@pmbs/react-resize-detector/build/index.esm.js

React resize detector

import*as React from'react';import {cloneElement,isValidElement,createRef,PureComponent,Component,forwardRef,useRef,useState,useEffect,useLayoutEffect}from'react';import {findDOMNode}from'react-dom';/*! *****************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */
/* global Reflect, Promise */

var extendStatics = function(d, b) {
    extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
    return extendStatics(d, b);
};

function __extends(d, b) {
    if (typeof b !== "function" && b !== null)
        throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
    extendStatics(d, b);
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
}

var __assign = function() {
    __assign = Object.assign || function __assign(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};

function __rest(s, e) {
    var t = {};
    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
        t[p] = s[p];
    if (s != null && typeof Object.getOwnPropertySymbols === "function")
        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
                t[p[i]] = s[p[i]];
        }
    return t;
}var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */

function isObject$3(value) {
  var type = typeof value;
  return value != null && (type == 'object' || type == 'function');
}

var isObject_1 = isObject$3;/** Detect free variable `global` from Node.js. */

var freeGlobal$1 = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

var _freeGlobal = freeGlobal$1;var freeGlobal = _freeGlobal;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root$2 = freeGlobal || freeSelf || Function('return this')();

var _root = root$2;var root$1 = _root;

/**
 * Gets the timestamp of the number of milliseconds that have elapsed since
 * the Unix epoch (1 January 1970 00:00:00 UTC).
 *
 * @static
 * @memberOf _
 * @since 2.4.0
 * @category Date
 * @returns {number} Returns the timestamp.
 * @example
 *
 * _.defer(function(stamp) {
 *   console.log(_.now() - stamp);
 * }, _.now());
 * // => Logs the number of milliseconds it took for the deferred invocation.
 */
var now$1 = function() {
  return root$1.Date.now();
};

var now_1 = now$1;/** Used to match a single whitespace character. */

var reWhitespace = /\s/;

/**
 * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
 * character of `string`.
 *
 * @private
 * @param {string} string The string to inspect.
 * @returns {number} Returns the index of the last non-whitespace character.
 */
function trimmedEndIndex$1(string) {
  var index = string.length;

  while (index-- && reWhitespace.test(string.charAt(index))) {}
  return index;
}

var _trimmedEndIndex = trimmedEndIndex$1;var trimmedEndIndex = _trimmedEndIndex;

/** Used to match leading whitespace. */
var reTrimStart = /^\s+/;

/**
 * The base implementation of `_.trim`.
 *
 * @private
 * @param {string} string The string to trim.
 * @returns {string} Returns the trimmed string.
 */
function baseTrim$1(string) {
  return string
    ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '')
    : string;
}

var _baseTrim = baseTrim$1;var root = _root;

/** Built-in value references. */
var Symbol$2 = root.Symbol;

var _Symbol = Symbol$2;var Symbol$1 = _Symbol;

/** Used for built-in method references. */
var objectProto$1 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto$1.hasOwnProperty;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString$1 = objectProto$1.toString;

/** Built-in value references. */
var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;

/**
 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the raw `toStringTag`.
 */
function getRawTag$1(value) {
  var isOwn = hasOwnProperty.call(value, symToStringTag$1),
      tag = value[symToStringTag$1];

  try {
    value[symToStringTag$1] = undefined;
    var unmasked = true;
  } catch (e) {}

  var result = nativeObjectToString$1.call(value);
  if (unmasked) {
    if (isOwn) {
      value[symToStringTag$1] = tag;
    } else {
      delete value[symToStringTag$1];
    }
  }
  return result;
}

var _getRawTag = getRawTag$1;/** Used for built-in method references. */

var objectProto = Object.prototype;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto.toString;

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString$1(value) {
  return nativeObjectToString.call(value);
}

var _objectToString = objectToString$1;var Symbol = _Symbol,
    getRawTag = _getRawTag,
    objectToString = _objectToString;

/** `Object#toString` result references. */
var nullTag = '[object Null]',
    undefinedTag = '[object Undefined]';

/** Built-in value references. */
var symToStringTag = Symbol ? Symbol.toStringTag : undefined;

/**
 * The base implementation of `getTag` without fallbacks for buggy environments.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
function baseGetTag$1(value) {
  if (value == null) {
    return value === undefined ? undefinedTag : nullTag;
  }
  return (symToStringTag && symToStringTag in Object(value))
    ? getRawTag(value)
    : objectToString(value);
}

var _baseGetTag = baseGetTag$1;/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */

function isObjectLike$1(value) {
  return value != null && typeof value == 'object';
}

var isObjectLike_1 = isObjectLike$1;var baseGetTag = _baseGetTag,
    isObjectLike = isObjectLike_1;

/** `Object#toString` result references. */
var symbolTag = '[object Symbol]';

