\n * I'm a fade Transition!\n *
\n * )}\n * \n * \n * {state => (\n * // ...\n * )}\n * \n * \n *
\n * );\n * }\n * ```\n *\n * When the button is clicked the component will shift to the `'entering'` state\n * and stay there for 500ms (the value of `timeout`) before it finally switches\n * to `'entered'`.\n *\n * When `in` is `false` the same thing happens except the state moves from\n * `'exiting'` to `'exited'`.\n */\n\nvar Transition = /*#__PURE__*/function (_React$Component) {\n _inheritsLoose(Transition, _React$Component);\n\n function Transition(props, context) {\n var _this;\n\n _this = _React$Component.call(this, props, context) || this;\n var parentGroup = context; // In the context of a TransitionGroup all enters are really appears\n\n var appear = parentGroup && !parentGroup.isMounting ? props.enter : props.appear;\n var initialStatus;\n _this.appearStatus = null;\n\n if (props.in) {\n if (appear) {\n initialStatus = EXITED;\n _this.appearStatus = ENTERING;\n } else {\n initialStatus = ENTERED;\n }\n } else {\n if (props.unmountOnExit || props.mountOnEnter) {\n initialStatus = UNMOUNTED;\n } else {\n initialStatus = EXITED;\n }\n }\n\n _this.state = {\n status: initialStatus\n };\n _this.nextCallback = null;\n return _this;\n }\n\n Transition.getDerivedStateFromProps = function getDerivedStateFromProps(_ref, prevState) {\n var nextIn = _ref.in;\n\n if (nextIn && prevState.status === UNMOUNTED) {\n return {\n status: EXITED\n };\n }\n\n return null;\n } // getSnapshotBeforeUpdate(prevProps) {\n // let nextStatus = null\n // if (prevProps !== this.props) {\n // const { status } = this.state\n // if (this.props.in) {\n // if (status !== ENTERING && status !== ENTERED) {\n // nextStatus = ENTERING\n // }\n // } else {\n // if (status === ENTERING || status === ENTERED) {\n // nextStatus = EXITING\n // }\n // }\n // }\n // return { nextStatus }\n // }\n ;\n\n var _proto = Transition.prototype;\n\n _proto.componentDidMount = function componentDidMount() {\n this.updateStatus(true, this.appearStatus);\n };\n\n _proto.componentDidUpdate = function componentDidUpdate(prevProps) {\n var nextStatus = null;\n\n if (prevProps !== this.props) {\n var status = this.state.status;\n\n if (this.props.in) {\n if (status !== ENTERING && status !== ENTERED) {\n nextStatus = ENTERING;\n }\n } else {\n if (status === ENTERING || status === ENTERED) {\n nextStatus = EXITING;\n }\n }\n }\n\n this.updateStatus(false, nextStatus);\n };\n\n _proto.componentWillUnmount = function componentWillUnmount() {\n this.cancelNextCallback();\n };\n\n _proto.getTimeouts = function getTimeouts() {\n var timeout = this.props.timeout;\n var exit, enter, appear;\n exit = enter = appear = timeout;\n\n if (timeout != null && typeof timeout !== 'number') {\n exit = timeout.exit;\n enter = timeout.enter; // TODO: remove fallback for next major\n\n appear = timeout.appear !== undefined ? timeout.appear : enter;\n }\n\n return {\n exit: exit,\n enter: enter,\n appear: appear\n };\n };\n\n _proto.updateStatus = function updateStatus(mounting, nextStatus) {\n if (mounting === void 0) {\n mounting = false;\n }\n\n if (nextStatus !== null) {\n // nextStatus will always be ENTERING or EXITING.\n this.cancelNextCallback();\n\n if (nextStatus === ENTERING) {\n this.performEnter(mounting);\n } else {\n this.performExit();\n }\n } else if (this.props.unmountOnExit && this.state.status === EXITED) {\n this.setState({\n status: UNMOUNTED\n });\n }\n };\n\n _proto.performEnter = function performEnter(mounting) {\n var _this2 = this;\n\n var enter = this.props.enter;\n var appearing = this.context ? this.context.isMounting : mounting;\n\n var _ref2 = this.props.nodeRef ? [appearing] : [ReactDOM.findDOMNode(this), appearing],\n maybeNode = _ref2[0],\n maybeAppearing = _ref2[1];\n\n