/** @license React v16.8.6 * react.development.js * * Copyright (c) Facebook, Inc. and its affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree.
*/
// TODO: this is special because it gets imported during build.
var ReactVersion = '16.8.6';
// The Symbol used to tag the ReactElement-like types. If there is no native Symbol // nor polyfill, then a plain number is used for performance. var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7; var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca; var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb; var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc; var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2; var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd; var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace;
var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf; var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0; var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1; var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3; var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
var MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator; var FAUX_ITERATOR_SYMBOL = '@@iterator';
function getIteratorFn(maybeIterable) { if (maybeIterable === null || typeof maybeIterable !== 'object') { returnnull;
} var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL]; if (typeof maybeIterator === 'function') { return maybeIterator;
} returnnull;
}
/* object-assign (c) Sindre Sorhus @license MIT
*/
/* eslint-disable no-unused-vars */ var getOwnPropertySymbols = Object.getOwnPropertySymbols; var hasOwnProperty = Object.prototype.hasOwnProperty; var propIsEnumerable = Object.prototype.propertyIsEnumerable;
function toObject(val) { if (val === null || val === undefined) { thrownew TypeError('Object.assign cannot be called with null or undefined');
}
return Object(val);
}
function shouldUseNative() { try { if (!Object.assign) { returnfalse;
}
// Detect buggy property enumeration order in older V8 versions.
// https://bugs.chromium.org/p/v8/issues/detail?id=4118 var test1 = new String('abc'); // eslint-disable-line no-new-wrappers
test1[5] = 'de'; if (Object.getOwnPropertyNames(test1)[0] === '5') { returnfalse;
}
// https://bugs.chromium.org/p/v8/issues/detail?id=3056 var test2 = {}; for (var i = 0; i < 10; i++) {
test2['_' + String.fromCharCode(i)] = i;
} var order2 = Object.getOwnPropertyNames(test2).map(function (n) { return test2[n];
}); if (order2.join('') !== '0123456789') { returnfalse;
}
returntrue;
} catch (err) { // We don't expect any of the above to throw, but better to be safe. returnfalse;
}
}
var objectAssign = shouldUseNative() ? Object.assign : function (target, source) { var from; var to = toObject(target); var symbols;
for (var s = 1; s < arguments.length; s++) {
from = Object(arguments[s]);
for (var key in from) { if (hasOwnProperty.call(from, key)) {
to[key] = from[key];
}
}
if (getOwnPropertySymbols) {
symbols = getOwnPropertySymbols(from); for (var i = 0; i < symbols.length; i++) { if (propIsEnumerable.call(from, symbols[i])) {
to[symbols[i]] = from[symbols[i]];
}
}
}
}
return to;
};
/** * 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) { thrownew 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.
/** * Forked from fbjs/warning: * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js * * Only change is we use console.warn instead of console.error, * and do nothing when 'console' is not supported. * This really simplifies the code. * --- * Similar to invariant but only logs a warning if the condition is not met. * This can be used to log issues in development environments in critical * paths. Removing the logging code for production environments will keep the * same logic and follow the same code paths.
*/
var argIndex = 0; var message = 'Warning: ' + format.replace(/%s/g, function () { return args[argIndex++];
}); if (typeof console !== 'undefined') {
console.warn(message);
} try { // --- Welcome to debugging React --- // This error was thrown as a convenience so that you can use this stack // to find the callsite that caused this warning to fire. thrownew Error(message);
} catch (x) {}
};
lowPriorityWarning = function (condition, format) { if (format === undefined) { thrownew Error('`lowPriorityWarning(condition, format, ...args)` requires a warning ' + 'message argument');
} if (!condition) { for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
args[_key2 - 2] = arguments[_key2];
}
/** * 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.
*/
if (format === undefined) { thrownew Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
} if (args.length > 8) { // Check before the condition to catch violations early. thrownew Error('warningWithoutStack() currently supports at most 8 arguments.');
} if (condition) { return;
} if (typeof console !== 'undefined') { var argsWithFormat = args.map(function (item) { return'' + item;
});
argsWithFormat.unshift('Warning: ' + format);
// We intentionally don't use spread (or .apply) directly because it // breaks IE9: https://github.com/facebook/react/issues/13610 Function.prototype.apply.call(console.error, console, argsWithFormat);
} try { // --- Welcome to debugging React --- // This error was thrown as a convenience so that you can use this stack // to find the callsite that caused this warning to fire. var argIndex = 0; var message = 'Warning: ' + format.replace(/%s/g, function () { return args[argIndex++];
}); thrownew Error(message);
} catch (x) {}
};
}
var warningWithoutStack$1 = warningWithoutStack;
var didWarnStateUpdateForUnmountedComponent = {};
function warnNoop(publicInstance, callerName) {
{ var _constructor = publicInstance.constructor; var componentName = _constructor && (_constructor.displayName || _constructor.name) || 'ReactClass'; var warningKey = componentName + '.' + callerName; if (didWarnStateUpdateForUnmountedComponent[warningKey]) { return;
}
warningWithoutStack$1(false, "Can't call %s on a component that is not yet mounted. " + 'This is a no-op, but it might indicate a bug in your application. ' + 'Instead, assign to `this.state` directly or define a `state = {};` ' + 'class property with the desired state in the %s component.', callerName, componentName);
didWarnStateUpdateForUnmountedComponent[warningKey] = true;
}
}
/** * This is the abstract API for an update queue.