/**
 * Checks if `value` is classified as a `Symbol` primitive or object.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
 * @example
 *
 * _.isSymbol(Symbol.iterator);
 * // => true
 *
 * _.isSymbol('abc');
 * // => false
 */
function isSymbol$1(value) {
  return typeof value == 'symbol' ||
    (isObjectLike(value) && baseGetTag(value) == symbolTag);
}

var isSymbol_1 = isSymbol$1;var baseTrim = _baseTrim,
    isObject$2 = isObject_1,
    isSymbol = isSymbol_1;

/** Used as references for various `Number` constants. */
var NAN = 0 / 0;

/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

/** Used to detect binary string values. */
var reIsBinary = /^0b[01]+$/i;

/** Used to detect octal string values. */
var reIsOctal = /^0o[0-7]+$/i;

/** Built-in method references without a dependency on `root`. */
var freeParseInt = parseInt;

/**
 * Converts `value` to a number.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to process.
 * @returns {number} Returns the number.
 * @example
 *
 * _.toNumber(3.2);
 * // => 3.2
 *
 * _.toNumber(Number.MIN_VALUE);
 * // => 5e-324
 *
 * _.toNumber(Infinity);
 * // => Infinity
 *
 * _.toNumber('3.2');
 * // => 3.2
 */
function toNumber$1(value) {
  if (typeof value == 'number') {
    return value;
  }
  if (isSymbol(value)) {
    return NAN;
  }
  if (isObject$2(value)) {
    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
    value = isObject$2(other) ? (other + '') : other;
  }
  if (typeof value != 'string') {
    return value === 0 ? value : +value;
  }
  value = baseTrim(value);
  var isBinary = reIsBinary.test(value);
  return (isBinary || reIsOctal.test(value))
    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
    : (reIsBadHex.test(value) ? NAN : +value);
}

var toNumber_1 = toNumber$1;var isObject$1 = isObject_1,
    now = now_1,
    toNumber = toNumber_1;

/** Error message constants. */
var FUNC_ERROR_TEXT$1 = 'Expected a function';

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax = Math.max,
    nativeMin = Math.min;

/**
 * Creates a debounced function that delays invoking `func` until after `wait`
 * milliseconds have elapsed since the last time the debounced function was
 * invoked. The debounced function comes with a `cancel` method to cancel
 * delayed `func` invocations and a `flush` method to immediately invoke them.
 * Provide `options` to indicate whether `func` should be invoked on the
 * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
 * with the last arguments provided to the debounced function. Subsequent
 * calls to the debounced function return the result of the last `func`
 * invocation.
 *
 * **Note:** If `leading` and `trailing` options are `true`, `func` is
 * invoked on the trailing edge of the timeout only if the debounced function
 * is invoked more than once during the `wait` timeout.
 *
 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
 *
 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
 * for details over the differences between `_.debounce` and `_.throttle`.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Function
 * @param {Function} func The function to debounce.
 * @param {number} [wait=0] The number of milliseconds to delay.
 * @param {Object} [options={}] The options object.
 * @param {boolean} [options.leading=false]
 *  Specify invoking on the leading edge of the timeout.
 * @param {number} [options.maxWait]
 *  The maximum time `func` is allowed to be delayed before it's invoked.
 * @param {boolean} [options.trailing=true]
 *  Specify invoking on the trailing edge of the timeout.
 * @returns {Function} Returns the new debounced function.
 * @example
 *
 * // Avoid costly calculations while the window size is in flux.
 * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
 *
 * // Invoke `sendMail` when clicked, debouncing subsequent calls.
 * jQuery(element).on('click', _.debounce(sendMail, 300, {
 *   'leading': true,
 *   'trailing': false
 * }));
 *
 * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
 * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
 * var source = new EventSource('/stream');
 * jQuery(source).on('message', debounced);
 *
 * // Cancel the trailing debounced invocation.
 * jQuery(window).on('popstate', debounced.cancel);
 */
function debounce$1(func, wait, options) {
  var lastArgs,
      lastThis,
      maxWait,
      result,
      timerId,
      lastCallTime,
      lastInvokeTime = 0,
      leading = false,
      maxing = false,
      trailing = true;

  if (typeof func != 'function') {
    throw new TypeError(FUNC_ERROR_TEXT$1);
  }
  wait = toNumber(wait) || 0;
  if (isObject$1(options)) {
    leading = !!options.leading;
    maxing = 'maxWait' in options;
    maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
    trailing = 'trailing' in options ? !!options.trailing : trailing;
  }

  function invokeFunc(time) {
    var args = lastArgs,
        thisArg = lastThis;

    lastArgs = lastThis = undefined;
    lastInvokeTime = time;
    result = func.apply(thisArg, args);
    return result;
  }

  function leadingEdge(time) {
    // Reset any `maxWait` timer.
    lastInvokeTime = time;
    // Start the timer for the trailing edge.
    timerId = setTimeout(timerExpired, wait);
    // Invoke the leading edge.
    return leading ? invokeFunc(time) : result;
  }

  function remainingWait(time) {
    var timeSinceLastCall = time - lastCallTime,
        timeSinceLastInvoke = time - lastInvokeTime,
        timeWaiting = wait - timeSinceLastCall;

    return maxing
      ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
      : timeWaiting;
  }

  function shouldInvoke(time) {
    var timeSinceLastCall = time - lastCallTime,
        timeSinceLastInvoke = time - lastInvokeTime;

