import { p as propTypes, L as _objectWithoutPropertiesLoose } from './createCssVarsProvider-389e0b9c.js';
import { _ as _inheritsLoose } from './inheritsLoose-ac219a8d.js';
import { r as react } from './index-0473e1a2.js';
import { r as reactDom } from './index-cc8aa606.js';
import { _ as _extends } from './extends-a9cf611c.js';

var config = {
  disabled: false
};

var timeoutsShape =  propTypes.oneOfType([propTypes.number, propTypes.shape({
  enter: propTypes.number,
  exit: propTypes.number,
  appear: propTypes.number
}).isRequired]) ;
var classNamesShape =  propTypes.oneOfType([propTypes.string, propTypes.shape({
  enter: propTypes.string,
  exit: propTypes.string,
  active: propTypes.string
}), propTypes.shape({
  enter: propTypes.string,
  enterDone: propTypes.string,
  enterActive: propTypes.string,
  exit: propTypes.string,
  exitDone: propTypes.string,
  exitActive: propTypes.string
})]) ;

var TransitionGroupContext = react.createContext(null);

var UNMOUNTED = 'unmounted';
var EXITED = 'exited';
var ENTERING = 'entering';
var ENTERED = 'entered';
var EXITING = 'exiting';
/**
 * The Transition component lets you describe a transition from one component
 * state to another _over time_ with a simple declarative API. Most commonly
 * it's used to animate the mounting and unmounting of a component, but can also
 * be used to describe in-place transition states as well.
 *
 * ---
 *
 * **Note**: `Transition` is a platform-agnostic base component. If you're using
 * transitions in CSS, you'll probably want to use
 * [`CSSTransition`](https://reactcommunity.org/react-transition-group/css-transition)
 * instead. It inherits all the features of `Transition`, but contains
 * additional features necessary to play nice with CSS transitions (hence the
 * name of the component).
 *
 * ---
 *
 * By default the `Transition` component does not alter the behavior of the
 * component it renders, it only tracks "enter" and "exit" states for the
 * components. It's up to you to give meaning and effect to those states. For
 * example we can add styles to a component when it enters or exits:
 *
 * ```jsx
 * import { Transition } from 'react-transition-group';
 *
 * const duration = 300;
 *
 * const defaultStyle = {
 *   transition: `opacity ${duration}ms ease-in-out`,
 *   opacity: 0,
 * }
 *
 * const transitionStyles = {
 *   entering: { opacity: 1 },
 *   entered:  { opacity: 1 },
 *   exiting:  { opacity: 0 },
 *   exited:  { opacity: 0 },
 * };
 *
 * const Fade = ({ in: inProp }) => (
 *   <Transition in={inProp} timeout={duration}>
 *     {state => (
 *       <div style={{
 *         ...defaultStyle,
 *         ...transitionStyles[state]
 *       }}>
 *         I'm a fade Transition!
 *       </div>
 *     )}
 *   </Transition>
 * );
 * ```
 *
 * There are 4 main states a Transition can be in:
 *  - `'entering'`
 *  - `'entered'`
 *  - `'exiting'`
 *  - `'exited'`
 *
 * Transition state is toggled via the `in` prop. When `true` the component
 * begins the "Enter" stage. During this stage, the component will shift from
 * its current transition state, to `'entering'` for the duration of the
 * transition and then to the `'entered'` stage once it's complete. Let's take
 * the following example (we'll use the
 * [useState](https://reactjs.org/docs/hooks-reference.html#usestate) hook):
 *
 * ```jsx
 * function App() {
 *   const [inProp, setInProp] = useState(false);
 *   return (
 *     <div>
 *       <Transition in={inProp} timeout={500}>
 *         {state => (
 *           // ...
 *         )}
 *       </Transition>
 *       <button onClick={() => setInProp(true)}>
 *         Click to Enter
 *       </button>
 *     </div>
 *   );
 * }
 * ```
 *
 * When the button is clicked the component will shift to the `'entering'` state
 * and stay there for 500ms (the value of `timeout`) before it finally switches
 * to `'entered'`.
 *
 * When `in` is `false` the same thing happens except the state moves from
 * `'exiting'` to `'exited'`.
 */

var Transition = /*#__PURE__*/function (_React$Component) {
  _inheritsLoose(Transition, _React$Component);

  function Transition(props, context) {
    var _this;

