/** @license React v16.13.1

  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('react')) :

  typeof define === 'function' && define.amd ? define(['exports', 'react'], factory) :

  (global = global || self, factory(global.ReactDOM = {}, global.React));

}(this, (function (exports, React) { 'use strict';

  var ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED; // Prevent newer renderers from RTE when used with older react package versions.

  // Current owner and dispatcher used to share the same ref,

  // but PR #14548 split them out to better support the react-debug-tools package.

  if (!ReactSharedInternals.hasOwnProperty('ReactCurrentDispatcher')) {

    ReactSharedInternals.ReactCurrentDispatcher = {

      current: null

    };

  }

  if (!ReactSharedInternals.hasOwnProperty('ReactCurrentBatchConfig')) {

    ReactSharedInternals.ReactCurrentBatchConfig = {

      suspense: null

    };

  }

  // by calls to these methods by a Babel plugin.

  //

  // In PROD (or in packages without access to React internals),

  // they are left as they are instead.

  function warn(format) {

    {

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

        args[_key - 1] = arguments[_key];

      }

      printWarning('warn', format, args);

    }

  }

  function error(format) {

    {

      for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {

        args[_key2 - 1] = arguments[_key2];

      }

      printWarning('error', format, args);

    }

  }

  function printWarning(level, format, args) {

    // When changing this logic, you might want to also

    // update consoleWithStackDev.www.js as well.

    {

      var hasExistingStack = args.length > 0 && typeof args[args.length - 1] === 'string' && args[args.length - 1].indexOf('\n    in') === 0;

      if (!hasExistingStack) {

        var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;

        var stack = ReactDebugCurrentFrame.getStackAddendum();

        if (stack !== '') {

          format += '%s';

          args = args.concat([stack]);

        }

      }

      var argsWithFormat = args.map(function (item) {

        return '' + item;

      }); // Careful: RN currently depends on this prefix

      argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it

      // breaks IE9: https://github.com/facebook/react/issues/13610

      // eslint-disable-next-line react-internal/no-production-logging

      Function.prototype.apply.call(console[level], 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) {}

    }

  }

      throw Error( "ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM." );

    }

  }

  var invokeGuardedCallbackImpl = function (name, func, context, a, b, c, d, e, f) {

    var funcArgs = Array.prototype.slice.call(arguments, 3);

    try {

      func.apply(context, funcArgs);

    } catch (error) {

      this.onError(error);

    }

  };

    // In DEV mode, we swap out invokeGuardedCallback for a special version

    // that plays more nicely with the browser's DevTools. The idea is to preserve

    // "Pause on exceptions" behavior. Because React wraps all user-provided

    // functions in invokeGuardedCallback, and the production version of

    // invokeGuardedCallback uses a try-catch, all user exceptions are treated

    // like caught exceptions, and the DevTools won't pause unless the developer

    // takes the extra step of enabling pause on caught exceptions. This is

    // unintuitive, though, because even though React has caught the error, from

    // the developer's perspective, the error is uncaught.

    //

    // To preserve the expected "Pause on exceptions" behavior, we don't use a

    // try-catch in DEV. Instead, we synchronously dispatch a fake event to a fake

    // DOM node, and call the user-provided callback from inside an event handler

    // for that fake event. If the callback throws, the error is "captured" using

    // a global event handler. But because the error happens in a different

    // event loop context, it does not interrupt the normal program flow.

    // Effectively, this gives us try-catch behavior without actually using

    // try-catch. Neat!

    // Check that the browser supports the APIs we need to implement our special

    // DEV version of invokeGuardedCallback

    if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {

      var fakeNode = document.createElement('react');

      var invokeGuardedCallbackDev = function (name, func, context, a, b, c, d, e, f) {

        // If document doesn't exist we know for sure we will crash in this method

        // when we call document.createEvent(). However this can cause confusing

        // errors: https://github.com/facebookincubator/create-react-app/issues/3482

        // So we preemptively throw with a better message instead.

            throw Error( "The `document` global was defined when React was initialized, but is not defined anymore. This can happen in a test environment if a component schedules an update from an asynchronous callback, but the test has already finished running. To solve this, you can either unmount the component at the end of your test (and ensure that any asynchronous operations get canceled in `componentWillUnmount`), or you can change the test itself to be asynchronous." );

          }

        }

        var evt = document.createEvent('Event'); // Keeps track of whether the user-provided callback threw an error. We

        // set this to true at the beginning, then set it to false right after

        // calling the function. If the function errors, `didError` will never be

        // set to false. This strategy works even if the browser is flaky and

        // fails to call our global error handler, because it doesn't rely on

        // the error event at all.

        var didError = true; // Keeps track of the value of window.event so that we can reset it

        // during the callback to let user code access window.event in the

        // browsers that support it.

        var windowEvent = window.event; // Keeps track of the descriptor of window.event to restore it after event

        // dispatching: https://github.com/facebook/react/issues/13688

        var windowEventDescriptor = Object.getOwnPropertyDescriptor(window, 'event'); // Create an event handler for our fake event. We will synchronously

        // dispatch our fake event using `dispatchEvent`. Inside the handler, we

        // call the user-provided callback.

