history - npm Package Compare versions

		@@ -1,307 +0,3 @@
		'use strict';

		exports.__esModule = true;

		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 _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 _warning = require('warning');

		var _warning2 = _interopRequireDefault(_warning);

		var _invariant = require('invariant');

		var _invariant2 = _interopRequireDefault(_invariant);

		var _LocationUtils = require('./LocationUtils');

		var _PathUtils = require('./PathUtils');

		var _createTransitionManager = require('./createTransitionManager');

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);

		var _DOMUtils = require('./DOMUtils');

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var PopStateEvent = 'popstate';
		var HashChangeEvent = 'hashchange';

		var getHistoryState = function getHistoryState() {
		try {
		return window.history.state \|\| {};
		} catch (e) {
		// IE 11 sometimes throws when accessing window.history.state
		// See https://github.com/ReactTraining/history/pull/289
		return {};
		}
		};

		/**
		* Creates a history object that uses the HTML5 history API including
		* pushState, replaceState, and the popstate event.
		*/
		var createBrowserHistory = function createBrowserHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

		(0, _invariant2.default)(_DOMUtils.canUseDOM, 'Browser history needs a DOM');

		var globalHistory = window.history;
		var canUseHistory = (0, _DOMUtils.supportsHistory)();
		var needsHashChangeListener = !(0, _DOMUtils.supportsPopStateOnHashChange)();

		var _props$forceRefresh = props.forceRefresh,
		forceRefresh = _props$forceRefresh === undefined ? false : _props$forceRefresh,
		_props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? _DOMUtils.getConfirmation : _props$getUserConfirm,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;

		var basename = props.basename ? (0, _PathUtils.stripTrailingSlash)((0, _PathUtils.addLeadingSlash)(props.basename)) : '';

		var getDOMLocation = function getDOMLocation(historyState) {
		var _ref = historyState \|\| {},
		key = _ref.key,
		state = _ref.state;

		var _window$location = window.location,
		pathname = _window$location.pathname,
		search = _window$location.search,
		hash = _window$location.hash;


		var path = pathname + search + hash;

		(0, _warning2.default)(!basename \|\| (0, _PathUtils.hasBasename)(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');

		if (basename) path = (0, _PathUtils.stripBasename)(path, basename);

		return (0, _LocationUtils.createLocation)(path, state, key);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};

		var transitionManager = (0, _createTransitionManager2.default)();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = globalHistory.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var handlePopState = function handlePopState(event) {
		// Ignore extraneous popstate events in WebKit.
		if ((0, _DOMUtils.isExtraneousPopstateEvent)(event)) return;

		handlePop(getDOMLocation(event.state));
		};

		var handleHashChange = function handleHashChange() {
		handlePop(getDOMLocation(getHistoryState()));
		};

		var forceNextPop = false;

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;

		// TODO: We could probably make this more reliable by
		// keeping a list of keys we've seen in sessionStorage.
		// Instead, we just default to 0 for keys we don't know.

		var toIndex = allKeys.indexOf(toLocation.key);

		if (toIndex === -1) toIndex = 0;

		var fromIndex = allKeys.indexOf(fromLocation.key);

		if (fromIndex === -1) fromIndex = 0;

		var delta = toIndex - fromIndex;

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};

		var initialLocation = getDOMLocation(getHistoryState());
		var allKeys = [initialLocation.key];

		// Public interface

		var createHref = function createHref(location) {
		return basename + (0, _PathUtils.createPath)(location);
		};

		var push = function push(path, state) {
		(0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var href = createHref(location);
		var key = location.key,
		state = location.state;


		if (canUseHistory) {
		globalHistory.pushState({ key: key, state: state }, null, href);

		if (forceRefresh) {
		window.location.href = href;
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		var nextKeys = allKeys.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);

		nextKeys.push(location.key);
		allKeys = nextKeys;

		setState({ action: action, location: location });
		}
		} else {
		(0, _warning2.default)(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history');

		window.location.href = href;
		}
		});
		};

		var replace = function replace(path, state) {
		(0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var href = createHref(location);
		var key = location.key,
		state = location.state;


		if (canUseHistory) {
		globalHistory.replaceState({ key: key, state: state }, null, href);

		if (forceRefresh) {
		window.location.replace(href);
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);

		if (prevIndex !== -1) allKeys[prevIndex] = location.key;

		setState({ action: action, location: location });
		}
		} else {
		(0, _warning2.default)(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history');

		window.location.replace(href);
		}
		});
		};

		var go = function go(n) {
		globalHistory.go(n);
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		(0, _DOMUtils.addEventListener)(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) (0, _DOMUtils.addEventListener)(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		(0, _DOMUtils.removeEventListener)(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) (0, _DOMUtils.removeEventListener)(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createBrowserHistory;
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("createBrowserHistory");
		module.exports = require("./index.js").createBrowserHistory;

327

createHashHistory.js

		@@ -1,324 +0,3 @@
		'use strict';

		exports.__esModule = true;

		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 _warning = require('warning');

		var _warning2 = _interopRequireDefault(_warning);

		var _invariant = require('invariant');

		var _invariant2 = _interopRequireDefault(_invariant);

		var _LocationUtils = require('./LocationUtils');

		var _PathUtils = require('./PathUtils');

		var _createTransitionManager = require('./createTransitionManager');

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);

		var _DOMUtils = require('./DOMUtils');

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var HashChangeEvent = 'hashchange';

		var HashPathCoders = {
		hashbang: {
		encodePath: function encodePath(path) {
		return path.charAt(0) === '!' ? path : '!/' + (0, _PathUtils.stripLeadingSlash)(path);
		},
		decodePath: function decodePath(path) {
		return path.charAt(0) === '!' ? path.substr(1) : path;
		}
		},
		noslash: {
		encodePath: _PathUtils.stripLeadingSlash,
		decodePath: _PathUtils.addLeadingSlash
		},
		slash: {
		encodePath: _PathUtils.addLeadingSlash,
		decodePath: _PathUtils.addLeadingSlash
		}
		};

		var getHashPath = function getHashPath() {
		// We can't use window.location.hash here because it's not
		// consistent across browsers - Firefox will pre-decode it!
		var href = window.location.href;
		var hashIndex = href.indexOf('#');
		return hashIndex === -1 ? '' : href.substring(hashIndex + 1);
		};

		var pushHashPath = function pushHashPath(path) {
		return window.location.hash = path;
		};

		var replaceHashPath = function replaceHashPath(path) {
		var hashIndex = window.location.href.indexOf('#');

		window.location.replace(window.location.href.slice(0, hashIndex >= 0 ? hashIndex : 0) + '#' + path);
		};

		var createHashHistory = function createHashHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

		(0, _invariant2.default)(_DOMUtils.canUseDOM, 'Hash history needs a DOM');

		var globalHistory = window.history;
		var canGoWithoutReload = (0, _DOMUtils.supportsGoWithoutReloadUsingHash)();

		var _props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? _DOMUtils.getConfirmation : _props$getUserConfirm,
		_props$hashType = props.hashType,
		hashType = _props$hashType === undefined ? 'slash' : _props$hashType;

		var basename = props.basename ? (0, _PathUtils.stripTrailingSlash)((0, _PathUtils.addLeadingSlash)(props.basename)) : '';

		var _HashPathCoders$hashT = HashPathCoders[hashType],
		encodePath = _HashPathCoders$hashT.encodePath,
		decodePath = _HashPathCoders$hashT.decodePath;


		var getDOMLocation = function getDOMLocation() {
		var path = decodePath(getHashPath());

		(0, _warning2.default)(!basename \|\| (0, _PathUtils.hasBasename)(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');

		if (basename) path = (0, _PathUtils.stripBasename)(path, basename);

		return (0, _LocationUtils.createLocation)(path);
		};

		var transitionManager = (0, _createTransitionManager2.default)();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = globalHistory.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var forceNextPop = false;
		var ignorePath = null;

		var handleHashChange = function handleHashChange() {
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) {
		// Ensure we always have a properly-encoded hash.
		replaceHashPath(encodedPath);
		} else {
		var location = getDOMLocation();
		var prevLocation = history.location;

		if (!forceNextPop && (0, _LocationUtils.locationsAreEqual)(prevLocation, location)) return; // A hashchange doesn't always == location change.

		if (ignorePath === (0, _PathUtils.createPath)(location)) return; // Ignore this change; we already setState in push/replace.

		ignorePath = null;

		handlePop(location);
		}
		};

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;

		// TODO: We could probably make this more reliable by
		// keeping a list of paths we've seen in sessionStorage.
		// Instead, we just default to 0 for paths we don't know.

		var toIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(toLocation));

		if (toIndex === -1) toIndex = 0;

		var fromIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(fromLocation));

		if (fromIndex === -1) fromIndex = 0;

		var delta = toIndex - fromIndex;

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};

		// Ensure the hash is encoded properly before doing anything else.
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) replaceHashPath(encodedPath);

		var initialLocation = getDOMLocation();
		var allPaths = [(0, _PathUtils.createPath)(initialLocation)];

		// Public interface

		var createHref = function createHref(location) {
		return '#' + encodePath(basename + (0, _PathUtils.createPath)(location));
		};

		var push = function push(path, state) {
		(0, _warning2.default)(state === undefined, 'Hash history cannot push state; it is ignored');

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = (0, _PathUtils.createPath)(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a PUSH, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		pushHashPath(encodedPath);

		var prevIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(history.location));
		var nextPaths = allPaths.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);

		nextPaths.push(path);
		allPaths = nextPaths;

		setState({ action: action, location: location });
		} else {
		(0, _warning2.default)(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack');

		setState();
		}
		});
		};

		var replace = function replace(path, state) {
		(0, _warning2.default)(state === undefined, 'Hash history cannot replace state; it is ignored');

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = (0, _PathUtils.createPath)(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a REPLACE, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		replaceHashPath(encodedPath);
		}

		var prevIndex = allPaths.indexOf((0, _PathUtils.createPath)(history.location));

		if (prevIndex !== -1) allPaths[prevIndex] = path;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		(0, _warning2.default)(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser');

		globalHistory.go(n);
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		(0, _DOMUtils.addEventListener)(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		(0, _DOMUtils.removeEventListener)(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createHashHistory;
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("createHashHistory");
		module.exports = require("./index.js").createHashHistory;

173

createMemoryHistory.js

		@@ -1,170 +0,3 @@
		'use strict';

		exports.__esModule = true;

		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 _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 _warning = require('warning');

		var _warning2 = _interopRequireDefault(_warning);

		var _PathUtils = require('./PathUtils');

		var _LocationUtils = require('./LocationUtils');

		var _createTransitionManager = require('./createTransitionManager');

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var clamp = function clamp(n, lowerBound, upperBound) {
		return Math.min(Math.max(n, lowerBound), upperBound);
		};

		/**
		* Creates a history object that stores locations in memory.
		*/
		var createMemoryHistory = function createMemoryHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
		var getUserConfirmation = props.getUserConfirmation,
		_props$initialEntries = props.initialEntries,
		initialEntries = _props$initialEntries === undefined ? ['/'] : _props$initialEntries,
		_props$initialIndex = props.initialIndex,
		initialIndex = _props$initialIndex === undefined ? 0 : _props$initialIndex,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;


		var transitionManager = (0, _createTransitionManager2.default)();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = history.entries.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};

		var index = clamp(initialIndex, 0, initialEntries.length - 1);
		var entries = initialEntries.map(function (entry) {
		return typeof entry === 'string' ? (0, _LocationUtils.createLocation)(entry, undefined, createKey()) : (0, _LocationUtils.createLocation)(entry, undefined, entry.key \|\| createKey());
		});

		// Public interface

		var createHref = _PathUtils.createPath;

		var push = function push(path, state) {
		(0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var prevIndex = history.index;
		var nextIndex = prevIndex + 1;

		var nextEntries = history.entries.slice(0);
		if (nextEntries.length > nextIndex) {
		nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);
		} else {
		nextEntries.push(location);
		}

		setState({
		action: action,
		location: location,
		index: nextIndex,
		entries: nextEntries
		});
		});
		};

		var replace = function replace(path, state) {
		(0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		history.entries[history.index] = location;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);

		var action = 'POP';
		var location = history.entries[nextIndex];

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location,
		index: nextIndex
		});
		} else {
		// Mimic the behavior of DOM histories by
		// causing a render after a cancelled POP.
		setState();
		}
		});
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var canGo = function canGo(n) {
		var nextIndex = history.index + n;
		return nextIndex >= 0 && nextIndex < history.entries.length;
		};

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
		return transitionManager.setPrompt(prompt);
		};

		var listen = function listen(listener) {
		return transitionManager.appendListener(listener);
		};

		var history = {
		length: entries.length,
		action: 'POP',
		location: entries[index],
		index: index,
		entries: entries,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		canGo: canGo,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createMemoryHistory;
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("createMemoryHistory");
		module.exports = require("./index.js").createMemoryHistory;

createTransitionManager.js

		@@ -1,85 +0,3 @@
		'use strict';

		exports.__esModule = true;

		var _warning = require('warning');

		var _warning2 = _interopRequireDefault(_warning);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var createTransitionManager = function createTransitionManager() {
		var prompt = null;

		var setPrompt = function setPrompt(nextPrompt) {
		(0, _warning2.default)(prompt == null, 'A history supports only one prompt at a time');

		prompt = nextPrompt;

		return function () {
		if (prompt === nextPrompt) prompt = null;
		};
		};

		var confirmTransitionTo = function confirmTransitionTo(location, action, getUserConfirmation, callback) {
		// TODO: If another transition starts while we're still confirming
		// the previous one, we may end up in a weird state. Figure out the
		// best way to handle this.
		if (prompt != null) {
		var result = typeof prompt === 'function' ? prompt(location, action) : prompt;

		if (typeof result === 'string') {
		if (typeof getUserConfirmation === 'function') {
		getUserConfirmation(result, callback);
		} else {
		(0, _warning2.default)(false, 'A history needs a getUserConfirmation function in order to use a prompt message');

		callback(true);
		}
		} else {
		// Return false from a transition hook to cancel the transition.
		callback(result !== false);
		}
		} else {
		callback(true);
		}
		};

		var listeners = [];

		var appendListener = function appendListener(fn) {
		var isActive = true;

		var listener = function listener() {
		if (isActive) fn.apply(undefined, arguments);
		};

		listeners.push(listener);

		return function () {
		isActive = false;
		listeners = listeners.filter(function (item) {
		return item !== listener;
		});
		};
		};