*/ var ReactNoopUpdateQueue = { /** * Checks whether or not this composite component is mounted. * @param {ReactClass} publicInstance The instance we want to test. * @return {boolean} True if mounted, false otherwise. * @protected * @final
*/
isMounted: function (publicInstance) { returnfalse;
},
/** * Forces an update. This should only be invoked when it is known with * certainty that we are **not** in a DOM transaction. * * You may want to call this when you know that some deeper aspect of the * component's state has changed but `setState` was not called. * * This will not invoke `shouldComponentUpdate`, but it will invoke * `componentWillUpdate` and `componentDidUpdate`. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {?function} callback Called after component is updated. * @param {?string} callerName name of the calling function in the public API. * @internal
*/
enqueueForceUpdate: function (publicInstance, callback, callerName) {
warnNoop(publicInstance, 'forceUpdate');
},
/** * Replaces all of the state. Always use this or `setState` to mutate state. * You should treat `this.state` as immutable. * * There is no guarantee that `this.state` will be immediately updated, so * accessing `this.state` after calling this method may return the old value. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {object} completeState Next state. * @param {?function} callback Called after component is updated. * @param {?string} callerName name of the calling function in the public API. * @internal
*/
enqueueReplaceState: function (publicInstance, completeState, callback, callerName) {
warnNoop(publicInstance, 'replaceState');
},
/** * Sets a subset of the state. This only exists because _pendingState is * internal. This provides a merging strategy that is not available to deep * properties which is confusing. TODO: Expose pendingState or don't use it * during the merge. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {object} partialState Next partial state to be merged with state. * @param {?function} callback Called after component is updated. * @param {?string} Name of the calling function in the public API. * @internal
*/
enqueueSetState: function (publicInstance, partialState, callback, callerName) {
warnNoop(publicInstance, 'setState');
}
};
var emptyObject = {};
{
Object.freeze(emptyObject);
}
/** * Base class helpers for the updating state of a component.
*/ function Component(props, context, updater) { this.props = props; this.context = context; // If a component has string refs, we will assign a different object later. this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the // renderer. this.updater = updater || ReactNoopUpdateQueue;
}
Component.prototype.isReactComponent = {};
/** * Sets a subset of the state. Always use this to mutate * state. You should treat `this.state` as immutable. * * There is no guarantee that `this.state` will be immediately updated, so * accessing `this.state` after calling this method may return the old value. * * There is no guarantee that calls to `setState` will run synchronously, * as they may eventually be batched together. You can provide an optional * callback that will be executed when the call to setState is actually * completed. * * When a function is provided to setState, it will be called at some point in * the future (not synchronously). It will be called with the up to date * component arguments (state, props, context). These values can be different * from this.* because your function may be called after receiveProps but before * shouldComponentUpdate, and this new state, props, and context will not yet be * assigned to this. * * @param {object|function} partialState Next partial state or function to * produce next partial state to be merged with current state. * @param {?function} callback Called after state is updated. * @final * @protected
*/
Component.prototype.setState = function (partialState, callback) {
!(typeof partialState === 'object' || typeof partialState === 'function' || partialState == null) ? invariant(false, 'setState(...): takes an object of state variables to update or a function which returns an object of state variables.') : void 0; this.updater.enqueueSetState(this, partialState, callback, 'setState');
};
/** * Forces an update. This should only be invoked when it is known with * certainty that we are **not** in a DOM transaction. * * You may want to call this when you know that some deeper aspect of the * component's state has changed but `setState` was not called. * * This will not invoke `shouldComponentUpdate`, but it will invoke * `componentWillUpdate` and `componentDidUpdate`. * * @param {?function} callback Called after update is complete. * @final * @protected
*/
Component.prototype.forceUpdate = function (callback) { this.updater.enqueueForceUpdate(this, callback, 'forceUpdate');
};
/** * Deprecated APIs. These APIs used to exist on classic React classes but since * we would like to deprecate them, we're not going to move them over to this * modern base class. Instead, we define a getter that warns if it's accessed.
*/
{ var deprecatedAPIs = {
isMounted: ['isMounted', 'Instead, make sure to clean up subscriptions and pending requests in ' + 'componentWillUnmount to prevent memory leaks.'],
replaceState: ['replaceState', 'Refactor your code to use setState instead (see ' + 'https://github.com/facebook/react/issues/3236).']
}; var defineDeprecationWarning = function (methodName, info) {
Object.defineProperty(Component.prototype, methodName, {
get: function () {
lowPriorityWarning$1(false, '%s(...) is deprecated in plain JavaScript React classes. %s', info[0], info[1]); return undefined;
}
});
}; for (var fnName in deprecatedAPIs) { if (deprecatedAPIs.hasOwnProperty(fnName)) {
defineDeprecationWarning(fnName, deprecatedAPIs[fnName]);
}
}
}
function ComponentDummy() {}
ComponentDummy.prototype = Component.prototype;
/** * Convenience component with default shallow equality check for sCU.
