (nextString !== String(prevAttr) || injectedBefore && nextString !== String(injectedBefore) || isArrow && referToThis) {
          if (!hasRegenerate) {
            if (!isFunction) {
              // just copy prop over
              injectedCode[key] = nextAttr;
            } else {
              logger.warn('React Hot Loader:', ' Updated class ', ProxyComponent.name, 'had different code for', key, nextAttr, '. Unable to reproduce. Regeneration support needed.');
            }
          } else {
            injectedCode[key] = nextAttr;
          }
        }
      }
    });
  } catch (e) {
    logger.warn('React Hot Loader:', e);
  }
  return injectedCode;
}

function checkLifeCycleMethods(ProxyComponent, NextComponent) {
  try {
    var p1 = Object.getPrototypeOf(ProxyComponent.prototype);
    var p2 = NextComponent.prototype;
    reactLifeCycleMountMethods.forEach(function (key) {
      var d1 = Object.getOwnPropertyDescriptor(p1, key) || { value: p1[key] };
      var d2 = Object.getOwnPropertyDescriptor(p2, key) || { value: p2[key] };
      if (!shallowStringsEqual(d1, d2)) {
        logger.warn('React Hot Loader:', 'You did update', ProxyComponent.name, 's lifecycle method', key, '. Unable to repeat');
      }
    });
  } catch (e) {
    // Ignore errors
  }
}

function inject(target, currentGeneration, injectedMembers) {
  if (target[GENERATION] !== currentGeneration) {
    var hasRegenerate = !!target[REGENERATE_METHOD];
    Object.keys(injectedMembers).forEach(function (key) {
      try {
        if (hasRegenerate) {
          var usedThis = String(injectedMembers[key]).match(/_this([\d]+)/gi) || [];
          target[REGENERATE_METHOD](key, '(function REACT_HOT_LOADER_SANDBOX () {\n          var _this  = this; // common babel transpile\n          ' + usedThis.map(function (name) {
            return 'var ' + name + ' = this;';
          }) + '\n\n          return ' + injectedMembers[key] + ';\n          }).call(this)');
        } else {
          target[key] = injectedMembers[key];
        }
      } catch (e) {
        logger.warn('React Hot Loader: Failed to regenerate method ', key, ' of class ', target);
        logger.warn('got error', e);
      }
    });

    target[GENERATION] = currentGeneration;
  }
}

var has = Object.prototype.hasOwnProperty;

var proxies = new WeakMap();

var resetClassProxies = function resetClassProxies() {
  proxies = new WeakMap();
};

var blackListedClassMembers = ['constructor', 'render', 'componentWillMount', 'componentDidMount', 'componentDidCatch', 'componentWillReceiveProps', 'componentWillUnmount', 'hotComponentRender', 'getInitialState', 'getDefaultProps'];

var defaultRenderOptions = {
  componentWillRender: identity,
  componentDidUpdate: function componentDidUpdate(result) {
    return result;
  },
  componentDidRender: function componentDidRender(result) {
    return result;
  }
};

var filteredPrototypeMethods = function filteredPrototypeMethods(Proto) {
  return Object.getOwnPropertyNames(Proto).filter(function (prop) {
    var descriptor = Object.getOwnPropertyDescriptor(Proto, prop);
    return descriptor && prop.indexOf(PREFIX) !== 0 && blackListedClassMembers.indexOf(prop) < 0 && typeof descriptor.value === 'function';
  });
};

var defineClassMember = function defineClassMember(Class, methodName, methodBody) {
  return safeDefineProperty(Class.prototype, methodName, {
    configurable: true,
    writable: true,
    enumerable: false,
    value: methodBody
  });
};

var defineClassMembers = function defineClassMembers(Class, methods) {
  return Object.keys(methods).forEach(function (methodName) {
    return defineClassMember(Class, methodName, methods[methodName]);
  });
};

var setSFPFlag = function setSFPFlag(component, flag) {
  return safeDefineProperty(component, 'isStatelessFunctionalProxy', {
    configurable: false,
    writable: false,
    enumerable: false,
    value: flag
  });
};

var copyMethodDescriptors = function copyMethodDescriptors(target, source) {
  if (source) {
    // it is possible to use `function-double` to construct an ideal clone, but does not make a sence
    var keys = Object.getOwnPropertyNames(source);

    keys.forEach(function (key) {
      return safeDefineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
    });

    safeDefineProperty(target, 'toString', {
      configurable: true,
      writable: false,
      enumerable: false,
      value: function toString() {
        return String(source);
      }
    });
  }

  return target;
};

var knownClassComponents = [];

var forEachKnownClass = function forEachKnownClass(cb) {
  return knownClassComponents.forEach(cb);
};

function createClassProxy(InitialComponent, proxyKey) {
  var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

  var renderOptions = _extends({}, defaultRenderOptions, options);
  var proxyConfig = _extends({}, configuration, options.proxy);
  // Prevent double wrapping.
  // Given a proxy class, return the existing proxy managing it.
  var existingProxy = proxies.get(InitialComponent);

  if (existingProxy) {
    return existingProxy;
  }

  var CurrentComponent = void 0;
  var savedDescriptors = {};
  var injectedMembers = {};
  var proxyGeneration = 0;
  var classUpdatePostponed = null;
  var instancesCount = 0;
  var isFunctionalComponent = !isReactClass(InitialComponent);

  var lastInstance = null;

  function postConstructionAction() {
    this[GENERATION] = 0;

    lastInstance = this;
    // is there is an update pending
    if (classUpdatePostponed) {
      var callUpdate = classUpdatePostponed;
      classUpdatePostponed = null;
      callUpdate();
    }
    // As long we can't override constructor
    // every class shall evolve from a base class
    inject(this, proxyGeneration, injectedMembers);
  }

  function proxiedUpdate() {
    if (this) {
      inject(this, proxyGeneration, injectedMembers);
    }
  }

  function lifeCycleWrapperFactory(wrapperName) {
    var sideEffect = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : identity;

    return copyMethodDescriptors(function wrappedMethod() {
      proxiedUpdate.call(this);
      sideEffect(this);

      for (var _len = arguments.length, rest = Array(_len), _key = 0; _key < _len; _key++) {
        rest[_key] = arguments[_key];
      }

      return !isFunctionalComponent && CurrentComponent.prototype[wrapperName] && CurrentComponent.prototype[wrapperName].apply(this, rest);
    }, InitialComponent.prototype && InitialComponent.prototype[wrapperName]);
  }

  function methodWrapperFactory(wrapperName, realMethod) {
    return copyMethodDescriptors(function wrappedMethod() {
      for (var _len2 = arguments.length, rest = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        rest[_key2] = arguments[_key2];
      }

      return realMethod.apply(this, rest);
    }, realMethod);
  }

  var fakeBasePrototype = function fakeBasePrototype(Proto) {
    return filteredPrototypeMethods(Proto).reduce(function (acc, key) {
      acc[key] = methodWrapperFactory(key, Proto[key]);
      return acc;
    }, {});
  };

  var componentDidMount = lifeCycleWrapperFactory('componentDidMount', function (target) {
    target[PROXY_IS_MOUNTED] = true;
    target[RENDERED_GENERATION] = get$1();
    instancesCount++;
  });
  var componentDidUpdate = lifeCycleWrapperFactory('componentDidUpdate', renderOptions.componentDidUpdate);
  var componentWillUnmount = lifeCycleWrapperFactory('componentWillUnmount', function (target) {
    target[PROXY_IS_MOUNTED] = false;
    instancesCount--;
  });

  function hotComponentRender() {
    // repeating subrender call to keep RENDERED_GENERATION up to date
    renderOptions.componentWillRender(this);
    proxiedUpdate.call(this);
    var result = void 0;

    // We need to use hasOwnProperty here, as the cached result is a React node
    // and can be null or some other falsy value.
    if (has.call(this, CACHED_RESULT)) {
      result = this[CACHED_RESULT];
      delete this[CACHED_RESULT];
    } else if (isFunctionalComponent) {
      result = CurrentComponent(this.props, this.context);
    } else {
      var renderMethod = CurrentComponent.prototype.render || this.render;
      /* eslint-disable no-use-before-define */
      if (renderMethod === proxiedRender) {
        throw new Error('React-Hot-Loader: you are trying to render Component without .render method');
      }
      /* eslint-enable */
      result = renderMethod.apply(this,
      // eslint-disable-next-line prefer-rest-params
      arguments);
    }

    return renderOptions.componentDidRender.call(this, result);
  }

  function hotComponentUpdate() {
    renderOptions.componentWillRender(this);
    proxiedUpdate.call(this);
  }

  function proxiedRender() {
    renderOptions.componentWillRender(this);

    for (var _len3 = arguments.length, args = Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
      args[_key3] = arguments[_key3];
    }

    return hotComponentRender.call.apply(hotComponentRender, [this].concat(args));
  }

  var defineProxyMethods = function defineProxyMethods(Proxy) {
    var Base = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

    defineClassMembers(Proxy, _extends({}, fakeBasePrototype(Base), proxyConfig.pureRender ? {} : { render: proxiedRender }, {
      hotComponentRender: hotComponentRender,
      hotComponentUpdate: hotComponentUpdate,
      componentDidMount: componentDidMount,
      componentDidUpdate: componentDidUpdate,
      componentWillUnmount: componentWillUnmount
    }));
  };

  var _ProxyFacade = void 0;
  var ProxyComponent = null;
  var proxy = void 0;

  if (!isFunctionalComponent) {
    // Component
    ProxyComponent = proxyClassCreator(InitialComponent, postConstructionAction);

    defineProxyMethods(ProxyComponent, InitialComponent.prototype);

    knownClassComponents.push(ProxyComponent);

    _ProxyFacade = ProxyComponent;
  } else if (!proxyConfig.allowSFC) {
    proxyConfig.pureRender = false;
    // SFC Converted to component. Does not support returning precreated instances from render.
    ProxyComponent = proxyClassCreator(React.Component, postConstructionAction);

    defineProxyMethods(ProxyComponent);
    _ProxyFacade = ProxyComponent;
  } else {
    // SFC

    // This function only gets called for the initial mount. The actual
    // rendered component instance will be the return value.