var timeouts = this.getTimeouts();\n var enterTimeout = appearing ? timeouts.appear : timeouts.enter; // no enter animation skip right to ENTERED\n // if we are mounting and running this it means appear _must_ be set\n\n if (!mounting && !enter || config.disabled) {\n this.safeSetState({\n status: ENTERED\n }, function () {\n _this2.props.onEntered(maybeNode);\n });\n return;\n }\n\n this.props.onEnter(maybeNode, maybeAppearing);\n this.safeSetState({\n status: ENTERING\n }, function () {\n _this2.props.onEntering(maybeNode, maybeAppearing);\n\n _this2.onTransitionEnd(enterTimeout, function () {\n _this2.safeSetState({\n status: ENTERED\n }, function () {\n _this2.props.onEntered(maybeNode, maybeAppearing);\n });\n });\n });\n };\n\n _proto.performExit = function performExit() {\n var _this3 = this;\n\n var exit = this.props.exit;\n var timeouts = this.getTimeouts();\n var maybeNode = this.props.nodeRef ? undefined : ReactDOM.findDOMNode(this); // no exit animation skip right to EXITED\n\n if (!exit || config.disabled) {\n this.safeSetState({\n status: EXITED\n }, function () {\n _this3.props.onExited(maybeNode);\n });\n return;\n }\n\n this.props.onExit(maybeNode);\n this.safeSetState({\n status: EXITING\n }, function () {\n _this3.props.onExiting(maybeNode);\n\n _this3.onTransitionEnd(timeouts.exit, function () {\n _this3.safeSetState({\n status: EXITED\n }, function () {\n _this3.props.onExited(maybeNode);\n });\n });\n });\n };\n\n _proto.cancelNextCallback = function cancelNextCallback() {\n if (this.nextCallback !== null) {\n this.nextCallback.cancel();\n this.nextCallback = null;\n }\n };\n\n _proto.safeSetState = function safeSetState(nextState, callback) {\n // This shouldn't be necessary, but there are weird race conditions with\n // setState callbacks and unmounting in testing, so always make sure that\n // we can cancel any pending setState callbacks after we unmount.\n callback = this.setNextCallback(callback);\n this.setState(nextState, callback);\n };\n\n _proto.setNextCallback = function setNextCallback(callback) {\n var _this4 = this;\n\n var active = true;\n\n this.nextCallback = function (event) {\n if (active) {\n active = false;\n _this4.nextCallback = null;\n callback(event);\n }\n };\n\n this.nextCallback.cancel = function () {\n active = false;\n };\n\n return this.nextCallback;\n };\n\n _proto.onTransitionEnd = function onTransitionEnd(timeout, handler) {\n this.setNextCallback(handler);\n var node = this.props.nodeRef ? this.props.nodeRef.current : ReactDOM.findDOMNode(this);\n var doesNotHaveTimeoutOrListener = timeout == null && !this.props.addEndListener;\n\n if (!node || doesNotHaveTimeoutOrListener) {\n setTimeout(this.nextCallback, 0);\n return;\n }\n\n if (this.props.addEndListener) {\n var _ref3 = this.props.nodeRef ? [this.nextCallback] : [node, this.nextCallback],\n maybeNode = _ref3[0],\n maybeNextCallback = _ref3[1];\n\n this.props.addEndListener(maybeNode, maybeNextCallback);\n }\n\n if (timeout != null) {\n setTimeout(this.nextCallback, timeout);\n }\n };\n\n _proto.render = function render() {\n var status = this.state.status;\n\n if (status === UNMOUNTED) {\n return null;\n }\n\n var _this$props = this.props,\n children = _this$props.children,\n _in = _this$props.in,\n _mountOnEnter = _this$props.mountOnEnter,\n _unmountOnExit = _this$props.unmountOnExit,\n _appear = _this$props.appear,\n _enter = _this$props.enter,\n _exit = _this$props.exit,\n _timeout = _this$props.timeout,\n _addEndListener = _this$props.addEndListener,\n _onEnter = _this$props.onEnter,\n _onEntering = _this$props.onEntering,\n _onEntered = _this$props.onEntered,\n _onExit = _this$props.onExit,\n _onExiting = _this$props.onExiting,\n _onExited = _this$props.onExited,\n _nodeRef = _this$props.nodeRef,\n childProps = _objectWithoutPropertiesLoose(_this$props, [\"children\", \"in\", \"mountOnEnter\", \"unmountOnExit\", \"appear\", \"enter\", \"exit\", \"timeout\", \"addEndListener\", \"onEnter\", \"onEntering\", \"onEntered\", \"onExit\", \"onExiting\", \"onExited\", \"nodeRef\"]);\n\n return (\n /*#__PURE__*/\n // allows for nested Transitions\n React.createElement(TransitionGroupContext.Provider, {\n value: null\n }, typeof children === 'function' ? children(status, childProps) : React.cloneElement(React.Children.only(children), childProps))\n );\n };\n\n return Transition;\n}(React.Component);\n\nTransition.contextType = TransitionGroupContext;\nTransition.propTypes = process.env.NODE_ENV !== \"production\" ? {\n /**\n * A React reference to DOM element that need to transition:\n * https://stackoverflow.com/a/51127130/4671932\n *\n * - When `nodeRef` prop is used, `node` is not passed to callback functions\n * (e.g. `onEnter`) because user already has direct access to the node.\n * - When changing `key` prop of `Transition` in a `TransitionGroup` a new\n * `nodeRef` need to be provided to `Transition` with changed `key` prop\n * (see\n * [test/CSSTransition-test.js](https://github.com/reactjs/react-transition-group/blob/13435f897b3ab71f6e19d724f145596f5910581c/test/CSSTransition-test.js#L362-L437)).\n */\n nodeRef: PropTypes.shape({\n current: typeof Element === 'undefined' ? PropTypes.any : function (propValue, key, componentName, location, propFullName, secret) {\n var value = propValue[key];\n return PropTypes.instanceOf(value && 'ownerDocument' in value ? value.ownerDocument.defaultView.Element : Element)(propValue, key, componentName, location, propFullName, secret);\n }\n }),\n\n /**\n * A `function` child can be used instead of a React element. This function is\n * called with the current transition status (`'entering'`, `'entered'`,\n * `'exiting'`, `'exited'`), which can be used to apply context\n * specific props to a component.\n *\n * ```jsx\n * \n * \n * \n * \n *
\n * );\n * }\n * ```\n *\n * When the `in` prop is set to `true`, the child component will first receive\n * the class `example-enter`, then the `example-enter-active` will be added in\n * the next tick. `CSSTransition` [forces a\n * reflow](https://github.com/reactjs/react-transition-group/blob/5007303e729a74be66a21c3e2205e4916821524b/src/CSSTransition.js#L208-L215)\n * between before adding the `example-enter-active`. This is an important trick\n * because it allows us to transition between `example-enter` and\n * `example-enter-active` even though they were added immediately one after\n * another. Most notably, this is what makes it possible for us to animate\n * _appearance_.\n *\n * ```css\n * .my-node-enter {\n * opacity: 0;\n * }\n * .my-node-enter-active {\n * opacity: 1;\n * transition: opacity 200ms;\n * }\n * .my-node-exit {\n * opacity: 1;\n * }\n * .my-node-exit-active {\n * opacity: 0;\n * transition: opacity 200ms;\n * }\n * ```\n *\n * `*-active` classes represent which styles you want to animate **to**, so it's\n * important to add `transition` declaration only to them, otherwise transitions\n * might not behave as intended! This might not be obvious when the transitions\n * are symmetrical, i.e. when `*-enter-active` is the same as `*-exit`, like in\n * the example above (minus `transition`), but it becomes apparent in more\n * complex transitions.\n *\n * **Note**: If you're using the\n * [`appear`](http://reactcommunity.org/react-transition-group/transition#Transition-prop-appear)\n * prop, make sure to define styles for `.appear-*` classes as well.