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isProduction = process.env.NODE_ENV === 'production';\nvar prefix = 'Invariant failed';\nfunction invariant(condition, message) {\n    if (condition) {\n        return;\n    }\n    if (isProduction) {\n        throw new Error(prefix);\n    }\n    throw new Error(prefix + \": \" + (message || ''));\n}\n\nexport default invariant;\n","function isAbsolute(pathname) {\n  return pathname.charAt(0) === '/';\n}\n\n// About 1.5x faster than the two-arg version of Array#splice()\nfunction spliceOne(list, index) {\n  for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1) {\n    list[i] = list[k];\n  }\n\n  list.pop();\n}\n\n// This implementation is based heavily on node's url.parse\nfunction resolvePathname(to, from) {\n  if (from === undefined) from = '';\n\n  var toParts = (to && to.split('/')) || [];\n  var fromParts = (from && from.split('/')) || [];\n\n  var isToAbs = to && isAbsolute(to);\n  var isFromAbs = from && isAbsolute(from);\n  var mustEndAbs = isToAbs || isFromAbs;\n\n  if (to && isAbsolute(to)) {\n    // to is absolute\n    fromParts = toParts;\n  } else if (toParts.length) {\n    // to is relative, drop the filename\n    fromParts.pop();\n    fromParts = fromParts.concat(toParts);\n  }\n\n  if (!fromParts.length) return '/';\n\n  var hasTrailingSlash;\n  if (fromParts.length) {\n    var last = fromParts[fromParts.length - 1];\n    hasTrailingSlash = last === '.' || last === '..' || last === '';\n  } else {\n    hasTrailingSlash = false;\n  }\n\n  var up = 0;\n  for (var i = fromParts.length; i >= 0; i--) {\n    var part = fromParts[i];\n\n    if (part === '.') {\n      spliceOne(fromParts, i);\n    } else if (part === '..') {\n      spliceOne(fromParts, i);\n      up++;\n    } else if (up) {\n      spliceOne(fromParts, i);\n      up--;\n    }\n  }\n\n  if (!mustEndAbs) for (; up--; up) fromParts.unshift('..');\n\n  if (\n    mustEndAbs &&\n    fromParts[0] !== '' &&\n    (!fromParts[0] || !isAbsolute(fromParts[0]))\n  )\n    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valueEqual(a[key], b[key]);\n    });\n  }\n\n  return false;\n}\n\nexport default valueEqual;\n","import React, { Component } from 'react';\nimport _inheritsLoose from '@babel/runtime/helpers/esm/inheritsLoose';\nimport PropTypes from 'prop-types';\nimport warning from 'tiny-warning';\n\nvar MAX_SIGNED_31_BIT_INT = 1073741823;\nvar commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : {};\n\nfunction getUniqueId() {\n  var key = '__global_unique_id__';\n  return commonjsGlobal[key] = (commonjsGlobal[key] || 0) + 1;\n}\n\nfunction objectIs(x, y) {\n  if (x === y) {\n    return x !== 0 || 1 / x === 1 / y;\n  } else {\n    return x !== x && y !== y;\n  }\n}\n\nfunction createEventEmitter(value) {\n  var handlers = [];\n  return {\n    on: function on(handler) {\n      handlers.push(handler);\n    },\n    off: function off(handler) {\n      handlers = handlers.filter(function (h) {\n        return h !== handler;\n      });\n    },\n    get: function get() {\n      return value;\n    },\n    set: function set(newValue, changedBits) {\n      value = newValue;\n      handlers.forEach(function (handler) {\n        return handler(value, changedBits);\n      });\n    }\n  };\n}\n\nfunction onlyChild(children) {\n  return Array.isArray(children) ? children[0] : children;\n}\n\nfunction createReactContext(defaultValue, calculateChangedBits) {\n  var _Provider$childContex, _Consumer$contextType;\n\n  var contextProp = '__create-react-context-' + getUniqueId() + '__';\n\n  var Provider = /*#__PURE__*/function (_Component) {\n    _inheritsLoose(Provider, _Component);\n\n    function Provider() {\n      var _this;\n\n      _this = _Component.apply(this, arguments) || this;\n      _this.emitter = createEventEmitter(_this.props.value);\n      return _this;\n    }\n\n    var _proto = Provider.prototype;\n\n    _proto.getChildContext = function getChildContext() {\n      var _ref;\n\n      return _ref = {}, _ref[contextProp] = this.emitter, _ref;\n    };\n\n    _proto.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n      if (this.props.value !== nextProps.value) {\n        var oldValue = this.props.value;\n        var newValue = nextProps.value;\n        var changedBits;\n\n        if (objectIs(oldValue, newValue)) {\n          changedBits = 0;\n        } else {\n          changedBits = typeof calculateChangedBits === 'function' ? calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;\n\n          if (process.env.NODE_ENV !== 'production') {\n            warning((changedBits & MAX_SIGNED_31_BIT_INT) === changedBits, 'calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: ' + changedBits);\n          }\n\n          changedBits |= 0;\n\n          if (changedBits !== 0) {\n            this.emitter.set(nextProps.value, changedBits);\n          }\n        }\n      }\n    };\n\n    _proto.render = function render() {\n      return this.props.children;\n    };\n\n    return Provider;\n  }(Component);\n\n  Provider.childContextTypes = (_Provider$childContex = {}, _Provider$childContex[contextProp] = PropTypes.object.isRequired, _Provider$childContex);\n\n  var Consumer = /*#__PURE__*/function (_Component2) {\n    _inheritsLoose(Consumer, _Component2);\n\n    function Consumer() {\n      var _this2;\n\n      _this2 = _Component2.apply(this, arguments) || this;\n      _this2.state = {\n        value: _this2.getValue()\n      };\n\n      _this2.onUpdate = function (newValue, changedBits) {\n        var observedBits = _this2.observedBits | 0;\n\n        if ((observedBits & changedBits) !== 0) {\n          _this2.setState({\n            value: _this2.getValue()\n          });\n        }\n      };\n\n      return _this2;\n    }\n\n    var _proto2 = Consumer.prototype;\n\n    _proto2.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {\n      var observedBits = nextProps.observedBits;\n      this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n    };\n\n    _proto2.componentDidMount = function componentDidMount() {\n      if (this.context[contextProp]) {\n        this.context[contextProp].on(this.onUpdate);\n      }\n\n      var observedBits = this.props.observedBits;\n      this.observedBits = observedBits === undefined || observedBits === null ? MAX_SIGNED_31_BIT_INT : observedBits;\n    };\n\n    _proto2.componentWillUnmount = function componentWillUnmount() {\n      if (this.context[contextProp]) {\n        this.context[contextProp].off(this.onUpdate);\n      }\n    };\n\n    _proto2.getValue = function getValue() {\n      if (this.context[contextProp]) {\n        return this.context[contextProp].get();\n      } else {\n        return defaultValue;\n      }\n    };\n\n    _proto2.render = function render() {\n      return onlyChild(this.props.children)(this.state.value);\n    };\n\n    return Consumer;\n  }(Component);\n\n  Consumer.contextTypes = (_Consumer$contextType = {}, _Consumer$contextType[contextProp] = PropTypes.object, _Consumer$contextType);\n  return {\n    Provider: Provider,\n    Consumer: Consumer\n  };\n}\n\nvar index = React.createContext || createReactContext;\n\nexport default index;\n","var isarray = require('isarray')\n\n/**\n * Expose `pathToRegexp`.\n */\nmodule.exports = pathToRegexp\nmodule.exports.parse = parse\nmodule.exports.compile = compile\nmodule.exports.tokensToFunction = tokensToFunction\nmodule.exports.tokensToRegExp = tokensToRegExp\n\n/**\n * The main path matching regexp utility.\n *\n * @type {RegExp}\n */\nvar PATH_REGEXP = new RegExp([\n  // Match escaped characters that would otherwise appear in future matches.\n  // This allows the user to escape special characters that won't transform.\n  '(\\\\\\\\.)',\n  // Match Express-style parameters and un-named parameters with a prefix\n  // and optional suffixes. Matches appear as:\n  //\n  // \"/:test(\\\\d+)?\" => [\"/\", \"test\", \"\\d+\", undefined, \"?\", undefined]\n  // \"/route(\\\\d+)\"  => [undefined, undefined, undefined, \"\\d+\", undefined, undefined]\n  // \"/*\"            => [\"/\", undefined, undefined, undefined, undefined, \"*\"]\n  '([\\\\/.])?(?:(?:\\\\:(\\\\w+)(?:\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))?|\\\\(((?:\\\\\\\\.|[^\\\\\\\\()])+)\\\\))([+*?])