@guardian/threads/dist/sandbox.f69400ca.js

// modules are defined as an array
// [ module function, map of requires ]
//
// map of requires is short require name -> numeric require
//
// anything defined in a previous bundle is accessed via the
// orig method which is the require for previous bundles
parcelRequire = (function (modules, cache, entry, globalName) {
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        }

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        // many times as there are bundles until the module is found or
        // we exhaust the require chain.
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          return previousRequire(name, true);
        }

        // Try the node require function if it exists.
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          return nodeRequire(name);
        }

        var err = new Error('Cannot find module \'' + name + '\'');
        err.code = 'MODULE_NOT_FOUND';
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      }

      localRequire.resolve = resolve;
      localRequire.cache = {};

      var module = cache[name] = new newRequire.Module(name);

      modules[name][0].call(module.exports, localRequire, module, module.exports, this);
    }

    return cache[name].exports;

    function localRequire(x){
      return newRequire(localRequire.resolve(x));
    }

    function resolve(x){
      return modules[name][1][x] || x;
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  }

  function Module(moduleName) {
    this.id = moduleName;
    this.bundle = newRequire;
    this.exports = {};
  }

  newRequire.isParcelRequire = true;
  newRequire.Module = Module;
  newRequire.modules = modules;
  newRequire.cache = cache;
  newRequire.parent = previousRequire;
  newRequire.register = function (id, exports) {
    modules[id] = [function (require, module) {
      module.exports = exports;
    }, {}];
  };

  var error;
  for (var i = 0; i < entry.length; i++) {
    try {
      newRequire(entry[i]);
    } catch (e) {
      // Save first error but execute all entries
      if (!error) {
        error = e;
      }
    }
  }

  if (entry.length) {
    // Expose entry point to Node, AMD or browser globals
    // Based on https://github.com/ForbesLindesay/umd/blob/master/template.js
    var mainExports = newRequire(entry[entry.length - 1]);

    // CommonJS
    if (typeof exports === "object" && typeof module !== "undefined") {
      module.exports = mainExports;

    // RequireJS
    } else if (typeof define === "function" && define.amd) {
     define(function () {
       return mainExports;
     });

    // <script>
    } else if (globalName) {
      this[globalName] = mainExports;
    }
  }

  // Override the current require with this new one
  parcelRequire = newRequire;

  if (error) {
    // throw error from earlier, _after updating parcelRequire_
    throw error;
  }

  return newRequire;
})({"../node_modules/tslib/tslib.es6.js":[function(require,module,exports) {
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.__extends = __extends;
exports.__rest = __rest;
exports.__decorate = __decorate;
exports.__param = __param;
exports.__metadata = __metadata;
exports.__awaiter = __awaiter;
exports.__generator = __generator;
exports.__exportStar = __exportStar;
exports.__values = __values;
exports.__read = __read;
exports.__spread = __spread;
exports.__spreadArrays = __spreadArrays;
exports.__await = __await;
exports.__asyncGenerator = __asyncGenerator;
exports.__asyncDelegator = __asyncDelegator;
exports.__asyncValues = __asyncValues;
exports.__makeTemplateObject = __makeTemplateObject;
exports.__importStar = __importStar;
exports.__importDefault = __importDefault;
exports.__assign = void 0;

/*! *****************************************************************************
Copyright (c) Microsoft Corporation. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at http://www.apache.org/licenses/LICENSE-2.0

THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
MERCHANTABLITY OR NON-INFRINGEMENT.