*/ function PureComponent(props, context, updater) { this.props = props; this.context = context; // If a component has string refs, we will assign a different object later. this.refs = emptyObject; this.updater = updater || ReactNoopUpdateQueue;
}
var pureComponentPrototype = PureComponent.prototype = new ComponentDummy();
pureComponentPrototype.constructor = PureComponent; // Avoid an extra prototype jump for these methods.
objectAssign(pureComponentPrototype, Component.prototype);
pureComponentPrototype.isPureReactComponent = true;
// an immutable object with a single mutable value function createRef() { var refObject = {
current: null
};
{
Object.seal(refObject);
} return refObject;
}
var enableSchedulerDebugging = false;
/* eslint-disable no-var */
// TODO: Use symbols? var ImmediatePriority = 1; var UserBlockingPriority = 2; var NormalPriority = 3; var LowPriority = 4; var IdlePriority = 5;
// Max 31 bit integer. The max integer size in V8 for 32-bit systems. // Math.pow(2, 30) - 1 // 0b111111111111111111111111111111 var maxSigned31BitInt = 1073741823;
// Times out immediately var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out var USER_BLOCKING_PRIORITY = 250; var NORMAL_PRIORITY_TIMEOUT = 5000; var LOW_PRIORITY_TIMEOUT = 10000; // Never times out var IDLE_PRIORITY = maxSigned31BitInt;
// Callbacks are stored as a circular, doubly linked list. var firstCallbackNode = null;
var currentDidTimeout = false; // Pausing the scheduler is useful for debugging. var isSchedulerPaused = false;
var currentPriorityLevel = NormalPriority; var currentEventStartTime = -1; var currentExpirationTime = -1;
// This is set when a callback is being executed, to prevent re-entrancy. var isExecutingCallback = false;
function ensureHostCallbackIsScheduled() { if (isExecutingCallback) { // Don't schedule work yet; wait until the next time we yield. return;
} // Schedule the host callback using the earliest expiration in the list. var expirationTime = firstCallbackNode.expirationTime; if (!isHostCallbackScheduled) {
isHostCallbackScheduled = true;
} else { // Cancel the existing host callback.
cancelHostCallback();
}
requestHostCallback(flushWork, expirationTime);
}
function flushFirstCallback() { var flushedNode = firstCallbackNode;
// Remove the node from the list before calling the callback. That way the // list is in a consistent state even if the callback throws. var next = firstCallbackNode.next; if (firstCallbackNode === next) { // This is the last callback in the list.
firstCallbackNode = null;
next = null;
} else { var lastCallbackNode = firstCallbackNode.previous;
firstCallbackNode = lastCallbackNode.next = next;
next.previous = lastCallbackNode;
}
flushedNode.next = flushedNode.previous = null;
// Now it's safe to call the callback. var callback = flushedNode.callback; var expirationTime = flushedNode.expirationTime; var priorityLevel = flushedNode.priorityLevel; var previousPriorityLevel = currentPriorityLevel; var previousExpirationTime = currentExpirationTime;
currentPriorityLevel = priorityLevel;
currentExpirationTime = expirationTime; var continuationCallback; try {
continuationCallback = callback();
} finally {
currentPriorityLevel = previousPriorityLevel;
currentExpirationTime = previousExpirationTime;
}
// A callback may return a continuation. The continuation should be scheduled // with the same priority and expiration as the just-finished callback. if (typeof continuationCallback === 'function') { var continuationNode = {
callback: continuationCallback,
priorityLevel: priorityLevel,
expirationTime: expirationTime,
next: null,
previous: null
};
// Insert the new callback into the list, sorted by its expiration. This is // almost the same as the code in `scheduleCallback`, except the callback // is inserted into the list *before* callbacks of equal expiration instead // of after. if (firstCallbackNode === null) { // This is the first callback in the list.
firstCallbackNode = continuationNode.next = continuationNode.previous = continuationNode;
} else { var nextAfterContinuation = null; var node = firstCallbackNode; do { if (node.expirationTime >= expirationTime) { // This callback expires at or after the continuation. We will insert // the continuation *before* this callback.
nextAfterContinuation = node; break;
}
node = node.next;
} while (node !== firstCallbackNode);
if (nextAfterContinuation === null) { // No equal or lower priority callback was found, which means the new // callback is the lowest priority callback in the list.
nextAfterContinuation = firstCallbackNode;
} elseif (nextAfterContinuation === firstCallbackNode) { // The new callback is the highest priority callback in the list.
firstCallbackNode = continuationNode;
ensureHostCallbackIsScheduled();
}
function flushImmediateWork() { if ( // Confirm we've exited the outer most event handler
currentEventStartTime === -1 && firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority) {
isExecutingCallback = true; try { do {
flushFirstCallback();
} while ( // Keep flushing until there are no more immediate callbacks
firstCallbackNode !== null && firstCallbackNode.priorityLevel === ImmediatePriority);
} finally {
isExecutingCallback = false; if (firstCallbackNode !== null) { // There's still work remaining. Request another callback.
ensureHostCallbackIsScheduled();
} else {
isHostCallbackScheduled = false;
}
}
}
}
function flushWork(didTimeout) { // Exit right away if we're currently paused
if (enableSchedulerDebugging && isSchedulerPaused) { return;
}
isExecutingCallback = true; var previousDidTimeout = currentDidTimeout;
currentDidTimeout = didTimeout; try { if (didTimeout) { // Flush all the expired callbacks without yielding. while (firstCallbackNode !== null && !(enableSchedulerDebugging && isSchedulerPaused)) { // TODO Wrap in feature flag // Read the current time. Flush all the callbacks that expire at or // earlier than that time. Then read the current time again and repeat. // This optimizes for as few performance.now calls as possible. var currentTime = getCurrentTime(); if (firstCallbackNode.expirationTime <= currentTime) { do {
flushFirstCallback();
} while (firstCallbackNode !== null && firstCallbackNode.expirationTime <= currentTime && !(enableSchedulerDebugging && isSchedulerPaused)); continue;
} break;
}
} else { // Keep flushing callbacks until we run out of time in the frame. if (firstCallbackNode !== null) { do { if (enableSchedulerDebugging && isSchedulerPaused) { break;
}
flushFirstCallback();
} while (firstCallbackNode !== null && !shouldYieldToHost());
}
}
} finally {
isExecutingCallback = false;
currentDidTimeout = previousDidTimeout; if (firstCallbackNode !== null) { // There's still work remaining. Request another callback.