    // Either this is the first call, activity has stopped and we're at the
    // trailing edge, the system time has gone backwards and we're treating
    // it as the trailing edge, or we've hit the `maxWait` limit.
    return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
      (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
  }

  function timerExpired() {
    var time = now();
    if (shouldInvoke(time)) {
      return trailingEdge(time);
    }
    // Restart the timer.
    timerId = setTimeout(timerExpired, remainingWait(time));
  }

  function trailingEdge(time) {
    timerId = undefined;

    // Only invoke if we have `lastArgs` which means `func` has been
    // debounced at least once.
    if (trailing && lastArgs) {
      return invokeFunc(time);
    }
    lastArgs = lastThis = undefined;
    return result;
  }

  function cancel() {
    if (timerId !== undefined) {
      clearTimeout(timerId);
    }
    lastInvokeTime = 0;
    lastArgs = lastCallTime = lastThis = timerId = undefined;
  }

  function flush() {
    return timerId === undefined ? result : trailingEdge(now());
  }

  function debounced() {
    var time = now(),
        isInvoking = shouldInvoke(time);

    lastArgs = arguments;
    lastThis = this;
    lastCallTime = time;

    if (isInvoking) {
      if (timerId === undefined) {
        return leadingEdge(lastCallTime);
      }
      if (maxing) {
        // Handle invocations in a tight loop.
        clearTimeout(timerId);
        timerId = setTimeout(timerExpired, wait);
        return invokeFunc(lastCallTime);
      }
    }
    if (timerId === undefined) {
      timerId = setTimeout(timerExpired, wait);
    }
    return result;
  }
  debounced.cancel = cancel;
  debounced.flush = flush;
  return debounced;
}

var debounce_1 = debounce$1;var debounce = debounce_1,
    isObject = isObject_1;

/** Error message constants. */
var FUNC_ERROR_TEXT = 'Expected a function';

/**
 * Creates a throttled function that only invokes `func` at most once per
 * every `wait` milliseconds. The throttled function comes with a `cancel`
 * method to cancel delayed `func` invocations and a `flush` method to
 * immediately invoke them. Provide `options` to indicate whether `func`
 * should be invoked on the leading and/or trailing edge of the `wait`
 * timeout. The `func` is invoked with the last arguments provided to the
 * throttled function. Subsequent calls to the throttled function return the
 * result of the last `func` invocation.
 *
 * **Note:** If `leading` and `trailing` options are `true`, `func` is
 * invoked on the trailing edge of the timeout only if the throttled function
 * is invoked more than once during the `wait` timeout.
 *
 * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
 * until to the next tick, similar to `setTimeout` with a timeout of `0`.
 *
 * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
 * for details over the differences between `_.throttle` and `_.debounce`.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Function
 * @param {Function} func The function to throttle.
 * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
 * @param {Object} [options={}] The options object.
 * @param {boolean} [options.leading=true]
 *  Specify invoking on the leading edge of the timeout.
 * @param {boolean} [options.trailing=true]
 *  Specify invoking on the trailing edge of the timeout.
 * @returns {Function} Returns the new throttled function.
 * @example
 *
 * // Avoid excessively updating the position while scrolling.
 * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
 *
 * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
 * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
 * jQuery(element).on('click', throttled);
 *
 * // Cancel the trailing throttled invocation.
 * jQuery(window).on('popstate', throttled.cancel);
 */
function throttle$1(func, wait, options) {
  var leading = true,
      trailing = true;

  if (typeof func != 'function') {
    throw new TypeError(FUNC_ERROR_TEXT);
  }
  if (isObject(options)) {
    leading = 'leading' in options ? !!options.leading : leading;
    trailing = 'trailing' in options ? !!options.trailing : trailing;
  }
  return debounce(func, wait, {
    'leading': leading,
    'maxWait': wait,
    'trailing': trailing
  });
}