    // eslint-disable-next-line func-names
    _ProxyFacade = function ProxyFacade(props, context) {
      /*
         ! THIS IS NOT YOUR COMPONENT !
        !  THIS IS REACT-HOT-LOADER  !
         And you are probably looking for a function component of yours
        It's hidden, but there is a way to fix this - just reconfigure your application a bit
        see https://github.com/gaearon/react-hot-loader/issues/1311
        */

      var result = CurrentComponent(props, context);

      // This is a Relay-style container constructor. We can't do the prototype-
      // style wrapping for this as we do elsewhere, so just we just pass it
      // through as-is.
      if (isReactClassInstance(result)) {
        ProxyComponent = null;

        // Relay lazily sets statics like getDerivedStateFromProps on initial
        // render in lazy construction, so we need to do the same here.
        transferStaticProps(_ProxyFacade, savedDescriptors, null, CurrentComponent);

        return result;
      }

      // simple SFC, could continue to be SFC
      if (proxyConfig.pureSFC) {
        if (!CurrentComponent.contextTypes) {
          if (!_ProxyFacade.isStatelessFunctionalProxy) {
            setSFPFlag(_ProxyFacade, true);
          }

          return renderOptions.componentDidRender(result);
        }
      }
      setSFPFlag(_ProxyFacade, false);
      proxyConfig.pureRender = false;

      // Otherwise, it's a normal functional component. Build the real proxy
      // and use it going forward.
      ProxyComponent = proxyClassCreator(React.Component, postConstructionAction);

      defineProxyMethods(ProxyComponent);

      var determinateResult = new ProxyComponent(props, context);

      // Cache the initial render result so we don't call the component function
      // a second time for the initial render.
      determinateResult[CACHED_RESULT] = result;
      return determinateResult;
    };
  }

  function get$$1() {
    return _ProxyFacade;
  }

  function getCurrent() {
    return CurrentComponent;
  }

  safeDefineProperty(_ProxyFacade, UNWRAP_PROXY, {
    configurable: false,
    writable: false,
    enumerable: false,
    value: getCurrent
  });

  safeDefineProperty(_ProxyFacade, PROXY_KEY, {
    configurable: false,
    writable: false,
    enumerable: false,
    value: proxyKey
  });

  safeDefineProperty(_ProxyFacade, 'toString', {
    configurable: true,
    writable: false,
    enumerable: false,
    value: function toString() {
      return String(CurrentComponent);
    }
  });

  function update(NextComponent) {
    if (typeof NextComponent !== 'function') {
      throw new Error('Expected a constructor.');
    }

    if (NextComponent === CurrentComponent) {
      return false;
    }

    // Prevent proxy cycles
    var existingProxy = proxies.get(NextComponent);
    if (existingProxy) {
      return false;
    }

    isFunctionalComponent = !isReactClass(NextComponent);

    proxies.set(NextComponent, proxy);

    proxyGeneration++;

    // Save the next constructor so we call it
    var PreviousComponent = CurrentComponent;
    CurrentComponent = NextComponent;

    // Try to infer displayName
    var displayName = getComponentDisplayName(CurrentComponent);

    safeDefineProperty(_ProxyFacade, 'displayName', {
      configurable: true,
      writable: false,
      enumerable: true,
      value: displayName
    });

    if (ProxyComponent) {
      safeDefineProperty(ProxyComponent, 'name', {
        value: displayName
      });
    }

    savedDescriptors = transferStaticProps(_ProxyFacade, savedDescriptors, PreviousComponent, NextComponent);

    if (isFunctionalComponent || !ProxyComponent) ; else {
      var classHotReplacement = function classHotReplacement() {
        checkLifeCycleMethods(ProxyComponent, NextComponent);
        if (proxyGeneration > 1) {
          getElementCloseHook(ProxyComponent);
          filteredPrototypeMethods(ProxyComponent.prototype).forEach(function (methodName) {
            if (!has.call(NextComponent.prototype, methodName)) {
              delete ProxyComponent.prototype[methodName];
            }
          });
        }
        Object.setPrototypeOf(ProxyComponent.prototype, NextComponent.prototype);
        defineProxyMethods(ProxyComponent, NextComponent.prototype);
        if (proxyGeneration > 1) {
          injectedMembers = mergeComponents(ProxyComponent, NextComponent, InitialComponent, lastInstance, injectedMembers);
          getElementComparisonHook(ProxyComponent);
        }
      };

      // Was constructed once
      if (instancesCount > 0) {
        classHotReplacement();
      } else {
        classUpdatePostponed = classHotReplacement;
      }
    }

    return true;
  }

  update(InitialComponent);

  var dereference = function dereference() {
    proxies.delete(InitialComponent);
    proxies.delete(_ProxyFacade);
    proxies.delete(CurrentComponent);
  };

  proxy = { get: get$$1, update: update, dereference: dereference, getCurrent: function getCurrent() {
      return CurrentComponent;
    } };

  proxies.set(InitialComponent, proxy);
  proxies.set(_ProxyFacade, proxy);

  safeDefineProperty(proxy, UNWRAP_PROXY, {
    configurable: false,
    writable: false,
    enumerable: false,
    value: getCurrent
  });

  return proxy;
}

// this counter tracks `register` invocations.
// works good, but code splitting is breaking it
var generation = 1;

// these counters are aimed to mitigate the "first render"
var hotComparisonCounter = 0;
var hotComparisonRuns = 0;
var hotReplacementGeneration = 0;

var nullFunction = function nullFunction() {
  return {};
};

// these callbacks would be called on component update
var onHotComparisonOpen = nullFunction;
var onHotComparisonElement = nullFunction;
var onHotComparisonClose = nullFunction;

// inversion of control
var setComparisonHooks = function setComparisonHooks(open, element, close) {
  onHotComparisonOpen = open;
  onHotComparisonElement = element;
  onHotComparisonClose = close;
};

var getElementComparisonHook = function getElementComparisonHook(component) {
  return onHotComparisonElement(component);
};
var getElementCloseHook = function getElementCloseHook(component) {
  return onHotComparisonClose(component);
};

var hotComparisonOpen = function hotComparisonOpen() {
  return hotComparisonCounter > 0 && hotComparisonRuns > 0 && hotReplacementGeneration > 0;
};

var openGeneration = function openGeneration() {
  return forEachKnownClass(onHotComparisonElement);
};

var closeGeneration = function closeGeneration() {
  return forEachKnownClass(onHotComparisonClose);
};

var incrementHot = function incrementHot() {
  if (!hotComparisonCounter) {
    openGeneration();
    onHotComparisonOpen();
  }
  hotComparisonCounter++;
};
var decrementHot = function decrementHot() {
  hotComparisonCounter--;
  if (!hotComparisonCounter) {
    closeGeneration();
    hotComparisonRuns++;
  }
};

// TODO: shall it be called from incrementHotGeneration?
var enterHotUpdate = function enterHotUpdate() {
  Promise.resolve(incrementHot()).then(function () {
    return setTimeout(decrementHot, 0);
  });
};

// TODO: deprecate?
var increment = function increment() {
  enterHotUpdate();
  return generation++;
};
var get$1 = function get() {
  return generation;
};

// These counters tracks HMR generations, and probably should be used instead of the old one
var incrementHotGeneration = function incrementHotGeneration() {
  return hotReplacementGeneration++;
};
var getHotGeneration = function getHotGeneration() {
  return hotReplacementGeneration;
};

// some `empty` names, React can autoset display name to...
var UNDEFINED_NAMES = {
  Unknown: true,
  Component: true
};

var areNamesEqual = function areNamesEqual(a, b) {
  return a === b || UNDEFINED_NAMES[a] && UNDEFINED_NAMES[b];
};

var isFunctional = function isFunctional(fn) {
  return typeof fn === 'function';
};
var getTypeOf = function getTypeOf(type) {
  if (isReactClass(type)) return 'ReactComponent';
  if (isFunctional(type)) return 'StatelessFunctional';
  return 'Fragment'; // ?
};

function clearStringFast(str) {
  return str.length < 12 ? str : (' ' + str).slice(1);
}

var haveTextSimilarity = function haveTextSimilarity(a, b) {
  return (
    // equal or slight changed
    a === b || levenshtein.get(clearStringFast(a), clearStringFast(b)) < a.length * 0.2
  );
};

var getBaseProto = function getBaseProto(source) {
  return source.prototype.hotComponentRender ? Object.getPrototypeOf(source.prototype) : source.prototype;
};

var equalClasses = function equalClasses(a, b) {
  var prototypeA = getBaseProto(a);
  var prototypeB = getBaseProto(b);

  var hits = 0;
  var misses = 0;
  var comparisons = 0;
  Object.getOwnPropertyNames(prototypeA).forEach(function (key) {
    var descriptorA = Object.getOwnPropertyDescriptor(prototypeA, key);
    var valueA = descriptorA && (descriptorA.value || descriptorA.get || descriptorA.set);
    var descriptorB = Object.getOwnPropertyDescriptor(prototypeB, key);
    var valueB = descriptorB && (descriptorB.value || descriptorB.get || descriptorB.set);

    if (typeof valueA === 'function' && key !== 'constructor') {
      comparisons++;
      if (haveTextSimilarity(String(valueA), String(valueB))) {
        hits++;
      } else {
        misses++;
        if (key === 'render') {
          misses++;
        }
      }
    }
  });
  // allow to add or remove one function
  return hits > 0 && misses <= 1 || comparisons === 0;
};