ensureHostCallbackIsScheduled();
} else {
isHostCallbackScheduled = false;
} // Before exiting, flush all the immediate work that was scheduled.
flushImmediateWork();
}
}
function unstable_runWithPriority(priorityLevel, eventHandler) { switch (priorityLevel) { case ImmediatePriority: case UserBlockingPriority: case NormalPriority: case LowPriority: case IdlePriority: break; default:
priorityLevel = NormalPriority;
}
var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime;
currentPriorityLevel = priorityLevel;
currentEventStartTime = getCurrentTime();
// Before exiting, flush all the immediate work that was scheduled.
flushImmediateWork();
}
}
function unstable_next(eventHandler) { var priorityLevel = void 0; switch (currentPriorityLevel) { case ImmediatePriority: case UserBlockingPriority: case NormalPriority: // Shift down to normal priority
priorityLevel = NormalPriority; break; default: // Anything lower than normal priority should remain at the current level.
priorityLevel = currentPriorityLevel; break;
}
var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime;
currentPriorityLevel = priorityLevel;
currentEventStartTime = getCurrentTime();
// Before exiting, flush all the immediate work that was scheduled.
flushImmediateWork();
}
}
function unstable_wrapCallback(callback) { var parentPriorityLevel = currentPriorityLevel; returnfunction () { // This is a fork of runWithPriority, inlined for performance. var previousPriorityLevel = currentPriorityLevel; var previousEventStartTime = currentEventStartTime;
currentPriorityLevel = parentPriorityLevel;
currentEventStartTime = getCurrentTime();
// Insert the new callback into the list, ordered first by expiration, then
// by insertion. So the new callback is inserted any other callback with
// equal expiration.
if (firstCallbackNode === null) {
// This is the first callback in the list.
firstCallbackNode = newNode.next = newNode.previous = newNode;
ensureHostCallbackIsScheduled();
} else {
var next = null;
var node = firstCallbackNode;
do {
if (node.expirationTime > expirationTime) {
// The new callback expires before this one.
next = node;
break;
}
node = node.next;
} while (node !== firstCallbackNode);
if (next === null) {
// No callback with a later expiration was found, which means the new
// callback has the latest expiration in the list.
next = firstCallbackNode;
} else if (next === firstCallbackNode) {
// The new callback has the earliest expiration in the entire list.
firstCallbackNode = newNode;
ensureHostCallbackIsScheduled();
}
function unstable_pauseExecution() {
isSchedulerPaused = true;
}
function unstable_continueExecution() {
isSchedulerPaused = false;
if (firstCallbackNode !== null) {
ensureHostCallbackIsScheduled();
}
}
function unstable_getFirstCallbackNode() {
return firstCallbackNode;
}
function unstable_cancelCallback(callbackNode) {
var next = callbackNode.next;
if (next === null) {
// Already cancelled.
return;
}
if (next === callbackNode) {
// This is the only scheduled callback. Clear the list.
firstCallbackNode = null;
} else {
// Remove the callback from its position in the list.
if (callbackNode === firstCallbackNode) {
firstCallbackNode = next;
}
var previous = callbackNode.previous;
previous.next = next;
next.previous = previous;
}
// The remaining code is essentially a polyfill for requestIdleCallback. It
// works by scheduling a requestAnimationFrame, storing the time for the start
// of the frame, then scheduling a postMessage which gets scheduled after paint.
// Within the postMessage handler do as much work as possible until time + frame
// rate. By separating the idle call into a separate event tick we ensure that
// layout, paint and other browser work is counted against the available time.
// The frame rate is dynamically adjusted.
// We capture a local reference to any global, in case it gets polyfilled after
// this module is initially evaluated. We want to be using a
// consistent implementation.
var localDate = Date;
// This initialization code may run even on server environments if a component
// just imports ReactDOM (e.g. for findDOMNode). Some environments might not
// have setTimeout or clearTimeout. However, we always expect them to be defined
// on the client. https://github.com/facebook/react/pull/13088
var localSetTimeout = typeof setTimeout === 'function' ? setTimeout : undefined;
var localClearTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined;
// We don't expect either of these to necessarily be defined, but we will error
// later if they are missing on the client.
var localRequestAnimationFrame = typeof requestAnimationFrame === 'function' ? requestAnimationFrame : undefined;
var localCancelAnimationFrame = typeof cancelAnimationFrame === 'function' ? cancelAnimationFrame : undefined;
var getCurrentTime;
// requestAnimationFrame does not run when the tab is in the background. If
// we're backgrounded we prefer for that work to happen so that the page
// continues to load in the background. So we also schedule a 'setTimeout' as
// a fallback.
// TODO: Need a better heuristic for backgrounded work.
var ANIMATION_FRAME_TIMEOUT = 100;
var rAFID;
var rAFTimeoutID;
var requestAnimationFrameWithTimeout = function (callback) {
// schedule rAF and also a setTimeout
rAFID = localRequestAnimationFrame(function (timestamp) {
// cancel the setTimeout
localClearTimeout(rAFTimeoutID);
callback(timestamp);
});
rAFTimeoutID = localSetTimeout(function () {
// cancel the requestAnimationFrame
localCancelAnimationFrame(rAFID);
callback(getCurrentTime());
}, ANIMATION_FRAME_TIMEOUT);
};
if (hasNativePerformanceNow) {
var Performance = performance;
getCurrentTime = function () {
return Performance.now();
};
} else {
getCurrentTime = function () {
return localDate.now();
};
}
var requestHostCallback;
var cancelHostCallback;
var shouldYieldToHost;
var globalValue = null;
if (typeof window !== 'undefined') {
globalValue = window;
} else if (typeof global !== 'undefined') {
globalValue = global;
}
if (globalValue && globalValue._schedMock) {
// Dynamic injection, only for testing purposes.