    _this = _React$Component.call(this, props, context) || this;
    var parentGroup = context; // In the context of a TransitionGroup all enters are really appears

    var appear = parentGroup && !parentGroup.isMounting ? props.enter : props.appear;
    var initialStatus;
    _this.appearStatus = null;

    if (props.in) {
      if (appear) {
        initialStatus = EXITED;
        _this.appearStatus = ENTERING;
      } else {
        initialStatus = ENTERED;
      }
    } else {
      if (props.unmountOnExit || props.mountOnEnter) {
        initialStatus = UNMOUNTED;
      } else {
        initialStatus = EXITED;
      }
    }

    _this.state = {
      status: initialStatus
    };
    _this.nextCallback = null;
    return _this;
  }

  Transition.getDerivedStateFromProps = function getDerivedStateFromProps(_ref, prevState) {
    var nextIn = _ref.in;

    if (nextIn && prevState.status === UNMOUNTED) {
      return {
        status: EXITED
      };
    }

    return null;
  } // getSnapshotBeforeUpdate(prevProps) {
  //   let nextStatus = null
  //   if (prevProps !== this.props) {
  //     const { status } = this.state
  //     if (this.props.in) {
  //       if (status !== ENTERING && status !== ENTERED) {
  //         nextStatus = ENTERING
  //       }
  //     } else {
  //       if (status === ENTERING || status === ENTERED) {
  //         nextStatus = EXITING
  //       }
  //     }
  //   }
  //   return { nextStatus }
  // }
  ;

  var _proto = Transition.prototype;

  _proto.componentDidMount = function componentDidMount() {
    this.updateStatus(true, this.appearStatus);
  };

  _proto.componentDidUpdate = function componentDidUpdate(prevProps) {
    var nextStatus = null;

    if (prevProps !== this.props) {
      var status = this.state.status;

      if (this.props.in) {
        if (status !== ENTERING && status !== ENTERED) {
          nextStatus = ENTERING;
        }
      } else {
        if (status === ENTERING || status === ENTERED) {
          nextStatus = EXITING;
        }
      }
    }

    this.updateStatus(false, nextStatus);
  };

  _proto.componentWillUnmount = function componentWillUnmount() {
    this.cancelNextCallback();
  };

  _proto.getTimeouts = function getTimeouts() {
    var timeout = this.props.timeout;
    var exit, enter, appear;
    exit = enter = appear = timeout;

    if (timeout != null && typeof timeout !== 'number') {
      exit = timeout.exit;
      enter = timeout.enter; // TODO: remove fallback for next major

      appear = timeout.appear !== undefined ? timeout.appear : enter;
    }

    return {
      exit: exit,
      enter: enter,
      appear: appear
    };
  };

  _proto.updateStatus = function updateStatus(mounting, nextStatus) {
    if (mounting === void 0) {
      mounting = false;
    }

    if (nextStatus !== null) {
      // nextStatus will always be ENTERING or EXITING.
      this.cancelNextCallback();

      if (nextStatus === ENTERING) {
        this.performEnter(mounting);
      } else {
        this.performExit();
      }
    } else if (this.props.unmountOnExit && this.state.status === EXITED) {
      this.setState({
        status: UNMOUNTED
      });
    }
  };