See the Apache Version 2.0 License for specific language governing permissions
and limitations under the License.
***************************************************************************** */

/* global Reflect, Promise */
var extendStatics = function (d, b) {
  extendStatics = Object.setPrototypeOf || {
    __proto__: []
  } instanceof Array && function (d, b) {
    d.__proto__ = b;
  } || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
  };

  return extendStatics(d, b);
};

function __extends(d, b) {
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  function __() {
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  }

  d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}

var __assign = function () {
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    for (var s, i = 1, n = arguments.length; i < n; i++) {
      s = arguments[i];

      for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
    }

    return t;
  };

  return __assign.apply(this, arguments);
};

exports.__assign = __assign;

function __rest(s, e) {
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}

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}

function __metadata(metadataKey, metadataValue) {
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}

function __awaiter(thisArg, _arguments, P, generator) {
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function __exportStar(m, exports) {
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function __values(o) {
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  return {
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}

function __read(o, n) {
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  return ar;
}

function __spread() {
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function __spreadArrays() {
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;

function __await(v) {
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}

function __asyncGenerator(thisArg, _arguments, generator) {
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      i,
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    } : f;
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}

function __asyncValues(o) {
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      resolve({
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        done: d
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    }, reject);
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}

function __makeTemplateObject(cooked, raw) {
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      value: raw
    });
  } else {
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  }

  return cooked;
}

;

function __importStar(mod) {
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  var result = {};
  if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
  result.default = mod;
  return result;
}

function __importDefault(mod) {
  return mod && mod.__esModule ? mod : {
    default: mod
  };
}
},{}],"../node_modules/object-assign/index.js":[function(require,module,exports) {
/*
object-assign
(c) Sindre Sorhus
@license MIT
*/
'use strict';
/* 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;
  }
}

module.exports = 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;
};
},{}],"../node_modules/prop-types/lib/ReactPropTypesSecret.js":[function(require,module,exports) {
/**
 * 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.
 */

'use strict';

var ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';

module.exports = ReactPropTypesSecret;

},{}],"../node_modules/prop-types/checkPropTypes.js":[function(require,module,exports) {
/**
 * 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.
 */
'use strict';

var printWarning = function () {};

if ("development" !== 'production') {
  var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');

  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 ("development" !== '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);
        } 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 ("development" !== 'production') {
    loggedTypeFailures = {};
  }
};

module.exports = checkPropTypes;
},{"./lib/ReactPropTypesSecret":"../node_modules/prop-types/lib/ReactPropTypesSecret.js"}],"../node_modules/react/cjs/react.development.js":[function(require,module,exports) {
/** @license React v16.11.0
 * react.development.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.
 */
'use strict';

if ("development" !== "production") {
  (function () {
    'use strict';

    var _assign = require('object-assign');

    var checkPropTypes = require('prop-types/checkPropTypes'); // TODO: this is special because it gets imported during build.


    var ReactVersion = '16.11.0'; // 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_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_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;
    var MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
    var FAUX_ITERATOR_SYMBOL = '@@iterator';

    function getIteratorFn(maybeIterable) {
      if (maybeIterable === null || typeof maybeIterable !== 'object') {
        return null;
      }

      var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];

      if (typeof maybeIterator === 'function') {
        return maybeIterator;
      }

      return null;
    } // Do not require this module directly! Use normal `invariant` calls with
    // template literal strings. The messages will be replaced with error codes
    // during build.

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

    /**
     * Forked from fbjs/warning:
     * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
     *
     * Only change is we use console.warn instead of console.error,
     * and do nothing when 'console' is not supported.
     * This really simplifies the code.
     * ---
     * Similar to invariant but only logs a warning if the condition is not met.
     * This can be used to log issues in development environments in critical
     * paths. Removing the logging code for production environments will keep the
     * same logic and follow the same code paths.
     */


    var lowPriorityWarningWithoutStack = function () {};

    {
      var printWarning = function (format) {
        for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
          args[_key - 1] = arguments[_key];
        }

        var argIndex = 0;
        var message = 'Warning: ' + format.replace(/%s/g, function () {
          return args[argIndex++];
        });

        if (typeof console !== 'undefined') {
          console.warn(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) {}
      };

      lowPriorityWarningWithoutStack = function (condition, format) {
        if (format === undefined) {
          throw new Error('`lowPriorityWarningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
        }

        if (!condition) {
          for (var _len2 = arguments.length, args = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
            args[_key2 - 2] = arguments[_key2];
          }

          printWarning.apply(void 0, [format].concat(args));
        }
      };
    }
    var lowPriorityWarningWithoutStack$1 = lowPriorityWarningWithoutStack;
    /**
     * Similar to invariant but only logs a warning if the condition is not met.
     * This can be used to log issues in development environments in critical
     * paths. Removing the logging code for production environments will keep the
     * same logic and follow the same code paths.
     */

    var warningWithoutStack = function () {};