var areSwappable = function areSwappable(a, b) {
  // both are registered components and have the same name
  if (getIdByType(b) && getIdByType(a) === getIdByType(b)) {
    return true;
  }
  if (getTypeOf(a) !== getTypeOf(b)) {
    return false;
  }
  if (isReactClass(a)) {
    return areNamesEqual(getComponentDisplayName(a), getComponentDisplayName(b)) && equalClasses(a, b);
  }

  if (isFunctional(a)) {
    var nameA = getComponentDisplayName(a);
    if (!areNamesEqual(nameA, getComponentDisplayName(b))) {
      return false;
    }
    return nameA !== 'Component' || haveTextSimilarity(String(a), String(b));
  }
  return false;
};

function merge() {
  var acc = {};

  for (var _len = arguments.length, sources = Array(_len), _key = 0; _key < _len; _key++) {
    sources[_key] = arguments[_key];
  }

  for (var _iterator = sources, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
    var _ref;

    if (_isArray) {
      if (_i >= _iterator.length) break;
      _ref = _iterator[_i++];
    } else {
      _i = _iterator.next();
      if (_i.done) break;
      _ref = _i.value;
    }

    var source = _ref;

    if (source instanceof Array) {
      if (!(acc instanceof Array)) {
        acc = [];
      }
      acc = [].concat(acc, source);
    } else if (source instanceof Object) {
      for (var _iterator2 = Object.keys(source), _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
        var _babelHelpers$extends;

        var _ref2;

        if (_isArray2) {
          if (_i2 >= _iterator2.length) break;
          _ref2 = _iterator2[_i2++];
        } else {
          _i2 = _iterator2.next();
          if (_i2.done) break;
          _ref2 = _i2.value;
        }

        var key = _ref2;

        var value = source[key];
        if (value instanceof Object && key in acc) {
          value = merge(acc[key], value);
        }
        acc = _extends({}, acc, (_babelHelpers$extends = {}, _babelHelpers$extends[key] = value, _babelHelpers$extends));
      }
    }
  }
  return acc;
}

var signatures = void 0;
var proxiesByID = void 0;
var blackListedProxies = void 0;
var registeredComponents = void 0;
var idsByType = void 0;

var elementCount = 0;
var renderOptions = {};

var componentOptions = void 0;

var generateTypeId = function generateTypeId() {
  return 'auto-' + elementCount++;
};

var getIdByType = function getIdByType(type) {
  return idsByType.get(type);
};
var isProxyType = function isProxyType(type) {
  return type[PROXY_KEY];
};

var getProxyById = function getProxyById(id) {
  return proxiesByID[id];
};
var getProxyByType = function getProxyByType(type) {
  return getProxyById(getIdByType(type));
};

var registerComponent = function registerComponent(type) {
  return registeredComponents.set(type, 1);
};
var isRegisteredComponent = function isRegisteredComponent(type) {
  return registeredComponents.has(type);
};

var setStandInOptions = function setStandInOptions(options) {
  renderOptions = options;
};

var updateFunctionProxyById = function updateFunctionProxyById(id, type, updater) {
  // Remember the ID.
  idsByType.set(type, id);
  var proxy = proxiesByID[id];
  if (!proxy) {
    proxiesByID[id] = type;
  }
  updater(proxiesByID[id], type);
  // proxiesByID[id] = type; // keep the first ref

  return proxiesByID[id];
};

var updateProxyById = function updateProxyById(id, type) {
  var options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};

  if (!id) {
    return null;
  }
  // Remember the ID.
  idsByType.set(type, id);

  if (!proxiesByID[id]) {
    proxiesByID[id] = createClassProxy(type, id, merge({}, renderOptions, { proxy: componentOptions.get(type) || {} }, options));
  } else if (proxiesByID[id].update(type)) {
    // proxy could be registered again only in case of HMR
    incrementHotGeneration();
  }
  return proxiesByID[id];
};

var createProxyForType = function createProxyForType(type, options) {
  return getProxyByType(type) || updateProxyById(generateTypeId(), type, options);
};

var isColdType = function isColdType(type) {
  return blackListedProxies.has(type);
};

var isTypeBlacklisted = function isTypeBlacklisted(type) {
  return isColdType(type) || isCompositeComponent(type) && (configuration.ignoreSFC && !isReactClass(type) || configuration.ignoreComponents && isReactClass(type));
};
var blacklistByType = function blacklistByType(type) {
  return blackListedProxies.set(type, true);
};

var setComponentOptions = function setComponentOptions(component, options) {
  return componentOptions.set(component, options);
};

var addSignature = function addSignature(type, signature) {
  return signatures.set(type, signature);
};
var getSignature = function getSignature(type) {
  return signatures.get(type);
};

var resetProxies = function resetProxies() {
  proxiesByID = {};
  idsByType = new WeakMap();
  blackListedProxies = new WeakMap();
  registeredComponents = new WeakMap();
  componentOptions = new WeakMap();
  signatures = new WeakMap();
  resetClassProxies();
};

resetProxies();

var tune = {
  allowSFC: false
};

var preactAdapter = function preactAdapter(instance, resolveType) {
  var oldHandler = instance.options.vnode;

  setConfiguration(tune);

  instance.options.vnode = function (vnode) {
    if (vnode.type) {
      vnode.type = resolveType(vnode.type);
    } else if (vnode.nodeName) {
      vnode.nodeName = resolveType(vnode.nodeName);
    }
    if (oldHandler) {
      oldHandler(vnode);
    }
  };
};

/* global document */

var lastError = [];

var overlayStyle = {
  position: 'fixed',
  left: 0,
  top: 0,
  right: 0,

  backgroundColor: 'rgba(255,200,200,0.9)',

  color: '#000',
  fontFamily: '-apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif',
  fontSize: '12px',
  margin: 0,
  padding: '16px',
  maxHeight: '50%',
  overflow: 'auto',
  zIndex: 10000
};

var inlineErrorStyle = {
  backgroundColor: '#FEE'
};

var liCounter = {
  position: 'absolute',
  left: '10px'
};

var listStyle = {};

var EmptyErrorPlaceholder = function EmptyErrorPlaceholder(_ref) {
  var component = _ref.component;
  return React__default.createElement(
    'span',
    { style: inlineErrorStyle, role: 'img', 'aria-label': 'Rect-Hot-Loader Error' },
    '\u269B\uFE0F\uD83D\uDD25\uD83E\uDD15 (',
    component ? getComponentDisplayName(component.constructor || component) : 'Unknown location',
    ')',
    component && component.retryHotLoaderError && React__default.createElement(
      'button',
      { onClick: function onClick() {
          return component.retryHotLoaderError();
        }, title: 'Retry' },
      '\u27F3'
    )
  );
};

var errorHeader = function errorHeader(component, componentStack) {
  if (component || componentStack) {
    return React__default.createElement(
      'span',
      null,
      '(',
      component ? getComponentDisplayName(component.constructor || component) : 'Unknown location',
      component && ', ',
      componentStack && componentStack.split('\n').filter(Boolean)[0],
      ')'
    );
  }
  return null;
};

var mapError = function mapError(_ref2) {
  var error = _ref2.error,
      errorInfo = _ref2.errorInfo,
      component = _ref2.component;

  if (!error) {
    error = { message: 'undefined error' };
  }

  return React__default.createElement(
    React__default.Fragment,
    null,
    React__default.createElement(
      'p',
      { style: { color: 'red' } },
      errorHeader(component, errorInfo && errorInfo.componentStack),
      ' ',
      error.toString ? error.toString() : error && error.message || 'undefined error'
    ),
    errorInfo && errorInfo.componentStack ? React__default.createElement(
      'div',
      null,
      React__default.createElement(
        'div',
        null,
        'Stack trace:'
      ),
      React__default.createElement(
        'ul',
        { style: { color: 'red', marginTop: '10px' } },
        error.stack.split('\n').slice(1, 2).map(function (line, i) {
          return React__default.createElement(
            'li',
            { key: String(i) },
            line
          );
        }),
        React__default.createElement('hr', null),
        errorInfo.componentStack.split('\n').filter(Boolean).map(function (line, i) {
          return React__default.createElement(
            'li',
            { key: String(i) },
            line
          );
        })
      )
    ) : error.stack && React__default.createElement(
      'div',
      null,
      React__default.createElement(
        'div',
        null,
        'Stack trace:'
      ),
      React__default.createElement(
        'ul',
        { style: { color: 'red', marginTop: '10px' } },
        error.stack.split('\n').map(function (line, i) {
          return React__default.createElement(
            'li',
            { key: String(i) },
            line
          );
        })
      )
    )
  );
};

var ErrorOverlay = function (_React$Component) {
  inherits(ErrorOverlay, _React$Component);

  function ErrorOverlay() {
    var _temp, _this, _ret;

    classCallCheck(this, ErrorOverlay);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = possibleConstructorReturn(this, _React$Component.call.apply(_React$Component, [this].concat(args))), _this), _this.state = {
      visible: true
    }, _this.toggle = function () {
      return _this.setState({ visible: !_this.state.visible });
    }, _this.retry = function () {
      return _this.setState(function () {
        var errors = _this.props.errors;

        enterHotUpdate();
        clearExceptions();
        errors.map(function (_ref3) {
          var component = _ref3.component;
          return component;
        }).filter(Boolean).filter(function (_ref4) {
          var retryHotLoaderError = _ref4.retryHotLoaderError;
          return !!retryHotLoaderError;
        }).forEach(function (component) {
          return component.retryHotLoaderError();
        });

        return {};
      });
    }, _temp), possibleConstructorReturn(_this, _ret);
  }

  ErrorOverlay.prototype.render = function render() {
    var errors = this.props.errors;

    if (!errors.length) {
      return null;
    }
    var visible = this.state.visible;

