source code: ./othercms/elxis_5.3_atlas_rev2452/includes/js/simplebar/simplebar.js

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./othercms/elxis_5.3_atlas_rev2452/includes/js/simplebar/simplebar.js

/**
* SimpleBar.js - v3.1.3
* Scrollbars, simpler.
* https://grsmto.github.io/simplebar/
*
* Made by Adrien Denat from a fork by Jonathan Nicol
* Under MIT License
*/

(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.SimpleBar = factory());
}(this, function () { 'use strict';

var _isObject = function (it) {
return typeof it === 'object' ? it !== null : typeof it === 'function';
};

var _anObject = function (it) {
if (!_isObject(it)) throw TypeError(it + ' is not an object!');
return it;
};

// 7.2.1 RequireObjectCoercible(argument)
var _defined = function (it) {
if (it == undefined) throw TypeError("Can't call method on " + it);
return it;
};

// 7.1.13 ToObject(argument)

var _toObject = function (it) {
return Object(_defined(it));
};

// 7.1.4 ToInteger
var ceil = Math.ceil;
var floor = Math.floor;
var _toInteger = function (it) {
return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
};

// 7.1.15 ToLength

var min = Math.min;
var _toLength = function (it) {
return it > 0 ? min(_toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991
};

// true -> String#at
// false -> String#codePointAt
var _stringAt = function (TO_STRING) {
return function (that, pos) {
var s = String(_defined(that));
var i = _toInteger(pos);
var l = s.length;
var a, b;
if (i < 0 || i >= l) return TO_STRING ? '' : undefined;
a = s.charCodeAt(i);
return a < 0xd800 || a > 0xdbff || i + 1 === l || (b = s.charCodeAt(i + 1)) < 0xdc00 || b > 0xdfff
? TO_STRING ? s.charAt(i) : a
: TO_STRING ? s.slice(i, i + 2) : (a - 0xd800 << 10) + (b - 0xdc00) + 0x10000;
};
};

var at = _stringAt(true);

// `AdvanceStringIndex` abstract operation
// https://tc39.github.io/ecma262/#sec-advancestringindex
var _advanceStringIndex = function (S, index, unicode) {
return index + (unicode ? at(S, index).length : 1);
};

var toString = {}.toString;

var _cof = function (it) {
return toString.call(it).slice(8, -1);
};

var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function createCommonjsModule(fn, module) {
return module = { exports: {} }, fn(module, module.exports), module.exports;
}

var _core = createCommonjsModule(function (module) {
var core = module.exports = { version: '2.6.2' };
if (typeof __e == 'number') __e = core; // eslint-disable-line no-undef
});
var _core_1 = _core.version;

var _global = createCommonjsModule(function (module) {
// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
var global = module.exports = typeof window != 'undefined' && window.Math == Math
? window : typeof self != 'undefined' && self.Math == Math ? self
// eslint-disable-next-line no-new-func
: Function('return this')();
if (typeof __g == 'number') __g = global; // eslint-disable-line no-undef
});

var _library = false;

var _shared = createCommonjsModule(function (module) {
var SHARED = '__core-js_shared__';
var store = _global[SHARED] || (_global[SHARED] = {});

(module.exports = function (key, value) {
return store[key] || (store[key] = value !== undefined ? value : {});
})('versions', []).push({
version: _core.version,
mode: _library ? 'pure' : 'global',
copyright: '© 2019 Denis Pushkarev (zloirock.ru)'
});
});

var id = 0;
var px = Math.random();
var _uid = function (key) {
return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
};

var _wks = createCommonjsModule(function (module) {
var store = _shared('wks');

var Symbol = _global.Symbol;
var USE_SYMBOL = typeof Symbol == 'function';

var $exports = module.exports = function (name) {
return store[name] || (store[name] =
USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : _uid)('Symbol.' + name));
};

$exports.store = store;
});

// getting tag from 19.1.3.6 Object.prototype.toString()

var TAG = _wks('toStringTag');
// ES3 wrong here
var ARG = _cof(function () { return arguments; }()) == 'Arguments';

// fallback for IE11 Script Access Denied error
var tryGet = function (it, key) {
try {
return it[key];
} catch (e) { /* empty */ }
};

var _classof = function (it) {
var O, T, B;
return it === undefined ? 'Undefined' : it === null ? 'Null'
// @@toStringTag case
: typeof (T = tryGet(O = Object(it), TAG)) == 'string' ? T
// builtinTag case
: ARG ? _cof(O)
// ES3 arguments fallback
: (B = _cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
};

var builtinExec = RegExp.prototype.exec;

// `RegExpExec` abstract operation
// https://tc39.github.io/ecma262/#sec-regexpexec
var _regexpExecAbstract = function (R, S) {
var exec = R.exec;
if (typeof exec === 'function') {
var result = exec.call(R, S);
if (typeof result !== 'object') {
throw new TypeError('RegExp exec method returned something other than an Object or null');
}
return result;
}
if (_classof(R) !== 'RegExp') {
throw new TypeError('RegExp#exec called on incompatible receiver');
}
return builtinExec.call(R, S);
};

// 21.2.5.3 get RegExp.prototype.flags

var _flags = function () {
var that = _anObject(this);
var result = '';
if (that.global) result += 'g';
if (that.ignoreCase) result += 'i';
if (that.multiline) result += 'm';
if (that.unicode) result += 'u';
if (that.sticky) result += 'y';
return result;
};

var nativeExec = RegExp.prototype.exec;
// This always refers to the native implementation, because the
// String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,
// which loads this file before patching the method.
var nativeReplace = String.prototype.replace;

var patchedExec = nativeExec;

var LAST_INDEX = 'lastIndex';

var UPDATES_LAST_INDEX_WRONG = (function () {
var re1 = /a/,
re2 = /b*/g;
nativeExec.call(re1, 'a');
nativeExec.call(re2, 'a');
return re1[LAST_INDEX] !== 0 || re2[LAST_INDEX] !== 0;
})();

