/** @license React v16.8.6 * react-dom.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'; (function (global, factory) {    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('react')) :        typeof define === 'function' && define.amd ? define(['react'], factory) :            (global.ReactDOM = factory(global.React));}(this, (function (React) {    'use strict';     /**     * Use invariant() to assert state which your program assumes to be true.     *     * Provide sprintf-style format (only %s is supported) and arguments     * to provide information about what broke and what you were     * expecting.     *     * The invariant message will be stripped in production, but the invariant     * will remain to ensure logic does not differ in production.     */     var validateFormat = function () { };     {        validateFormat = function (format) {            if (format === undefined) {                throw new Error('invariant requires an error message argument');            }        };    }     function invariant(condition, format, a, b, c, d, e, f) {        validateFormat(format);         if (!condition) {            var error = void 0;            if (format === undefined) {                error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');            } else {                var args = [a, b, c, d, e, f];                var argIndex = 0;                error = new Error(format.replace(/%s/g, function () {                    return args[argIndex++];                }));                error.name = 'Invariant Violation';            }             error.framesToPop = 1; // we don't care about invariant's own frame            throw error;        }    }     // Relying on the `invariant()` implementation lets us    // preserve the format and params in the www builds.     !React ? invariant(false, 'ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM.') : void 0;     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.                !(typeof document !== 'undefined') ? invariant(false, '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.') : void 0;                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 = void 0;                // 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;     // Used by Fiber to simulate a try-catch.    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) {        hasError = false;        caughtError = null;        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 {            invariant(false, 'clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue.');        }    }     /**     * 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);            !(pluginIndex > -1) ? invariant(false, 'EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.', pluginName) : void 0;            if (plugins[pluginIndex]) {                continue;            }            !pluginModule.extractEvents ? invariant(false, 'EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.', pluginName) : void 0;            plugins[pluginIndex] = pluginModule;            var publishedEvents = pluginModule.eventTypes;            for (var eventName in publishedEvents) {                !publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? invariant(false, 'EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.', eventName, pluginName) : void 0;            }        }    }     /**     * Publishes an event so that it can be dispatched by the supplied plugin.     *     * @param {object} dispatchConfig Dispatch configuration for the event.     * @param {object} PluginModule Plugin publishing the event.     * @return {boolean} True if the event was successfully published.     * @private     */    function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {        !!eventNameDispatchConfigs.hasOwnProperty(eventName) ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.', eventName) : void 0;        eventNameDispatchConfigs[eventName] = dispatchConfig;         var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;        if (phasedRegistrationNames) {            for (var phaseName in phasedRegistrationNames) {                if (phasedRegistrationNames.hasOwnProperty(phaseName)) {                    var phasedRegistrationName = phasedRegistrationNames[phaseName];                    publishRegistrationName(phasedRegistrationName, pluginModule, eventName);                }            }            return true;        } else if (dispatchConfig.registrationName) {            publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);            return true;        }        return false;    }     /**     * Publishes a registration name that is used to identify dispatched events.     *     * @param {string} registrationName Registration name to add.     * @param {object} PluginModule Plugin publishing the event.     * @private     */    function publishRegistrationName(registrationName, pluginModule, eventName) {        !!registrationNameModules[registrationName] ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.', registrationName) : void 0;        registrationNameModules[registrationName] = pluginModule;        registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;         {            var lowerCasedName = registrationName.toLowerCase();            possibleRegistrationNames[lowerCasedName] = registrationName;             if (registrationName === 'onDoubleClick') {                possibleRegistrationNames.ondblclick = registrationName;            }        }    }     /**     * Registers plugins so that they can extract and dispatch events.     *     * @see {EventPluginHub}     */     /**     * Ordered list of injected plugins.     */    var plugins = [];     /**     * Mapping from event name to dispatch config     */    var eventNameDispatchConfigs = {};     /**     * Mapping from registration name to plugin module     */    var registrationNameModules = {};     /**     * Mapping from registration name to event name     */    var registrationNameDependencies = {};     /**     * Mapping from lowercase registration names to the properly cased version,     * used to warn in the case of missing event handlers. Available     * only in true.     * @type {Object}     */    var possibleRegistrationNames = {};    // Trust the developer to only use possibleRegistrationNames in true     /**     * Injects an ordering of plugins (by plugin name). This allows the ordering     * to be decoupled from injection of the actual plugins so that ordering is     * always deterministic regardless of packaging, on-the-fly injection, etc.     *     * @param {array} InjectedEventPluginOrder     * @internal     * @see {EventPluginHub.injection.injectEventPluginOrder}     */    function injectEventPluginOrder(injectedEventPluginOrder) {        !!eventPluginOrder ? invariant(false, 'EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.') : void 0;        // Clone the ordering so it cannot be dynamically mutated.        eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);        recomputePluginOrdering();    }     /**     * Injects plugins to be used by `EventPluginHub`. The plugin names must be     * in the ordering injected by `injectEventPluginOrder`.     *     * Plugins can be injected as part of page initialization or on-the-fly.     *     * @param {object} injectedNamesToPlugins Map from names to plugin modules.     * @internal     * @see {EventPluginHub.injection.injectEventPluginsByName}     */    function injectEventPluginsByName(injectedNamesToPlugins) {        var isOrderingDirty = false;        for (var pluginName in injectedNamesToPlugins) {            if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {                continue;            }            var pluginModule = injectedNamesToPlugins[pluginName];            if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {                !!namesToPlugins[pluginName] ? invariant(false, 'EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.', pluginName) : void 0;                namesToPlugins[pluginName] = pluginModule;                isOrderingDirty = true;            }        }        if (isOrderingDirty) {            recomputePluginOrdering();        }    }     /**     * 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 = 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

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