simple-react-lightbox/dist/index.es.js

A simple but functional light-box for React.

import React, { useReducer, useContext, useRef, useState, useEffect, Children, isValidElement, cloneElement, createContext, createElement, Fragment, forwardRef, Component, useCallback } from 'react';
import PropTypes from 'prop-types';
import ReactDOM from 'react-dom';

function _typeof(obj) {
  if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
    _typeof = function (obj) {
      return typeof obj;
    };
  } else {
    _typeof = function (obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  }

  return _typeof(obj);
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

function ownKeys(object, enumerableOnly) {
  var keys = Object.keys(object);

  if (Object.getOwnPropertySymbols) {
    var symbols = Object.getOwnPropertySymbols(object);
    if (enumerableOnly) symbols = symbols.filter(function (sym) {
      return Object.getOwnPropertyDescriptor(object, sym).enumerable;
    });
    keys.push.apply(keys, symbols);
  }

  return keys;
}

function _objectSpread2(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {};

    if (i % 2) {
      ownKeys(source, true).forEach(function (key) {
        _defineProperty(target, key, source[key]);
      });
    } else if (Object.getOwnPropertyDescriptors) {
      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
    } else {
      ownKeys(source).forEach(function (key) {
        Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));
      });
    }
  }

  return target;
}

function _newArrowCheck(innerThis, boundThis) {
  if (innerThis !== boundThis) {
    throw new TypeError("Cannot instantiate an arrow function");
  }
}

function _taggedTemplateLiteral(strings, raw) {
  if (!raw) {
    raw = strings.slice(0);
  }

  return Object.freeze(Object.defineProperties(strings, {
    raw: {
      value: Object.freeze(raw)
    }
  }));
}

function _slicedToArray(arr, i) {
  return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest();
}

function _arrayWithHoles(arr) {
  if (Array.isArray(arr)) return arr;
}

function _iterableToArrayLimit(arr, i) {
  if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) {
    return;
  }

  var _arr = [];
  var _n = true;
  var _d = false;
  var _e = undefined;

  try {
    for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
      _arr.push(_s.value);

      if (i && _arr.length === i) break;
    }
  } catch (err) {
    _d = true;
    _e = err;
  } finally {
    try {
      if (!_n && _i["return"] != null) _i["return"]();
    } finally {
      if (_d) throw _e;
    }
  }

  return _arr;
}

function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance");
}

var _this = undefined;

var isEqual = require("lodash/isEqual");

var SRLCtx = React.createContext();

var SRLContextComponent = function SRLContextComponent(props) {
  var _this2 = this;

  _newArrowCheck(this, _this);

  var initialState = {
    isOpened: false,
    images: [],
    selectedImage: {
      source: "",
      caption: "",
      id: "",
      width: "",
      height: ""
    }
  };

  function reducer(state, action) {
    switch (action.type) {
      case "handleLightbox":
        return _objectSpread2({}, state, {
          isOpened: true,
          selectedImage: {
            source: action.payload.img,
            caption: action.payload.alt,
            id: action.payload.id,
            width: action.payload.width,
            height: action.payload.height
          }
        });

      case "grabImages":
        return _objectSpread2({}, state, {
          images: action.images // IE 11 -_-

        });

      case "handleCloseLightbox":
        return _objectSpread2({}, state, {
          isOpened: false
        });

      default:
        return state;
    }
  }

  var _useReducer = useReducer(reducer, initialState),
      _useReducer2 = _slicedToArray(_useReducer, 2),
      state = _useReducer2[0],
      dispatch = _useReducer2[1];

  var handleLightbox = function handleLightbox(img, alt, id, width, height) {
    _newArrowCheck(this, _this2);

    var payload = {
      img: img,
      alt: alt,
      id: id,
      width: width,
      height: height
    };

    if (!state.isOpened) {
      if (!isEqual(state.selectedImage, payload)) {
        dispatch({
          type: "handleLightbox",
          payload: payload
        });
      }
    }
  }.bind(this);

  var grabImages = function grabImages(images) {
    _newArrowCheck(this, _this2);