?|(\\\\*))'\n].join('|'), 'g')\n\n/**\n * Parse a string for the raw tokens.\n *\n * @param  {string}  str\n * @param  {Object=} options\n * @return {!Array}\n */\nfunction parse (str, options) {\n  var tokens = []\n  var key = 0\n  var index = 0\n  var path = ''\n  var defaultDelimiter = options && options.delimiter || '/'\n  var res\n\n  while ((res = PATH_REGEXP.exec(str)) != null) {\n    var m = res[0]\n    var escaped = res[1]\n    var offset = res.index\n    path += str.slice(index, offset)\n    index = offset + m.length\n\n    // Ignore already escaped sequences.\n    if (escaped) {\n      path += escaped[1]\n      continue\n    }\n\n    var next = str[index]\n    var prefix = res[2]\n    var name = res[3]\n    var capture = res[4]\n    var group = res[5]\n    var modifier = res[6]\n    var asterisk = res[7]\n\n    // Push the current path onto the tokens.\n    if (path) {\n      tokens.push(path)\n      path = ''\n    }\n\n    var partial = prefix != null && next != null && next !== prefix\n    var repeat = modifier === '+' || modifier === '*'\n    var optional = modifier === '?' || modifier === '*'\n    var delimiter = res[2] || defaultDelimiter\n    var pattern = capture || group\n\n    tokens.push({\n      name: name || key++,\n      prefix: prefix || '',\n      delimiter: delimiter,\n      optional: optional,\n      repeat: repeat,\n      partial: partial,\n      asterisk: !!asterisk,\n      pattern: pattern ? escapeGroup(pattern) : (asterisk ? '.*' : '[^' + escapeString(delimiter) + ']+?')\n    })\n  }\n\n  // Match any characters still remaining.\n  if (index < str.length) {\n    path += str.substr(index)\n  }\n\n  // If the path exists, push it onto the end.\n  if (path) {\n    tokens.push(path)\n  }\n\n  return tokens\n}\n\n/**\n * Compile a string to a template function for the path.\n *\n * @param  {string}             str\n * @param  {Object=}            options\n * @return {!function(Object=, Object=)}\n */\nfunction compile (str, options) {\n  return tokensToFunction(parse(str, options), options)\n}\n\n/**\n * Prettier encoding of URI path segments.\n *\n * @param  {string}\n * @return {string}\n */\nfunction encodeURIComponentPretty (str) {\n  return encodeURI(str).replace(/[\\/?#]/g, function (c) {\n    return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n  })\n}\n\n/**\n * Encode the asterisk parameter. Similar to `pretty`, but allows slashes.\n *\n * @param  {string}\n * @return {string}\n */\nfunction encodeAsterisk (str) {\n  return encodeURI(str).replace(/[?#]/g, function (c) {\n    return '%' + c.charCodeAt(0).toString(16).toUpperCase()\n  })\n}\n\n/**\n * Expose a method for transforming tokens into the path function.\n */\nfunction tokensToFunction (tokens, options) {\n  // Compile all the tokens into regexps.\n  var matches = new Array(tokens.length)\n\n  // Compile all the patterns before compilation.\n  for (var i = 0; i < tokens.length; i++) {\n    if (typeof tokens[i] === 'object') {\n      matches[i] = new RegExp('^(?:' + tokens[i].pattern + ')$', flags(options))\n    }\n  }\n\n  return function (obj, opts) {\n    var path = ''\n    var data = obj || {}\n    var options = opts || {}\n    var encode = options.pretty ? encodeURIComponentPretty : encodeURIComponent\n\n    for (var i = 0; i < tokens.length; i++) {\n      var token = tokens[i]\n\n      if (typeof token === 'string') {\n        path += token\n\n        continue\n      }\n\n      var value = data[token.name]\n      var segment\n\n      if (value == null) {\n        if (token.optional) {\n          // Prepend partial segment prefixes.\n          if (token.partial) {\n            path += token.prefix\n          }\n\n          continue\n        } else {\n          throw new TypeError('Expected \"' + token.name + '\" to be defined')\n        }\n      }\n\n      if (isarray(value)) {\n        if (!token.repeat) {\n          throw new TypeError('Expected \"' + token.name + '\" to not repeat, but received `' + JSON.stringify(value) + '`')\n        }\n\n        if (value.length === 0) {\n          if (token.optional) {\n            continue\n          } else {\n            throw new TypeError('Expected \"' + token.name + '\" to not be empty')\n          }\n        }\n\n        for (var j = 0; j < value.length; j++) {\n          segment = encode(value[j])\n\n          if (!matches[i].test(segment)) {\n            throw new TypeError('Expected all \"' + token.name + '\" to match \"' + token.pattern + '\", but received `' + JSON.stringify(segment) + '`')\n          }\n\n          path += (j === 0 ? token.prefix : token.delimiter) + segment\n        }\n\n        continue\n      }\n\n      segment = token.asterisk ? encodeAsterisk(value) : encode(value)\n\n      if (!matches[i].test(segment)) {\n        throw new TypeError('Expected \"' + token.name + '\" to match \"' + token.pattern + '\", but received \"' + segment + '\"')\n      }\n\n      path += token.prefix + segment\n    }\n\n    return path\n  }\n}\n\n/**\n * Escape a regular expression string.\n *\n * @param  {string} str\n * @return {string}\n */\nfunction escapeString (str) {\n  return str.replace(/([.+*?=^!:${}()[\\]|\\/\\\\])/g, '\\\\$1')\n}\n\n/**\n * Escape the capturing group by escaping special characters and meaning.\n *\n * @param  {string} group\n * @return {string}\n */\nfunction escapeGroup (group) {\n  return group.replace(/([=!:$\\/()])/g, '\\\\$1')\n}\n\n/**\n * Attach the keys as a property of the regexp.\n *\n * @param  {!RegExp} re\n * @param  {Array}   keys\n * @return {!RegExp}\n */\nfunction attachKeys (re, keys) {\n  re.keys = keys\n  return re\n}\n\n/**\n * Get the flags for a regexp from the options.\n *\n * @param  {Object} options\n * @return {string}\n */\nfunction flags (options) {\n  return options && options.sensitive ? '' : 'i'\n}\n\n/**\n * Pull out keys from a regexp.\n *\n * @param  {!RegExp} path\n * @param  {!Array}  keys\n * @return {!RegExp}\n */\nfunction regexpToRegexp (path, keys) {\n  // Use a negative lookahead to match only capturing groups.\n  var groups = path.source.match(/\\((?!\\?)/g)\n\n  if (groups) {\n    for (var i = 0; i < groups.length; i++) {\n      keys.push({\n        name: i,\n        prefix: null,\n        delimiter: null,\n        optional: false,\n        repeat: false,\n        partial: false,\n        asterisk: false,\n        pattern: null\n      })\n    }\n  }\n\n  return attachKeys(path, keys)\n}\n\n/**\n * Transform an array into a regexp.\n *\n * @param  {!Array}  path\n * @param  {Array}   keys\n * @param  {!Object} options\n * @return {!RegExp}\n */\nfunction arrayToRegexp (path, keys, options) {\n  var parts = []\n\n  for (var i = 0; i < path.length; i++) {\n    parts.push(pathToRegexp(path[i], keys, options).source)\n  }\n\n  var regexp = new RegExp('(?:' + parts.join('|') + ')', flags(options))\n\n  return attachKeys(regexp, keys)\n}\n\n/**\n * Create a path regexp from string input.\n *\n * @param  {string}  path\n * @param  {!Array}  keys\n * @param  {!Object} options\n * @return {!RegExp}\n */\nfunction stringToRegexp (path, keys, options) {\n  return tokensToRegExp(parse(path, options), keys, options)\n}\n\n/**\n * Expose a function for taking tokens and returning a RegExp.\n *\n * @param  {!Array}          tokens\n * @param  {(Array|Object)=} keys\n * @param  {Object=}         options\n * @return {!RegExp}\n */\nfunction tokensToRegExp (tokens, keys, options) {\n  if (!isarray(keys)) {\n    options = /** @type {!Object} */ (keys || options)\n    keys = []\n  }\n\n  options = options || {}\n\n  var strict = options.strict\n  var end = options.end !== false\n  var route = ''\n\n  // Iterate over the tokens and create our regexp string.\n  for (var i = 0; i < tokens.length; i++) {\n    var token = tokens[i]\n\n    if (typeof token === 'string') {\n      route += escapeString(token)\n    } else {\n      var prefix = escapeString(token.prefix)\n      var capture = '(?:' + token.pattern + ')'\n\n      keys.push(token)\n\n      if (token.repeat) {\n        capture += '(?:' + prefix + capture + ')*'\n      }\n\n      if (token.optional) {\n        if (!token.partial) {\n          capture = '(?:' + prefix + '(' + capture + '))?'\n        } else {\n          capture = prefix + '(' + capture + ')?'