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root = require('./_root');\n\n/** Built-in value references. */\nvar Symbol = root.Symbol;\n\nmodule.exports = Symbol;\n","var Symbol = require('./_Symbol'),\n    getRawTag = require('./_getRawTag'),\n    objectToString = require('./_objectToString');\n\n/** `Object#toString` result references. */\nvar nullTag = '[object Null]',\n    undefinedTag = '[object Undefined]';\n\n/** Built-in value references. */\nvar symToStringTag = Symbol ? 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The debounced function comes with a `cancel` method to cancel\n * delayed `func` invocations and a `flush` method to immediately invoke them.\n * Provide `options` to indicate whether `func` should be invoked on the\n * leading and/or trailing edge of the `wait` timeout. The `func` is invoked\n * with the last arguments provided to the debounced function. Subsequent\n * calls to the debounced function return the result of the last `func`\n * invocation.\n *\n * **Note:** If `leading` and `trailing` options are `true`, `func` is\n * invoked on the trailing edge of the timeout only if the debounced function\n * is invoked more than once during the `wait` timeout.\n *\n * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred\n * until to the next tick, similar to `setTimeout` with a timeout of `0`.\n *\n * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)\n * for details over the differences between `_.debounce` and `_.throttle`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Function\n * @param {Function} func The function to debounce.\n * @param {number} [wait=0] The number of milliseconds to delay.\n * @param {Object} [options={}] The options object.\n * @param {boolean} [options.leading=false]\n *  Specify invoking on the leading edge of the timeout.\n * @param {number} [options.maxWait]\n *  The maximum time `func` is allowed to be delayed before it's invoked.\n * @param {boolean} [options.trailing=true]\n *  Specify invoking on the trailing edge of the timeout.\n * @returns {Function} Returns the new debounced function.\n * @example\n *\n * // Avoid costly calculations while the window size is in flux.\n * jQuery(window).on('resize', _.debounce(calculateLayout, 150));\n *\n * // Invoke `sendMail` when clicked, debouncing subsequent calls.\n * jQuery(element).on('click', _.debounce(sendMail, 300, {\n *   'leading': true,\n *   'trailing': false\n * }));\n *\n * // Ensure `batchLog` is invoked once after 1 second of debounced calls.\n * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });\n * var source = new EventSource('/stream');\n * jQuery(source).on('message', debounced);\n *\n * // Cancel the trailing debounced invocation.\n * jQuery(window).on('popstate', debounced.cancel);\n */\nfunction debounce(func, wait, options) {\n  var lastArgs,\n      lastThis,\n      maxWait,\n      result,\n      timerId,\n      lastCallTime,\n      lastInvokeTime = 0,\n      leading = false,\n      maxing = false,\n      trailing = true;\n\n  if (typeof func != 'function') {\n    throw new TypeError(FUNC_ERROR_TEXT);\n  }\n  wait = toNumber(wait) || 0;\n  if (isObject(options)) {\n    leading = !!options.leading;\n    maxing = 'maxWait' in options;\n    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;\n    trailing = 'trailing' in options ? !!options.trailing : trailing;\n  }\n\n  function invokeFunc(time) {\n    var args = lastArgs,\n        thisArg = lastThis;\n\n    lastArgs = lastThis = undefined;\n    lastInvokeTime = time;\n    result = func.apply(thisArg, args);\n    return result;\n  }\n\n  function leadingEdge(time) {\n    // Reset any `maxWait` timer.\n    lastInvokeTime = time;\n    // Start the timer for the trailing edge.\n    timerId = setTimeout(timerExpired, wait);\n    // Invoke the leading edge.