  _proto.performEnter = function performEnter(mounting) {
    var _this2 = this;

    var enter = this.props.enter;
    var appearing = this.context ? this.context.isMounting : mounting;

    var _ref2 = this.props.nodeRef ? [appearing] : [reactDom.findDOMNode(this), appearing],
        maybeNode = _ref2[0],
        maybeAppearing = _ref2[1];

    var timeouts = this.getTimeouts();
    var enterTimeout = appearing ? timeouts.appear : timeouts.enter; // no enter animation skip right to ENTERED
    // if we are mounting and running this it means appear _must_ be set

    if (!mounting && !enter || config.disabled) {
      this.safeSetState({
        status: ENTERED
      }, function () {
        _this2.props.onEntered(maybeNode);
      });
      return;
    }

    this.props.onEnter(maybeNode, maybeAppearing);
    this.safeSetState({
      status: ENTERING
    }, function () {
      _this2.props.onEntering(maybeNode, maybeAppearing);

      _this2.onTransitionEnd(enterTimeout, function () {
        _this2.safeSetState({
          status: ENTERED
        }, function () {
          _this2.props.onEntered(maybeNode, maybeAppearing);
        });
      });
    });
  };

  _proto.performExit = function performExit() {
    var _this3 = this;

    var exit = this.props.exit;
    var timeouts = this.getTimeouts();
    var maybeNode = this.props.nodeRef ? undefined : reactDom.findDOMNode(this); // no exit animation skip right to EXITED

    if (!exit || config.disabled) {
      this.safeSetState({
        status: EXITED
      }, function () {
        _this3.props.onExited(maybeNode);
      });
      return;
    }

    this.props.onExit(maybeNode);
    this.safeSetState({
      status: EXITING
    }, function () {
      _this3.props.onExiting(maybeNode);

      _this3.onTransitionEnd(timeouts.exit, function () {
        _this3.safeSetState({
          status: EXITED
        }, function () {
          _this3.props.onExited(maybeNode);
        });
      });
    });
  };

  _proto.cancelNextCallback = function cancelNextCallback() {
    if (this.nextCallback !== null) {
      this.nextCallback.cancel();
      this.nextCallback = null;
    }
  };

  _proto.safeSetState = function safeSetState(nextState, callback) {
    // This shouldn't be necessary, but there are weird race conditions with
    // setState callbacks and unmounting in testing, so always make sure that
    // we can cancel any pending setState callbacks after we unmount.
    callback = this.setNextCallback(callback);
    this.setState(nextState, callback);
  };

  _proto.setNextCallback = function setNextCallback(callback) {
    var _this4 = this;

    var active = true;

    this.nextCallback = function (event) {
      if (active) {
        active = false;
        _this4.nextCallback = null;
        callback(event);
      }
    };

    this.nextCallback.cancel = function () {
      active = false;
    };

    return this.nextCallback;
  };

  _proto.onTransitionEnd = function onTransitionEnd(timeout, handler) {
    this.setNextCallback(handler);
    var node = this.props.nodeRef ? this.props.nodeRef.current : reactDom.findDOMNode(this);
    var doesNotHaveTimeoutOrListener = timeout == null && !this.props.addEndListener;

    if (!node || doesNotHaveTimeoutOrListener) {
      setTimeout(this.nextCallback, 0);
      return;
    }

    if (this.props.addEndListener) {
      var _ref3 = this.props.nodeRef ? [this.nextCallback] : [node, this.nextCallback],
          maybeNode = _ref3[0],
          maybeNextCallback = _ref3[1];

      this.props.addEndListener(maybeNode, maybeNextCallback);
    }

    if (timeout != null) {
      setTimeout(this.nextCallback, timeout);
    }
  };

  _proto.render = function render() {
    var status = this.state.status;

    if (status === UNMOUNTED) {
      return null;
    }

    var _this$props = this.props,
        children = _this$props.children,
        _in = _this$props.in,
        _mountOnEnter = _this$props.mountOnEnter,
        _unmountOnExit = _this$props.unmountOnExit,
        _appear = _this$props.appear,
        _enter = _this$props.enter,
        _exit = _this$props.exit,
        _timeout = _this$props.timeout,
        _addEndListener = _this$props.addEndListener,
        _onEnter = _this$props.onEnter,
        _onEntering = _this$props.onEntering,
        _onEntered = _this$props.onEntered,
        _onExit = _this$props.onExit,
        _onExiting = _this$props.onExiting,
        _onExited = _this$props.onExited,
        _nodeRef = _this$props.nodeRef,
        childProps = _objectWithoutPropertiesLoose(_this$props, ["children", "in", "mountOnEnter", "unmountOnExit", "appear", "enter", "exit", "timeout", "addEndListener", "onEnter", "onEntering", "onEntered", "onExit", "onExiting", "onExited", "nodeRef"]);