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

		listeners.forEach(function (listener) {
		return listener.apply(undefined, args);
		});
		};

		return {
		setPrompt: setPrompt,
		confirmTransitionTo: confirmTransitionTo,
		appendListener: appendListener,
		notifyListeners: notifyListeners
		};
		};

		exports.default = createTransitionManager;
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("createTransitionManager");
		module.exports = require("./index.js").createTransitionManager;

DOMUtils.js

		@@ -1,55 +0,3 @@
		'use strict';

		exports.__esModule = true;
		var canUseDOM = exports.canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);

		var addEventListener = exports.addEventListener = function addEventListener(node, event, listener) {
		return node.addEventListener ? node.addEventListener(event, listener, false) : node.attachEvent('on' + event, listener);
		};

		var removeEventListener = exports.removeEventListener = function removeEventListener(node, event, listener) {
		return node.removeEventListener ? node.removeEventListener(event, listener, false) : node.detachEvent('on' + event, listener);
		};

		var getConfirmation = exports.getConfirmation = function getConfirmation(message, callback) {
		return callback(window.confirm(message));
		}; // eslint-disable-line no-alert

		/**
		* Returns true if the HTML5 history API is supported. Taken from Modernizr.
		*
		* https://github.com/Modernizr/Modernizr/blob/master/LICENSE
		* https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
		* changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586
		*/
		var supportsHistory = exports.supportsHistory = function supportsHistory() {
		var ua = window.navigator.userAgent;

		if ((ua.indexOf('Android 2.') !== -1 \|\| ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;

		return window.history && 'pushState' in window.history;
		};

		/**
		* Returns true if browser fires popstate on hash change.
		* IE10 and IE11 do not.
		*/
		var supportsPopStateOnHashChange = exports.supportsPopStateOnHashChange = function supportsPopStateOnHashChange() {
		return window.navigator.userAgent.indexOf('Trident') === -1;
		};

		/**
		* Returns false if using go(n) with hash history causes a full page reload.
		*/
		var supportsGoWithoutReloadUsingHash = exports.supportsGoWithoutReloadUsingHash = function supportsGoWithoutReloadUsingHash() {
		return window.navigator.userAgent.indexOf('Firefox') === -1;
		};

		/**
		* Returns true if a given popstate event is an extraneous WebKit event.
		* Accounts for the fact that Chrome on iOS fires real popstate events
		* containing undefined state when pressing the back button.
		*/
		var isExtraneousPopstateEvent = exports.isExtraneousPopstateEvent = function isExtraneousPopstateEvent(event) {
		return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;
		};
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("DOMUtils");
		module.exports = require("./index.js").DOMUtils;

293

es/createBrowserHistory.js

		@@ -1,290 +0,7 @@
		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; };
		"use strict";

		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; };
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("createBrowserHistory");

		import warning from 'warning';
		import invariant from 'invariant';
		import { createLocation } from './LocationUtils';
		import { addLeadingSlash, stripTrailingSlash, hasBasename, stripBasename, createPath } from './PathUtils';
		import createTransitionManager from './createTransitionManager';
		import { canUseDOM, addEventListener, removeEventListener, getConfirmation, supportsHistory, supportsPopStateOnHashChange, isExtraneousPopstateEvent } from './DOMUtils';

		var PopStateEvent = 'popstate';
		var HashChangeEvent = 'hashchange';

		var getHistoryState = function getHistoryState() {
		try {
		return window.history.state \|\| {};
		} catch (e) {
		// IE 11 sometimes throws when accessing window.history.state
		// See https://github.com/ReactTraining/history/pull/289
		return {};
		}
		};

		/**
		* Creates a history object that uses the HTML5 history API including
		* pushState, replaceState, and the popstate event.
		*/
		var createBrowserHistory = function createBrowserHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

		invariant(canUseDOM, 'Browser history needs a DOM');

		var globalHistory = window.history;
		var canUseHistory = supportsHistory();
		var needsHashChangeListener = !supportsPopStateOnHashChange();

		var _props$forceRefresh = props.forceRefresh,
		forceRefresh = _props$forceRefresh === undefined ? false : _props$forceRefresh,
		_props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? getConfirmation : _props$getUserConfirm,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;

		var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';

		var getDOMLocation = function getDOMLocation(historyState) {
		var _ref = historyState \|\| {},
		key = _ref.key,
		state = _ref.state;

		var _window$location = window.location,
		pathname = _window$location.pathname,
		search = _window$location.search,
		hash = _window$location.hash;


		var path = pathname + search + hash;

		warning(!basename \|\| hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');

		if (basename) path = stripBasename(path, basename);

		return createLocation(path, state, key);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};

		var transitionManager = createTransitionManager();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = globalHistory.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var handlePopState = function handlePopState(event) {
		// Ignore extraneous popstate events in WebKit.
		if (isExtraneousPopstateEvent(event)) return;

		handlePop(getDOMLocation(event.state));
		};

		var handleHashChange = function handleHashChange() {
		handlePop(getDOMLocation(getHistoryState()));
		};

		var forceNextPop = false;

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;

		// TODO: We could probably make this more reliable by
		// keeping a list of keys we've seen in sessionStorage.
		// Instead, we just default to 0 for keys we don't know.

		var toIndex = allKeys.indexOf(toLocation.key);

		if (toIndex === -1) toIndex = 0;

		var fromIndex = allKeys.indexOf(fromLocation.key);

		if (fromIndex === -1) fromIndex = 0;

		var delta = toIndex - fromIndex;

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};

		var initialLocation = getDOMLocation(getHistoryState());
		var allKeys = [initialLocation.key];

		// Public interface

		var createHref = function createHref(location) {
		return basename + createPath(location);
		};

		var push = function push(path, state) {
		warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'PUSH';
		var location = createLocation(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var href = createHref(location);
		var key = location.key,
		state = location.state;


		if (canUseHistory) {
		globalHistory.pushState({ key: key, state: state }, null, href);

		if (forceRefresh) {
		window.location.href = href;
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		var nextKeys = allKeys.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);

		nextKeys.push(location.key);
		allKeys = nextKeys;

		setState({ action: action, location: location });
		}
		} else {
		warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history');

		window.location.href = href;
		}
		});
		};

		var replace = function replace(path, state) {
		warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'REPLACE';
		var location = createLocation(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var href = createHref(location);
		var key = location.key,
		state = location.state;


		if (canUseHistory) {
		globalHistory.replaceState({ key: key, state: state }, null, href);

		if (forceRefresh) {
		window.location.replace(href);
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);

		if (prevIndex !== -1) allKeys[prevIndex] = location.key;

		setState({ action: action, location: location });
		}
		} else {
		warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history');

		window.location.replace(href);
		}
		});
		};

		var go = function go(n) {
		globalHistory.go(n);
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		addEventListener(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) addEventListener(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		removeEventListener(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) removeEventListener(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		export default createBrowserHistory;
		import { createBrowserHistory } from "../esm/history.js";
		export default createBrowserHistory;

310

es/createHashHistory.js

		@@ -1,307 +0,7 @@
		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; };
		"use strict";

		import warning from 'warning';
		import invariant from 'invariant';
		import { createLocation, locationsAreEqual } from './LocationUtils';
		import { addLeadingSlash, stripLeadingSlash, stripTrailingSlash, hasBasename, stripBasename, createPath } from './PathUtils';
		import createTransitionManager from './createTransitionManager';
		import { canUseDOM, addEventListener, removeEventListener, getConfirmation, supportsGoWithoutReloadUsingHash } from './DOMUtils';
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("createHashHistory");

		var HashChangeEvent = 'hashchange';

		var HashPathCoders = {
		hashbang: {
		encodePath: function encodePath(path) {
		return path.charAt(0) === '!' ? path : '!/' + stripLeadingSlash(path);
		},
		decodePath: function decodePath(path) {
		return path.charAt(0) === '!' ? path.substr(1) : path;
		}
		},
		noslash: {
		encodePath: stripLeadingSlash,
		decodePath: addLeadingSlash
		},
		slash: {
		encodePath: addLeadingSlash,
		decodePath: addLeadingSlash
		}
		};

		var getHashPath = function getHashPath() {
		// We can't use window.location.hash here because it's not
		// consistent across browsers - Firefox will pre-decode it!
		var href = window.location.href;
		var hashIndex = href.indexOf('#');
		return hashIndex === -1 ? '' : href.substring(hashIndex + 1);
		};

		var pushHashPath = function pushHashPath(path) {
		return window.location.hash = path;
		};

		var replaceHashPath = function replaceHashPath(path) {
		var hashIndex = window.location.href.indexOf('#');

		window.location.replace(window.location.href.slice(0, hashIndex >= 0 ? hashIndex : 0) + '#' + path);
		};

		var createHashHistory = function createHashHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

		invariant(canUseDOM, 'Hash history needs a DOM');

		var globalHistory = window.history;
		var canGoWithoutReload = supportsGoWithoutReloadUsingHash();

		var _props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? getConfirmation : _props$getUserConfirm,
		_props$hashType = props.hashType,
		hashType = _props$hashType === undefined ? 'slash' : _props$hashType;

		var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';

		var _HashPathCoders$hashT = HashPathCoders[hashType],
		encodePath = _HashPathCoders$hashT.encodePath,
		decodePath = _HashPathCoders$hashT.decodePath;


		var getDOMLocation = function getDOMLocation() {
		var path = decodePath(getHashPath());

		warning(!basename \|\| hasBasename(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');

		if (basename) path = stripBasename(path, basename);

		return createLocation(path);
		};

		var transitionManager = createTransitionManager();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = globalHistory.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var forceNextPop = false;
		var ignorePath = null;

		var handleHashChange = function handleHashChange() {
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) {
		// Ensure we always have a properly-encoded hash.
		replaceHashPath(encodedPath);
		} else {
		var location = getDOMLocation();
		var prevLocation = history.location;

		if (!forceNextPop && locationsAreEqual(prevLocation, location)) return; // A hashchange doesn't always == location change.

		if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.

		ignorePath = null;

		handlePop(location);
		}
		};

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;

		// TODO: We could probably make this more reliable by
		// keeping a list of paths we've seen in sessionStorage.
		// Instead, we just default to 0 for paths we don't know.

		var toIndex = allPaths.lastIndexOf(createPath(toLocation));

		if (toIndex === -1) toIndex = 0;

		var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));

		if (fromIndex === -1) fromIndex = 0;

		var delta = toIndex - fromIndex;

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};

		// Ensure the hash is encoded properly before doing anything else.
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) replaceHashPath(encodedPath);

		var initialLocation = getDOMLocation();
		var allPaths = [createPath(initialLocation)];

		// Public interface

		var createHref = function createHref(location) {
		return '#' + encodePath(basename + createPath(location));
		};

		var push = function push(path, state) {
		warning(state === undefined, 'Hash history cannot push state; it is ignored');

		var action = 'PUSH';
		var location = createLocation(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = createPath(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a PUSH, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		pushHashPath(encodedPath);

		var prevIndex = allPaths.lastIndexOf(createPath(history.location));
		var nextPaths = allPaths.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);

		nextPaths.push(path);
		allPaths = nextPaths;

		setState({ action: action, location: location });
		} else {
		warning(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack');

		setState();
		}
		});
		};

		var replace = function replace(path, state) {
		warning(state === undefined, 'Hash history cannot replace state; it is ignored');

		var action = 'REPLACE';
		var location = createLocation(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = createPath(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a REPLACE, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		replaceHashPath(encodedPath);
		}

		var prevIndex = allPaths.indexOf(createPath(history.location));

		if (prevIndex !== -1) allPaths[prevIndex] = path;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		warning(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser');

		globalHistory.go(n);
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		addEventListener(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		removeEventListener(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		export default createHashHistory;
		import { createHashHistory } from "../esm/history.js";
		export default createHashHistory;

160

es/createMemoryHistory.js

		@@ -1,157 +0,7 @@
		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; };
		"use strict";

		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; };
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("createMemoryHistory");

		import warning from 'warning';
		import { createPath } from './PathUtils';
		import { createLocation } from './LocationUtils';
		import createTransitionManager from './createTransitionManager';

		var clamp = function clamp(n, lowerBound, upperBound) {
		return Math.min(Math.max(n, lowerBound), upperBound);
		};

		/**
		* Creates a history object that stores locations in memory.
		*/
		var createMemoryHistory = function createMemoryHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
		var getUserConfirmation = props.getUserConfirmation,
		_props$initialEntries = props.initialEntries,
		initialEntries = _props$initialEntries === undefined ? ['/'] : _props$initialEntries,
		_props$initialIndex = props.initialIndex,
		initialIndex = _props$initialIndex === undefined ? 0 : _props$initialIndex,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;


		var transitionManager = createTransitionManager();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = history.entries.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};

		var index = clamp(initialIndex, 0, initialEntries.length - 1);
		var entries = initialEntries.map(function (entry) {
		return typeof entry === 'string' ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key \|\| createKey());
		});

		// Public interface

		var createHref = createPath;

		var push = function push(path, state) {
		warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'PUSH';
		var location = createLocation(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var prevIndex = history.index;
		var nextIndex = prevIndex + 1;

		var nextEntries = history.entries.slice(0);
		if (nextEntries.length > nextIndex) {
		nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);
		} else {
		nextEntries.push(location);
		}

		setState({
		action: action,
		location: location,
		index: nextIndex,
		entries: nextEntries
		});
		});
		};

		var replace = function replace(path, state) {
		warning(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored');

		var action = 'REPLACE';
		var location = createLocation(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		history.entries[history.index] = location;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);

		var action = 'POP';
		var location = history.entries[nextIndex];

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location,
		index: nextIndex
		});
		} else {
		// Mimic the behavior of DOM histories by
		// causing a render after a cancelled POP.
		setState();
		}
		});
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var canGo = function canGo(n) {
		var nextIndex = history.index + n;
		return nextIndex >= 0 && nextIndex < history.entries.length;
		};