\n    return leading ? invokeFunc(time) : result;\n  }\n\n  function remainingWait(time) {\n    var timeSinceLastCall = time - lastCallTime,\n        timeSinceLastInvoke = time - lastInvokeTime,\n        timeWaiting = wait - timeSinceLastCall;\n\n    return maxing\n      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)\n      : timeWaiting;\n  }\n\n  function shouldInvoke(time) {\n    var timeSinceLastCall = time - lastCallTime,\n        timeSinceLastInvoke = time - lastInvokeTime;\n\n    // Either this is the first call, activity has stopped and we're at the\n    // trailing edge, the system time has gone backwards and we're treating\n    // it as the trailing edge, or we've hit the `maxWait` limit.\n    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||\n      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));\n  }\n\n  function timerExpired() {\n    var time = now();\n    if (shouldInvoke(time)) {\n      return trailingEdge(time);\n    }\n    // Restart the timer.\n    timerId = setTimeout(timerExpired, remainingWait(time));\n  }\n\n  function trailingEdge(time) {\n    timerId = undefined;\n\n    // Only invoke if we have `lastArgs` which means `func` has been\n    // debounced at least once.\n    if (trailing && lastArgs) {\n      return invokeFunc(time);\n    }\n    lastArgs = lastThis = undefined;\n    return result;\n  }\n\n  function cancel() {\n    if (timerId !== undefined) {\n      clearTimeout(timerId);\n    }\n    lastInvokeTime = 0;\n    lastArgs = lastCallTime = lastThis = timerId = undefined;\n  }\n\n  function flush() {\n    return timerId === undefined ? result : trailingEdge(now());\n  }\n\n  function debounced() {\n    var time = now(),\n        isInvoking = shouldInvoke(time);\n\n    lastArgs = arguments;\n    lastThis = this;\n    lastCallTime = time;\n\n    if (isInvoking) {\n      if (timerId === undefined) {\n        return leadingEdge(lastCallTime);\n      }\n      if (maxing) {\n        // Handle invocations in a tight loop.\n        clearTimeout(timerId);\n        timerId = setTimeout(timerExpired, wait);\n        return invokeFunc(lastCallTime);\n      }\n    }\n    if (timerId === undefined) {\n      timerId = setTimeout(timerExpired, wait);\n    }\n    return result;\n  }\n  debounced.cancel = cancel;\n  debounced.flush = flush;\n  return debounced;\n}\n\nmodule.exports = debounce;\n","/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n  var type = typeof value;\n  return value != null && (type == 'object' || type == 'function');\n}\n\nmodule.exports = isObject;\n","/**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\nfunction isObjectLike(value) {\n  return value != null && typeof value == 'object';\n}\n\nmodule.exports = isObjectLike;\n","var baseGetTag = require('./_baseGetTag'),\n    isObjectLike = require('./isObjectLike');\n\n/** `Object#toString` result references. */\nvar symbolTag = '[object Symbol]';\n\n/**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\nfunction isSymbol(value) {\n  return typeof value == 'symbol' ||\n    (isObjectLike(value) && baseGetTag(value) == symbolTag);\n}\n\nmodule.exports = isSymbol;\n","var root = require('./_root');\n\n/**\n * Gets the timestamp of the number of milliseconds that have elapsed since\n * the Unix epoch (1 January 1970 00:00:00 UTC).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Date\n * @returns {number} Returns the timestamp.\n * @example\n *\n * _.defer(function(stamp) {\n *   console.log(_.now() - stamp);\n * }, _.now());\n * // => Logs the number of milliseconds it took for the deferred invocation.