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gatsby-plugin-transitions

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'use strict';

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

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

var React = require('react');
var React__default = _interopDefault(React);
var reactSpring = require('react-spring');
var gatsby = require('gatsby');

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

function ownKeys(object, enumerableOnly) {
  var keys = Object.keys(object);

  if (Object.getOwnPropertySymbols) {
    var symbols = Object.getOwnPropertySymbols(object);
    if (enumerableOnly) symbols = symbols.filter(function (sym) {
      return Object.getOwnPropertyDescriptor(object, sym).enumerable;
    });
    keys.push.apply(keys, symbols);
  }

  return keys;
}

function _objectSpread2(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {};

    if (i % 2) {
      ownKeys(Object(source), true).forEach(function (key) {
        _defineProperty(target, key, source[key]);
      });
    } else if (Object.getOwnPropertyDescriptors) {
      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
    } else {
      ownKeys(Object(source)).forEach(function (key) {
        Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
      });
    }
  }

  return target;
}

function _slicedToArray(arr, i) {
  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
}

function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
}

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) return _arrayLikeToArray(arr);
}

function _arrayWithHoles(arr) {
  if (Array.isArray(arr)) return arr;
}

function _iterableToArray(iter) {
  if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
}

function _iterableToArrayLimit(arr, i) {
  if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
  var _arr = [];
  var _n = true;
  var _d = false;
  var _e = undefined;

  try {
    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
      _arr.push(_s.value);

      if (i && _arr.length === i) break;
    }
  } catch (err) {
    _d = true;
    _e = err;
  } finally {
    try {
      if (!_n && _i["return"] != null) _i["return"]();
    } finally {
      if (_d) throw _e;
    }
  }

  return _arr;
}

function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return _arrayLikeToArray(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(o);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}

function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;

  for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

  return arr2;
}

function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}

function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

/** @license React v16.13.1
 * react-is.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
var b="function"===typeof Symbol&&Symbol.for,c=b?Symbol.for("react.element"):60103,d=b?Symbol.for("react.portal"):60106,e=b?Symbol.for("react.fragment"):60107,f=b?Symbol.for("react.strict_mode"):60108,g=b?Symbol.for("react.profiler"):60114,h=b?Symbol.for("react.provider"):60109,k=b?Symbol.for("react.context"):60110,l=b?Symbol.for("react.async_mode"):60111,m=b?Symbol.for("react.concurrent_mode"):60111,n=b?Symbol.for("react.forward_ref"):60112,p=b?Symbol.for("react.suspense"):60113,q=b?
Symbol.for("react.suspense_list"):60120,r=b?Symbol.for("react.memo"):60115,t=b?Symbol.for("react.lazy"):60116,v=b?Symbol.for("react.block"):60121,w=b?Symbol.for("react.fundamental"):60117,x=b?Symbol.for("react.responder"):60118,y=b?Symbol.for("react.scope"):60119;
function z(a){if("object"===typeof a&&null!==a){var u=a.$$typeof;switch(u){case c:switch(a=a.type,a){case l:case m:case e:case g:case f:case p:return a;default:switch(a=a&&a.$$typeof,a){case k:case n:case t:case r:case h:return a;default:return u}}case d:return u}}}function A(a){return z(a)===m}var AsyncMode=l;var ConcurrentMode=m;var ContextConsumer=k;var ContextProvider=h;var Element=c;var ForwardRef=n;var Fragment=e;var Lazy=t;var Memo=r;var Portal=d;
var Profiler=g;var StrictMode=f;var Suspense=p;var isAsyncMode=function(a){return A(a)||z(a)===l};var isConcurrentMode=A;var isContextConsumer=function(a){return z(a)===k};var isContextProvider=function(a){return z(a)===h};var isElement=function(a){return "object"===typeof a&&null!==a&&a.$$typeof===c};var isForwardRef=function(a){return z(a)===n};var isFragment=function(a){return z(a)===e};var isLazy=function(a){return z(a)===t};
var isMemo=function(a){return z(a)===r};var isPortal=function(a){return z(a)===d};var isProfiler=function(a){return z(a)===g};var isStrictMode=function(a){return z(a)===f};var isSuspense=function(a){return z(a)===p};
var isValidElementType=function(a){return "string"===typeof a||"function"===typeof a||a===e||a===m||a===g||a===f||a===p||a===q||"object"===typeof a&&null!==a&&(a.$$typeof===t||a.$$typeof===r||a.$$typeof===h||a.$$typeof===k||a.$$typeof===n||a.$$typeof===w||a.$$typeof===x||a.$$typeof===y||a.$$typeof===v)};var typeOf=z;

var reactIs_production_min = {
	AsyncMode: AsyncMode,
	ConcurrentMode: ConcurrentMode,
	ContextConsumer: ContextConsumer,
	ContextProvider: ContextProvider,
	Element: Element,
	ForwardRef: ForwardRef,
	Fragment: Fragment,
	Lazy: Lazy,
	Memo: Memo,
	Portal: Portal,
	Profiler: Profiler,
	StrictMode: StrictMode,
	Suspense: Suspense,
	isAsyncMode: isAsyncMode,
	isConcurrentMode: isConcurrentMode,
	isContextConsumer: isContextConsumer,
	isContextProvider: isContextProvider,
	isElement: isElement,
	isForwardRef: isForwardRef,
	isFragment: isFragment,
	isLazy: isLazy,
	isMemo: isMemo,
	isPortal: isPortal,
	isProfiler: isProfiler,
	isStrictMode: isStrictMode,
	isSuspense: isSuspense,
	isValidElementType: isValidElementType,
	typeOf: typeOf
};

var reactIs_development = createCommonjsModule(function (module, exports) {



if (process.env.NODE_ENV !== "production") {
  (function() {

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;
var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;
var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;
var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;
var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;
var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;
var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
// (unstable) APIs that have been removed. Can we remove the symbols?