    return (
      /*#__PURE__*/
      // allows for nested Transitions
      react.createElement(TransitionGroupContext.Provider, {
        value: null
      }, typeof children === 'function' ? children(status, childProps) : react.cloneElement(react.Children.only(children), childProps))
    );
  };

  return Transition;
}(react.Component);

Transition.contextType = TransitionGroupContext;
Transition.propTypes =  {
  /**
   * A React reference to DOM element that need to transition:
   * https://stackoverflow.com/a/51127130/4671932
   *
   *   - When `nodeRef` prop is used, `node` is not passed to callback functions
   *      (e.g. `onEnter`) because user already has direct access to the node.
   *   - When changing `key` prop of `Transition` in a `TransitionGroup` a new
   *     `nodeRef` need to be provided to `Transition` with changed `key` prop
   *     (see
   *     [test/CSSTransition-test.js](https://github.com/reactjs/react-transition-group/blob/13435f897b3ab71f6e19d724f145596f5910581c/test/CSSTransition-test.js#L362-L437)).
   */
  nodeRef: propTypes.shape({
    current: typeof Element === 'undefined' ? propTypes.any : function (propValue, key, componentName, location, propFullName, secret) {
      var value = propValue[key];
      return propTypes.instanceOf(value && 'ownerDocument' in value ? value.ownerDocument.defaultView.Element : Element)(propValue, key, componentName, location, propFullName, secret);
    }
  }),

  /**
   * A `function` child can be used instead of a React element. This function is
   * called with the current transition status (`'entering'`, `'entered'`,
   * `'exiting'`, `'exited'`), which can be used to apply context
   * specific props to a component.
   *
   * ```jsx
   * <Transition in={this.state.in} timeout={150}>
   *   {state => (
   *     <MyComponent className={`fade fade-${state}`} />
   *   )}
   * </Transition>
   * ```
   */
  children: propTypes.oneOfType([propTypes.func.isRequired, propTypes.element.isRequired]).isRequired,

  /**
   * Show the component; triggers the enter or exit states
   */
  in: propTypes.bool,

  /**
   * By default the child component is mounted immediately along with
   * the parent `Transition` component. If you want to "lazy mount" the component on the
   * first `in={true}` you can set `mountOnEnter`. After the first enter transition the component will stay
   * mounted, even on "exited", unless you also specify `unmountOnExit`.
   */
  mountOnEnter: propTypes.bool,

  /**
   * By default the child component stays mounted after it reaches the `'exited'` state.
   * Set `unmountOnExit` if you'd prefer to unmount the component after it finishes exiting.
   */
  unmountOnExit: propTypes.bool,

  /**
   * By default the child component does not perform the enter transition when
   * it first mounts, regardless of the value of `in`. If you want this
   * behavior, set both `appear` and `in` to `true`.
   *
   * > **Note**: there are no special appear states like `appearing`/`appeared`, this prop
   * > only adds an additional enter transition. However, in the
   * > `<CSSTransition>` component that first enter transition does result in
   * > additional `.appear-*` classes, that way you can choose to style it
   * > differently.
   */
  appear: propTypes.bool,

  /**
   * Enable or disable enter transitions.
   */
  enter: propTypes.bool,

  /**
   * Enable or disable exit transitions.
   */
  exit: propTypes.bool,

  /**
   * The duration of the transition, in milliseconds.
   * Required unless `addEndListener` is provided.
   *
   * You may specify a single timeout for all transitions:
   *
   * ```jsx
   * timeout={500}
   * ```
   *
   * or individually:
   *
   * ```jsx
   * timeout={{
   *  appear: 500,
   *  enter: 300,
   *  exit: 500,
   * }}
   * ```
   *
   * - `appear` defaults to the value of `enter`
   * - `enter` defaults to `0`
   * - `exit` defaults to `0`
   *
   * @type {number | { enter?: number, exit?: number, appear?: number }}
   */
  timeout: function timeout(props) {
    var pt = timeoutsShape;
    if (!props.addEndListener) pt = pt.isRequired;