    return React__default.createElement(
      'div',
      { style: overlayStyle },
      React__default.createElement(
        'h2',
        { style: { margin: 0 } },
        '\u269B\uFE0F\uD83D\uDD25\uD83D\uDE2D: hot update was not successful ',
        React__default.createElement(
          'button',
          { onClick: this.toggle },
          visible ? 'collapse' : 'expand'
        ),
        React__default.createElement(
          'button',
          { onClick: this.retry },
          'Retry'
        )
      ),
      visible && React__default.createElement(
        'ul',
        { style: listStyle },
        errors.map(function (err, i) {
          return React__default.createElement(
            'li',
            { key: i },
            React__default.createElement(
              'span',
              { style: liCounter },
              '(',
              i + 1,
              '/',
              errors.length,
              ')'
            ),
            mapError(err)
          );
        })
      )
    );
  };

  return ErrorOverlay;
}(React__default.Component);

var initErrorOverlay = function initErrorOverlay() {
  if (typeof document === 'undefined' || !document.body) {
    return;
  }
  var div = document.querySelector('.react-hot-loader-error-overlay');
  if (!div) {
    div = document.createElement('div');
    div.className = 'react-hot-loader-error-overlay';
    document.body.appendChild(div);
  }
  if (lastError.length) {
    var Overlay = configuration.ErrorOverlay || ErrorOverlay;
    ReactDOM.render(React__default.createElement(Overlay, { errors: lastError }), div);
  } else {
    div.parentNode.removeChild(div);
  }
};

function clearExceptions() {
  if (lastError.length) {
    lastError = [];
    initErrorOverlay();
  }
}

function logException(error, errorInfo, component) {
  // do not suppress error

  /* eslint-disable no-console */
  console.error(error);
  /* eslint-enable */

  lastError.push({ error: error, errorInfo: errorInfo, component: component });
  initErrorOverlay();
}

/* eslint-disable no-underscore-dangle */

var hotRenderWithHooks = ReactDOM.hotRenderWithHooks || function (fiber, render) {
  return render();
};

function pushStack(stack, node) {
  stack.type = node.type;
  stack.elementType = node.elementType || node.type;
  stack.children = [];
  stack.instance = typeof node.type === 'function' ? node.stateNode : stack;
  stack.fiber = node;

  if (!stack.instance) {
    stack.instance = {
      SFC_fake: stack.type,
      props: {},
      render: function render() {
        return hotRenderWithHooks(node, function () {
          return stack.type(stack.instance.props);
        });
      }
    };
  }
}

function hydrateFiberStack(node, stack) {
  pushStack(stack, node);
  if (node.child) {
    var child = node.child;

    do {
      var childStack = {};
      hydrateFiberStack(child, childStack);
      stack.children.push(childStack);
      child = child.sibling;
    } while (child);
  }
}

/* eslint-disable no-underscore-dangle */

function pushState(stack, type, instance) {
  stack.type = type;
  stack.elementType = type;
  stack.children = [];
  stack.instance = instance || stack;

  if (typeof type === 'function' && type.isStatelessFunctionalProxy) {
    // In React 15 SFC is wrapped by component. We have to detect our proxies and change the way it works
    stack.instance = {
      SFC_fake: type,
      props: {},
      render: function render() {
        return type(stack.instance.props);
      }
    };
  }
}

function hydrateLegacyStack(node, stack) {
  if (node._currentElement) {
    pushState(stack, node._currentElement.type, node._instance || stack);
  }

  if (node._renderedComponent) {
    var childStack = {};
    hydrateLegacyStack(node._renderedComponent, childStack);
    stack.children.push(childStack);
  } else if (node._renderedChildren) {
    Object.keys(node._renderedChildren).forEach(function (key) {
      var childStack = {};
      hydrateLegacyStack(node._renderedChildren[key], childStack);
      stack.children.push(childStack);
    });
  }
}

var shouldNotPatchComponent = function shouldNotPatchComponent(type) {
  return isTypeBlacklisted(type);
};

function resolveUtility(type) {
  // all "utility" types are resolved to their __initial__ shapes
  // that enables to never change reference to them, and gives the ability to maintain React Tree on HMR

  // all operations could be skipped with react-hot-dom enabled

  if ((typeof type === 'undefined' ? 'undefined' : _typeof(type)) === 'object') {
    if (configuration.integratedComparator) {
      return type;
    }
    var element = { type: type };
    if (isLazyType(element) || isMemoType(element) || isForwardType(element) || isContextType(element)) {
      return getProxyByType(type) || type;
    }
  }

  return undefined;
}

function resolveComponent(type) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  var existingProxy = getProxyByType(type);

  // cold API
  if (shouldNotPatchComponent(type)) {
    return existingProxy ? existingProxy.getCurrent() : type;
  }

  if (!existingProxy && configuration.onComponentCreate) {
    configuration.onComponentCreate(type, getComponentDisplayName(type));
    if (shouldNotPatchComponent(type)) {
      return type;
    }
  }

  var proxy = internalConfiguration.disableProxyCreation ? existingProxy : createProxyForType(type, options);

  return proxy ? proxy.get() : undefined;
}

function resolveProxy(type) {
  if (isProxyType(type)) {
    return type;
  }

  return undefined;
}

function resolveNotComponent(type) {
  if (!isCompositeComponent(type)) {
    return type;
  }

  return undefined;
}

var getLatestTypeVersion = function getLatestTypeVersion(type) {
  var existingProxy = getProxyByType(type);
  return existingProxy && existingProxy.getCurrent && existingProxy.getCurrent();
};

var resolveSimpleType = function resolveSimpleType(type) {
  if (!type) {
    return type;
  }

  var simpleResult = resolveProxy(type) || resolveUtility(type) || resolveNotComponent(type);
  if (simpleResult) {
    return simpleResult;
  }

  var lastType = getLatestTypeVersion(type);

  // only lazy loaded components any now failing into this branch

  // if (lastType && lastType !== type) {
  //   console.warn('RHL: used type', type, 'is obsolete. Something is wrong with HMR.');
  // }

  return lastType || type;
};

var resolveType = function resolveType(type) {
  var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

  if (!type) {
    return type;
  }

  return resolveProxy(type) || resolveUtility(type) || resolveNotComponent(type) || resolveComponent(type, options) || type;
};

/* eslint-disable no-underscore-dangle */

function getReactStack(instance) {
  var rootNode = getInternalInstance(instance);
  var stack = {};
  if (rootNode) {
    // React stack
    var isFiber = typeof rootNode.tag === 'number';
    if (isFiber) {
      hydrateFiberStack(rootNode, stack);
    } else {
      hydrateLegacyStack(rootNode, stack);
    }
  }

  return stack;
}

var markUpdate = function markUpdate(_ref) {
  var fiber = _ref.fiber;

  // do not update what we should not
  if (!fiber || typeof fiber.type === 'string') {
    return;
  }

  var mostResentType = resolveType(fiber.type) || fiber.type;
  fiber.type = mostResentType;
  // do not change fiber.elementType to keep old information for the hot-update

  fiber.expirationTime = 1;
  if (fiber.alternate) {
    fiber.alternate.expirationTime = 1;
    fiber.alternate.type = fiber.type;
  }

  if (fiber.memoizedProps && _typeof(fiber.memoizedProps) === 'object') {
    fiber.memoizedProps = _extends({
      cacheBusterProp: true
    }, fiber.memoizedProps);
  }

  if (fiber.stateNode) ;
};

var cleanupReact = function cleanupReact() {
  if (ReactDOM.hotCleanup) {
    ReactDOM.hotCleanup();
  }
};

var deepMarkUpdate = function deepMarkUpdate(stack) {
  markUpdate(stack);
  if (stack.children) {
    stack.children.forEach(deepMarkUpdate);
  }
};

var renderStack = [];

var stackReport = function stackReport() {
  var rev = renderStack.slice().reverse();
  logger.warn('in', rev[0].name, rev);
};

var emptyMap = new Map();
var stackContext = function stackContext() {
  return (renderStack[renderStack.length - 1] || {}).context || emptyMap;
};

var shouldUseRenderMethod = function shouldUseRenderMethod(fn) {
  return fn && (isReactClassInstance(fn) || fn.SFC_fake);
};

var getElementType$1 = function getElementType$$1(child) {
  return child.type[UNWRAP_PROXY] ? child.type[UNWRAP_PROXY]() : child.type;
};

var filterNullArray = function filterNullArray(a) {
  if (!a) return [];
  return a.filter(function (x) {
    return !!x;
  });
};

var unflatten = function unflatten(a) {
  return a.reduce(function (acc, a) {
    if (Array.isArray(a)) {
      acc.push.apply(acc, unflatten(a));
    } else {
      acc.push(a);
    }
    return acc;
  }, []);
};

var isArray = function isArray(fn) {
  return Array.isArray(fn);
};
var asArray = function asArray(a) {
  return isArray(a) ? a : [a];
};

var render = function render(component, stack) {
  if (!component) {
    return [];
  }
  if (component.hotComponentUpdate) {
    component.hotComponentUpdate();
  }
  if (shouldUseRenderMethod(component)) {
    // not calling real render method to prevent call recursion.
    // stateless components does not have hotComponentRender
    return component.hotComponentRender ? component.hotComponentRender() : component.render();
  }
  if (isForwardType(component)) {
    // render forward type in a sandbox
    return hotRenderWithHooks(stack.fiber, function () {
      return component.type.render(component.props, null);
    });
  }
  if (isArray(component)) {
    return component.map(render);
  }
  if (component.children) {
    return component.children;
  }

  return [];
};

var NO_CHILDREN = { children: [] };
var mapChildren = function mapChildren(children, instances) {
  return {
    children: children.filter(function (c) {
      return c;
    }).map(function (child, index) {
      if ((typeof child === 'undefined' ? 'undefined' : _typeof(child)) !== 'object' || child.isMerged) {
        return child;
      }
      var instanceLine = instances[index] || {};
      var oldChildren = asArray(instanceLine.children || []);

      if (Array.isArray(child)) {
        return _extends({
          type: null
        }, mapChildren(child, oldChildren));
      }

      var newChildren = asArray(child.props && child.props.children || child.children || []);
      var nextChildren = child.type !== 'function' && oldChildren.length && mapChildren(newChildren, oldChildren);

      return _extends({
        nextProps: child.props,
        isMerged: true
      }, instanceLine, nextChildren || {}, {
        type: child.type
      });
    })
  };
};

var mergeInject = function mergeInject(a, b, instance) {
  if (a && !Array.isArray(a)) {
    return mergeInject([a], b);
  }
  if (b && !Array.isArray(b)) {
    return mergeInject(a, [b]);
  }

  if (!a || !b) {
    return NO_CHILDREN;
  }
  if (a.length === b.length) {
    return mapChildren(a, b);
  }

