+ );
+ }
+}
+
+export default App;
diff --git a/src/app/components/Navigation.js b/src/app/components/Navigation.js
new file mode 100644
index 0000000..e822343
--- /dev/null
+++ b/src/app/components/Navigation.js
@@ -0,0 +1,15 @@
+import React from "react";
+
+const Navigation = () => {
+ return (
+
+ );
+};
+
+export default Navigation;
diff --git a/src/app/index.js b/src/app/index.js
new file mode 100644
index 0000000..567b638
--- /dev/null
+++ b/src/app/index.js
@@ -0,0 +1,5 @@
+import React from 'react'
+import {render} from 'react-dom'
+import App from './components/App'
+
+render(,document.getElementById('app'));
\ No newline at end of file
diff --git a/src/client/.gitkeep b/src/client/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/src/database/database.js b/src/database/database.js
new file mode 100644
index 0000000..06fbf73
--- /dev/null
+++ b/src/database/database.js
@@ -0,0 +1,12 @@
+const mongoose = require ('mongoose');
+
+
+const URI = 'mongodb://localhost/mern-crud';
+
+
+mongoose.connect(URI)
+ .then(db => console.log('DB IS CONNECTED!!'))
+ .catch(err => console.log(err));
+
+
+ module.exports = mongoose;
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 0000000..497341d
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,23 @@
+const express = require ('express');
+const app = express();
+const path = require('path');
+const morgan = require('morgan');
+const {mongoose} = require ('./database/database');
+
+
+app.set('port',process.env.PORT || 3000);
+
+
+app.use(morgan('dev'));
+app.use(express.json());
+
+
+app.use('/api/tasks',require('./routes/task.routes'))
+
+
+app.use(express.static(path.join(__dirname,'public')));
+
+
+app.listen(app.get('port'),()=>{
+ console.log(`Server on port ${app.get('port')}`);
+});
diff --git a/src/models/task.js b/src/models/task.js
new file mode 100644
index 0000000..d2654fb
--- /dev/null
+++ b/src/models/task.js
@@ -0,0 +1,11 @@
+const mongoose = require('mongoose');
+const {Schema} = mongoose
+
+
+const TaskSchema = new Schema ({
+ name:{type : String,required:true},
+ category:{type:String,required:true}
+});
+
+
+module.exports = mongoose.model('Task',TaskSchema)
\ No newline at end of file
diff --git a/src/public/bundle.js b/src/public/bundle.js
new file mode 100644
index 0000000..e71f79f
--- /dev/null
+++ b/src/public/bundle.js
@@ -0,0 +1,268 @@
+/******/ (function(modules) { // webpackBootstrap
+/******/ // The module cache
+/******/ var installedModules = {};
+/******/
+/******/ // The require function
+/******/ function __webpack_require__(moduleId) {
+/******/
+/******/ // Check if module is in cache
+/******/ if(installedModules[moduleId]) {
+/******/ return installedModules[moduleId].exports;
+/******/ }
+/******/ // Create a new module (and put it into the cache)
+/******/ var module = installedModules[moduleId] = {
+/******/ i: moduleId,
+/******/ l: false,
+/******/ exports: {}
+/******/ };
+/******/
+/******/ // Execute the module function
+/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ // Flag the module as loaded
+/******/ module.l = true;
+/******/
+/******/ // Return the exports of the module
+/******/ return module.exports;
+/******/ }
+/******/
+/******/
+/******/ // expose the modules object (__webpack_modules__)
+/******/ __webpack_require__.m = modules;
+/******/
+/******/ // expose the module cache
+/******/ __webpack_require__.c = installedModules;
+/******/
+/******/ // define getter function for harmony exports
+/******/ __webpack_require__.d = function(exports, name, getter) {
+/******/ if(!__webpack_require__.o(exports, name)) {
+/******/ Object.defineProperty(exports, name, { enumerable: true, get: getter });
+/******/ }
+/******/ };
+/******/
+/******/ // define __esModule on exports
+/******/ __webpack_require__.r = function(exports) {
+/******/ if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
+/******/ Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
+/******/ }
+/******/ Object.defineProperty(exports, '__esModule', { value: true });
+/******/ };
+/******/
+/******/ // create a fake namespace object
+/******/ // mode & 1: value is a module id, require it
+/******/ // mode & 2: merge all properties of value into the ns
+/******/ // mode & 4: return value when already ns object
+/******/ // mode & 8|1: behave like require
+/******/ __webpack_require__.t = function(value, mode) {
+/******/ if(mode & 1) value = __webpack_require__(value);
+/******/ if(mode & 8) return value;
+/******/ if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
+/******/ var ns = Object.create(null);
+/******/ __webpack_require__.r(ns);
+/******/ Object.defineProperty(ns, 'default', { enumerable: true, value: value });
+/******/ if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
+/******/ return ns;
+/******/ };
+/******/
+/******/ // getDefaultExport function for compatibility with non-harmony modules
+/******/ __webpack_require__.n = function(module) {
+/******/ var getter = module && module.__esModule ?
+/******/ function getDefault() { return module['default']; } :
+/******/ function getModuleExports() { return module; };
+/******/ __webpack_require__.d(getter, 'a', getter);
+/******/ return getter;
+/******/ };
+/******/
+/******/ // Object.prototype.hasOwnProperty.call
+/******/ __webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
+/******/
+/******/ // __webpack_public_path__
+/******/ __webpack_require__.p = "";
+/******/
+/******/
+/******/ // Load entry module and return exports
+/******/ return __webpack_require__(__webpack_require__.s = "./src/app/index.js");
+/******/ })
+/************************************************************************/
+/******/ ({
+
+/***/ "./node_modules/object-assign/index.js":
+/*!*********************************************!*\
+ !*** ./node_modules/object-assign/index.js ***!
+ \*********************************************/
+/*! no static exports found */
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+eval("/*\nobject-assign\n(c) Sindre Sorhus\n@license MIT\n*/\n\n\n/* eslint-disable no-unused-vars */\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar hasOwnProperty = Object.prototype.hasOwnProperty;\nvar propIsEnumerable = Object.prototype.propertyIsEnumerable;\n\nfunction toObject(val) {\n\tif (val === null || val === undefined) {\n\t\tthrow new TypeError('Object.assign cannot be called with null or undefined');\n\t}\n\n\treturn Object(val);\n}\n\nfunction shouldUseNative() {\n\ttry {\n\t\tif (!Object.assign) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Detect buggy property enumeration order in older V8 versions.\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=4118\n\t\tvar test1 = new String('abc'); // eslint-disable-line no-new-wrappers\n\t\ttest1[5] = 'de';\n\t\tif (Object.getOwnPropertyNames(test1)[0] === '5') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test2 = {};\n\t\tfor (var i = 0; i < 10; i++) {\n\t\t\ttest2['_' + String.fromCharCode(i)] = i;\n\t\t}\n\t\tvar order2 = Object.getOwnPropertyNames(test2).map(function (n) {\n\t\t\treturn test2[n];\n\t\t});\n\t\tif (order2.join('') !== '0123456789') {\n\t\t\treturn false;\n\t\t}\n\n\t\t// https://bugs.chromium.org/p/v8/issues/detail?id=3056\n\t\tvar test3 = {};\n\t\t'abcdefghijklmnopqrst'.split('').forEach(function (letter) {\n\t\t\ttest3[letter] = letter;\n\t\t});\n\t\tif (Object.keys(Object.assign({}, test3)).join('') !==\n\t\t\t\t'abcdefghijklmnopqrst') {\n\t\t\treturn false;\n\t\t}\n\n\t\treturn true;\n\t} catch (err) {\n\t\t// We don't expect any of the above to throw, but better to be safe.\n\t\treturn false;\n\t}\n}\n\nmodule.exports = shouldUseNative() ? Object.assign : function (target, source) {\n\tvar from;\n\tvar to = toObject(target);\n\tvar symbols;\n\n\tfor (var s = 1; s < arguments.length; s++) {\n\t\tfrom = Object(arguments[s]);\n\n\t\tfor (var key in from) {\n\t\t\tif (hasOwnProperty.call(from, key)) {\n\t\t\t\tto[key] = from[key];\n\t\t\t}\n\t\t}\n\n\t\tif (getOwnPropertySymbols) {\n\t\t\tsymbols = getOwnPropertySymbols(from);\n\t\t\tfor (var i = 0; i < symbols.length; i++) {\n\t\t\t\tif (propIsEnumerable.call(from, symbols[i])) {\n\t\t\t\t\tto[symbols[i]] = from[symbols[i]];\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\treturn to;\n};\n\n\n//# sourceURL=webpack:///./node_modules/object-assign/index.js?");
+
+/***/ }),
+
+/***/ "./node_modules/prop-types/checkPropTypes.js":
+/*!***************************************************!*\
+ !*** ./node_modules/prop-types/checkPropTypes.js ***!
+ \***************************************************/
+/*! no static exports found */
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+eval("/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n\n\nvar printWarning = function() {};\n\nif (true) {\n var ReactPropTypesSecret = __webpack_require__(/*! ./lib/ReactPropTypesSecret */ \"./node_modules/prop-types/lib/ReactPropTypesSecret.js\");\n var loggedTypeFailures = {};\n\n printWarning = function(text) {\n var message = 'Warning: ' + text;\n if (typeof console !== 'undefined') {\n console.error(message);\n }\n try {\n // --- Welcome to debugging React ---\n // This error was thrown as a convenience so that you can use this stack\n // to find the callsite that caused this warning to fire.\n throw new Error(message);\n } catch (x) {}\n };\n}\n\n/**\n * Assert that the values match with the type specs.\n * Error messages are memorized and will only be shown once.\n *\n * @param {object} typeSpecs Map of name to a ReactPropType\n * @param {object} values Runtime values that need to be type-checked\n * @param {string} location e.g. \"prop\", \"context\", \"child context\"\n * @param {string} componentName Name of the component for error messages.\n * @param {?Function} getStack Returns the component stack.\n * @private\n */\nfunction checkPropTypes(typeSpecs, values, location, componentName, getStack) {\n if (true) {\n for (var typeSpecName in typeSpecs) {\n if (typeSpecs.hasOwnProperty(typeSpecName)) {\n var error;\n // Prop type validation may throw. In case they do, we don't want to\n // fail the render phase where it didn't fail before. So we log it.\n // After these have been cleaned up, we'll let them throw.\n try {\n // This is intentionally an invariant that gets caught. It's the same\n // behavior as without this statement except with a better message.\n if (typeof typeSpecs[typeSpecName] !== 'function') {\n var err = Error(\n (componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' +\n 'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.'\n );\n err.name = 'Invariant Violation';\n throw err;\n }\n error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);\n } catch (ex) {\n error = ex;\n }\n if (error && !(error instanceof Error)) {\n printWarning(\n (componentName || 'React class') + ': type specification of ' +\n location + ' `' + typeSpecName + '` is invalid; the type checker ' +\n 'function must return `null` or an `Error` but returned a ' + typeof error + '. ' +\n 'You may have forgotten to pass an argument to the type checker ' +\n 'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' +\n 'shape all require an argument).'\n )\n\n }\n if (error instanceof Error && !(error.message in loggedTypeFailures)) {\n // Only monitor this failure once because there tends to be a lot of the\n // same error.\n loggedTypeFailures[error.message] = true;\n\n var stack = getStack ? getStack() : '';\n\n printWarning(\n 'Failed ' + location + ' type: ' + error.message + (stack != null ? stack : '')\n );\n }\n }\n }\n }\n}\n\nmodule.exports = checkPropTypes;\n\n\n//# sourceURL=webpack:///./node_modules/prop-types/checkPropTypes.js?");
+
+/***/ }),
+
+/***/ "./node_modules/prop-types/lib/ReactPropTypesSecret.js":
+/*!*************************************************************!*\
+ !*** ./node_modules/prop-types/lib/ReactPropTypesSecret.js ***!