var throttle_1 = throttle$1;var patchResizeHandler = function (resizeCallback, refreshMode, refreshRate, refreshOptions) {
    switch (refreshMode) {
        case 'debounce':
            return debounce_1(resizeCallback, refreshRate, refreshOptions);
        case 'throttle':
            return throttle_1(resizeCallback, refreshRate, refreshOptions);
        default:
            return resizeCallback;
    }
};
var isFunction = function (fn) { return typeof fn === 'function'; };
var isSSR = function () { return typeof window === 'undefined'; };
var isDOMElement = function (element) { return element instanceof Element || element instanceof HTMLDocument; };
var createNotifier = function (onResize, setSize, handleWidth, handleHeight) {
    return function (_a) {
        var width = _a.width, height = _a.height;
        setSize(function (prev) {
            if (prev.width === width && prev.height === height) {
                // skip if dimensions haven't changed
                return prev;
            }
            if ((prev.width === width && !handleHeight) || (prev.height === height && !handleWidth)) {
                // process `handleHeight/handleWidth` props
                return prev;
            }
            if (onResize && isFunction(onResize)) {
                onResize(width, height);
            }
            return { width: width, height: height };
        });
    };
};/**
 * A collection of shims that provide minimal functionality of the ES6 collections.
 *
 * These implementations are not meant to be used outside of the ResizeObserver
 * modules as they cover only a limited range of use cases.
 */
/* eslint-disable require-jsdoc, valid-jsdoc */
var MapShim = (function () {
    if (typeof Map !== 'undefined') {
        return Map;
    }
    /**
     * Returns index in provided array that matches the specified key.
     *
     * @param {Array<Array>} arr
     * @param {*} key
     * @returns {number}
     */
    function getIndex(arr, key) {
        var result = -1;
        arr.some(function (entry, index) {
            if (entry[0] === key) {
                result = index;
                return true;
            }
            return false;
        });
        return result;
    }
    return /** @class */ (function () {
        function class_1() {
            this.__entries__ = [];
        }
        Object.defineProperty(class_1.prototype, "size", {
            /**
             * @returns {boolean}
             */
            get: function () {
                return this.__entries__.length;
            },
            enumerable: true,
            configurable: true
        });
        /**
         * @param {*} key
         * @returns {*}
         */
        class_1.prototype.get = function (key) {
            var index = getIndex(this.__entries__, key);
            var entry = this.__entries__[index];
            return entry && entry[1];
        };
        /**
         * @param {*} key
         * @param {*} value
         * @returns {void}
         */
        class_1.prototype.set = function (key, value) {
            var index = getIndex(this.__entries__, key);
            if (~index) {
                this.__entries__[index][1] = value;
            }
            else {
                this.__entries__.push([key, value]);
            }
        };
        /**
         * @param {*} key
         * @returns {void}
         */
        class_1.prototype.delete = function (key) {
            var entries = this.__entries__;
            var index = getIndex(entries, key);
            if (~index) {
                entries.splice(index, 1);
            }
        };
        /**
         * @param {*} key
         * @returns {void}
         */
        class_1.prototype.has = function (key) {
            return !!~getIndex(this.__entries__, key);
        };
        /**
         * @returns {void}
         */
        class_1.prototype.clear = function () {
            this.__entries__.splice(0);
        };
        /**
         * @param {Function} callback
         * @param {*} [ctx=null]
         * @returns {void}
         */
        class_1.prototype.forEach = function (callback, ctx) {
            if (ctx === void 0) { ctx = null; }
            for (var _i = 0, _a = this.__entries__; _i < _a.length; _i++) {
                var entry = _a[_i];
                callback.call(ctx, entry[1], entry[0]);
            }
        };
        return class_1;
    }());
})();

/**
 * Detects whether window and document objects are available in current environment.
 */
var isBrowser = typeof window !== 'undefined' && typeof document !== 'undefined' && window.document === document;

// Returns global object of a current environment.
var global$1 = (function () {
    if (typeof global !== 'undefined' && global.Math === Math) {
        return global;
    }
    if (typeof self !== 'undefined' && self.Math === Math) {
        return self;
    }
    if (typeof window !== 'undefined' && window.Math === Math) {
        return window;
    }
    // eslint-disable-next-line no-new-func
    return Function('return this')();
})();

/**
 * A shim for the requestAnimationFrame which falls back to the setTimeout if
 * first one is not supported.
 *
 * @returns {number} Requests' identifier.
 */
var requestAnimationFrame$1 = (function () {
    if (typeof requestAnimationFrame === 'function') {
        // It's required to use a bounded function because IE sometimes throws
        // an "Invalid calling object" error if rAF is invoked without the global
        // object on the left hand side.
        return requestAnimationFrame.bind(global$1);
    }
    return function (callback) { return setTimeout(function () { return callback(Date.now()); }, 1000 / 60); };
})();

// Defines minimum timeout before adding a trailing call.
var trailingTimeout = 2;
/**
 * Creates a wrapper function which ensures that provided callback will be
 * invoked only once during the specified delay period.
 *
 * @param {Function} callback - Function to be invoked after the delay period.
 * @param {number} delay - Delay after which to invoke callback.
 * @returns {Function}
 */
function throttle (callback, delay) {
    var leadingCall = false, trailingCall = false, lastCallTime = 0;
    /**
     * Invokes the original callback function and schedules new invocation if
     * the "proxy" was called during current request.
     *
     * @returns {void}
     */
    function resolvePending() {
        if (leadingCall) {
            leadingCall = false;
            callback();
        }
        if (trailingCall) {
            proxy();
        }
    }
    /**
     * Callback invoked after the specified delay. It will further postpone
     * invocation of the original function delegating it to the
     * requestAnimationFrame.
     *
     * @returns {void}
     */
    function timeoutCallback() {
        requestAnimationFrame$1(resolvePending);
    }
    /**
     * Schedules invocation of the original function.
     *
     * @returns {void}
     */
    function proxy() {
        var timeStamp = Date.now();
        if (leadingCall) {
            // Reject immediately following calls.
            if (timeStamp - lastCallTime < trailingTimeout) {
                return;
            }
            // Schedule new call to be in invoked when the pending one is resolved.
            // This is important for "transitions" which never actually start
            // immediately so there is a chance that we might miss one if change
            // happens amids the pending invocation.
            trailingCall = true;
        }
        else {
            leadingCall = true;
            trailingCall = false;
            setTimeout(timeoutCallback, delay);
        }
        lastCallTime = timeStamp;
    }
    return proxy;
}