var globalImpl = globalValue._schedMock;
requestHostCallback = globalImpl[0];
cancelHostCallback = globalImpl[1];
shouldYieldToHost = globalImpl[2];
getCurrentTime = globalImpl[3];
} else if (
// If Scheduler runs in a non-DOM environment, it falls back to a naive
// implementation using setTimeout.
typeof window === 'undefined' ||
// Check if MessageChannel is supported, too.
typeof MessageChannel !== 'function') {
// If this accidentally gets imported in a non-browser environment, e.g. JavaScriptCore,
// fallback to a naive implementation.
var _callback = null;
var _flushCallback = function (didTimeout) {
if (_callback !== null) {
try {
_callback(didTimeout);
} finally {
_callback = null;
}
}
};
requestHostCallback = function (cb, ms) {
if (_callback !== null) {
// Protect against re-entrancy.
setTimeout(requestHostCallback, 0, cb);
} else {
_callback = cb;
setTimeout(_flushCallback, 0, false);
}
};
cancelHostCallback = function () {
_callback = null;
};
shouldYieldToHost = function () {
return false;
};
} else {
if (typeof console !== 'undefined') {
// TODO: Remove fb.me link
if (typeof localRequestAnimationFrame !== 'function') {
console.error("This browser doesn't support requestAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
}
if (typeof localCancelAnimationFrame !== 'function') {
console.error("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
}
}
var scheduledHostCallback = null;
var isMessageEventScheduled = false;
var timeoutTime = -1;
var isAnimationFrameScheduled = false;
var isFlushingHostCallback = false;
var frameDeadline = 0;
// We start out assuming that we run at 30fps but then the heuristic tracking
// will adjust this value to a faster fps if we get more frequent animation
// frames.
var previousFrameTime = 33;
var activeFrameTime = 33;
shouldYieldToHost = function () {
return frameDeadline <= getCurrentTime();
};
// We use the postMessage trick to defer idle work until after the repaint.
var channel = new MessageChannel();
var port = channel.port2;
channel.port1.onmessage = function (event) {
isMessageEventScheduled = false;
var prevScheduledCallback = scheduledHostCallback;
var prevTimeoutTime = timeoutTime;
scheduledHostCallback = null;
timeoutTime = -1;
var currentTime = getCurrentTime();
var didTimeout = false;
if (frameDeadline - currentTime <= 0) {
// There's no time left in this idle period. Check if the callback has
// a timeout and whether it's been exceeded.
if (prevTimeoutTime !== -1 && prevTimeoutTime <= currentTime) {
// Exceeded the timeout. Invoke the callback even though there's no
// time left.
didTimeout = true;
} else {
// No timeout.
if (!isAnimationFrameScheduled) {
// Schedule another animation callback so we retry later.
isAnimationFrameScheduled = true;
requestAnimationFrameWithTimeout(animationTick);
}
// Exit without invoking the callback.
scheduledHostCallback = prevScheduledCallback;
timeoutTime = prevTimeoutTime;
return;
}
}
var animationTick = function (rafTime) {
if (scheduledHostCallback !== null) {
// Eagerly schedule the next animation callback at the beginning of the
// frame. If the scheduler queue is not empty at the end of the frame, it
// will continue flushing inside that callback. If the queue *is* empty,
// then it will exit immediately. Posting the callback at the start of the
// frame ensures it's fired within the earliest possible frame. If we
// waited until the end of the frame to post the callback, we risk the
// browser skipping a frame and not firing the callback until the frame
// after that.
requestAnimationFrameWithTimeout(animationTick);
} else {
// No pending work. Exit.
isAnimationFrameScheduled = false;
return;
}
var nextFrameTime = rafTime - frameDeadline + activeFrameTime;
if (nextFrameTime < activeFrameTime && previousFrameTime < activeFrameTime) {
if (nextFrameTime < 8) {
// Defensive coding. We don't support higher frame rates than 120hz.
// If the calculated frame time gets lower than 8, it is probably a bug.
nextFrameTime = 8;
}
// If one frame goes long, then the next one can be short to catch up.
// If two frames are short in a row, then that's an indication that we
// actually have a higher frame rate than what we're currently optimizing.
// We adjust our heuristic dynamically accordingly. For example, if we're
// running on 120hz display or 90hz VR display.
// Take the max of the two in case one of them was an anomaly due to
// missed frame deadlines.
activeFrameTime = nextFrameTime < previousFrameTime ? previousFrameTime : nextFrameTime;
} else {
previousFrameTime = nextFrameTime;
}
frameDeadline = rafTime + activeFrameTime;
if (!isMessageEventScheduled) {
isMessageEventScheduled = true;
port.postMessage(undefined);
}
};
requestHostCallback = function (callback, absoluteTimeout) {
scheduledHostCallback = callback;
timeoutTime = absoluteTimeout;
if (isFlushingHostCallback || absoluteTimeout < 0) {
// Don't wait for the next frame. Continue working ASAP, in a new event.
port.postMessage(undefined);
} else if (!isAnimationFrameScheduled) {
// If rAF didn't already schedule one, we need to schedule a frame.
// TODO: If this rAF doesn't materialize because the browser throttles, we
// might want to still have setTimeout trigger rIC as a backup to ensure
// that we keep performing work.
isAnimationFrameScheduled = true;
requestAnimationFrameWithTimeout(animationTick);
}
};
// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:
// In some cases, StrictMode should also double-render lifecycles.