    // IT'S CRUCIAL TO ADD THESE CONDITIONALS CHECK OR THE DISPATCH WILL RUN INFINITELY

    /*
    First: we compare the "prev state" with the new state from the context to see if the images is not an empty array
    Second: we check if the two objects are different. In this case it means that there are multiple galleries and we want to grab the new images
    */
    if (!state.isOpened) {
      if (state.images.length < images.length || !isEqual(state.images, images)) {
        dispatch({
          type: "grabImages",
          images: images
        });
      }
    }
  }.bind(this);

  function handleCloseLightbox() {
    if (state.isOpened) {
      dispatch({
        type: "handleCloseLightbox"
      });
    }
  }

  return React.createElement(SRLCtx.Provider, {
    value: _objectSpread2({
      handleLightbox: handleLightbox,
      grabImages: grabImages,
      handleCloseLightbox: handleCloseLightbox
    }, state, {}, props)
  }, props.children);
}.bind(undefined);
SRLContextComponent.propTypes = {
  children: PropTypes.oneOfType([PropTypes.arrayOf(PropTypes.node), PropTypes.node]).isRequired
};

var _this$1 = undefined;

var SRLWrapper = function SRLWrapper(props) {
  var _this2 = this;

  _newArrowCheck(this, _this$1);

  // Imports the context
  var context = useContext(SRLCtx); // Sets a new Ref which will be used to target the div with the images

  var imagesContainer = useRef(null); // Creates a state to check if the images are set

  var _useState = useState(false),
      _useState2 = _slicedToArray(_useState, 2),
      isImageSet = _useState2[0],
      setIsImageSet = _useState2[1]; // Grabs the images and set them using setImages


  useEffect(function () {
    var _this3 = this;

    _newArrowCheck(this, _this2);

    // Gets an HTMLCollection which we need to change to a normal array.
    var collectedImages = imagesContainer.current.getElementsByTagName("img"); // Gets all the links with the "SRL" attribute. This is in case the user wants to create a "custom" gallery.

    var collectedLinks = imagesContainer.current.querySelectorAll("a[data-attribute='SRL']");
    var imagesArray = Array.prototype.slice.call(collectedImages);
    var collectedLinksArray = Array.prototype.slice.call(collectedLinks); // Checks if collectedImages is not empty (which means there were no images)
    // Checks if collectedLinks is empty which means that the user is just using images

    if (collectedImages.length > 0 && collectedLinks.length === 0) {
      if (!isImageSet) {
        var images = []; // Iterates through each image

        imagesArray.map(function (i, index) {
          var _this4 = this;

          _newArrowCheck(this, _this3);

          // Assigns a new ID attribute to the image
          i.id = "img".concat(index); // Creates a temporary image object

          var image = {
            src: i.src,
            // Grabs the "src" attribute from the image
            alt: i.alt,
            // Grabs the "alt" attribute from the image,
            id: i.id,
            // Grabs the newly created "id" attribute from the image
            width: i.width,
            // Grabs the "width" attribute from the image
            height: i.height // Grabs the "height" attribute from the image

          };
          images.push(image); // Adds an event listerner that will trigger the function to open the lightbox (passed using the Context)

          i.addEventListener("click", function (e) {
            _newArrowCheck(this, _this4);

            context.handleLightbox(e.target.src, e.target.alt, e.target.id, e.target.width, e.target.height);
          }.bind(this)); // Avoid ifinite re-rendering by changing this value to TRUE

          setIsImageSet(true);
        }.bind(this)); // Dispatch the action to set the images from the context

        context.grabImages(images);
      }
    }

    if (collectedLinks.length > 0) {
      if (collectedImages.length !== collectedLinks.length) {
        // Throws a warning if the number of links is not equal to the number of images
        console.warn("Hey. You have ".concat(collectedLinks.length, " links and ").concat(collectedImages.length, ". You likely forgot to add the data-attribute=\"SRL\" to one or more than one of your images!"));
      }

      if (!isImageSet) {
        var _images = []; // Iterates through each link

        collectedLinksArray.map(function (a, index) {
          var _this5 = this;

          _newArrowCheck(this, _this3);