+ \*************************************************************/
+/*! no static exports found */
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+eval("/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n\n\nvar ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';\n\nmodule.exports = ReactPropTypesSecret;\n\n\n//# sourceURL=webpack:///./node_modules/prop-types/lib/ReactPropTypesSecret.js?");
+
+/***/ }),
+
+/***/ "./node_modules/react-dom/cjs/react-dom.development.js":
+/*!*************************************************************!*\
+ !*** ./node_modules/react-dom/cjs/react-dom.development.js ***!
+ \*************************************************************/
+/*! no static exports found */
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+eval("/** @license React v16.7.0\n * react-dom.development.js\n *\n * Copyright (c) Facebook, Inc. and its affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n\n\n\n\nif (true) {\n (function() {\n'use strict';\n\nvar React = __webpack_require__(/*! react */ \"./node_modules/react/index.js\");\nvar _assign = __webpack_require__(/*! object-assign */ \"./node_modules/object-assign/index.js\");\nvar checkPropTypes = __webpack_require__(/*! prop-types/checkPropTypes */ \"./node_modules/prop-types/checkPropTypes.js\");\nvar scheduler = __webpack_require__(/*! scheduler */ \"./node_modules/scheduler/index.js\");\nvar tracing = __webpack_require__(/*! scheduler/tracing */ \"./node_modules/scheduler/tracing.js\");\n\n/**\n * Use invariant() to assert state which your program assumes to be true.\n *\n * Provide sprintf-style format (only %s is supported) and arguments\n * to provide information about what broke and what you were\n * expecting.\n *\n * The invariant message will be stripped in production, but the invariant\n * will remain to ensure logic does not differ in production.\n */\n\nvar validateFormat = function () {};\n\n{\n validateFormat = function (format) {\n if (format === undefined) {\n throw new Error('invariant requires an error message argument');\n }\n };\n}\n\nfunction invariant(condition, format, a, b, c, d, e, f) {\n validateFormat(format);\n\n if (!condition) {\n var error = void 0;\n if (format === undefined) {\n error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');\n } else {\n var args = [a, b, c, d, e, f];\n var argIndex = 0;\n error = new Error(format.replace(/%s/g, function () {\n return args[argIndex++];\n }));\n error.name = 'Invariant Violation';\n }\n\n error.framesToPop = 1; // we don't care about invariant's own frame\n throw error;\n }\n}\n\n// Relying on the `invariant()` implementation lets us\n// preserve the format and params in the www builds.\n\n!React ? invariant(false, 'ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM.') : void 0;\n\nvar invokeGuardedCallbackImpl = function (name, func, context, a, b, c, d, e, f) {\n var funcArgs = Array.prototype.slice.call(arguments, 3);\n try {\n func.apply(context, funcArgs);\n } catch (error) {\n this.onError(error);\n }\n};\n\n{\n // In DEV mode, we swap out invokeGuardedCallback for a special version\n // that plays more nicely with the browser's DevTools. The idea is to preserve\n // \"Pause on exceptions\" behavior. Because React wraps all user-provided\n // functions in invokeGuardedCallback, and the production version of\n // invokeGuardedCallback uses a try-catch, all user exceptions are treated\n // like caught exceptions, and the DevTools won't pause unless the developer\n // takes the extra step of enabling pause on caught exceptions. This is\n // untintuitive, though, because even though React has caught the error, from\n // the developer's perspective, the error is uncaught.\n //\n // To preserve the expected \"Pause on exceptions\" behavior, we don't use a\n // try-catch in DEV. Instead, we synchronously dispatch a fake event to a fake\n // DOM node, and call the user-provided callback from inside an event handler\n // for that fake event. If the callback throws, the error is \"captured\" using\n // a global event handler. But because the error happens in a different\n // event loop context, it does not interrupt the normal program flow.\n // Effectively, this gives us try-catch behavior without actually using\n // try-catch. Neat!\n\n // Check that the browser supports the APIs we need to implement our special\n // DEV version of invokeGuardedCallback\n if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {\n var fakeNode = document.createElement('react');\n\n var invokeGuardedCallbackDev = function (name, func, context, a, b, c, d, e, f) {\n // If document doesn't exist we know for sure we will crash in this method\n // when we call document.createEvent(). However this can cause confusing\n // errors: https://github.com/facebookincubator/create-react-app/issues/3482\n // So we preemptively throw with a better message instead.\n !(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;\n var evt = document.createEvent('Event');\n\n // Keeps track of whether the user-provided callback threw an error. We\n // set this to true at the beginning, then set it to false right after\n // calling the function. If the function errors, `didError` will never be\n // set to false. This strategy works even if the browser is flaky and\n // fails to call our global error handler, because it doesn't rely on\n // the error event at all.\n var didError = true;\n\n // Keeps track of the value of window.event so that we can reset it\n // during the callback to let user code access window.event in the\n // browsers that support it.\n var windowEvent = window.event;\n\n // Keeps track of the descriptor of window.event to restore it after event\n // dispatching: https://github.com/facebook/react/issues/13688\n var windowEventDescriptor = Object.getOwnPropertyDescriptor(window, 'event');\n\n // Create an event handler for our fake event. We will synchronously\n // dispatch our fake event using `dispatchEvent`. Inside the handler, we\n // call the user-provided callback.\n var funcArgs = Array.prototype.slice.call(arguments, 3);\n function callCallback() {\n // We immediately remove the callback from event listeners so that\n // nested `invokeGuardedCallback` calls do not clash. Otherwise, a\n // nested call would trigger the fake event handlers of any call higher\n // in the stack.\n fakeNode.removeEventListener(evtType, callCallback, false);\n\n // We check for window.hasOwnProperty('event') to prevent the\n // window.event assignment in both IE <= 10 as they throw an error\n // \"Member not found\" in strict mode, and in Firefox which does not\n // support window.event.\n if (typeof window.event !== 'undefined' && window.hasOwnProperty('event')) {\n window.event = windowEvent;\n }\n\n func.apply(context, funcArgs);\n didError = false;\n }\n\n // Create a global error event handler. We use this to capture the value\n // that was thrown. It's possible that this error handler will fire more\n // than once; for example, if non-React code also calls `dispatchEvent`\n // and a handler for that event throws. We should be resilient to most of\n // those cases. Even if our error event handler fires more than once, the\n // last error event is always used. If the callback actually does error,\n // we know that the last error event is the correct one, because it's not\n // possible for anything else to have happened in between our callback\n // erroring and the code that follows the `dispatchEvent` call below. If\n // the callback doesn't error, but the error event was fired, we know to\n // ignore it because `didError` will be false, as described above.\n var error = void 0;\n // Use this to track whether the error event is ever called.\n var didSetError = false;\n var isCrossOriginError = false;\n\n function handleWindowError(event) {\n error = event.error;\n didSetError = true;\n if (error === null && event.colno === 0 && event.lineno === 0) {\n isCrossOriginError = true;\n }\n if (event.defaultPrevented) {\n // Some other error handler has prevented default.\n // Browsers silence the error report if this happens.\n // We'll remember this to later decide whether to log it or not.\n if (error != null && typeof error === 'object') {\n try {\n error._suppressLogging = true;\n } catch (inner) {\n // Ignore.\n }\n }\n }\n }\n\n // Create a fake event type.\n var evtType = 'react-' + (name ? name : 'invokeguardedcallback');\n\n // Attach our event handlers\n window.addEventListener('error', handleWindowError);\n fakeNode.addEventListener(evtType, callCallback, false);\n\n // Synchronously dispatch our fake event. If the user-provided function\n // errors, it will trigger our global error handler.\n evt.initEvent(evtType, false, false);\n fakeNode.dispatchEvent(evt);\n\n if (windowEventDescriptor) {\n Object.defineProperty(window, 'event', windowEventDescriptor);\n }\n\n if (didError) {\n if (!didSetError) {\n // The callback errored, but the error event never fired.\n 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.');\n } else if (isCrossOriginError) {\n 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.');\n }\n this.onError(error);\n }\n\n // Remove our event listeners\n window.removeEventListener('error', handleWindowError);\n };\n\n invokeGuardedCallbackImpl = invokeGuardedCallbackDev;\n }\n}\n\nvar invokeGuardedCallbackImpl$1 = invokeGuardedCallbackImpl;\n\n// Used by Fiber to simulate a try-catch.\nvar hasError = false;\nvar caughtError = null;\n\n// Used by event system to capture/rethrow the first error.\nvar hasRethrowError = false;\nvar rethrowError = null;\n\nvar reporter = {\n onError: function (error) {\n hasError = true;\n caughtError = error;\n }\n};\n\n/**\n * Call a function while guarding against errors that happens within it.\n * Returns an error if it throws, otherwise null.\n *\n * In production, this is implemented using a try-catch. The reason we don't\n * use a try-catch directly is so that we can swap out a different\n * implementation in DEV mode.\n *\n * @param {String} name of the guard to use for logging or debugging\n * @param {Function} func The function to invoke\n * @param {*} context The context to use when calling the function\n * @param {...*} args Arguments for function\n */\nfunction invokeGuardedCallback(name, func, context, a, b, c, d, e, f) {\n hasError = false;\n caughtError = null;\n invokeGuardedCallbackImpl$1.apply(reporter, arguments);\n}\n\n/**\n * Same as invokeGuardedCallback, but instead of returning an error, it stores\n * it in a global so it can be rethrown by `rethrowCaughtError` later.\n * TODO: See if caughtError and rethrowError can be unified.