// This can be confusing for tests though,
// And it can be bad for performance in production.
// This feature flag can be used to control the behavior:
// To preserve the "Pause on caught exceptions" behavior of the debugger, we
// replay the begin phase of a failed component inside invokeGuardedCallback.
// Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:
// Gather advanced timing metrics for Profiler subtrees.
// Trace which interactions trigger each commit.
var enableSchedulerTracing = true;
// Only used in www builds.
// TODO: true? Here it might just be false.
// Only used in www builds.
// Only used in www builds.
// React Fire: prevent the value and checked attributes from syncing
// with their related DOM properties
// These APIs will no longer be "unstable" in the upcoming 16.7 release,
// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.
var enableStableConcurrentModeAPIs = false;
var DEFAULT_THREAD_ID = 0;
// Counters used to generate unique IDs.
var interactionIDCounter = 0;
var threadIDCounter = 0;
// Set of currently traced interactions.
// Interactions "stack"–
// Meaning that newly traced interactions are appended to the previously active set.
// When an interaction goes out of scope, the previous set (if any) is restored.
var interactionsRef = null;
// Listener(s) to notify when interactions begin and end.
var subscriberRef = null;
if (enableSchedulerTracing) {
interactionsRef = {
current: new Set()
};
subscriberRef = {
current: null
};
}
function unstable_clear(callback) {
if (!enableSchedulerTracing) {
return callback();
}
var prevInteractions = interactionsRef.current;
interactionsRef.current = new Set();
// Traced interactions should stack/accumulate.
// To do that, clone the current interactions.
// The previous set will be restored upon completion.
var interactions = new Set(prevInteractions);
interactions.add(interaction);
interactionsRef.current = interactions;
var subscriber = subscriberRef.current;
var returnValue = void 0;
// If no async work was scheduled for this interaction,
// Notify subscribers that it's completed.
if (subscriber !== null && interaction.__count === 0) {
subscriber.onInteractionScheduledWorkCompleted(interaction);
}
}
}
}
}
return returnValue;
}
function unstable_wrap(callback) {
var threadID = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THREAD_ID;
if (!enableSchedulerTracing) {
return callback;
}
var wrappedInteractions = interactionsRef.current;
var subscriber = subscriberRef.current;
if (subscriber !== null) {
subscriber.onWorkScheduled(wrappedInteractions, threadID);
}
// Update the pending async work count for the current interactions.
// Update after calling subscribers in case of error.
wrappedInteractions.forEach(function (interaction) {
interaction.__count++;
});
var hasRun = false;
function wrapped() {
var prevInteractions = interactionsRef.current;
interactionsRef.current = wrappedInteractions;
if (subscriber !== null) {
subscriber.onWorkStopped(wrappedInteractions, threadID);
}
}
}
return returnValue;
} finally {
if (!hasRun) {
// We only expect a wrapped function to be executed once,
// But in the event that it's executed more than once–
// Only decrement the outstanding interaction counts once.
hasRun = true;
// Update pending async counts for all wrapped interactions.
// If this was the last scheduled async work for any of them,
// Mark them as completed.
wrappedInteractions.forEach(function (interaction) {
interaction.__count--;
wrapped.cancel = function cancel() {
subscriber = subscriberRef.current;
try {
if (subscriber !== null) {
subscriber.onWorkCanceled(wrappedInteractions, threadID);
}
} finally {
// Update pending async counts for all wrapped interactions.
// If this was the last scheduled async work for any of them,
// Mark them as completed.
wrappedInteractions.forEach(function (interaction) {
interaction.__count--;
/**
* Keeps track of the current dispatcher.
*/
var ReactCurrentDispatcher = {
/**
* @internal
* @type {ReactComponent}
*/
current: null
};
/**
* Keeps track of the current owner.
*
* The current owner is the component who should own any components that are
* currently being constructed.
*/
var ReactCurrentOwner = {
/**
* @internal
* @type {ReactComponent}
*/
current: null
};
var BEFORE_SLASH_RE = /^(.*)[\\\/]/;
var describeComponentFrame = function (name, source, ownerName) {
var sourceInfo = '';
if (source) {
var path = source.fileName;
var fileName = path.replace(BEFORE_SLASH_RE, '');
{
// In DEV, include code for a common special case:
// prefer "folder/index.js" instead of just "index.js".
if (/^index\./.test(fileName)) {
var match = path.match(BEFORE_SLASH_RE);
if (match) {
var pathBeforeSlash = match[1];
if (pathBeforeSlash) {
var folderName = pathBeforeSlash.replace(BEFORE_SLASH_RE, '');
fileName = folderName + '/' + fileName;
}
}
}
}
sourceInfo = ' (at ' + fileName + ':' + source.lineNumber + ')';
} else if (ownerName) {
sourceInfo = ' (created by ' + ownerName + ')';
}
return '\n in ' + (name || 'Unknown') + sourceInfo;
};
function getComponentName(type) {
if (type == null) {
// Host root, text node or just invalid type.