\n */\nvar now = function() {\n  return root.Date.now();\n};\n\nmodule.exports = now;\n","var baseTrim = require('./_baseTrim'),\n    isObject = require('./isObject'),\n    isSymbol = require('./isSymbol');\n\n/** Used as references for various `Number` constants. */\nvar NAN = 0 / 0;\n\n/** Used to detect bad signed hexadecimal string values. */\nvar reIsBadHex = /^[-+]0x[0-9a-f]+$/i;\n\n/** Used to detect binary string values. */\nvar reIsBinary = /^0b[01]+$/i;\n\n/** Used to detect octal string values. */\nvar reIsOctal = /^0o[0-7]+$/i;\n\n/** Built-in method references without a dependency on `root`. */\nvar freeParseInt = parseInt;\n\n/**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\nfunction toNumber(value) {\n  if (typeof value == 'number') {\n    return value;\n  }\n  if (isSymbol(value)) {\n    return NAN;\n  }\n  if (isObject(value)) {\n    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n    value = isObject(other) ? (other + '') : other;\n  }\n  if (typeof value != 'string') {\n    return value === 0 ? value : +value;\n  }\n  value = baseTrim(value);\n  var isBinary = reIsBinary.test(value);\n  return (isBinary || reIsOctal.test(value))\n    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n    : (reIsBadHex.test(value) ? NAN : +value);\n}\n\nmodule.exports = toNumber;\n","// Unique ID creation requires a high quality random # generator. In the browser we therefore\n// require the crypto API and do not support built-in fallback to lower quality random number\n// generators (like Math.random()).\nvar getRandomValues;\nvar rnds8 = new Uint8Array(16);\nexport default function rng() {\n  // lazy load so that environments that need to polyfill have a chance to do so\n  if (!getRandomValues) {\n    // getRandomValues needs to be invoked in a context where \"this\" is a Crypto implementation. Also,\n    // find the complete implementation of crypto (msCrypto) on IE11.\n    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto) || typeof msCrypto !== 'undefined' && typeof msCrypto.getRandomValues === 'function' && msCrypto.getRandomValues.bind(msCrypto);\n\n    if (!getRandomValues) {\n      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');\n    }\n  }\n\n  return getRandomValues(rnds8);\n}","export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;","import REGEX from './regex.js';\n\nfunction validate(uuid) {\n  return typeof uuid === 'string' && REGEX.test(uuid);\n}\n\nexport default validate;","import validate from './validate.js';\n/**\n * Convert array of 16 byte values to UUID string format of the form:\n * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX\n */\n\nvar byteToHex = [];\n\nfor (var i = 0; i < 256; ++i) {\n  byteToHex.push((i + 0x100).toString(16).substr(1));\n}\n\nfunction stringify(arr) {\n  var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n  // Note: Be careful editing this code!  It's been tuned for performance\n  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434\n  var uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID.  If this throws, it's likely due to one\n  // of the following:\n  // - One or more input array values don't map to a hex octet (leading to\n  // \"undefined\" in the uuid)\n  // - Invalid input values for the RFC `version` or `variant` fields\n\n  if (!validate(uuid)) {\n    throw TypeError('Stringified UUID is invalid');\n  }\n\n  return uuid;\n}\n\nexport default stringify;","import rng from './rng.js';\nimport stringify from './stringify.js';\n\nfunction v4(options, buf, offset) {\n  options = options || {};\n  var rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`\n\n  rnds[6] = rnds[6] & 0x0f | 0x40;\n  rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided\n\n  if (buf) {\n    offset = offset || 0;\n\n    for (var i = 0; i < 16; ++i) {\n      buf[offset + i] = rnds[i];\n    }\n\n    return buf;\n  }\n\n  return stringify(rnds);\n}\n\nexport default v4;","import * as React from 'react';\n\nfunction _extends() {\n  _extends = Object.assign ? Object.assign.bind() : function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n    return target;\n  };\n  return _extends.apply(this, arguments);\n}\nfunction _objectWithoutPropertiesLoose(source, excluded) {\n  if (source == null) return {};\n  var target = {};\n  var sourceKeys = Object.keys(source);\n  var key, i;\n  for (i = 0; i < sourceKeys.length; i++) {\n    key = sourceKeys[i];\n    if (excluded.indexOf(key) >= 0) continue;\n    target[key] = source[key];\n  }\n  return target;\n}\n\nconst observerMap = new Map();\nconst RootIds = new WeakMap();\nlet rootId = 0;\nlet unsupportedValue = undefined;\n/**\r\n * What should be the default behavior if the IntersectionObserver is unsupported?