// Minimum delay before invoking the update of observers.
var REFRESH_DELAY = 20;
// A list of substrings of CSS properties used to find transition events that
// might affect dimensions of observed elements.
var transitionKeys = ['top', 'right', 'bottom', 'left', 'width', 'height', 'size', 'weight'];
// Check if MutationObserver is available.
var mutationObserverSupported = typeof MutationObserver !== 'undefined';
/**
 * Singleton controller class which handles updates of ResizeObserver instances.
 */
var ResizeObserverController = /** @class */ (function () {
    /**
     * Creates a new instance of ResizeObserverController.
     *
     * @private
     */
    function ResizeObserverController() {
        /**
         * Indicates whether DOM listeners have been added.
         *
         * @private {boolean}
         */
        this.connected_ = false;
        /**
         * Tells that controller has subscribed for Mutation Events.
         *
         * @private {boolean}
         */
        this.mutationEventsAdded_ = false;
        /**
         * Keeps reference to the instance of MutationObserver.
         *
         * @private {MutationObserver}
         */
        this.mutationsObserver_ = null;
        /**
         * A list of connected observers.
         *
         * @private {Array<ResizeObserverSPI>}
         */
        this.observers_ = [];
        this.onTransitionEnd_ = this.onTransitionEnd_.bind(this);
        this.refresh = throttle(this.refresh.bind(this), REFRESH_DELAY);
    }
    /**
     * Adds observer to observers list.
     *
     * @param {ResizeObserverSPI} observer - Observer to be added.
     * @returns {void}
     */
    ResizeObserverController.prototype.addObserver = function (observer) {
        if (!~this.observers_.indexOf(observer)) {
            this.observers_.push(observer);
        }
        // Add listeners if they haven't been added yet.
        if (!this.connected_) {
            this.connect_();
        }
    };
    /**
     * Removes observer from observers list.
     *
     * @param {ResizeObserverSPI} observer - Observer to be removed.
     * @returns {void}
     */
    ResizeObserverController.prototype.removeObserver = function (observer) {
        var observers = this.observers_;
        var index = observers.indexOf(observer);
        // Remove observer if it's present in registry.
        if (~index) {
            observers.splice(index, 1);
        }
        // Remove listeners if controller has no connected observers.
        if (!observers.length && this.connected_) {
            this.disconnect_();
        }
    };
    /**
     * Invokes the update of observers. It will continue running updates insofar
     * it detects changes.
     *
     * @returns {void}
     */
    ResizeObserverController.prototype.refresh = function () {
        var changesDetected = this.updateObservers_();
        // Continue running updates if changes have been detected as there might
        // be future ones caused by CSS transitions.
        if (changesDetected) {
            this.refresh();
        }
    };
    /**
     * Updates every observer from observers list and notifies them of queued
     * entries.
     *
     * @private
     * @returns {boolean} Returns "true" if any observer has detected changes in
     *      dimensions of it's elements.
     */
    ResizeObserverController.prototype.updateObservers_ = function () {
        // Collect observers that have active observations.
        var activeObservers = this.observers_.filter(function (observer) {
            return observer.gatherActive(), observer.hasActive();
        });
        // Deliver notifications in a separate cycle in order to avoid any
        // collisions between observers, e.g. when multiple instances of
        // ResizeObserver are tracking the same element and the callback of one
        // of them changes content dimensions of the observed target. Sometimes
        // this may result in notifications being blocked for the rest of observers.
        activeObservers.forEach(function (observer) { return observer.broadcastActive(); });
        return activeObservers.length > 0;
    };
    /**
     * Initializes DOM listeners.
     *
     * @private
     * @returns {void}
     */
    ResizeObserverController.prototype.connect_ = function () {
        // Do nothing if running in a non-browser environment or if listeners
        // have been already added.
        if (!isBrowser || this.connected_) {
            return;
        }
        // Subscription to the "Transitionend" event is used as a workaround for
        // delayed transitions. This way it's possible to capture at least the
        // final state of an element.
        document.addEventListener('transitionend', this.onTransitionEnd_);
        window.addEventListener('resize', this.refresh);
        if (mutationObserverSupported) {
            this.mutationsObserver_ = new MutationObserver(this.refresh);
            this.mutationsObserver_.observe(document, {
                attributes: true,
                childList: true,
                characterData: true,
                subtree: true
            });
        }
        else {
            document.addEventListener('DOMSubtreeModified', this.refresh);
            this.mutationEventsAdded_ = true;
        }
        this.connected_ = true;
    };
    /**
     * Removes DOM listeners.
     *
     * @private
     * @returns {void}
     */
    ResizeObserverController.prototype.disconnect_ = function () {
        // Do nothing if running in a non-browser environment or if listeners
        // have been already removed.
        if (!isBrowser || !this.connected_) {
            return;
        }
        document.removeEventListener('transitionend', this.onTransitionEnd_);
        window.removeEventListener('resize', this.refresh);
        if (this.mutationsObserver_) {
            this.mutationsObserver_.disconnect();
        }
        if (this.mutationEventsAdded_) {
            document.removeEventListener('DOMSubtreeModified', this.refresh);
        }
        this.mutationsObserver_ = null;
        this.mutationEventsAdded_ = false;
        this.connected_ = false;
    };
    /**
     * "Transitionend" event handler.
     *
     * @private
     * @param {TransitionEvent} event
     * @returns {void}
     */
    ResizeObserverController.prototype.onTransitionEnd_ = function (_a) {
        var _b = _a.propertyName, propertyName = _b === void 0 ? '' : _b;
        // Detect whether transition may affect dimensions of an element.
        var isReflowProperty = transitionKeys.some(function (key) {
            return !!~propertyName.indexOf(key);
        });
        if (isReflowProperty) {
            this.refresh();
        }
    };
    /**
     * Returns instance of the ResizeObserverController.
     *
     * @returns {ResizeObserverController}
     */
    ResizeObserverController.getInstance = function () {
        if (!this.instance_) {
            this.instance_ = new ResizeObserverController();
        }
        return this.instance_;
    };
    /**
     * Holds reference to the controller's instance.
     *
     * @private {ResizeObserverController}
     */
    ResizeObserverController.instance_ = null;
    return ResizeObserverController;
}());