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
		return transitionManager.setPrompt(prompt);
		};

		var listen = function listen(listener) {
		return transitionManager.appendListener(listener);
		};

		var history = {
		length: entries.length,
		action: 'POP',
		location: entries[index],
		index: index,
		entries: entries,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		canGo: canGo,
		block: block,
		listen: listen
		};

		return history;
		};

		export default createMemoryHistory;
		import { createMemoryHistory } from "../esm/history.js";
		export default createMemoryHistory;

es/createTransitionManager.js

		@@ -1,77 +0,7 @@
		import warning from 'warning';
		"use strict";

		var createTransitionManager = function createTransitionManager() {
		var prompt = null;
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("createTransitionManager");

		var setPrompt = function setPrompt(nextPrompt) {
		warning(prompt == null, 'A history supports only one prompt at a time');

		prompt = nextPrompt;

		return function () {
		if (prompt === nextPrompt) prompt = null;
		};
		};

		var confirmTransitionTo = function confirmTransitionTo(location, action, getUserConfirmation, callback) {
		// TODO: If another transition starts while we're still confirming
		// the previous one, we may end up in a weird state. Figure out the
		// best way to handle this.
		if (prompt != null) {
		var result = typeof prompt === 'function' ? prompt(location, action) : prompt;

		if (typeof result === 'string') {
		if (typeof getUserConfirmation === 'function') {
		getUserConfirmation(result, callback);
		} else {
		warning(false, 'A history needs a getUserConfirmation function in order to use a prompt message');

		callback(true);
		}
		} else {
		// Return false from a transition hook to cancel the transition.
		callback(result !== false);
		}
		} else {
		callback(true);
		}
		};

		var listeners = [];

		var appendListener = function appendListener(fn) {
		var isActive = true;

		var listener = function listener() {
		if (isActive) fn.apply(undefined, arguments);
		};

		listeners.push(listener);

		return function () {
		isActive = false;
		listeners = listeners.filter(function (item) {
		return item !== listener;
		});
		};
		};

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

		listeners.forEach(function (listener) {
		return listener.apply(undefined, args);
		});
		};

		return {
		setPrompt: setPrompt,
		confirmTransitionTo: confirmTransitionTo,
		appendListener: appendListener,
		notifyListeners: notifyListeners
		};
		};

		export default createTransitionManager;
		import { createTransitionManager } from "../esm/history.js";
		export default createTransitionManager;

es/DOMUtils.js

		@@ -1,52 +0,7 @@
		export var canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
		"use strict";

		export var addEventListener = function addEventListener(node, event, listener) {
		return node.addEventListener ? node.addEventListener(event, listener, false) : node.attachEvent('on' + event, listener);
		};
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("DOMUtils");

		export var removeEventListener = function removeEventListener(node, event, listener) {
		return node.removeEventListener ? node.removeEventListener(event, listener, false) : node.detachEvent('on' + event, listener);
		};

		export var getConfirmation = function getConfirmation(message, callback) {
		return callback(window.confirm(message));
		}; // eslint-disable-line no-alert

		/**
		* Returns true if the HTML5 history API is supported. Taken from Modernizr.
		*
		* https://github.com/Modernizr/Modernizr/blob/master/LICENSE
		* https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
		* changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586
		*/
		export var supportsHistory = function supportsHistory() {
		var ua = window.navigator.userAgent;

		if ((ua.indexOf('Android 2.') !== -1 \|\| ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;

		return window.history && 'pushState' in window.history;
		};

		/**
		* Returns true if browser fires popstate on hash change.
		* IE10 and IE11 do not.
		*/
		export var supportsPopStateOnHashChange = function supportsPopStateOnHashChange() {
		return window.navigator.userAgent.indexOf('Trident') === -1;
		};

		/**
		* Returns false if using go(n) with hash history causes a full page reload.
		*/
		export var supportsGoWithoutReloadUsingHash = function supportsGoWithoutReloadUsingHash() {
		return window.navigator.userAgent.indexOf('Firefox') === -1;
		};

		/**
		* Returns true if a given popstate event is an extraneous WebKit event.
		* Accounts for the fact that Chrome on iOS fires real popstate events
		* containing undefined state when pressing the back button.
		*/
		export var isExtraneousPopstateEvent = function isExtraneousPopstateEvent(event) {
		return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;
		};
		import { DOMUtils } from "../esm/history.js";
		export default DOMUtils;

es/LocationUtils.js

		@@ -1,65 +0,7 @@
		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; };
		"use strict";

		import resolvePathname from 'resolve-pathname';
		import valueEqual from 'value-equal';
		import { parsePath } from './PathUtils';
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("LocationUtils");

		export var createLocation = function createLocation(path, state, key, currentLocation) {
		var location = void 0;
		if (typeof path === 'string') {
		// Two-arg form: push(path, state)
		location = parsePath(path);
		location.state = state;
		} else {
		// One-arg form: push(location)
		location = _extends({}, path);

		if (location.pathname === undefined) location.pathname = '';

		if (location.search) {
		if (location.search.charAt(0) !== '?') location.search = '?' + location.search;
		} else {
		location.search = '';
		}

		if (location.hash) {
		if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;
		} else {
		location.hash = '';
		}

		if (state !== undefined && location.state === undefined) location.state = state;
		}

		try {
		location.pathname = decodeURI(location.pathname);
		} catch (e) {
		if (e instanceof URIError) {
		throw new URIError('Pathname "' + location.pathname + '" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');
		} else {
		throw e;
		}
		}

		if (key) location.key = key;

		if (currentLocation) {
		// Resolve incomplete/relative pathname relative to current location.
		if (!location.pathname) {
		location.pathname = currentLocation.pathname;
		} else if (location.pathname.charAt(0) !== '/') {
		location.pathname = resolvePathname(location.pathname, currentLocation.pathname);
		}
		} else {
		// When there is no prior location and pathname is empty, set it to /
		if (!location.pathname) {
		location.pathname = '/';
		}
		}

		return location;
		};

		export var locationsAreEqual = function locationsAreEqual(a, b) {
		return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);
		};
		import { LocationUtils } from "../esm/history.js";
		export default LocationUtils;

es/PathUtils.js

		@@ -1,58 +0,7 @@
		export var addLeadingSlash = function addLeadingSlash(path) {
		return path.charAt(0) === '/' ? path : '/' + path;
		};
		"use strict";

		export var stripLeadingSlash = function stripLeadingSlash(path) {
		return path.charAt(0) === '/' ? path.substr(1) : path;
		};
		import warnAboutDeprecatedESMImport from "./warnAboutDeprecatedESMImport.js";
		warnAboutDeprecatedESMImport("PathUtils");

		export var hasBasename = function hasBasename(path, prefix) {
		return new RegExp('^' + prefix + '(\\/\|\\?\|#\|$)', 'i').test(path);
		};

		export var stripBasename = function stripBasename(path, prefix) {
		return hasBasename(path, prefix) ? path.substr(prefix.length) : path;
		};

		export var stripTrailingSlash = function stripTrailingSlash(path) {
		return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;
		};

		export var parsePath = function parsePath(path) {
		var pathname = path \|\| '/';
		var search = '';
		var hash = '';

		var hashIndex = pathname.indexOf('#');
		if (hashIndex !== -1) {
		hash = pathname.substr(hashIndex);
		pathname = pathname.substr(0, hashIndex);
		}

		var searchIndex = pathname.indexOf('?');
		if (searchIndex !== -1) {
		search = pathname.substr(searchIndex);
		pathname = pathname.substr(0, searchIndex);
		}

		return {
		pathname: pathname,
		search: search === '?' ? '' : search,
		hash: hash === '#' ? '' : hash
		};
		};

		export var createPath = function createPath(location) {
		var pathname = location.pathname,
		search = location.search,
		hash = location.hash;


		var path = pathname \|\| '/';

		if (search && search !== '?') path += search.charAt(0) === '?' ? search : '?' + search;

		if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : '#' + hash;

		return path;
		};
		import { PathUtils } from "../esm/history.js";
		export default PathUtils;

index.js

		@@ -1,52 +0,7 @@
		'use strict';
		"use strict";

		exports.__esModule = true;
		exports.createPath = exports.parsePath = exports.locationsAreEqual = exports.createLocation = exports.createMemoryHistory = exports.createHashHistory = exports.createBrowserHistory = undefined;

		var _LocationUtils = require('./LocationUtils');

		Object.defineProperty(exports, 'createLocation', {
		enumerable: true,
		get: function get() {
		return _LocationUtils.createLocation;
		}
		});
		Object.defineProperty(exports, 'locationsAreEqual', {
		enumerable: true,
		get: function get() {
		return _LocationUtils.locationsAreEqual;
		}
		});

		var _PathUtils = require('./PathUtils');

		Object.defineProperty(exports, 'parsePath', {
		enumerable: true,
		get: function get() {
		return _PathUtils.parsePath;
		}
		});
		Object.defineProperty(exports, 'createPath', {
		enumerable: true,
		get: function get() {
		return _PathUtils.createPath;
		}
		});

		var _createBrowserHistory2 = require('./createBrowserHistory');

		var _createBrowserHistory3 = _interopRequireDefault(_createBrowserHistory2);

		var _createHashHistory2 = require('./createHashHistory');

		var _createHashHistory3 = _interopRequireDefault(_createHashHistory2);

		var _createMemoryHistory2 = require('./createMemoryHistory');

		var _createMemoryHistory3 = _interopRequireDefault(_createMemoryHistory2);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		exports.createBrowserHistory = _createBrowserHistory3.default;
		exports.createHashHistory = _createHashHistory3.default;
		exports.createMemoryHistory = _createMemoryHistory3.default;
		if (process.env.NODE_ENV === "production") {
		module.exports = require("./cjs/history.min.js");
		} else {
		module.exports = require("./cjs/history.js");
		}

LocationUtils.js

		@@ -1,78 +0,3 @@
		'use strict';

		exports.__esModule = true;
		exports.locationsAreEqual = exports.createLocation = undefined;

		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 _resolvePathname = require('resolve-pathname');

		var _resolvePathname2 = _interopRequireDefault(_resolvePathname);

		var _valueEqual = require('value-equal');

		var _valueEqual2 = _interopRequireDefault(_valueEqual);

		var _PathUtils = require('./PathUtils');

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var createLocation = exports.createLocation = function createLocation(path, state, key, currentLocation) {
		var location = void 0;
		if (typeof path === 'string') {
		// Two-arg form: push(path, state)
		location = (0, _PathUtils.parsePath)(path);
		location.state = state;
		} else {
		// One-arg form: push(location)
		location = _extends({}, path);

		if (location.pathname === undefined) location.pathname = '';

		if (location.search) {
		if (location.search.charAt(0) !== '?') location.search = '?' + location.search;
		} else {
		location.search = '';
		}

		if (location.hash) {
		if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;
		} else {
		location.hash = '';
		}

		if (state !== undefined && location.state === undefined) location.state = state;
		}

		try {
		location.pathname = decodeURI(location.pathname);
		} catch (e) {
		if (e instanceof URIError) {
		throw new URIError('Pathname "' + location.pathname + '" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');
		} else {
		throw e;
		}
		}

		if (key) location.key = key;

		if (currentLocation) {
		// Resolve incomplete/relative pathname relative to current location.
		if (!location.pathname) {
		location.pathname = currentLocation.pathname;
		} else if (location.pathname.charAt(0) !== '/') {
		location.pathname = (0, _resolvePathname2.default)(location.pathname, currentLocation.pathname);
		}
		} else {
		// When there is no prior location and pathname is empty, set it to /
		if (!location.pathname) {
		location.pathname = '/';
		}
		}

		return location;
		};

		var locationsAreEqual = exports.locationsAreEqual = function locationsAreEqual(a, b) {
		return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && (0, _valueEqual2.default)(a.state, b.state);
		};
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("LocationUtils");
		module.exports = require("./index.js").LocationUtils;

package.json

		{
		"name": "history",
		"version": "4.7.2",
		"version": "4.8.0-beta.0",
		"description": "Manage session history with JavaScript",
		@@ -8,2 +8,4 @@ "repository": "ReactTraining/history",
		"author": "Michael Jackson",
		"main": "index.js",
		"module": "esm/history.js",
		"files": [
		@@ -14,2 +16,3 @@ "DOMUtils.js",
		"PathUtils.js",
		"cjs",
		"createBrowserHistory.js",
		@@ -20,13 +23,11 @@ "createHashHistory.js",
		"es",
		"index.js",
		"umd"
		"esm",
		"umd",
		"warnAboutDeprecatedCJSRequire.js"
		],
		"main": "index.js",
		"module": "es/index.js",
		"sideEffects": false,
		"scripts": {
		"start": "webpack-dev-server -d --content-base ./ --history-api-fallback --inline modules/index.js",
		"build": "node ./tools/build.js",
		"prepublish": "node ./tools/build.js",
		"build": "del cjs esm umd && rollup -c",
		"prepublishOnly": "del cjs esm umd && rollup -c",
		"clean": "git clean -fdX .",
		"release": "node ./tools/release.js",
		"lint": "eslint modules",
		@@ -36,35 +37,40 @@ "test": "karma start --single-run"
		"dependencies": {
		"invariant": "^2.2.1",
		"@babel/runtime": "^7.1.2",
		"loose-envify": "^1.2.0",
		"resolve-pathname": "^2.2.0",
		"value-equal": "^0.4.0",
		"warning": "^3.0.0"
		"tiny-invariant": "^1.0.2",
		"tiny-warning": "^1.0.0",
		"value-equal": "^0.4.0"
		},
		"devDependencies": {
		"babel-cli": "^6.18.0",
		"babel-core": "^6.23.1",
		"@babel/core": "^7.1.2",
		"@babel/plugin-transform-object-assign": "^7.0.0",
		"@babel/plugin-transform-runtime": "^7.1.0",
		"@babel/preset-env": "^7.1.0",
		"babel-core": "^6.26.3",
		"babel-eslint": "^7.0.0",
		"babel-loader": "^6.2.10",
		"babel-loader": "^8.0.4",
		"babel-plugin-dev-expression": "^0.2.1",
		"babel-plugin-transform-object-assign": "^6.8.0",
		"babel-preset-es2015": "^6.9.0",
		"babel-preset-stage-1": "^6.5.0",
		"del-cli": "^1.1.0",
		"eslint": "^3.3.0",
		"eslint-plugin-import": "^2.0.0",
		"expect": "^1.20.1",
		"gzip-size": "^3.0.0",
		"in-publish": "^2.0.0",
		"karma": "^1.2.0",
		"karma-browserstack-launcher": "^1.0.1",
		"karma-chrome-launcher": "^2.0.0",
		"karma-firefox-launcher": "^1.0.0",
		"karma-mocha": "^1.0.1",
		"karma-mocha-reporter": "^2.0.4",
		"expect": "^21.0.0",
		"jest-mock": "^21.0.0",
		"karma": "^3.1.1",
		"karma-browserstack-launcher": "^1.3.0",
		"karma-chrome-launcher": "^2.2.0",
		"karma-firefox-launcher": "^1.1.0",
		"karma-mocha": "^1.3.0",
		"karma-mocha-reporter": "^2.2.5",
		"karma-sourcemap-loader": "^0.3.7",
		"karma-webpack": "^2.0.1",
		"mocha": "^3.0.2",
		"pretty-bytes": "^4.0.2",
		"readline-sync": "^1.4.4",
		"webpack": "^1.13.1",
		"webpack-dev-server": "^1.14.1"
		"karma-webpack": "^3.0.5",
		"mocha": "^5.2.0",
		"rollup": "^0.66.6",
		"rollup-plugin-babel": "^4.0.3",
		"rollup-plugin-commonjs": "^9.2.0",
		"rollup-plugin-node-resolve": "^3.4.0",
		"rollup-plugin-replace": "^2.1.0",
		"rollup-plugin-size-snapshot": "^0.7.0",
		"rollup-plugin-uglify": "^6.0.0",
		"webpack": "^3.12.0"
		},
		@@ -71,0 +77,0 @@ "browserify": {