  // in some cases (no confidence here) B could contain A except null children
  // in some cases - could not.
  // this depends on React version and the way you build component.

  var nonNullA = filterNullArray(a);
  if (nonNullA.length === b.length) {
    return mapChildren(nonNullA, b);
  }

  var flatA = unflatten(nonNullA);
  var flatB = unflatten(b);
  if (flatA.length === flatB.length) {
    return mapChildren(flatA, flatB);
  }
  if (flatB.length === 0 && flatA.length === 1 && _typeof(flatA[0]) !== 'object') ; else if (!configuration.IS_REACT_MERGE_ENABLED) {
    logger.warn('React-hot-loader: unable to merge ', a, 'and children of ', instance);
    stackReport();
  }
  return NO_CHILDREN;
};

var transformFlowNode = function transformFlowNode(flow) {
  return flow.reduce(function (acc, node) {
    if (node && isFragmentNode(node)) {
      if (node.props && node.props.children) {
        return [].concat(acc, filterNullArray(asArray(node.props.children)));
      }
      if (node.children) {
        return [].concat(acc, filterNullArray(asArray(node.children)));
      }
    }
    return [].concat(acc, [node]);
  }, []);
};

var scheduledUpdates = [];
var scheduledUpdate = 0;

var flushScheduledUpdates = function flushScheduledUpdates() {
  var instances = scheduledUpdates;
  scheduledUpdates = [];
  scheduledUpdate = 0;
  instances.forEach(function (instance) {
    return instance[PROXY_IS_MOUNTED] && updateInstance(instance);
  });
};

var unscheduleUpdate = function unscheduleUpdate(instance) {
  scheduledUpdates = scheduledUpdates.filter(function (inst) {
    return inst !== instance;
  });
};

var scheduleInstanceUpdate = function scheduleInstanceUpdate(instance) {
  scheduledUpdates.push(instance);
  if (!scheduledUpdate) {
    scheduledUpdate = setTimeout(flushScheduledUpdates, 4);
  }
};

var hotReplacementRender = function hotReplacementRender(instance, stack) {
  if (isReactClassInstance(instance)) {
    var type = getElementType$1(stack);

    renderStack.push({
      name: getComponentDisplayName(type),
      type: type,
      props: stack.instance.props,
      context: stackContext()
    });
  }

  try {
    var flow = transformFlowNode(filterNullArray(asArray(render(instance, stack))));

    var children = stack.children;


    flow.forEach(function (child, index) {
      var childType = child.type;
      var stackChild = children[index];
      var next = function next(instance) {
        // copy over props as long new component may be hidden inside them
        // child does not have all props, as long some of them can be calculated on componentMount.
        var realProps = instance.props;
        var nextProps = _extends({}, realProps, child.nextProps || {}, child.props || {});

        if (isReactClassInstance(instance) && instance.componentWillUpdate) {
          // Force-refresh component (bypass redux renderedComponent)
          instance.componentWillUpdate(_extends({}, realProps), instance.state);
        }
        instance.props = nextProps;
        hotReplacementRender(instance, stackChild);
        instance.props = realProps;
      };

      // text node
      if ((typeof child === 'undefined' ? 'undefined' : _typeof(child)) !== 'object' || !stackChild || !stackChild.instance) {
        if (stackChild && stackChild.children && stackChild.children.length) {
          logger.error('React-hot-loader: reconciliation failed', 'could not dive into [', child, '] while some elements are still present in the tree.');
          stackReport();
        }
        return;
      }

      // comparing rendered type to fiber.ElementType
      if ((typeof childType === 'undefined' ? 'undefined' : _typeof(childType)) !== _typeof(stackChild.elementType)) {
        // Portals could generate undefined !== null
        if (childType && stackChild.type) {
          logger.warn('React-hot-loader: got ', childType, 'instead of', stackChild.type);
          stackReport();
        }
        return;
      }

      if (isMemoType(child) || isLazyType(child)) {
        // force update memo children
        if (stackChild.children && stackChild.children[0]) {
          scheduleInstanceUpdate(stackChild.children[0].instance);
        }
        childType = childType.type || childType;
      }

      if (isForwardType(child)) {
        next(stackChild.instance);
      } else if (isContextConsumer(child)) {
        try {
          var contextValue = stackContext().get(getContextProvider(childType));
          next({
            children: (child.props ? child.props.children : child.children[0])(contextValue !== undefined ? contextValue : childType[CONTEXT_CURRENT_VALUE])
          });
        } catch (e) {
          // do nothing, yet
        }
      } else if (typeof childType !== 'function') {
        // React
        var childName = childType ? getComponentDisplayName(childType) : 'empty';
        var extraContext = stackContext();

        if (isContextProvider(child)) {
          extraContext = new Map(extraContext);
          extraContext.set(getContextProvider(childType), _extends({}, child.nextProps || {}, child.props || {}).value);
          childName = 'ContextProvider';
        }

        renderStack.push({
          name: childName,
          type: childType,
          props: stack.instance.props,
          context: extraContext
        });

        next(
        // move types from render to the instances of hydrated tree
        mergeInject(transformFlowNode(asArray(child.props ? child.props.children : child.children)), stackChild.instance.children, stackChild.instance));
        renderStack.pop();
      } else {
        if (childType === stackChild.type) {
          next(stackChild.instance);
        } else {
          // unwrap proxy
          var _childType = getElementType$1(child);

          if (isMemoType(child)) {
            _childType = _childType.type || _childType;
          }

          if (!stackChild.type[PROXY_KEY]) {
            if (!configuration.IS_REACT_MERGE_ENABLED) {
              if (isTypeBlacklisted(stackChild.type)) {
                logger.warn('React-hot-loader: cold element got updated ', stackChild.type);
              }
            }
          }

          if (isRegisteredComponent(_childType) || isRegisteredComponent(stackChild.type)) {
            // one of elements are registered via babel plugin, and should not be handled by hot swap
            if (resolveType(_childType) === resolveType(stackChild.type)) {
              next(stackChild.instance);
            }
          } else if (areSwappable(_childType, stackChild.type)) {
            // they are both registered, or have equal code/displayname/signature

            // update proxy using internal PROXY_KEY
            updateProxyById(stackChild.type[PROXY_KEY] || getIdByType(stackChild.type), _childType);

            next(stackChild.instance);
          } else {
            logger.warn('React-hot-loader: a ' + getComponentDisplayName(_childType) + ' was found where a ' + getComponentDisplayName(stackChild) + ' was expected.\n          ' + _childType);
            stackReport();
          }
        }

        scheduleInstanceUpdate(stackChild.instance);
      }
    });
  } catch (e) {
    if (e.then) ; else {
      logger.warn('React-hot-loader: run time error during reconciliation', e);
    }
  }

  if (isReactClassInstance(instance)) {
    renderStack.pop();
  }
};

var hotReplacementRender$1 = (function (instance, stack) {
  if (configuration.disableHotRenderer) {
    return;
  }
  try {
    // disable reconciler to prevent upcoming components from proxying.
    internalConfiguration.disableProxyCreation = true;
    renderStack = [];
    hotReplacementRender(instance, stack);
  } catch (e) {
    logger.warn('React-hot-loader: reconcilation failed due to error', e);
  } finally {
    internalConfiguration.disableProxyCreation = false;
  }
});

var reconcileHotReplacement = function reconcileHotReplacement(ReactInstance) {
  var stack = getReactStack(ReactInstance);
  hotReplacementRender$1(ReactInstance, stack);
  cleanupReact();
  deepMarkUpdate(stack);
};

var renderReconciler = function renderReconciler(target, force) {
  // we are not inside parent reconcilation
  var currentGeneration = get$1();
  var componentGeneration = target[RENDERED_GENERATION];

  target[RENDERED_GENERATION] = currentGeneration;

  if (!internalConfiguration.disableProxyCreation) {
    if ((componentGeneration || force) && componentGeneration !== currentGeneration) {
      enterHotUpdate();
      reconcileHotReplacement(target);
      return true;
    }
  }
  return false;
};

function asyncReconciledRender(target) {
  renderReconciler(target, false);
}

function proxyWrapper(element) {
  // post wrap on post render
  if (!internalConfiguration.disableProxyCreation) {
    unscheduleUpdate(this);
  }

  if (!element) {
    return element;
  }
  if (Array.isArray(element)) {
    return element.map(proxyWrapper);
  }
  if (typeof element.type === 'function') {
    var proxy = getProxyByType(element.type);
    if (proxy) {
      return _extends({}, element, {
        type: proxy.get()
      });
    }
  }
  return element;
}

var ERROR_STATE = 'react_hot_loader_catched_error';
var ERROR_STATE_PROTO = 'react_hot_loader_catched_error-prototype';
var OLD_RENDER = 'react_hot_loader_original_render';

function componentDidCatch(error, errorInfo) {
  this[ERROR_STATE] = {
    location: 'boundary',
    error: error,
    errorInfo: errorInfo,
    generation: get$1()
  };
  Object.getPrototypeOf(this)[ERROR_STATE_PROTO] = this[ERROR_STATE];
  if (!configuration.errorReporter) {
    logException(error, errorInfo, this);
  }
  this.forceUpdate();
}

function componentRender() {
  var _ref = this[ERROR_STATE] || {},
      error = _ref.error,
      errorInfo = _ref.errorInfo,
      generation = _ref.generation;

  if (error && generation === get$1()) {
    return React__default.createElement(configuration.errorReporter || EmptyErrorPlaceholder, {
      error: error,
      errorInfo: errorInfo,
      component: this
    });
  }

  if (this.hotComponentUpdate) {
    this.hotComponentUpdate();
  }
  try {
    var _OLD_RENDER$render;