          // Assigns a new ID attribute to the image (children of the link)
          a.children[0].id = "img".concat(index); // Creates a temporary image object

          var image = {
            src: a.href,
            // Grabs the "href" attribute from the link (not from the image)
            alt: a.children[0].alt,
            // Grabs the "alt" attribute from the image
            id: a.children[0].id,
            // Grabs the newly created "id" attribute from the image
            width: a.children[0].width,
            // Grabs the "width" attribute from the image
            height: a.children[0].height // Grabs the "height" attribute from the image

          };

          _images.push(image); // Adds an event listerner that will trigger the function to open the lightbox (passed using the Context)


          a.addEventListener("click", function (e) {
            _newArrowCheck(this, _this5);

            e.preventDefault();
            context.handleLightbox(
            /*
            This is slightly different from the one above as we want to grab
            the "href" attribute of the link, not the "src" attribute of the image
            */
            e.target.parentNode.href, e.target.alt, e.target.id, e.target.width, e.target.height);
          }.bind(this)); // Avoid ifinite re-rendering by changing this value to TRUE

          setIsImageSet(true);
        }.bind(this)); // Dispatch the action to set the images from the context

        context.grabImages(_images);
      }
    }
  }.bind(this), [context, isImageSet, props]);
  return React.createElement("div", {
    ref: imagesContainer
  }, props.children);
}.bind(undefined);
SRLWrapper.propTypes = {
  children: PropTypes.oneOfType([PropTypes.arrayOf(PropTypes.node), PropTypes.node]).isRequired
};

function _extends$1() {
  _extends$1 = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends$1.apply(this, arguments);
}

function _objectWithoutPropertiesLoose(source, excluded) {
  if (source == null) return {};
  var target = {};
  var sourceKeys = Object.keys(source);
  var key, i;

  for (i = 0; i < sourceKeys.length; i++) {
    key = sourceKeys[i];
    if (excluded.indexOf(key) >= 0) continue;
    target[key] = source[key];
  }

  return target;
}

function _inheritsLoose(subClass, superClass) {
  subClass.prototype = Object.create(superClass.prototype);
  subClass.prototype.constructor = subClass;
  subClass.__proto__ = superClass;
}

function hasClass(element, className) {
  if (element.classList) return !!className && element.classList.contains(className);
  return (" " + (element.className.baseVal || element.className) + " ").indexOf(" " + className + " ") !== -1;
}

function addClass(element, className) {
  if (element.classList) element.classList.add(className);else if (!hasClass(element, className)) if (typeof element.className === 'string') element.className = element.className + " " + className;else element.setAttribute('class', (element.className && element.className.baseVal || '') + " " + className);
}

function replaceClassName(origClass, classToRemove) {
  return origClass.replace(new RegExp("(^|\\s)" + classToRemove + "(?:\\s|$)", 'g'), '$1').replace(/\s+/g, ' ').replace(/^\s*|\s*$/g, '');
}

function removeClass(element, className) {
  if (element.classList) {
    element.classList.remove(className);
  } else if (typeof element.className === 'string') {
    element.className = replaceClassName(element.className, className);
  } else {
    element.setAttribute('class', replaceClassName(element.className && element.className.baseVal || '', className));
  }
}

var config = {
  disabled: false
};

var timeoutsShape = process.env.NODE_ENV !== 'production' ? PropTypes.oneOfType([PropTypes.number, PropTypes.shape({
  enter: PropTypes.number,
  exit: PropTypes.number,
  appear: PropTypes.number
}).isRequired]) : null;
var classNamesShape = process.env.NODE_ENV !== 'production' ? 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
})]) : null;

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();
      var node = ReactDOM.findDOMNode(this);

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

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

    var enter = this.props.enter;
    var appearing = this.context ? this.context.isMounting : mounting;
    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(node);
      });
      return;
    }

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

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

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

    var exit = this.props.exit;
    var timeouts = this.getTimeouts(); // no exit animation skip right to EXITED

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

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

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

  _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(node, timeout, handler) {
    this.setNextCallback(handler);
    var doesNotHaveTimeoutOrListener = timeout == null && !this.props.addEndListener;

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

    if (this.props.addEndListener) {
      this.props.addEndListener(node, this.nextCallback);
    }