\r\n * Ideally the polyfill has been loaded, you can have the following happen:\r\n * - `undefined`: Throw an error\r\n * - `true` or `false`: Set the `inView` value to this regardless of intersection state\r\n * **/\nfunction defaultFallbackInView(inView) {\n  unsupportedValue = inView;\n}\n/**\r\n * Generate a unique ID for the root element\r\n * @param root\r\n */\nfunction getRootId(root) {\n  if (!root) return '0';\n  if (RootIds.has(root)) return RootIds.get(root);\n  rootId += 1;\n  RootIds.set(root, rootId.toString());\n  return RootIds.get(root);\n}\n/**\r\n * Convert the options to a string Id, based on the values.\r\n * Ensures we can reuse the same observer when observing elements with the same options.\r\n * @param options\r\n */\nfunction optionsToId(options) {\n  return Object.keys(options).sort().filter(key => options[key] !== undefined).map(key => {\n    return `${key}_${key === 'root' ? getRootId(options.root) : options[key]}`;\n  }).toString();\n}\nfunction createObserver(options) {\n  // Create a unique ID for this observer instance, based on the root, root margin and threshold.\n  let id = optionsToId(options);\n  let instance = observerMap.get(id);\n  if (!instance) {\n    // Create a map of elements this observer is going to observe. Each element has a list of callbacks that should be triggered, once it comes into view.\n    const elements = new Map();\n    let thresholds;\n    const observer = new IntersectionObserver(entries => {\n      entries.forEach(entry => {\n        var _elements$get;\n        // While it would be nice if you could just look at isIntersecting to determine if the component is inside the viewport, browsers can't agree on how to use it.\n        // -Firefox ignores `threshold` when considering `isIntersecting`, so it will never be false again if `threshold` is > 0\n        const inView = entry.isIntersecting && thresholds.some(threshold => entry.intersectionRatio >= threshold);\n        // @ts-ignore support IntersectionObserver v2\n        if (options.trackVisibility && typeof entry.isVisible === 'undefined') {\n          // The browser doesn't support Intersection Observer v2, falling back to v1 behavior.\n          // @ts-ignore\n          entry.isVisible = inView;\n        }\n        (_elements$get = elements.get(entry.target)) == null ? void 0 : _elements$get.forEach(callback => {\n          callback(inView, entry);\n        });\n      });\n    }, options);\n    // Ensure we have a valid thresholds array. If not, use the threshold from the options\n    thresholds = observer.thresholds || (Array.isArray(options.threshold) ? options.threshold : [options.threshold || 0]);\n    instance = {\n      id,\n      observer,\n      elements\n    };\n    observerMap.set(id, instance);\n  }\n  return instance;\n}\n/**\r\n * @param element - DOM Element to observe\r\n * @param callback - Callback function to trigger when intersection status changes\r\n * @param options - Intersection Observer options\r\n * @param fallbackInView - Fallback inView value.\r\n * @return Function - Cleanup function that should be triggered to unregister the observer\r\n */\nfunction observe(element, callback, options = {}, fallbackInView = unsupportedValue) {\n  if (typeof window.IntersectionObserver === 'undefined' && fallbackInView !