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react-sound-html5

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A tiny React component wich provide simple abstraption to manipulate HTML5 AudioContext API (Equalizer, visualisation, stereo, basic controls)

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/*! ***************************************************************************** Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT. See the Apache Version 2.0 License for specific language governing permissions and limitations under the License. ***************************************************************************** */ /* global Reflect, Promise */ var extendStatics = function(d, b) { extendStatics = Object.setPrototypeOf || ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; }; return extendStatics(d, b); }; function __extends(d, b) { extendStatics(d, b); function __() { this.constructor = d; } d.prototype = b === null ? 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Removing the logging code for production environments will keep the * same logic and follow the same code paths. */ var warningWithoutStack = function () {}; { warningWithoutStack = function (condition, format) { for (var _len = arguments.length, args = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) { args[_key - 2] = arguments[_key]; } if (format === undefined) { throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument'); } if (args.length > 8) { // Check before the condition to catch violations early. throw new Error('warningWithoutStack() currently supports at most 8 arguments.'); } if (condition) { return; } if (typeof console !== 'undefined') { var argsWithFormat = args.map(function (item) { return '' + item; }); argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it // breaks IE9: https://github.com/facebook/react/issues/13610 Function.prototype.apply.call(console.error, console, argsWithFormat); } try { // --- Welcome to debugging React --- // This error was thrown as a convenience so that you can use this stack // to find the callsite that caused this warning to fire. var argIndex = 0; var message = 'Warning: ' + format.replace(/%s/g, function () { return args[argIndex++]; }); throw new Error(message); } catch (x) {} }; } var warningWithoutStack$1 = warningWithoutStack; var didWarnStateUpdateForUnmountedComponent = {}; function warnNoop(publicInstance, callerName) { { var _constructor = publicInstance.constructor; var componentName = _constructor && (_constructor.displayName || _constructor.name) || 'ReactClass'; var warningKey = componentName + '.' + callerName; if (didWarnStateUpdateForUnmountedComponent[warningKey]) { return; } warningWithoutStack$1(false, "Can't call %s on a component that is not yet mounted. " + 'This is a no-op, but it might indicate a bug in your application. ' + 'Instead, assign to `this.state` directly or define a `state = {};` ' + 'class property with the desired state in the %s component.', callerName, componentName); didWarnStateUpdateForUnmountedComponent[warningKey] = true; } } /** * This is the abstract API for an update queue. */ var ReactNoopUpdateQueue = { /** * Checks whether or not this composite component is mounted. * @param {ReactClass} publicInstance The instance we want to test. * @return {boolean} True if mounted, false otherwise. * @protected * @final */ isMounted: function (publicInstance) { return false; }, /** * Forces an update. This should only be invoked when it is known with * certainty that we are **not** in a DOM transaction. * * You may want to call this when you know that some deeper aspect of the * component's state has changed but `setState` was not called. * * This will not invoke `shouldComponentUpdate`, but it will invoke * `componentWillUpdate` and `componentDidUpdate`. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {?function} callback Called after component is updated. * @param {?string} callerName name of the calling function in the public API. * @internal */ enqueueForceUpdate: function (publicInstance, callback, callerName) { warnNoop(publicInstance, 'forceUpdate'); }, /** * Replaces all of the state. Always use this or `setState` to mutate state. * You should treat `this.state` as immutable. * * There is no guarantee that `this.state` will be immediately updated, so * accessing `this.state` after calling this method may return the old value. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {object} completeState Next state. * @param {?function} callback Called after component is updated. * @param {?string} callerName name of the calling function in the public API. * @internal */ enqueueReplaceState: function (publicInstance, completeState, callback, callerName) { warnNoop(publicInstance, 'replaceState'); }, /** * Sets a subset of the state. This only exists because _pendingState is * internal. This provides a merging strategy that is not available to deep * properties which is confusing. TODO: Expose pendingState or don't use it * during the merge. * * @param {ReactClass} publicInstance The instance that should rerender. * @param {object} partialState Next partial state to be merged with state. * @param {?function} callback Called after component is updated. * @param {?string} Name of the calling function in the public API. * @internal */ enqueueSetState: function (publicInstance, partialState, callback, callerName) { warnNoop(publicInstance, 'setState'); } }; var emptyObject = {}; { Object.freeze(emptyObject); } /** * Base class helpers for the updating state of a component. */ function Component(props, context, updater) { this.props = props; this.context = context; // If a component has string refs, we will assign a different object later. this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the // renderer. this.updater = updater || ReactNoopUpdateQueue; } Component.prototype.isReactComponent = {}; /** * Sets a subset of the state. Always use this to mutate * state. You should treat `this.state` as immutable. * * There is no guarantee that `this.state` will be immediately updated, so * accessing `this.state` after calling this method may return the old value. * * There is no guarantee that calls to `setState` will run synchronously, * as they may eventually be batched together. You can provide an optional * callback that will be executed when the call to setState is actually * completed. * * When a function is provided to setState, it will be called at some point in * the future (not synchronously). It will be called with the up to date * component arguments (state, props, context). These values can be different * from this.* because your function may be called after receiveProps but before * shouldComponentUpdate, and this new state, props, and context will not yet be * assigned to this. * * @param {object|function} partialState Next partial state or function to * produce next partial state to be merged with current state. * @param {?function} callback Called after state is updated. * @final * @protected */ Component.prototype.setState = function (partialState, callback) { !(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. _assign(pureComponentPrototype, Component.prototype); pureComponentPrototype.isPureReactComponent = true; // an immutable object with a single mutable value function createRef() { var refObject = { current: null }; { Object.seal(refObject); } return refObject; } /** * Keeps track of the current dispatcher. */ var ReactCurrentDispatcher = { /** * @internal * @type {ReactComponent} */ current: null }; /** * Keeps track of the current owner. * * The current owner is the component who should own any components that are * currently being constructed. */ var ReactCurrentOwner = { /** * @internal * @type {ReactComponent} */ current: null }; var BEFORE_SLASH_RE = /^(.*)[\\\/]/; var describeComponentFrame = function (name, source, ownerName) { var sourceInfo = ''; if (source) { var path = source.fileName; var fileName = path.replace(BEFORE_SLASH_RE, ''); { // In DEV, include code for a common special case: // prefer "folder/index.js" instead of just "index.js". if (/^index\./.test(fileName)) { var match = path.match(BEFORE_SLASH_RE); if (match) { var pathBeforeSlash = match[1]; if (pathBeforeSlash) { var folderName = pathBeforeSlash.replace(BEFORE_SLASH_RE, ''); fileName = folderName + '/' + fileName; } } } } sourceInfo = ' (at ' + fileName + ':' + source.lineNumber + ')'; } else if (ownerName) { sourceInfo = ' (created by ' + ownerName + ')'; } return '\n in ' + (name || 'Unknown') + sourceInfo; }; var Resolved = 1; function refineResolvedLazyComponent(lazyComponent) { return lazyComponent._status === Resolved ? lazyComponent._result : null; } function getWrappedName(outerType, innerType, wrapperName) { var functionName = innerType.displayName || innerType.name || ''; return outerType.displayName || (functionName !