(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(factory((global.Redux = global.Redux || {})));
}(this, (function (exports) { 'use strict';
/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
/** Used as a reference to the global object. */
var root = freeGlobal || freeSelf || Function('return this')();
/** Built-in value references. */
var Symbol = root.Symbol;
/** Used for built-in method references. */
var objectProto$1 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$1.hasOwnProperty;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString = objectProto$1.toString;
/** Built-in value references. */
var symToStringTag$1 = Symbol ? Symbol.toStringTag : undefined;
/**
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the raw `toStringTag`.
*/
function getRawTag(value) {
var isOwn = hasOwnProperty$1.call(value, symToStringTag$1),
tag = value[symToStringTag$1];
try {
value[symToStringTag$1] = undefined;
var unmasked = true;
} catch (e) {}
var result = nativeObjectToString.call(value);
if (unmasked) {
if (isOwn) {
value[symToStringTag$1] = tag;
} else {
delete value[symToStringTag$1];
}
}
return result;
}
/** Used for built-in method references. */
var objectProto$2 = Object.prototype;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString$1 = objectProto$2.toString;
/**
* Converts `value` to a string using `Object.prototype.toString`.
*
* @private
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
*/
function objectToString(value) {
return nativeObjectToString$1.call(value);
}
/** `Object#toString` result references. */
var nullTag = '[object Null]';
var undefinedTag = '[object Undefined]';
/** Built-in value references. */
var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
return (symToStringTag && symToStringTag in Object(value))
? getRawTag(value)
: objectToString(value);
}
/**
* Creates a unary function that invokes `func` with its argument transformed.
*
* @private
* @param {Function} func The function to wrap.
* @param {Function} transform The argument transform.
* @returns {Function} Returns the new function.
*/
function overArg(func, transform) {
return function(arg) {
return func(transform(arg));
};
}
/** Built-in value references. */
var getPrototype = overArg(Object.getPrototypeOf, Object);
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return value != null && typeof value == 'object';
}
/** `Object#toString` result references. */
var objectTag = '[object Object]';
/** Used for built-in method references. */
var funcProto = Function.prototype;
var objectProto = Object.prototype;
/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/** Used to infer the `Object` constructor. */
var objectCtorString = funcToString.call(Object);
/**
* Checks if `value` is a plain object, that is, an object created by the
* `Object` constructor or one with a `[[Prototype]]` of `null`.
*
* @static
* @memberOf _
* @since 0.8.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
* @example
*
* function Foo() {
* this.a = 1;
* }
*
* _.isPlainObject(new Foo);
* // => false
*
* _.isPlainObject([1, 2, 3]);
* // => false
*
* _.isPlainObject({ 'x': 0, 'y': 0 });
* // => true
*
* _.isPlainObject(Object.create(null));
* // => true
*/
function isPlainObject(value) {
if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
return false;
}
var proto = getPrototype(value);
if (proto === null) {
return true;
}
var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
return typeof Ctor == 'function' && Ctor instanceof Ctor &&
funcToString.call(Ctor) == objectCtorString;
}
function symbolObservablePonyfill(root) {
var result;
var Symbol = root.Symbol;
if (typeof Symbol === 'function') {
if (Symbol.observable) {
result = Symbol.observable;
} else {
result = Symbol('observable');
Symbol.observable = result;
}
} else {
result = '@@observable';
}
return result;
}
/* global window */
var root$2;
if (typeof self !== 'undefined') {
root$2 = self;
} else if (typeof window !== 'undefined') {
root$2 = window;
} else if (typeof global !== 'undefined') {
root$2 = global;
} else if (typeof module !== 'undefined') {
root$2 = module;
} else {
root$2 = Function('return this')();
}
var result = symbolObservablePonyfill(root$2);
/**
* These are private action types reserved by Redux.
* For any unknown actions, you must return the current state.
* If the current state is undefined, you must return the initial state.
* Do not reference these action types directly in your code.
*/
var ActionTypes = {
INIT: '@@redux/INIT'
/**
* Creates a Redux store that holds the state tree.
* The only way to change the data in the store is to call `dispatch()` on it.
*
* There should only be a single store in your app. To specify how different
* parts of the state tree respond to actions, you may combine several reducers
* into a single reducer function by using `combineReducers`.