\n        }\n      } else {\n        capture = prefix + '(' + capture + ')'\n      }\n\n      route += capture\n    }\n  }\n\n  var delimiter = escapeString(options.delimiter || '/')\n  var endsWithDelimiter = route.slice(-delimiter.length) === delimiter\n\n  // In non-strict mode we allow a slash at the end of match. If the path to\n  // match already ends with a slash, we remove it for consistency. The slash\n  // is valid at the end of a path match, not in the middle. This is important\n  // in non-ending mode, where \"/test/\" shouldn't match \"/test//route\".\n  if (!strict) {\n    route = (endsWithDelimiter ? route.slice(0, -delimiter.length) : route) + '(?:' + delimiter + '(?=$))?'\n  }\n\n  if (end) {\n    route += '$'\n  } else {\n    // In non-ending mode, we need the capturing groups to match as much as\n    // possible by using a positive lookahead to the end or next path segment.\n    route += strict && endsWithDelimiter ? '' : '(?=' + delimiter + '|$)'\n  }\n\n  return attachKeys(new RegExp('^' + route, flags(options)), keys)\n}\n\n/**\n * Normalize the given path string, returning a regular expression.\n *\n * An empty array can be passed in for the keys, which will hold the\n * placeholder key descriptions. For example, using `/user/:id`, `keys` will\n * contain `[{ name: 'id', delimiter: '/', optional: false, repeat: false }]`.\n *\n * @param  {(string|RegExp|Array)} path\n * @param  {(Array|Object)=}       keys\n * @param  {Object=}               options\n * @return {!RegExp}\n */\nfunction pathToRegexp (path, keys, options) {\n  if (!isarray(keys)) {\n    options = /** @type {!Object} */ (keys || options)\n    keys = []\n  }\n\n  options = options || {}\n\n  if (path instanceof RegExp) {\n    return regexpToRegexp(path, /** @type {!Array} */ (keys))\n  }\n\n  if (isarray(path)) {\n    return arrayToRegexp(/** @type {!Array} */ (path), /** @type {!Array} */ (keys), options)\n  }\n\n  return stringToRegexp(/** @type {string} */ (path), /** @type {!Array} */ (keys), options)\n}\n","module.exports = Array.isArray || function (arr) {\n  return Object.prototype.toString.call(arr) == '[object Array]';\n};\n","import _extends from '@babel/runtime/helpers/esm/extends';\nimport resolvePathname from 'resolve-pathname';\nimport valueEqual from 'value-equal';\nimport warning from 'tiny-warning';\nimport invariant from 'tiny-invariant';\n\nfunction addLeadingSlash(path) {\n  return path.charAt(0) === '/' ? path : '/' + path;\n}\nfunction stripLeadingSlash(path) {\n  return path.charAt(0) === '/' ? path.substr(1) : path;\n}\nfunction hasBasename(path, prefix) {\n  return path.toLowerCase().indexOf(prefix.toLowerCase()) === 0 && '/?#'.indexOf(path.charAt(prefix.length)) !== -1;\n}\nfunction stripBasename(path, prefix) {\n  return hasBasename(path, prefix) ? path.substr(prefix.length) : path;\n}\nfunction stripTrailingSlash(path) {\n  return path.charAt(path.length - 1) === '/' ? path.slice(0, -1) : path;\n}\nfunction parsePath(path) {\n  var pathname = path || '/';\n  var search = '';\n  var hash = '';\n  var hashIndex = pathname.indexOf('#');\n\n  if (hashIndex !== -1) {\n    hash = pathname.substr(hashIndex);\n    pathname = pathname.substr(0, hashIndex);\n  }\n\n  var searchIndex = pathname.indexOf('?');\n\n  if (searchIndex !== -1) {\n    search = pathname.substr(searchIndex);\n    pathname = pathname.substr(0, searchIndex);\n  }\n\n  return {\n    pathname: pathname,\n    search: search === '?' ? '' : search,\n    hash: hash === '#' ? '' : hash\n  };\n}\nfunction createPath(location) {\n  var pathname = location.pathname,\n      search = location.search,\n      hash = location.hash;\n  var path = pathname || '/';\n  if (search && search !== '?') path += search.charAt(0) === '?' ? search : \"?\" + search;\n  if (hash && hash !== '#') path += hash.charAt(0) === '#' ? hash : \"#\" + hash;\n  return path;\n}\n\nfunction createLocation(path, state, key, currentLocation) {\n  var location;\n\n  if (typeof path === 'string') {\n    // Two-arg form: push(path, state)\n    location = parsePath(path);\n    location.state = state;\n  } else {\n    // One-arg form: push(location)\n    location = _extends({}, path);\n    if (location.pathname === undefined) location.pathname = '';\n\n    if (location.search) {\n      if (location.search.charAt(0) !== '?') location.search = '?' + location.search;\n    } else {\n      location.search = '';\n    }\n\n    if (location.hash) {\n      if (location.hash.charAt(0) !== '#') location.hash = '#' + location.hash;\n    } else {\n      location.hash = '';\n    }\n\n    if (state !== undefined && location.state === undefined) location.state = state;\n  }\n\n  try {\n    location.pathname = decodeURI(location.pathname);\n  } catch (e) {\n    if (e instanceof URIError) {\n      throw new URIError('Pathname \"' + location.pathname + '\" could not be decoded. ' + 'This is likely caused by an invalid percent-encoding.');\n    } else {\n      throw e;\n    }\n  }\n\n  if (key) location.key = key;\n\n  if (currentLocation) {\n    // Resolve incomplete/relative pathname relative to current location.\n    if (!location.pathname) {\n      location.pathname = currentLocation.pathname;\n    } else if (location.pathname.charAt(0) !== '/') {\n      location.pathname = resolvePathname(location.pathname, currentLocation.pathname);\n    }\n  } else {\n    // When there is no prior location and pathname is empty, set it to /\n    if (!location.pathname) {\n      location.pathname = '/';\n    }\n  }\n\n  return location;\n}\nfunction locationsAreEqual(a, b) {\n  return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash && a.key === b.key && valueEqual(a.state, b.state);\n}\n\nfunction createTransitionManager() {\n  var prompt = null;\n\n  function setPrompt(nextPrompt) {\n    process.env.NODE_ENV !== \"production\" ? warning(prompt == null, 'A history supports only one prompt at a time') : void 0;\n    prompt = nextPrompt;\n    return function () {\n      if (prompt === nextPrompt) prompt = null;\n    };\n  }\n\n  function confirmTransitionTo(location, action, getUserConfirmation, callback) {\n    // TODO: If another transition starts while we're still confirming\n    // the previous one, we may end up in a weird state. Figure out the\n    // best way to handle this.\n    if (prompt != null) {\n      var result = typeof prompt === 'function' ? prompt(location, action) : prompt;\n\n      if (typeof result === 'string') {\n        if (typeof getUserConfirmation === 'function') {\n          getUserConfirmation(result, callback);\n        } else {\n          process.env.NODE_ENV !== \"production\" ? warning(false, 'A history needs a getUserConfirmation function in order to use a prompt message') : void 0;\n          callback(true);\n        }\n      } else {\n        // Return false from a transition hook to cancel the transition.\n        callback(result !== false);\n      }\n    } else {\n      callback(true);\n    }\n  }\n\n  var listeners = [];\n\n  function appendListener(fn) {\n    var isActive = true;\n\n    function listener() {\n      if (isActive) fn.apply(void 0, arguments);\n    }\n\n    listeners.push(listener);\n    return function () {\n      isActive = false;\n      listeners = listeners.filter(function (item) {\n        return item !== listener;\n      });\n    };\n  }\n\n  function notifyListeners() {\n    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n      args[_key] = arguments[_key];\n    }\n\n    listeners.forEach(function (listener) {\n      return listener.apply(void 0, args);\n    });\n  }\n\n  return {\n    setPrompt: setPrompt,\n    confirmTransitionTo: confirmTransitionTo,\n    appendListener: appendListener,\n    notifyListeners: notifyListeners\n  };\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);\nfunction getConfirmation(message, callback) {\n  callback(window.confirm(message)); // eslint-disable-line no-alert\n}\n/**\n * Returns true if the HTML5 history API is supported. Taken from Modernizr.