var REACT_ASYNC_MODE_TYPE = hasSymbol ? Symbol.for('react.async_mode') : 0xeacf;
var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;
var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;
var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;
var REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;
var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
var REACT_BLOCK_TYPE = hasSymbol ? Symbol.for('react.block') : 0xead9;
var REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;
var REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;
var REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;

function isValidElementType(type) {
  return typeof type === 'string' || typeof type === 'function' || // Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.
  type === REACT_FRAGMENT_TYPE || type === REACT_CONCURRENT_MODE_TYPE || type === REACT_PROFILER_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || typeof type === 'object' && type !== null && (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_RESPONDER_TYPE || type.$$typeof === REACT_SCOPE_TYPE || type.$$typeof === REACT_BLOCK_TYPE);
}

function typeOf(object) {
  if (typeof object === 'object' && object !== null) {
    var $$typeof = object.$$typeof;

    switch ($$typeof) {
      case REACT_ELEMENT_TYPE:
        var type = object.type;

        switch (type) {
          case REACT_ASYNC_MODE_TYPE:
          case REACT_CONCURRENT_MODE_TYPE:
          case REACT_FRAGMENT_TYPE:
          case REACT_PROFILER_TYPE:
          case REACT_STRICT_MODE_TYPE:
          case REACT_SUSPENSE_TYPE:
            return type;

          default:
            var $$typeofType = type && type.$$typeof;

            switch ($$typeofType) {
              case REACT_CONTEXT_TYPE:
              case REACT_FORWARD_REF_TYPE:
              case REACT_LAZY_TYPE:
              case REACT_MEMO_TYPE:
              case REACT_PROVIDER_TYPE:
                return $$typeofType;

              default:
                return $$typeof;
            }

        }

      case REACT_PORTAL_TYPE:
        return $$typeof;
    }
  }

  return undefined;
} // AsyncMode is deprecated along with isAsyncMode

var AsyncMode = REACT_ASYNC_MODE_TYPE;
var ConcurrentMode = REACT_CONCURRENT_MODE_TYPE;
var ContextConsumer = REACT_CONTEXT_TYPE;
var ContextProvider = REACT_PROVIDER_TYPE;
var Element = REACT_ELEMENT_TYPE;
var ForwardRef = REACT_FORWARD_REF_TYPE;
var Fragment = REACT_FRAGMENT_TYPE;
var Lazy = REACT_LAZY_TYPE;
var Memo = REACT_MEMO_TYPE;
var Portal = REACT_PORTAL_TYPE;
var Profiler = REACT_PROFILER_TYPE;
var StrictMode = REACT_STRICT_MODE_TYPE;
var Suspense = REACT_SUSPENSE_TYPE;
var hasWarnedAboutDeprecatedIsAsyncMode = false; // AsyncMode should be deprecated

function isAsyncMode(object) {
  {
    if (!hasWarnedAboutDeprecatedIsAsyncMode) {
      hasWarnedAboutDeprecatedIsAsyncMode = true; // Using console['warn'] to evade Babel and ESLint

      console['warn']('The ReactIs.isAsyncMode() alias has been deprecated, ' + 'and will be removed in React 17+. Update your code to use ' + 'ReactIs.isConcurrentMode() instead. It has the exact same API.');
    }
  }

  return isConcurrentMode(object) || typeOf(object) === REACT_ASYNC_MODE_TYPE;
}
function isConcurrentMode(object) {
  return typeOf(object) === REACT_CONCURRENT_MODE_TYPE;
}
function isContextConsumer(object) {
  return typeOf(object) === REACT_CONTEXT_TYPE;
}
function isContextProvider(object) {
  return typeOf(object) === REACT_PROVIDER_TYPE;
}
function isElement(object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
}
function isForwardRef(object) {
  return typeOf(object) === REACT_FORWARD_REF_TYPE;
}
function isFragment(object) {
  return typeOf(object) === REACT_FRAGMENT_TYPE;
}
function isLazy(object) {
  return typeOf(object) === REACT_LAZY_TYPE;
}
function isMemo(object) {
  return typeOf(object) === REACT_MEMO_TYPE;
}
function isPortal(object) {
  return typeOf(object) === REACT_PORTAL_TYPE;
}
function isProfiler(object) {
  return typeOf(object) === REACT_PROFILER_TYPE;
}
function isStrictMode(object) {
  return typeOf(object) === REACT_STRICT_MODE_TYPE;
}
function isSuspense(object) {
  return typeOf(object) === REACT_SUSPENSE_TYPE;
}

exports.AsyncMode = AsyncMode;
exports.ConcurrentMode = ConcurrentMode;
exports.ContextConsumer = ContextConsumer;
exports.ContextProvider = ContextProvider;
exports.Element = Element;
exports.ForwardRef = ForwardRef;
exports.Fragment = Fragment;
exports.Lazy = Lazy;
exports.Memo = Memo;
exports.Portal = Portal;
exports.Profiler = Profiler;
exports.StrictMode = StrictMode;
exports.Suspense = Suspense;
exports.isAsyncMode = isAsyncMode;
exports.isConcurrentMode = isConcurrentMode;
exports.isContextConsumer = isContextConsumer;
exports.isContextProvider = isContextProvider;
exports.isElement = isElement;
exports.isForwardRef = isForwardRef;
exports.isFragment = isFragment;
exports.isLazy = isLazy;
exports.isMemo = isMemo;
exports.isPortal = isPortal;
exports.isProfiler = isProfiler;
exports.isStrictMode = isStrictMode;
exports.isSuspense = isSuspense;
exports.isValidElementType = isValidElementType;
exports.typeOf = typeOf;
  })();
}
});
var reactIs_development_1 = reactIs_development.AsyncMode;
var reactIs_development_2 = reactIs_development.ConcurrentMode;
var reactIs_development_3 = reactIs_development.ContextConsumer;
var reactIs_development_4 = reactIs_development.ContextProvider;
var reactIs_development_5 = reactIs_development.Element;
var reactIs_development_6 = reactIs_development.ForwardRef;
var reactIs_development_7 = reactIs_development.Fragment;
var reactIs_development_8 = reactIs_development.Lazy;
var reactIs_development_9 = reactIs_development.Memo;
var reactIs_development_10 = reactIs_development.Portal;
var reactIs_development_11 = reactIs_development.Profiler;
var reactIs_development_12 = reactIs_development.StrictMode;
var reactIs_development_13 = reactIs_development.Suspense;
var reactIs_development_14 = reactIs_development.isAsyncMode;
var reactIs_development_15 = reactIs_development.isConcurrentMode;
var reactIs_development_16 = reactIs_development.isContextConsumer;
var reactIs_development_17 = reactIs_development.isContextProvider;
var reactIs_development_18 = reactIs_development.isElement;
var reactIs_development_19 = reactIs_development.isForwardRef;
var reactIs_development_20 = reactIs_development.isFragment;
var reactIs_development_21 = reactIs_development.isLazy;
var reactIs_development_22 = reactIs_development.isMemo;
var reactIs_development_23 = reactIs_development.isPortal;
var reactIs_development_24 = reactIs_development.isProfiler;
var reactIs_development_25 = reactIs_development.isStrictMode;
var reactIs_development_26 = reactIs_development.isSuspense;
var reactIs_development_27 = reactIs_development.isValidElementType;
var reactIs_development_28 = reactIs_development.typeOf;