    {
      warningWithoutStack = function (condition, format) {
        for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
          args[_key - 2] = arguments[_key];
        }

        if (format === undefined) {
          throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
        }

        if (args.length > 8) {
          // Check before the condition to catch violations early.
          throw new Error('warningWithoutStack() currently supports at most 8 arguments.');
        }

        if (condition) {
          return;
        }

        if (typeof console !== 'undefined') {
          var argsWithFormat = args.map(function (item) {
            return '' + item;
          });
          argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it
          // breaks IE9: https://github.com/facebook/react/issues/13610

          Function.prototype.apply.call(console.error, console, argsWithFormat);
        }

        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.
          var argIndex = 0;
          var message = 'Warning: ' + format.replace(/%s/g, function () {
            return args[argIndex++];
          });
          throw new Error(message);
        } catch (x) {}
      };
    }
    var warningWithoutStack$1 = warningWithoutStack;
    var didWarnStateUpdateForUnmountedComponent = {};

    function warnNoop(publicInstance, callerName) {
      {
        var _constructor = publicInstance.constructor;
        var componentName = _constructor && (_constructor.displayName || _constructor.name) || 'ReactClass';
        var warningKey = componentName + "." + callerName;

        if (didWarnStateUpdateForUnmountedComponent[warningKey]) {
          return;
        }

        warningWithoutStack$1(false, "Can't call %s on a component that is not yet mounted. " + 'This is a no-op, but it might indicate a bug in your application. ' + 'Instead, assign to `this.state` directly or define a `state = {};` ' + 'class property with the desired state in the %s component.', callerName, componentName);
        didWarnStateUpdateForUnmountedComponent[warningKey] = true;
      }
    }
    /**
     * This is the abstract API for an update queue.
     */


    var ReactNoopUpdateQueue = {
      /**
       * Checks whether or not this composite component is mounted.
       * @param {ReactClass} publicInstance The instance we want to test.
       * @return {boolean} True if mounted, false otherwise.
       * @protected
       * @final
       */
      isMounted: function (publicInstance) {
        return false;
      },

      /**
       * Forces an update. This should only be invoked when it is known with
       * certainty that we are **not** in a DOM transaction.
       *
       * You may want to call this when you know that some deeper aspect of the
       * component's state has changed but `setState` was not called.
       *
       * This will not invoke `shouldComponentUpdate`, but it will invoke
       * `componentWillUpdate` and `componentDidUpdate`.
       *
       * @param {ReactClass} publicInstance The instance that should rerender.
       * @param {?function} callback Called after component is updated.
       * @param {?string} callerName name of the calling function in the public API.
       * @internal
       */
      enqueueForceUpdate: function (publicInstance, callback, callerName) {
        warnNoop(publicInstance, 'forceUpdate');
      },

      /**
       * Replaces all of the state. Always use this or `setState` to mutate state.
       * You should treat `this.state` as immutable.
       *
       * There is no guarantee that `this.state` will be immediately updated, so
       * accessing `this.state` after calling this method may return the old value.
       *
       * @param {ReactClass} publicInstance The instance that should rerender.
       * @param {object} completeState Next state.
       * @param {?function} callback Called after component is updated.
       * @param {?string} callerName name of the calling function in the public API.
       * @internal
       */
      enqueueReplaceState: function (publicInstance, completeState, callback, callerName) {
        warnNoop(publicInstance, 'replaceState');
      },