    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,
        childProps = _objectWithoutPropertiesLoose(_this$props, ["children"]); // filter props for Transtition


    delete childProps.in;
    delete childProps.mountOnEnter;
    delete childProps.unmountOnExit;
    delete childProps.appear;
    delete childProps.enter;
    delete childProps.exit;
    delete childProps.timeout;
    delete childProps.addEndListener;
    delete childProps.onEnter;
    delete childProps.onEntering;
    delete childProps.onEntered;
    delete childProps.onExit;
    delete childProps.onExiting;
    delete childProps.onExited;

    if (typeof children === 'function') {
      // allows for nested Transitions
      return React.createElement(TransitionGroupContext.Provider, {
        value: null
      }, children(status, childProps));
    }

    var child = React.Children.only(children);
    return (// allows for nested Transitions
      React.createElement(TransitionGroupContext.Provider, {
        value: null
      }, React.cloneElement(child, childProps))
    );
  };

  return Transition;
}(React.Component);

Transition.contextType = TransitionGroupContext;
Transition.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * 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,

  /**
   * Normally a component is not transitioned if it is shown when the
   * `<Transition>` component mounts. If you want to transition on the first
   * mount set `appear` to `true`, and the component will transition in as soon
   * as the `<Transition>` mounts.
   *
   * > **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. **Note:** Timeouts are still used as a fallback if provided.
   *
   * ```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
   *
   * @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
   *
   * @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
   *
   * @type Function(node: HtmlElement, isAppearing: bool) -> void
   */
  onEntered: PropTypes.func,

  /**
   * Callback fired before the "exiting" status is applied.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExit: PropTypes.func,

  /**
   * Callback fired after the "exiting" status is applied.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExiting: PropTypes.func,

  /**
   * Callback fired after the "exited" status is applied.
   *
   * @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 = 0;
Transition.EXITED = 1;
Transition.ENTERING = 2;
Transition.ENTERED = 3;
Transition.EXITING = 4;

var _addClass = function addClass$1(node, classes) {
  return node && classes && classes.split(' ').forEach(function (c) {
    return addClass(node, c);
  });
};

var removeClass$1 = function removeClass$1(node, classes) {
  return node && classes && classes.split(' ').forEach(function (c) {
    return removeClass(node, c);
  });
};
/**
 * A transition component inspired by the excellent
 * [ng-animate](http://www.nganimate.org/) library, you should use it if you're
 * using CSS transitions or animations. It's built upon the
 * [`Transition`](https://reactcommunity.org/react-transition-group/transition)
 * component, so it inherits all of its props.
 *
 * `CSSTransition` applies a pair of class names during the `appear`, `enter`,
 * and `exit` states of the transition. The first class is applied and then a
 * second `*-active` class in order to activate the CSS transition. After the
 * transition, matching `*-done` class names are applied to persist the
 * transition state.
 *
 * ```jsx
 * function App() {
 *   const [inProp, setInProp] = useState(false);
 *   return (
 *     <div>
 *       <CSSTransition in={inProp} timeout={200} classNames="my-node">
 *         <div>
 *           {"I'll receive my-node-* classes"}
 *         </div>
 *       </CSSTransition>
 *       <button type="button" onClick={() => setInProp(true)}>
 *         Click to Enter
 *       </button>
 *     </div>
 *   );
 * }
 * ```
 *
 * When the `in` prop is set to `true`, the child component will first receive
 * the class `example-enter`, then the `example-enter-active` will be added in
 * the next tick. `CSSTransition` [forces a
 * reflow](https://github.com/reactjs/react-transition-group/blob/5007303e729a74be66a21c3e2205e4916821524b/src/CSSTransition.js#L208-L215)
 * between before adding the `example-enter-active`. This is an important trick
 * because it allows us to transition between `example-enter` and
 * `example-enter-active` even though they were added immediately one after
 * another. Most notably, this is what makes it possible for us to animate
 * _appearance_.
 *
 * ```css
 * .my-node-enter {
 *   opacity: 0;
 * }
 * .my-node-enter-active {
 *   opacity: 1;