var reactIs = createCommonjsModule(function (module) {

if (process.env.NODE_ENV === 'production') {
  module.exports = reactIs_production_min;
} else {
  module.exports = reactIs_development;
}
});

/*
object-assign
(c) Sindre Sorhus
@license MIT
*/
/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function shouldUseNative() {
	try {
		if (!Object.assign) {
			return false;
		}

		// Detect buggy property enumeration order in older V8 versions.

		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
		test1[5] = 'de';
		if (Object.getOwnPropertyNames(test1)[0] === '5') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test2 = {};
		for (var i = 0; i < 10; i++) {
			test2['_' + String.fromCharCode(i)] = i;
		}
		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
			return test2[n];
		});
		if (order2.join('') !== '0123456789') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test3 = {};
		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
			test3[letter] = letter;
		});
		if (Object.keys(Object.assign({}, test3)).join('') !==
				'abcdefghijklmnopqrst') {
			return false;
		}

		return true;
	} catch (err) {
		// We don't expect any of the above to throw, but better to be safe.
		return false;
	}
}

var objectAssign = shouldUseNative() ? Object.assign : function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (getOwnPropertySymbols) {
			symbols = getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

var ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';

var ReactPropTypesSecret_1 = ReactPropTypesSecret;

var printWarning = function() {};

if (process.env.NODE_ENV !== 'production') {
  var ReactPropTypesSecret$1 = ReactPropTypesSecret_1;
  var loggedTypeFailures = {};
  var has = Function.call.bind(Object.prototype.hasOwnProperty);

  printWarning = function(text) {
    var message = 'Warning: ' + text;
    if (typeof console !== 'undefined') {
      console.error(message);
    }
    try {
      // --- Welcome to debugging React ---
      // 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) {}
  };
}

/**
 * Assert that the values match with the type specs.
 * Error messages are memorized and will only be shown once.
 *
 * @param {object} typeSpecs Map of name to a ReactPropType
 * @param {object} values Runtime values that need to be type-checked
 * @param {string} location e.g. "prop", "context", "child context"
 * @param {string} componentName Name of the component for error messages.
 * @param {?Function} getStack Returns the component stack.
 * @private
 */
function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
  if (process.env.NODE_ENV !== 'production') {
    for (var typeSpecName in typeSpecs) {
      if (has(typeSpecs, typeSpecName)) {
        var error;
        // Prop type validation may throw. In case they do, we don't want to
        // fail the render phase where it didn't fail before. So we log it.
        // After these have been cleaned up, we'll let them throw.
        try {
          // This is intentionally an invariant that gets caught. It's the same
          // behavior as without this statement except with a better message.
          if (typeof typeSpecs[typeSpecName] !== 'function') {
            var err = Error(
              (componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' +
              'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.'
            );
            err.name = 'Invariant Violation';
            throw err;
          }
          error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret$1);
        } catch (ex) {
          error = ex;
        }
        if (error && !(error instanceof Error)) {
          printWarning(
            (componentName || 'React class') + ': type specification of ' +
            location + ' `' + typeSpecName + '` is invalid; the type checker ' +
            'function must return `null` or an `Error` but returned a ' + typeof error + '. ' +
            'You may have forgotten to pass an argument to the type checker ' +
            'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' +
            'shape all require an argument).'
          );
        }
        if (error instanceof Error && !(error.message in loggedTypeFailures)) {
          // Only monitor this failure once because there tends to be a lot of the
          // same error.
          loggedTypeFailures[error.message] = true;

          var stack = getStack ? getStack() : '';

          printWarning(
            'Failed ' + location + ' type: ' + error.message + (stack != null ? stack : '')
          );
        }
      }
    }
  }
}

/**
 * Resets warning cache when testing.
 *
 * @private
 */
checkPropTypes.resetWarningCache = function() {
  if (process.env.NODE_ENV !== 'production') {
    loggedTypeFailures = {};
  }
};

var checkPropTypes_1 = checkPropTypes;

var has$1 = Function.call.bind(Object.prototype.hasOwnProperty);
var printWarning$1 = function() {};

if (process.env.NODE_ENV !== 'production') {
  printWarning$1 = function(text) {
    var message = 'Warning: ' + text;
    if (typeof console !== 'undefined') {
      console.error(message);
    }
    try {
      // --- Welcome to debugging React ---
      // 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) {}
  };
}

function emptyFunctionThatReturnsNull() {
  return null;
}

var factoryWithTypeCheckers = function(isValidElement, throwOnDirectAccess) {
  /* global Symbol */
  var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
  var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.