      /**
       * Sets a subset of the state. This only exists because _pendingState is
       * internal. This provides a merging strategy that is not available to deep
       * properties which is confusing. TODO: Expose pendingState or don't use it
       * during the merge.
       *
       * @param {ReactClass} publicInstance The instance that should rerender.
       * @param {object} partialState Next partial state to be merged with state.
       * @param {?function} callback Called after component is updated.
       * @param {?string} Name of the calling function in the public API.
       * @internal
       */
      enqueueSetState: function (publicInstance, partialState, callback, callerName) {
        warnNoop(publicInstance, 'setState');
      }
    };
    var emptyObject = {};
    {
      Object.freeze(emptyObject);
    }
    /**
     * Base class helpers for the updating state of a component.
     */

    function Component(props, context, updater) {
      this.props = props;
      this.context = context; // If a component has string refs, we will assign a different object later.

      this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the
      // renderer.

      this.updater = updater || ReactNoopUpdateQueue;
    }

    Component.prototype.isReactComponent = {};
    /**
     * Sets a subset of the state. Always use this to mutate
     * state. You should treat `this.state` as immutable.
     *
     * There is no guarantee that `this.state` will be immediately updated, so
     * accessing `this.state` after calling this method may return the old value.
     *
     * There is no guarantee that calls to `setState` will run synchronously,
     * as they may eventually be batched together.  You can provide an optional
     * callback that will be executed when the call to setState is actually
     * completed.
     *
     * When a function is provided to setState, it will be called at some point in
     * the future (not synchronously). It will be called with the up to date
     * component arguments (state, props, context). These values can be different
     * from this.* because your function may be called after receiveProps but before
     * shouldComponentUpdate, and this new state, props, and context will not yet be
     * assigned to this.
     *
     * @param {object|function} partialState Next partial state or function to
     *        produce next partial state to be merged with current state.
     * @param {?function} callback Called after state is updated.
     * @final
     * @protected
     */

    Component.prototype.setState = function (partialState, callback) {
      if (!(typeof partialState === 'object' || typeof partialState === 'function' || partialState == null)) {
        {
          throw Error("setState(...): takes an object of state variables to update or a function which returns an object of state variables.");
        }
      }

      this.updater.enqueueSetState(this, partialState, callback, 'setState');
    };
    /**
     * Forces an update. This should only be invoked when it is known with
     * certainty that we are **not** in a DOM transaction.
     *
     * You may want to call this when you know that some deeper aspect of the
     * component's state has changed but `setState` was not called.
     *
     * This will not invoke `shouldComponentUpdate`, but it will invoke
     * `componentWillUpdate` and `componentDidUpdate`.
     *
     * @param {?function} callback Called after update is complete.
     * @final
     * @protected
     */


    Component.prototype.forceUpdate = function (callback) {
      this.updater.enqueueForceUpdate(this, callback, 'forceUpdate');
    };
    /**
     * Deprecated APIs. These APIs used to exist on classic React classes but since
     * we would like to deprecate them, we're not going to move them over to this
     * modern base class. Instead, we define a getter that warns if it's accessed.
     */


    {
      var deprecatedAPIs = {
        isMounted: ['isMounted', 'Instead, make sure to clean up subscriptions and pending requests in ' + 'componentWillUnmount to prevent memory leaks.'],
        replaceState: ['replaceState', 'Refactor your code to use setState instead (see ' + 'https://github.com/facebook/react/issues/3236).']
      };

      var defineDeprecationWarning = function (methodName, info) {
        Object.defineProperty(Component.prototype, methodName, {
          get: function () {
            lowPriorityWarningWithoutStack$1(false, '%s(...) is deprecated in plain JavaScript React classes. %s', info[0], info[1]);
            return undefined;
          }
        });
      };

      for (var fnName in deprecatedAPIs) {
        if (deprecatedAPIs.hasOwnProperty(fnName)) {
          defineDeprecationWarning(fnName, deprecatedAPIs[fnName]);
        }
      }
    }

    function ComponentDummy() {}

    ComponentDummy.prototype = Component.prototype;
    /**
     * Convenience component with default shallow equality check for sCU.
     */

    function PureComponent(props, context, updater) {
      this.props = props;
      this.context = context; // If a component has string refs, we will assign a different object later.

      this.refs = emptyObject;
      this.updater = updater || ReactNoopUpdateQueue;
    }

    var pureComponentPrototype = PureComponent.prototype = new ComponentDummy();
    pureComponentPrototype.constructor = PureComponent; // Avoid an extra prototype jump for these methods.