\n */\n\n\nvar CSSTransition = /*#__PURE__*/function (_React$Component) {\n _inheritsLoose(CSSTransition, _React$Component);\n\n function CSSTransition() {\n var _this;\n\n for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {\n args[_key] = arguments[_key];\n }\n\n _this = _React$Component.call.apply(_React$Component, [this].concat(args)) || this;\n _this.appliedClasses = {\n appear: {},\n enter: {},\n exit: {}\n };\n\n _this.onEnter = function (maybeNode, maybeAppearing) {\n var _this$resolveArgument = _this.resolveArguments(maybeNode, maybeAppearing),\n node = _this$resolveArgument[0],\n appearing = _this$resolveArgument[1];\n\n _this.removeClasses(node, 'exit');\n\n _this.addClass(node, appearing ? 'appear' : 'enter', 'base');\n\n if (_this.props.onEnter) {\n _this.props.onEnter(maybeNode, maybeAppearing);\n }\n };\n\n _this.onEntering = function (maybeNode, maybeAppearing) {\n var _this$resolveArgument2 = _this.resolveArguments(maybeNode, maybeAppearing),\n node = _this$resolveArgument2[0],\n appearing = _this$resolveArgument2[1];\n\n var type = appearing ? 'appear' : 'enter';\n\n _this.addClass(node, type, 'active');\n\n if (_this.props.onEntering) {\n _this.props.onEntering(maybeNode, maybeAppearing);\n }\n };\n\n _this.onEntered = function (maybeNode, maybeAppearing) {\n var _this$resolveArgument3 = _this.resolveArguments(maybeNode, maybeAppearing),\n node = _this$resolveArgument3[0],\n appearing = _this$resolveArgument3[1];\n\n var type = appearing ? 'appear' : 'enter';\n\n _this.removeClasses(node, type);\n\n _this.addClass(node, type, 'done');\n\n if (_this.props.onEntered) {\n _this.props.onEntered(maybeNode, maybeAppearing);\n }\n };\n\n _this.onExit = function (maybeNode) {\n var _this$resolveArgument4 = _this.resolveArguments(maybeNode),\n node = _this$resolveArgument4[0];\n\n _this.removeClasses(node, 'appear');\n\n _this.removeClasses(node, 'enter');\n\n _this.addClass(node, 'exit', 'base');\n\n if (_this.props.onExit) {\n _this.props.onExit(maybeNode);\n }\n };\n\n _this.onExiting = function (maybeNode) {\n var _this$resolveArgument5 = _this.resolveArguments(maybeNode),\n node = _this$resolveArgument5[0];\n\n _this.addClass(node, 'exit', 'active');\n\n if (_this.props.onExiting) {\n _this.props.onExiting(maybeNode);\n }\n };\n\n _this.onExited = function (maybeNode) {\n var _this$resolveArgument6 = _this.resolveArguments(maybeNode),\n node = _this$resolveArgument6[0];\n\n _this.removeClasses(node, 'exit');\n\n _this.addClass(node, 'exit', 'done');\n\n if (_this.props.onExited) {\n _this.props.onExited(maybeNode);\n }\n };\n\n _this.resolveArguments = function (maybeNode, maybeAppearing) {\n return _this.props.nodeRef ? [_this.props.nodeRef.current, maybeNode] // here `maybeNode` is actually `appearing`\n : [maybeNode, maybeAppearing];\n };\n\n _this.getClassNames = function (type) {\n var classNames = _this.props.classNames;\n var isStringClassNames = typeof classNames === 'string';\n var prefix = isStringClassNames && classNames ? classNames + \"-\" : '';\n var baseClassName = isStringClassNames ? \"\" + prefix + type : classNames[type];\n var activeClassName = isStringClassNames ? baseClassName + \"-active\" : classNames[type + \"Active\"];\n var doneClassName = isStringClassNames ? baseClassName + \"-done\" : classNames[type + \"Done\"];\n return {\n baseClassName: baseClassName,\n activeClassName: activeClassName,\n doneClassName: doneClassName\n };\n };\n\n return _this;\n }\n\n var _proto = CSSTransition.prototype;\n\n _proto.addClass = function addClass(node, type, phase) {\n var className = this.getClassNames(type)[phase + \"ClassName\"];\n\n var _this$getClassNames = this.getClassNames('enter'),\n doneClassName = _this$getClassNames.doneClassName;\n\n if (type === 'appear' && phase === 'done' && doneClassName) {\n className += \" \" + doneClassName;\n } // This is to force a repaint,\n // which is necessary in order to transition styles when adding a class name.