return null;
}
{
if (typeof type.tag === 'number') {
warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');
}
}
if (typeof type === 'function') {
return type.displayName || type.name || null;
}
if (typeof type === 'string') {
return type;
}
switch (type) {
case REACT_CONCURRENT_MODE_TYPE:
return 'ConcurrentMode';
case REACT_FRAGMENT_TYPE:
return 'Fragment';
case REACT_PORTAL_TYPE:
return 'Portal';
case REACT_PROFILER_TYPE:
return 'Profiler';
case REACT_STRICT_MODE_TYPE:
return 'StrictMode';
case REACT_SUSPENSE_TYPE:
return 'Suspense';
}
if (typeof type === 'object') {
switch (type.$$typeof) {
case REACT_CONTEXT_TYPE:
return 'Context.Consumer';
case REACT_PROVIDER_TYPE:
return 'Context.Provider';
case REACT_FORWARD_REF_TYPE:
return getWrappedName(type, type.render, 'ForwardRef');
case REACT_MEMO_TYPE:
return getComponentName(type.type);
case REACT_LAZY_TYPE:
{
var thenable = type;
var resolvedThenable = refineResolvedLazyComponent(thenable);
if (resolvedThenable) {
return getComponentName(resolvedThenable);
}
}
}
}
return null;
}
var ReactDebugCurrentFrame = {};
var currentlyValidatingElement = null;
function setCurrentlyValidatingElement(element) {
{
currentlyValidatingElement = element;
}
}
{
// Stack implementation injected by the current renderer.
ReactDebugCurrentFrame.getCurrentStack = null;
ReactDebugCurrentFrame.getStackAddendum = function () {
var stack = '';
// Add an extra top frame while an element is being validated
if (currentlyValidatingElement) {
var name = getComponentName(currentlyValidatingElement.type);
var owner = currentlyValidatingElement._owner;
stack += describeComponentFrame(name, currentlyValidatingElement._source, owner && getComponentName(owner.type));
}
// Delegate to the injected renderer-specific implementation
var impl = ReactDebugCurrentFrame.getCurrentStack;
if (impl) {
stack += impl() || '';
}
return stack;
};
}
var ReactSharedInternals = {
ReactCurrentDispatcher: ReactCurrentDispatcher,
ReactCurrentOwner: ReactCurrentOwner,
// Used by renderers to avoid bundling object-assign twice in UMD bundles:
assign: objectAssign
};
{
// Re-export the schedule API(s) for UMD bundles.
// This avoids introducing a dependency on a new UMD global in a minor update,
// Since that would be a breaking change (e.g. for all existing CodeSandboxes).
// This re-export is only required for UMD bundles;
// CJS bundles use the shared NPM package.
objectAssign(ReactSharedInternals, {
Scheduler: {
unstable_cancelCallback: unstable_cancelCallback,
unstable_shouldYield: unstable_shouldYield,
unstable_now: getCurrentTime,
unstable_scheduleCallback: unstable_scheduleCallback,
unstable_runWithPriority: unstable_runWithPriority,
unstable_next: unstable_next,
unstable_wrapCallback: unstable_wrapCallback,
unstable_getFirstCallbackNode: unstable_getFirstCallbackNode,
unstable_pauseExecution: unstable_pauseExecution,
unstable_continueExecution: unstable_continueExecution,
unstable_getCurrentPriorityLevel: unstable_getCurrentPriorityLevel,
unstable_IdlePriority: IdlePriority,
unstable_ImmediatePriority: ImmediatePriority,
unstable_LowPriority: LowPriority,
unstable_NormalPriority: NormalPriority,
unstable_UserBlockingPriority: UserBlockingPriority
},
SchedulerTracing: {
__interactionsRef: interactionsRef,
__subscriberRef: subscriberRef,
unstable_clear: unstable_clear,
unstable_getCurrent: unstable_getCurrent,
unstable_getThreadID: unstable_getThreadID,
unstable_subscribe: unstable_subscribe,
unstable_trace: unstable_trace,
unstable_unsubscribe: unstable_unsubscribe,
unstable_wrap: unstable_wrap
}
});
}
{
objectAssign(ReactSharedInternals, {
// These should not be included in production.
ReactDebugCurrentFrame: ReactDebugCurrentFrame,
// Shim for React DOM 16.0.0 which still destructured (but not used) this.
// TODO: remove in React 17.0.
ReactComponentTreeHook: {}
});
}
/**
* Similar to invariant but only logs a warning if the condition is not met.
* This can be used to log issues in development environments in critical
* paths. Removing the logging code for production environments will keep the
* same logic and follow the same code paths.
*/
var warning = warningWithoutStack$1;
{
warning = function (condition, format) {
if (condition) {
return;
}
var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
var stack = ReactDebugCurrentFrame.getStackAddendum();
// eslint-disable-next-line react-internal/warning-and-invariant-args
var specialPropKeyWarningShown = void 0;
var specialPropRefWarningShown = void 0;
function hasValidRef(config) {
{
if (hasOwnProperty$1.call(config, 'ref')) {
var getter = Object.getOwnPropertyDescriptor(config, 'ref').get;
if (getter && getter.isReactWarning) {
return false;
}
}
}
return config.ref !== undefined;
}
function hasValidKey(config) {
{
if (hasOwnProperty$1.call(config, 'key')) {
var getter = Object.getOwnPropertyDescriptor(config, 'key').get;
if (getter && getter.isReactWarning) {
return false;
}
}
}
return config.key !== undefined;
}
function defineKeyPropWarningGetter(props, displayName) {
var warnAboutAccessingKey = function () {
if (!specialPropKeyWarningShown) {
specialPropKeyWarningShown = true;
warningWithoutStack$1(false, '%s: `key` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
}
};
warnAboutAccessingKey.isReactWarning = true;
Object.defineProperty(props, 'key', {
get: warnAboutAccessingKey,
configurable: true
});
}
function defineRefPropWarningGetter(props, displayName) {
var warnAboutAccessingRef = function () {
if (!specialPropRefWarningShown) {
specialPropRefWarningShown = true;
warningWithoutStack$1(false, '%s: `ref` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
}
};
warnAboutAccessingRef.isReactWarning = true;
Object.defineProperty(props, 'ref', {
get: warnAboutAccessingRef,
configurable: true
});
}
/**
* Factory method to create a new React element. This no longer adheres to
* the class pattern, so do not use new to call it. Also, no instanceof check
* will work. Instead test $$typeof field against Symbol.for('react.element') to check
* if something is a React Element.