PathUtils.js

		@@ -1,61 +0,3 @@
		'use strict';

		exports.__esModule = true;
		var addLeadingSlash = exports.addLeadingSlash = function addLeadingSlash(path) {
		return path.charAt(0) === '/' ? path : '/' + path;
		};

		var stripLeadingSlash = exports.stripLeadingSlash = function stripLeadingSlash(path) {
		return path.charAt(0) === '/' ? path.substr(1) : path;
		};

		var hasBasename = exports.hasBasename = function hasBasename(path, prefix) {
		return new RegExp('^' + prefix + '(\\/\|\\?\|#\|$)', 'i').test(path);
		};

		var stripBasename = exports.stripBasename = function stripBasename(path, prefix) {
		return hasBasename(path, prefix) ? path.substr(prefix.length) : path;
		};

		var stripTrailingSlash = exports.stripTrailingSlash = function stripTrailingSlash(path) {
		return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;
		};

		var parsePath = exports.parsePath = function parsePath(path) {
		var pathname = path \|\| '/';
		var search = '';
		var hash = '';

		var hashIndex = pathname.indexOf('#');
		if (hashIndex !== -1) {
		hash = pathname.substr(hashIndex);
		pathname = pathname.substr(0, hashIndex);
		}

		var searchIndex = pathname.indexOf('?');
		if (searchIndex !== -1) {
		search = pathname.substr(searchIndex);
		pathname = pathname.substr(0, searchIndex);
		}

		return {
		pathname: pathname,
		search: search === '?' ? '' : search,
		hash: hash === '#' ? '' : hash
		};
		};

		var createPath = exports.createPath = function createPath(location) {
		var pathname = location.pathname,
		search = location.search,
		hash = location.hash;


		var path = pathname \|\| '/';

		if (search && search !== '?') path += search.charAt(0) === '?' ? search : '?' + search;

		if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : '#' + hash;

		return path;
		};
		"use strict";
		require("./warnAboutDeprecatedCJSRequire.js")("PathUtils");
		module.exports = require("./index.js").PathUtils;

121

README.md

		@@ -5,3 +5,2 @@ # history [![Travis][build-badge]][build] [![npm package][npm-badge]][npm]
		[build]: https://travis-ci.org/ReactTraining/history

		[npm-badge]: https://img.shields.io/npm/v/history.svg?style=flat-square
		@@ -22,6 +21,6 @@ [npm]: https://www.npmjs.org/package/history
		// using ES6 modules
		import createHistory from 'history/createBrowserHistory'
		import { createBrowserHistory } from "history";

		// using CommonJS modules
		var createHistory = require('history').createBrowserHistory
		var createBrowserHistory = require("history").createBrowserHistory;
		```
		@@ -50,8 +49,8 @@
		```js
		import createHistory from 'history/createBrowserHistory'
		import { createBrowserHistory } from "history";

		const history = createHistory()
		const history = createHistory();

		// Get the current location.
		const location = history.location
		const location = history.location;

		@@ -61,10 +60,10 @@ // Listen for changes to the current location.
		// location is an object like window.location
		console.log(action, location.pathname, location.state)
		})
		console.log(action, location.pathname, location.state);
		});

		// Use push, replace, and go to navigate around.
		history.push('/home', { some: 'state' })
		history.push("/home", { some: "state" });

		// To stop listening, call the function returned from listen().
		unlisten()
		unlisten();
		```
		@@ -76,24 +75,24 @@
		createBrowserHistory({
		basename: '', // The base URL of the app (see below)
		forceRefresh: false, // Set true to force full page refreshes
		keyLength: 6, // The length of location.key
		basename: "", // The base URL of the app (see below)
		forceRefresh: false, // Set true to force full page refreshes
		keyLength: 6, // The length of location.key
		// A function to use to confirm navigation with the user (see below)
		getUserConfirmation: (message, callback) => callback(window.confirm(message))
		})
		});

		createMemoryHistory({
		initialEntries: [ '/' ], // The initial URLs in the history stack
		initialIndex: 0, // The starting index in the history stack
		keyLength: 6, // The length of location.key
		initialEntries: ["/"], // The initial URLs in the history stack
		initialIndex: 0, // The starting index in the history stack
		keyLength: 6, // The length of location.key
		// A function to use to confirm navigation with the user. Required
		// if you return string prompts from transition hooks (see below)
		getUserConfirmation: null
		})
		});

		createHashHistory({
		basename: '', // The base URL of the app (see below)
		hashType: 'slash', // The hash type to use (see below)
		basename: "", // The base URL of the app (see below)
		hashType: "slash", // The hash type to use (see below)
		// A function to use to confirm navigation with the user (see below)
		getUserConfirmation: (message, callback) => callback(window.confirm(message))
		})
		});
		```
		@@ -117,5 +116,7 @@
		history.listen((location, action) => {
		console.log(`The current URL is ${location.pathname}${location.search}${location.hash}`)
		console.log(`The last navigation action was ${action}`)
		})
		console.log(
		`The current URL is ${location.pathname}${location.search}${location.hash}`
		);
		console.log(`The last navigation action was ${action}`);
		});
		```
		@@ -138,3 +139,3 @@

		`history` objects may be used programmatically change the current location using the following methods:
		`history` objects may be used to programmatically change the current location using the following methods:

		@@ -150,3 +151,3 @@ - `history.push(path, [state])`

		1. A URL path or
		1. A URL path _or_
		2. A location-like object with `{ pathname, search, hash, state }`
		@@ -156,7 +157,7 @@
		// Push a new entry onto the history stack.
		history.push('/home')
		history.push("/home");

		// Push a new entry onto the history stack with a query string
		// and some state. Location state does not appear in the URL.
		history.push('/home?the=query', { some: 'state' })
		history.push("/home?the=query", { some: "state" });

		@@ -166,11 +167,11 @@ // If you prefer, use a single location-like object to specify both
		history.push({
		pathname: '/home',
		search: '?the=query',
		state: { some: 'state' }
		})
		pathname: "/home",
		search: "?the=query",
		state: { some: "state" }
		});

		// Go back to the previous history entry. The following
		// two lines are synonymous.
		history.go(-1)
		history.goBack()
		history.go(-1);
		history.goBack();
		```
		@@ -187,3 +188,3 @@
		// user before they navigate away from the current page.
		const unblock = history.block('Are you sure you want to leave this page?')
		const unblock = history.block("Are you sure you want to leave this page?");

		@@ -197,8 +198,7 @@ // Or use a function that returns the message when it's needed.
		// page if there's a form they haven't submitted yet.
		if (input.value !== '')
		return 'Are you sure you want to leave this page?'
		})
		if (input.value !== "") return "Are you sure you want to leave this page?";
		});

		// To stop blocking transitions, call the function returned from block().
		unblock()
		unblock();
		```
		@@ -219,3 +219,3 @@
		}
		})
		});
		```
		@@ -229,10 +229,10 @@
		const history = createHistory({
		basename: '/the/base'
		})
		basename: "/the/base"
		});

		history.listen(location => {
		console.log(location.pathname) // /home
		})
		console.log(location.pathname); // /home
		});

		history.push('/home') // URL is now /the/base/home
		history.push("/home"); // URL is now /the/base/home
		```
		@@ -249,3 +249,3 @@
		forceRefresh: true
		})
		});
		```
		@@ -257,27 +257,32 @@


		```js
		const history = createHashHistory({
		hashType: 'slash' // the default
		})
		hashType: "slash" // the default
		});

		history.push('/home') // window.location.hash is #/home
		history.push("/home"); // window.location.hash is #/home

		const history = createHashHistory({
		hashType: 'noslash' // Omit the leading slash
		})
		hashType: "noslash" // Omit the leading slash
		});

		history.push('/home') // window.location.hash is #home
		history.push("/home"); // window.location.hash is #home

		const history = createHashHistory({
		hashType: 'hashbang' // Google's legacy AJAX URL format
		})
		hashType: "hashbang" // Google's legacy AJAX URL format
		});

		history.push('/home') // window.location.hash is #!/home
		history.push("/home"); // window.location.hash is #!/home
		```

		## About

		`history` is developed and maintained by [React Training](https://reacttraining.com). If
		you're interested in learning more about what React can do for your company, please
		[get in touch](mailto:hello@reacttraining.com)!

		## Thanks

		A big thank-you to [Dan Shaw](https://www.npmjs.com/~dshaw) for letting us use the `history` npm package name! Thanks Dan!
		A big thank-you to [BrowserStack](https://www.browserstack.com/) for providing the infrastructure that allows us to run our build in real browsers.

		Also, thanks to [BrowserStack](https://www.browserstack.com/) for providing the infrastructure that allows us to run our build in real browsers.
		Also, thanks to [Dan Shaw](https://www.npmjs.com/~dshaw) for letting us use the `history` npm package name. Thanks Dan!

2197

umd/history.js

		@@ -1,1478 +0,1059 @@
		(function webpackUniversalModuleDefinition(root, factory) {
		if(typeof exports === 'object' && typeof module === 'object')
		module.exports = factory();
		else if(typeof define === 'function' && define.amd)
		define([], factory);
		else if(typeof exports === 'object')
		exports["History"] = factory();
		else
		root["History"] = factory();
		})(this, function() {
		return /******/ (function(modules) { // webpackBootstrap
		/******/ // The module cache
		/******/ var installedModules = {};
		(function (global, factory) {
		typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
		typeof define === 'function' && define.amd ? define(['exports'], factory) :
		(factory((global.History = {})));
		}(this, (function (exports) { 'use strict';

		/******/ // The require function
		/******/ function __webpack_require__(moduleId) {
		function _extends() {
		_extends = Object.assign \|\| function (target) {
		for (var i = 1; i < arguments.length; i++) {
		var source = arguments[i];

		/******/ // Check if module is in cache
		/******/ if(installedModules[moduleId])
		/******/ return installedModules[moduleId].exports;
		for (var key in source) {
		if (Object.prototype.hasOwnProperty.call(source, key)) {
		target[key] = source[key];
		}
		}
		}

		/******/ // Create a new module (and put it into the cache)
		/******/ var module = installedModules[moduleId] = {
		/******/ exports: {},
		/******/ id: moduleId,
		/******/ loaded: false
		/******/ };
		return target;
		};

		/******/ // Execute the module function
		/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
		return _extends.apply(this, arguments);
		}

		/******/ // Flag the module as loaded
		/******/ module.loaded = true;
		function warning(condition, message) {
		{
		if (condition) {
		return;
		}

		/******/ // Return the exports of the module
		/******/ return module.exports;
		/******/ }
		console.warn(message);
		}
		}

		var prefix = 'Invariant failed';
		function invariant(condition, message) {
		if (condition) {
		return;
		}

		/******/ // expose the modules object (__webpack_modules__)
		/******/ __webpack_require__.m = modules;
		{
		throw new Error(prefix + ": " + (message \|\| ''));
		}
		}

		/******/ // expose the module cache
		/******/ __webpack_require__.c = installedModules;
		function isAbsolute(pathname) {
		return pathname.charAt(0) === '/';
		}

		/******/ // __webpack_public_path__
		/******/ __webpack_require__.p = "";
		// About 1.5x faster than the two-arg version of Array#splice()
		function spliceOne(list, index) {
		for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1) {
		list[i] = list[k];
		}

		/******/ // Load entry module and return exports
		/******/ return __webpack_require__(0);
		/******/ })
		/************************************************************************/
		/******/ ([
		/* 0 */
		/***/ function(module, exports, __webpack_require__) {
		list.pop();
		}

		'use strict';
		// This implementation is based heavily on node's url.parse
		function resolvePathname(to) {
		var from = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';

		exports.__esModule = true;
		exports.createPath = exports.parsePath = exports.locationsAreEqual = exports.createLocation = exports.createMemoryHistory = exports.createHashHistory = exports.createBrowserHistory = undefined;
		var toParts = to && to.split('/') \|\| [];
		var fromParts = from && from.split('/') \|\| [];

		var _LocationUtils = __webpack_require__(1);
		var isToAbs = to && isAbsolute(to);
		var isFromAbs = from && isAbsolute(from);
		var mustEndAbs = isToAbs \|\| isFromAbs;

		Object.defineProperty(exports, 'createLocation', {
		enumerable: true,
		get: function get() {
		return _LocationUtils.createLocation;
		}
		});
		Object.defineProperty(exports, 'locationsAreEqual', {
		enumerable: true,
		get: function get() {
		return _LocationUtils.locationsAreEqual;
		}
		});
		if (to && isAbsolute(to)) {
		// to is absolute
		fromParts = toParts;
		} else if (toParts.length) {
		// to is relative, drop the filename
		fromParts.pop();
		fromParts = fromParts.concat(toParts);
		}

		var _PathUtils = __webpack_require__(4);
		if (!fromParts.length) return '/';