 *   transition: opacity 200ms;
 * }
 * .my-node-exit {
 *   opacity: 1;
 * }
 * .my-node-exit-active {
 *   opacity: 0;
 *   transition: opacity 200ms;
 * }
 * ```
 *
 * `*-active` classes represent which styles you want to animate **to**.
 *
 * **Note**: If you're using the
 * [`appear`](http://reactcommunity.org/react-transition-group/transition#Transition-prop-appear)
 * prop, make sure to define styles for `.appear-*` classes as well.
 */


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

  function CSSTransition() {
    var _this;

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

    _this = _React$Component.call.apply(_React$Component, [this].concat(args)) || this;
    _this.appliedClasses = {
      appear: {},
      enter: {},
      exit: {}
    };

    _this.onEnter = function (node, appearing) {
      _this.removeClasses(node, 'exit');

      _this.addClass(node, appearing ? 'appear' : 'enter', 'base');

      if (_this.props.onEnter) {
        _this.props.onEnter(node, appearing);
      }
    };

    _this.onEntering = function (node, appearing) {
      var type = appearing ? 'appear' : 'enter';

      _this.addClass(node, type, 'active');

      if (_this.props.onEntering) {
        _this.props.onEntering(node, appearing);
      }
    };

    _this.onEntered = function (node, appearing) {
      var type = appearing ? 'appear' : 'enter';

      _this.removeClasses(node, type);

      _this.addClass(node, type, 'done');

      if (_this.props.onEntered) {
        _this.props.onEntered(node, appearing);
      }
    };

    _this.onExit = function (node) {
      _this.removeClasses(node, 'appear');

      _this.removeClasses(node, 'enter');

      _this.addClass(node, 'exit', 'base');

      if (_this.props.onExit) {
        _this.props.onExit(node);
      }
    };

    _this.onExiting = function (node) {
      _this.addClass(node, 'exit', 'active');

      if (_this.props.onExiting) {
        _this.props.onExiting(node);
      }
    };

    _this.onExited = function (node) {
      _this.removeClasses(node, 'exit');

      _this.addClass(node, 'exit', 'done');

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

    _this.getClassNames = function (type) {
      var classNames = _this.props.classNames;
      var isStringClassNames = typeof classNames === 'string';
      var prefix = isStringClassNames && classNames ? classNames + "-" : '';
      var baseClassName = isStringClassNames ? "" + prefix + type : classNames[type];
      var activeClassName = isStringClassNames ? baseClassName + "-active" : classNames[type + "Active"];
      var doneClassName = isStringClassNames ? baseClassName + "-done" : classNames[type + "Done"];
      return {
        baseClassName: baseClassName,
        activeClassName: activeClassName,
        doneClassName: doneClassName
      };
    };

    return _this;
  }

  var _proto = CSSTransition.prototype;

  _proto.addClass = function addClass(node, type, phase) {
    var className = this.getClassNames(type)[phase + "ClassName"];

    if (type === 'appear' && phase === 'done') {
      className += " " + this.getClassNames('enter').doneClassName;
    } // This is for to force a repaint,
    // which is necessary in order to transition styles when adding a class name.


    if (phase === 'active') {
      /* eslint-disable no-unused-expressions */
      node && node.scrollTop;
    }

    this.appliedClasses[type][phase] = className;

    _addClass(node, className);
  };

  _proto.removeClasses = function removeClasses(node, type) {
    var _this$appliedClasses$ = this.appliedClasses[type],
        baseClassName = _this$appliedClasses$.base,
        activeClassName = _this$appliedClasses$.active,
        doneClassName = _this$appliedClasses$.done;
    this.appliedClasses[type] = {};

    if (baseClassName) {
      removeClass$1(node, baseClassName);
    }

    if (activeClassName) {
      removeClass$1(node, activeClassName);
    }

    if (doneClassName) {
      removeClass$1(node, doneClassName);
    }
  };

  _proto.render = function render() {
    var _this$props = this.props,
        _ = _this$props.classNames,
        props = _objectWithoutPropertiesLoose(_this$props, ["classNames"]);

    return React.createElement(Transition, _extends$1({}, props, {
      onEnter: this.onEnter,
      onEntered: this.onEntered,
      onEntering: this.onEntering,
      onExit: this.onExit,
      onExiting: this.onExiting,
      onExited: this.onExited
    }));
  };

  return CSSTransition;
}(React.Component);

CSSTransition.defaultProps = {
  classNames: ''
};
CSSTransition.propTypes = process.env.NODE_ENV !== "production" ? _extends$1({}, Transition.propTypes, {