    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    return pt.apply(void 0, [props].concat(args));
  },

  /**
   * Add a custom transition end trigger. Called with the transitioning
   * DOM node and a `done` callback. Allows for more fine grained transition end
   * logic. Timeouts are still used as a fallback if provided.
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * ```jsx
   * addEndListener={(node, done) => {
   *   // use the css transitionend event to mark the finish of a transition
   *   node.addEventListener('transitionend', done, false);
   * }}
   * ```
   */
  addEndListener: propTypes.func,

  /**
   * Callback fired before the "entering" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * @type Function(node: HtmlElement, isAppearing: bool) -> void
   */
  onEnter: propTypes.func,

  /**
   * Callback fired after the "entering" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntering: propTypes.func,

  /**
   * Callback fired after the "entered" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * @type Function(node: HtmlElement, isAppearing: bool) -> void
   */
  onEntered: propTypes.func,

  /**
   * Callback fired before the "exiting" status is applied.
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExit: propTypes.func,

  /**
   * Callback fired after the "exiting" status is applied.
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExiting: propTypes.func,

  /**
   * Callback fired after the "exited" status is applied.
   *
   * **Note**: when `nodeRef` prop is passed, `node` is not passed
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExited: propTypes.func
} ; // Name the function so it is clearer in the documentation

function noop() {}

Transition.defaultProps = {
  in: false,
  mountOnEnter: false,
  unmountOnExit: false,
  appear: false,
  enter: true,
  exit: true,
  onEnter: noop,
  onEntering: noop,
  onEntered: noop,
  onExit: noop,
  onExiting: noop,
  onExited: noop
};
Transition.UNMOUNTED = UNMOUNTED;
Transition.EXITED = EXITED;
Transition.ENTERING = ENTERING;
Transition.ENTERED = ENTERED;
Transition.EXITING = EXITING;

function _assertThisInitialized(self) {
  if (self === void 0) {
    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
  }

  return self;
}

/**
 * Given `this.props.children`, return an object mapping key to child.
 *
 * @param {*} children `this.props.children`
 * @return {object} Mapping of key to child
 */

function getChildMapping(children, mapFn) {
  var mapper = function mapper(child) {
    return mapFn && react.isValidElement(child) ? mapFn(child) : child;
  };

  var result = Object.create(null);
  if (children) react.Children.map(children, function (c) {
    return c;
  }).forEach(function (child) {
    // run the map function here instead so that the key is the computed one
    result[child.key] = mapper(child);
  });
  return result;
}
/**
 * When you're adding or removing children some may be added or removed in the
 * same render pass. We want to show *both* since we want to simultaneously
 * animate elements in and out. This function takes a previous set of keys
 * and a new set of keys and merges them with its best guess of the correct
 * ordering. In the future we may expose some of the utilities in
 * ReactMultiChild to make this easy, but for now React itself does not
 * directly have this concept of the union of prevChildren and nextChildren
 * so we implement it here.
 *
 * @param {object} prev prev children as returned from
 * `ReactTransitionChildMapping.getChildMapping()`.
 * @param {object} next next children as returned from
 * `ReactTransitionChildMapping.getChildMapping()`.
 * @return {object} a key set that contains all keys in `prev` and all keys
 * in `next` in a reasonable order.
 */

function mergeChildMappings(prev, next) {
  prev = prev || {};
  next = next || {};

  function getValueForKey(key) {
    return key in next ? next[key] : prev[key];
  } // For each key of `next`, the list of keys to insert before that key in
  // the combined list


  var nextKeysPending = Object.create(null);
  var pendingKeys = [];

  for (var prevKey in prev) {
    if (prevKey in next) {
      if (pendingKeys.length) {
        nextKeysPending[prevKey] = pendingKeys;