== '' ? wrapperName + '(' + functionName + ')' : wrapperName); } function getComponentName(type) { if (type == null) { // Host root, text node or just invalid type. return null; } { if (typeof type.tag === 'number') { warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.'); } } if (typeof type === 'function') { return type.displayName || type.name || null; } if (typeof type === 'string') { return type; } switch (type) { case REACT_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: _assign }; { _assign(ReactSharedInternals, { // These should not be included in production. ReactDebugCurrentFrame: ReactDebugCurrentFrame, // Shim for React DOM 16.0.0 which still destructured (but not used) this. // TODO: remove in React 17.0. ReactComponentTreeHook: {} }); } /** * Similar to invariant but only logs a warning if the condition is not met. * This can be used to log issues in development environments in critical * paths. Removing the logging code for production environments will keep the * same logic and follow the same code paths. */ var warning = warningWithoutStack$1; { warning = function (condition, format) { if (condition) { return; } var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame; var stack = ReactDebugCurrentFrame.getStackAddendum(); // eslint-disable-next-line react-internal/warning-and-invariant-args for (var _len = arguments.length, args = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) { args[_key - 2] = arguments[_key]; } warningWithoutStack$1.apply(undefined, [false, format + '%s'].concat(args, [stack])); }; } var warning$1 = warning; var hasOwnProperty = Object.prototype.hasOwnProperty; var RESERVED_PROPS = { key: true, ref: true, __self: true, __source: true }; var specialPropKeyWarningShown = void 0; var specialPropRefWarningShown = void 0; function hasValidRef(config) { { if (hasOwnProperty.call(config, 'ref')) { var getter = Object.getOwnPropertyDescriptor(config, 'ref').get; if (getter && getter.isReactWarning) { return false; } } } return config.ref !== undefined; } function hasValidKey(config) { { if (hasOwnProperty.call(config, 'key')) { var getter = Object.getOwnPropertyDescriptor(config, 'key').get; if (getter && getter.isReactWarning) { return false; } } } return config.key !== undefined; } function defineKeyPropWarningGetter(props, displayName) { var warnAboutAccessingKey = function () { if (!specialPropKeyWarningShown) { specialPropKeyWarningShown = true; warningWithoutStack$1(false, '%s: `key` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName); } }; warnAboutAccessingKey.isReactWarning = true; Object.defineProperty(props, 'key', { get: warnAboutAccessingKey, configurable: true }); } function defineRefPropWarningGetter(props, displayName) { var warnAboutAccessingRef = function () { if (!specialPropRefWarningShown) { specialPropRefWarningShown = true; warningWithoutStack$1(false, '%s: `ref` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName); } }; warnAboutAccessingRef.isReactWarning = true; Object.defineProperty(props, 'ref', { get: warnAboutAccessingRef, configurable: true }); } /** * Factory method to create a new React element. This no longer adheres to * the class pattern, so do not use new to call it. Also, 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.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); } /** * Return a function that produces ReactElements of a given type. * See https://reactjs.org/docs/react-api.html#createfactory */ 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 = _assign({}, 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.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. 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]; } props.children = childArray; } return ReactElement(element.type, key, ref, self, source, owner, props); } /** * Verifies the object is a ReactElement. * See https://reactjs.org/docs/react-api.html#isvalidelement * @param {?object} object * @return {boolean} True if `object` is a ReactElement. * @final */ function isValidElement(object) { return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE; } var SEPARATOR = '.'; var SUBSEPARATOR = ':'; /** * Escape and wrap key so it is safe to use as a reactid * * @param {string} key to be escaped. * @return {string} the escaped key. */ function escape(key) { var escapeRegex = /[=:]/g; var escaperLookup = { '=': '=0', ':': '=2' }; var escapedString = ('' + key).replace(escapeRegex, function (match) { return escaperLookup[match]; }); return '$' + escapedString; } /** * TODO: Test that a single child and an array with one item have the same key * pattern. */ var didWarnAboutMaps = false; var userProvidedKeyEscapeRegex = /\/+/g; function escapeUserProvidedKey(text) { return ('' + text).replace(userProvidedKeyEscapeRegex, '$&/'); } var POOL_SIZE = 10; var traverseContextPool = []; function