\n *\n * @param {String} name of the guard to use for logging or debugging\n * @param {Function} func The function to invoke\n * @param {*} context The context to use when calling the function\n * @param {...*} args Arguments for function\n */\nfunction invokeGuardedCallbackAndCatchFirstError(name, func, context, a, b, c, d, e, f) {\n invokeGuardedCallback.apply(this, arguments);\n if (hasError) {\n var error = clearCaughtError();\n if (!hasRethrowError) {\n hasRethrowError = true;\n rethrowError = error;\n }\n }\n}\n\n/**\n * During execution of guarded functions we will capture the first error which\n * we will rethrow to be handled by the top level error handler.\n */\nfunction rethrowCaughtError() {\n if (hasRethrowError) {\n var error = rethrowError;\n hasRethrowError = false;\n rethrowError = null;\n throw error;\n }\n}\n\nfunction hasCaughtError() {\n return hasError;\n}\n\nfunction clearCaughtError() {\n if (hasError) {\n var error = caughtError;\n hasError = false;\n caughtError = null;\n return error;\n } else {\n invariant(false, 'clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue.');\n }\n}\n\n/**\n * Injectable ordering of event plugins.\n */\nvar eventPluginOrder = null;\n\n/**\n * Injectable mapping from names to event plugin modules.\n */\nvar namesToPlugins = {};\n\n/**\n * Recomputes the plugin list using the injected plugins and plugin ordering.\n *\n * @private\n */\nfunction recomputePluginOrdering() {\n if (!eventPluginOrder) {\n // Wait until an `eventPluginOrder` is injected.\n return;\n }\n for (var pluginName in namesToPlugins) {\n var pluginModule = namesToPlugins[pluginName];\n var pluginIndex = eventPluginOrder.indexOf(pluginName);\n !(pluginIndex > -1) ? invariant(false, 'EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `%s`.', pluginName) : void 0;\n if (plugins[pluginIndex]) {\n continue;\n }\n !pluginModule.extractEvents ? invariant(false, 'EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `%s` does not.', pluginName) : void 0;\n plugins[pluginIndex] = pluginModule;\n var publishedEvents = pluginModule.eventTypes;\n for (var eventName in publishedEvents) {\n !publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName) ? invariant(false, 'EventPluginRegistry: Failed to publish event `%s` for plugin `%s`.', eventName, pluginName) : void 0;\n }\n }\n}\n\n/**\n * Publishes an event so that it can be dispatched by the supplied plugin.\n *\n * @param {object} dispatchConfig Dispatch configuration for the event.\n * @param {object} PluginModule Plugin publishing the event.\n * @return {boolean} True if the event was successfully published.\n * @private\n */\nfunction publishEventForPlugin(dispatchConfig, pluginModule, eventName) {\n !!eventNameDispatchConfigs.hasOwnProperty(eventName) ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same event name, `%s`.', eventName) : void 0;\n eventNameDispatchConfigs[eventName] = dispatchConfig;\n\n var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;\n if (phasedRegistrationNames) {\n for (var phaseName in phasedRegistrationNames) {\n if (phasedRegistrationNames.hasOwnProperty(phaseName)) {\n var phasedRegistrationName = phasedRegistrationNames[phaseName];\n publishRegistrationName(phasedRegistrationName, pluginModule, eventName);\n }\n }\n return true;\n } else if (dispatchConfig.registrationName) {\n publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);\n return true;\n }\n return false;\n}\n\n/**\n * Publishes a registration name that is used to identify dispatched events.\n *\n * @param {string} registrationName Registration name to add.\n * @param {object} PluginModule Plugin publishing the event.\n * @private\n */\nfunction publishRegistrationName(registrationName, pluginModule, eventName) {\n !!registrationNameModules[registrationName] ? invariant(false, 'EventPluginHub: More than one plugin attempted to publish the same registration name, `%s`.', registrationName) : void 0;\n registrationNameModules[registrationName] = pluginModule;\n registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;\n\n {\n var lowerCasedName = registrationName.toLowerCase();\n possibleRegistrationNames[lowerCasedName] = registrationName;\n\n if (registrationName === 'onDoubleClick') {\n possibleRegistrationNames.ondblclick = registrationName;\n }\n }\n}\n\n/**\n * Registers plugins so that they can extract and dispatch events.\n *\n * @see {EventPluginHub}\n */\n\n/**\n * Ordered list of injected plugins.\n */\nvar plugins = [];\n\n/**\n * Mapping from event name to dispatch config\n */\nvar eventNameDispatchConfigs = {};\n\n/**\n * Mapping from registration name to plugin module\n */\nvar registrationNameModules = {};\n\n/**\n * Mapping from registration name to event name\n */\nvar registrationNameDependencies = {};\n\n/**\n * Mapping from lowercase registration names to the properly cased version,\n * used to warn in the case of missing event handlers. Available\n * only in true.\n * @type {Object}\n */\nvar possibleRegistrationNames = {};\n// Trust the developer to only use possibleRegistrationNames in true\n\n/**\n * Injects an ordering of plugins (by plugin name). This allows the ordering\n * to be decoupled from injection of the actual plugins so that ordering is\n * always deterministic regardless of packaging, on-the-fly injection, etc.\n *\n * @param {array} InjectedEventPluginOrder\n * @internal\n * @see {EventPluginHub.injection.injectEventPluginOrder}\n */\nfunction injectEventPluginOrder(injectedEventPluginOrder) {\n !!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;\n // Clone the ordering so it cannot be dynamically mutated.\n eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);\n recomputePluginOrdering();\n}\n\n/**\n * Injects plugins to be used by `EventPluginHub`. The plugin names must be\n * in the ordering injected by `injectEventPluginOrder`.\n *\n * Plugins can be injected as part of page initialization or on-the-fly.\n *\n * @param {object} injectedNamesToPlugins Map from names to plugin modules.\n * @internal\n * @see {EventPluginHub.injection.injectEventPluginsByName}\n */\nfunction injectEventPluginsByName(injectedNamesToPlugins) {\n var isOrderingDirty = false;\n for (var pluginName in injectedNamesToPlugins) {\n if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {\n continue;\n }\n var pluginModule = injectedNamesToPlugins[pluginName];\n if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {\n !!namesToPlugins[pluginName] ? invariant(false, 'EventPluginRegistry: Cannot inject two different event plugins using the same name, `%s`.', pluginName) : void 0;\n namesToPlugins[pluginName] = pluginModule;\n isOrderingDirty = true;\n }\n }\n if (isOrderingDirty) {\n recomputePluginOrdering();\n }\n}\n\n/**\n * Similar to invariant but only logs a warning if the condition is not met.\n * This can be used to log issues in development environments in critical\n * paths. Removing the logging code for production environments will keep the\n * same logic and follow the same code paths.\n */\n\nvar warningWithoutStack = function () {};\n\n{\n warningWithoutStack = function (condition, format) {\n for (var _len = arguments.length, args = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {\n args[_key - 2] = arguments[_key];\n }\n\n if (format === undefined) {\n throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');\n }\n if (args.length > 8) {\n // Check before the condition to catch violations early.\n throw new Error('warningWithoutStack() currently supports at most 8 arguments.');\n }\n if (condition) {\n return;\n }\n if (typeof console !== 'undefined') {\n var argsWithFormat = args.map(function (item) {\n return '' + item;\n });\n argsWithFormat.unshift('Warning: ' + format);\n\n // We intentionally don't use spread (or .apply) directly because it\n // breaks IE9: https://github.com/facebook/react/issues/13610\n Function.prototype.apply.call(console.error, console, argsWithFormat);\n }\n try {\n // --- Welcome to debugging React ---\n // This error was thrown as a convenience so that you can use this stack\n // to find the callsite that caused this warning to fire.\n var argIndex = 0;\n var message = 'Warning: ' + format.replace(/%s/g, function () {\n return args[argIndex++];\n });\n throw new Error(message);\n } catch (x) {}\n };\n}\n\nvar warningWithoutStack$1 = warningWithoutStack;\n\nvar getFiberCurrentPropsFromNode = null;\nvar getInstanceFromNode = null;\nvar getNodeFromInstance = null;\n\nfunction setComponentTree(getFiberCurrentPropsFromNodeImpl, getInstanceFromNodeImpl, getNodeFromInstanceImpl) {\n getFiberCurrentPropsFromNode = getFiberCurrentPropsFromNodeImpl;\n getInstanceFromNode = getInstanceFromNodeImpl;\n getNodeFromInstance = getNodeFromInstanceImpl;\n {\n !(getNodeFromInstance && getInstanceFromNode) ? warningWithoutStack$1(false, 'EventPluginUtils.setComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.') : void 0;\n }\n}\n\nvar validateEventDispatches = void 0;\n{\n validateEventDispatches = function (event) {\n var dispatchListeners = event._dispatchListeners;\n var dispatchInstances = event._dispatchInstances;\n\n var listenersIsArr = Array.isArray(dispatchListeners);\n var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;\n\n var instancesIsArr = Array.isArray(dispatchInstances);\n var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;\n\n !(instancesIsArr === listenersIsArr && instancesLen === listenersLen) ? warningWithoutStack$1(false, 'EventPluginUtils: Invalid `event`.') : void 0;\n };\n}\n\n/**\n * Dispatch the event to the listener.\n * @param {SyntheticEvent} event SyntheticEvent to handle\n * @param {function} listener Application-level callback\n * @param {*} inst Internal component instance\n */\nfunction executeDispatch(event, listener, inst) {\n var type = event.type || 'unknown-event';\n event.currentTarget = getNodeFromInstance(inst);\n invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);\n event.currentTarget = null;\n}\n\n/**\n * Standard/simple iteration through an event's collected dispatches.\n */\nfunction executeDispatchesInOrder(event) {\n var dispatchListeners = event._dispatchListeners;\n var dispatchInstances = event._dispatchInstances;\n {\n validateEventDispatches(event);\n }\n if (Array.isArray(dispatchListeners)) {\n for (var i = 0; i < dispatchListeners.length; i++) {\n if (event.isPropagationStopped()) {\n break;\n }\n // Listeners and Instances are two parallel arrays that are always in sync.