*
* @param {Function} reducer A function that returns the next state tree, given
* the current state tree and the action to handle.
*
* @param {any} [preloadedState] The initial state. You may optionally specify it
* to hydrate the state from the server in universal apps, or to restore a
* previously serialized user session.
* If you use `combineReducers` to produce the root reducer function, this must be
* an object with the same shape as `combineReducers` keys.
*
* @param {Function} [enhancer] The store enhancer. You may optionally specify it
* to enhance the store with third-party capabilities such as middleware,
* time travel, persistence, etc. The only store enhancer that ships with Redux
* is `applyMiddleware()`.
*
* @returns {Store} A Redux store that lets you read the state, dispatch actions
* and subscribe to changes.
*/
};function createStore(reducer, preloadedState, enhancer) {
var _ref2;
if (typeof preloadedState === 'function' && typeof enhancer === 'undefined') {
enhancer = preloadedState;
preloadedState = undefined;
}
if (typeof enhancer !== 'undefined') {
if (typeof enhancer !== 'function') {
throw new Error('Expected the enhancer to be a function.');
}
return enhancer(createStore)(reducer, preloadedState);
}
if (typeof reducer !== 'function') {
throw new Error('Expected the reducer to be a function.');
}
var currentReducer = reducer;
var currentState = preloadedState;
var currentListeners = [];
var nextListeners = currentListeners;
var isDispatching = false;
function ensureCanMutateNextListeners() {
if (nextListeners === currentListeners) {
nextListeners = currentListeners.slice();
}
}
/**
* Reads the state tree managed by the store.
*
* @returns {any} The current state tree of your application.
*/
function getState() {
return currentState;
}
/**
* Adds a change listener. It will be called any time an action is dispatched,
* and some part of the state tree may potentially have changed. You may then
* call `getState()` to read the current state tree inside the callback.
*
* You may call `dispatch()` from a change listener, with the following
* caveats:
*
* 1. The subscriptions are snapshotted just before every `dispatch()` call.
* If you subscribe or unsubscribe while the listeners are being invoked, this
* will not have any effect on the `dispatch()` that is currently in progress.
* However, the next `dispatch()` call, whether nested or not, will use a more
* recent snapshot of the subscription list.
*
* 2. The listener should not expect to see all state changes, as the state
* might have been updated multiple times during a nested `dispatch()` before
* the listener is called. It is, however, guaranteed that all subscribers
* registered before the `dispatch()` started will be called with the latest
* state by the time it exits.
*
* @param {Function} listener A callback to be invoked on every dispatch.
* @returns {Function} A function to remove this change listener.
*/
function subscribe(listener) {
if (typeof listener !== 'function') {
throw new Error('Expected listener to be a function.');
}
var isSubscribed = true;
ensureCanMutateNextListeners();
nextListeners.push(listener);
return function unsubscribe() {
if (!isSubscribed) {
return;
}
isSubscribed = false;
ensureCanMutateNextListeners();
var index = nextListeners.indexOf(listener);
nextListeners.splice(index, 1);
};
}
/**
* Dispatches an action. It is the only way to trigger a state change.
*
* The `reducer` function, used to create the store, will be called with the
* current state tree and the given `action`. Its return value will
* be considered the **next** state of the tree, and the change listeners
* will be notified.
*
* The base implementation only supports plain object actions. If you want to
* dispatch a Promise, an Observable, a thunk, or something else, you need to
* wrap your store creating function into the corresponding middleware. For
* example, see the documentation for the `redux-thunk` package. Even the
* middleware will eventually dispatch plain object actions using this method.
*
* @param {Object} action A plain object representing “what changed”. It is
* a good idea to keep actions serializable so you can record and replay user
* sessions, or use the time travelling `redux-devtools`. An action must have
* a `type` property which may not be `undefined`. It is a good idea to use
* string constants for action types.
*
* @returns {Object} For convenience, the same action object you dispatched.
*
* Note that, if you use a custom middleware, it may wrap `dispatch()` to
* return something else (for example, a Promise you can await).