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return (_OLD_RENDER$render = this[OLD_RENDER].render).call.apply(_OLD_RENDER$render, [this].concat(args));
  } catch (renderError) {
    this[ERROR_STATE] = {
      location: 'render',
      error: renderError,
      generation: get$1()
    };
    if (!configuration.errorReporter) {
      logException(renderError, undefined, this);
    }
    return componentRender.call(this);
  }
}

function retryHotLoaderError() {
  delete this[ERROR_STATE];
  this.forceUpdate();
}

setComparisonHooks(function () {
  return {};
}, function (component) {
  if (!hotComparisonOpen()) {
    return;
  }
  var prototype = component.prototype;

  if (!prototype[OLD_RENDER]) {
    var renderDescriptior = Object.getOwnPropertyDescriptor(prototype, 'render');
    prototype[OLD_RENDER] = {
      descriptor: renderDescriptior ? renderDescriptior.value : undefined,
      render: prototype.render
    };
    prototype.componentDidCatch = componentDidCatch;
    prototype.retryHotLoaderError = retryHotLoaderError;

    prototype.render = componentRender;
  }
  delete prototype[ERROR_STATE];
}, function (_ref2) {
  var prototype = _ref2.prototype;

  if (prototype[OLD_RENDER]) {
    var _ref3 = prototype[ERROR_STATE_PROTO] || {},
        generation = _ref3.generation;

    if (generation === get$1()) ; else {
      delete prototype.componentDidCatch;
      delete prototype.retryHotLoaderError;

      // undo only what we did
      if (prototype.render === componentRender) {
        if (!prototype[OLD_RENDER].descriptor) {
          delete prototype.render;
        } else {
          prototype.render = prototype[OLD_RENDER].descriptor;
        }
      } else {
        console.error('React-Hot-Loader: something unexpectedly mutated Component', prototype);
      }
      delete prototype[ERROR_STATE_PROTO];
      delete prototype[OLD_RENDER];
    }
  }
});

setStandInOptions({
  componentWillRender: asyncReconciledRender,
  componentDidRender: proxyWrapper,
  componentDidUpdate: function componentDidUpdate(component) {
    component[RENDERED_GENERATION] = get$1();
    flushScheduledUpdates();
  }
});

var AppContainer = function (_React$Component) {
  inherits(AppContainer, _React$Component);

  AppContainer.getDerivedStateFromProps = function getDerivedStateFromProps(nextProps, prevState) {
    if (prevState.generation !== get$1()) {
      // Hot reload is happening.
      return {
        error: null,
        generation: get$1()
      };
    }
    return null;
  };

  function AppContainer(props) {
    classCallCheck(this, AppContainer);

    var _this = possibleConstructorReturn(this, _React$Component.call(this, props));

    if (configuration.showReactDomPatchNotification) {
      configuration.showReactDomPatchNotification = false;
      console.warn('React-Hot-Loader: react-🔥-dom patch is not detected. React 16.6+ features may not work.');
    }

    _this.state = {
      error: null,
      errorInfo: null,
      // eslint-disable-next-line react/no-unused-state
      generation: 0
    };
    return _this;
  }

  AppContainer.prototype.shouldComponentUpdate = function shouldComponentUpdate(prevProps, prevState) {
    // Don't update the component if the state had an error and still has one.
    // This allows to break an infinite loop of error -> render -> error -> render
    // https://github.com/gaearon/react-hot-loader/issues/696
    if (prevState.error && this.state.error) {
      return false;
    }

    return true;
  };

  AppContainer.prototype.componentDidCatch = function componentDidCatch(error, errorInfo) {
    logger.error(error);

    if (!hotComparisonOpen()) {
      // do not log error outside of HMR cycle

      // trigger update to kick error
      this.setState({});
      throw error;
    }
    var _props$errorReporter = this.props.errorReporter,
        errorReporter = _props$errorReporter === undefined ? configuration.errorReporter : _props$errorReporter;

    if (!errorReporter) {
      logException(error, errorInfo, this);
    }
    this.setState({
      error: error,
      errorInfo: errorInfo
    });
  };

  AppContainer.prototype.retryHotLoaderError = function retryHotLoaderError$$1() {
    var _this2 = this;

    this.setState({ error: null }, function () {
      retryHotLoaderError.call(_this2);
    });
  };

  AppContainer.prototype.render = function render() {
    var _state = this.state,
        error = _state.error,
        errorInfo = _state.errorInfo;
    var _props$errorReporter2 = this.props.errorReporter,
        ErrorReporter = _props$errorReporter2 === undefined ? configuration.errorReporter || EmptyErrorPlaceholder : _props$errorReporter2;


    if (error && this.props.errorBoundary) {
      return React__default.createElement(ErrorReporter, { error: error, errorInfo: errorInfo, component: this });
    }

    if (this.hotComponentUpdate) {
      this.hotComponentUpdate();
    } else {
      throw new Error('React-Hot-Loader: AppContainer should be patched');
    }

    return React__default.Children.only(this.props.children);
  };

  return AppContainer;
}(React__default.Component);

AppContainer.reactHotLoadable = false;


AppContainer.propTypes = {
  children: function children(props) {
    if (React__default.Children.count(props.children) !== 1) {
      return new Error('Invalid prop "children" supplied to AppContainer. ' + 'Expected a single React element with your app’s root component, e.g. <App />.');
    }

    return undefined;
  },

  errorReporter: PropTypes.oneOfType([PropTypes.node, PropTypes.func]),
  errorBoundary: PropTypes.bool
};

AppContainer.defaultProps = {
  errorBoundary: true
};

//  trying first react-lifecycles-compat.polyfill, then trying react-lifecycles-compat, which could be .default
var realPolyfill = defaultPolyfill.polyfill || defaultPolyfill__default;
realPolyfill(AppContainer);

var lazyConstructor = '_ctor';

var patchLazyConstructor = function patchLazyConstructor(target) {
  if (!configuration.trackTailUpdates && !target[lazyConstructor].isPatchedByReactHotLoader) {
    var ctor = target[lazyConstructor];
    target[lazyConstructor] = function () {
      return ctor().then(function (m) {
        var C = resolveType(m.default);
        // chunks has been updated - new hot loader process is taking a place
        enterHotUpdate();
        if (!React__default.forwardRef) {
          return {
            default: function _default(props) {
              return React__default.createElement(
                AppContainer,
                null,
                React__default.createElement(C, props)
              );
            }
          };
        }
        return {
          default: React__default.forwardRef(function (props, ref) {
            return React__default.createElement(
              AppContainer,
              null,
              React__default.createElement(C, _extends({}, props, { ref: ref }))
            );
          })
        };
      });
    };
    target[lazyConstructor].isPatchedByReactHotLoader = true;
  }
};

var updateLazy = function updateLazy(target, type) {
  var ctor = type[lazyConstructor];
  if (target[lazyConstructor] !== type[lazyConstructor]) {
    // just execute `import` and RHL.register will do the job
    ctor();
  }
  patchLazyConstructor(target);
  patchLazyConstructor(type);
};

var updateMemo = function updateMemo(target, _ref) {
  var type = _ref.type;

  target.type = resolveType(type);
};

var updateForward = function updateForward(target, _ref2) {
  var render = _ref2.render;

  target.render = render;
};

var updateContext = function updateContext() {
  // nil
};

var getInnerComponentType = function getInnerComponentType(component) {
  var unwrapper = component[UNWRAP_PROXY];
  return unwrapper ? unwrapper() : component;
};

function haveEqualSignatures(prevType, nextType) {
  try {
    var prevSignature = getSignature(prevType);
    var nextSignature = getSignature(nextType);

    if (prevSignature === undefined && nextSignature === undefined) {
      return true;
    }
    if (prevSignature === undefined || nextSignature === undefined) {
      return false;
    }
    if (prevSignature.key !== nextSignature.key) {
      return false;
    }

    // TODO: we might need to calculate previous signature earlier in practice,
    // such as during the first time a component is resolved. We'll revisit this.
    var prevCustomHooks = prevSignature.getCustomHooks();
    var nextCustomHooks = nextSignature.getCustomHooks();
    if (prevCustomHooks.length !== nextCustomHooks.length) {
      return false;
    }

    for (var i = 0; i < nextCustomHooks.length; i++) {
      if (!haveEqualSignatures(prevCustomHooks[i], nextCustomHooks[i])) {
        return false;
      }
    }
  } catch (e) {
    logger.error('React-Hot-Loader: error occurred while comparing hook signature', e);
    return false;
  }

  return true;
}

var areSignaturesCompatible = function areSignaturesCompatible(a, b) {
  // compare signatures of two components
  // non-equal component have to remount and there is two options to do it
  // - fail the comparison, remounting all tree below
  // - fulfill it, but set `_debugNeedsRemount` on a fiber to drop only local state
  // the second way is not published yet, so going with the first one
  if (!haveEqualSignatures(a, b)) {
    logger.warn('⚛️🔥🎣 Hook order change detected: component', a, 'has been remounted');
    return false;
  }
  return true;
};

var compareRegistered = function compareRegistered(a, b) {
  return getIdByType(a) === getIdByType(b) && getProxyByType(a) === getProxyByType(b) && areSignaturesCompatible(a, b);
};

var areDeepSwappable = function areDeepSwappable(oldType, newType) {
  var type = { type: oldType };

  if (typeof oldType === 'function') {
    return areSwappable(oldType, newType);
  }

  if (isForwardType(type)) {
    return areDeepSwappable(oldType.render, newType.render);
  }

  if (isMemoType(type)) {
    return areDeepSwappable(oldType.type, newType.type);
  }