  /**
   * Returns the iterator method function contained on the iterable object.
   *
   * Be sure to invoke the function with the iterable as context:
   *
   *     var iteratorFn = getIteratorFn(myIterable);
   *     if (iteratorFn) {
   *       var iterator = iteratorFn.call(myIterable);
   *       ...
   *     }
   *
   * @param {?object} maybeIterable
   * @return {?function}
   */
  function getIteratorFn(maybeIterable) {
    var iteratorFn = maybeIterable && (ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL]);
    if (typeof iteratorFn === 'function') {
      return iteratorFn;
    }
  }

  /**
   * Collection of methods that allow declaration and validation of props that are
   * supplied to React components. Example usage:
   *
   *   var Props = require('ReactPropTypes');
   *   var MyArticle = React.createClass({
   *     propTypes: {
   *       // An optional string prop named "description".
   *       description: Props.string,
   *
   *       // A required enum prop named "category".
   *       category: Props.oneOf(['News','Photos']).isRequired,
   *
   *       // A prop named "dialog" that requires an instance of Dialog.
   *       dialog: Props.instanceOf(Dialog).isRequired
   *     },
   *     render: function() { ... }
   *   });
   *
   * A more formal specification of how these methods are used:
   *
   *   type := array|bool|func|object|number|string|oneOf([...])|instanceOf(...)
   *   decl := ReactPropTypes.{type}(.isRequired)?
   *
   * Each and every declaration produces a function with the same signature. This
   * allows the creation of custom validation functions. For example:
   *
   *  var MyLink = React.createClass({
   *    propTypes: {
   *      // An optional string or URI prop named "href".
   *      href: function(props, propName, componentName) {
   *        var propValue = props[propName];
   *        if (propValue != null && typeof propValue !== 'string' &&
   *            !(propValue instanceof URI)) {
   *          return new Error(
   *            'Expected a string or an URI for ' + propName + ' in ' +
   *            componentName
   *          );
   *        }
   *      }
   *    },
   *    render: function() {...}
   *  });
   *
   * @internal
   */

  var ANONYMOUS = '<<anonymous>>';

  // Important!
  // Keep this list in sync with production version in `./factoryWithThrowingShims.js`.
  var ReactPropTypes = {
    array: createPrimitiveTypeChecker('array'),
    bool: createPrimitiveTypeChecker('boolean'),
    func: createPrimitiveTypeChecker('function'),
    number: createPrimitiveTypeChecker('number'),
    object: createPrimitiveTypeChecker('object'),
    string: createPrimitiveTypeChecker('string'),
    symbol: createPrimitiveTypeChecker('symbol'),

    any: createAnyTypeChecker(),
    arrayOf: createArrayOfTypeChecker,
    element: createElementTypeChecker(),
    elementType: createElementTypeTypeChecker(),
    instanceOf: createInstanceTypeChecker,
    node: createNodeChecker(),
    objectOf: createObjectOfTypeChecker,
    oneOf: createEnumTypeChecker,
    oneOfType: createUnionTypeChecker,
    shape: createShapeTypeChecker,
    exact: createStrictShapeTypeChecker,
  };

  /**
   * inlined Object.is polyfill to avoid requiring consumers ship their own
   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
   */
  /*eslint-disable no-self-compare*/
  function is(x, y) {
    // SameValue algorithm
    if (x === y) {
      // Steps 1-5, 7-10
      // Steps 6.b-6.e: +0 != -0
      return x !== 0 || 1 / x === 1 / y;
    } else {
      // Step 6.a: NaN == NaN
      return x !== x && y !== y;
    }
  }
  /*eslint-enable no-self-compare*/

  /**
   * We use an Error-like object for backward compatibility as people may call
   * PropTypes directly and inspect their output. However, we don't use real
   * Errors anymore. We don't inspect their stack anyway, and creating them
   * is prohibitively expensive if they are created too often, such as what
   * happens in oneOfType() for any type before the one that matched.
   */
  function PropTypeError(message) {
    this.message = message;
    this.stack = '';
  }
  // Make `instanceof Error` still work for returned errors.
  PropTypeError.prototype = Error.prototype;

  function createChainableTypeChecker(validate) {
    if (process.env.NODE_ENV !== 'production') {
      var manualPropTypeCallCache = {};
      var manualPropTypeWarningCount = 0;
    }
    function checkType(isRequired, props, propName, componentName, location, propFullName, secret) {
      componentName = componentName || ANONYMOUS;
      propFullName = propFullName || propName;

      if (secret !== ReactPropTypesSecret_1) {
        if (throwOnDirectAccess) {
          // New behavior only for users of `prop-types` package
          var err = new Error(
            'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
            'Use `PropTypes.checkPropTypes()` to call them. ' +
            'Read more at http://fb.me/use-check-prop-types'
          );
          err.name = 'Invariant Violation';
          throw err;
        } else if (process.env.NODE_ENV !== 'production' && typeof console !== 'undefined') {
          // Old behavior for people using React.PropTypes
          var cacheKey = componentName + ':' + propName;
          if (
            !manualPropTypeCallCache[cacheKey] &&
            // Avoid spamming the console because they are often not actionable except for lib authors
            manualPropTypeWarningCount < 3
          ) {
            printWarning$1(
              'You are manually calling a React.PropTypes validation ' +
              'function for the `' + propFullName + '` prop on `' + componentName  + '`. This is deprecated ' +
              'and will throw in the standalone `prop-types` package. ' +
              'You may be seeing this warning due to a third-party PropTypes ' +
              'library. See https://fb.me/react-warning-dont-call-proptypes ' + 'for details.'
            );
            manualPropTypeCallCache[cacheKey] = true;
            manualPropTypeWarningCount++;
          }
        }
      }
      if (props[propName] == null) {
        if (isRequired) {
          if (props[propName] === null) {
            return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required ' + ('in `' + componentName + '`, but its value is `null`.'));
          }
          return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required in ' + ('`' + componentName + '`, but its value is `undefined`.'));
        }
        return null;
      } else {
        return validate(props, propName, componentName, location, propFullName);
      }
    }

    var chainedCheckType = checkType.bind(null, false);
    chainedCheckType.isRequired = checkType.bind(null, true);

    return chainedCheckType;
  }

  function createPrimitiveTypeChecker(expectedType) {
    function validate(props, propName, componentName, location, propFullName, secret) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== expectedType) {
        // `propValue` being instance of, say, date/regexp, pass the 'object'
        // check, but we can offer a more precise error message here rather than
        // 'of type `object`'.
        var preciseType = getPreciseType(propValue);