\n *\n * https://github.com/Modernizr/Modernizr/blob/master/LICENSE\n * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js\n * changed to avoid false negatives for Windows Phones: https://github.com/reactjs/react-router/issues/586\n */\n\nfunction supportsHistory() {\n  var ua = window.navigator.userAgent;\n  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;\n  return window.history && 'pushState' in window.history;\n}\n/**\n * Returns true if browser fires popstate on hash change.\n * IE10 and IE11 do not.\n */\n\nfunction supportsPopStateOnHashChange() {\n  return window.navigator.userAgent.indexOf('Trident') === -1;\n}\n/**\n * Returns false if using go(n) with hash history causes a full page reload.\n */\n\nfunction supportsGoWithoutReloadUsingHash() {\n  return window.navigator.userAgent.indexOf('Firefox') === -1;\n}\n/**\n * Returns true if a given popstate event is an extraneous WebKit event.\n * Accounts for the fact that Chrome on iOS fires real popstate events\n * containing undefined state when pressing the back button.\n */\n\nfunction isExtraneousPopstateEvent(event) {\n  return event.state === undefined && navigator.userAgent.indexOf('CriOS') === -1;\n}\n\nvar PopStateEvent = 'popstate';\nvar HashChangeEvent = 'hashchange';\n\nfunction getHistoryState() {\n  try {\n    return window.history.state || {};\n  } catch (e) {\n    // IE 11 sometimes throws when accessing window.history.state\n    // See https://github.com/ReactTraining/history/pull/289\n    return {};\n  }\n}\n/**\n * Creates a history object that uses the HTML5 history API including\n * pushState, replaceState, and the popstate event.\n */\n\n\nfunction createBrowserHistory(props) {\n  if (props === void 0) {\n    props = {};\n  }\n\n  !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Browser history needs a DOM') : invariant(false) : void 0;\n  var globalHistory = window.history;\n  var canUseHistory = supportsHistory();\n  var needsHashChangeListener = !supportsPopStateOnHashChange();\n  var _props = props,\n      _props$forceRefresh = _props.forceRefresh,\n      forceRefresh = _props$forceRefresh === void 0 ? false : _props$forceRefresh,\n      _props$getUserConfirm = _props.getUserConfirmation,\n      getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n      _props$keyLength = _props.keyLength,\n      keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n  var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n\n  function getDOMLocation(historyState) {\n    var _ref = historyState || {},\n        key = _ref.key,\n        state = _ref.state;\n\n    var _window$location = window.location,\n        pathname = _window$location.pathname,\n        search = _window$location.search,\n        hash = _window$location.hash;\n    var path = pathname + search + hash;\n    process.env.NODE_ENV !== \"production\" ? 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 + '\".') : void 0;\n    if (basename) path = stripBasename(path, basename);\n    return createLocation(path, state, key);\n  }\n\n  function createKey() {\n    return Math.random().toString(36).substr(2, keyLength);\n  }\n\n  var transitionManager = createTransitionManager();\n\n  function setState(nextState) {\n    _extends(history, nextState);\n\n    history.length = globalHistory.length;\n    transitionManager.notifyListeners(history.location, history.action);\n  }\n\n  function handlePopState(event) {\n    // Ignore extraneous popstate events in WebKit.\n    if (isExtraneousPopstateEvent(event)) return;\n    handlePop(getDOMLocation(event.state));\n  }\n\n  function handleHashChange() {\n    handlePop(getDOMLocation(getHistoryState()));\n  }\n\n  var forceNextPop = false;\n\n  function handlePop(location) {\n    if (forceNextPop) {\n      forceNextPop = false;\n      setState();\n    } else {\n      var action = 'POP';\n      transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n        if (ok) {\n          setState({\n            action: action,\n            location: location\n          });\n        } else {\n          revertPop(location);\n        }\n      });\n    }\n  }\n\n  function revertPop(fromLocation) {\n    var toLocation = history.location; // TODO: We could probably make this more reliable by\n    // keeping a list of keys we've seen in sessionStorage.\n    // Instead, we just default to 0 for keys we don't know.\n\n    var toIndex = allKeys.indexOf(toLocation.key);\n    if (toIndex === -1) toIndex = 0;\n    var fromIndex = allKeys.indexOf(fromLocation.key);\n    if (fromIndex === -1) fromIndex = 0;\n    var delta = toIndex - fromIndex;\n\n    if (delta) {\n      forceNextPop = true;\n      go(delta);\n    }\n  }\n\n  var initialLocation = getDOMLocation(getHistoryState());\n  var allKeys = [initialLocation.key]; // Public interface\n\n  function createHref(location) {\n    return basename + createPath(location);\n  }\n\n  function push(path, state) {\n    process.env.NODE_ENV !== \"production\" ? 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') : void 0;\n    var action = 'PUSH';\n    var location = createLocation(path, state, createKey(), history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      var href = createHref(location);\n      var key = location.key,\n          state = location.state;\n\n      if (canUseHistory) {\n        globalHistory.pushState({\n          key: key,\n          state: state\n        }, null, href);\n\n        if (forceRefresh) {\n          window.location.href = href;\n        } else {\n          var prevIndex = allKeys.indexOf(history.location.key);\n          var nextKeys = allKeys.slice(0, prevIndex + 1);\n          nextKeys.push(location.key);\n          allKeys = nextKeys;\n          setState({\n            action: action,\n            location: location\n          });\n        }\n      } else {\n        process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot push state in browsers that do not support HTML5 history') : void 0;\n        window.location.href = href;\n      }\n    });\n  }\n\n  function replace(path, state) {\n    process.env.NODE_ENV !== \"production\" ? 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') : void 0;\n    var action = 'REPLACE';\n    var location = createLocation(path, state, createKey(), history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      var href = createHref(location);\n      var key = location.key,\n          state = location.state;\n\n      if (canUseHistory) {\n        globalHistory.replaceState({\n          key: key,\n          state: state\n        }, null, href);\n\n        if (forceRefresh) {\n          window.location.replace(href);\n        } else {\n          var prevIndex = allKeys.indexOf(history.location.key);\n          if (prevIndex !== -1) allKeys[prevIndex] = location.key;\n          setState({\n            action: action,\n            location: location\n          });\n        }\n      } else {\n        process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Browser history cannot replace state in browsers that do not support HTML5 history') : void 0;\n        window.location.replace(href);\n      }\n    });\n  }\n\n  function go(n) {\n    globalHistory.go(n);\n  }\n\n  function goBack() {\n    go(-1);\n  }\n\n  function goForward() {\n    go(1);\n  }\n\n  var listenerCount = 0;\n\n  function checkDOMListeners(delta) {\n    listenerCount += delta;\n\n    if (listenerCount === 1 && delta === 1) {\n      window.addEventListener(PopStateEvent, handlePopState);\n      if (needsHashChangeListener) window.addEventListener(HashChangeEvent, handleHashChange);\n    } else if (listenerCount === 0) {\n      window.removeEventListener(PopStateEvent, handlePopState);\n      if (needsHashChangeListener) window.removeEventListener(HashChangeEvent, handleHashChange);\n    }\n  }\n\n  var isBlocked = false;\n\n  function block(prompt) {\n    if (prompt === void 0) {\n      prompt = false;\n    }\n\n    var unblock = transitionManager.setPrompt(prompt);\n\n    if (!isBlocked) {\n      checkDOMListeners(1);\n      isBlocked = true;\n    }\n\n    return function () {\n      if (isBlocked) {\n        isBlocked = false;\n        checkDOMListeners(-1);\n      }\n\n      return unblock();\n    };\n  }\n\n  function listen(listener) {\n    var unlisten = transitionManager.appendListener(listener);\n    checkDOMListeners(1);\n    return function () {\n      checkDOMListeners(-1);\n      unlisten();\n    };\n  }\n\n  var history = {\n    length: globalHistory.length,\n    action: 'POP',\n    location: initialLocation,\n    createHref: createHref,\n    push: push,\n    replace: replace,\n    go: go,\n    goBack: goBack,\n    goForward: goForward,\n    block: block,\n    listen: listen\n  };\n  return history;\n}\n\nvar HashChangeEvent$1 = 'hashchange';\nvar HashPathCoders = {\n  hashbang: {\n    encodePath: function encodePath(path) {\n      return path.charAt(0) === '!' ? path : '!