  // that's not safe
  // if (isLazyType(type)) {
  //   return areDeepSwappable(oldType._ctor, newType._ctor)
  // }

  return false;
};

var compareComponents = function compareComponents(oldType, newType, setNewType, baseType) {
  var defaultResult = oldType === newType;

  if (oldType && !newType || !oldType && newType || (typeof oldType === 'undefined' ? 'undefined' : _typeof(oldType)) !== (typeof newType === 'undefined' ? 'undefined' : _typeof(newType)) || getElementType(oldType) !== getElementType(newType) || 0) {
    return defaultResult;
  }

  if (getIdByType(newType) || getIdByType(oldType)) {
    if (!compareRegistered(oldType, newType)) {
      return false;
    }
    defaultResult = true;
  }

  if (isForwardType({ type: oldType }) && isForwardType({ type: newType })) {
    if (!compareRegistered(oldType.render, newType.render)) {
      return false;
    }
    if (oldType.render === newType.render || areDeepSwappable(oldType, newType)) {
      setNewType(newType);
      return true;
    }
    return defaultResult;
  }

  if (isMemoType({ type: oldType }) && isMemoType({ type: newType })) {
    if (!compareRegistered(oldType.type, newType.type)) {
      return false;
    }
    if (oldType.type === newType.type || areDeepSwappable(oldType, newType)) {
      if (baseType) {
        // memo form different fibers, why?
        if (baseType.$$typeof === newType.$$typeof) {
          setNewType(newType);
        } else {
          setNewType(newType.type);
        }
      } else {
        logger.warn('Please update hot-loader/react-dom');
        if (isReactClass(newType.type)) {
          setNewType(newType);
        } else {
          setNewType(newType.type);
        }
      }

      return true;
    }
    return defaultResult;
  }

  if (isLazyType({ type: oldType })) {
    updateLazy(oldType, newType);
    // no need to update
    // setNewType(newType);
    return defaultResult;
  }

  if (isContextType({ type: oldType })) {
    // update provider
    setNewType(newType);
    return defaultResult;
  }

  if (typeof newType === 'function' && (defaultResult || newType !== oldType && areSignaturesCompatible(newType, oldType) && areSwappable(newType, oldType))) {
    var unwrapFactory = newType[UNWRAP_PROXY];
    var oldProxy = unwrapFactory && getProxyByType(unwrapFactory());
    if (oldProxy) {
      oldProxy.dereference();
      updateProxyById(oldType[PROXY_KEY] || getIdByType(oldType), getInnerComponentType(newType));
    } else {
      setNewType(newType);
    }
    return true;
  }

  return defaultResult;
};

var knownPairs = new WeakMap();
var emptyMap$1 = new WeakMap();

var getKnownPair = function getKnownPair(oldType, newType) {
  var pair = knownPairs.get(oldType) || emptyMap$1;
  return pair.get(newType);
};

var hotComponentCompare = function hotComponentCompare(oldType, preNewType, setNewType, baseType) {
  var hotActive = hotComparisonOpen();
  var newType = configuration.integratedResolver ? resolveType(preNewType) : preNewType;

  // TODO: find out the root cause
  // we could not use "fast result" here - go a full part to update a fiber.
  // const knownType = getKnownPair(oldType, newType);
  // if (knownType !== undefined) {
  //   return knownType;
  // }

  var result = oldType === newType;

  if (hotActive) {
    // pre fail components which could not be merged
    if (!isReloadableComponent(oldType) || !isReloadableComponent(newType) || isColdType(oldType) || isColdType(oldType) || !oldType || !newType || 0) {
      return result;
    }

    result = compareComponents(oldType, newType, setNewType, baseType);
    var pair = knownPairs.get(oldType) || new WeakMap();
    pair.set(newType, result);
    knownPairs.set(oldType, pair);
    return result;
  }

  // result - true if components are equal, or were "equal" at any point in the past
  return result || getKnownPair(oldType, newType) || false;
};

/* eslint-disable no-use-before-define */

var forceSimpleSFC = { proxy: { pureSFC: true } };

var hookWrapper = function hookWrapper(hook) {
  var wrappedHook = function wrappedHook(cb, deps) {
    if (configuration.reloadHooks && deps) {
      var inputs = [].concat(deps);

      // reload hooks which have changed string representation
      if (configuration.reloadHooksOnBodyChange) {
        inputs.push(String(cb));
      }

      if (
      // reload hooks with dependencies
      deps.length > 0 ||
      // reload all hooks of option is set
      configuration.reloadLifeCycleHooks && deps.length === 0) {
        inputs.push(getHotGeneration());
      }

      return hook(cb, inputs);
    }
    return hook(cb, deps);
  };
  wrappedHook.isPatchedByReactHotLoader = true;
  return wrappedHook;
};

var noDeps = function noDeps() {
  return [];
};

var reactHotLoader = {
  signature: function signature(type, key) {
    var getCustomHooks = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : noDeps;

    addSignature(type, { key: key, getCustomHooks: getCustomHooks });
    return type;
  },
  register: function register(type, uniqueLocalName, fileName) {
    var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};

    var id = fileName + '#' + uniqueLocalName;

    if (isCompositeComponent(type) && typeof uniqueLocalName === 'string' && uniqueLocalName && typeof fileName === 'string' && fileName) {
      var proxy = getProxyById(id);

      if (proxy && proxy.getCurrent() !== type) {
        if (!configuration.IS_REACT_MERGE_ENABLED) {
          if (isTypeBlacklisted(type) || isTypeBlacklisted(proxy.getCurrent())) {
            logger.error('React-hot-loader: Cold component', uniqueLocalName, 'at', fileName, 'has been updated');
          }
        }
      }

      if (configuration.onComponentRegister) {
        configuration.onComponentRegister(type, uniqueLocalName, fileName);
      }
      if (configuration.onComponentCreate) {
        configuration.onComponentCreate(type, getComponentDisplayName(type));
      }

      registerComponent(updateProxyById(id, type, options).get(), 2);
      registerComponent(type);
      increment();
    }
    if (isContextType({ type: type })) {
      // possible options - Context, Consumer, Provider.
      ['Provider', 'Consumer'].forEach(function (prop) {
        var descriptor = Object.getOwnPropertyDescriptor(type, prop);
        if (descriptor && descriptor.value) {
          updateFunctionProxyById(id + ':' + prop, descriptor.value, updateContext);
        }
      });
      updateFunctionProxyById(id, type, updateContext);
      increment();
    }
    if (isLazyType({ type: type })) {
      updateFunctionProxyById(id, type, updateLazy);
      increment();
    }
    if (isForwardType({ type: type })) {
      reactHotLoader.register(type.render, uniqueLocalName + ':render', fileName, forceSimpleSFC);
      updateFunctionProxyById(id, type, updateForward);
      increment();
    }
    if (isMemoType({ type: type })) {
      reactHotLoader.register(type.type, uniqueLocalName + ':memo', fileName, forceSimpleSFC);
      updateFunctionProxyById(id, type, updateMemo);
      increment();
    }
  },
  reset: function reset() {
    resetProxies();
  },
  preact: function preact(instance) {
    preactAdapter(instance, resolveType);
  },
  resolveType: function resolveType$$1(type) {
    return resolveType(type);
  },
  patch: function patch(React$$1, ReactDOM$$1) {
    var typeResolver = resolveType;
    /* eslint-disable no-console */
    if (ReactDOM$$1 && !ReactDOM$$1.render) {
      logger.error('React-Hot-Loader: broken state detected, please import React-Hot-Loader before react-dom, see https://github.com/gaearon/react-hot-loader/issues/1315');
    }
    if (ReactDOM$$1 && ReactDOM$$1.setHotElementComparator) {
      ReactDOM$$1.setHotElementComparator(hotComponentCompare);
      configuration.disableHotRenderer = configuration.disableHotRendererWhenInjected;

      configuration.ignoreSFC = configuration.ignoreSFCWhenInjected;

      configuration.IS_REACT_MERGE_ENABLED = true;
      configuration.showReactDomPatchNotification = false;
      configuration.integratedComparator = true;

      if (ReactDOM$$1.setHotTypeResolver) {
        configuration.integratedResolver = true;
        typeResolver = resolveSimpleType;
        ReactDOM$$1.setHotTypeResolver(resolveType);
      }
    }

    // PATCH REACT METHODS

    /* eslint-enable */
    if (!React$$1.createElement.isPatchedByReactHotLoader) {
      var originalCreateElement = React$$1.createElement;
      // Trick React into rendering a proxy so that
      // its state is preserved when the class changes.
      // This will update the proxy if it's for a known type.
      React$$1.createElement = function (type) {
        for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
          args[_key - 1] = arguments[_key];
        }

        return originalCreateElement.apply(undefined, [typeResolver(type)].concat(args));
      };
      React$$1.createElement.isPatchedByReactHotLoader = true;
    }

    if (!React$$1.cloneElement.isPatchedByReactHotLoader) {
      var originalCloneElement = React$$1.cloneElement;

      React$$1.cloneElement = function (element) {
        for (var _len2 = arguments.length, args = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
          args[_key2 - 1] = arguments[_key2];
        }

        var newType = element.type && typeResolver(element.type);
        if (newType && newType !== element.type) {
          return originalCloneElement.apply(undefined, [_extends({}, element, {
            type: newType
          })].concat(args));
        }
        return originalCloneElement.apply(undefined, [element].concat(args));
      };