*/
function dispatch(action) {
if (!isPlainObject(action)) {
throw new Error('Actions must be plain objects. ' + 'Use custom middleware for async actions.');
}
if (typeof action.type === 'undefined') {
throw new Error('Actions may not have an undefined "type" property. ' + 'Have you misspelled a constant?');
}
if (isDispatching) {
throw new Error('Reducers may not dispatch actions.');
}
try {
isDispatching = true;
currentState = currentReducer(currentState, action);
} finally {
isDispatching = false;
}
var listeners = currentListeners = nextListeners;
for (var i = 0; i < listeners.length; i++) {
var listener = listeners[i];
listener();
}
return action;
}
/**
* Replaces the reducer currently used by the store to calculate the state.
*
* You might need this if your app implements code splitting and you want to
* load some of the reducers dynamically. You might also need this if you
* implement a hot reloading mechanism for Redux.
*
* @param {Function} nextReducer The reducer for the store to use instead.
* @returns {void}
*/
function replaceReducer(nextReducer) {
if (typeof nextReducer !== 'function') {
throw new Error('Expected the nextReducer to be a function.');
}
currentReducer = nextReducer;
dispatch({ type: ActionTypes.INIT });
}
/**
* Interoperability point for observable/reactive libraries.
* @returns {observable} A minimal observable of state changes.
* For more information, see the observable proposal:
* https://github.com/tc39/proposal-observable
*/
function observable() {
var _ref;
var outerSubscribe = subscribe;
return _ref = {
/**
* The minimal observable subscription method.
* @param {Object} observer Any object that can be used as an observer.
* The observer object should have a `next` method.
* @returns {subscription} An object with an `unsubscribe` method that can
* be used to unsubscribe the observable from the store, and prevent further
* emission of values from the observable.
*/
subscribe: function subscribe(observer) {
if (typeof observer !== 'object') {
throw new TypeError('Expected the observer to be an object.');
}
function observeState() {
if (observer.next) {
observer.next(getState());
}
}
observeState();
var unsubscribe = outerSubscribe(observeState);
return { unsubscribe: unsubscribe };
}
}, _ref[result] = function () {
return this;
}, _ref;
}
// When a store is created, an "INIT" action is dispatched so that every
// reducer returns their initial state. This effectively populates
// the initial state tree.
dispatch({ type: ActionTypes.INIT });
return _ref2 = {
dispatch: dispatch,
subscribe: subscribe,
getState: getState,
replaceReducer: replaceReducer
}, _ref2[result] = observable, _ref2;
}
/**
* Prints a warning in the console if it exists.
*
* @param {String} message The warning message.
* @returns {void}
*/
function warning(message) {
/* eslint-disable no-console */
if (typeof console !== 'undefined' && typeof console.error === 'function') {
console.error(message);
}
/* eslint-enable no-console */
try {
// This error was thrown as a convenience so that if you enable
// "break on all exceptions" in your console,
// it would pause the execution at this line.
throw new Error(message);
/* eslint-disable no-empty */
} catch (e) {}
/* eslint-enable no-empty */
}
function getUndefinedStateErrorMessage(key, action) {
var actionType = action && action.type;
var actionName = actionType && '"' + actionType.toString() + '"' || 'an action';
return 'Given action ' + actionName + ', reducer "' + key + '" returned undefined. ' + 'To ignore an action, you must explicitly return the previous state. ' + 'If you want this reducer to hold no value, you can return null instead of undefined.';
}
function getUnexpectedStateShapeWarningMessage(inputState, reducers, action, unexpectedKeyCache) {
var reducerKeys = Object.keys(reducers);
var argumentName = action && action.type === ActionTypes.INIT ? 'preloadedState argument passed to createStore' : 'previous state received by the reducer';
if (reducerKeys.length === 0) {
return 'Store does not have a valid reducer. Make sure the argument passed ' + 'to combineReducers is an object whose values are reducers.';
}
if (!isPlainObject(inputState)) {
return 'The ' + argumentName + ' has unexpected type of "' + {}.toString.call(inputState).match(/\s([a-z|A-Z]+)/)[1] + '". Expected argument to be an object with the following ' + ('keys: "' + reducerKeys.join('", "') + '"');
}
var unexpectedKeys = Object.keys(inputState).filter(function (key) {