        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + preciseType + '` supplied to `' + componentName + '`, expected ') + ('`' + expectedType + '`.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createAnyTypeChecker() {
    return createChainableTypeChecker(emptyFunctionThatReturnsNull);
  }

  function createArrayOfTypeChecker(typeChecker) {
    function validate(props, propName, componentName, location, propFullName) {
      if (typeof typeChecker !== 'function') {
        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside arrayOf.');
      }
      var propValue = props[propName];
      if (!Array.isArray(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an array.'));
      }
      for (var i = 0; i < propValue.length; i++) {
        var error = typeChecker(propValue, i, componentName, location, propFullName + '[' + i + ']', ReactPropTypesSecret_1);
        if (error instanceof Error) {
          return error;
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createElementTypeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      if (!isValidElement(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createElementTypeTypeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      if (!reactIs.isValidElementType(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement type.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createInstanceTypeChecker(expectedClass) {
    function validate(props, propName, componentName, location, propFullName) {
      if (!(props[propName] instanceof expectedClass)) {
        var expectedClassName = expectedClass.name || ANONYMOUS;
        var actualClassName = getClassName(props[propName]);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + actualClassName + '` supplied to `' + componentName + '`, expected ') + ('instance of `' + expectedClassName + '`.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createEnumTypeChecker(expectedValues) {
    if (!Array.isArray(expectedValues)) {
      if (process.env.NODE_ENV !== 'production') {
        if (arguments.length > 1) {
          printWarning$1(
            'Invalid arguments supplied to oneOf, expected an array, got ' + arguments.length + ' arguments. ' +
            'A common mistake is to write oneOf(x, y, z) instead of oneOf([x, y, z]).'
          );
        } else {
          printWarning$1('Invalid argument supplied to oneOf, expected an array.');
        }
      }
      return emptyFunctionThatReturnsNull;
    }

    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      for (var i = 0; i < expectedValues.length; i++) {
        if (is(propValue, expectedValues[i])) {
          return null;
        }
      }

      var valuesString = JSON.stringify(expectedValues, function replacer(key, value) {
        var type = getPreciseType(value);
        if (type === 'symbol') {
          return String(value);
        }
        return value;
      });
      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of value `' + String(propValue) + '` ' + ('supplied to `' + componentName + '`, expected one of ' + valuesString + '.'));
    }
    return createChainableTypeChecker(validate);
  }

  function createObjectOfTypeChecker(typeChecker) {
    function validate(props, propName, componentName, location, propFullName) {
      if (typeof typeChecker !== 'function') {
        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside objectOf.');
      }
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an object.'));
      }
      for (var key in propValue) {
        if (has$1(propValue, key)) {
          var error = typeChecker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
          if (error instanceof Error) {
            return error;
          }
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createUnionTypeChecker(arrayOfTypeCheckers) {
    if (!Array.isArray(arrayOfTypeCheckers)) {
      process.env.NODE_ENV !== 'production' ? printWarning$1('Invalid argument supplied to oneOfType, expected an instance of array.') : void 0;
      return emptyFunctionThatReturnsNull;
    }

    for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
      var checker = arrayOfTypeCheckers[i];
      if (typeof checker !== 'function') {
        printWarning$1(
          'Invalid argument supplied to oneOfType. Expected an array of check functions, but ' +
          'received ' + getPostfixForTypeWarning(checker) + ' at index ' + i + '.'
        );
        return emptyFunctionThatReturnsNull;
      }
    }

    function validate(props, propName, componentName, location, propFullName) {
      for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
        var checker = arrayOfTypeCheckers[i];
        if (checker(props, propName, componentName, location, propFullName, ReactPropTypesSecret_1) == null) {
          return null;
        }
      }

      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`.'));
    }
    return createChainableTypeChecker(validate);
  }

  function createNodeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      if (!isNode(props[propName])) {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`, expected a ReactNode.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createShapeTypeChecker(shapeTypes) {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
      }
      for (var key in shapeTypes) {
        var checker = shapeTypes[key];
        if (!checker) {
          continue;
        }
        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
        if (error) {
          return error;
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createStrictShapeTypeChecker(shapeTypes) {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
      }
      // We need to check all keys in case some are required but missing from
      // props.
      var allKeys = objectAssign({}, props[propName], shapeTypes);
      for (var key in allKeys) {
        var checker = shapeTypes[key];
        if (!checker) {
          return new PropTypeError(
            'Invalid ' + location + ' `' + propFullName + '` key `' + key + '` supplied to `' + componentName + '`.' +
            '\nBad object: ' + JSON.stringify(props[propName], null, '  ') +
            '\nValid keys: ' +  JSON.stringify(Object.keys(shapeTypes), null, '  ')
          );
        }
        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret_1);
        if (error) {
          return error;
        }
      }
      return null;
    }

    return createChainableTypeChecker(validate);
  }

  function isNode(propValue) {
    switch (typeof propValue) {
      case 'number':
      case 'string':
      case 'undefined':
        return true;
      case 'boolean':
        return !propValue;
      case 'object':
        if (Array.isArray(propValue)) {
          return propValue.every(isNode);
        }
        if (propValue === null || isValidElement(propValue)) {
          return true;
        }

        var iteratorFn = getIteratorFn(propValue);
        if (iteratorFn) {
          var iterator = iteratorFn.call(propValue);
          var step;
          if (iteratorFn !== propValue.entries) {
            while (!(step = iterator.next()).done) {
              if (!isNode(step.value)) {
                return false;
              }
            }
          } else {
            // Iterator will provide entry [k,v] tuples rather than values.
            while (!(step = iterator.next()).done) {
              var entry = step.value;
              if (entry) {
                if (!isNode(entry[1])) {
                  return false;
                }
              }
            }
          }
        } else {
          return false;
        }

        return true;
      default:
        return false;
    }
  }

  function isSymbol(propType, propValue) {
    // Native Symbol.
    if (propType === 'symbol') {
      return true;
    }

    // falsy value can't be a Symbol
    if (!propValue) {
      return false;
    }

    // 19.4.3.5 Symbol.prototype[@@toStringTag] === 'Symbol'
    if (propValue['@@toStringTag'] === 'Symbol') {
      return true;
    }