    _assign(pureComponentPrototype, Component.prototype);

    pureComponentPrototype.isPureReactComponent = true; // an immutable object with a single mutable value

    function createRef() {
      var refObject = {
        current: null
      };
      {
        Object.seal(refObject);
      }
      return refObject;
    }
    /**
     * Keeps track of the current dispatcher.
     */


    var ReactCurrentDispatcher = {
      /**
       * @internal
       * @type {ReactComponent}
       */
      current: null
    };
    /**
     * Keeps track of the current batch's configuration such as how long an update
     * should suspend for if it needs to.
     */

    var ReactCurrentBatchConfig = {
      suspense: null
    };
    /**
     * Keeps track of the current owner.
     *
     * The current owner is the component who should own any components that are
     * currently being constructed.
     */

    var ReactCurrentOwner = {
      /**
       * @internal
       * @type {ReactComponent}
       */
      current: null
    };
    var BEFORE_SLASH_RE = /^(.*)[\\\/]/;

    var describeComponentFrame = function (name, source, ownerName) {
      var sourceInfo = '';

      if (source) {
        var path = source.fileName;
        var fileName = path.replace(BEFORE_SLASH_RE, '');
        {
          // In DEV, include code for a common special case:
          // prefer "folder/index.js" instead of just "index.js".
          if (/^index\./.test(fileName)) {
            var match = path.match(BEFORE_SLASH_RE);

            if (match) {
              var pathBeforeSlash = match[1];

              if (pathBeforeSlash) {
                var folderName = pathBeforeSlash.replace(BEFORE_SLASH_RE, '');
                fileName = folderName + '/' + fileName;
              }
            }
          }
        }
        sourceInfo = ' (at ' + fileName + ':' + source.lineNumber + ')';
      } else if (ownerName) {
        sourceInfo = ' (created by ' + ownerName + ')';
      }

      return '\n    in ' + (name || 'Unknown') + sourceInfo;
    };

    var Resolved = 1;

    function refineResolvedLazyComponent(lazyComponent) {
      return lazyComponent._status === Resolved ? lazyComponent._result : null;
    }

    function getWrappedName(outerType, innerType, wrapperName) {
      var functionName = innerType.displayName || innerType.name || '';
      return outerType.displayName || (functionName !== '' ? wrapperName + "(" + functionName + ")" : wrapperName);
    }

    function getComponentName(type) {
      if (type == null) {
        // Host root, text node or just invalid type.
        return null;
      }

      {
        if (typeof type.tag === 'number') {
          warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');
        }
      }

      if (typeof type === 'function') {
        return type.displayName || type.name || null;
      }

      if (typeof type === 'string') {
        return type;
      }

      switch (type) {
        case REACT_FRAGMENT_TYPE:
          return 'Fragment';

        case REACT_PORTAL_TYPE:
          return 'Portal';

        case REACT_PROFILER_TYPE:
          return "Profiler";

        case REACT_STRICT_MODE_TYPE:
          return 'StrictMode';

        case REACT_SUSPENSE_TYPE:
          return 'Suspense';

        case REACT_SUSPENSE_LIST_TYPE:
          return 'SuspenseList';
      }

      if (typeof type === 'object') {
        switch (type.$$typeof) {
          case REACT_CONTEXT_TYPE:
            return 'Context.Consumer';

          case REACT_PROVIDER_TYPE:
            return 'Context.Provider';

          case REACT_FORWARD_REF_TYPE:
            return getWrappedName(type, type.render, 'ForwardRef');

          case REACT_MEMO_TYPE:
            return getComponentName(type.type);

          case REACT_LAZY_TYPE:
            {
              var thenable = type;
              var resolvedThenable = refineResolvedLazyComponent(thenable);

              if (resolvedThenable) {
                return getComponentName(resolvedThenable);
              }

              break;
            }
        }
      }

      return null;
    }

    var ReactDebugCurrentFrame = {};
    var currentlyValidatingElement = null;

    function setCurrentlyValidatingElement(element) {
      {
        currentlyValidatingElement = element;
      }
    }