/' + stripLeadingSlash(path);\n    },\n    decodePath: function decodePath(path) {\n      return path.charAt(0) === '!' ? path.substr(1) : path;\n    }\n  },\n  noslash: {\n    encodePath: stripLeadingSlash,\n    decodePath: addLeadingSlash\n  },\n  slash: {\n    encodePath: addLeadingSlash,\n    decodePath: addLeadingSlash\n  }\n};\n\nfunction stripHash(url) {\n  var hashIndex = url.indexOf('#');\n  return hashIndex === -1 ? url : url.slice(0, hashIndex);\n}\n\nfunction getHashPath() {\n  // We can't use window.location.hash here because it's not\n  // consistent across browsers - Firefox will pre-decode it!\n  var href = window.location.href;\n  var hashIndex = href.indexOf('#');\n  return hashIndex === -1 ? '' : href.substring(hashIndex + 1);\n}\n\nfunction pushHashPath(path) {\n  window.location.hash = path;\n}\n\nfunction replaceHashPath(path) {\n  window.location.replace(stripHash(window.location.href) + '#' + path);\n}\n\nfunction createHashHistory(props) {\n  if (props === void 0) {\n    props = {};\n  }\n\n  !canUseDOM ? process.env.NODE_ENV !== \"production\" ? invariant(false, 'Hash history needs a DOM') : invariant(false) : void 0;\n  var globalHistory = window.history;\n  var canGoWithoutReload = supportsGoWithoutReloadUsingHash();\n  var _props = props,\n      _props$getUserConfirm = _props.getUserConfirmation,\n      getUserConfirmation = _props$getUserConfirm === void 0 ? getConfirmation : _props$getUserConfirm,\n      _props$hashType = _props.hashType,\n      hashType = _props$hashType === void 0 ? 'slash' : _props$hashType;\n  var basename = props.basename ? stripTrailingSlash(addLeadingSlash(props.basename)) : '';\n  var _HashPathCoders$hashT = HashPathCoders[hashType],\n      encodePath = _HashPathCoders$hashT.encodePath,\n      decodePath = _HashPathCoders$hashT.decodePath;\n\n  function getDOMLocation() {\n    var path = decodePath(getHashPath());\n    process.env.NODE_ENV !== \"production\" ? 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 + '\".') : void 0;\n    if (basename) path = stripBasename(path, basename);\n    return createLocation(path);\n  }\n\n  var transitionManager = createTransitionManager();\n\n  function setState(nextState) {\n    _extends(history, nextState);\n\n    history.length = globalHistory.length;\n    transitionManager.notifyListeners(history.location, history.action);\n  }\n\n  var forceNextPop = false;\n  var ignorePath = null;\n\n  function locationsAreEqual$$1(a, b) {\n    return a.pathname === b.pathname && a.search === b.search && a.hash === b.hash;\n  }\n\n  function handleHashChange() {\n    var path = getHashPath();\n    var encodedPath = encodePath(path);\n\n    if (path !== encodedPath) {\n      // Ensure we always have a properly-encoded hash.\n      replaceHashPath(encodedPath);\n    } else {\n      var location = getDOMLocation();\n      var prevLocation = history.location;\n      if (!forceNextPop && locationsAreEqual$$1(prevLocation, location)) return; // A hashchange doesn't always == location change.\n\n      if (ignorePath === createPath(location)) return; // Ignore this change; we already setState in push/replace.\n\n      ignorePath = null;\n      handlePop(location);\n    }\n  }\n\n  function handlePop(location) {\n    if (forceNextPop) {\n      forceNextPop = false;\n      setState();\n    } else {\n      var action = 'POP';\n      transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n        if (ok) {\n          setState({\n            action: action,\n            location: location\n          });\n        } else {\n          revertPop(location);\n        }\n      });\n    }\n  }\n\n  function revertPop(fromLocation) {\n    var toLocation = history.location; // TODO: We could probably make this more reliable by\n    // keeping a list of paths we've seen in sessionStorage.\n    // Instead, we just default to 0 for paths we don't know.\n\n    var toIndex = allPaths.lastIndexOf(createPath(toLocation));\n    if (toIndex === -1) toIndex = 0;\n    var fromIndex = allPaths.lastIndexOf(createPath(fromLocation));\n    if (fromIndex === -1) fromIndex = 0;\n    var delta = toIndex - fromIndex;\n\n    if (delta) {\n      forceNextPop = true;\n      go(delta);\n    }\n  } // Ensure the hash is encoded properly before doing anything else.\n\n\n  var path = getHashPath();\n  var encodedPath = encodePath(path);\n  if (path !== encodedPath) replaceHashPath(encodedPath);\n  var initialLocation = getDOMLocation();\n  var allPaths = [createPath(initialLocation)]; // Public interface\n\n  function createHref(location) {\n    var baseTag = document.querySelector('base');\n    var href = '';\n\n    if (baseTag && baseTag.getAttribute('href')) {\n      href = stripHash(window.location.href);\n    }\n\n    return href + '#' + encodePath(basename + createPath(location));\n  }\n\n  function push(path, state) {\n    process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot push state; it is ignored') : void 0;\n    var action = 'PUSH';\n    var location = createLocation(path, undefined, undefined, history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      var path = createPath(location);\n      var encodedPath = encodePath(basename + path);\n      var hashChanged = getHashPath() !== encodedPath;\n\n      if (hashChanged) {\n        // We cannot tell if a hashchange was caused by a PUSH, so we'd\n        // rather setState here and ignore the hashchange. The caveat here\n        // is that other hash histories in the page will consider it a POP.\n        ignorePath = path;\n        pushHashPath(encodedPath);\n        var prevIndex = allPaths.lastIndexOf(createPath(history.location));\n        var nextPaths = allPaths.slice(0, prevIndex + 1);\n        nextPaths.push(path);\n        allPaths = nextPaths;\n        setState({\n          action: action,\n          location: location\n        });\n      } else {\n        process.env.NODE_ENV !== \"production\" ? warning(false, 'Hash history cannot PUSH the same path; a new entry will not be added to the history stack') : void 0;\n        setState();\n      }\n    });\n  }\n\n  function replace(path, state) {\n    process.env.NODE_ENV !== \"production\" ? warning(state === undefined, 'Hash history cannot replace state; it is ignored') : void 0;\n    var action = 'REPLACE';\n    var location = createLocation(path, undefined, undefined, history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      var path = createPath(location);\n      var encodedPath = encodePath(basename + path);\n      var hashChanged = getHashPath() !== encodedPath;\n\n      if (hashChanged) {\n        // We cannot tell if a hashchange was caused by a REPLACE, so we'd\n        // rather setState here and ignore the hashchange. The caveat here\n        // is that other hash histories in the page will consider it a POP.\n        ignorePath = path;\n        replaceHashPath(encodedPath);\n      }\n\n      var prevIndex = allPaths.indexOf(createPath(history.location));\n      if (prevIndex !== -1) allPaths[prevIndex] = path;\n      setState({\n        action: action,\n        location: location\n      });\n    });\n  }\n\n  function go(n) {\n    process.env.NODE_ENV !