== undefined) {\n    const bounds = element.getBoundingClientRect();\n    callback(fallbackInView, {\n      isIntersecting: fallbackInView,\n      target: element,\n      intersectionRatio: typeof options.threshold === 'number' ? options.threshold : 0,\n      time: 0,\n      boundingClientRect: bounds,\n      intersectionRect: bounds,\n      rootBounds: bounds\n    });\n    return () => {\n      // Nothing to cleanup\n    };\n  }\n  // An observer with the same options can be reused, so lets use this fact\n  const {\n    id,\n    observer,\n    elements\n  } = createObserver(options);\n  // Register the callback listener for this element\n  let callbacks = elements.get(element) || [];\n  if (!elements.has(element)) {\n    elements.set(element, callbacks);\n  }\n  callbacks.push(callback);\n  observer.observe(element);\n  return function unobserve() {\n    // Remove the callback from the callback list\n    callbacks.splice(callbacks.indexOf(callback), 1);\n    if (callbacks.length === 0) {\n      // No more callback exists for element, so destroy it\n      elements.delete(element);\n      observer.unobserve(element);\n    }\n    if (elements.size === 0) {\n      // No more elements are being observer by this instance, so destroy it\n      observer.disconnect();\n      observerMap.delete(id);\n    }\n  };\n}\n\nconst _excluded = [\"children\", \"as\", \"triggerOnce\", \"threshold\", \"root\", \"rootMargin\", \"onChange\", \"skip\", \"trackVisibility\", \"delay\", \"initialInView\", \"fallbackInView\"];\nfunction isPlainChildren(props) {\n  return typeof props.children !== 'function';\n}\n/**\r\n ## Render props\r\n\n To use the `<InView>` component, you pass it a function. It will be called\r\n whenever the state changes, with the new value of `inView`. In addition to the\r\n `inView` prop, children also receive a `ref` that should be set on the\r\n containing DOM element. This is the element that the IntersectionObserver will\r\n monitor.\r\n\n If you need it, you can also access the\r\n [`IntersectionObserverEntry`](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserverEntry)\r\n on `entry`, giving you access to all the details about the current intersection\r\n state.\r\n\n ```jsx\r\n import { InView } from 'react-intersection-observer';\r\n\n const Component = () => (\r\n <InView>\r\n {({ inView, ref, entry }) => (\r\n      <div ref={ref}>\r\n        <h2>{`Header inside viewport ${inView}.`}</h2>\r\n      </div>\r\n    )}\r\n </InView>\r\n );\r\n\n export default Component;\r\n ```\r\n\n ## Plain children\r\n\n You can pass any element to the `<InView />`, and it will handle creating the\r\n wrapping DOM element. Add a handler to the `onChange` method, and control the\r\n state in your own component. Any extra props you add to `<InView>` will be\r\n passed to the HTML element, allowing you set the `className`, `style`, etc.\r\n\n ```jsx\r\n import { InView } from 'react-intersection-observer';\r\n\n const Component = () => (\r\n <InView as=\"div\" onChange={(inView, entry) => console.log('Inview:', inView)}>\r\n <h2>Plain children are always rendered. Use onChange to monitor state.</h2>\r\n </InView>\r\n );\r\n\n export default Component;\r\n ```\r\n */\nclass InView extends React.Component {\n  constructor(props) {\n    super(props);\n    this.node = null;\n    this._unobserveCb = null;\n    this.handleNode = node => {\n      if (this.node) {\n        // Clear the old observer, before we start observing a new element\n        this.unobserve();\n        if (!node && !this.props.triggerOnce && !this.props.skip) {\n          // Reset the state if we get a new node, and we aren't ignoring updates\n          this.setState({\n            inView: !!this.props.initialInView,\n            entry: undefined\n          });\n        }\n      }\n      this.node = node ? node : null;\n      this.observeNode();\n    };\n    this.handleChange = (inView, entry) => {\n      if (inView && this.props.triggerOnce) {\n        // If `triggerOnce` is true, we should stop observing the element.