// nonparticipating capturing group, copied from es5-shim's String#split patch.
var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;

var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED;

if (PATCH) {
patchedExec = function exec(str) {
var re = this;
var lastIndex, reCopy, match, i;

if (NPCG_INCLUDED) {
reCopy = new RegExp('^' + re.source + '$(?!\\s)', _flags.call(re));
}
if (UPDATES_LAST_INDEX_WRONG) lastIndex = re[LAST_INDEX];

match = nativeExec.call(re, str);

if (UPDATES_LAST_INDEX_WRONG && match) {
re[LAST_INDEX] = re.global ? match.index + match[0].length : lastIndex;
}
if (NPCG_INCLUDED && match && match.length > 1) {
// Fix browsers whose `exec` methods don't consistently return `undefined`
// for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
// eslint-disable-next-line no-loop-func
nativeReplace.call(match[0], reCopy, function () {
for (i = 1; i < arguments.length - 2; i++) {
if (arguments[i] === undefined) match[i] = undefined;
}
});
}

return match;
};
}

var _regexpExec = patchedExec;

var _fails = function (exec) {
try {
return !!exec();
} catch (e) {
return true;
}
};

// Thank's IE8 for his funny defineProperty
var _descriptors = !_fails(function () {
return Object.defineProperty({}, 'a', { get: function () { return 7; } }).a != 7;
});

var document$1 = _global.document;
// typeof document.createElement is 'object' in old IE
var is = _isObject(document$1) && _isObject(document$1.createElement);
var _domCreate = function (it) {
return is ? document$1.createElement(it) : {};
};

var _ie8DomDefine = !_descriptors && !_fails(function () {
return Object.defineProperty(_domCreate('div'), 'a', { get: function () { return 7; } }).a != 7;
});

// 7.1.1 ToPrimitive(input [, PreferredType])

// instead of the ES6 spec version, we didn't implement @@toPrimitive case
// and the second argument - flag - preferred type is a string
var _toPrimitive = function (it, S) {
if (!_isObject(it)) return it;
var fn, val;
if (S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
if (typeof (fn = it.valueOf) == 'function' && !_isObject(val = fn.call(it))) return val;
if (!S && typeof (fn = it.toString) == 'function' && !_isObject(val = fn.call(it))) return val;
throw TypeError("Can't convert object to primitive value");
};

var dP = Object.defineProperty;

var f = _descriptors ? Object.defineProperty : function defineProperty(O, P, Attributes) {
_anObject(O);
P = _toPrimitive(P, true);
_anObject(Attributes);
if (_ie8DomDefine) try {
return dP(O, P, Attributes);
} catch (e) { /* empty */ }
if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported!');
if ('value' in Attributes) O[P] = Attributes.value;
return O;
};

var _objectDp = {
f: f
};

var _propertyDesc = function (bitmap, value) {
return {
enumerable: !(bitmap & 1),
configurable: !(bitmap & 2),
writable: !(bitmap & 4),
value: value
};
};

var _hide = _descriptors ? function (object, key, value) {
return _objectDp.f(object, key, _propertyDesc(1, value));
} : function (object, key, value) {
object[key] = value;
return object;
};

var hasOwnProperty = {}.hasOwnProperty;
var _has = function (it, key) {
return hasOwnProperty.call(it, key);
};

var _redefine = createCommonjsModule(function (module) {
var SRC = _uid('src');
var TO_STRING = 'toString';
var $toString = Function[TO_STRING];
var TPL = ('' + $toString).split(TO_STRING);

_core.inspectSource = function (it) {
return $toString.call(it);
};

(module.exports = function (O, key, val, safe) {
var isFunction = typeof val == 'function';
if (isFunction) _has(val, 'name') || _hide(val, 'name', key);
if (O[key] === val) return;
if (isFunction) _has(val, SRC) || _hide(val, SRC, O[key] ? '' + O[key] : TPL.join(String(key)));
if (O === _global) {
O[key] = val;
} else if (!safe) {
delete O[key];
_hide(O, key, val);
} else if (O[key]) {
O[key] = val;
} else {
_hide(O, key, val);
}
// add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
})(Function.prototype, TO_STRING, function toString() {
return typeof this == 'function' && this[SRC] || $toString.call(this);
});
});

var _aFunction = function (it) {
if (typeof it != 'function') throw TypeError(it + ' is not a function!');
return it;
};

// optional / simple context binding

var _ctx = function (fn, that, length) {
_aFunction(fn);
if (that === undefined) return fn;
switch (length) {
case 1: return function (a) {
return fn.call(that, a);
};
case 2: return function (a, b) {
return fn.call(that, a, b);
};
case 3: return function (a, b, c) {
return fn.call(that, a, b, c);
};
}
return function (/* ...args */) {
return fn.apply(that, arguments);
};
};

var PROTOTYPE = 'prototype';

var $export = function (type, name, source) {
var IS_FORCED = type & $export.F;
var IS_GLOBAL = type & $export.G;
var IS_STATIC = type & $export.S;
var IS_PROTO = type & $export.P;
var IS_BIND = type & $export.B;
var target = IS_GLOBAL ? _global : IS_STATIC ? _global[name] || (_global[name] = {}) : (_global[name] || {})[PROTOTYPE];
var exports = IS_GLOBAL ? _core : _core[name] || (_core[name] = {});
var expProto = exports[PROTOTYPE] || (exports[PROTOTYPE] = {});
var key, own, out, exp;
if (IS_GLOBAL) source = name;
for (key in source) {
// contains in native
own = !IS_FORCED && target && target[key] !== undefined;
// export native or passed
out = (own ? target : source)[key];
// bind timers to global for call from export context
exp = IS_BIND && own ? _ctx(out, _global) : IS_PROTO && typeof out == 'function' ? _ctx(Function.call, out) : out;
// extend global
if (target) _redefine(target, key, out, type & $export.U);
// export
if (exports[key] != out) _hide(exports, key, exp);
if (IS_PROTO && expProto[key] != out) expProto[key] = out;
}
};
_global.core = _core;
// type bitmap
$export.F = 1; // forced
$export.G = 2; // global
$export.S = 4; // static
$export.P = 8; // proto
$export.B = 16; // bind
$export.W = 32; // wrap
$export.U = 64; // safe
$export.R = 128; // real proto method for `library`
var _export = $export;