  /**
   * The animation classNames applied to the component as it appears, enters,
   * exits or has finished the transition. A single name can be provided and it
   * will be suffixed for each stage: e.g.
   *
   * `classNames="fade"` applies `fade-appear`, `fade-appear-active`,
   * `fade-appear-done`, `fade-enter`, `fade-enter-active`, `fade-enter-done`,
   * `fade-exit`, `fade-exit-active`, and `fade-exit-done`.
   *
   * **Note**: `fade-appear-done` and `fade-enter-done` will _both_ be applied.
   * This allows you to define different behavior for when appearing is done and
   * when regular entering is done, using selectors like
   * `.fade-enter-done:not(.fade-appear-done)`. For example, you could apply an
   * epic entrance animation when element first appears in the DOM using
   * [Animate.css](https://daneden.github.io/animate.css/). Otherwise you can
   * simply use `fade-enter-done` for defining both cases.
   *
   * Each individual classNames can also be specified independently like:
   *
   * ```js
   * classNames={{
   *  appear: 'my-appear',
   *  appearActive: 'my-active-appear',
   *  appearDone: 'my-done-appear',
   *  enter: 'my-enter',
   *  enterActive: 'my-active-enter',
   *  enterDone: 'my-done-enter',
   *  exit: 'my-exit',
   *  exitActive: 'my-active-exit',
   *  exitDone: 'my-done-exit',
   * }}
   * ```
   *
   * If you want to set these classes using CSS Modules:
   *
   * ```js
   * import styles from './styles.css';
   * ```
   *
   * you might want to use camelCase in your CSS file, that way could simply
   * spread them instead of listing them one by one:
   *
   * ```js
   * classNames={{ ...styles }}
   * ```
   *
   * @type {string | {
   *  appear?: string,
   *  appearActive?: string,
   *  appearDone?: string,
   *  enter?: string,
   *  enterActive?: string,
   *  enterDone?: string,
   *  exit?: string,
   *  exitActive?: string,
   *  exitDone?: string,
   * }}
   */
  classNames: classNamesShape,

  /**
   * A `<Transition>` callback fired immediately after the 'enter' or 'appear' class is
   * applied.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEnter: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'enter-active' or
   * 'appear-active' class is applied.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntering: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'enter' or
   * 'appear' classes are **removed** and the `done` class is added to the DOM node.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntered: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit' class is
   * applied.
   *
   * @type Function(node: HtmlElement)
   */
  onExit: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit-active' is applied.
   *
   * @type Function(node: HtmlElement)
   */
  onExiting: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit' classes
   * are **removed** and the `exit-done` class is added to the DOM node.
   *
   * @type Function(node: HtmlElement)
   */
  onExited: PropTypes.func
}) : {};

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 && isValidElement(child) ? mapFn(child) : child;
  };

  var result = Object.create(null);
  if (children) 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 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 (!isValidElement(child)) return;
    var hasPrev = key in prevChildMapping;
    var hasNext = key in nextChildMapping;
    var prevChild = prevChildMapping[key];
    var isLeaving = isValidElement(prevChild) && !prevChild.props.in; // item is new (entering)

    if (hasNext && (!hasPrev || isLeaving)) {
      // console.log('entering', key)
      children[key] = 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] = cloneElement(child, {
        in: false
      });
    } else if (hasNext && hasPrev && isValidElement(prevChild)) {
      // item hasn't changed transition states
      // copy over the last transition props;
      // console.log('unchanged', key)
      children[key] = 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(_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
    };
  };

  _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$1({}, 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 React.createElement(TransitionGroupContext.Provider, {
        value: contextValue
      }, children);
    }

    return React.createElement(TransitionGroupContext.Provider, {
      value: contextValue
    }, React.createElement(Component, props, children));
  };

  return TransitionGroup;
}(React.Component);

TransitionGroup.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * `<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,