		Object.defineProperty(exports, 'parsePath', {
		enumerable: true,
		get: function get() {
		return _PathUtils.parsePath;
		}
		});
		Object.defineProperty(exports, 'createPath', {
		enumerable: true,
		get: function get() {
		return _PathUtils.createPath;
		}
		});
		var hasTrailingSlash = void 0;
		if (fromParts.length) {
		var last = fromParts[fromParts.length - 1];
		hasTrailingSlash = last === '.' \|\| last === '..' \|\| last === '';
		} else {
		hasTrailingSlash = false;
		}

		var _createBrowserHistory2 = __webpack_require__(5);
		var up = 0;
		for (var i = fromParts.length; i >= 0; i--) {
		var part = fromParts[i];

		var _createBrowserHistory3 = _interopRequireDefault(_createBrowserHistory2);
		if (part === '.') {
		spliceOne(fromParts, i);
		} else if (part === '..') {
		spliceOne(fromParts, i);
		up++;
		} else if (up) {
		spliceOne(fromParts, i);
		up--;
		}
		}

		var _createHashHistory2 = __webpack_require__(10);
		if (!mustEndAbs) for (; up--; up) {
		fromParts.unshift('..');
		}if (mustEndAbs && fromParts[0] !== '' && (!fromParts[0] \|\| !isAbsolute(fromParts[0]))) fromParts.unshift('');

		var _createHashHistory3 = _interopRequireDefault(_createHashHistory2);
		var result = fromParts.join('/');

		var _createMemoryHistory2 = __webpack_require__(11);
		if (hasTrailingSlash && result.substr(-1) !== '/') result += '/';

		var _createMemoryHistory3 = _interopRequireDefault(_createMemoryHistory2);
		return result;
		}

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
		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; };

		exports.createBrowserHistory = _createBrowserHistory3.default;
		exports.createHashHistory = _createHashHistory3.default;
		exports.createMemoryHistory = _createMemoryHistory3.default;
		function valueEqual(a, b) {
		if (a === b) return true;

		/***/ },
		/* 1 */
		/***/ function(module, exports, __webpack_require__) {
		if (a == null \|\| b == null) return false;

		'use strict';
		if (Array.isArray(a)) {
		return Array.isArray(b) && a.length === b.length && a.every(function (item, index) {
		return valueEqual(item, b[index]);
		});
		}

		exports.__esModule = true;
		exports.locationsAreEqual = exports.createLocation = undefined;
		var aType = typeof a === 'undefined' ? 'undefined' : _typeof(a);
		var bType = typeof b === 'undefined' ? 'undefined' : _typeof(b);

		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; };
		if (aType !== bType) return false;

		var _resolvePathname = __webpack_require__(2);
		if (aType === 'object') {
		var aValue = a.valueOf();
		var bValue = b.valueOf();

		var _resolvePathname2 = _interopRequireDefault(_resolvePathname);
		if (aValue !== a \|\| bValue !== b) return valueEqual(aValue, bValue);

		var _valueEqual = __webpack_require__(3);
		var aKeys = Object.keys(a);
		var bKeys = Object.keys(b);

		var _valueEqual2 = _interopRequireDefault(_valueEqual);
		if (aKeys.length !== bKeys.length) return false;

		var _PathUtils = __webpack_require__(4);
		return aKeys.every(function (key) {
		return valueEqual(a[key], b[key]);
		});
		}

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
		return false;
		}

		var createLocation = exports.createLocation = function createLocation(path, state, key, currentLocation) {
		var location = void 0;
		if (typeof path === 'string') {
		// Two-arg form: push(path, state)
		location = (0, _PathUtils.parsePath)(path);
		location.state = state;
		} else {
		// One-arg form: push(location)
		location = _extends({}, path);
		function addLeadingSlash(path) {
		return path.charAt(0) === "/" ? path : "/" + path;
		}
		function stripLeadingSlash(path) {
		return path.charAt(0) === "/" ? path.substr(1) : path;
		}
		function hasBasename(path, prefix) {
		return new RegExp("^" + prefix + "(\\/\|\\?\|#\|$)", "i").test(path);
		}
		function stripBasename(path, prefix) {
		return hasBasename(path, prefix) ? path.substr(prefix.length) : path;
		}
		function stripTrailingSlash(path) {
		return path.charAt(path.length - 1) === "/" ? path.slice(0, -1) : path;
		}
		function parsePath(path) {
		var pathname = path \|\| "/";
		var search = "";
		var hash = "";
		var hashIndex = pathname.indexOf("#");

		if (location.pathname === undefined) location.pathname = '';
		if (hashIndex !== -1) {
		hash = pathname.substr(hashIndex);
		pathname = pathname.substr(0, hashIndex);
		}

		if (location.search) {
		if (location.search.charAt(0) !== '?') location.search = '?' + location.search;
		} else {
		location.search = '';
		}
		var searchIndex = pathname.indexOf("?");

		if (location.hash) {
		if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;
		} else {
		location.hash = '';
		}
		if (searchIndex !== -1) {
		search = pathname.substr(searchIndex);
		pathname = pathname.substr(0, searchIndex);
		}

		if (state !== undefined && location.state === undefined) location.state = state;
		}
		return {
		pathname: pathname,
		search: search === "?" ? "" : search,
		hash: hash === "#" ? "" : hash
		};
		}
		function createPath(location) {
		var pathname = location.pathname,
		search = location.search,
		hash = location.hash;
		var path = pathname \|\| "/";
		if (search && search !== "?") path += search.charAt(0) === "?" ? search : "?" + search;
		if (hash && hash !== "#") path += hash.charAt(0) === "#" ? hash : "#" + hash;
		return path;
		}

		try {
		location.pathname = decodeURI(location.pathname);
		} catch (e) {
		if (e instanceof URIError) {
		throw new URIError('Pathname "' + location.pathname + '" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');
		} else {
		throw e;
		}
		}
		function createLocation(path, state, key, currentLocation) {
		var location;

		if (key) location.key = key;
		if (typeof path === "string") {
		// Two-arg form: push(path, state)
		location = parsePath(path);
		location.state = state;
		} else {
		// One-arg form: push(location)
		location = _extends({}, path);
		if (location.pathname === undefined) location.pathname = "";

		if (currentLocation) {
		// Resolve incomplete/relative pathname relative to current location.
		if (!location.pathname) {
		location.pathname = currentLocation.pathname;
		} else if (location.pathname.charAt(0) !== '/') {
		location.pathname = (0, _resolvePathname2.default)(location.pathname, currentLocation.pathname);
		}
		} else {
		// When there is no prior location and pathname is empty, set it to /
		if (!location.pathname) {
		location.pathname = '/';
		}
		}
		if (location.search) {
		if (location.search.charAt(0) !== "?") location.search = "?" + location.search;
		} else {
		location.search = "";
		}

		return location;
		};
		if (location.hash) {
		if (location.hash.charAt(0) !== "#") location.hash = "#" + location.hash;
		} else {
		location.hash = "";
		}

		var locationsAreEqual = exports.locationsAreEqual = function locationsAreEqual(a, b) {
		return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && (0, _valueEqual2.default)(a.state, b.state);
		};
		if (state !== undefined && location.state === undefined) location.state = state;
		}

		/***/ },
		/* 2 */
		/***/ function(module, exports) {
		try {
		location.pathname = decodeURI(location.pathname);
		} catch (e) {
		if (e instanceof URIError) {
		throw new URIError('Pathname "' + location.pathname + '" could not be decoded. ' + "This is likely caused by an invalid percent-encoding.");
		} else {
		throw e;
		}
		}

		'use strict';
		if (key) location.key = key;

		exports.__esModule = true;
		function isAbsolute(pathname) {
		return pathname.charAt(0) === '/';
		}
		if (currentLocation) {
		// Resolve incomplete/relative pathname relative to current location.
		if (!location.pathname) {
		location.pathname = currentLocation.pathname;
		} else if (location.pathname.charAt(0) !== "/") {
		location.pathname = resolvePathname(location.pathname, currentLocation.pathname);
		}
		} else {
		// When there is no prior location and pathname is empty, set it to /
		if (!location.pathname) {
		location.pathname = "/";
		}
		}

		// About 1.5x faster than the two-arg version of Array#splice()
		function spliceOne(list, index) {
		for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1) {
		list[i] = list[k];
		}
		return location;
		}
		function locationsAreEqual(a, b) {
		return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);
		}

		list.pop();
		}
		function createTransitionManager() {
		var prompt = null;

		// This implementation is based heavily on node's url.parse
		function resolvePathname(to) {
		var from = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
		function setPrompt(nextPrompt) {
		warning(prompt == null, "A history supports only one prompt at a time");
		prompt = nextPrompt;
		return function () {
		if (prompt === nextPrompt) prompt = null;
		};
		}

		var toParts = to && to.split('/') \|\| [];
		var fromParts = from && from.split('/') \|\| [];
		function confirmTransitionTo(location, action, getUserConfirmation, callback) {
		// TODO: If another transition starts while we're still confirming
		// the previous one, we may end up in a weird state. Figure out the
		// best way to handle this.
		if (prompt != null) {
		var result = typeof prompt === "function" ? prompt(location, action) : prompt;

		var isToAbs = to && isAbsolute(to);
		var isFromAbs = from && isAbsolute(from);
		var mustEndAbs = isToAbs \|\| isFromAbs;
		if (typeof result === "string") {
		if (typeof getUserConfirmation === "function") {
		getUserConfirmation(result, callback);
		} else {
		warning(false, "A history needs a getUserConfirmation function in order to use a prompt message");
		callback(true);
		}
		} else {
		// Return false from a transition hook to cancel the transition.
		callback(result !== false);
		}
		} else {
		callback(true);
		}
		}

		if (to && isAbsolute(to)) {
		// to is absolute
		fromParts = toParts;
		} else if (toParts.length) {
		// to is relative, drop the filename
		fromParts.pop();
		fromParts = fromParts.concat(toParts);
		}
		var listeners = [];

		if (!fromParts.length) return '/';
		function appendListener(fn) {
		var isActive = true;

		var hasTrailingSlash = void 0;
		if (fromParts.length) {
		var last = fromParts[fromParts.length - 1];
		hasTrailingSlash = last === '.' \|\| last === '..' \|\| last === '';
		} else {
		hasTrailingSlash = false;
		}
		function listener() {
		if (isActive) fn.apply(void 0, arguments);
		}

		var up = 0;
		for (var i = fromParts.length; i >= 0; i--) {
		var part = fromParts[i];
		listeners.push(listener);
		return function () {
		isActive = false;
		listeners = listeners.filter(function (item) {
		return item !== listener;
		});
		};
		}

		if (part === '.') {
		spliceOne(fromParts, i);
		} else if (part === '..') {
		spliceOne(fromParts, i);
		up++;
		} else if (up) {
		spliceOne(fromParts, i);
		up--;
		}
		}
		function notifyListeners() {
		for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
		args[_key] = arguments[_key];
		}

		if (!mustEndAbs) for (; up--; up) {
		fromParts.unshift('..');
		}if (mustEndAbs && fromParts[0] !== '' && (!fromParts[0] \|\| !isAbsolute(fromParts[0]))) fromParts.unshift('');
		listeners.forEach(function (listener) {
		return listener.apply(void 0, args);
		});
		}

		var result = fromParts.join('/');
		return {
		setPrompt: setPrompt,
		confirmTransitionTo: confirmTransitionTo,
		appendListener: appendListener,
		notifyListeners: notifyListeners
		};
		}

		if (hasTrailingSlash && result.substr(-1) !== '/') result += '/';
		var canUseDOM = !!(typeof window !== "undefined" && window.document && window.document.createElement);
		function getConfirmation(message, callback) {
		callback(window.confirm(message)); // eslint-disable-line no-alert
		}
		/**
		* Returns true if the HTML5 history API is supported. Taken from Modernizr.
		*
		* https://github.com/Modernizr/Modernizr/blob/master/LICENSE
		* https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
		* changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586
		*/

		return result;
		}
		function supportsHistory() {
		var ua = window.navigator.userAgent;
		if ((ua.indexOf("Android 2.") !== -1 \|\| ua.indexOf("Android 4.0") !== -1) && ua.indexOf("Mobile Safari") !== -1 && ua.indexOf("Chrome") === -1 && ua.indexOf("Windows Phone") === -1) return false;
		return window.history && "pushState" in window.history;
		}
		/**
		* Returns true if browser fires popstate on hash change.
		* IE10 and IE11 do not.
		*/

		exports.default = resolvePathname;
		module.exports = exports['default'];
		function supportsPopStateOnHashChange() {
		return window.navigator.userAgent.indexOf("Trident") === -1;
		}
		/**
		* Returns false if using go(n) with hash history causes a full page reload.
		*/

		/***/ },
		/* 3 */
		/***/ function(module, exports) {
		function supportsGoWithoutReloadUsingHash() {
		return window.navigator.userAgent.indexOf("Firefox") === -1;
		}
		/**
		* Returns true if a given popstate event is an extraneous WebKit event.
		* Accounts for the fact that Chrome on iOS fires real popstate events
		* containing undefined state when pressing the back button.
		*/

		'use strict';
		function isExtraneousPopstateEvent(event) {
		event.state === undefined && navigator.userAgent.indexOf("CriOS") === -1;
		}

		exports.__esModule = true;
		var PopStateEvent = "popstate";
		var HashChangeEvent = "hashchange";

		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; };
		function getHistoryState() {
		try {
		return window.history.state \|\| {};
		} catch (e) {
		// IE 11 sometimes throws when accessing window.history.state
		// See https://github.com/ReactTraining/history/pull/289
		return {};
		}
		}
		/**
		* Creates a history object that uses the HTML5 history API including
		* pushState, replaceState, and the popstate event.
		*/

		function valueEqual(a, b) {
		if (a === b) return true;

		if (a == null \|\| b == null) return false;
		function createBrowserHistory(props) {
		if (props === void 0) {
		props = {};
		}

		if (Array.isArray(a)) {
		return Array.isArray(b) && a.length === b.length && a.every(function (item, index) {
		return valueEqual(item, b[index]);
		});
		}
		!canUseDOM ? invariant(false, "Browser history needs a DOM") : void 0;
		var globalHistory = window.history;
		var canUseHistory = supportsHistory();
		var needsHashChangeListener = !supportsPopStateOnHashChange();
		var _props = props,
		_props$forceRefresh = _props.forceRefresh,
		forceRefresh = _props$forceRefresh === void 0 ? false : _props$forceRefresh,
		_props$getUserConfirm = _props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,
		_props$keyLength = _props.keyLength,
		keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;
		var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : "";

		var aType = typeof a === 'undefined' ? 'undefined' : _typeof(a);
		var bType = typeof b === 'undefined' ? 'undefined' : _typeof(b);
		function getDOMLocation(historyState) {
		var _ref = historyState \|\| {},
		key = _ref.key,
		state = _ref.state;

		if (aType !== bType) return false;
		var _window$location = window.location,
		pathname = _window$location.pathname,
		search = _window$location.search,
		hash = _window$location.hash;
		var path = pathname + search + hash;
		warning(!basename \|\| hasBasename(path, basename), "You are attempting to use a basename on a page whose URL path does not begin " + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');
		if (basename) path = stripBasename(path, basename);
		return createLocation(path, state, key);
		}

		if (aType === 'object') {
		var aValue = a.valueOf();
		var bValue = b.valueOf();
		function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		}

		if (aValue !== a \|\| bValue !== b) return valueEqual(aValue, bValue);
		var transitionManager = createTransitionManager();

		var aKeys = Object.keys(a);
		var bKeys = Object.keys(b);
		function setState(nextState) {
		_extends(history, nextState);

		if (aKeys.length !== bKeys.length) return false;
		history.length = globalHistory.length;
		transitionManager.notifyListeners(history.location, history.action);
		}

		return aKeys.every(function (key) {
		return valueEqual(a[key], b[key]);
		});
		}
		function handlePopState(event) {
		// Ignore extraneous popstate events in WebKit.
		if (isExtraneousPopstateEvent(event)) return;
		handlePop(getDOMLocation(event.state));
		}

		return false;
		}
		function handleHashChange() {
		handlePop(getDOMLocation(getHistoryState()));
		}

		exports.default = valueEqual;
		module.exports = exports['default'];
		var forceNextPop = false;