_export({
target: 'RegExp',
proto: true,
forced: _regexpExec !== /./.exec
}, {
exec: _regexpExec
});

var SPECIES = _wks('species');

var REPLACE_SUPPORTS_NAMED_GROUPS = !_fails(function () {
// #replace needs built-in support for named groups.
// #match works fine because it just return the exec results, even if it has
// a "grops" property.
var re = /./;
re.exec = function () {
var result = [];
result.groups = { a: '7' };
return result;
};
return ''.replace(re, '$<a>') !== '7';
});

var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = (function () {
// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
var re = /(?:)/;
var originalExec = re.exec;
re.exec = function () { return originalExec.apply(this, arguments); };
var result = 'ab'.split(re);
return result.length === 2 && result[0] === 'a' && result[1] === 'b';
})();

var _fixReWks = function (KEY, length, exec) {
var SYMBOL = _wks(KEY);

var DELEGATES_TO_SYMBOL = !_fails(function () {
// String methods call symbol-named RegEp methods
var O = {};
O[SYMBOL] = function () { return 7; };
return ''[KEY](O) != 7;
});

var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL ? !_fails(function () {
// Symbol-named RegExp methods call .exec
var execCalled = false;
var re = /a/;
re.exec = function () { execCalled = true; return null; };
if (KEY === 'split') {
// RegExp[@@split] doesn't call the regex's exec method, but first creates
// a new one. We need to return the patched regex when creating the new one.
re.constructor = {};
re.constructor[SPECIES] = function () { return re; };
}
re[SYMBOL]('');
return !execCalled;
}) : undefined;

if (
!DELEGATES_TO_SYMBOL ||
!DELEGATES_TO_EXEC ||
(KEY === 'replace' && !REPLACE_SUPPORTS_NAMED_GROUPS) ||
(KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)
) {
var nativeRegExpMethod = /./[SYMBOL];
var fns = exec(
_defined,
SYMBOL,
''[KEY],
function maybeCallNative(nativeMethod, regexp, str, arg2, forceStringMethod) {
if (regexp.exec === _regexpExec) {
if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
// The native String method already delegates to @@method (this
// polyfilled function), leasing to infinite recursion.
// We avoid it by directly calling the native @@method method.
return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
}
return { done: true, value: nativeMethod.call(str, regexp, arg2) };
}
return { done: false };
}
);
var strfn = fns[0];
var rxfn = fns[1];

_redefine(String.prototype, KEY, strfn);
_hide(RegExp.prototype, SYMBOL, length == 2
// 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
// 21.2.5.11 RegExp.prototype[@@split](string, limit)
? function (string, arg) { return rxfn.call(string, this, arg); }
// 21.2.5.6 RegExp.prototype[@@match](string)
// 21.2.5.9 RegExp.prototype[@@search](string)
: function (string) { return rxfn.call(string, this); }
);
}
};

var max = Math.max;
var min$1 = Math.min;
var floor$1 = Math.floor;
var SUBSTITUTION_SYMBOLS = /\$([$&`']|\d\d?|<[^>]*>)/g;
var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&`']|\d\d?)/g;

var maybeToString = function (it) {
return it === undefined ? it : String(it);
};

// @@replace logic
_fixReWks('replace', 2, function (defined, REPLACE, $replace, maybeCallNative) {
return [
// `String.prototype.replace` method
// https://tc39.github.io/ecma262/#sec-string.prototype.replace
function replace(searchValue, replaceValue) {
var O = defined(this);
var fn = searchValue == undefined ? undefined : searchValue[REPLACE];
return fn !== undefined
? fn.call(searchValue, O, replaceValue)
: $replace.call(String(O), searchValue, replaceValue);
},
// `RegExp.prototype[@@replace]` method
// https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
function (regexp, replaceValue) {
var res = maybeCallNative($replace, regexp, this, replaceValue);
if (res.done) return res.value;

var rx = _anObject(regexp);
var S = String(this);
var functionalReplace = typeof replaceValue === 'function';
if (!functionalReplace) replaceValue = String(replaceValue);
var global = rx.global;
if (global) {
var fullUnicode = rx.unicode;
rx.lastIndex = 0;
}
var results = [];
while (true) {
var result = _regexpExecAbstract(rx, S);
if (result === null) break;
results.push(result);
if (!global) break;
var matchStr = String(result[0]);
if (matchStr === '') rx.lastIndex = _advanceStringIndex(S, _toLength(rx.lastIndex), fullUnicode);
}
var accumulatedResult = '';
var nextSourcePosition = 0;
for (var i = 0; i < results.length; i++) {
result = results[i];
var matched = String(result[0]);
var position = max(min$1(_toInteger(result.index), S.length), 0);
var captures = [];
// NOTE: This is equivalent to
// captures = result.slice(1).map(maybeToString)
// but for some reason `nativeSlice.call(result, 1, result.length)` (called in
// the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
// causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
var namedCaptures = result.groups;
if (functionalReplace) {
var replacerArgs = [matched].concat(captures, position, S);
if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
var replacement = String(replaceValue.apply(undefined, replacerArgs));
} else {
replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
}
if (position >= nextSourcePosition) {
accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
nextSourcePosition = position + matched.length;
}
}
return accumulatedResult + S.slice(nextSourcePosition);
}
];