\n executeDispatch(event, dispatchListeners[i], dispatchInstances[i]);\n }\n } else if (dispatchListeners) {\n executeDispatch(event, dispatchListeners, dispatchInstances);\n }\n event._dispatchListeners = null;\n event._dispatchInstances = null;\n}\n\n/**\n * @see executeDispatchesInOrderStopAtTrueImpl\n */\n\n\n/**\n * Execution of a \"direct\" dispatch - there must be at most one dispatch\n * accumulated on the event or it is considered an error. It doesn't really make\n * sense for an event with multiple dispatches (bubbled) to keep track of the\n * return values at each dispatch execution, but it does tend to make sense when\n * dealing with \"direct\" dispatches.\n *\n * @return {*} The return value of executing the single dispatch.\n */\n\n\n/**\n * @param {SyntheticEvent} event\n * @return {boolean} True iff number of dispatches accumulated is greater than 0.\n */\n\n/**\n * Accumulates items that must not be null or undefined into the first one. This\n * is used to conserve memory by avoiding array allocations, and thus sacrifices\n * API cleanness. Since `current` can be null before being passed in and not\n * null after this function, make sure to assign it back to `current`:\n *\n * `a = accumulateInto(a, b);`\n *\n * This API should be sparingly used. Try `accumulate` for something cleaner.\n *\n * @return {*|array<*>} An accumulation of items.\n */\n\nfunction accumulateInto(current, next) {\n !(next != null) ? invariant(false, 'accumulateInto(...): Accumulated items must not be null or undefined.') : void 0;\n\n if (current == null) {\n return next;\n }\n\n // Both are not empty. Warning: Never call x.concat(y) when you are not\n // certain that x is an Array (x could be a string with concat method).\n if (Array.isArray(current)) {\n if (Array.isArray(next)) {\n current.push.apply(current, next);\n return current;\n }\n current.push(next);\n return current;\n }\n\n if (Array.isArray(next)) {\n // A bit too dangerous to mutate `next`.\n return [current].concat(next);\n }\n\n return [current, next];\n}\n\n/**\n * @param {array} arr an \"accumulation\" of items which is either an Array or\n * a single item. Useful when paired with the `accumulate` module. This is a\n * simple utility that allows us to reason about a collection of items, but\n * handling the case when there is exactly one item (and we do not need to\n * allocate an array).\n * @param {function} cb Callback invoked with each element or a collection.\n * @param {?} [scope] Scope used as `this` in a callback.\n */\nfunction forEachAccumulated(arr, cb, scope) {\n if (Array.isArray(arr)) {\n arr.forEach(cb, scope);\n } else if (arr) {\n cb.call(scope, arr);\n }\n}\n\n/**\n * Internal queue of events that have accumulated their dispatches and are\n * waiting to have their dispatches executed.\n */\nvar eventQueue = null;\n\n/**\n * Dispatches an event and releases it back into the pool, unless persistent.\n *\n * @param {?object} event Synthetic event to be dispatched.\n * @private\n */\nvar executeDispatchesAndRelease = function (event) {\n if (event) {\n executeDispatchesInOrder(event);\n\n if (!event.isPersistent()) {\n event.constructor.release(event);\n }\n }\n};\nvar executeDispatchesAndReleaseTopLevel = function (e) {\n return executeDispatchesAndRelease(e);\n};\n\nfunction isInteractive(tag) {\n return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';\n}\n\nfunction shouldPreventMouseEvent(name, type, props) {\n switch (name) {\n case 'onClick':\n case 'onClickCapture':\n case 'onDoubleClick':\n case 'onDoubleClickCapture':\n case 'onMouseDown':\n case 'onMouseDownCapture':\n case 'onMouseMove':\n case 'onMouseMoveCapture':\n case 'onMouseUp':\n case 'onMouseUpCapture':\n return !!(props.disabled && isInteractive(type));\n default:\n return false;\n }\n}\n\n/**\n * This is a unified interface for event plugins to be installed and configured.\n *\n * Event plugins can implement the following properties:\n *\n * `extractEvents` {function(string, DOMEventTarget, string, object): *}\n * Required. When a top-level event is fired, this method is expected to\n * extract synthetic events that will in turn be queued and dispatched.\n *\n * `eventTypes` {object}\n * Optional, plugins that fire events must publish a mapping of registration\n * names that are used to register listeners. Values of this mapping must\n * be objects that contain `registrationName` or `phasedRegistrationNames`.\n *\n * `executeDispatch` {function(object, function, string)}\n * Optional, allows plugins to override how an event gets dispatched. By\n * default, the listener is simply invoked.\n *\n * Each plugin that is injected into `EventsPluginHub` is immediately operable.\n *\n * @public\n */\n\n/**\n * Methods for injecting dependencies.\n */\nvar injection = {\n /**\n * @param {array} InjectedEventPluginOrder\n * @public\n */\n injectEventPluginOrder: injectEventPluginOrder,\n\n /**\n * @param {object} injectedNamesToPlugins Map from names to plugin modules.\n */\n injectEventPluginsByName: injectEventPluginsByName\n};\n\n/**\n * @param {object} inst The instance, which is the source of events.\n * @param {string} registrationName Name of listener (e.g. `onClick`).\n * @return {?function} The stored callback.\n */\nfunction getListener(inst, registrationName) {\n var listener = void 0;\n\n // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not\n // live here; needs to be moved to a better place soon\n var stateNode = inst.stateNode;\n if (!stateNode) {\n // Work in progress (ex: onload events in incremental mode).\n return null;\n }\n var props = getFiberCurrentPropsFromNode(stateNode);\n if (!props) {\n // Work in progress.\n return null;\n }\n listener = props[registrationName];\n if (shouldPreventMouseEvent(registrationName, inst.type, props)) {\n return null;\n }\n !(!listener || typeof listener === 'function') ? invariant(false, 'Expected `%s` listener to be a function, instead got a value of `%s` type.', registrationName, typeof listener) : void 0;\n return listener;\n}\n\n/**\n * Allows registered plugins an opportunity to extract events from top-level\n * native browser events.\n *\n * @return {*} An accumulation of synthetic events.\n * @internal\n */\nfunction extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget) {\n var events = null;\n for (var i = 0; i < plugins.length; i++) {\n // Not every plugin in the ordering may be loaded at runtime.\n var possiblePlugin = plugins[i];\n if (possiblePlugin) {\n var extractedEvents = possiblePlugin.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);\n if (extractedEvents) {\n events = accumulateInto(events, extractedEvents);\n }\n }\n }\n return events;\n}\n\nfunction runEventsInBatch(events) {\n if (events !== null) {\n eventQueue = accumulateInto(eventQueue, events);\n }\n\n // Set `eventQueue` to null before processing it so that we can tell if more\n // events get enqueued while processing.\n var processingEventQueue = eventQueue;\n eventQueue = null;\n\n if (!processingEventQueue) {\n return;\n }\n\n forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseTopLevel);\n !!eventQueue ? invariant(false, 'processEventQueue(): Additional events were enqueued while processing an event queue. Support for this has not yet been implemented.') : void 0;\n // This would be a good time to rethrow if any of the event handlers threw.\n rethrowCaughtError();\n}\n\nfunction runExtractedEventsInBatch(topLevelType, targetInst, nativeEvent, nativeEventTarget) {\n var events = extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget);\n runEventsInBatch(events);\n}\n\nvar FunctionComponent = 0;\nvar ClassComponent = 1;\nvar IndeterminateComponent = 2; // Before we know whether it is function or class\nvar HostRoot = 3; // Root of a host tree. Could be nested inside another node.\nvar HostPortal = 4; // A subtree. Could be an entry point to a different renderer.\nvar HostComponent = 5;\nvar HostText = 6;\nvar Fragment = 7;\nvar Mode = 8;\nvar ContextConsumer = 9;\nvar ContextProvider = 10;\nvar ForwardRef = 11;\nvar Profiler = 12;\nvar SuspenseComponent = 13;\nvar MemoComponent = 14;\nvar SimpleMemoComponent = 15;\nvar LazyComponent = 16;\nvar IncompleteClassComponent = 17;\n\nvar randomKey = Math.random().toString(36).slice(2);\nvar internalInstanceKey = '__reactInternalInstance$' + randomKey;\nvar internalEventHandlersKey = '__reactEventHandlers$' + randomKey;\n\nfunction precacheFiberNode(hostInst, node) {\n node[internalInstanceKey] = hostInst;\n}\n\n/**\n * Given a DOM node, return the closest ReactDOMComponent or\n * ReactDOMTextComponent instance ancestor.\n */\nfunction getClosestInstanceFromNode(node) {\n if (node[internalInstanceKey]) {\n return node[internalInstanceKey];\n }\n\n while (!node[internalInstanceKey]) {\n if (node.parentNode) {\n node = node.parentNode;\n } else {\n // Top of the tree. This node must not be part of a React tree (or is\n // unmounted, potentially).\n return null;\n }\n }\n\n var inst = node[internalInstanceKey];\n if (inst.tag === HostComponent || inst.tag === HostText) {\n // In Fiber, this will always be the deepest root.\n return inst;\n }\n\n return null;\n}\n\n/**\n * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent\n * instance, or null if the node was not rendered by this React.\n */\nfunction getInstanceFromNode$1(node) {\n var inst = node[internalInstanceKey];\n if (inst) {\n if (inst.tag === HostComponent || inst.tag === HostText) {\n return inst;\n } else {\n return null;\n }\n }\n return null;\n}\n\n/**\n * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding\n * DOM node.\n */\nfunction getNodeFromInstance$1(inst) {\n if (inst.tag === HostComponent || inst.tag === HostText) {\n // In Fiber this, is just the state node right now. We assume it will be\n // a host component or host text.\n return inst.stateNode;\n }\n\n // Without this first invariant, passing a non-DOM-component triggers the next\n // invariant for a missing parent, which is super confusing.\n invariant(false, 'getNodeFromInstance: Invalid argument.');\n}\n\nfunction getFiberCurrentPropsFromNode$1(node) {\n return node[internalEventHandlersKey] || null;\n}\n\nfunction updateFiberProps(node, props) {\n node[internalEventHandlersKey] = props;\n}\n\nfunction getParent(inst) {\n do {\n inst = inst.return;\n // TODO: If this is a HostRoot we might want to bail out.\n // That is depending on if we want nested subtrees (layers) to bubble\n // events to their parent. We could also go through parentNode on the\n // host node but that wouldn't work for React Native and doesn't let us\n // do the portal feature.\n } while (inst && inst.tag !== HostComponent);\n if (inst) {\n return inst;\n }\n return null;\n}\n\n/**\n * Return the lowest common ancestor of A and B, or null if they are in\n * different trees.