    // Fallback for non-spec compliant Symbols which are polyfilled.
    if (typeof Symbol === 'function' && propValue instanceof Symbol) {
      return true;
    }

    return false;
  }

  // Equivalent of `typeof` but with special handling for array and regexp.
  function getPropType(propValue) {
    var propType = typeof propValue;
    if (Array.isArray(propValue)) {
      return 'array';
    }
    if (propValue instanceof RegExp) {
      // Old webkits (at least until Android 4.0) return 'function' rather than
      // 'object' for typeof a RegExp. We'll normalize this here so that /bla/
      // passes PropTypes.object.
      return 'object';
    }
    if (isSymbol(propType, propValue)) {
      return 'symbol';
    }
    return propType;
  }

  // This handles more types than `getPropType`. Only used for error messages.
  // See `createPrimitiveTypeChecker`.
  function getPreciseType(propValue) {
    if (typeof propValue === 'undefined' || propValue === null) {
      return '' + propValue;
    }
    var propType = getPropType(propValue);
    if (propType === 'object') {
      if (propValue instanceof Date) {
        return 'date';
      } else if (propValue instanceof RegExp) {
        return 'regexp';
      }
    }
    return propType;
  }

  // Returns a string that is postfixed to a warning about an invalid type.
  // For example, "undefined" or "of type array"
  function getPostfixForTypeWarning(value) {
    var type = getPreciseType(value);
    switch (type) {
      case 'array':
      case 'object':
        return 'an ' + type;
      case 'boolean':
      case 'date':
      case 'regexp':
        return 'a ' + type;
      default:
        return type;
    }
  }

  // Returns class name of the object, if any.
  function getClassName(propValue) {
    if (!propValue.constructor || !propValue.constructor.name) {
      return ANONYMOUS;
    }
    return propValue.constructor.name;
  }

  ReactPropTypes.checkPropTypes = checkPropTypes_1;
  ReactPropTypes.resetWarningCache = checkPropTypes_1.resetWarningCache;
  ReactPropTypes.PropTypes = ReactPropTypes;

  return ReactPropTypes;
};

function emptyFunction() {}
function emptyFunctionWithReset() {}
emptyFunctionWithReset.resetWarningCache = emptyFunction;

var factoryWithThrowingShims = function() {
  function shim(props, propName, componentName, location, propFullName, secret) {
    if (secret === ReactPropTypesSecret_1) {
      // It is still safe when called from React.
      return;
    }
    var err = new Error(
      'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
      'Use PropTypes.checkPropTypes() to call them. ' +
      'Read more at http://fb.me/use-check-prop-types'
    );
    err.name = 'Invariant Violation';
    throw err;
  }  shim.isRequired = shim;
  function getShim() {
    return shim;
  }  // Important!
  // Keep this list in sync with production version in `./factoryWithTypeCheckers.js`.
  var ReactPropTypes = {
    array: shim,
    bool: shim,
    func: shim,
    number: shim,
    object: shim,
    string: shim,
    symbol: shim,

    any: shim,
    arrayOf: getShim,
    element: shim,
    elementType: shim,
    instanceOf: getShim,
    node: shim,
    objectOf: getShim,
    oneOf: getShim,
    oneOfType: getShim,
    shape: getShim,
    exact: getShim,

    checkPropTypes: emptyFunctionWithReset,
    resetWarningCache: emptyFunction
  };

  ReactPropTypes.PropTypes = ReactPropTypes;

  return ReactPropTypes;
};

var propTypes = createCommonjsModule(function (module) {
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

if (process.env.NODE_ENV !== 'production') {
  var ReactIs = reactIs;

  // By explicitly using `prop-types` you are opting into new development behavior.
  // http://fb.me/prop-types-in-prod
  var throwOnDirectAccess = true;
  module.exports = factoryWithTypeCheckers(ReactIs.isElement, throwOnDirectAccess);
} else {
  // By explicitly using `prop-types` you are opting into new production behavior.
  // http://fb.me/prop-types-in-prod
  module.exports = factoryWithThrowingShims();
}
});

function getConfig(springConfig) {
  if (typeof reactSpring.config === 'string') {
    return reactSpring.config.springConfig || {};
  }

  return springConfig || {};
}

function getCallback(callback) {
  if (typeof callback === 'function') return callback;
  return null;
}

function getOpacity(opacity) {
  if (typeof opacity === 'number' && opacity >= 0) return opacity;
  return 1;
}

function getTransform(transform) {
  if (transform && typeof transform === 'string') return transform;
  return 'none';
}

function validateSpring(spring) {
  return {
    opacity: getOpacity(spring.opacity),
    transform: getTransform(spring.transform),
    config: getConfig(spring.config),
    onStart: getCallback(spring.onStart),
    onFrame: getCallback(spring.onFrame),
    onRest: getCallback(spring.onRest)
  };
}

function getY(key) {
  var scroll = window.sessionStorage.getItem("@@scroll|".concat(key));
  var scrollArray = JSON.parse(scroll);
  if (!scrollArray) return 0;
  return scrollArray[1];
}

function filterViews(views) {
  return views.filter(function (view) {
    return view;
  });
}

var reducer = (function (state, action) {
  switch (action.type) {
    case 'NAVIGATE':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        to: action.to,
        enterInterim: action.enter && validateSpring(action.enter),
        usualInterim: action.usual && validateSpring(action.usual),
        leaveInterim: action.leave && validateSpring(action.leave),
        modeInterim: action.mode,
        keepInterim: action.keep,
        y: action.y
      });

    case 'UPDATE_LOCATION':
      var locationScrollY = getY(action.location.key);
      return _objectSpread2(_objectSpread2({}, state), {}, {
        to: undefined,
        y: undefined,
        enterInterim: null,
        usualInterim: null,
        leaveInterim: null,
        modeInterim: '',
        currentLocation: _objectSpread2(_objectSpread2({}, action.location), {}, {
          skipAnimations: locationScrollY && window.safari,
          enter: state.enterInterim,
          usual: state.usualInterim,
          leave: state.leaveInterim,
          y: state.y || locationScrollY || 0,
          mode: state.modeInterim
        }),
        prevLocation: _objectSpread2(_objectSpread2({}, state.currentLocation), {}, {
          y: state.currentLocation && getY(state.currentLocation.key)
        }),
        views: [null].concat(_toConsumableArray(filterViews(state.views))),
        keep: state.keepInterim ? _objectSpread2(_objectSpread2({}, state.views[0]), {}, {
          y: state.currentLocation && getY(state.currentLocation.key)
        }) : state.keep,
        keepInterim: false,
        hasEntered: false
      });