// https://tc39.github.io/ecma262/#sec-getsubstitution
function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {
var tailPos = position + matched.length;
var m = captures.length;
var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
if (namedCaptures !== undefined) {
namedCaptures = _toObject(namedCaptures);
symbols = SUBSTITUTION_SYMBOLS;
}
return $replace.call(replacement, symbols, function (match, ch) {
var capture;
switch (ch.charAt(0)) {
case '$': return '$';
case '&': return matched;
case '`': return str.slice(0, position);
case "'": return str.slice(tailPos);
case '<':
capture = namedCaptures[ch.slice(1, -1)];
break;
default: // \d\d?
var n = +ch;
if (n === 0) return match;
if (n > m) {
var f = floor$1(n / 10);
if (f === 0) return match;
if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
return match;
}
capture = captures[n - 1];
}
return capture === undefined ? '' : capture;
});
}
});

var dP$1 = _objectDp.f;
var FProto = Function.prototype;
var nameRE = /^\s*function ([^ (]*)/;
var NAME = 'name';

// 19.2.4.2 name
NAME in FProto || _descriptors && dP$1(FProto, NAME, {
configurable: true,
get: function () {
try {
return ('' + this).match(nameRE)[1];
} catch (e) {
return '';
}
}
});

// @@match logic
_fixReWks('match', 1, function (defined, MATCH, $match, maybeCallNative) {
return [
// `String.prototype.match` method
// https://tc39.github.io/ecma262/#sec-string.prototype.match
function match(regexp) {
var O = defined(this);
var fn = regexp == undefined ? undefined : regexp[MATCH];
return fn !== undefined ? fn.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
},
// `RegExp.prototype[@@match]` method
// https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match
function (regexp) {
var res = maybeCallNative($match, regexp, this);
if (res.done) return res.value;
var rx = _anObject(regexp);
var S = String(this);
if (!rx.global) return _regexpExecAbstract(rx, S);
var fullUnicode = rx.unicode;
rx.lastIndex = 0;
var A = [];
var n = 0;
var result;
while ((result = _regexpExecAbstract(rx, S)) !== null) {
var matchStr = String(result[0]);
A[n] = matchStr;
if (matchStr === '') rx.lastIndex = _advanceStringIndex(S, _toLength(rx.lastIndex), fullUnicode);
n++;
}
return n === 0 ? null : A;
}
];
});

// 22.1.3.31 Array.prototype[@@unscopables]
var UNSCOPABLES = _wks('unscopables');
var ArrayProto = Array.prototype;
if (ArrayProto[UNSCOPABLES] == undefined) _hide(ArrayProto, UNSCOPABLES, {});
var _addToUnscopables = function (key) {
ArrayProto[UNSCOPABLES][key] = true;
};

var _iterStep = function (done, value) {
return { value: value, done: !!done };
};

var _iterators = {};

// fallback for non-array-like ES3 and non-enumerable old V8 strings

// eslint-disable-next-line no-prototype-builtins
var _iobject = Object('z').propertyIsEnumerable(0) ? Object : function (it) {
return _cof(it) == 'String' ? it.split('') : Object(it);
};

// to indexed object, toObject with fallback for non-array-like ES3 strings

var _toIobject = function (it) {
return _iobject(_defined(it));
};

var max$1 = Math.max;
var min$2 = Math.min;
var _toAbsoluteIndex = function (index, length) {
index = _toInteger(index);
return index < 0 ? max$1(index + length, 0) : min$2(index, length);
};

// false -> Array#indexOf
// true -> Array#includes

var _arrayIncludes = function (IS_INCLUDES) {
return function ($this, el, fromIndex) {
var O = _toIobject($this);
var length = _toLength(O.length);
var index = _toAbsoluteIndex(fromIndex, length);
var value;
// Array#includes uses SameValueZero equality algorithm
// eslint-disable-next-line no-self-compare
if (IS_INCLUDES && el != el) while (length > index) {
value = O[index++];
// eslint-disable-next-line no-self-compare
if (value != value) return true;
// Array#indexOf ignores holes, Array#includes - not
} else for (;length > index; index++) if (IS_INCLUDES || index in O) {
if (O[index] === el) return IS_INCLUDES || index || 0;
} return !IS_INCLUDES && -1;
};
};

var shared = _shared('keys');

var _sharedKey = function (key) {
return shared[key] || (shared[key] = _uid(key));
};

var arrayIndexOf = _arrayIncludes(false);
var IE_PROTO = _sharedKey('IE_PROTO');

var _objectKeysInternal = function (object, names) {
var O = _toIobject(object);
var i = 0;
var result = [];
var key;
for (key in O) if (key != IE_PROTO) _has(O, key) && result.push(key);
// Don't enum bug & hidden keys
while (names.length > i) if (_has(O, key = names[i++])) {
~arrayIndexOf(result, key) || result.push(key);
}
return result;
};

// IE 8- don't enum bug keys
var _enumBugKeys = (
'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'
).split(',');

// 19.1.2.14 / 15.2.3.14 Object.keys(O)

var _objectKeys = Object.keys || function keys(O) {
return _objectKeysInternal(O, _enumBugKeys);
};

var _objectDps = _descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
_anObject(O);
var keys = _objectKeys(Properties);
var length = keys.length;
var i = 0;
var P;
while (length > i) _objectDp.f(O, P = keys[i++], Properties[P]);
return O;
};

var document$2 = _global.document;
var _html = document$2 && document$2.documentElement;

// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])

var IE_PROTO$1 = _sharedKey('IE_PROTO');
var Empty = function () { /* empty */ };
var PROTOTYPE$1 = 'prototype';

// Create object with fake `null` prototype: use iframe Object with cleared prototype
var createDict = function () {
// Thrash, waste and sodomy: IE GC bug
var iframe = _domCreate('iframe');
var i = _enumBugKeys.length;
var lt = '<';
var gt = '>';
var iframeDocument;
iframe.style.display = 'none';
_html.appendChild(iframe);
iframe.src = 'javascript:'; // eslint-disable-line no-script-url
// createDict = iframe.contentWindow.Object;
// html.removeChild(iframe);
iframeDocument = iframe.contentWindow.document;
iframeDocument.open();
iframeDocument.write(lt + 'script' + gt + 'document.F=Object' + lt + '/script' + gt);
iframeDocument.close();
createDict = iframeDocument.F;
while (i--) delete createDict[PROTOTYPE$1][_enumBugKeys[i]];
return createDict();
};

var _objectCreate = Object.create || function create(O, Properties) {
var result;
if (O !== null) {
Empty[PROTOTYPE$1] = _anObject(O);
result = new Empty();
Empty[PROTOTYPE$1] = null;
// add "__proto__" for Object.getPrototypeOf polyfill
result[IE_PROTO$1] = O;
} else result = createDict();
return Properties === undefined ? result : _objectDps(result, Properties);
};

var def = _objectDp.f;

var TAG$1 = _wks('toStringTag');

var _setToStringTag = function (it, tag, stat) {
if (it && !_has(it = stat ? it : it.prototype, TAG$1)) def(it, TAG$1, { configurable: true, value: tag });
};

var IteratorPrototype = {};

// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
_hide(IteratorPrototype, _wks('iterator'), function () { return this; });

var _iterCreate = function (Constructor, NAME, next) {
Constructor.prototype = _objectCreate(IteratorPrototype, { next: _propertyDesc(1, next) });
_setToStringTag(Constructor, NAME + ' Iterator');
};

// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)

var IE_PROTO$2 = _sharedKey('IE_PROTO');
var ObjectProto = Object.prototype;

var _objectGpo = Object.getPrototypeOf || function (O) {
O = _toObject(O);
if (_has(O, IE_PROTO$2)) return O[IE_PROTO$2];
if (typeof O.constructor == 'function' && O instanceof O.constructor) {
return O.constructor.prototype;
} return O instanceof Object ? ObjectProto : null;
};

var ITERATOR = _wks('iterator');
var BUGGY = !([].keys && 'next' in [].keys()); // Safari has buggy iterators w/o `next`
var FF_ITERATOR = '@@iterator';
var KEYS = 'keys';
var VALUES = 'values';

var returnThis = function () { return this; };

var _iterDefine = function (Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED) {
_iterCreate(Constructor, NAME, next);
var getMethod = function (kind) {
if (!BUGGY && kind in proto) return proto[kind];
switch (kind) {
case KEYS: return function keys() { return new Constructor(this, kind); };
case VALUES: return function values() { return new Constructor(this, kind); };
} return function entries() { return new Constructor(this, kind); };
};
var TAG = NAME + ' Iterator';
var DEF_VALUES = DEFAULT == VALUES;
var VALUES_BUG = false;
var proto = Base.prototype;
var $native = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT];
var $default = $native || getMethod(DEFAULT);
var $entries = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined;
var $anyNative = NAME == 'Array' ? proto.entries || $native : $native;
var methods, key, IteratorPrototype;
// Fix native
if ($anyNative) {
IteratorPrototype = _objectGpo($anyNative.call(new Base()));
if (IteratorPrototype !== Object.prototype && IteratorPrototype.next) {
// Set @@toStringTag to native iterators
_setToStringTag(IteratorPrototype, TAG, true);
// fix for some old engines
if (!_library && typeof IteratorPrototype[ITERATOR] != 'function') _hide(IteratorPrototype, ITERATOR, returnThis);
}
}
// fix Array#{values, @@iterator}.name in V8 / FF
if (DEF_VALUES && $native && $native.name !== VALUES) {
VALUES_BUG = true;
$default = function values() { return $native.call(this); };
}
// Define iterator
if ((!_library || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])) {
_hide(proto, ITERATOR, $default);
}
// Plug for library
_iterators[NAME] = $default;
_iterators[TAG] = returnThis;
if (DEFAULT) {
methods = {
values: DEF_VALUES ? $default : getMethod(VALUES),
keys: IS_SET ? $default : getMethod(KEYS),
entries: $entries
};
if (FORCED) for (key in methods) {
if (!(key in proto)) _redefine(proto, key, methods[key]);
} else _export(_export.P + _export.F * (BUGGY || VALUES_BUG), NAME, methods);
}
return methods;
};

// 22.1.3.4 Array.prototype.entries()
// 22.1.3.13 Array.prototype.keys()
// 22.1.3.29 Array.prototype.values()
// 22.1.3.30 Array.prototype[@@iterator]()
var es6_array_iterator = _iterDefine(Array, 'Array', function (iterated, kind) {
this._t = _toIobject(iterated); // target
this._i = 0; // next index
this._k = kind; // kind
// 22.1.5.2.1 %ArrayIteratorPrototype%.next()
}, function () {
var O = this._t;
var kind = this._k;
var index = this._i++;
if (!O || index >= O.length) {
this._t = undefined;
return _iterStep(1);
}
if (kind == 'keys') return _iterStep(0, index);
if (kind == 'values') return _iterStep(0, O[index]);
return _iterStep(0, [index, O[index]]);
}, 'values');

// argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
_iterators.Arguments = _iterators.Array;

_addToUnscopables('keys');
_addToUnscopables('values');
_addToUnscopables('entries');

var ITERATOR$1 = _wks('iterator');
var TO_STRING_TAG = _wks('toStringTag');
var ArrayValues = _iterators.Array;

var DOMIterables = {
CSSRuleList: true, // TODO: Not spec compliant, should be false.
CSSStyleDeclaration: false,
CSSValueList: false,
ClientRectList: false,
DOMRectList: false,
DOMStringList: false,
DOMTokenList: true,
DataTransferItemList: false,
FileList: false,
HTMLAllCollection: false,
HTMLCollection: false,
HTMLFormElement: false,
HTMLSelectElement: false,
MediaList: true, // TODO: Not spec compliant, should be false.
MimeTypeArray: false,
NamedNodeMap: false,
NodeList: true,
PaintRequestList: false,
Plugin: false,
PluginArray: false,
SVGLengthList: false,
SVGNumberList: false,
SVGPathSegList: false,
SVGPointList: false,
SVGStringList: false,
SVGTransformList: false,
SourceBufferList: false,
StyleSheetList: true, // TODO: Not spec compliant, should be false.
TextTrackCueList: false,
TextTrackList: false,
TouchList: false
};

for (var collections = _objectKeys(DOMIterables), i = 0; i < collections.length; i++) {
var NAME$1 = collections[i];
var explicit = DOMIterables[NAME$1];
var Collection = _global[NAME$1];
var proto = Collection && Collection.prototype;
var key;
if (proto) {
if (!proto[ITERATOR$1]) _hide(proto, ITERATOR$1, ArrayValues);
if (!proto[TO_STRING_TAG]) _hide(proto, TO_STRING_TAG, NAME$1);
_iterators[NAME$1] = ArrayValues;
if (explicit) for (key in es6_array_iterator) if (!proto[key]) _redefine(proto, key, es6_array_iterator[key], true);
}
}

var $at = _stringAt(true);