\n        this.unobserve();\n      }\n      if (!isPlainChildren(this.props)) {\n        // Store the current State, so we can pass it to the children in the next render update\n        // There's no reason to update the state for plain children, since it's not used in the rendering.\n        this.setState({\n          inView,\n          entry\n        });\n      }\n      if (this.props.onChange) {\n        // If the user is actively listening for onChange, always trigger it\n        this.props.onChange(inView, entry);\n      }\n    };\n    this.state = {\n      inView: !!props.initialInView,\n      entry: undefined\n    };\n  }\n  componentDidUpdate(prevProps) {\n    // If a IntersectionObserver option changed, reinit the observer\n    if (prevProps.rootMargin !== this.props.rootMargin || prevProps.root !== this.props.root || prevProps.threshold !== this.props.threshold || prevProps.skip !== this.props.skip || prevProps.trackVisibility !== this.props.trackVisibility || prevProps.delay !== this.props.delay) {\n      this.unobserve();\n      this.observeNode();\n    }\n  }\n  componentWillUnmount() {\n    this.unobserve();\n    this.node = null;\n  }\n  observeNode() {\n    if (!this.node || this.props.skip) return;\n    const {\n      threshold,\n      root,\n      rootMargin,\n      trackVisibility,\n      delay,\n      fallbackInView\n    } = this.props;\n    this._unobserveCb = observe(this.node, this.handleChange, {\n      threshold,\n      root,\n      rootMargin,\n      // @ts-ignore\n      trackVisibility,\n      // @ts-ignore\n      delay\n    }, fallbackInView);\n  }\n  unobserve() {\n    if (this._unobserveCb) {\n      this._unobserveCb();\n      this._unobserveCb = null;\n    }\n  }\n  render() {\n    if (!isPlainChildren(this.props)) {\n      const {\n        inView,\n        entry\n      } = this.state;\n      return this.props.children({\n        inView,\n        entry,\n        ref: this.handleNode\n      });\n    }\n    const _this$props = this.props,\n      {\n        children,\n        as\n      } = _this$props,\n      props = _objectWithoutPropertiesLoose(_this$props, _excluded);\n    return React.createElement(as || 'div', _extends({\n      ref: this.handleNode\n    }, props), children);\n  }\n}\n\n/**\r\n * React Hooks make it easy to monitor the `inView` state of your components. Call\r\n * the `useInView` hook with the (optional) [options](#options) you need. It will\r\n * return an array containing a `ref`, the `inView` status and the current\r\n * [`entry`](https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserverEntry).\r\n * Assign the `ref` to the DOM element you want to monitor, and the hook will\r\n * report the status.\r\n *\r\n * @example\r\n * ```jsx\r\n * import React from 'react';\r\n * import { useInView } from 'react-intersection-observer';\r\n *\r\n * const Component = () => {\r\n *   const { ref, inView, entry } = useInView({\r\n *       threshold: 0,\r\n *   });\r\n *\r\n *   return (\r\n *     <div ref={ref}>\r\n *       <h2>{`Header inside viewport ${inView}.`}</h2>\r\n *     </div>\r\n *   );\r\n * };\r\n * ```\r\n */\nfunction useInView({\n  threshold,\n  delay,\n  trackVisibility,\n  rootMargin,\n  root,\n  triggerOnce,\n  skip,\n  initialInView,\n  fallbackInView,\n  onChange\n} = {}) {\n  var _state$entry;\n  const [ref, setRef] = React.useState(null);\n  const callback = React.useRef();\n  const [state, setState] = React.useState({\n    inView: !!initialInView,\n    entry: undefined\n  });\n  // Store the onChange callback in a `ref`, so we can access the latest instance\n  // inside the `useEffect`, but without triggering a rerender.