    {
      // Stack implementation injected by the current renderer.
      ReactDebugCurrentFrame.getCurrentStack = null;

      ReactDebugCurrentFrame.getStackAddendum = function () {
        var stack = ''; // Add an extra top frame while an element is being validated

        if (currentlyValidatingElement) {
          var name = getComponentName(currentlyValidatingElement.type);
          var owner = currentlyValidatingElement._owner;
          stack += describeComponentFrame(name, currentlyValidatingElement._source, owner && getComponentName(owner.type));
        } // Delegate to the injected renderer-specific implementation


        var impl = ReactDebugCurrentFrame.getCurrentStack;

        if (impl) {
          stack += impl() || '';
        }

        return stack;
      };
    }
    /**
     * Used by act() to track whether you're inside an act() scope.
     */

    var IsSomeRendererActing = {
      current: false
    };
    var ReactSharedInternals = {
      ReactCurrentDispatcher: ReactCurrentDispatcher,
      ReactCurrentBatchConfig: ReactCurrentBatchConfig,
      ReactCurrentOwner: ReactCurrentOwner,
      IsSomeRendererActing: IsSomeRendererActing,
      // Used by renderers to avoid bundling object-assign twice in UMD bundles:
      assign: _assign
    };
    {
      _assign(ReactSharedInternals, {
        // These should not be included in production.
        ReactDebugCurrentFrame: ReactDebugCurrentFrame,
        // Shim for React DOM 16.0.0 which still destructured (but not used) this.
        // TODO: remove in React 17.0.
        ReactComponentTreeHook: {}
      });
    }
    /**
     * Similar to invariant but only logs a warning if the condition is not met.
     * This can be used to log issues in development environments in critical
     * paths. Removing the logging code for production environments will keep the
     * same logic and follow the same code paths.
     */

    var warning = warningWithoutStack$1;
    {
      warning = function (condition, format) {
        if (condition) {
          return;
        }

        var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
        var stack = ReactDebugCurrentFrame.getStackAddendum(); // eslint-disable-next-line react-internal/warning-and-invariant-args

        for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
          args[_key - 2] = arguments[_key];
        }

        warningWithoutStack$1.apply(void 0, [false, format + '%s'].concat(args, [stack]));
      };
    }
    var warning$1 = warning;
    var hasOwnProperty = Object.prototype.hasOwnProperty;
    var RESERVED_PROPS = {
      key: true,
      ref: true,
      __self: true,
      __source: true
    };
    var specialPropKeyWarningShown;
    var specialPropRefWarningShown;

    function hasValidRef(config) {
      {
        if (hasOwnProperty.call(config, 'ref')) {
          var getter = Object.getOwnPropertyDescriptor(config, 'ref').get;

          if (getter && getter.isReactWarning) {
            return false;
          }
        }
      }
      return config.ref !== undefined;
    }

    function hasValidKey(config) {
      {
        if (hasOwnProperty.call(config, 'key')) {
          var getter = Object.getOwnPropertyDescriptor(config, 'key').get;

          if (getter && getter.isReactWarning) {
            return false;
          }
        }
      }
      return config.key !== undefined;
    }

    function defineKeyPropWarningGetter(props, displayName) {
      var warnAboutAccessingKey = function () {
        if (!specialPropKeyWarningShown) {
          specialPropKeyWarningShown = true;
          warningWithoutStack$1(false, '%s: `key` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
        }
      };