\n\n\n if (phase === 'active') {\n /* eslint-disable no-unused-expressions */\n node && node.scrollTop;\n }\n\n if (className) {\n this.appliedClasses[type][phase] = className;\n\n _addClass(node, className);\n }\n };\n\n _proto.removeClasses = function removeClasses(node, type) {\n var _this$appliedClasses$ = this.appliedClasses[type],\n baseClassName = _this$appliedClasses$.base,\n activeClassName = _this$appliedClasses$.active,\n doneClassName = _this$appliedClasses$.done;\n this.appliedClasses[type] = {};\n\n if (baseClassName) {\n removeClass(node, baseClassName);\n }\n\n if (activeClassName) {\n removeClass(node, activeClassName);\n }\n\n if (doneClassName) {\n removeClass(node, doneClassName);\n }\n };\n\n _proto.render = function render() {\n var _this$props = this.props,\n _ = _this$props.classNames,\n props = _objectWithoutPropertiesLoose(_this$props, [\"classNames\"]);\n\n return /*#__PURE__*/React.createElement(Transition, _extends({}, props, {\n onEnter: this.onEnter,\n onEntered: this.onEntered,\n onEntering: this.onEntering,\n onExit: this.onExit,\n onExiting: this.onExiting,\n onExited: this.onExited\n }));\n };\n\n return CSSTransition;\n}(React.Component);\n\nCSSTransition.defaultProps = {\n classNames: ''\n};\nCSSTransition.propTypes = process.env.NODE_ENV !== \"production\" ? _extends({}, Transition.propTypes, {\n /**\n * The animation classNames applied to the component as it appears, enters,\n * exits or has finished the transition. A single name can be provided, which\n * will be suffixed for each stage, e.g. `classNames=\"fade\"` applies:\n *\n * - `fade-appear`, `fade-appear-active`, `fade-appear-done`\n * - `fade-enter`, `fade-enter-active`, `fade-enter-done`\n * - `fade-exit`, `fade-exit-active`, `fade-exit-done`\n *\n * A few details to note about how these classes are applied:\n *\n * 1. They are _joined_ with the ones that are already defined on the child\n * component, so if you want to add some base styles, you can use\n * `className` without worrying that it will be overridden.\n *\n * 2. If the transition component mounts with `in={false}`, no classes are\n * applied yet. You might be expecting `*-exit-done`, but if you think\n * about it, a component cannot finish exiting if it hasn't entered yet.\n *\n * 2. `fade-appear-done` and `fade-enter-done` will _both_ be applied. This\n * allows you to define different behavior for when appearing is done and\n * when regular entering is done, using selectors like\n * `.fade-enter-done:not(.fade-appear-done)`. For example, you could apply\n * an epic entrance animation when element first appears in the DOM using\n * [Animate.css](https://daneden.github.io/animate.css/). Otherwise you can\n * simply use `fade-enter-done` for defining both cases.\n *\n * Each individual classNames can also be specified independently like:\n *\n * ```js\n * classNames={{\n * appear: 'my-appear',\n * appearActive: 'my-active-appear',\n * appearDone: 'my-done-appear',\n * enter: 'my-enter',\n * enterActive: 'my-active-enter',\n * enterDone: 'my-done-enter',\n * exit: 'my-exit',\n * exitActive: 'my-active-exit',\n * exitDone: 'my-done-exit',\n * }}\n * ```\n *\n * If you want to set these classes using CSS Modules:\n *\n * ```js\n * import styles from './styles.css';\n * ```\n *\n * you might want to use camelCase in your CSS file, that way could simply\n * spread them instead of listing them one by one:\n *\n * ```js\n * classNames={{ ...styles }}\n * ```\n *\n * @type {string | {\n * appear?: string,\n * appearActive?: string,\n * appearDone?: string,\n * enter?: string,\n * enterActive?: string,\n * enterDone?: string,\n * exit?: string,\n * exitActive?: string,\n * exitDone?: string,\n * }}\n */\n classNames: classNamesShape,\n\n /**\n * A `\n * {\"I'll receive my-node-* classes\"}\n *
\n *