		/***/ },
		/* 4 */
		/***/ function(module, exports) {
		function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = "POP";
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location
		});
		} else {
		revertPop(location);
		}
		});
		}
		}

		'use strict';
		function revertPop(fromLocation) {
		var toLocation = history.location; // TODO: We could probably make this more reliable by
		// keeping a list of keys we've seen in sessionStorage.
		// Instead, we just default to 0 for keys we don't know.

		exports.__esModule = true;
		var addLeadingSlash = exports.addLeadingSlash = function addLeadingSlash(path) {
		return path.charAt(0) === '/' ? path : '/' + path;
		};
		var toIndex = allKeys.indexOf(toLocation.key);
		if (toIndex === -1) toIndex = 0;
		var fromIndex = allKeys.indexOf(fromLocation.key);
		if (fromIndex === -1) fromIndex = 0;
		var delta = toIndex - fromIndex;

		var stripLeadingSlash = exports.stripLeadingSlash = function stripLeadingSlash(path) {
		return path.charAt(0) === '/' ? path.substr(1) : path;
		};
		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		}

		var hasBasename = exports.hasBasename = function hasBasename(path, prefix) {
		return new RegExp('^' + prefix + '(\\/\|\\?\|#\|$)', 'i').test(path);
		};
		var initialLocation = getDOMLocation(getHistoryState());
		var allKeys = [initialLocation.key]; // Public interface

		var stripBasename = exports.stripBasename = function stripBasename(path, prefix) {
		return hasBasename(path, prefix) ? path.substr(prefix.length) : path;
		};
		function createHref(location) {
		return basename + createPath(location);
		}

		var stripTrailingSlash = exports.stripTrailingSlash = function stripTrailingSlash(path) {
		return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;
		};
		function push(path, state) {
		warning(!(typeof path === "object" && path.state !== undefined && state !== undefined), "You should avoid providing a 2nd state argument to push when the 1st " + "argument is a location-like object that already has state; it is ignored");
		var action = "PUSH";
		var location = createLocation(path, state, createKey(), history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var href = createHref(location);
		var key = location.key,
		state = location.state;

		var parsePath = exports.parsePath = function parsePath(path) {
		var pathname = path \|\| '/';
		var search = '';
		var hash = '';
		if (canUseHistory) {
		globalHistory.pushState({
		key: key,
		state: state
		}, null, href);

		var hashIndex = pathname.indexOf('#');
		if (hashIndex !== -1) {
		hash = pathname.substr(hashIndex);
		pathname = pathname.substr(0, hashIndex);
		}
		if (forceRefresh) {
		window.location.href = href;
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		var nextKeys = allKeys.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);
		nextKeys.push(location.key);
		allKeys = nextKeys;
		setState({
		action: action,
		location: location
		});
		}
		} else {
		warning(state === undefined, "Browser history cannot push state in browsers that do not support HTML5 history");
		window.location.href = href;
		}
		});
		}

		var searchIndex = pathname.indexOf('?');
		if (searchIndex !== -1) {
		search = pathname.substr(searchIndex);
		pathname = pathname.substr(0, searchIndex);
		}
		function replace(path, state) {
		warning(!(typeof path === "object" && path.state !== undefined && state !== undefined), "You should avoid providing a 2nd state argument to replace when the 1st " + "argument is a location-like object that already has state; it is ignored");
		var action = "REPLACE";
		var location = createLocation(path, state, createKey(), history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var href = createHref(location);
		var key = location.key,
		state = location.state;

		return {
		pathname: pathname,
		search: search === '?' ? '' : search,
		hash: hash === '#' ? '' : hash
		};
		};
		if (canUseHistory) {
		globalHistory.replaceState({
		key: key,
		state: state
		}, null, href);

		var createPath = exports.createPath = function createPath(location) {
		var pathname = location.pathname,
		search = location.search,
		hash = location.hash;
		if (forceRefresh) {
		window.location.replace(href);
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		if (prevIndex !== -1) allKeys[prevIndex] = location.key;
		setState({
		action: action,
		location: location
		});
		}
		} else {
		warning(state === undefined, "Browser history cannot replace state in browsers that do not support HTML5 history");
		window.location.replace(href);
		}
		});
		}

		function go(n) {
		globalHistory.go(n);
		}

		var path = pathname \|\| '/';
		function goBack() {
		go(-1);
		}

		if (search && search !== '?') path += search.charAt(0) === '?' ? search : '?' + search;
		function goForward() {
		go(1);
		}

		if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : '#' + hash;
		var listenerCount = 0;

		return path;
		};
		function checkDOMListeners(delta) {
		listenerCount += delta;

		/***/ },
		/* 5 */
		/***/ function(module, exports, __webpack_require__) {
		if (listenerCount === 1) {
		window.addEventListener(PopStateEvent, handlePopState);
		if (needsHashChangeListener) window.addEventListener(HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		window.removeEventListener(PopStateEvent, handlePopState);
		if (needsHashChangeListener) window.removeEventListener(HashChangeEvent, handleHashChange);
		}
		}

		'use strict';
		var isBlocked = false;

		exports.__esModule = true;
		function block(prompt) {
		if (prompt === void 0) {
		prompt = false;
		}

		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 unblock = transitionManager.setPrompt(prompt);

		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; };
		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		var _warning = __webpack_require__(6);
		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		var _warning2 = _interopRequireDefault(_warning);
		return unblock();
		};
		}

		var _invariant = __webpack_require__(7);
		function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);
		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		}

		var _invariant2 = _interopRequireDefault(_invariant);
		var history = {
		length: globalHistory.length,
		action: "POP",
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};
		return history;
		}

		var _LocationUtils = __webpack_require__(1);
		var HashChangeEvent$1 = "hashchange";
		var HashPathCoders = {
		hashbang: {
		encodePath: function encodePath(path) {
		return path.charAt(0) === "!" ? path : "!/" + stripLeadingSlash(path);
		},
		decodePath: function decodePath(path) {
		return path.charAt(0) === "!" ? path.substr(1) : path;
		}
		},
		noslash: {
		encodePath: stripLeadingSlash,
		decodePath: addLeadingSlash
		},
		slash: {
		encodePath: addLeadingSlash,
		decodePath: addLeadingSlash
		}
		};

		var _PathUtils = __webpack_require__(4);
		function getHashPath() {
		// We can't use window.location.hash here because it's not
		// consistent across browsers - Firefox will pre-decode it!
		var href = window.location.href;
		var hashIndex = href.indexOf("#");
		return hashIndex === -1 ? "" : href.substring(hashIndex + 1);
		}

		var _createTransitionManager = __webpack_require__(8);
		function pushHashPath(path) {
		window.location.hash = path;
		}

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);
		function replaceHashPath(path) {
		var hashIndex = window.location.href.indexOf("#");
		window.location.replace(window.location.href.slice(0, hashIndex >= 0 ? hashIndex : 0) + "#" + path);
		}

		var _DOMUtils = __webpack_require__(9);
		function createHashHistory(props) {
		if (props === void 0) {
		props = {};
		}

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
		!canUseDOM ? invariant(false, "Hash history needs a DOM") : void 0;
		var globalHistory = window.history;
		var canGoWithoutReload = supportsGoWithoutReloadUsingHash();
		var _props = props,
		_props$getUserConfirm = _props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,
		_props$hashType = _props.hashType,
		hashType = _props$hashType === void 0 ? "slash" : _props$hashType;
		var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : "";
		var _HashPathCoders$hashT = HashPathCoders[hashType],
		encodePath = _HashPathCoders$hashT.encodePath,
		decodePath = _HashPathCoders$hashT.decodePath;

		var PopStateEvent = 'popstate';
		var HashChangeEvent = 'hashchange';
		function getDOMLocation() {
		var path = decodePath(getHashPath());
		warning(!basename \|\| hasBasename(path, basename), "You are attempting to use a basename on a page whose URL path does not begin " + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".');
		if (basename) path = stripBasename(path, basename);
		return createLocation(path);
		}

		var getHistoryState = function getHistoryState() {
		try {
		return window.history.state \|\| {};
		} catch (e) {
		// IE 11 sometimes throws when accessing window.history.state
		// See https://github.com/ReactTraining/history/pull/289
		return {};
		}
		};
		var transitionManager = createTransitionManager();

		/**
		* Creates a history object that uses the HTML5 history API including
		* pushState, replaceState, and the popstate event.
		*/
		var createBrowserHistory = function createBrowserHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
		function setState(nextState) {
		_extends(history, nextState);

		!_DOMUtils.canUseDOM ? false ? (0, _invariant2.default)(false, 'Browser history needs a DOM') : (0, _invariant2.default)(false) : void 0;
		history.length = globalHistory.length;
		transitionManager.notifyListeners(history.location, history.action);
		}

		var globalHistory = window.history;
		var canUseHistory = (0, _DOMUtils.supportsHistory)();
		var needsHashChangeListener = !(0, _DOMUtils.supportsPopStateOnHashChange)();
		var forceNextPop = false;
		var ignorePath = null;

		var _props$forceRefresh = props.forceRefresh,
		forceRefresh = _props$forceRefresh === undefined ? false : _props$forceRefresh,
		_props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? _DOMUtils.getConfirmation : _props$getUserConfirm,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;
		function handleHashChange() {
		var path = getHashPath();
		var encodedPath = encodePath(path);

		var basename = props.basename ? (0, _PathUtils.stripTrailingSlash)((0, _PathUtils.addLeadingSlash)(props.basename)) : '';
		if (path !== encodedPath) {
		// Ensure we always have a properly-encoded hash.
		replaceHashPath(encodedPath);
		} else {
		var location = getDOMLocation();
		var prevLocation = history.location;
		if (!forceNextPop && locationsAreEqual(prevLocation, location)) return; // A hashchange doesn't always == location change.

		var getDOMLocation = function getDOMLocation(historyState) {
		var _ref = historyState \|\| {},
		key = _ref.key,
		state = _ref.state;
		if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.

		var _window$location = window.location,
		pathname = _window$location.pathname,
		search = _window$location.search,
		hash = _window$location.hash;
		ignorePath = null;
		handlePop(location);
		}
		}

		function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = "POP";
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location
		});
		} else {
		revertPop(location);
		}
		});
		}
		}

		var path = pathname + search + hash;
		function revertPop(fromLocation) {
		var toLocation = history.location; // TODO: We could probably make this more reliable by
		// keeping a list of paths we've seen in sessionStorage.
		// Instead, we just default to 0 for paths we don't know.

		false ? (0, _warning2.default)(!basename \|\| (0, _PathUtils.hasBasename)(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".') : void 0;
		var toIndex = allPaths.lastIndexOf(createPath(toLocation));
		if (toIndex === -1) toIndex = 0;
		var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));
		if (fromIndex === -1) fromIndex = 0;
		var delta = toIndex - fromIndex;

		if (basename) path = (0, _PathUtils.stripBasename)(path, basename);
		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		} // Ensure the hash is encoded properly before doing anything else.

		return (0, _LocationUtils.createLocation)(path, state, key);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};
		var path = getHashPath();
		var encodedPath = encodePath(path);
		if (path !== encodedPath) replaceHashPath(encodedPath);
		var initialLocation = getDOMLocation();
		var allPaths = [createPath(initialLocation)]; // Public interface

		var transitionManager = (0, _createTransitionManager2.default)();
		function createHref(location) {
		return "#" + encodePath(basename + createPath(location));
		}

		var setState = function setState(nextState) {
		_extends(history, nextState);
		function push(path, state) {
		warning(state === undefined, "Hash history cannot push state; it is ignored");
		var action = "PUSH";
		var location = createLocation(path, undefined, undefined, history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var path = createPath(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		history.length = globalHistory.length;
		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a PUSH, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		pushHashPath(encodedPath);
		var prevIndex = allPaths.lastIndexOf(createPath(history.location));
		var nextPaths = allPaths.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);
		nextPaths.push(path);
		allPaths = nextPaths;
		setState({
		action: action,
		location: location
		});
		} else {
		warning(false, "Hash history cannot PUSH the same path; a new entry will not be added to the history stack");
		setState();
		}
		});
		}

		transitionManager.notifyListeners(history.location, history.action);
		};
		function replace(path, state) {
		warning(state === undefined, "Hash history cannot replace state; it is ignored");
		var action = "REPLACE";
		var location = createLocation(path, undefined, undefined, history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var path = createPath(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		var handlePopState = function handlePopState(event) {
		// Ignore extraneous popstate events in WebKit.
		if ((0, _DOMUtils.isExtraneousPopstateEvent)(event)) return;
		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a REPLACE, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		replaceHashPath(encodedPath);
		}

		handlePop(getDOMLocation(event.state));
		};
		var prevIndex = allPaths.indexOf(createPath(history.location));
		if (prevIndex !== -1) allPaths[prevIndex] = path;
		setState({
		action: action,
		location: location
		});
		});
		}

		var handleHashChange = function handleHashChange() {
		handlePop(getDOMLocation(getHistoryState()));
		};
		function go(n) {
		warning(canGoWithoutReload, "Hash history go(n) causes a full page reload in this browser");
		globalHistory.go(n);
		}

		var forceNextPop = false;
		function goBack() {
		go(-1);
		}

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';
		function goForward() {
		go(1);
		}

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};
		var listenerCount = 0;

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;
		function checkDOMListeners(delta) {
		listenerCount += delta;