\n */\nfunction getLowestCommonAncestor(instA, instB) {\n var depthA = 0;\n for (var tempA = instA; tempA; tempA = getParent(tempA)) {\n depthA++;\n }\n var depthB = 0;\n for (var tempB = instB; tempB; tempB = getParent(tempB)) {\n depthB++;\n }\n\n // If A is deeper, crawl up.\n while (depthA - depthB > 0) {\n instA = getParent(instA);\n depthA--;\n }\n\n // If B is deeper, crawl up.\n while (depthB - depthA > 0) {\n instB = getParent(instB);\n depthB--;\n }\n\n // Walk in lockstep until we find a match.\n var depth = depthA;\n while (depth--) {\n if (instA === instB || instA === instB.alternate) {\n return instA;\n }\n instA = getParent(instA);\n instB = getParent(instB);\n }\n return null;\n}\n\n/**\n * Return if A is an ancestor of B.\n */\n\n\n/**\n * Return the parent instance of the passed-in instance.\n */\n\n\n/**\n * Simulates the traversal of a two-phase, capture/bubble event dispatch.\n */\nfunction traverseTwoPhase(inst, fn, arg) {\n var path = [];\n while (inst) {\n path.push(inst);\n inst = getParent(inst);\n }\n var i = void 0;\n for (i = path.length; i-- > 0;) {\n fn(path[i], 'captured', arg);\n }\n for (i = 0; i < path.length; i++) {\n fn(path[i], 'bubbled', arg);\n }\n}\n\n/**\n * Traverses the ID hierarchy and invokes the supplied `cb` on any IDs that\n * should would receive a `mouseEnter` or `mouseLeave` event.\n *\n * Does not invoke the callback on the nearest common ancestor because nothing\n * \"entered\" or \"left\" that element.\n */\nfunction traverseEnterLeave(from, to, fn, argFrom, argTo) {\n var common = from && to ? getLowestCommonAncestor(from, to) : null;\n var pathFrom = [];\n while (true) {\n if (!from) {\n break;\n }\n if (from === common) {\n break;\n }\n var alternate = from.alternate;\n if (alternate !== null && alternate === common) {\n break;\n }\n pathFrom.push(from);\n from = getParent(from);\n }\n var pathTo = [];\n while (true) {\n if (!to) {\n break;\n }\n if (to === common) {\n break;\n }\n var _alternate = to.alternate;\n if (_alternate !== null && _alternate === common) {\n break;\n }\n pathTo.push(to);\n to = getParent(to);\n }\n for (var i = 0; i < pathFrom.length; i++) {\n fn(pathFrom[i], 'bubbled', argFrom);\n }\n for (var _i = pathTo.length; _i-- > 0;) {\n fn(pathTo[_i], 'captured', argTo);\n }\n}\n\n/**\n * Some event types have a notion of different registration names for different\n * \"phases\" of propagation. This finds listeners by a given phase.\n */\nfunction listenerAtPhase(inst, event, propagationPhase) {\n var registrationName = event.dispatchConfig.phasedRegistrationNames[propagationPhase];\n return getListener(inst, registrationName);\n}\n\n/**\n * A small set of propagation patterns, each of which will accept a small amount\n * of information, and generate a set of \"dispatch ready event objects\" - which\n * are sets of events that have already been annotated with a set of dispatched\n * listener functions/ids. The API is designed this way to discourage these\n * propagation strategies from actually executing the dispatches, since we\n * always want to collect the entire set of dispatches before executing even a\n * single one.\n */\n\n/**\n * Tags a `SyntheticEvent` with dispatched listeners. Creating this function\n * here, allows us to not have to bind or create functions for each event.\n * Mutating the event's members allows us to not have to create a wrapping\n * \"dispatch\" object that pairs the event with the listener.\n */\nfunction accumulateDirectionalDispatches(inst, phase, event) {\n {\n !inst ? warningWithoutStack$1(false, 'Dispatching inst must not be null') : void 0;\n }\n var listener = listenerAtPhase(inst, event, phase);\n if (listener) {\n event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);\n event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);\n }\n}\n\n/**\n * Collect dispatches (must be entirely collected before dispatching - see unit\n * tests). Lazily allocate the array to conserve memory. We must loop through\n * each event and perform the traversal for each one. We cannot perform a\n * single traversal for the entire collection of events because each event may\n * have a different target.\n */\nfunction accumulateTwoPhaseDispatchesSingle(event) {\n if (event && event.dispatchConfig.phasedRegistrationNames) {\n traverseTwoPhase(event._targetInst, accumulateDirectionalDispatches, event);\n }\n}\n\n/**\n * Accumulates without regard to direction, does not look for phased\n * registration names. Same as `accumulateDirectDispatchesSingle` but without\n * requiring that the `dispatchMarker` be the same as the dispatched ID.\n */\nfunction accumulateDispatches(inst, ignoredDirection, event) {\n if (inst && event && event.dispatchConfig.registrationName) {\n var registrationName = event.dispatchConfig.registrationName;\n var listener = getListener(inst, registrationName);\n if (listener) {\n event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);\n event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);\n }\n }\n}\n\n/**\n * Accumulates dispatches on an `SyntheticEvent`, but only for the\n * `dispatchMarker`.\n * @param {SyntheticEvent} event\n */\nfunction accumulateDirectDispatchesSingle(event) {\n if (event && event.dispatchConfig.registrationName) {\n accumulateDispatches(event._targetInst, null, event);\n }\n}\n\nfunction accumulateTwoPhaseDispatches(events) {\n forEachAccumulated(events, accumulateTwoPhaseDispatchesSingle);\n}\n\n\n\nfunction accumulateEnterLeaveDispatches(leave, enter, from, to) {\n traverseEnterLeave(from, to, accumulateDispatches, leave, enter);\n}\n\nfunction accumulateDirectDispatches(events) {\n forEachAccumulated(events, accumulateDirectDispatchesSingle);\n}\n\nvar canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);\n\n// Do not uses the below two methods directly!\n// Instead use constants exported from DOMTopLevelEventTypes in ReactDOM.\n// (It is the only module that is allowed to access these methods.)\n\nfunction unsafeCastStringToDOMTopLevelType(topLevelType) {\n return topLevelType;\n}\n\nfunction unsafeCastDOMTopLevelTypeToString(topLevelType) {\n return topLevelType;\n}\n\n/**\n * Generate a mapping of standard vendor prefixes using the defined style property and event name.\n *\n * @param {string} styleProp\n * @param {string} eventName\n * @returns {object}\n */\nfunction makePrefixMap(styleProp, eventName) {\n var prefixes = {};\n\n prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();\n prefixes['Webkit' + styleProp] = 'webkit' + eventName;\n prefixes['Moz' + styleProp] = 'moz' + eventName;\n\n return prefixes;\n}\n\n/**\n * A list of event names to a configurable list of vendor prefixes.\n */\nvar vendorPrefixes = {\n animationend: makePrefixMap('Animation', 'AnimationEnd'),\n animationiteration: makePrefixMap('Animation', 'AnimationIteration'),\n animationstart: makePrefixMap('Animation', 'AnimationStart'),\n transitionend: makePrefixMap('Transition', 'TransitionEnd')\n};\n\n/**\n * Event names that have already been detected and prefixed (if applicable).\n */\nvar prefixedEventNames = {};\n\n/**\n * Element to check for prefixes on.\n */\nvar style = {};\n\n/**\n * Bootstrap if a DOM exists.\n */\nif (canUseDOM) {\n style = document.createElement('div').style;\n\n // On some platforms, in particular some releases of Android 4.x,\n // the un-prefixed \"animation\" and \"transition\" properties are defined on the\n // style object but the events that fire will still be prefixed, so we need\n // to check if the un-prefixed events are usable, and if not remove them from the map.\n if (!('AnimationEvent' in window)) {\n delete vendorPrefixes.animationend.animation;\n delete vendorPrefixes.animationiteration.animation;\n delete vendorPrefixes.animationstart.animation;\n }\n\n // Same as above\n if (!('TransitionEvent' in window)) {\n delete vendorPrefixes.transitionend.transition;\n }\n}\n\n/**\n * Attempts to determine the correct vendor prefixed event name.\n *\n * @param {string} eventName\n * @returns {string}\n */\nfunction getVendorPrefixedEventName(eventName) {\n if (prefixedEventNames[eventName]) {\n return prefixedEventNames[eventName];\n } else if (!vendorPrefixes[eventName]) {\n return eventName;\n }\n\n var prefixMap = vendorPrefixes[eventName];\n\n for (var styleProp in prefixMap) {\n if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) {\n return prefixedEventNames[eventName] = prefixMap[styleProp];\n }\n }\n\n return eventName;\n}\n\n/**\n * To identify top level events in ReactDOM, we use constants defined by this\n * module. This is the only module that uses the unsafe* methods to express\n * that the constants actually correspond to the browser event names. This lets\n * us save some bundle size by avoiding a top level type -> event name map.\n * The rest of ReactDOM code should import top level types from this file.\n */\nvar TOP_ABORT = unsafeCastStringToDOMTopLevelType('abort');\nvar TOP_ANIMATION_END = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationend'));\nvar TOP_ANIMATION_ITERATION = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationiteration'));\nvar TOP_ANIMATION_START = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationstart'));\nvar TOP_BLUR = unsafeCastStringToDOMTopLevelType('blur');\nvar TOP_CAN_PLAY = unsafeCastStringToDOMTopLevelType('canplay');\nvar TOP_CAN_PLAY_THROUGH = unsafeCastStringToDOMTopLevelType('canplaythrough');\nvar TOP_CANCEL = unsafeCastStringToDOMTopLevelType('cancel');\nvar TOP_CHANGE = unsafeCastStringToDOMTopLevelType('change');\nvar TOP_CLICK = unsafeCastStringToDOMTopLevelType('click');\nvar TOP_CLOSE = unsafeCastStringToDOMTopLevelType('close');\nvar TOP_COMPOSITION_END = unsafeCastStringToDOMTopLevelType('compositionend');\nvar TOP_COMPOSITION_START = unsafeCastStringToDOMTopLevelType('compositionstart');\nvar TOP_COMPOSITION_UPDATE = unsafeCastStringToDOMTopLevelType('compositionupdate');\nvar TOP_CONTEXT_MENU = unsafeCastStringToDOMTopLevelType('contextmenu');\nvar TOP_COPY = unsafeCastStringToDOMTopLevelType('copy');\nvar TOP_CUT = unsafeCastStringToDOMTopLevelType('cut');\nvar TOP_DOUBLE_CLICK = unsafeCastStringToDOMTopLevelType('dblclick');\nvar TOP_AUX_CLICK = unsafeCastStringToDOMTopLevelType('auxclick');\nvar TOP_DRAG = unsafeCastStringToDOMTopLevelType('drag');\nvar TOP_DRAG_END = unsafeCastStringToDOMTopLevelType('dragend');\nvar TOP_DRAG_ENTER = unsafeCastStringToDOMTopLevelType('dragenter');\nvar TOP_DRAG_EXIT = unsafeCastStringToDOMTopLevelType('dragexit');\nvar TOP_DRAG_LEAVE = unsafeCastStringToDOMTopLevelType('dragleave');\nvar TOP_DRAG_OVER = unsafeCastStringToDOMTopLevelType('dragover');\nvar TOP_DRAG_START = unsafeCastStringToDOMTopLevelType('dragstart');\nvar TOP_DROP = unsafeCastStringToDOMTopLevelType('drop');\nvar TOP_DURATION_CHANGE = unsafeCastStringToDOMTopLevelType('durationchange');\nvar TOP_EMPTIED = unsafeCastStringToDOMTopLevelType('emptied');\nvar TOP_ENCRYPTED = unsafeCastStringToDOMTopLevelType('encrypted');\nvar TOP_ENDED = unsafeCastStringToDOMTopLevelType('ended');\nvar TOP_ERROR = unsafeCastStringToDOMTopLevelType('error');\nvar TOP_FOCUS = unsafeCastStringToDOMTopLevelType('focus');\nvar TOP_GOT_POINTER_CAPTURE = unsafeCastStringToDOMTopLevelType('gotpointercapture');\nvar TOP_INPUT = unsafeCastStringToDOMTopLevelType('input');\nvar TOP_INVALID = unsafeCastStringToDOMTopLevelType('invalid');\nvar TOP_KEY_DOWN = unsafeCastStringToDOMTopLevelType('keydown');\nvar TOP_KEY_PRESS = unsafeCastStringToDOMTopLevelType('keypress');\nvar TOP_KEY_UP = unsafeCastStringToDOMTopLevelType('keyup');\nvar TOP_LOAD = unsafeCastStringToDOMTopLevelType('load');\nvar TOP_LOAD_START = unsafeCastStringToDOMTopLevelType('loadstart');\nvar TOP_LOADED_DATA = unsafeCastStringToDOMTopLevelType('loadeddata');\nvar TOP_LOADED_METADATA = unsafeCastStringToDOMTopLevelType('loadedmetadata');\nvar TOP_LOST_POINTER_CAPTURE = unsafeCastStringToDOMTopLevelType('lostpointercapture');\nvar TOP_MOUSE_DOWN = unsafeCastStringToDOMTopLevelType('mousedown');\nvar TOP_MOUSE_MOVE = unsafeCastStringToDOMTopLevelType('mousemove');\nvar TOP_MOUSE_OUT = unsafeCastStringToDOMTopLevelType('mouseout');\nvar TOP_MOUSE_OVER = unsafeCastStringToDOMTopLevelType('mouseover');\nvar TOP_MOUSE_UP = unsafeCastStringToDOMTopLevelType('mouseup');\nvar TOP_PASTE = unsafeCastStringToDOMTopLevelType('paste');\nvar TOP_PAUSE = unsafeCastStringToDOMTopLevelType('pause');\nvar TOP_PLAY = unsafeCastStringToDOMTopLevelType('play');\nvar TOP_PLAYING = unsafeCastStringToDOMTopLevelType('playing');\nvar TOP_POINTER_CANCEL = unsafeCastStringToDOMTopLevelType('pointercancel');\nvar TOP_POINTER_DOWN = unsafeCastStringToDOMTopLevelType('pointerdown');\n\n\nvar TOP_POINTER_MOVE = unsafeCastStringToDOMTopLevelType('pointermove');\nvar TOP_POINTER_OUT = unsafeCastStringToDOMTopLevelType('pointerout');\nvar TOP_POINTER_OVER = unsafeCastStringToDOMTopLevelType('pointerover');\nvar TOP_POINTER_UP = unsafeCastStringToDOMTopLevelType('pointerup');\nvar TOP_PROGRESS = unsafeCastStringToDOMTopLevelType('progress');\nvar TOP_RATE_CHANGE = unsafeCastStringToDOMTopLevelType('ratechange');\nvar TOP_RESET = unsafeCastStringToDOMTopLevelType('reset');\nvar TOP_SCROLL = unsafeCastStringToDOMTopLevelType('scroll');\nvar TOP_SEEKED = unsafeCastStringToDOMTopLevelType('seeked');\nvar TOP_SEEKING = unsafeCastStringToDOMTopLevelType('seeking');\nvar TOP_SELECTION_CHANGE = unsafeCastStringToDOMTopLevelType('selectionchange');\nvar TOP_STALLED = unsafeCastStringToDOMTopLevelType('stalled');\nvar TOP_SUBMIT = unsafeCastStringToDOMTopLevelType('submit');\nvar TOP_SUSPEND = unsafeCastStringToDOMTopLevelType('suspend');\nvar TOP_TEXT_INPUT = unsafeCastStringToDOMTopLevelType('textInput');\nvar TOP_TIME_UPDATE = unsafeCastStringToDOMTopLevelType('timeupdate');\nvar TOP_TOGGLE = unsafeCastStringToDOMTopLevelType('toggle');\nvar TOP_TOUCH_CANCEL = unsafeCastStringToDOMTopLevelType('touchcancel');\nvar TOP_TOUCH_END = unsafeCastStringToDOMTopLevelType('touchend');\nvar TOP_TOUCH_MOVE = unsafeCastStringToDOMTopLevelType('touchmove');\nvar TOP_TOUCH_START = unsafeCastStringToDOMTopLevelType('touchstart');\nvar TOP_TRANSITION_END = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('transitionend'));\nvar TOP_VOLUME_CHANGE = unsafeCastStringToDOMTopLevelType('volumechange');\nvar TOP_WAITING = unsafeCastStringToDOMTopLevelType('waiting');\nvar TOP_WHEEL = unsafeCastStringToDOMTopLevelType('wheel');\n\n// List of events that need to be individually attached to media elements.\n// Note that events in this list will *not* be listened to at the top level\n// unless they're explicitly whitelisted in `ReactBrowserEventEmitter.listenTo`.\nvar mediaEventTypes = [TOP_ABORT, TOP_CAN_PLAY, TOP_CAN_PLAY_THROUGH, TOP_DURATION_CHANGE, TOP_EMPTIED, TOP_ENCRYPTED, TOP_ENDED, TOP_ERROR, TOP_LOADED_DATA, TOP_LOADED_METADATA, TOP_LOAD_START, TOP_PAUSE, TOP_PLAY, TOP_PLAYING, TOP_PROGRESS, TOP_RATE_CHANGE, TOP_SEEKED, TOP_SEEKING, TOP_STALLED, TOP_SUSPEND, TOP_TIME_UPDATE, TOP_VOLUME_CHANGE, TOP_WAITING];\n\nfunction getRawEventName(topLevelType) {\n return unsafeCastDOMTopLevelTypeToString(topLevelType);\n}\n\n/**\n * These variables store information about text content of a target node,\n * allowing comparison of content before and after a given event.\n *\n * Identify the node where selection currently begins, then observe\n * both its text content and its current position in the DOM. Since the\n * browser may natively replace the target node during composition, we can\n * use its position to find its replacement.\n *\n *\n */\n\nvar root = null;\nvar startText = null;\nvar fallbackText = null;\n\nfunction initialize(nativeEventTarget) {\n root = nativeEventTarget;\n startText = getText();\n return true;\n}\n\nfunction reset() {\n root = null;\n startText = null;\n fallbackText = null;\n}\n\nfunction getData() {\n if (fallbackText) {\n return fallbackText;\n }\n\n var start = void 0;\n var startValue = startText;\n var startLength = startValue.length;\n var end = void 0;\n var endValue = getText();\n var endLength = endValue.length;\n\n for (start = 0; start < startLength; start++) {\n if (startValue[start] !== endValue[start]) {\n break;\n }\n }\n\n var minEnd = startLength - start;\n for (end = 1; end <= minEnd; end++) {\n if (startValue[startLength - end] !== endValue[endLength - end]) {\n break;\n }\n }\n\n var sliceTail = end > 1 ? 1 - end : undefined;\n fallbackText = endValue.slice(start, sliceTail);\n return fallbackText;\n}\n\nfunction getText() {\n if ('value' in root) {\n return root.value;\n }\n return root.textContent;\n}\n\n/* eslint valid-typeof: 0 */\n\nvar EVENT_POOL_SIZE = 10;\n\n/**\n * @interface Event\n * @see http://www.w3.org/TR/DOM-Level-3-Events/\n */\nvar EventInterface = {\n type: null,\n target: null,\n // currentTarget is set when dispatching; no use in copying it here\n currentTarget: function () {\n return null;\n },\n eventPhase: null,\n bubbles: null,\n cancelable: null,\n timeStamp: function (event) {\n return event.timeStamp || Date.now();\n },\n defaultPrevented: null,\n isTrusted: null\n};\n\nfunction functionThatReturnsTrue() {\n return true;\n}\n\nfunction functionThatReturnsFalse() {\n return false;\n}\n\n/**\n * Synthetic events are dispatched by event plugins, typically in response to a\n * top-level event delegation handler.\n *\n * These systems should generally use pooling to reduce the frequency of garbage\n * collection. The system should check `isPersistent` to determine whether the\n * event should be released into the pool after being dispatched. Users that\n * need a persisted event should invoke `persist`.\n *\n * Synthetic events (and subclasses) implement the DOM Level 3 Events API by\n * normalizing browser quirks. Subclasses do not necessarily have to implement a\n * DOM interface; custom application-specific events can also subclass this.\n *\n * @param {object} dispatchConfig Configuration used to dispatch this event.\n * @param {*} targetInst Marker identifying the event target.\n * @param {object} nativeEvent Native browser event.\n * @param {DOMEventTarget} nativeEventTarget Target node.\n */\nfunction SyntheticEvent(dispatchConfig, targetInst, nativeEvent, nativeEventTarget) {\n {\n // these have a getter/setter for warnings\n delete this.nativeEvent;\n delete this.preventDefault;\n delete this.stopPropagation;\n delete this.isDefaultPrevented;\n delete this.isPropagationStopped;\n }\n\n this.dispatchConfig = dispatchConfig;\n this._targetInst = targetInst;\n this.nativeEvent = nativeEvent;\n\n var Interface = this.constructor.Interface;\n for (var propName in Interface) {\n if (!Interface.hasOwnProperty(propName)) {\n continue;\n }\n {\n delete this[propName]; // this has a getter/setter for warnings\n }\n var normalize = Interface[propName];\n if (normalize) {\n this[propName] = normalize(nativeEvent);\n } else {\n if (propName === 'target') {\n this.target = nativeEventTarget;\n } else {\n this[propName] = nativeEvent[propName];\n }\n }\n }\n\n var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;\n if (defaultPrevented) {\n this.isDefaultPrevented = functionThatReturnsTrue;\n } else {\n this.isDefaultPrevented = functionThatReturnsFalse;\n }\n this.isPropagationStopped = functionThatReturnsFalse;\n return this;\n}\n\n_assign(SyntheticEvent.prototype, {\n preventDefault: function () {\n this.defaultPrevented = true;\n var event = this.nativeEvent;\n if (!event) {\n return;\n }\n\n if (event.preventDefault) {\n event.preventDefault();\n } else if (typeof event.returnValue !== 'unknown') {\n event.returnValue = false;\n }\n this.isDefaultPrevented = functionThatReturnsTrue;\n },\n\n stopPropagation: function () {\n var event = this.nativeEvent;\n if (!event) {\n return;\n }\n\n if (event.stopPropagation) {\n event.stopPropagation();\n } else if (typeof event.cancelBubble !== 'unknown') {\n // The ChangeEventPlugin registers a \"propertychange\" event for\n // IE. This event does not support bubbling or cancelling, and\n // any references to cancelBubble throw \"Member not found\". A\n // typeof check of \"unknown\" circumvents this issue (and is also\n // IE specific).\n event.cancelBubble = true;\n }\n\n this.isPropagationStopped = functionThatReturnsTrue;\n },\n\n /**\n * We release all dispatched `SyntheticEvent`s after each event loop, adding\n * them back into the pool. This allows a way to hold onto a reference that\n * won't be added back into the pool.\n */\n persist: function () {\n this.isPersistent = functionThatReturnsTrue;\n },\n\n /**\n * Checks if this event should be released back into the pool.\n *\n * @return {boolean} True if this should not be released, false otherwise.\n */\n isPersistent: functionThatReturnsFalse,\n\n /**\n * `PooledClass` looks for `destructor` on each instance it releases.