        var funcArgs = Array.prototype.slice.call(arguments, 3);

        function callCallback() {

          // We immediately remove the callback from event listeners so that

          // nested `invokeGuardedCallback` calls do not clash. Otherwise, a

          // nested call would trigger the fake event handlers of any call higher

          // in the stack.

          fakeNode.removeEventListener(evtType, callCallback, false); // We check for window.hasOwnProperty('event') to prevent the

          // window.event assignment in both IE <= 10 as they throw an error

          // "Member not found" in strict mode, and in Firefox which does not

          // support window.event.

          if (typeof window.event !== 'undefined' && window.hasOwnProperty('event')) {

            window.event = windowEvent;

          }

          func.apply(context, funcArgs);

          didError = false;

        } // Create a global error event handler. We use this to capture the value

        // that was thrown. It's possible that this error handler will fire more

        // than once; for example, if non-React code also calls `dispatchEvent`

        // and a handler for that event throws. We should be resilient to most of

        // those cases. Even if our error event handler fires more than once, the

        // last error event is always used. If the callback actually does error,

        // we know that the last error event is the correct one, because it's not

        // possible for anything else to have happened in between our callback

        // erroring and the code that follows the `dispatchEvent` call below. If

        // the callback doesn't error, but the error event was fired, we know to

        // ignore it because `didError` will be false, as described above.

        var error; // Use this to track whether the error event is ever called.

        var didSetError = false;

        var isCrossOriginError = false;

        function handleWindowError(event) {

          error = event.error;

          didSetError = true;

          if (error === null && event.colno === 0 && event.lineno === 0) {

            isCrossOriginError = true;

          }

          if (event.defaultPrevented) {

            // Some other error handler has prevented default.

            // Browsers silence the error report if this happens.

            // We'll remember this to later decide whether to log it or not.

            if (error != null && typeof error === 'object') {

              try {

                error._suppressLogging = true;

              } catch (inner) {// Ignore.

              }

            }

          }

        } // Create a fake event type.

        var evtType = "react-" + (name ? name : 'invokeguardedcallback'); // Attach our event handlers

        window.addEventListener('error', handleWindowError);

        fakeNode.addEventListener(evtType, callCallback, false); // Synchronously dispatch our fake event. If the user-provided function

        // errors, it will trigger our global error handler.

        evt.initEvent(evtType, false, false);

        fakeNode.dispatchEvent(evt);

        if (windowEventDescriptor) {

          Object.defineProperty(window, 'event', windowEventDescriptor);

        }

        if (didError) {

          if (!didSetError) {

            // The callback errored, but the error event never fired.

            error = new Error('An error was thrown inside one of your components, but React ' + "doesn't know what it was. This is likely due to browser " + 'flakiness. React does its best to preserve the "Pause on ' + 'exceptions" behavior of the DevTools, which requires some ' + "DEV-mode only tricks. It's possible that these don't work in " + 'your browser. Try triggering the error in production mode, ' + 'or switching to a modern browser. If you suspect that this is ' + 'actually an issue with React, please file an issue.');

          } else if (isCrossOriginError) {

            error = new Error("A cross-origin error was thrown. React doesn't have access to " + 'the actual error object in development. ' + 'See https://fb.me/react-crossorigin-error for more information.');

          }

          this.onError(error);

        } // Remove our event listeners

        window.removeEventListener('error', handleWindowError);

      };

      invokeGuardedCallbackImpl = invokeGuardedCallbackDev;

    }

  }

  var invokeGuardedCallbackImpl$1 = invokeGuardedCallbackImpl;

  var hasError = false;

  var caughtError = null; // Used by event system to capture/rethrow the first error.

  var hasRethrowError = false;

  var rethrowError = null;

  var reporter = {

    onError: function (error) {

      hasError = true;

      caughtError = error;

    }

  };

  /**

   * Call a function while guarding against errors that happens within it.

   * Returns an error if it throws, otherwise null.

   *

   * In production, this is implemented using a try-catch. The reason we don't

   * use a try-catch directly is so that we can swap out a different

   * implementation in DEV mode.

   *

   * @param {String} name of the guard to use for logging or debugging

   * @param {Function} func The function to invoke

   * @param {*} context The context to use when calling the function

   * @param {...*} args Arguments for function

   */

  function invokeGuardedCallback(name, func, context, a, b, c, d, e, f) {

    invokeGuardedCallbackImpl$1.apply(reporter, arguments);

  }

  /**

   * Same as invokeGuardedCallback, but instead of returning an error, it stores

   * it in a global so it can be rethrown by `rethrowCaughtError` later.

   * TODO: See if caughtError and rethrowError can be unified.

   *

   * @param {String} name of the guard to use for logging or debugging

   * @param {Function} func The function to invoke

   * @param {*} context The context to use when calling the function

   * @param {...*} args Arguments for function

   */

  function invokeGuardedCallbackAndCatchFirstError(name, func, context, a, b, c, d, e, f) {

    invokeGuardedCallback.apply(this, arguments);

    if (hasError) {

      var error = clearCaughtError();

      if (!hasRethrowError) {

        hasRethrowError = true;

        rethrowError = error;

      }

    }

  }

  /**

   * During execution of guarded functions we will capture the first error which

   * we will rethrow to be handled by the top level error handler.