        pendingKeys = [];
      }
    } else {
      pendingKeys.push(prevKey);
    }
  }

  var i;
  var childMapping = {};

  for (var nextKey in next) {
    if (nextKeysPending[nextKey]) {
      for (i = 0; i < nextKeysPending[nextKey].length; i++) {
        var pendingNextKey = nextKeysPending[nextKey][i];
        childMapping[nextKeysPending[nextKey][i]] = getValueForKey(pendingNextKey);
      }
    }

    childMapping[nextKey] = getValueForKey(nextKey);
  } // Finally, add the keys which didn't appear before any key in `next`


  for (i = 0; i < pendingKeys.length; i++) {
    childMapping[pendingKeys[i]] = getValueForKey(pendingKeys[i]);
  }

  return childMapping;
}

function getProp(child, prop, props) {
  return props[prop] != null ? props[prop] : child.props[prop];
}

function getInitialChildMapping(props, onExited) {
  return getChildMapping(props.children, function (child) {
    return react.cloneElement(child, {
      onExited: onExited.bind(null, child),
      in: true,
      appear: getProp(child, 'appear', props),
      enter: getProp(child, 'enter', props),
      exit: getProp(child, 'exit', props)
    });
  });
}
function getNextChildMapping(nextProps, prevChildMapping, onExited) {
  var nextChildMapping = getChildMapping(nextProps.children);
  var children = mergeChildMappings(prevChildMapping, nextChildMapping);
  Object.keys(children).forEach(function (key) {
    var child = children[key];
    if (!react.isValidElement(child)) return;
    var hasPrev = (key in prevChildMapping);
    var hasNext = (key in nextChildMapping);
    var prevChild = prevChildMapping[key];
    var isLeaving = react.isValidElement(prevChild) && !prevChild.props.in; // item is new (entering)

    if (hasNext && (!hasPrev || isLeaving)) {
      // console.log('entering', key)
      children[key] = react.cloneElement(child, {
        onExited: onExited.bind(null, child),
        in: true,
        exit: getProp(child, 'exit', nextProps),
        enter: getProp(child, 'enter', nextProps)
      });
    } else if (!hasNext && hasPrev && !isLeaving) {
      // item is old (exiting)
      // console.log('leaving', key)
      children[key] = react.cloneElement(child, {
        in: false
      });
    } else if (hasNext && hasPrev && react.isValidElement(prevChild)) {
      // item hasn't changed transition states
      // copy over the last transition props;
      // console.log('unchanged', key)
      children[key] = react.cloneElement(child, {
        onExited: onExited.bind(null, child),
        in: prevChild.props.in,
        exit: getProp(child, 'exit', nextProps),
        enter: getProp(child, 'enter', nextProps)
      });
    }
  });
  return children;
}

var values = Object.values || function (obj) {
  return Object.keys(obj).map(function (k) {
    return obj[k];
  });
};

var defaultProps = {
  component: 'div',
  childFactory: function childFactory(child) {
    return child;
  }
};
/**
 * The `<TransitionGroup>` component manages a set of transition components
 * (`<Transition>` and `<CSSTransition>`) in a list. Like with the transition
 * components, `<TransitionGroup>` is a state machine for managing the mounting
 * and unmounting of components over time.
 *
 * Consider the example below. As items are removed or added to the TodoList the
 * `in` prop is toggled automatically by the `<TransitionGroup>`.
 *
 * Note that `<TransitionGroup>`  does not define any animation behavior!
 * Exactly _how_ a list item animates is up to the individual transition
 * component. This means you can mix and match animations across different list
 * items.
 */

var TransitionGroup = /*#__PURE__*/function (_React$Component) {
  _inheritsLoose(TransitionGroup, _React$Component);

  function TransitionGroup(props, context) {
    var _this;

    _this = _React$Component.call(this, props, context) || this;

    var handleExited = _this.handleExited.bind(_assertThisInitialized(_this)); // Initial children should all be entering, dependent on appear


    _this.state = {
      contextValue: {
        isMounting: true
      },
      handleExited: handleExited,
      firstRender: true
    };
    return _this;
  }

  var _proto = TransitionGroup.prototype;

  _proto.componentDidMount = function componentDidMount() {
    this.mounted = true;