      React$$1.cloneElement.isPatchedByReactHotLoader = true;
    }

    if (!React$$1.createFactory.isPatchedByReactHotLoader) {
      // Patch React.createFactory to use patched createElement
      // because the original implementation uses the internal,
      // unpatched ReactElement.createElement
      React$$1.createFactory = function (type) {
        var factory = React$$1.createElement.bind(null, type);
        factory.type = type;
        return factory;
      };
      React$$1.createFactory.isPatchedByReactHotLoader = true;
    }

    if (!React$$1.Children.only.isPatchedByReactHotLoader) {
      var originalChildrenOnly = React$$1.Children.only;
      // Use the same trick as React.createElement
      React$$1.Children.only = function (children) {
        return originalChildrenOnly(_extends({}, children, {
          type: typeResolver(children.type)
        }));
      };
      React$$1.Children.only.isPatchedByReactHotLoader = true;
    }

    // PATCH REACT HOOKS

    if (React$$1.useEffect && !React$$1.useEffect.isPatchedByReactHotLoader) {
      React$$1.useEffect = hookWrapper(React$$1.useEffect);
      React$$1.useLayoutEffect = hookWrapper(React$$1.useLayoutEffect);
      React$$1.useCallback = hookWrapper(React$$1.useCallback);
      React$$1.useMemo = hookWrapper(React$$1.useMemo);

      // transform context for useContext
      var useContext = React$$1.useContext;

      React$$1.useContext = function (context) {
        for (var _len3 = arguments.length, args = Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
          args[_key3 - 1] = arguments[_key3];
        }

        return useContext.apply(undefined, [typeResolver(context)].concat(args));
      };
    }

    // reactHotLoader.reset()
  }
};

var openedModules = {};
var lastModuleOpened = '';
var getLastModuleOpened = function getLastModuleOpened() {
  return lastModuleOpened;
};

var hotModules = {};

var createHotModule = function createHotModule() {
  return { instances: [], updateTimeout: 0 };
};

var hotModule = function hotModule(moduleId) {
  if (!hotModules[moduleId]) {
    hotModules[moduleId] = createHotModule();
  }
  return hotModules[moduleId];
};

var isOpened = function isOpened(sourceModule) {
  return sourceModule && !!openedModules[sourceModule.id];
};

var enter = function enter(sourceModule) {
  if (sourceModule && sourceModule.id) {
    lastModuleOpened = sourceModule.id;
    openedModules[sourceModule.id] = true;
  } else {
    logger.warn('React-hot-loader: no `module` variable found. Did you shadow a system variable?');
  }
};

var leave = function leave(sourceModule) {
  if (sourceModule && sourceModule.id) {
    delete openedModules[sourceModule.id];
  }
};

var createQueue = function createQueue() {
  var runner = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function (a) {
    return a();
  };

  var promise = void 0;
  var queue = [];

  var runAll = function runAll() {
    var oldQueue = queue;
    oldQueue.forEach(function (cb) {
      return cb();
    });
    queue = [];
  };

  var add = function add(cb) {
    if (queue.length === 0) {
      promise = Promise.resolve().then(function () {
        return runner(runAll);
      });
    }
    queue.push(cb);

    return promise;
  };

  return add;
};

/* eslint-disable camelcase, no-undef */
var requireIndirect = typeof __webpack_require__ !== 'undefined' ? __webpack_require__ : require;
/* eslint-enable */

var chargeFailbackTimer = function chargeFailbackTimer(id) {
  return setTimeout(function () {
    var error = 'hot update failed for module "' + id + '". Last file processed: "' + getLastModuleOpened() + '".';
    logger.error(error);
    logException({
      toString: function toString() {
        return error;
      }
    });
    // 100 ms more "code" tolerant that 0, and would catch error in any case
  }, 100);
};

var clearFailbackTimer = function clearFailbackTimer(timerId) {
  return clearTimeout(timerId);
};

var createHoc = function createHoc(SourceComponent, TargetComponent) {
  hoistNonReactStatic(TargetComponent, SourceComponent);
  TargetComponent.displayName = 'HotExported' + getComponentDisplayName(SourceComponent);
  return TargetComponent;
};

var runInRequireQueue = createQueue();
var runInRenderQueue = createQueue(function (cb) {
  if (ReactDOM.unstable_batchedUpdates) {
    ReactDOM.unstable_batchedUpdates(cb);
  } else {
    cb();
  }
});

var makeHotExport = function makeHotExport(sourceModule, moduleId) {
  var updateInstances = function updateInstances(possibleError) {
    if (possibleError && possibleError instanceof Error) {
      console.error(possibleError);
      return;
    }
    var module = hotModule(moduleId);

    var deepUpdate = function deepUpdate() {
      // force flush all updates
      runInRenderQueue(function () {
        enterHotUpdate();
        var gen = getHotGeneration();
        module.instances.forEach(function (inst) {
          return inst.forceUpdate();
        });

        if (configuration.trackTailUpdates) {
          var runLimit = 0;
          var checkTailUpdates = function checkTailUpdates() {
            setTimeout(function () {
              if (getHotGeneration() !== gen) {
                // we know that some components were updated, but not tracking which ones
                // even if their updates might be incorporated automatically (like lazy)
                // we dont know which one should be tracked, and which updates are important
                logger.warn('React-Hot-Loader: some components were updated out-of-bound. Updating your app to reconcile the changes.');
                deepUpdate();
              } else if (++runLimit < 5) {
                checkTailUpdates();
              }
            }, 16);
          };

          checkTailUpdates();
        }
      });
    };

    // require all modules
    runInRequireQueue(function () {
      try {
        // webpack will require everything by this time
        // but let's double check...
        requireIndirect(moduleId);
      } catch (e) {
        console.error('React-Hot-Loader: error detected while loading', moduleId);
        console.error(e);
      }
    }).then(deepUpdate);
  };

  if (sourceModule.hot) {
    // Mark as self-accepted for Webpack (callback is an Error Handler)
    // Update instances for Parcel (callback is an Accept Handler)
    sourceModule.hot.accept(updateInstances);

    // Webpack way
    if (sourceModule.hot.addStatusHandler) {
      if (sourceModule.hot.status() === 'idle') {
        sourceModule.hot.addStatusHandler(function (status) {
          if (status === 'apply') {
            clearExceptions();
            updateInstances();
          }
        });
      }
    }
  } else {
    logger.warn('React-hot-loader: Hot Module Replacement is not enabled');
  }
};

var hot = function hot(sourceModule) {
  if (!sourceModule) {
    // this is fatal
    throw new Error('React-hot-loader: `hot` was called without any argument provided');
  }
  var moduleId = sourceModule.id || sourceModule.i || sourceModule.filename;
  if (!moduleId) {
    console.error('`module` provided', sourceModule);
    throw new Error('React-hot-loader: `hot` could not find the `name` of the the `module` you have provided');
  }
  var module = hotModule(moduleId);
  makeHotExport(sourceModule, moduleId);

  clearExceptions();
  var failbackTimer = chargeFailbackTimer(moduleId);
  var firstHotRegistered = false;

  // TODO: Ensure that all exports from this file are react components.

  return function (WrappedComponent, props) {
    clearFailbackTimer(failbackTimer);
    // register proxy for wrapped component
    // only one hot per file would use this registration
    if (!firstHotRegistered) {
      firstHotRegistered = true;
      reactHotLoader.register(WrappedComponent, getComponentDisplayName(WrappedComponent), 'RHL' + moduleId);
    }

    return createHoc(WrappedComponent, function (_Component) {
      inherits(ExportedComponent, _Component);

      function ExportedComponent() {
        classCallCheck(this, ExportedComponent);
        return possibleConstructorReturn(this, _Component.apply(this, arguments));
      }

      ExportedComponent.prototype.componentDidMount = function componentDidMount() {
        module.instances.push(this);
      };

      ExportedComponent.prototype.componentWillUnmount = function componentWillUnmount() {
        var _this2 = this;

        if (isOpened(sourceModule)) {
          var componentName = getComponentDisplayName(WrappedComponent);
          logger.error('React-hot-loader: Detected AppContainer unmount on module \'' + moduleId + '\' update.\n' + ('Did you use "hot(' + componentName + ')" and "ReactDOM.render()" in the same file?\n') + ('"hot(' + componentName + ')" shall only be used as export.\n') + 'Please refer to "Getting Started" (https://github.com/gaearon/react-hot-loader/).');
        }
        module.instances = module.instances.filter(function (a) {
          return a !== _this2;
        });
      };

      ExportedComponent.prototype.render = function render() {
        return React__default.createElement(
          AppContainer,
          props,
          React__default.createElement(WrappedComponent, this.props)
        );
      };

      return ExportedComponent;
    }(React.Component));
  };
};

var getProxyOrType = function getProxyOrType(type) {
  var proxy = getProxyByType(type);
  return proxy ? proxy.get() : type;
};

var areComponentsEqual = function areComponentsEqual(a, b) {
  return getProxyOrType(a) === getProxyOrType(b);
};

var compareOrSwap = function compareOrSwap(oldType, newType) {
  return hotComponentCompare(oldType, newType);
};

var cold = function cold(type) {
  blacklistByType(type);
  return type;
};

var configureComponent = function configureComponent(component, options) {
  return setComponentOptions(component, options);
};

var setConfig = function setConfig(config) {
  return setConfiguration(config);
};

reactHotLoader.patch(React__default, ReactDOM);

exports.default = reactHotLoader;
exports.AppContainer = AppContainer;
exports.hot = hot;
exports.enterModule = enter;
exports.leaveModule = leave;
exports.areComponentsEqual = areComponentsEqual;
exports.compareOrSwap = compareOrSwap;
exports.cold = cold;
exports.configureComponent = configureComponent;
exports.setConfig = setConfig;