      warnAboutAccessingKey.isReactWarning = true;
      Object.defineProperty(props, 'key', {
        get: warnAboutAccessingKey,
        configurable: true
      });
    }

    function defineRefPropWarningGetter(props, displayName) {
      var warnAboutAccessingRef = function () {
        if (!specialPropRefWarningShown) {
          specialPropRefWarningShown = true;
          warningWithoutStack$1(false, '%s: `ref` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
        }
      };

      warnAboutAccessingRef.isReactWarning = true;
      Object.defineProperty(props, 'ref', {
        get: warnAboutAccessingRef,
        configurable: true
      });
    }
    /**
     * Factory method to create a new React element. This no longer adheres to
     * the class pattern, so do not use new to call it. Also, instanceof check
     * will not work. Instead test $$typeof field against Symbol.for('react.element') to check
     * if something is a React Element.
     *
     * @param {*} type
     * @param {*} props
     * @param {*} key
     * @param {string|object} ref
     * @param {*} owner
     * @param {*} self A *temporary* helper to detect places where `this` is
     * different from the `owner` when React.createElement is called, so that we
     * can warn. We want to get rid of owner and replace string `ref`s with arrow
     * functions, and as long as `this` and owner are the same, there will be no
     * change in behavior.
     * @param {*} source An annotation object (added by a transpiler or otherwise)
     * indicating filename, line number, and/or other information.
     * @internal
     */


    var ReactElement = function (type, key, ref, self, source, owner, props) {
      var element = {
        // This tag allows us to uniquely identify this as a React Element
        $$typeof: REACT_ELEMENT_TYPE,
        // Built-in properties that belong on the element
        type: type,
        key: key,
        ref: ref,
        props: props,
        // Record the component responsible for creating this element.
        _owner: owner
      };
      {
        // The validation flag is currently mutative. We put it on
        // an external backing store so that we can freeze the whole object.
        // This can be replaced with a WeakMap once they are implemented in
        // commonly used development environments.
        element._store = {}; // To make comparing ReactElements easier for testing purposes, we make
        // the validation flag non-enumerable (where possible, which should
        // include every environment we run tests in), so the test framework
        // ignores it.

        Object.defineProperty(element._store, 'validated', {
          configurable: false,
          enumerable: false,
          writable: true,
          value: false
        }); // self and source are DEV only properties.

        Object.defineProperty(element, '_self', {
          configurable: false,
          enumerable: false,
          writable: false,
          value: self
        }); // Two elements created in two different places should be considered
        // equal for testing purposes and therefore we hide it from enumeration.

        Object.defineProperty(element, '_source', {
          configurable: false,
          enumerable: false,
          writable: false,
          value: source
        });

        if (Object.freeze) {
          Object.freeze(element.props);
          Object.freeze(element);
        }
      }
      return element;
    };
    /**
     * https://github.com/reactjs/rfcs/pull/107
     * @param {*} type
     * @param {object} props
     * @param {string} key
     */

    /**
     * https://github.com/reactjs/rfcs/pull/107
     * @param {*} type
     * @param {object} props
     * @param {string} key
     */


    function jsxDEV(type, config, maybeKey, source, self) {
      var propName; // Reserved names are extracted

      var props = {};
      var key = null;
      var ref = null; // Currently, key can be spread in as a prop. This causes a potential
      // issue if key is also explicitly declared (ie. <div {...props} key="Hi" />
      // or <div key="Hi" {...props} /> ). We want to deprecate key spread,
      // but as an intermediary step, we will use jsxDEV for everything except
      // <div {...props} key="Hi" />, because we aren't currently able to tell if
      // key is explicitly declared to be undefined or not.

      if (maybeKey !== undefined) {
        key = '' + maybeKey;
      }

      if (hasValidKey(config)) {
        key = '' + config.key;
      }

      if (hasValidRef(config)) {
        ref = config.ref;
      } // Remaining properties are added to a new props object


      for (propName in config) {
        if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
          props[propName] = config[propName];
        }
      } // Resolve default props


      if (type && type.defaultProps) {