// 21.1.3.27 String.prototype[@@iterator]()
_iterDefine(String, 'String', function (iterated) {
this._t = String(iterated); // target
this._i = 0; // next index
// 21.1.5.2.1 %StringIteratorPrototype%.next()
}, function () {
var O = this._t;
var index = this._i;
var point;
if (index >= O.length) return { value: undefined, done: true };
point = $at(O, index);
this._i += point.length;
return { value: point, done: false };
});

// call something on iterator step with safe closing on error

var _iterCall = function (iterator, fn, value, entries) {
try {
return entries ? fn(_anObject(value)[0], value[1]) : fn(value);
// 7.4.6 IteratorClose(iterator, completion)
} catch (e) {
var ret = iterator['return'];
if (ret !== undefined) _anObject(ret.call(iterator));
throw e;
}
};

// check on default Array iterator

var ITERATOR$2 = _wks('iterator');
var ArrayProto$1 = Array.prototype;

var _isArrayIter = function (it) {
return it !== undefined && (_iterators.Array === it || ArrayProto$1[ITERATOR$2] === it);
};

var _createProperty = function (object, index, value) {
if (index in object) _objectDp.f(object, index, _propertyDesc(0, value));
else object[index] = value;
};

var ITERATOR$3 = _wks('iterator');

var core_getIteratorMethod = _core.getIteratorMethod = function (it) {
if (it != undefined) return it[ITERATOR$3]
|| it['@@iterator']
|| _iterators[_classof(it)];
};

var ITERATOR$4 = _wks('iterator');
var SAFE_CLOSING = false;

try {
var riter = [7][ITERATOR$4]();
riter['return'] = function () { SAFE_CLOSING = true; };
} catch (e) { /* empty */ }

var _iterDetect = function (exec, skipClosing) {
if (!skipClosing && !SAFE_CLOSING) return false;
var safe = false;
try {
var arr = [7];
var iter = arr[ITERATOR$4]();
iter.next = function () { return { done: safe = true }; };
arr[ITERATOR$4] = function () { return iter; };
exec(arr);
} catch (e) { /* empty */ }
return safe;
};

_export(_export.S + _export.F * !_iterDetect(function (iter) { }), 'Array', {
// 22.1.2.1 Array.from(arrayLike, mapfn = undefined, thisArg = undefined)
from: function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
var O = _toObject(arrayLike);
var C = typeof this == 'function' ? this : Array;
var aLen = arguments.length;
var mapfn = aLen > 1 ? arguments[1] : undefined;
var mapping = mapfn !== undefined;
var index = 0;
var iterFn = core_getIteratorMethod(O);
var length, result, step, iterator;
if (mapping) mapfn = _ctx(mapfn, aLen > 2 ? arguments[2] : undefined, 2);
// if object isn't iterable or it's array with default iterator - use simple case
if (iterFn != undefined && !(C == Array && _isArrayIter(iterFn))) {
for (iterator = iterFn.call(O), result = new C(); !(step = iterator.next()).done; index++) {
_createProperty(result, index, mapping ? _iterCall(iterator, mapfn, [step.value, index], true) : step.value);
}
} else {
length = _toLength(O.length);
for (result = new C(length); length > index; index++) {
_createProperty(result, index, mapping ? mapfn(O[index], index) : O[index]);
}
}
result.length = index;
return result;
}
});

function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}

function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}

function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}

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 _objectSpread(target) {
for (var i = 1; i < arguments.length; i++) {
var source = arguments[i] != null ? arguments[i] : {};
var ownKeys = Object.keys(source);

if (typeof Object.getOwnPropertySymbols === 'function') {
ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {
return Object.getOwnPropertyDescriptor(source, sym).enumerable;
}));
}

ownKeys.forEach(function (key) {
_defineProperty(target, key, source[key]);
});
}

return target;
}

var scrollbarWidth = createCommonjsModule(function (module, exports) {
/*! scrollbarWidth.js v0.1.3 | felixexter | MIT | https://github.com/felixexter/scrollbarWidth */
(function (root, factory) {
{
module.exports = factory();
}
}(commonjsGlobal, function () {

function scrollbarWidth() {
if (typeof document === 'undefined') {
return 0
}

var
body = document.body,
box = document.createElement('div'),
boxStyle = box.style,
width;

boxStyle.position = 'absolute';
boxStyle.top = boxStyle.left = '-9999px';
boxStyle.width = boxStyle.height = '100px';
boxStyle.overflow = 'scroll';

body.appendChild(box);

width = box.offsetWidth - box.clientWidth;

body.removeChild(box);

return width;
}

return scrollbarWidth;
}));
});

/**
* lodash (Custom Build) <https://lodash.com/>
* Build: `lodash modularize exports="npm" -o ./`
* Copyright jQuery Foundation and other contributors <https://jquery.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/

/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';

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

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

/** Used to match leading and trailing whitespace. */
var reTrim = /^\s+|\s+$/g;

/** 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;

/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

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

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

/** 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 objectToString = objectProto.toString;

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

/**
* 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 = function() {
return root.Date.now();
};

/**
* 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(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);
}
wait = toNumber(wait) || 0;
if (isObject(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,
result = wait - timeSinceLastCall;

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

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.
timerId = setTimeout(timerExpired, wait);
return invokeFunc(lastCallTime);
}
}
if (timerId === undefined) {
timerId = setTimeout(timerExpired, wait);
}
return result;
}
debounced.cancel = cancel;
debounced.flush = flush;
return debounced;
}