/**
 * Defines non-writable/enumerable properties of the provided target object.
 *
 * @param {Object} target - Object for which to define properties.
 * @param {Object} props - Properties to be defined.
 * @returns {Object} Target object.
 */
var defineConfigurable = (function (target, props) {
    for (var _i = 0, _a = Object.keys(props); _i < _a.length; _i++) {
        var key = _a[_i];
        Object.defineProperty(target, key, {
            value: props[key],
            enumerable: false,
            writable: false,
            configurable: true
        });
    }
    return target;
});

/**
 * Returns the global object associated with provided element.
 *
 * @param {Object} target
 * @returns {Object}
 */
var getWindowOf = (function (target) {
    // Assume that the element is an instance of Node, which means that it
    // has the "ownerDocument" property from which we can retrieve a
    // corresponding global object.
    var ownerGlobal = target && target.ownerDocument && target.ownerDocument.defaultView;
    // Return the local global object if it's not possible extract one from
    // provided element.
    return ownerGlobal || global$1;
});

// Placeholder of an empty content rectangle.
var emptyRect = createRectInit(0, 0, 0, 0);
/**
 * Converts provided string to a number.
 *
 * @param {number|string} value
 * @returns {number}
 */
function toFloat(value) {
    return parseFloat(value) || 0;
}
/**
 * Extracts borders size from provided styles.
 *
 * @param {CSSStyleDeclaration} styles
 * @param {...string} positions - Borders positions (top, right, ...)
 * @returns {number}
 */
function getBordersSize(styles) {
    var positions = [];
    for (var _i = 1; _i < arguments.length; _i++) {
        positions[_i - 1] = arguments[_i];
    }
    return positions.reduce(function (size, position) {
        var value = styles['border-' + position + '-width'];
        return size + toFloat(value);
    }, 0);
}
/**
 * Extracts paddings sizes from provided styles.
 *
 * @param {CSSStyleDeclaration} styles
 * @returns {Object} Paddings box.
 */
function getPaddings(styles) {
    var positions = ['top', 'right', 'bottom', 'left'];
    var paddings = {};
    for (var _i = 0, positions_1 = positions; _i < positions_1.length; _i++) {
        var position = positions_1[_i];
        var value = styles['padding-' + position];
        paddings[position] = toFloat(value);
    }
    return paddings;
}
/**
 * Calculates content rectangle of provided SVG element.
 *
 * @param {SVGGraphicsElement} target - Element content rectangle of which needs
 *      to be calculated.
 * @returns {DOMRectInit}
 */
function getSVGContentRect(target) {
    var bbox = target.getBBox();
    return createRectInit(0, 0, bbox.width, bbox.height);
}
/**
 * Calculates content rectangle of provided HTMLElement.
 *
 * @param {HTMLElement} target - Element for which to calculate the content rectangle.
 * @returns {DOMRectInit}
 */
function getHTMLElementContentRect(target) {
    // Client width & height properties can't be
    // used exclusively as they provide rounded values.
    var clientWidth = target.clientWidth, clientHeight = target.clientHeight;
    // By this condition we can catch all non-replaced inline, hidden and
    // detached elements. Though elements with width & height properties less
    // than 0.5 will be discarded as well.
    //
    // Without it we would need to implement separate methods for each of
    // those cases and it's not possible to perform a precise and performance
    // effective test for hidden elements. E.g. even jQuery's ':visible' filter
    // gives wrong results for elements with width & height less than 0.5.
    if (!clientWidth && !clientHeight) {
        return emptyRect;
    }
    var styles = getWindowOf(target).getComputedStyle(target);
    var paddings = getPaddings(styles);
    var horizPad = paddings.left + paddings.right;
    var vertPad = paddings.top + paddings.bottom;
    // Computed styles of width & height are being used because they are the
    // only dimensions available to JS that contain non-rounded values. It could
    // be possible to utilize the getBoundingClientRect if only it's data wasn't
    // affected by CSS transformations let alone paddings, borders and scroll bars.
    var width = toFloat(styles.width), height = toFloat(styles.height);
    // Width & height include paddings and borders when the 'border-box' box
    // model is applied (except for IE).
    if (styles.boxSizing === 'border-box') {
        // Following conditions are required to handle Internet Explorer which
        // doesn't include paddings and borders to computed CSS dimensions.
        //