    case 'ADD_QUEUE':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        queue: action.view
      });

    case 'REMOVE_VIEW':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        views: state.views.filter(function (view) {
          if (view && view.props.location.key === action.locationKey) return false;
          return true;
        })
      });

    case 'ADD_VIEW_FROM_QUEUE':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        views: [state.queue].concat(_toConsumableArray(filterViews(state.views))),
        queue: null
      });

    case 'ADD_VIEW_DIRECTLY':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        views: [action.view].concat(_toConsumableArray(filterViews(state.views))),
        queue: null
      });

    case 'UPDATE_MODE':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        mode: action.mode
      });

    case 'HAS_ENTERED':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        hasEntered: true
      });

    case 'REMOVE_KEEP':
      return _objectSpread2(_objectSpread2({}, state), {}, {
        keep: null
      });

    default:
      return state;
  }
});

var TransitionContext = /*#__PURE__*/React.createContext();

var TransitionProvider = function TransitionProvider(props) {
  var _useReducer = React.useReducer(reducer, {
    currentLocation: {
      key: undefined
    },
    prevLocation: null,
    views: [],
    queue: null,
    mode: props.mode,
    enter: validateSpring(props.enter),
    usual: validateSpring(props.usual),
    leave: validateSpring(props.leave),
    hasEntered: false
  }),
      _useReducer2 = _slicedToArray(_useReducer, 2),
      state = _useReducer2[0],
      dispatch = _useReducer2[1];

  React.useEffect(function () {
    dispatch({
      type: 'UPDATE_MODE',
      mode: props.mode
    });
  }, [props.mode]);
  React.useEffect(function () {
    dispatch({
      type: 'UPDATE_LOCATION',
      location: props.location
    });
  }, [props.location.pathname]);
  return /*#__PURE__*/React__default.createElement(TransitionContext.Provider, {
    value: [state, dispatch]
  }, props.children);
};

TransitionProvider.propTypes = {
  location: propTypes.object,
  mode: propTypes.oneOf(['successive', 'immediate']),
  children: propTypes.node,
  enter: propTypes.object,
  usual: propTypes.object,
  leave: propTypes.object,
  style: propTypes.object
};
TransitionProvider.defaultProps = {
  mode: 'successive',
  location: {},
  children: null,
  enter: {
    opacity: 0,
    config: 'stiff'
  },
  usual: {
    opacity: 1,
    config: 'stiff'
  },
  leave: {
    opacity: 0,
    config: 'stiff'
  },
  style: null
};
var useTransitionStore = function useTransitionStore() {
  return React.useContext(TransitionContext);
};

var TransitionLink = function TransitionLink(_ref) {
  var to = _ref.to,
      enter = _ref.enter,
      usual = _ref.usual,
      leave = _ref.leave,
      y = _ref.y,
      mode = _ref.mode,
      className = _ref.className,
      style = _ref.style,
      children = _ref.children;

  var _useTransitionStore = useTransitionStore(),
      _useTransitionStore2 = _slicedToArray(_useTransitionStore, 2),
      dispatch = _useTransitionStore2[1];

  function onClick(event) {
    event.preventDefault();
    var scrollY = typeof y === 'function' ? y() : y;
    dispatch({
      type: 'NAVIGATE',
      to: to,
      enter: enter,
      usual: usual,
      leave: leave,
      y: scrollY,
      mode: mode
    });
  }

  return /*#__PURE__*/React__default.createElement("a", {
    href: to,
    onClick: onClick,
    className: className,
    style: style
  }, children);
};

TransitionLink.propTypes = {
  to: propTypes.string.isRequired,
  enter: propTypes.object,
  usual: propTypes.object,
  leave: propTypes.object,
  y: propTypes.oneOfType([propTypes.number, propTypes.func]),
  mode: propTypes.string,
  className: propTypes.string,
  style: propTypes.object,
  children: propTypes.node
};
TransitionLink.defaultProps = {
  enter: null,
  usual: null,
  leave: null,
  y: undefined,
  mode: '',
  className: '',
  style: {},
  children: null
};

var TransitionView = function TransitionView(_ref) {
  var view = _ref.view,
      mode = _ref.mode,
      action = _ref.action,
      enter = _ref.enter,
      leave = _ref.leave,
      usual = _ref.usual,
      y = _ref.y,
      isKeep = _ref.isKeep,
      skipAnimations = _ref.skipAnimations,
      skipEnterAnimation = _ref.skipEnterAnimation,
      skipLeaveAnimation = _ref.skipLeaveAnimation;

  var _useTransitionStore = useTransitionStore(),
      _useTransitionStore2 = _slicedToArray(_useTransitionStore, 2),
      hasEntered = _useTransitionStore2[0].hasEntered,
      dispatch = _useTransitionStore2[1];

  var _useState = React.useState(function () {
    if (mode === 'immediate') {
      return {
        position: 'fixed',
        transform: "translate3d(0,-".concat(y, "px,0)")
      };
    }

    if (isKeep) {
      return {
        opacity: 0
      };
    }

    return {};
  }),
      _useState2 = _slicedToArray(_useState, 2),
      styles = _useState2[0],
      setStyles = _useState2[1];

  var _useSpring = reactSpring.useSpring(function () {
    return skipEnterAnimation ? usual // because start-callback would be called if spread-operator (spring-bug?)
    : {
      opacity: enter.opacity,
      transform: enter.transform
    };
  }),
      _useSpring2 = _slicedToArray(_useSpring, 2),
      props = _useSpring2[0],
      set = _useSpring2[1];