		// TODO: We could probably make this more reliable by
		// keeping a list of keys we've seen in sessionStorage.
		// Instead, we just default to 0 for keys we don't know.
		if (listenerCount === 1) {
		window.addEventListener(HashChangeEvent$1, handleHashChange);
		} else if (listenerCount === 0) {
		window.removeEventListener(HashChangeEvent$1, handleHashChange);
		}
		}

		var toIndex = allKeys.indexOf(toLocation.key);
		var isBlocked = false;

		if (toIndex === -1) toIndex = 0;
		function block(prompt) {
		if (prompt === void 0) {
		prompt = false;
		}

		var fromIndex = allKeys.indexOf(fromLocation.key);
		var unblock = transitionManager.setPrompt(prompt);

		if (fromIndex === -1) fromIndex = 0;
		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		var delta = toIndex - fromIndex;
		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};
		return unblock();
		};
		}

		var initialLocation = getDOMLocation(getHistoryState());
		var allKeys = [initialLocation.key];
		function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);
		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		}

		// Public interface
		var history = {
		length: globalHistory.length,
		action: "POP",
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};
		return history;
		}

		var createHref = function createHref(location) {
		return basename + (0, _PathUtils.createPath)(location);
		};
		function clamp(n, lowerBound, upperBound) {
		return Math.min(Math.max(n, lowerBound), upperBound);
		}
		/**
		* Creates a history object that stores locations in memory.
		*/

		var push = function push(path, state) {
		false ? (0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);
		function createMemoryHistory(props) {
		if (props === void 0) {
		props = {};
		}

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var _props = props,
		getUserConfirmation = _props.getUserConfirmation,
		_props$initialEntries = _props.initialEntries,
		initialEntries = _props$initialEntries === void 0 ? ["/"] : _props$initialEntries,
		_props$initialIndex = _props.initialIndex,
		initialIndex = _props$initialIndex === void 0 ? 0 : _props$initialIndex,
		_props$keyLength = _props.keyLength,
		keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;
		var transitionManager = createTransitionManager();

		var href = createHref(location);
		var key = location.key,
		state = location.state;
		function setState(nextState) {
		_extends(history, nextState);

		history.length = history.entries.length;
		transitionManager.notifyListeners(history.location, history.action);
		}

		if (canUseHistory) {
		globalHistory.pushState({ key: key, state: state }, null, href);
		function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		}

		if (forceRefresh) {
		window.location.href = href;
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		var nextKeys = allKeys.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);
		var index = clamp(initialIndex, 0, initialEntries.length - 1);
		var entries = initialEntries.map(function (entry) {
		return typeof entry === "string" ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key \|\| createKey());
		}); // Public interface

		nextKeys.push(location.key);
		allKeys = nextKeys;
		var createHref = createPath;

		setState({ action: action, location: location });
		}
		} else {
		false ? (0, _warning2.default)(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history') : void 0;
		function push(path, state) {
		warning(!(typeof path === "object" && path.state !== undefined && state !== undefined), "You should avoid providing a 2nd state argument to push when the 1st " + "argument is a location-like object that already has state; it is ignored");
		var action = "PUSH";
		var location = createLocation(path, state, createKey(), history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		var prevIndex = history.index;
		var nextIndex = prevIndex + 1;
		var nextEntries = history.entries.slice(0);

		window.location.href = href;
		}
		});
		};
		if (nextEntries.length > nextIndex) {
		nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);
		} else {
		nextEntries.push(location);
		}

		var replace = function replace(path, state) {
		false ? (0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;
		setState({
		action: action,
		location: location,
		index: nextIndex,
		entries: nextEntries
		});
		});
		}

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);
		function replace(path, state) {
		warning(!(typeof path === "object" && path.state !== undefined && state !== undefined), "You should avoid providing a 2nd state argument to replace when the 1st " + "argument is a location-like object that already has state; it is ignored");
		var action = "REPLACE";
		var location = createLocation(path, state, createKey(), history.location);
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		history.entries[history.index] = location;
		setState({
		action: action,
		location: location
		});
		});
		}

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;
		function go(n) {
		var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);
		var action = "POP";
		var location = history.entries[nextIndex];
		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location,
		index: nextIndex
		});
		} else {
		// Mimic the behavior of DOM histories by
		// causing a render after a cancelled POP.
		setState();
		}
		});
		}

		var href = createHref(location);
		var key = location.key,
		state = location.state;
		function goBack() {
		go(-1);
		}

		function goForward() {
		go(1);
		}

		if (canUseHistory) {
		globalHistory.replaceState({ key: key, state: state }, null, href);
		function canGo(n) {
		var nextIndex = history.index + n;
		return nextIndex >= 0 && nextIndex < history.entries.length;
		}

		if (forceRefresh) {
		window.location.replace(href);
		} else {
		var prevIndex = allKeys.indexOf(history.location.key);
		function block(prompt) {
		if (prompt === void 0) {
		prompt = false;
		}

		if (prevIndex !== -1) allKeys[prevIndex] = location.key;
		return transitionManager.setPrompt(prompt);
		}

		setState({ action: action, location: location });
		}
		} else {
		false ? (0, _warning2.default)(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history') : void 0;
		function listen(listener) {
		return transitionManager.appendListener(listener);
		}

		window.location.replace(href);
		}
		});
		};
		var history = {
		length: entries.length,
		action: "POP",
		location: entries[index],
		index: index,
		entries: entries,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		canGo: canGo,
		block: block,
		listen: listen
		};
		return history;
		}

		var go = function go(n) {
		globalHistory.go(n);
		};
		exports.createBrowserHistory = createBrowserHistory;
		exports.createHashHistory = createHashHistory;
		exports.createMemoryHistory = createMemoryHistory;
		exports.createLocation = createLocation;
		exports.locationsAreEqual = locationsAreEqual;
		exports.parsePath = parsePath;
		exports.createPath = createPath;

		var goBack = function goBack() {
		return go(-1);
		};
		Object.defineProperty(exports, '__esModule', { value: true });

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		(0, _DOMUtils.addEventListener)(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) (0, _DOMUtils.addEventListener)(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		(0, _DOMUtils.removeEventListener)(window, PopStateEvent, handlePopState);

		if (needsHashChangeListener) (0, _DOMUtils.removeEventListener)(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createBrowserHistory;

		/***/ },
		/* 6 */
		/***/ function(module, exports, __webpack_require__) {

		/**
		* Copyright 2014-2015, Facebook, Inc.
		* All rights reserved.
		*
		* This source code is licensed under the BSD-style license found in the
		* LICENSE file in the root directory of this source tree. An additional grant
		* of patent rights can be found in the PATENTS file in the same directory.
		*/

		'use strict';

		/**
		* Similar to invariant but only logs a warning if the condition is not met.
		* This can be used to log issues in development environments in critical
		* paths. Removing the logging code for production environments will keep the
		* same logic and follow the same code paths.
		*/

		var warning = function() {};

		if (false) {
		warning = function(condition, format, args) {
		var len = arguments.length;
		args = new Array(len > 2 ? len - 2 : 0);
		for (var key = 2; key < len; key++) {
		args[key - 2] = arguments[key];
		}
		if (format === undefined) {
		throw new Error(
		'`warning(condition, format, ...args)` requires a warning ' +
		'message argument'
		);
		}

		if (format.length < 10 \|\| (/^[s\W]*$/).test(format)) {
		throw new Error(
		'The warning format should be able to uniquely identify this ' +
		'warning. Please, use a more descriptive format than: ' + format
		);
		}

		if (!condition) {
		var argIndex = 0;
		var message = 'Warning: ' +
		format.replace(/%s/g, function() {
		return args[argIndex++];
		});
		if (typeof console !== 'undefined') {
		console.error(message);
		}
		try {
		// This error was thrown as a convenience so that you can use this stack
		// to find the callsite that caused this warning to fire.
		throw new Error(message);
		} catch(x) {}
		}
		};
		}

		module.exports = warning;


		/***/ },
		/* 7 */
		/***/ function(module, exports, __webpack_require__) {

		/**
		* Copyright 2013-2015, Facebook, Inc.
		* All rights reserved.
		*
		* This source code is licensed under the BSD-style license found in the
		* LICENSE file in the root directory of this source tree. An additional grant
		* of patent rights can be found in the PATENTS file in the same directory.
		*/

		'use strict';

		/**
		* Use invariant() to assert state which your program assumes to be true.
		*
		* Provide sprintf-style format (only %s is supported) and arguments
		* to provide information about what broke and what you were
		* expecting.
		*
		* The invariant message will be stripped in production, but the invariant
		* will remain to ensure logic does not differ in production.
		*/

		var invariant = function(condition, format, a, b, c, d, e, f) {
		if (false) {
		if (format === undefined) {
		throw new Error('invariant requires an error message argument');
		}
		}

		if (!condition) {
		var error;
		if (format === undefined) {
		error = new Error(
		'Minified exception occurred; use the non-minified dev environment ' +
		'for the full error message and additional helpful warnings.'
		);
		} else {
		var args = [a, b, c, d, e, f];
		var argIndex = 0;
		error = new Error(
		format.replace(/%s/g, function() { return args[argIndex++]; })
		);
		error.name = 'Invariant Violation';
		}

		error.framesToPop = 1; // we don't care about invariant's own frame
		throw error;
		}
		};

		module.exports = invariant;


		/***/ },
		/* 8 */
		/***/ function(module, exports, __webpack_require__) {

		'use strict';

		exports.__esModule = true;

		var _warning = __webpack_require__(6);

		var _warning2 = _interopRequireDefault(_warning);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var createTransitionManager = function createTransitionManager() {
		var prompt = null;

		var setPrompt = function setPrompt(nextPrompt) {
		false ? (0, _warning2.default)(prompt == null, 'A history supports only one prompt at a time') : void 0;

		prompt = nextPrompt;

		return function () {
		if (prompt === nextPrompt) prompt = null;
		};
		};

		var confirmTransitionTo = function confirmTransitionTo(location, action, getUserConfirmation, callback) {
		// TODO: If another transition starts while we're still confirming
		// the previous one, we may end up in a weird state. Figure out the
		// best way to handle this.
		if (prompt != null) {
		var result = typeof prompt === 'function' ? prompt(location, action) : prompt;

		if (typeof result === 'string') {
		if (typeof getUserConfirmation === 'function') {
		getUserConfirmation(result, callback);
		} else {
		false ? (0, _warning2.default)(false, 'A history needs a getUserConfirmation function in order to use a prompt message') : void 0;

		callback(true);
		}
		} else {
		// Return false from a transition hook to cancel the transition.
		callback(result !== false);
		}
		} else {
		callback(true);
		}
		};

		var listeners = [];

		var appendListener = function appendListener(fn) {
		var isActive = true;

		var listener = function listener() {
		if (isActive) fn.apply(undefined, arguments);
		};

		listeners.push(listener);

		return function () {
		isActive = false;
		listeners = listeners.filter(function (item) {
		return item !== listener;
		});
		};
		};

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

		listeners.forEach(function (listener) {
		return listener.apply(undefined, args);
		});
		};

		return {
		setPrompt: setPrompt,
		confirmTransitionTo: confirmTransitionTo,
		appendListener: appendListener,
		notifyListeners: notifyListeners
		};
		};

		exports.default = createTransitionManager;

		/***/ },
		/* 9 */
		/***/ function(module, exports) {

		'use strict';

		exports.__esModule = true;
		var canUseDOM = exports.canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);

		var addEventListener = exports.addEventListener = function addEventListener(node, event, listener) {
		return node.addEventListener ? node.addEventListener(event, listener, false) : node.attachEvent('on' + event, listener);
		};

		var removeEventListener = exports.removeEventListener = function removeEventListener(node, event, listener) {
		return node.removeEventListener ? node.removeEventListener(event, listener, false) : node.detachEvent('on' + event, listener);
		};

		var getConfirmation = exports.getConfirmation = function getConfirmation(message, callback) {
		return callback(window.confirm(message));
		}; // eslint-disable-line no-alert

		/**
		* Returns true if the HTML5 history API is supported. Taken from Modernizr.
		*
		* https://github.com/Modernizr/Modernizr/blob/master/LICENSE
		* https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
		* changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586
		*/
		var supportsHistory = exports.supportsHistory = function supportsHistory() {
		var ua = window.navigator.userAgent;

		if ((ua.indexOf('Android 2.') !== -1 \|\| ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) return false;

		return window.history && 'pushState' in window.history;
		};

		/**
		* Returns true if browser fires popstate on hash change.
		* IE10 and IE11 do not.
		*/
		var supportsPopStateOnHashChange = exports.supportsPopStateOnHashChange = function supportsPopStateOnHashChange() {
		return window.navigator.userAgent.indexOf('Trident') === -1;
		};

		/**
		* Returns false if using go(n) with hash history causes a full page reload.
		*/
		var supportsGoWithoutReloadUsingHash = exports.supportsGoWithoutReloadUsingHash = function supportsGoWithoutReloadUsingHash() {
		return window.navigator.userAgent.indexOf('Firefox') === -1;
		};

		/**
		* Returns true if a given popstate event is an extraneous WebKit event.
		* Accounts for the fact that Chrome on iOS fires real popstate events
		* containing undefined state when pressing the back button.
		*/
		var isExtraneousPopstateEvent = exports.isExtraneousPopstateEvent = function isExtraneousPopstateEvent(event) {
		return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;
		};

		/***/ },
		/* 10 */
		/***/ function(module, exports, __webpack_require__) {

		'use strict';

		exports.__esModule = true;

		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 _warning = __webpack_require__(6);

		var _warning2 = _interopRequireDefault(_warning);

		var _invariant = __webpack_require__(7);

		var _invariant2 = _interopRequireDefault(_invariant);

		var _LocationUtils = __webpack_require__(1);

		var _PathUtils = __webpack_require__(4);

		var _createTransitionManager = __webpack_require__(8);