        // We can say that if CSS dimensions + paddings are equal to the "client"
        // properties then it's either IE, and thus we don't need to subtract
        // anything, or an element merely doesn't have paddings/borders styles.
        if (Math.round(width + horizPad) !== clientWidth) {
            width -= getBordersSize(styles, 'left', 'right') + horizPad;
        }
        if (Math.round(height + vertPad) !== clientHeight) {
            height -= getBordersSize(styles, 'top', 'bottom') + vertPad;
        }
    }
    // Following steps can't be applied to the document's root element as its
    // client[Width/Height] properties represent viewport area of the window.
    // Besides, it's as well not necessary as the <html> itself neither has
    // rendered scroll bars nor it can be clipped.
    if (!isDocumentElement(target)) {
        // In some browsers (only in Firefox, actually) CSS width & height
        // include scroll bars size which can be removed at this step as scroll
        // bars are the only difference between rounded dimensions + paddings
        // and "client" properties, though that is not always true in Chrome.
        var vertScrollbar = Math.round(width + horizPad) - clientWidth;
        var horizScrollbar = Math.round(height + vertPad) - clientHeight;
        // Chrome has a rather weird rounding of "client" properties.
        // E.g. for an element with content width of 314.2px it sometimes gives
        // the client width of 315px and for the width of 314.7px it may give
        // 314px. And it doesn't happen all the time. So just ignore this delta
        // as a non-relevant.
        if (Math.abs(vertScrollbar) !== 1) {
            width -= vertScrollbar;
        }
        if (Math.abs(horizScrollbar) !== 1) {
            height -= horizScrollbar;
        }
    }
    return createRectInit(paddings.left, paddings.top, width, height);
}
/**
 * Checks whether provided element is an instance of the SVGGraphicsElement.
 *
 * @param {Element} target - Element to be checked.
 * @returns {boolean}
 */
var isSVGGraphicsElement = (function () {
    // Some browsers, namely IE and Edge, don't have the SVGGraphicsElement
    // interface.
    if (typeof SVGGraphicsElement !== 'undefined') {
        return function (target) { return target instanceof getWindowOf(target).SVGGraphicsElement; };
    }
    // If it's so, then check that element is at least an instance of the
    // SVGElement and that it has the "getBBox" method.
    // eslint-disable-next-line no-extra-parens
    return function (target) { return (target instanceof getWindowOf(target).SVGElement &&
        typeof target.getBBox === 'function'); };
})();
/**
 * Checks whether provided element is a document element (<html>).
 *
 * @param {Element} target - Element to be checked.
 * @returns {boolean}
 */
function isDocumentElement(target) {
    return target === getWindowOf(target).document.documentElement;
}
/**
 * Calculates an appropriate content rectangle for provided html or svg element.
 *
 * @param {Element} target - Element content rectangle of which needs to be calculated.
 * @returns {DOMRectInit}
 */
function getContentRect(target) {
    if (!isBrowser) {
        return emptyRect;
    }
    if (isSVGGraphicsElement(target)) {
        return getSVGContentRect(target);
    }
    return getHTMLElementContentRect(target);
}
/**
 * Creates rectangle with an interface of the DOMRectReadOnly.
 * Spec: https://drafts.fxtf.org/geometry/#domrectreadonly
 *
 * @param {DOMRectInit} rectInit - Object with rectangle's x/y coordinates and dimensions.
 * @returns {DOMRectReadOnly}
 */
function createReadOnlyRect(_a) {
    var x = _a.x, y = _a.y, width = _a.width, height = _a.height;
    // If DOMRectReadOnly is available use it as a prototype for the rectangle.
    var Constr = typeof DOMRectReadOnly !== 'undefined' ? DOMRectReadOnly : Object;
    var rect = Object.create(Constr.prototype);
    // Rectangle's properties are not writable and non-enumerable.
    defineConfigurable(rect, {
        x: x, y: y, width: width, height: height,
        top: y,
        right: x + width,
        bottom: height + y,
        left: x
    });
    return rect;
}
/**
 * Creates DOMRectInit object based on the provided dimensions and the x/y coordinates.
 * Spec: https://drafts.fxtf.org/geometry/#dictdef-domrectinit
 *
 * @param {number} x - X coordinate.
 * @param {number} y - Y coordinate.
 * @param {number} width - Rectangle's width.
 * @param {number} height - Rectangle's height.
 * @returns {DOMRectInit}
 */
function createRectInit(x, y, width, height) {
    return { x: x, y: y, width: width, height: height };
}