  React.useEffect(function () {
    switch (action) {
      case 'enter':
        set(_objectSpread2(_objectSpread2({}, usual), {}, {
          config: enter.config,
          onStart: function onStart(props) {
            if (mode === 'successive' || isKeep) {
              window.scrollTo(0, y);
            }

            if (typeof enter.onStart === 'function') enter.onStart(props);
          },
          onFrame: function onFrame(props) {
            if (typeof enter.onFrame === 'function') enter.onFrame(props);
          },
          onRest: function onRest(props) {
            if (isKeep) {
              dispatch({
                type: 'REMOVE_KEEP'
              });
              setStyles({
                opacity: 1
              });
            }

            dispatch({
              type: 'HAS_ENTERED'
            });
          }
        }));
        break;

      case 'leave':
        if (skipLeaveAnimation) {
          dispatch({
            type: 'REMOVE_VIEW',
            locationKey: view.props.location.key
          });

          if (mode === 'successive') {
            window.scrollTo(0, 0);
            dispatch({
              type: 'ADD_VIEW_FROM_QUEUE'
            });
          }

          return;
        }

        set(_objectSpread2(_objectSpread2({}, leave), {}, {
          config: leave.config,
          onStart: function onStart(props) {
            if (typeof leave.onStart === 'function') leave.onStart(props);
          },
          onFrame: function onFrame(props) {
            if (typeof leave.onFrame === 'function') leave.onFrame(props);
          },
          onRest: function onRest(props) {
            dispatch({
              type: 'REMOVE_VIEW',
              locationKey: view.props.location.key
            });

            if (mode === 'successive') {
              window.scrollTo(0, 0);
              dispatch({
                type: 'ADD_VIEW_FROM_QUEUE'
              });
            }

            if (typeof leave.onRest === 'function') leave.onRest(props);
          }
        }));
        break;
    }
  }, [action]);
  React.useEffect(function () {
    if (!hasEntered) return;

    if (mode === 'immediate') {
      setStyles({
        position: 'relative',
        transform: 'translate3d(0, 0px, 0)',
        willChange: ''
      });
    }

    if (typeof enter.onRest === 'function') enter.onRest(props);
  }, [hasEntered]);
  React.useEffect(function () {
    if (styles.position === 'relative') {
      window.scrollTo(0, y);
    }
  }, [styles.position]);
  return /*#__PURE__*/React__default.createElement("div", {
    className: "view-container",
    style: _objectSpread2({
      width: '100%',
      willChange: mode === 'immediate' && 'transform',
      top: 0
    }, styles)
  }, /*#__PURE__*/React__default.createElement(reactSpring.animated.div, {
    style: {
      width: '100%',
      willChange: "opacity".concat(enter.transform !== 'none' || usual.transform !== 'none' ? ', transform' : ''),
      opacity: props.opacity,
      transform: props.transform
    },
    className: "view"
  }, view));
};

var TransitionKeep = function TransitionKeep(_ref) {
  var view = _ref.view;
  return /*#__PURE__*/React__default.createElement("div", {
    className: "view-container",
    style: {
      width: '100%',
      gridArea: 'View',
      top: 0,
      position: 'fixed',
      transform: "translate3d(0,-".concat(view.y, "px,0)"),
      zIndex: -1
    }
  }, /*#__PURE__*/React__default.createElement("div", {
    className: "view view--keep"
  }, view));
};

function getY$1(_ref) {
  var view = _ref.view,
      keep = _ref.keep,
      currentLocation = _ref.currentLocation;
  var isKeep = keep && keep.props.location.pathname === view.props.location.pathname;
  if (isKeep) return keep.y;

  if (currentLocation && currentLocation.y) {
    return currentLocation.y;
  }

  return 0;
}

var TransitionViews = function TransitionViews(_ref2) {
  var children = _ref2.children,
      style = _ref2.style;

  var _useTransitionStore = useTransitionStore(),
      _useTransitionStore2 = _slicedToArray(_useTransitionStore, 2),
      _useTransitionStore2$ = _useTransitionStore2[0],
      enter = _useTransitionStore2$.enter,
      usual = _useTransitionStore2$.usual,
      leave = _useTransitionStore2$.leave,
      to = _useTransitionStore2$.to,
      currentLocation = _useTransitionStore2$.currentLocation,
      views = _useTransitionStore2$.views,
      keep = _useTransitionStore2$.keep,
      mode = _useTransitionStore2$.mode,
      dispatch = _useTransitionStore2[1];

  React.useEffect(function () {
    if (to) gatsby.navigate(to);
  }, [to]);
  React.useEffect(function () {
    if (!currentLocation.key) return;
    var currentMode = currentLocation.mode || mode;

    if (currentMode === 'successive') {
      if (views.filter(function (view) {
        return view;
      }).length) {
        dispatch({
          type: 'ADD_QUEUE',
          view: children
        });
      } else {
        dispatch({
          type: 'ADD_VIEW_DIRECTLY',
          view: children
        });
      }
    }

    if (currentMode === 'immediate') {
      dispatch({
        type: 'ADD_VIEW_DIRECTLY',
        view: children
      });
    }
  }, [currentLocation.key]);

  if (typeof window === 'undefined') {
    return /*#__PURE__*/React__default.createElement("div", {
      className: "views",
      style: style
    }, children);
  }

  return /*#__PURE__*/React__default.createElement("div", {
    className: "views",
    style: style
  }, views.map(function (view, index) {
    if (!view) return null;
    var isKeep = keep && keep.props.location.pathname === view.props.location.pathname;
    return /*#__PURE__*/React__default.createElement(TransitionView, {
      key: view.props.location.key,
      view: view,
      leave: currentLocation.leave || leave,
      usual: view.props.location.pathname === currentLocation.pathname && currentLocation.usual || usual,
      enter: view.props.location.pathname === currentLocation.pathname && currentLocation.enter || enter,
      mode: currentLocation.mode || mode,
      isKeep: isKeep,
      skipAnimations: currentLocation.skipAnimations,
      skipEnterAnimation: isKeep,
      skipLeaveAnimation: isKeep,
      y: getY$1({
        keep: keep,
        view: view,
        currentLocation: currentLocation
      }),
      action: !index ? 'enter' : 'leave'
    });
  }), keep && /*#__PURE__*/React__default.createElement(TransitionKeep, {
    key: keep.props.location.key,
    view: keep
  }));
};

exports.TransitionLink = TransitionLink;
exports.TransitionProvider = TransitionProvider;
exports.TransitionViews = TransitionViews;
exports.useTransitionStore = useTransitionStore;
//# sourceMappingURL=index.js.map