== \"production\" ? warning(canGoWithoutReload, 'Hash history go(n) causes a full page reload in this browser') : void 0;\n    globalHistory.go(n);\n  }\n\n  function goBack() {\n    go(-1);\n  }\n\n  function goForward() {\n    go(1);\n  }\n\n  var listenerCount = 0;\n\n  function checkDOMListeners(delta) {\n    listenerCount += delta;\n\n    if (listenerCount === 1 && delta === 1) {\n      window.addEventListener(HashChangeEvent$1, handleHashChange);\n    } else if (listenerCount === 0) {\n      window.removeEventListener(HashChangeEvent$1, handleHashChange);\n    }\n  }\n\n  var isBlocked = false;\n\n  function block(prompt) {\n    if (prompt === void 0) {\n      prompt = false;\n    }\n\n    var unblock = transitionManager.setPrompt(prompt);\n\n    if (!isBlocked) {\n      checkDOMListeners(1);\n      isBlocked = true;\n    }\n\n    return function () {\n      if (isBlocked) {\n        isBlocked = false;\n        checkDOMListeners(-1);\n      }\n\n      return unblock();\n    };\n  }\n\n  function listen(listener) {\n    var unlisten = transitionManager.appendListener(listener);\n    checkDOMListeners(1);\n    return function () {\n      checkDOMListeners(-1);\n      unlisten();\n    };\n  }\n\n  var history = {\n    length: globalHistory.length,\n    action: 'POP',\n    location: initialLocation,\n    createHref: createHref,\n    push: push,\n    replace: replace,\n    go: go,\n    goBack: goBack,\n    goForward: goForward,\n    block: block,\n    listen: listen\n  };\n  return history;\n}\n\nfunction clamp(n, lowerBound, upperBound) {\n  return Math.min(Math.max(n, lowerBound), upperBound);\n}\n/**\n * Creates a history object that stores locations in memory.\n */\n\n\nfunction createMemoryHistory(props) {\n  if (props === void 0) {\n    props = {};\n  }\n\n  var _props = props,\n      getUserConfirmation = _props.getUserConfirmation,\n      _props$initialEntries = _props.initialEntries,\n      initialEntries = _props$initialEntries === void 0 ? ['/'] : _props$initialEntries,\n      _props$initialIndex = _props.initialIndex,\n      initialIndex = _props$initialIndex === void 0 ? 0 : _props$initialIndex,\n      _props$keyLength = _props.keyLength,\n      keyLength = _props$keyLength === void 0 ? 6 : _props$keyLength;\n  var transitionManager = createTransitionManager();\n\n  function setState(nextState) {\n    _extends(history, nextState);\n\n    history.length = history.entries.length;\n    transitionManager.notifyListeners(history.location, history.action);\n  }\n\n  function createKey() {\n    return Math.random().toString(36).substr(2, keyLength);\n  }\n\n  var index = clamp(initialIndex, 0, initialEntries.length - 1);\n  var entries = initialEntries.map(function (entry) {\n    return typeof entry === 'string' ? createLocation(entry, undefined, createKey()) : createLocation(entry, undefined, entry.key || createKey());\n  }); // Public interface\n\n  var createHref = createPath;\n\n  function push(path, state) {\n    process.env.NODE_ENV !== \"production\" ? 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') : void 0;\n    var action = 'PUSH';\n    var location = createLocation(path, state, createKey(), history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      var prevIndex = history.index;\n      var nextIndex = prevIndex + 1;\n      var nextEntries = history.entries.slice(0);\n\n      if (nextEntries.length > nextIndex) {\n        nextEntries.splice(nextIndex, nextEntries.length - nextIndex, location);\n      } else {\n        nextEntries.push(location);\n      }\n\n      setState({\n        action: action,\n        location: location,\n        index: nextIndex,\n        entries: nextEntries\n      });\n    });\n  }\n\n  function replace(path, state) {\n    process.env.NODE_ENV !== \"production\" ? 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') : void 0;\n    var action = 'REPLACE';\n    var location = createLocation(path, state, createKey(), history.location);\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (!ok) return;\n      history.entries[history.index] = location;\n      setState({\n        action: action,\n        location: location\n      });\n    });\n  }\n\n  function go(n) {\n    var nextIndex = clamp(history.index + n, 0, history.entries.length - 1);\n    var action = 'POP';\n    var location = history.entries[nextIndex];\n    transitionManager.confirmTransitionTo(location, action, getUserConfirmation, function (ok) {\n      if (ok) {\n        setState({\n          action: action,\n          location: location,\n          index: nextIndex\n        });\n      } else {\n        // Mimic the behavior of DOM histories by\n        // causing a render after a cancelled POP.\n        setState();\n      }\n    });\n  }\n\n  function goBack() {\n    go(-1);\n  }\n\n  function goForward() {\n    go(1);\n  }\n\n  function canGo(n) {\n    var nextIndex = history.index + n;\n    return nextIndex >= 0 && nextIndex < history.entries.length;\n  }\n\n  function block(prompt) {\n    if (prompt === void 0) {\n      prompt = false;\n    }\n\n    return transitionManager.setPrompt(prompt);\n  }\n\n  function listen(listener) {\n    return transitionManager.appendListener(listener);\n  }\n\n  var history = {\n    length: entries.length,\n    action: 'POP',\n    location: entries[index],\n    index: index,\n    entries: entries,\n    createHref: createHref,\n    push: push,\n    replace: replace,\n    go: go,\n    goBack: goBack,\n    goForward: goForward,\n    canGo: canGo,\n    block: block,\n    listen: listen\n  };\n  return history;\n}\n\nexport { createBrowserHistory, createHashHistory, createMemoryHistory, createLocation, locationsAreEqual, parsePath, createPath };\n","import createNamedContext from \"./createNameContext\";\n\nconst historyContext = /*#__PURE__*/ createNamedContext(\"Router-History\");\nexport default historyContext;\n","// TODO: Replace with React.createContext once we can assume React 16+\nimport createContext from \"mini-create-react-context\";\n\nconst createNamedContext = name => {\n  const context = createContext();\n  context.displayName = name;\n\n  return context;\n};\n\nexport default createNamedContext;\n","// TODO: Replace with React.createContext once we can assume React 16+\nimport createContext from \"mini-create-react-context\";\n\nconst createNamedContext = name => {\n  const context = createContext();\n  context.displayName = name;\n\n  return context;\n};\n\nconst context = /*#__PURE__*/ createNamedContext(\"Router\");\nexport default context;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport warning from \"tiny-warning\";\n\nimport HistoryContext from \"./HistoryContext.js\";\nimport RouterContext from \"./RouterContext.js\";\n\n/**\n * The public API for putting history on context.\n */\nclass Router extends React.Component {\n  static computeRootMatch(pathname) {\n    return { path: \"/\", url: \"/\", params: {}, isExact: pathname === \"/\" };\n  }\n\n  constructor(props) {\n    super(props);\n\n    this.state = {\n      location: props.history.location\n    };\n\n    // This is a bit of a hack. We have to start listening for location\n    // changes here in the constructor in case there are any <Redirect>s\n    // on the initial render. If there are, they will replace/push when\n    // they mount and since cDM fires in children before parents, we may\n    // get a new location before the <Router> is mounted.\n    this._isMounted = false;\n    this._pendingLocation = null;\n\n    if (!props.staticContext) {\n      this.unlisten = props.history.listen(location => {\n        if (this._isMounted) {\n          this.setState({ location });\n        } else {\n          this._pendingLocation = location;\n        }\n      });\n    }\n  }\n\n  componentDidMount() {\n    this._isMounted = true;\n\n    if (this._pendingLocation) {\n      this.setState({ location: this._pendingLocation });\n    }\n  }\n\n  componentWillUnmount() {\n    if (this.unlisten) this.unlisten();\n  }\n\n  render() {\n    return (\n      <RouterContext.Provider\n        value={{\n          history: this.props.history,\n          location: this.state.location,\n          match: Router.computeRootMatch(this.state.location.pathname),\n          staticContext: this.props.staticContext\n        }}\n      >\n        <HistoryContext.Provider\n          children={this.props.children || null}\n          value={this.props.history}\n        />\n      </RouterContext.Provider>\n    );\n  }\n}\n\nif (__DEV__) {\n  Router.propTypes = {\n    children: PropTypes.node,\n    history: PropTypes.object.isRequired,\n    staticContext: PropTypes.object\n  };\n\n  Router.prototype.componentDidUpdate = function(prevProps) {\n    warning(\n      prevProps.history === this.props.history,\n      \"You cannot change <Router history>\"\n    );\n  };\n}\n\nexport default Router;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createMemoryHistory as createHistory } from \"history\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router.js\";\n\n/**\n * The public API for a <Router> that stores location in memory.