/**
 * Class that is responsible for computations of the content rectangle of
 * provided DOM element and for keeping track of it's changes.
 */
var ResizeObservation = /** @class */ (function () {
    /**
     * Creates an instance of ResizeObservation.
     *
     * @param {Element} target - Element to be observed.
     */
    function ResizeObservation(target) {
        /**
         * Broadcasted width of content rectangle.
         *
         * @type {number}
         */
        this.broadcastWidth = 0;
        /**
         * Broadcasted height of content rectangle.
         *
         * @type {number}
         */
        this.broadcastHeight = 0;
        /**
         * Reference to the last observed content rectangle.
         *
         * @private {DOMRectInit}
         */
        this.contentRect_ = createRectInit(0, 0, 0, 0);
        this.target = target;
    }
    /**
     * Updates content rectangle and tells whether it's width or height properties
     * have changed since the last broadcast.
     *
     * @returns {boolean}
     */
    ResizeObservation.prototype.isActive = function () {
        var rect = getContentRect(this.target);
        this.contentRect_ = rect;
        return (rect.width !== this.broadcastWidth ||
            rect.height !== this.broadcastHeight);
    };
    /**
     * Updates 'broadcastWidth' and 'broadcastHeight' properties with a data
     * from the corresponding properties of the last observed content rectangle.
     *
     * @returns {DOMRectInit} Last observed content rectangle.
     */
    ResizeObservation.prototype.broadcastRect = function () {
        var rect = this.contentRect_;
        this.broadcastWidth = rect.width;
        this.broadcastHeight = rect.height;
        return rect;
    };
    return ResizeObservation;
}());

var ResizeObserverEntry = /** @class */ (function () {
    /**
     * Creates an instance of ResizeObserverEntry.
     *
     * @param {Element} target - Element that is being observed.
     * @param {DOMRectInit} rectInit - Data of the element's content rectangle.
     */
    function ResizeObserverEntry(target, rectInit) {
        var contentRect = createReadOnlyRect(rectInit);
        // According to the specification following properties are not writable
        // and are also not enumerable in the native implementation.
        //
        // Property accessors are not being used as they'd require to define a
        // private WeakMap storage which may cause memory leaks in browsers that
        // don't support this type of collections.
        defineConfigurable(this, { target: target, contentRect: contentRect });
    }
    return ResizeObserverEntry;
}());

var ResizeObserverSPI = /** @class */ (function () {
    /**
     * Creates a new instance of ResizeObserver.
     *
     * @param {ResizeObserverCallback} callback - Callback function that is invoked
     *      when one of the observed elements changes it's content dimensions.
     * @param {ResizeObserverController} controller - Controller instance which
     *      is responsible for the updates of observer.
     * @param {ResizeObserver} callbackCtx - Reference to the public
     *      ResizeObserver instance which will be passed to callback function.
     */
    function ResizeObserverSPI(callback, controller, callbackCtx) {
        /**
         * Collection of resize observations that have detected changes in dimensions
         * of elements.
         *
         * @private {Array<ResizeObservation>}
         */
        this.activeObservations_ = [];
        /**
         * Registry of the ResizeObservation instances.
         *
         * @private {Map<Element, ResizeObservation>}
         */
        this.observations_ = new MapShim();
        if (typeof callback !== 'function') {
            throw new TypeError('The callback provided as parameter 1 is not a function.');
        }
        this.callback_ = callback;
        this.controller_ = controller;
        this.callbackCtx_ = callbackCtx;
    }
    /**
     * Starts observing provided element.
     *
     * @param {Element} target - Element to be observed.
     * @returns {void}
     */
    ResizeObserverSPI.prototype.observe = function (target) {
        if (!arguments.length) {
            throw new TypeError('1 argument required, but only 0 present.');
        }
        // Do nothing if current environment doesn't have the Element interface.
        if (typeof Element === 'undefined' || !(Element instanceof Object)) {
            return;
        }
        if (!(target instanceof getWindowOf(target).Element)) {
            throw new TypeError('parameter 1 is not of type "Element".');
        }
        var observations = this.observations_;
        // Do nothing if element is already being observed.
        if (observations.has(target)) {
            return;
        }
        observations.set(target, new ResizeObservation(target));
        this.controller_.addObserver(this);
        // Force the update of observations.
        this.controller_.refresh();
    };
    /**
     * Stops observing provided element.
     *
     * @param {Element} target - Element to stop observing.
     * @returns {void}