/**
* 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(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
});
}

/**
* 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(value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}

/**
* 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(value) {
return !!value && typeof value == 'object';
}

/**
* 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(value) {
return typeof value == 'symbol' ||
(isObjectLike(value) && objectToString.call(value) == symbolTag);
}

/**
* 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(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol(value)) {
return NAN;
}
if (isObject(value)) {
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
value = isObject(other) ? (other + '') : other;
}
if (typeof value != 'string') {
return value === 0 ? value : +value;
}
value = value.replace(reTrim, '');
var isBinary = reIsBinary.test(value);
return (isBinary || reIsOctal.test(value))
? freeParseInt(value.slice(2), isBinary ? 2 : 8)
: (reIsBadHex.test(value) ? NAN : +value);
}

var lodash_throttle = throttle;

/**
* lodash (Custom Build) <https://lodash.com/>
* Build: `lodash modularize exports="npm" -o ./`
* Copyright jQuery Foundation and other contributors <https://jquery.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/

/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$1 = 'Expected a function';

/** Used as references for various `Number` constants. */
var NAN$1 = 0 / 0;

/** `Object#toString` result references. */
var symbolTag$1 = '[object Symbol]';

/** Used to match leading and trailing whitespace. */
var reTrim$1 = /^\s+|\s+$/g;

/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex$1 = /^[-+]0x[0-9a-f]+$/i;

/** Used to detect binary string values. */
var reIsBinary$1 = /^0b[01]+$/i;

/** Used to detect octal string values. */
var reIsOctal$1 = /^0o[0-7]+$/i;

/** Built-in method references without a dependency on `root`. */
var freeParseInt$1 = parseInt;

/** Detect free variable `global` from Node.js. */
var freeGlobal$1 = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

/** Detect free variable `self`. */
var freeSelf$1 = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root$1 = freeGlobal$1 || freeSelf$1 || Function('return this')();

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

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

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$1 = Math.max,
nativeMin$1 = Math.min;

/**
* 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();
};

/**
* 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$1(wait) || 0;
if (isObject$1(options)) {
leading = !!options.leading;
maxing = 'maxWait' in options;
maxWait = maxing ? nativeMax$1(toNumber$1(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,
result = wait - timeSinceLastCall;

return maxing ? nativeMin$1(result, maxWait - timeSinceLastInvoke) : result;
}

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$1();
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$1());
}

function debounced() {
var time = now$1(),
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.
timerId = setTimeout(timerExpired, wait);
return invokeFunc(lastCallTime);
}
}
if (timerId === undefined) {
timerId = setTimeout(timerExpired, wait);
}
return result;
}
debounced.cancel = cancel;
debounced.flush = flush;
return debounced;
}

/**
* 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$1(value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}

/**
* 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 && typeof value == 'object';
}

/**
* 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$1(value) && objectToString$1.call(value) == symbolTag$1);
}

/**
* 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$1(value)) {
return NAN$1;
}
if (isObject$1(value)) {
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
value = isObject$1(other) ? (other + '') : other;
}
if (typeof value != 'string') {
return value === 0 ? value : +value;
}
value = value.replace(reTrim$1, '');
var isBinary = reIsBinary$1.test(value);
return (isBinary || reIsOctal$1.test(value))
? freeParseInt$1(value.slice(2), isBinary ? 2 : 8)
: (reIsBadHex$1.test(value) ? NAN$1 : +value);
}

var lodash_debounce = debounce$1;

/**
* lodash (Custom Build) <https://lodash.com/>
* Build: `lodash modularize exports="npm" -o ./`
* Copyright jQuery Foundation and other contributors <https://jquery.org/>
* Released under MIT license <https://lodash.com/license>
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
*/

/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT$2 = 'Expected a function';

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';

/** `Object#toString` result references. */
var funcTag = '[object Function]',
genTag = '[object GeneratorFunction]';

/**
* Used to match `RegExp`
* [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
*/
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;

/** Detect free variable `global` from Node.js. */
var freeGlobal$2 = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

/** Detect free variable `self`. */
var freeSelf$2 = typeof self == 'object' && self && self.Object === Object && self;

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

/**
* Gets the value at `key` of `object`.
*
* @private
* @param {Object} [object] The object to query.
* @param {string} key The key of the property to get.
* @returns {*} Returns the property value.
*/
function getValue(object, key) {
return object == null ? undefined : object[key];
}

/**
* Checks if `value` is a host object in IE < 9.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a host object, else `false`.
*/
function isHostObject(value) {
// Many host objects are `Object` objects that can coerce to strings
// despite having improperly defined `toString` methods.
var result = false;
if (value != null && typeof value.toString != 'function') {
try {
result = !!(value + '');
} catch (e) {}
}
return result;
}

/** Used for built-in method references. */
var arrayProto = Array.prototype,
funcProto = Function.prototype,
objectProto$2 = Object.prototype;

/** Used to detect overreaching core-js shims. */
var coreJsData = root$2['__core-js_shared__'];

/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
return uid ? ('Symbol(src)_1.' + uid) : '';
}());

/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;

/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$2.hasOwnProperty;

/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var objectToString$2 = objectProto$2.toString;

/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
funcToString.call(hasOwnProperty$1).replace(reRegExpChar, '\\$&')
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);

/** Built-in value references. */
var splice = arrayProto.splice;

/* Built-in method references that are verified to be native. */
var Map$1 = getNative(root$2, 'Map'),
nativeCreate = getNative(Object, 'create');

/**
* Creates a hash object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function Hash(entries) {
var index = -1,
length = entries ? entries.length : 0;

this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}

/**
* Removes all key-value entries from the hash.
*
* @private
* @name clear
* @memberOf Hash
*/
function hashClear() {
this.__data__ = nativeCreate ? nativeCreate(null) : {};
}

/**
* Removes `key` and its value from the hash.
*
* @private
* @name delete
* @memberOf Hash
* @param {Object} hash The hash to modify.
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function hashDelete(key) {
return this.has(key) && delete this.__data__[key];
}