\n */\n destructor: function () {\n var Interface = this.constructor.Interface;\n for (var propName in Interface) {\n {\n Object.defineProperty(this, propName, getPooledWarningPropertyDefinition(propName, Interface[propName]));\n }\n }\n this.dispatchConfig = null;\n this._targetInst = null;\n this.nativeEvent = null;\n this.isDefaultPrevented = functionThatReturnsFalse;\n this.isPropagationStopped = functionThatReturnsFalse;\n this._dispatchListeners = null;\n this._dispatchInstances = null;\n {\n Object.defineProperty(this, 'nativeEvent', getPooledWarningPropertyDefinition('nativeEvent', null));\n Object.defineProperty(this, 'isDefaultPrevented', getPooledWarningPropertyDefinition('isDefaultPrevented', functionThatReturnsFalse));\n Object.defineProperty(this, 'isPropagationStopped', getPooledWarningPropertyDefinition('isPropagationStopped', functionThatReturnsFalse));\n Object.defineProperty(this, 'preventDefault', getPooledWarningPropertyDefinition('preventDefault', function () {}));\n Object.defineProperty(this, 'stopPropagation', getPooledWarningPropertyDefinition('stopPropagation', function () {}));\n }\n }\n});\n\nSyntheticEvent.Interface = EventInterface;\n\n/**\n * Helper to reduce boilerplate when creating subclasses.\n */\nSyntheticEvent.extend = function (Interface) {\n var Super = this;\n\n var E = function () {};\n E.prototype = Super.prototype;\n var prototype = new E();\n\n function Class() {\n return Super.apply(this, arguments);\n }\n _assign(prototype, Class.prototype);\n Class.prototype = prototype;\n Class.prototype.constructor = Class;\n\n Class.Interface = _assign({}, Super.Interface, Interface);\n Class.extend = Super.extend;\n addEventPoolingTo(Class);\n\n return Class;\n};\n\naddEventPoolingTo(SyntheticEvent);\n\n/**\n * Helper to nullify syntheticEvent instance properties when destructing\n *\n * @param {String} propName\n * @param {?object} getVal\n * @return {object} defineProperty object\n */\nfunction getPooledWarningPropertyDefinition(propName, getVal) {\n var isFunction = typeof getVal === 'function';\n return {\n configurable: true,\n set: set,\n get: get\n };\n\n function set(val) {\n var action = isFunction ? 'setting the method' : 'setting the property';\n warn(action, 'This is effectively a no-op');\n return val;\n }\n\n function get() {\n var action = isFunction ? 'accessing the method' : 'accessing the property';\n var result = isFunction ? 'This is a no-op function' : 'This is set to null';\n warn(action, result);\n return getVal;\n }\n\n function warn(action, result) {\n var warningCondition = false;\n !warningCondition ? warningWithoutStack$1(false, \"This synthetic event is reused for performance reasons. If you're seeing this, \" + \"you're %s `%s` on a released/nullified synthetic event. %s. \" + 'If you must keep the original synthetic event around, use event.persist(). ' + 'See https://fb.me/react-event-pooling for more information.', action, propName, result) : void 0;\n }\n}\n\nfunction getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {\n var EventConstructor = this;\n if (EventConstructor.eventPool.length) {\n var instance = EventConstructor.eventPool.pop();\n EventConstructor.call(instance, dispatchConfig, targetInst, nativeEvent, nativeInst);\n return instance;\n }\n return new EventConstructor(dispatchConfig, targetInst, nativeEvent, nativeInst);\n}\n\nfunction releasePooledEvent(event) {\n var EventConstructor = this;\n !(event instanceof EventConstructor) ? invariant(false, 'Trying to release an event instance into a pool of a different type.') : void 0;\n event.destructor();\n if (EventConstructor.eventPool.length < EVENT_POOL_SIZE) {\n EventConstructor.eventPool.push(event);\n }\n}\n\nfunction addEventPoolingTo(EventConstructor) {\n EventConstructor.eventPool = [];\n EventConstructor.getPooled = getPooledEvent;\n EventConstructor.release = releasePooledEvent;\n}\n\n/**\n * @interface Event\n * @see http://www.w3.org/TR/DOM-Level-3-Events/#events-compositionevents\n */\nvar SyntheticCompositionEvent = SyntheticEvent.extend({\n data: null\n});\n\n/**\n * @interface Event\n * @see http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105\n * /#events-inputevents\n */\nvar SyntheticInputEvent = SyntheticEvent.extend({\n data: null\n});\n\nvar END_KEYCODES = [9, 13, 27, 32]; // Tab, Return, Esc, Space\nvar START_KEYCODE = 229;\n\nvar canUseCompositionEvent = canUseDOM && 'CompositionEvent' in window;\n\nvar documentMode = null;\nif (canUseDOM && 'documentMode' in document) {\n documentMode = document.documentMode;\n}\n\n// Webkit offers a very useful `textInput` event that can be used to\n// directly represent `beforeInput`. The IE `textinput` event is not as\n// useful, so we don't use it.\nvar canUseTextInputEvent = canUseDOM && 'TextEvent' in window && !documentMode;\n\n// In IE9+, we have access to composition events, but the data supplied\n// by the native compositionend event may be incorrect. Japanese ideographic\n// spaces, for instance (\\u3000) are not recorded correctly.\nvar useFallbackCompositionData = canUseDOM && (!canUseCompositionEvent || documentMode && documentMode > 8 && documentMode <= 11);\n\nvar SPACEBAR_CODE = 32;\nvar SPACEBAR_CHAR = String.fromCharCode(SPACEBAR_CODE);\n\n// Events and their corresponding property names.\nvar eventTypes = {\n beforeInput: {\n phasedRegistrationNames: {\n bubbled: 'onBeforeInput',\n captured: 'onBeforeInputCapture'\n },\n dependencies: [TOP_COMPOSITION_END, TOP_KEY_PRESS, TOP_TEXT_INPUT, TOP_PASTE]\n },\n compositionEnd: {\n phasedRegistrationNames: {\n bubbled: 'onCompositionEnd',\n captured: 'onCompositionEndCapture'\n },\n dependencies: [TOP_BLUR, TOP_COMPOSITION_END, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]\n },\n compositionStart: {\n phasedRegistrationNames: {\n bubbled: 'onCompositionStart',\n captured: 'onCompositionStartCapture'\n },\n dependencies: [TOP_BLUR, TOP_COMPOSITION_START, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]\n },\n compositionUpdate: {\n phasedRegistrationNames: {\n bubbled: 'onCompositionUpdate',\n captured: 'onCompositionUpdateCapture'\n },\n dependencies: [TOP_BLUR, TOP_COMPOSITION_UPDATE, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]\n }\n};\n\n// Track whether we've ever handled a keypress on the space key.\nvar hasSpaceKeypress = false;\n\n/**\n * Return whether a native keypress event is assumed to be a command.\n * This is required because Firefox fires `keypress` events for key commands\n * (cut, copy, select-all, etc.) even though no character is inserted.\n */\nfunction isKeypressCommand(nativeEvent) {\n return (nativeEvent.ctrlKey || nativeEvent.altKey || nativeEvent.metaKey) &&\n // ctrlKey && altKey is equivalent to AltGr, and is not a command.\n !(nativeEvent.ctrlKey && nativeEvent.altKey);\n}\n\n/**\n * Translate native top level events into event types.\n *\n * @param {string} topLevelType\n * @return {object}\n */\nfunction getCompositionEventType(topLevelType) {\n switch (topLevelType) {\n case TOP_COMPOSITION_START:\n return eventTypes.compositionStart;\n case TOP_COMPOSITION_END:\n return eventTypes.compositionEnd;\n case TOP_COMPOSITION_UPDATE:\n return eventTypes.compositionUpdate;\n }\n}\n\n/**\n * Does our fallback best-guess model think this event signifies that\n * composition has begun?\n *\n * @param {string} topLevelType\n * @param {object} nativeEvent\n * @return {boolean}\n */\nfunction isFallbackCompositionStart(topLevelType, nativeEvent) {\n return topLevelType === TOP_KEY_DOWN && nativeEvent.keyCode === START_KEYCODE;\n}\n\n/**\n * Does our fallback mode think that this event is the end of composition?\n *\n * @param {string} topLevelType\n * @param {object} nativeEvent\n * @return {boolean}\n */\nfunction isFallbackCompositionEnd(topLevelType, nativeEvent) {\n switch (topLevelType) {\n case TOP_KEY_UP:\n // Command keys insert or clear IME input.\n return END_KEYCODES.indexOf(nativeEvent.keyCode) !== -1;\n case TOP_KEY_DOWN:\n // Expect IME keyCode on each keydown. If we get any other\n // code we must have exited earlier.\n return nativeEvent.keyCode !== START_KEYCODE;\n case TOP_KEY_PRESS:\n case TOP_MOUSE_DOWN:\n case TOP_BLUR:\n // Events are not possible without cancelling IME.\n return true;\n default:\n return false;\n }\n}\n\n/**\n * Google Input Tools provides composition data via a CustomEvent,\n * with the `data` property populated in the `detail` object. If this\n * is available on the event object, use it. If not, this is a plain\n * composition event and we have nothing special to extract.\n *\n * @param {object} nativeEvent\n * @return {?string}\n */\nfunction getDataFromCustomEvent(nativeEvent) {\n var detail = nativeEvent.detail;\n if (typeof detail === 'object' && 'data' in detail) {\n return detail.data;\n }\n return null;\n}\n\n/**\n * Check if a composition event was triggered by Korean IME.\n * Our fallback mode does not work well with IE's Korean IME,\n * so just use native composition events when Korean IME is used.\n * Although CompositionEvent.locale property is deprecated,\n * it is available in IE, where our fallback mode is enabled.\n *\n * @param {object} nativeEvent\n * @return {boolean}\n */\nfunction isUsingKoreanIME(nativeEvent) {\n return nativeEvent.locale === 'ko';\n}\n\n// Track the current IME composition status, if any.\nvar isComposing = false;\n\n/**\n * @return {?object} A SyntheticCompositionEvent.\n */\nfunction extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {\n var eventType = void 0;\n var fallbackData = void 0;\n\n if (canUseCompositionEvent) {\n eventType = getCompositionEventType(topLevelType);\n } else if (!isComposing) {\n if (isFallbackCompositionStart(topLevelType, nativeEvent)) {\n eventType = eventTypes.compositionStart;\n }\n } else if (isFallbackCompositionEnd(topLevelType, nativeEvent)) {\n eventType = eventTypes.compositionEnd;\n }\n\n if (!eventType) {\n return null;\n }\n\n if (useFallbackCompositionData && !isUsingKoreanIME(nativeEvent)) {\n // The current composition is stored statically and must not be\n // overwritten while composition continues.\n if (!isComposing && eventType === eventTypes.compositionStart) {\n isComposing = initialize(nativeEventTarget);\n } else if (eventType === eventTypes.compositionEnd) {\n if (isComposing) {\n fallbackData = getData();\n }\n }\n }\n\n var event = SyntheticCompositionEvent.getPooled(eventType, targetInst, nativeEvent, nativeEventTarget);\n\n if (fallbackData) {\n // Inject data generated from fallback path into the synthetic event.\n // This matches the property of native CompositionEventInterface.\n event.data = fallbackData;\n } else {\n var customData = getDataFromCustomEvent(nativeEvent);\n if (customData !== null) {\n event.data = customData;\n }\n }\n\n accumulateTwoPhaseDispatches(event);\n return event;\n}\n\n/**\n * @param {TopLevelType} topLevelType Number from `TopLevelType`.\n * @param {object} nativeEvent Native browser event.\n * @return {?string} The string corresponding to this `beforeInput` event.