   */

  function rethrowCaughtError() {

    if (hasRethrowError) {

      var error = rethrowError;

      hasRethrowError = false;

      rethrowError = null;

      throw error;

    }

  }

  function hasCaughtError() {

    return hasError;

  }

  function clearCaughtError() {

    if (hasError) {

      var error = caughtError;

      hasError = false;

      caughtError = null;

      return error;

    } else {

      {

        {

          throw Error( "clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue." );

        }

      }

    }

  }

  var getFiberCurrentPropsFromNode = null;

  var getInstanceFromNode = null;

  var getNodeFromInstance = null;

  function setComponentTree(getFiberCurrentPropsFromNodeImpl, getInstanceFromNodeImpl, getNodeFromInstanceImpl) {

    getFiberCurrentPropsFromNode = getFiberCurrentPropsFromNodeImpl;

    getInstanceFromNode = getInstanceFromNodeImpl;

    getNodeFromInstance = getNodeFromInstanceImpl;

    {

      if (!getNodeFromInstance || !getInstanceFromNode) {

        error('EventPluginUtils.setComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.');

      }

    }

  }

  var validateEventDispatches;

    validateEventDispatches = function (event) {

      var dispatchListeners = event._dispatchListeners;

      var dispatchInstances = event._dispatchInstances;

      var listenersIsArr = Array.isArray(dispatchListeners);

      var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;

      var instancesIsArr = Array.isArray(dispatchInstances);

      var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;

      if (instancesIsArr !== listenersIsArr || instancesLen !== listenersLen) {

        error('EventPluginUtils: Invalid `event`.');

      }

    };

  }

  /**

   * Dispatch the event to the listener.

   * @param {SyntheticEvent} event SyntheticEvent to handle

   * @param {function} listener Application-level callback

   * @param {*} inst Internal component instance

   */

  function executeDispatch(event, listener, inst) {

    var type = event.type || 'unknown-event';

    event.currentTarget = getNodeFromInstance(inst);

    invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);

    event.currentTarget = null;

  }

  /**

   * Standard/simple iteration through an event's collected dispatches.

   */

  function executeDispatchesInOrder(event) {

    {

      validateEventDispatches(event);

    }

    if (Array.isArray(dispatchListeners)) {

      for (var i = 0; i < dispatchListeners.length; i++) {

        if (event.isPropagationStopped()) {

          break;

        } // Listeners and Instances are two parallel arrays that are always in sync.

        executeDispatch(event, dispatchListeners[i], dispatchInstances[i]);

      }

    } else if (dispatchListeners) {

      executeDispatch(event, dispatchListeners, dispatchInstances);

    }

    event._dispatchListeners = null;

    event._dispatchInstances = null;

  }

  var FunctionComponent = 0;

  var ClassComponent = 1;

  var IndeterminateComponent = 2; // Before we know whether it is function or class

  var HostRoot = 3; // Root of a host tree. Could be nested inside another node.

  var HostPortal = 4; // A subtree. Could be an entry point to a different renderer.

  var HostComponent = 5;

  var HostText = 6;

  var Fragment = 7;

  var Mode = 8;

  var ContextConsumer = 9;

  var ContextProvider = 10;

  var ForwardRef = 11;

  var Profiler = 12;

  var SuspenseComponent = 13;

  var MemoComponent = 14;

  var SimpleMemoComponent = 15;

  var LazyComponent = 16;

  var IncompleteClassComponent = 17;

  var DehydratedFragment = 18;

  var SuspenseListComponent = 19;

  var FundamentalComponent = 20;

  var ScopeComponent = 21;

  var Block = 22;

  /**

   * Injectable ordering of event plugins.

   */

  var eventPluginOrder = null;

  /**

   * Injectable mapping from names to event plugin modules.

   */

  var namesToPlugins = {};

  /**

   * Recomputes the plugin list using the injected plugins and plugin ordering.

   *

   * @private

   */

  function recomputePluginOrdering() {

    if (!eventPluginOrder) {

      // Wait until an `eventPluginOrder` is injected.

      return;

    }

    for (var pluginName in namesToPlugins) {

      var pluginModule = namesToPlugins[pluginName];

      var pluginIndex = eventPluginOrder.indexOf(pluginName);

      if (!(pluginIndex > -1)) {

        {

          throw Error( "EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `" + pluginName + "`." );

        }

      }

      if (plugins[pluginIndex]) {

        continue;

      }

      if (!pluginModule.extractEvents) {

        {

          throw Error( "EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `" + pluginName + "` does not." );

        }

      }

      plugins[pluginIndex] = pluginModule;

      var publishedEvents = pluginModule.eventTypes;

      for (var eventName in publishedEvents) {

        if (!publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName)) {

          {

            throw Error( "EventPluginRegistry: Failed to publish event `" + eventName + "` for plugin `" + pluginName + "`." );

          }

        }

      }

    }

  }

  /**

   * Publishes an event so that it can be dispatched by the supplied plugin.