    this.setState({
      contextValue: {
        isMounting: false
      }
    });
  };

  _proto.componentWillUnmount = function componentWillUnmount() {
    this.mounted = false;
  };

  TransitionGroup.getDerivedStateFromProps = function getDerivedStateFromProps(nextProps, _ref) {
    var prevChildMapping = _ref.children,
        handleExited = _ref.handleExited,
        firstRender = _ref.firstRender;
    return {
      children: firstRender ? getInitialChildMapping(nextProps, handleExited) : getNextChildMapping(nextProps, prevChildMapping, handleExited),
      firstRender: false
    };
  } // node is `undefined` when user provided `nodeRef` prop
  ;

  _proto.handleExited = function handleExited(child, node) {
    var currentChildMapping = getChildMapping(this.props.children);
    if (child.key in currentChildMapping) return;

    if (child.props.onExited) {
      child.props.onExited(node);
    }

    if (this.mounted) {
      this.setState(function (state) {
        var children = _extends({}, state.children);

        delete children[child.key];
        return {
          children: children
        };
      });
    }
  };

  _proto.render = function render() {
    var _this$props = this.props,
        Component = _this$props.component,
        childFactory = _this$props.childFactory,
        props = _objectWithoutPropertiesLoose(_this$props, ["component", "childFactory"]);

    var contextValue = this.state.contextValue;
    var children = values(this.state.children).map(childFactory);
    delete props.appear;
    delete props.enter;
    delete props.exit;

    if (Component === null) {
      return /*#__PURE__*/react.createElement(TransitionGroupContext.Provider, {
        value: contextValue
      }, children);
    }

    return /*#__PURE__*/react.createElement(TransitionGroupContext.Provider, {
      value: contextValue
    }, /*#__PURE__*/react.createElement(Component, props, children));
  };

  return TransitionGroup;
}(react.Component);

TransitionGroup.propTypes =  {
  /**
   * `<TransitionGroup>` renders a `<div>` by default. You can change this
   * behavior by providing a `component` prop.
   * If you use React v16+ and would like to avoid a wrapping `<div>` element
   * you can pass in `component={null}`. This is useful if the wrapping div
   * borks your css styles.
   */
  component: propTypes.any,

  /**
   * A set of `<Transition>` components, that are toggled `in` and out as they
   * leave. the `<TransitionGroup>` will inject specific transition props, so
   * remember to spread them through if you are wrapping the `<Transition>` as
   * with our `<Fade>` example.
   *
   * While this component is meant for multiple `Transition` or `CSSTransition`
   * children, sometimes you may want to have a single transition child with
   * content that you want to be transitioned out and in when you change it
   * (e.g. routes, images etc.) In that case you can change the `key` prop of
   * the transition child as you change its content, this will cause
   * `TransitionGroup` to transition the child out and back in.
   */
  children: propTypes.node,

  /**
   * A convenience prop that enables or disables appear animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  appear: propTypes.bool,

  /**
   * A convenience prop that enables or disables enter animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  enter: propTypes.bool,

  /**
   * A convenience prop that enables or disables exit animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  exit: propTypes.bool,

  /**
   * You may need to apply reactive updates to a child as it is exiting.
   * This is generally done by using `cloneElement` however in the case of an exiting
   * child the element has already been removed and not accessible to the consumer.
   *
   * If you do need to update a child as it leaves you can provide a `childFactory`
   * to wrap every child, even the ones that are leaving.
   *
   * @type Function(child: ReactElement) -> ReactElement
   */
  childFactory: propTypes.func
} ;
TransitionGroup.defaultProps = defaultProps;

export { ENTERING as E, TransitionGroup as T, Transition as a, ENTERED as b, classNamesShape as c, EXITING as d, TransitionGroupContext as e, config as f };