\n */\nfunction getNativeBeforeInputChars(topLevelType, nativeEvent) {\n switch (topLevelType) {\n case TOP_COMPOSITION_END:\n return getDataFromCustomEvent(nativeEvent);\n case TOP_KEY_PRESS:\n /**\n * If native `textInput` events are available, our goal is to make\n * use of them. However, there is a special case: the spacebar key.\n * In Webkit, preventing default on a spacebar `textInput` event\n * cancels character insertion, but it *also* causes the browser\n * to fall back to its default spacebar behavior of scrolling the\n * page.\n *\n * Tracking at:\n * https://code.google.com/p/chromium/issues/detail?id=355103\n *\n * To avoid this issue, use the keypress event as if no `textInput`\n * event is available.\n */\n var which = nativeEvent.which;\n if (which !== SPACEBAR_CODE) {\n return null;\n }\n\n hasSpaceKeypress = true;\n return SPACEBAR_CHAR;\n\n case TOP_TEXT_INPUT:\n // Record the characters to be added to the DOM.\n var chars = nativeEvent.data;\n\n // If it's a spacebar character, assume that we have already handled\n // it at the keypress level and bail immediately. Android Chrome\n // doesn't give us keycodes, so we need to ignore it.\n if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {\n return null;\n }\n\n return chars;\n\n default:\n // For other native event types, do nothing.\n return null;\n }\n}\n\n/**\n * For browsers that do not provide the `textInput` event, extract the\n * appropriate string to use for SyntheticInputEvent.\n *\n * @param {number} topLevelType Number from `TopLevelEventTypes`.\n * @param {object} nativeEvent Native browser event.\n * @return {?string} The fallback string for this `beforeInput` event.\n */\nfunction getFallbackBeforeInputChars(topLevelType, nativeEvent) {\n // If we are currently composing (IME) and using a fallback to do so,\n // try to extract the composed characters from the fallback object.\n // If composition event is available, we extract a string only at\n // compositionevent, otherwise extract it at fallback events.\n if (isComposing) {\n if (topLevelType === TOP_COMPOSITION_END || !canUseCompositionEvent && isFallbackCompositionEnd(topLevelType, nativeEvent)) {\n var chars = getData();\n reset();\n isComposing = false;\n return chars;\n }\n return null;\n }\n\n switch (topLevelType) {\n case TOP_PASTE:\n // If a paste event occurs after a keypress, throw out the input\n // chars. Paste events should not lead to BeforeInput events.\n return null;\n case TOP_KEY_PRESS:\n /**\n * As of v27, Firefox may fire keypress events even when no character\n * will be inserted. A few possibilities:\n *\n * - `which` is `0`. Arrow keys, Esc key, etc.\n *\n * - `which` is the pressed key code, but no char is available.\n * Ex: 'AltGr + d` in Polish. There is no modified character for\n * this key combination and no character is inserted into the\n * document, but FF fires the keypress for char code `100` anyway.\n * No `input` event will occur.\n *\n * - `which` is the pressed key code, but a command combination is\n * being used. Ex: `Cmd+C`. No character is inserted, and no\n * `input` event will occur.\n */\n if (!isKeypressCommand(nativeEvent)) {\n // IE fires the `keypress` event when a user types an emoji via\n // Touch keyboard of Windows. In such a case, the `char` property\n // holds an emoji character like `\\uD83D\\uDE0A`. Because its length\n // is 2, the property `which` does not represent an emoji correctly.\n // In such a case, we directly return the `char` property instead of\n // using `which`.\n if (nativeEvent.char && nativeEvent.char.length > 1) {\n return nativeEvent.char;\n } else if (nativeEvent.which) {\n return String.fromCharCode(nativeEvent.which);\n }\n }\n return null;\n case TOP_COMPOSITION_END:\n return useFallbackCompositionData && !isUsingKoreanIME(nativeEvent) ? null : nativeEvent.data;\n default:\n return null;\n }\n}\n\n/**\n * Extract a SyntheticInputEvent for `beforeInput`, based on either native\n * `textInput` or fallback behavior.\n *\n * @return {?object} A SyntheticInputEvent.\n */\nfunction extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {\n var chars = void 0;\n\n if (canUseTextInputEvent) {\n chars = getNativeBeforeInputChars(topLevelType, nativeEvent);\n } else {\n chars = getFallbackBeforeInputChars(topLevelType, nativeEvent);\n }\n\n // If no characters are being inserted, no BeforeInput event should\n // be fired.\n if (!chars) {\n return null;\n }\n\n var event = SyntheticInputEvent.getPooled(eventTypes.beforeInput, targetInst, nativeEvent, nativeEventTarget);\n\n event.data = chars;\n accumulateTwoPhaseDispatches(event);\n return event;\n}\n\n/**\n * Create an `onBeforeInput` event to match\n * http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105/#events-inputevents.\n *\n * This event plugin is based on the native `textInput` event\n * available in Chrome, Safari, Opera, and IE. This event fires after\n * `onKeyPress` and `onCompositionEnd`, but before `onInput`.\n *\n * `beforeInput` is spec'd but not implemented in any browsers, and\n * the `input` event does not provide any useful information about what has\n * actually been added, contrary to the spec. Thus, `textInput` is the best\n * available event to identify the characters that have actually been inserted\n * into the target node.\n *\n * This plugin is also responsible for emitting `composition` events, thus\n * allowing us to share composition fallback code for both `beforeInput` and\n * `composition` event types.\n */\nvar BeforeInputEventPlugin = {\n eventTypes: eventTypes,\n\n extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget) {\n var composition = extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget);\n\n var beforeInput = extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget);\n\n if (composition === null) {\n return beforeInput;\n }\n\n if (beforeInput === null) {\n return composition;\n }\n\n return [composition, beforeInput];\n }\n};\n\n// Use to restore controlled state after a change event has fired.\n\nvar restoreImpl = null;\nvar restoreTarget = null;\nvar restoreQueue = null;\n\nfunction restoreStateOfTarget(target) {\n // We perform this translation at the end of the event loop so that we\n // always receive the correct fiber here\n var internalInstance = getInstanceFromNode(target);\n if (!internalInstance) {\n // Unmounted\n return;\n }\n !(typeof restoreImpl === 'function') ? invariant(false, 'setRestoreImplementation() needs to be called to handle a target for controlled events. This error is likely caused by a bug in React. Please file an issue.') : void 0;\n var props = getFiberCurrentPropsFromNode(internalInstance.stateNode);\n restoreImpl(internalInstance.stateNode, internalInstance.type, props);\n}\n\nfunction setRestoreImplementation(impl) {\n restoreImpl = impl;\n}\n\nfunction enqueueStateRestore(target) {\n if (restoreTarget) {\n if (restoreQueue) {\n restoreQueue.push(target);\n } else {\n restoreQueue = [target];\n }\n } else {\n restoreTarget = target;\n }\n}\n\nfunction needsStateRestore() {\n return restoreTarget !== null || restoreQueue !== null;\n}\n\nfunction restoreStateIfNeeded() {\n if (!restoreTarget) {\n return;\n }\n var target = restoreTarget;\n var queuedTargets = restoreQueue;\n restoreTarget = null;\n restoreQueue = null;\n\n restoreStateOfTarget(target);\n if (queuedTargets) {\n for (var i = 0; i < queuedTargets.length; i++) {\n restoreStateOfTarget(queuedTargets[i]);\n }\n }\n}\n\n// Used as a way to call batchedUpdates when we don't have a reference to\n// the renderer. Such as when we're dispatching events or if third party\n// libraries need to call batchedUpdates. Eventually, this API will go away when\n// everything is batched by default. We'll then have a similar API to opt-out of\n// scheduled work and instead do synchronous work.\n\n// Defaults\nvar _batchedUpdatesImpl = function (fn, bookkeeping) {\n return fn(bookkeeping);\n};\nvar _interactiveUpdatesImpl = function (fn, a, b) {\n return fn(a, b);\n};\nvar _flushInteractiveUpdatesImpl = function () {};\n\nvar isBatching = false;\nfunction batchedUpdates(fn, bookkeeping) {\n if (isBatching) {\n // If we are currently inside another batch, we need to wait until it\n // fully completes before restoring state.\n return fn(bookkeeping);\n }\n isBatching = true;\n try {\n return _batchedUpdatesImpl(fn, bookkeeping);\n } finally {\n // Here we wait until all updates have propagated, which is important\n // when using controlled components within layers:\n // https://github.com/facebook/react/issues/1698\n // Then we restore state of any controlled component.\n isBatching = false;\n var controlledComponentsHavePendingUpdates = needsStateRestore();\n if (controlledComponentsHavePendingUpdates) {\n // If a controlled event was fired, we may need to restore the state of\n // the DOM node back to the controlled value. This is necessary when React\n // bails out of the update without touching the DOM.\n _flushInteractiveUpdatesImpl();\n restoreStateIfNeeded();\n }\n }\n}\n\nfunction interactiveUpdates(fn, a, b) {\n return _interactiveUpdatesImpl(fn, a, b);\n}\n\n\n\nfunction setBatchingImplementation(batchedUpdatesImpl, interactiveUpdatesImpl, flushInteractiveUpdatesImpl) {\n _batchedUpdatesImpl = batchedUpdatesImpl;\n _interactiveUpdatesImpl = interactiveUpdatesImpl;\n _flushInteractiveUpdatesImpl = flushInteractiveUpdatesImpl;\n}\n\n/**\n * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary\n */\nvar supportedInputTypes = {\n color: true,\n date: true,\n datetime: true,\n 'datetime-local': true,\n email: true,\n month: true,\n number: true,\n password: true,\n range: true,\n search: true,\n tel: true,\n text: true,\n time: true,\n url: true,\n week: true\n};\n\nfunction isTextInputElement(elem) {\n var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();\n\n if (nodeName === 'input') {\n return !!supportedInputTypes[elem.type];\n }\n\n if (nodeName === 'textarea') {\n return true;\n }\n\n return false;\n}\n\n/**\n * HTML nodeType values that represent the type of the node\n */\n\nvar ELEMENT_NODE = 1;\nvar TEXT_NODE = 3;\nvar COMMENT_NODE = 8;\nvar DOCUMENT_NODE = 9;\nvar DOCUMENT_FRAGMENT_NODE = 11;\n\n/**\n * Gets the target node from a native browser event by accounting for\n * inconsistencies in browser DOM APIs.\n *\n * @param {object} nativeEvent Native browser event.\n * @return {DOMEventTarget} Target node.\n */\nfunction getEventTarget(nativeEvent) {\n // Fallback to nativeEvent.srcElement for IE9\n // https://github.com/facebook/react/issues/12506\n var target = nativeEvent.target || nativeEvent.srcElement || window;\n\n // Normalize SVG