return !reducers.hasOwnProperty(key) && !unexpectedKeyCache[key];
});
unexpectedKeys.forEach(function (key) {
unexpectedKeyCache[key] = true;
});
if (unexpectedKeys.length > 0) {
return 'Unexpected ' + (unexpectedKeys.length > 1 ? 'keys' : 'key') + ' ' + ('"' + unexpectedKeys.join('", "') + '" found in ' + argumentName + '. ') + 'Expected to find one of the known reducer keys instead: ' + ('"' + reducerKeys.join('", "') + '". Unexpected keys will be ignored.');
}
}
function assertReducerShape(reducers) {
Object.keys(reducers).forEach(function (key) {
var reducer = reducers[key];
var initialState = reducer(undefined, { type: ActionTypes.INIT });
if (typeof initialState === 'undefined') {
throw new Error('Reducer "' + key + '" returned undefined during initialization. ' + 'If the state passed to the reducer is undefined, you must ' + 'explicitly return the initial state. The initial state may ' + 'not be undefined. If you don\'t want to set a value for this reducer, ' + 'you can use null instead of undefined.');
}
var type = '@@redux/PROBE_UNKNOWN_ACTION_' + Math.random().toString(36).substring(7).split('').join('.');
if (typeof reducer(undefined, { type: type }) === 'undefined') {
throw new Error('Reducer "' + key + '" returned undefined when probed with a random type. ' + ('Don\'t try to handle ' + ActionTypes.INIT + ' or other actions in "redux/*" ') + 'namespace. They are considered private. Instead, you must return the ' + 'current state for any unknown actions, unless it is undefined, ' + 'in which case you must return the initial state, regardless of the ' + 'action type. The initial state may not be undefined, but can be null.');
}
});
}
/**
* Turns an object whose values are different reducer functions, into a single
* reducer function. It will call every child reducer, and gather their results
* into a single state object, whose keys correspond to the keys of the passed
* reducer functions.
*
* @param {Object} reducers An object whose values correspond to different
* reducer functions that need to be combined into one. One handy way to obtain
* it is to use ES6 `import * as reducers` syntax. The reducers may never return
* undefined for any action. Instead, they should return their initial state
* if the state passed to them was undefined, and the current state for any
* unrecognized action.
*
* @returns {Function} A reducer function that invokes every reducer inside the
* passed object, and builds a state object with the same shape.
*/
function combineReducers(reducers) {
var reducerKeys = Object.keys(reducers);
var finalReducers = {};
for (var i = 0; i < reducerKeys.length; i++) {
var key = reducerKeys[i];
{
if (typeof reducers[key] === 'undefined') {
warning('No reducer provided for key "' + key + '"');
}
}
if (typeof reducers[key] === 'function') {
finalReducers[key] = reducers[key];
}
}
var finalReducerKeys = Object.keys(finalReducers);
var unexpectedKeyCache = void 0;
{
unexpectedKeyCache = {};
}
var shapeAssertionError = void 0;
try {
assertReducerShape(finalReducers);
} catch (e) {
shapeAssertionError = e;
}
return function combination() {
var state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
var action = arguments[1];
if (shapeAssertionError) {
throw shapeAssertionError;
}
{
var warningMessage = getUnexpectedStateShapeWarningMessage(state, finalReducers, action, unexpectedKeyCache);
if (warningMessage) {
warning(warningMessage);
}
}
var hasChanged = false;
var nextState = {};
for (var _i = 0; _i < finalReducerKeys.length; _i++) {
var _key = finalReducerKeys[_i];
var reducer = finalReducers[_key];
var previousStateForKey = state[_key];
var nextStateForKey = reducer(previousStateForKey, action);
if (typeof nextStateForKey === 'undefined') {
var errorMessage = getUndefinedStateErrorMessage(_key, action);
throw new Error(errorMessage);
}
nextState[_key] = nextStateForKey;
hasChanged = hasChanged || nextStateForKey !== previousStateForKey;
}
return hasChanged ? nextState : state;
};
}
function bindActionCreator(actionCreator, dispatch) {
return function () {
return dispatch(actionCreator.apply(undefined, arguments));
};
}
/**
* Turns an object whose values are action creators, into an object with the
* same keys, but with every function wrapped into a `dispatch` call so they
* may be invoked directly. This is just a convenience method, as you can call
* `store.dispatch(MyActionCreators.doSomething())` yourself just fine.