\n  callback.current = onChange;\n  React.useEffect(() => {\n    // Ensure we have node ref, and that we shouldn't skip observing\n    if (skip || !ref) return;\n    let unobserve;\n    unobserve = observe(ref, (inView, entry) => {\n      setState({\n        inView,\n        entry\n      });\n      if (callback.current) callback.current(inView, entry);\n      if (entry.isIntersecting && triggerOnce && unobserve) {\n        // If it should only trigger once, unobserve the element after it's inView\n        unobserve();\n        unobserve = undefined;\n      }\n    }, {\n      root,\n      rootMargin,\n      threshold,\n      // @ts-ignore\n      trackVisibility,\n      // @ts-ignore\n      delay\n    }, fallbackInView);\n    return () => {\n      if (unobserve) {\n        unobserve();\n      }\n    };\n  },\n  // We break the rule here, because we aren't including the actual `threshold` variable\n  // eslint-disable-next-line react-hooks/exhaustive-deps\n  [\n  // If the threshold is an array, convert it to a string, so it won't change between renders.\n  // eslint-disable-next-line react-hooks/exhaustive-deps\n  Array.isArray(threshold) ? threshold.toString() : threshold, ref, root, rootMargin, triggerOnce, skip, trackVisibility, fallbackInView, delay]);\n  const entryTarget = (_state$entry = state.entry) == null ? void 0 : _state$entry.target;\n  const previousEntryTarget = React.useRef();\n  if (!ref && entryTarget && !triggerOnce && !skip && previousEntryTarget.current !== entryTarget) {\n    // If we don't have a node ref, then reset the state (unless the hook is set to only `triggerOnce` or `skip`)\n    // This ensures we correctly reflect the current state - If you aren't observing anything, then nothing is inView\n    previousEntryTarget.current = entryTarget;\n    setState({\n      inView: !!initialInView,\n      entry: undefined\n    });\n  }\n  const result = [setRef, state.inView, state.entry];\n  // Support object destructuring, by adding the specific values.\n  result.ref = result[0];\n  result.inView = result[1];\n  result.entry = result[2];\n  return result;\n}\n\nexport { InView, defaultFallbackInView, observe, useInView };\n//# sourceMappingURL=react-intersection-observer.modern.mjs.map\n"],"names":["Symbol","root","module","exports","__webpack_require__","getRawTag","objectToString","symToStringTag","toStringTag","undefined","value","Object","trimmedEndIndex","reTrimStart","string","slice","replace","freeGlobal","g","objectProto","prototype","hasOwnProperty","nativeObjectToString","toString","isOwn","call","tag","unmasked","e","result","freeSelf","self","Function","reWhitespace","index","length","test","charAt","isObject","now","toNumber","nativeMax","Math","max","nativeMin","min","func","wait","options","lastArgs","lastThis","maxWait","timerId","lastCallTime","lastInvokeTime","leading","maxing","trailing","invokeFunc","time","args","thisArg","apply","shouldInvoke","timeSinceLastCall","timeSinceLastInvoke","timerExpired","timeWaiting","trailingEdge","setTimeout","debounced","isInvoking","arguments","clearTimeout","cancel","flush","type","baseGetTag","isObjectLike","Date","baseTrim","isSymbol","NAN","reIsBadHex","reIsBinary","reIsOctal","freeParseInt","parseInt","other","valueOf","isBinary","getRandomValues","rnds8","Uint8Array","rng","crypto","bind","msCrypto","regex","byteToHex","i","push","substr","esm_browser_stringify","arr","offset","uuid","toLowerCase","TypeError","esm_browser_v4","buf","rnds","random","unsupportedValue","observerMap","Map","RootIds","WeakMap","rootId","useInView","threshold","delay","trackVisibility","rootMargin","triggerOnce","skip","initialInView","fallbackInView","onChange","_state$entry","ref","setRef","react__WEBPACK_IMPORTED_MODULE_0__","useState","callback","useRef","state","setState","inView","entry","current","useEffect","unobserve","observe","element","window","IntersectionObserver","bounds","getBoundingClientRect","isIntersecting","target","intersectionRatio","boundingClientRect","intersectionRect","rootBounds","id","observer","elements","createObserver","keys","sort","filter","key","map","has","set","get","instance","thresholds","entries","forEach","_elements$get","some","isVisible","Array","isArray","callbacks","splice","indexOf","delete","size","disconnect","entryTarget","previousEntryTarget"],"sourceRoot":""}