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);

		var _DOMUtils = __webpack_require__(9);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var HashChangeEvent = 'hashchange';

		var HashPathCoders = {
		hashbang: {
		encodePath: function encodePath(path) {
		return path.charAt(0) === '!' ? path : '!/' + (0, _PathUtils.stripLeadingSlash)(path);
		},
		decodePath: function decodePath(path) {
		return path.charAt(0) === '!' ? path.substr(1) : path;
		}
		},
		noslash: {
		encodePath: _PathUtils.stripLeadingSlash,
		decodePath: _PathUtils.addLeadingSlash
		},
		slash: {
		encodePath: _PathUtils.addLeadingSlash,
		decodePath: _PathUtils.addLeadingSlash
		}
		};

		var getHashPath = function getHashPath() {
		// We can't use window.location.hash here because it's not
		// consistent across browsers - Firefox will pre-decode it!
		var href = window.location.href;
		var hashIndex = href.indexOf('#');
		return hashIndex === -1 ? '' : href.substring(hashIndex + 1);
		};

		var pushHashPath = function pushHashPath(path) {
		return window.location.hash = path;
		};

		var replaceHashPath = function replaceHashPath(path) {
		var hashIndex = window.location.href.indexOf('#');

		window.location.replace(window.location.href.slice(0, hashIndex >= 0 ? hashIndex : 0) + '#' + path);
		};

		var createHashHistory = function createHashHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

		!_DOMUtils.canUseDOM ? false ? (0, _invariant2.default)(false, 'Hash history needs a DOM') : (0, _invariant2.default)(false) : void 0;

		var globalHistory = window.history;
		var canGoWithoutReload = (0, _DOMUtils.supportsGoWithoutReloadUsingHash)();

		var _props$getUserConfirm = props.getUserConfirmation,
		getUserConfirmation = _props$getUserConfirm === undefined ? _DOMUtils.getConfirmation : _props$getUserConfirm,
		_props$hashType = props.hashType,
		hashType = _props$hashType === undefined ? 'slash' : _props$hashType;

		var basename = props.basename ? (0, _PathUtils.stripTrailingSlash)((0, _PathUtils.addLeadingSlash)(props.basename)) : '';

		var _HashPathCoders$hashT = HashPathCoders[hashType],
		encodePath = _HashPathCoders$hashT.encodePath,
		decodePath = _HashPathCoders$hashT.decodePath;


		var getDOMLocation = function getDOMLocation() {
		var path = decodePath(getHashPath());

		false ? (0, _warning2.default)(!basename \|\| (0, _PathUtils.hasBasename)(path, basename), 'You are attempting to use a basename on a page whose URL path does not begin ' + 'with the basename. Expected path "' + path + '" to begin with "' + basename + '".') : void 0;

		if (basename) path = (0, _PathUtils.stripBasename)(path, basename);

		return (0, _LocationUtils.createLocation)(path);
		};

		var transitionManager = (0, _createTransitionManager2.default)();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = globalHistory.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var forceNextPop = false;
		var ignorePath = null;

		var handleHashChange = function handleHashChange() {
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) {
		// Ensure we always have a properly-encoded hash.
		replaceHashPath(encodedPath);
		} else {
		var location = getDOMLocation();
		var prevLocation = history.location;

		if (!forceNextPop && (0, _LocationUtils.locationsAreEqual)(prevLocation, location)) return; // A hashchange doesn't always == location change.

		if (ignorePath === (0, _PathUtils.createPath)(location)) return; // Ignore this change; we already setState in push/replace.

		ignorePath = null;

		handlePop(location);
		}
		};

		var handlePop = function handlePop(location) {
		if (forceNextPop) {
		forceNextPop = false;
		setState();
		} else {
		var action = 'POP';

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({ action: action, location: location });
		} else {
		revertPop(location);
		}
		});
		}
		};

		var revertPop = function revertPop(fromLocation) {
		var toLocation = history.location;

		// TODO: We could probably make this more reliable by
		// keeping a list of paths we've seen in sessionStorage.
		// Instead, we just default to 0 for paths we don't know.

		var toIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(toLocation));

		if (toIndex === -1) toIndex = 0;

		var fromIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(fromLocation));

		if (fromIndex === -1) fromIndex = 0;

		var delta = toIndex - fromIndex;

		if (delta) {
		forceNextPop = true;
		go(delta);
		}
		};

		// Ensure the hash is encoded properly before doing anything else.
		var path = getHashPath();
		var encodedPath = encodePath(path);

		if (path !== encodedPath) replaceHashPath(encodedPath);

		var initialLocation = getDOMLocation();
		var allPaths = [(0, _PathUtils.createPath)(initialLocation)];

		// Public interface

		var createHref = function createHref(location) {
		return '#' + encodePath(basename + (0, _PathUtils.createPath)(location));
		};

		var push = function push(path, state) {
		false ? (0, _warning2.default)(state === undefined, 'Hash history cannot push state; it is ignored') : void 0;

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = (0, _PathUtils.createPath)(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a PUSH, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		pushHashPath(encodedPath);

		var prevIndex = allPaths.lastIndexOf((0, _PathUtils.createPath)(history.location));
		var nextPaths = allPaths.slice(0, prevIndex === -1 ? 0 : prevIndex + 1);

		nextPaths.push(path);
		allPaths = nextPaths;

		setState({ action: action, location: location });
		} else {
		false ? (0, _warning2.default)(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack') : void 0;

		setState();
		}
		});
		};

		var replace = function replace(path, state) {
		false ? (0, _warning2.default)(state === undefined, 'Hash history cannot replace state; it is ignored') : void 0;

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, undefined, undefined, history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var path = (0, _PathUtils.createPath)(location);
		var encodedPath = encodePath(basename + path);
		var hashChanged = getHashPath() !== encodedPath;

		if (hashChanged) {
		// We cannot tell if a hashchange was caused by a REPLACE, so we'd
		// rather setState here and ignore the hashchange. The caveat here
		// is that other hash histories in the page will consider it a POP.
		ignorePath = path;
		replaceHashPath(encodedPath);
		}

		var prevIndex = allPaths.indexOf((0, _PathUtils.createPath)(history.location));

		if (prevIndex !== -1) allPaths[prevIndex] = path;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		false ? (0, _warning2.default)(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser') : void 0;

		globalHistory.go(n);
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var listenerCount = 0;

		var checkDOMListeners = function checkDOMListeners(delta) {
		listenerCount += delta;

		if (listenerCount === 1) {
		(0, _DOMUtils.addEventListener)(window, HashChangeEvent, handleHashChange);
		} else if (listenerCount === 0) {
		(0, _DOMUtils.removeEventListener)(window, HashChangeEvent, handleHashChange);
		}
		};

		var isBlocked = false;

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;

		var unblock = transitionManager.setPrompt(prompt);

		if (!isBlocked) {
		checkDOMListeners(1);
		isBlocked = true;
		}

		return function () {
		if (isBlocked) {
		isBlocked = false;
		checkDOMListeners(-1);
		}

		return unblock();
		};
		};

		var listen = function listen(listener) {
		var unlisten = transitionManager.appendListener(listener);
		checkDOMListeners(1);

		return function () {
		checkDOMListeners(-1);
		unlisten();
		};
		};

		var history = {
		length: globalHistory.length,
		action: 'POP',
		location: initialLocation,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createHashHistory;

		/***/ },
		/* 11 */
		/***/ function(module, exports, __webpack_require__) {

		'use strict';

		exports.__esModule = true;

		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 _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 _warning = __webpack_require__(6);

		var _warning2 = _interopRequireDefault(_warning);

		var _PathUtils = __webpack_require__(4);

		var _LocationUtils = __webpack_require__(1);

		var _createTransitionManager = __webpack_require__(8);

		var _createTransitionManager2 = _interopRequireDefault(_createTransitionManager);

		function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

		var clamp = function clamp(n, lowerBound, upperBound) {
		return Math.min(Math.max(n, lowerBound), upperBound);
		};

		/**
		* Creates a history object that stores locations in memory.
		*/
		var createMemoryHistory = function createMemoryHistory() {
		var props = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
		var getUserConfirmation = props.getUserConfirmation,
		_props$initialEntries = props.initialEntries,
		initialEntries = _props$initialEntries === undefined ? ['/'] : _props$initialEntries,
		_props$initialIndex = props.initialIndex,
		initialIndex = _props$initialIndex === undefined ? 0 : _props$initialIndex,
		_props$keyLength = props.keyLength,
		keyLength = _props$keyLength === undefined ? 6 : _props$keyLength;


		var transitionManager = (0, _createTransitionManager2.default)();

		var setState = function setState(nextState) {
		_extends(history, nextState);

		history.length = history.entries.length;

		transitionManager.notifyListeners(history.location, history.action);
		};

		var createKey = function createKey() {
		return Math.random().toString(36).substr(2, keyLength);
		};

		var index = clamp(initialIndex, 0, initialEntries.length - 1);
		var entries = initialEntries.map(function (entry) {
		return typeof entry === 'string' ? (0, _LocationUtils.createLocation)(entry, undefined, createKey()) : (0, _LocationUtils.createLocation)(entry, undefined, entry.key \|\| createKey());
		});

		// Public interface

		var createHref = _PathUtils.createPath;

		var push = function push(path, state) {
		false ? (0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to push when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;

		var action = 'PUSH';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		var prevIndex = history.index;
		var nextIndex = prevIndex + 1;

		var nextEntries = history.entries.slice(0);
		if (nextEntries.length > nextIndex) {
		nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);
		} else {
		nextEntries.push(location);
		}

		setState({
		action: action,
		location: location,
		index: nextIndex,
		entries: nextEntries
		});
		});
		};

		var replace = function replace(path, state) {
		false ? (0, _warning2.default)(!((typeof path === 'undefined' ? 'undefined' : _typeof(path)) === 'object' && path.state !== undefined && state !== undefined), 'You should avoid providing a 2nd state argument to replace when the 1st ' + 'argument is a location-like object that already has state; it is ignored') : void 0;

		var action = 'REPLACE';
		var location = (0, _LocationUtils.createLocation)(path, state, createKey(), history.location);

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (!ok) return;

		history.entries[history.index] = location;

		setState({ action: action, location: location });
		});
		};

		var go = function go(n) {
		var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);

		var action = 'POP';
		var location = history.entries[nextIndex];

		transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {
		if (ok) {
		setState({
		action: action,
		location: location,
		index: nextIndex
		});
		} else {
		// Mimic the behavior of DOM histories by
		// causing a render after a cancelled POP.
		setState();
		}
		});
		};

		var goBack = function goBack() {
		return go(-1);
		};

		var goForward = function goForward() {
		return go(1);
		};

		var canGo = function canGo(n) {
		var nextIndex = history.index + n;
		return nextIndex >= 0 && nextIndex < history.entries.length;
		};

		var block = function block() {
		var prompt = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
		return transitionManager.setPrompt(prompt);
		};

		var listen = function listen(listener) {
		return transitionManager.appendListener(listener);
		};

		var history = {
		length: entries.length,
		action: 'POP',
		location: entries[index],
		index: index,
		entries: entries,
		createHref: createHref,
		push: push,
		replace: replace,
		go: go,
		goBack: goBack,
		goForward: goForward,
		canGo: canGo,
		block: block,
		listen: listen
		};

		return history;
		};

		exports.default = createMemoryHistory;

		/***/ }
		/******/ ])
		});
		;
		})));

umd/history.min.js

		@@ -1,1 +0,1 @@
		!function(t,n){"object"==typeof exports&&"object"==typeof module?module.exports=n():"function"==typeof define&&define.amd?define([],n):"object"==typeof exports?exports.History=n():t.History=n()}(this,function(){return function(t){function n(o){if(e[o])return e[o].exports;var r=e[o]={exports:{},id:o,loaded:!1};return t[o].call(r.exports,r,r.exports,n),r.loaded=!0,r.exports}var e={};return n.m=t,n.c=e,n.p="",n(0)}([function(t,n,e){"use strict";function o(t){return t&&t.__esModule?t:{default:t}}n.__esModule=!0,n.createPath=n.parsePath=n.locationsAreEqual=n.createLocation=n.createMemoryHistory=n.createHashHistory=n.createBrowserHistory=void 0;var r=e(2);Object.defineProperty(n,"createLocation",{enumerable:!0,get:function(){return r.createLocation}}),Object.defineProperty(n,"locationsAreEqual",{enumerable:!0,get:function(){return r.locationsAreEqual}});var i=e(1);Object.defineProperty(n,"parsePath",{enumerable:!0,get:function(){return i.parsePath}}),Object.defineProperty(n,"createPath",{enumerable:!0,get:function(){return i.createPath}});var a=e(7),c=o(a),u=e(8),s=o(u),f=e(9),l=o(f);n.createBrowserHistory=c.default,n.createHashHistory=s.default,n.createMemoryHistory=l.default},function(t,n){"use strict";n.__esModule=!0;var e=(n.addLeadingSlash=function(t){return"/"===t.charAt(0)?t:"/"+t},n.stripLeadingSlash=function(t){return"/"===t.charAt(0)?t.substr(1):t},n.hasBasename=function(t,n){return new RegExp("^"+n+"(\\/\|\\?\|#\|$)","i").test(t)});n.stripBasename=function(t,n){return e(t,n)?t.substr(n.length):t},n.stripTrailingSlash=function(t){return"/"===t.charAt(t.length-1)?t.slice(0,-1):t},n.parsePath=function(t){var n=t\|\|"/",e="",o="",r=n.indexOf("#");r!==-1&&(o=n.substr(r),n=n.substr(0,r));var i=n.indexOf("?");return i!==-1&&(e=n.substr(i),n=n.substr(0,i)),{pathname:n,search:"?"===e?"":e,hash:"#"===o?"":o}},n.createPath=function(t){var n=t.pathname,e=t.search,o=t.hash,r=n\|\|"/";return e&&"?"!==e&&(r+="?"===e.charAt(0)?e:"?"+e),o&&"#"!==o&&(r+="#"===o.charAt(0)?o:"#"+o),r}},function(t,n,e){"use strict";function o(t){return t&&t.__esModule?t:{default:t}}n.__esModule=!0,n.locationsAreEqual=n.createLocation=void 0;var r=Object.assign\|\|function(t){for(var n=1;n<arguments.length;n++){var e=arguments[n];for(var o in e)Object.prototype.hasOwnProperty.call(e,o)&&(t[o]=e[o])}return t},i=e(10),a=o(i),c=e(11),u=o(c),s=e(1);n.createLocation=function(t,n,e,o){var i=void 0;"string"==typeof t?(i=(0,s.parsePath)(t),i.state=n):(i=r({},t),void 0===i.pathname&&(i.pathname=""),i.search?"?"!==i.search.charAt(0)&&(i.search="?"+i.search):i.search="",i.hash?"#"!==i.hash.charAt(0)&&(i.hash="#"+i.hash):i.hash="",void 0!==n&&void 0===i.state&&(i.state=n));try{i.pathname=decodeURI(i.pathname)}catch(t){throw t instanceof URIError?new URIError('Pathname "'+i.pathname+'" could not be decoded. 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es/index.js

LICENSE.md

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