getPooledTraverseContext(mapResult, keyPrefix, mapFunction, mapContext) { if (traverseContextPool.length) { var traverseContext = traverseContextPool.pop(); traverseContext.result = mapResult; traverseContext.keyPrefix = keyPrefix; traverseContext.func = mapFunction; traverseContext.context = mapContext; traverseContext.count = 0; return traverseContext; } else { return { result: mapResult, keyPrefix: keyPrefix, func: mapFunction, context: mapContext, count: 0 }; } } function releaseTraverseContext(traverseContext) { traverseContext.result = null; traverseContext.keyPrefix = null; traverseContext.func = null; traverseContext.context = null; traverseContext.count = 0; if (traverseContextPool.length < POOL_SIZE) { traverseContextPool.push(traverseContext); } } /** * @param {?*} children Children tree container. * @param {!string} nameSoFar Name of the key path so far. * @param {!function} callback Callback to invoke with each child found. * @param {?*} traverseContext Used to pass information throughout the traversal * process. * @return {!number} The number of children in this subtree. */ function traverseAllChildrenImpl(children, nameSoFar, callback, traverseContext) { var type = typeof children; if (type === 'undefined' || type === 'boolean') { // All of the above are perceived as null. children = null; } var invokeCallback = false; if (children === null) { invokeCallback = true; } else { switch (type) { case 'string': case 'number': invokeCallback = true; break; case 'object': switch (children.$$typeof) { case REACT_ELEMENT_TYPE: case REACT_PORTAL_TYPE: invokeCallback = true; } } } if (invokeCallback) { callback(traverseContext, children, // If it's the only child, treat the name as if it was wrapped in an array // so that it's consistent if the number of children grows. nameSoFar === '' ? SEPARATOR + getComponentKey(children, 0) : nameSoFar); return 1; } var child = void 0; var nextName = void 0; var subtreeCount = 0; // Count of children found in the current subtree. var nextNamePrefix = nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR; if (Array.isArray(children)) { for (var i = 0; i < children.length; i++) { child = children[i]; nextName = nextNamePrefix + getComponentKey(child, i); subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext); } } else { var iteratorFn = getIteratorFn(children); if (typeof iteratorFn === 'function') { { // Warn about using Maps as children if (iteratorFn === children.entries) { !didWarnAboutMaps ? warning$1(false, 'Using Maps as children is unsupported and will likely yield ' + 'unexpected results. Convert it to a sequence/iterable of keyed ' + 'ReactElements instead.') : void 0; didWarnAboutMaps = true; } } var iterator = iteratorFn.call(children); var step = void 0; var ii = 0; while (!(step = iterator.next()).done) { child = step.value; nextName = nextNamePrefix + getComponentKey(child, ii++); subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext); } } else if (type === 'object') { var addendum = ''; { addendum = ' If you meant to render a collection of children, use an array ' + 'instead.' + ReactDebugCurrentFrame.getStackAddendum(); } var childrenString = '' + children; invariant(false, 'Objects are not valid as a React child (found: %s).%s', childrenString === '[object Object]' ? 'object with keys {' + Object.keys(children).join(', ') + '}' : childrenString, addendum); } } return subtreeCount; } /** * Traverses children that are typically specified as `props.children`, but * might also be specified through attributes: * * - `traverseAllChildren(this.props.children, ...)` * - `traverseAllChildren(this.props.leftPanelChildren, ...)` * * The `traverseContext` is an optional argument that is passed through the * entire traversal. It can be used to store accumulations or anything else that * the callback might find relevant. * * @param {?*} children Children tree object. * @param {!function} callback To invoke upon traversing each child. * @param {?*} traverseContext Context for traversal. * @return {!number} The number of children in this subtree. */ function traverseAllChildren(children, callback, traverseContext) { if (children == null) { return 0; } return traverseAllChildrenImpl(children, '', callback, traverseContext); } /** * Generate a key string that identifies a component within a set. * * @param {*} component A component that could contain a manual key. * @param {number} index Index that is used if a manual key is not provided. * @return {string} */ function getComponentKey(component, index) { // Do some typechecking here since we call this blindly. We want to ensure // that