*
* @param {*} type
* @param {*} key
* @param {string|object} ref
* @param {*} self A *temporary* helper to detect places where `this` is
* different from the `owner` when React.createElement is called, so that we
* can warn. We want to get rid of owner and replace string `ref`s with arrow
* functions, and as long as `this` and owner are the same, there will be no
* change in behavior.
* @param {*} source An annotation object (added by a transpiler or otherwise)
* indicating filename, line number, and/or other information.
* @param {*} owner
* @param {*} props
* @internal
*/
var ReactElement = function (type, key, ref, self, source, owner, props) {
var element = {
// This tag allows us to uniquely identify this as a React Element
$$typeof: REACT_ELEMENT_TYPE,
// Built-in properties that belong on the element type: type,
key: key,
ref: ref,
props: props,
// Record the component responsible for creating this element.
_owner: owner
};
{
// The validation flag is currently mutative. We put it on
// an external backing store so that we can freeze the whole object.
// This can be replaced with a WeakMap once they are implemented in
// commonly used development environments. element._store = {};
// To make comparing ReactElements easier for testing purposes, we make
// the validation flag non-enumerable (where possible, which should
// include every environment we run tests in), so the test framework
// ignores it.
Object.defineProperty(element._store, 'validated', {
configurable: false,
enumerable: false,
writable: true,
value: false
});
// self and source are DEV only properties.
Object.defineProperty(element, '_self', {
configurable: false,
enumerable: false,
writable: false,
value: self
});
// Two elements created in two different places should be considered
// equal for testing purposes and therefore we hide it from enumeration.
Object.defineProperty(element, '_source', {
configurable: false,
enumerable: false,
writable: false,
value: source
});
if (Object.freeze) {
Object.freeze(element.props);
Object.freeze(element);
}
}
return element;
};
/**
* Create and return a new ReactElement of the given type.
* See https://reactjs.org/docs/react-api.html#createelement
*/
function createElement(type, config, children) {
var propName = void 0;
// Reserved names are extracted
var props = {};
var key = null;
var ref = null;
var self = null;
var source = null;
if (config != null) {
if (hasValidRef(config)) {
ref = config.ref;
}
if (hasValidKey(config)) {
key = '' + config.key;
}
self = config.__self === undefined ? null : config.__self;
source = config.__source === undefined ? null : config.__source;
// Remaining properties are added to a new props object
for (propName in config) {
if (hasOwnProperty$1.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
props[propName] = config[propName];
}
}
}
// Children can be more than one argument, and those are transferred onto
// the newly allocated props object.
var childrenLength = arguments.length - 2;
if (childrenLength === 1) {
props.children = children;
} else if (childrenLength > 1) {
var childArray = Array(childrenLength);
for (var i = 0; i < childrenLength; i++) {
childArray[i] = arguments[i + 2];
}
{
if (Object.freeze) {
Object.freeze(childArray);
}
}
props.children = childArray;
}
// Resolve default props
if (type && type.defaultProps) {
var defaultProps = type.defaultProps;
for (propName in defaultProps) {
if (props[propName] === undefined) {
props[propName] = defaultProps[propName];
}
}
}
{
if (key || ref) {
var displayName = typeof type === 'function' ? type.displayName || type.name || 'Unknown' : type;
if (key) {
defineKeyPropWarningGetter(props, displayName);
}
if (ref) {
defineRefPropWarningGetter(props, displayName);
}
}
}
return ReactElement(type, key, ref, self, source, ReactCurrentOwner.current, props);
}
function cloneAndReplaceKey(oldElement, newKey) {
var newElement = ReactElement(oldElement.type, newKey, oldElement.ref, oldElement._self, oldElement._source, oldElement._owner, oldElement.props);
return newElement;
}
/**
* Clone and return a new ReactElement using element as the starting point.
* See https://reactjs.org/docs/react-api.html#cloneelement
*/
function cloneElement(element, config, children) {
!!(element === null || element === undefined) ? invariant(false, 'React.cloneElement(...): The argument must be a React element, but you passed %s.', element) : void 0;
var propName = void 0;
// Original props are copied
var props = objectAssign({}, element.props);
// Reserved names are extracted
var key = element.key;
var ref = element.ref;
// Self is preserved since the owner is preserved.
var self = element._self;
// Source is preserved since cloneElement is unlikely to be targeted by a
// transpiler, and the original source is probably a better indicator of the
// true owner.
var source = element._source;
// Owner will be preserved, unless ref is overridden
var owner = element._owner;
if (config != null) {
if (hasValidRef(config)) {
// Silently steal the ref from the parent.
ref = config.ref;
owner = ReactCurrentOwner.current;
}
if (hasValidKey(config)) {
key = '' + config.key;
}
// Remaining properties override existing props
var defaultProps = void 0;
if (element.type && element.type.defaultProps) {
defaultProps = element.type.defaultProps;
}
for (propName in config) {
if (hasOwnProperty$1.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
if (config[propName] === undefined && defaultProps !== undefined) {
// Resolve default props
props[propName] = defaultProps[propName];
} else {
props[propName] = config[propName];
}
}
}
}
// Children can be more than one argument, and those are transferred onto
// the newly allocated props object.
--> --------------------
--> maximum size reached
--> --------------------
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