*
* For convenience, you can also pass a single function as the first argument,
* and get a function in return.
*
* @param {Function|Object} actionCreators An object whose values are action
* creator functions. One handy way to obtain it is to use ES6 `import * as`
* syntax. You may also pass a single function.
*
* @param {Function} dispatch The `dispatch` function available on your Redux
* store.
*
* @returns {Function|Object} The object mimicking the original object, but with
* every action creator wrapped into the `dispatch` call. If you passed a
* function as `actionCreators`, the return value will also be a single
* function.
*/
function bindActionCreators(actionCreators, dispatch) {
if (typeof actionCreators === 'function') {
return bindActionCreator(actionCreators, dispatch);
}
if (typeof actionCreators !== 'object' || actionCreators === null) {
throw new Error('bindActionCreators expected an object or a function, instead received ' + (actionCreators === null ? 'null' : typeof actionCreators) + '. ' + 'Did you write "import ActionCreators from" instead of "import * as ActionCreators from"?');
}
var keys = Object.keys(actionCreators);
var boundActionCreators = {};
for (var i = 0; i < keys.length; i++) {
var key = keys[i];
var actionCreator = actionCreators[key];
if (typeof actionCreator === 'function') {
boundActionCreators[key] = bindActionCreator(actionCreator, dispatch);
}
}
return boundActionCreators;
}
/**
* Composes single-argument functions from right to left. The rightmost
* function can take multiple arguments as it provides the signature for
* the resulting composite function.
*
* @param {...Function} funcs The functions to compose.
* @returns {Function} A function obtained by composing the argument functions
* from right to left. For example, compose(f, g, h) is identical to doing
* (...args) => f(g(h(...args))).
*/
function compose() {
for (var _len = arguments.length, funcs = Array(_len), _key = 0; _key < _len; _key++) {
funcs[_key] = arguments[_key];
}
if (funcs.length === 0) {
return function (arg) {
return arg;
};
}
if (funcs.length === 1) {
return funcs[0];
}
return funcs.reduce(function (a, b) {
return function () {
return a(b.apply(undefined, arguments));
};
});
}
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; };
/**
* Creates a store enhancer that applies middleware to the dispatch method
* of the Redux store. This is handy for a variety of tasks, such as expressing
* asynchronous actions in a concise manner, or logging every action payload.
*
* See `redux-thunk` package as an example of the Redux middleware.
*
* Because middleware is potentially asynchronous, this should be the first
* store enhancer in the composition chain.
*
* Note that each middleware will be given the `dispatch` and `getState` functions
* as named arguments.
*
* @param {...Function} middlewares The middleware chain to be applied.
* @returns {Function} A store enhancer applying the middleware.
*/
function applyMiddleware() {
for (var _len = arguments.length, middlewares = Array(_len), _key = 0; _key < _len; _key++) {
middlewares[_key] = arguments[_key];
}
return function (createStore) {
return function (reducer, preloadedState, enhancer) {
var store = createStore(reducer, preloadedState, enhancer);
var _dispatch = store.dispatch;
var chain = [];
var middlewareAPI = {
getState: store.getState,
dispatch: function dispatch(action) {
return _dispatch(action);
}
};
chain = middlewares.map(function (middleware) {
return middleware(middlewareAPI);
});
_dispatch = compose.apply(undefined, chain)(store.dispatch);
return _extends({}, store, {
dispatch: _dispatch
});
};
};
}
/*
* This is a dummy function to check if the function name has been altered by minification.
* If the function has been minified and NODE_ENV !== 'production', warn the user.
*/
function isCrushed() {}
if ("development" !== 'production' && typeof isCrushed.name === 'string' && isCrushed.name !== 'isCrushed') {
warning('You are currently using minified code outside of NODE_ENV === \'production\'. ' + 'This means that you are running a slower development build of Redux. ' + 'You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify ' + 'or DefinePlugin for webpack (http://stackoverflow.com/questions/30030031) ' + 'to ensure you have the correct code for your production build.');
}
exports.createStore = createStore;
exports.combineReducers = combineReducers;
exports.bindActionCreators = bindActionCreators;
exports.applyMiddleware = applyMiddleware;
exports.compose = compose;
Object.defineProperty(exports, '__esModule', { value: true });
})));