\n */\nclass MemoryRouter extends React.Component {\n  history = createHistory(this.props);\n\n  render() {\n    return <Router history={this.history} children={this.props.children} />;\n  }\n}\n\nif (__DEV__) {\n  MemoryRouter.propTypes = {\n    initialEntries: PropTypes.array,\n    initialIndex: PropTypes.number,\n    getUserConfirmation: PropTypes.func,\n    keyLength: PropTypes.number,\n    children: PropTypes.node\n  };\n\n  MemoryRouter.prototype.componentDidMount = function() {\n    warning(\n      !this.props.history,\n      \"<MemoryRouter> ignores the history prop. To use a custom history, \" +\n        \"use `import { Router }` instead of `import { MemoryRouter as Router }`.\"\n    );\n  };\n}\n\nexport default MemoryRouter;\n","import React from \"react\";\n\nclass Lifecycle extends React.Component {\n  componentDidMount() {\n    if (this.props.onMount) this.props.onMount.call(this, this);\n  }\n\n  componentDidUpdate(prevProps) {\n    if (this.props.onUpdate) this.props.onUpdate.call(this, this, prevProps);\n  }\n\n  componentWillUnmount() {\n    if (this.props.onUnmount) this.props.onUnmount.call(this, this);\n  }\n\n  render() {\n    return null;\n  }\n}\n\nexport default Lifecycle;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path) {\n  if (cache[path]) return cache[path];\n\n  const generator = pathToRegexp.compile(path);\n\n  if (cacheCount < cacheLimit) {\n    cache[path] = generator;\n    cacheCount++;\n  }\n\n  return generator;\n}\n\n/**\n * Public API for generating a URL pathname from a path and parameters.\n */\nfunction generatePath(path = \"/\", params = {}) {\n  return path === \"/\" ? path : compilePath(path)(params, { pretty: true });\n}\n\nexport default generatePath;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, locationsAreEqual } from \"history\";\nimport invariant from \"tiny-invariant\";\n\nimport Lifecycle from \"./Lifecycle.js\";\nimport RouterContext from \"./RouterContext.js\";\nimport generatePath from \"./generatePath.js\";\n\n/**\n * The public API for navigating programmatically with a component.\n */\nfunction Redirect({ computedMatch, to, push = false }) {\n  return (\n    <RouterContext.Consumer>\n      {context => {\n        invariant(context, \"You should not use <Redirect> outside a <Router>\");\n\n        const { history, staticContext } = context;\n\n        const method = push ? history.push : history.replace;\n        const location = createLocation(\n          computedMatch\n            ? typeof to === \"string\"\n              ? generatePath(to, computedMatch.params)\n              : {\n                  ...to,\n                  pathname: generatePath(to.pathname, computedMatch.params)\n                }\n            : to\n        );\n\n        // When rendering in a static context,\n        // set the new location immediately.\n        if (staticContext) {\n          method(location);\n          return null;\n        }\n\n        return (\n          <Lifecycle\n            onMount={() => {\n              method(location);\n            }}\n            onUpdate={(self, prevProps) => {\n              const prevLocation = createLocation(prevProps.to);\n              if (\n                !locationsAreEqual(prevLocation, {\n                  ...location,\n                  key: prevLocation.key\n                })\n              ) {\n                method(location);\n              }\n            }}\n            to={to}\n          />\n        );\n      }}\n    </RouterContext.Consumer>\n  );\n}\n\nif (__DEV__) {\n  Redirect.propTypes = {\n    push: PropTypes.bool,\n    from: PropTypes.string,\n    to: PropTypes.oneOfType([PropTypes.string, PropTypes.object]).isRequired\n  };\n}\n\nexport default Redirect;\n","import pathToRegexp from \"path-to-regexp\";\n\nconst cache = {};\nconst cacheLimit = 10000;\nlet cacheCount = 0;\n\nfunction compilePath(path, options) {\n  const cacheKey = `${options.end}${options.strict}${options.sensitive}`;\n  const pathCache = cache[cacheKey] || (cache[cacheKey] = {});\n\n  if (pathCache[path]) return pathCache[path];\n\n  const keys = [];\n  const regexp = pathToRegexp(path, keys, options);\n  const result = { regexp, keys };\n\n  if (cacheCount < cacheLimit) {\n    pathCache[path] = result;\n    cacheCount++;\n  }\n\n  return result;\n}\n\n/**\n * Public API for matching a URL pathname to a path.\n */\nfunction matchPath(pathname, options = {}) {\n  if (typeof options === \"string\" || Array.isArray(options)) {\n    options = { path: options };\n  }\n\n  const { path, exact = false, strict = false, sensitive = false } = options;\n\n  const paths = [].concat(path);\n\n  return paths.reduce((matched, path) => {\n    if (!path && path !== \"\") return null;\n    if (matched) return matched;\n\n    const { regexp, keys } = compilePath(path, {\n      end: exact,\n      strict,\n      sensitive\n    });\n    const match = regexp.exec(pathname);\n\n    if (!match) return null;\n\n    const [url, ...values] = match;\n    const isExact = pathname === url;\n\n    if (exact && !isExact) return null;\n\n    return {\n      path, // the path used to match\n      url: path === \"/\" && url === \"\" ? \"/\" : url, // the matched portion of the URL\n      isExact, // whether or not we matched exactly\n      params: keys.reduce((memo, key, index) => {\n        memo[key.name] = values[index];\n        return memo;\n      }, {})\n    };\n  }, null);\n}\n\nexport default matchPath;\n","import React from \"react\";\nimport { isValidElementType } from \"react-is\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext.js\";\nimport matchPath from \"./matchPath.js\";\n\nfunction isEmptyChildren(children) {\n  return React.Children.count(children) === 0;\n}\n\nfunction evalChildrenDev(children, props, path) {\n  const value = children(props);\n\n  warning(\n    value !== undefined,\n    \"You returned `undefined` from the `children` function of \" +\n      `<Route${path ? ` path=\"${path}\"` : \"\"}>, but you ` +\n      \"should have returned a React element or `null`\"\n  );\n\n  return value || null;\n}\n\n/**\n * The public API for matching a single path and rendering.\n */\nclass Route extends React.Component {\n  render() {\n    return (\n      <RouterContext.Consumer>\n        {context => {\n          invariant(context, \"You should not use <Route> outside a <Router>\");\n\n          const location = this.props.location || context.location;\n          const match = this.props.computedMatch\n            ? this.props.computedMatch // <Switch> already computed the match for us\n            : this.props.path\n            ? matchPath(location.pathname, this.props)\n            : context.match;\n\n          const props = { ...context, location, match };\n\n          let { children, component, render } = this.props;\n\n          // Preact uses an empty array as children by\n          // default, so use null if that's the case.\n          if (Array.isArray(children) && children.length === 0) {\n            children = null;\n          }\n\n          return (\n            <RouterContext.Provider value={props}>\n              {props.match\n                ? children\n                  ? typeof children === \"function\"\n                    ? __DEV__\n                      ? evalChildrenDev(children, props, this.props.path)\n                      : children(props)\n                    : children\n                  : component\n                  ? React.createElement(component, props)\n                  : render\n                  ? render(props)\n                  : null\n                : typeof children === \"function\"\n                ? __DEV__\n                  ? evalChildrenDev(children, props, this.props.path)\n                  : children(props)\n                : null}\n            </RouterContext.Provider>\n          );\n        }}\n      </RouterContext.Consumer>\n    );\n  }\n}\n\nif (__DEV__) {\n  Route.propTypes = {\n    children: PropTypes.oneOfType([PropTypes.func, PropTypes.node]),\n    component: (props, propName) => {\n      if (props[propName] && !isValidElementType(props[propName])) {\n        return new Error(\n          `Invalid prop 'component' supplied to 'Route': the prop is not a valid React component`\n        );\n      }\n    },\n    exact: PropTypes.bool,\n    location: PropTypes.object,\n    path: PropTypes.oneOfType([\n      PropTypes.string,\n      PropTypes.arrayOf(PropTypes.string)\n    ]),\n    render: PropTypes.func,\n    sensitive: PropTypes.bool,\n    strict: PropTypes.bool\n  };\n\n  Route.prototype.componentDidMount = function() {\n    warning(\n      !(\n        this.props.children &&\n        !isEmptyChildren(this.props.children) &&\n        this.props.component\n      ),\n      \"You should not use <Route component> and <Route children> in the same route; <Route component> will be ignored\"\n    );\n\n    warning(\n      !(\n        this.props.children &&\n        !isEmptyChildren(this.props.children) &&\n        this.props.render\n      ),\n      \"You should not use <Route render> and <Route children> in the same route; <Route render> will be ignored\"\n    );\n\n    warning(\n      !(this.props.component && this.props.render),\n      \"You should not use <Route component> and <Route render> in the same route; <Route render> will be ignored\"\n    );\n  };\n\n  Route.prototype.componentDidUpdate = function(prevProps) {\n    warning(\n      !(this.props.location && !prevProps.location),\n      '<Route> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n    );\n\n    warning(\n      !(!this.props.location && prevProps.location),\n      '<Route> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n    );\n  };\n}\n\nexport default Route;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport { createLocation, createPath } from \"history\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport Router from \"./Router.js\";\n\nfunction addLeadingSlash(path) {\n  return path.charAt(0) === \"/\" ? path : \"/\" + path;\n}\n\nfunction addBasename(basename, location) {\n  if (!basename) return location;\n\n  return {\n    ...location,\n    pathname: addLeadingSlash(basename) + location.pathname\n  };\n}\n\nfunction stripBasename(basename, location) {\n  if (!basename) return location;\n\n  const base = addLeadingSlash(basename);\n\n  if (location.pathname.indexOf(base) !== 0) return location;\n\n  return {\n    ...location,\n    pathname: location.pathname.substr(base.length)\n  };\n}\n\nfunction createURL(location) {\n  return typeof location === \"string\" ? location : createPath(location);\n}\n\nfunction staticHandler(methodName) {\n  return () => {\n    invariant(false, \"You cannot %s with <StaticRouter>\", methodName);\n  };\n}\n\nfunction noop() {}\n\n/**\n * The public top-level API for a \"static\" <Router>, so-called because it\n * can't actually change the current location. Instead, it just records\n * location changes in a context object. Useful mainly in testing and\n * server-rendering scenarios.\n */\nclass StaticRouter extends React.Component {\n  navigateTo(location, action) {\n    const { basename = \"\", context = {} } = this.props;\n    context.action = action;\n    context.location = addBasename(basename, createLocation(location));\n    context.url = createURL(context.location);\n  }\n\n  handlePush = location => this.navigateTo(location, \"PUSH\");\n  handleReplace = location => this.navigateTo(location, \"REPLACE\");\n  handleListen = () => noop;\n  handleBlock = () => noop;\n\n  render() {\n    const { basename = \"\", context = {}, location = \"/\", ...rest } = this.props;\n\n    const history = {\n      createHref: path => addLeadingSlash(basename + createURL(path)),\n      action: \"POP\",\n      location: stripBasename(basename, createLocation(location)),\n      push: this.handlePush,\n      replace: this.handleReplace,\n      go: staticHandler(\"go\"),\n      goBack: staticHandler(\"goBack\"),\n      goForward: staticHandler(\"goForward\"),\n      listen: this.handleListen,\n      block: this.handleBlock\n    };\n\n    return <Router {...rest} history={history} staticContext={context} />;\n  }\n}\n\nif (__DEV__) {\n  StaticRouter.propTypes = {\n    basename: PropTypes.string,\n    context: PropTypes.object,\n    location: PropTypes.oneOfType([PropTypes.string, PropTypes.object])\n  };\n\n  StaticRouter.prototype.componentDidMount = function() {\n    warning(\n      !this.props.history,\n      \"<StaticRouter> ignores the history prop. To use a custom history, \" +\n        \"use `import { Router }` instead of `import { StaticRouter as Router }`.\"\n    );\n  };\n}\n\nexport default StaticRouter;\n","import React from \"react\";\nimport PropTypes from \"prop-types\";\nimport invariant from \"tiny-invariant\";\nimport warning from \"tiny-warning\";\n\nimport RouterContext from \"./RouterContext.js\";\nimport matchPath from \"./matchPath.js\";\n\n/**\n * The public API for rendering the first <Route> that matches.\n */\nclass Switch extends React.Component {\n  render() {\n    return (\n      <RouterContext.Consumer>\n        {context => {\n          invariant(context, \"You should not use <Switch> outside a <Router>\");\n\n          const location = this.props.location || context.location;\n\n          let element, match;\n\n          // We use React.Children.forEach instead of React.Children.toArray().find()\n          // here because toArray adds keys to all child elements and we do not want\n          // to trigger an unmount/remount for two <Route>s that render the same\n          // component at different URLs.\n          React.Children.forEach(this.props.children, child => {\n            if (match == null && React.isValidElement(child)) {\n              element = child;\n\n              const path = child.props.path || child.props.from;\n\n              match = path\n                ? matchPath(location.pathname, { ...child.props, path })\n                : context.match;\n            }\n          });\n\n          return match\n            ? React.cloneElement(element, { location, computedMatch: match })\n            : null;\n        }}\n      </RouterContext.Consumer>\n    );\n  }\n}\n\nif (__DEV__) {\n  Switch.propTypes = {\n    children: PropTypes.node,\n    location: PropTypes.object\n  };\n\n  Switch.prototype.componentDidUpdate = function(prevProps) {\n    warning(\n      !(this.props.location && !prevProps.location),\n      '<Switch> elements should not change from uncontrolled to controlled (or vice versa). You initially used no \"location\" prop and then provided one on a subsequent render.'\n    );\n\n    warning(\n      !(!this.props.location && prevProps.location),\n      '<Switch> elements should not change from controlled to uncontrolled (or vice versa). You provided a \"location\" prop initially but omitted it on a subsequent render.'\n    );\n  };\n}\n\nexport default Switch;\n","import React from \"react\";\nimport invariant from \"tiny-invariant\";\n\nimport Context from \"./RouterContext.js\";\nimport HistoryContext from \"./HistoryContext.js\";\nimport matchPath from \"./matchPath.js\";\n\nconst useContext = React.useContext;\n\nexport function useHistory() {\n  if (__DEV__) {\n    invariant(\n      typeof useContext === \"function\",\n      \"You must use React >= 16.8 in order to use useHistory()\"\n    );\n  }\n\n  return useContext(HistoryContext);\n}\n\nexport function useLocation() {\n  if (__DEV__) {\n    invariant(\n      typeof useContext === \"function\",\n      \"You must use React >= 16.8 in order to use useLocation()\"\n    );\n  }\n\n  return useContext(Context).location;\n}\n\nexport function useParams() {\n  if (__DEV__) {\n    invariant(\n      typeof useContext === \"function\",\n      \"You must use React >= 16.8 in order to use useParams()\"\n    );\n  }\n\n  const match = useContext(Context).match;\n  return match ? match.params : {};\n}\n\nexport function useRouteMatch(path) {\n  if (__DEV__) {\n    invariant(\n      typeof useContext === \"function\",\n      \"You must use React >= 16.8 in order to use useRouteMatch()\"\n    );\n  }\n\n  const location = useLocation();\n  const match = useContext(Context).match;\n\n  return path ? matchPath(location.pathname, path) : match;\n}\n"],"sourceRoot":""}