/**
* Gets the hash value for `key`.
*
* @private
* @name get
* @memberOf Hash
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function hashGet(key) {
var data = this.__data__;
if (nativeCreate) {
var result = data[key];
return result === HASH_UNDEFINED ? undefined : result;
}
return hasOwnProperty$1.call(data, key) ? data[key] : undefined;
}

/**
* Checks if a hash value for `key` exists.
*
* @private
* @name has
* @memberOf Hash
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function hashHas(key) {
var data = this.__data__;
return nativeCreate ? data[key] !== undefined : hasOwnProperty$1.call(data, key);
}

/**
* Sets the hash `key` to `value`.
*
* @private
* @name set
* @memberOf Hash
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the hash instance.
*/
function hashSet(key, value) {
var data = this.__data__;
data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
return this;
}

// Add methods to `Hash`.
Hash.prototype.clear = hashClear;
Hash.prototype['delete'] = hashDelete;
Hash.prototype.get = hashGet;
Hash.prototype.has = hashHas;
Hash.prototype.set = hashSet;

/**
* Creates an list cache object.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function ListCache(entries) {
var index = -1,
length = entries ? entries.length : 0;

this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}

/**
* Removes all key-value entries from the list cache.
*
* @private
* @name clear
* @memberOf ListCache
*/
function listCacheClear() {
this.__data__ = [];
}

/**
* Removes `key` and its value from the list cache.
*
* @private
* @name delete
* @memberOf ListCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function listCacheDelete(key) {
var data = this.__data__,
index = assocIndexOf(data, key);

if (index < 0) {
return false;
}
var lastIndex = data.length - 1;
if (index == lastIndex) {
data.pop();
} else {
splice.call(data, index, 1);
}
return true;
}

/**
* Gets the list cache value for `key`.
*
* @private
* @name get
* @memberOf ListCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function listCacheGet(key) {
var data = this.__data__,
index = assocIndexOf(data, key);

return index < 0 ? undefined : data[index][1];
}

/**
* Checks if a list cache value for `key` exists.
*
* @private
* @name has
* @memberOf ListCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function listCacheHas(key) {
return assocIndexOf(this.__data__, key) > -1;
}

/**
* Sets the list cache `key` to `value`.
*
* @private
* @name set
* @memberOf ListCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the list cache instance.
*/
function listCacheSet(key, value) {
var data = this.__data__,
index = assocIndexOf(data, key);

if (index < 0) {
data.push([key, value]);
} else {
data[index][1] = value;
}
return this;
}

// Add methods to `ListCache`.
ListCache.prototype.clear = listCacheClear;
ListCache.prototype['delete'] = listCacheDelete;
ListCache.prototype.get = listCacheGet;
ListCache.prototype.has = listCacheHas;
ListCache.prototype.set = listCacheSet;

/**
* Creates a map cache object to store key-value pairs.
*
* @private
* @constructor
* @param {Array} [entries] The key-value pairs to cache.
*/
function MapCache(entries) {
var index = -1,
length = entries ? entries.length : 0;

this.clear();
while (++index < length) {
var entry = entries[index];
this.set(entry[0], entry[1]);
}
}

/**
* Removes all key-value entries from the map.
*
* @private
* @name clear
* @memberOf MapCache
*/
function mapCacheClear() {
this.__data__ = {
'hash': new Hash,
'map': new (Map$1 || ListCache),
'string': new Hash
};
}

/**
* Removes `key` and its value from the map.
*
* @private
* @name delete
* @memberOf MapCache
* @param {string} key The key of the value to remove.
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
*/
function mapCacheDelete(key) {
return getMapData(this, key)['delete'](key);
}

/**
* Gets the map value for `key`.
*
* @private
* @name get
* @memberOf MapCache
* @param {string} key The key of the value to get.
* @returns {*} Returns the entry value.
*/
function mapCacheGet(key) {
return getMapData(this, key).get(key);
}

/**
* Checks if a map value for `key` exists.
*
* @private
* @name has
* @memberOf MapCache
* @param {string} key The key of the entry to check.
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
*/
function mapCacheHas(key) {
return getMapData(this, key).has(key);
}

/**
* Sets the map `key` to `value`.
*
* @private
* @name set
* @memberOf MapCache
* @param {string} key The key of the value to set.
* @param {*} value The value to set.
* @returns {Object} Returns the map cache instance.
*/
function mapCacheSet(key, value) {
getMapData(this, key).set(key, value);
return this;
}

// Add methods to `MapCache`.
MapCache.prototype.clear = mapCacheClear;
MapCache.prototype['delete'] = mapCacheDelete;
MapCache.prototype.get = mapCacheGet;
MapCache.prototype.has = mapCacheHas;
MapCache.prototype.set = mapCacheSet;

/**
* Gets the index at which the `key` is found in `array` of key-value pairs.
*
* @private
* @param {Array} array The array to inspect.
* @param {*} key The key to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
*/
function assocIndexOf(array, key) {
var length = array.length;
while (length--) {
if (eq(array[length][0], key)) {
return length;
}
}
return -1;
}

/**
* The base implementation of `_.isNative` without bad shim checks.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a native function,
* else `false`.
*/
function baseIsNative(value) {
if (!isObject$2(value) || isMasked(value)) {
return false;
}
var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
return pattern.test(toSource(value));
}

/**
* Gets the data for `map`.
*
* @private
* @param {Object} map The map to query.
* @param {string} key The reference key.
* @returns {*} Returns the map data.
*/
function getMapData(map, key) {
var data = map.__data__;
return isKeyable(key)
? data[typeof key == 'string' ? 'string' : 'hash']
: data.map;
}

/**
* Gets the native function at `key` of `object`.
*
* @private
* @param {Object} object The object to query.
* @param {string} key The key of the method to get.
* @returns {*} Returns the function if it's native, else `undefined`.
*/
function getNative(object, key) {
var value = getValue(object, key);
return baseIsNative(value) ? value : undefined;
}

/**
* Checks if `value` is suitable for use as unique object key.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is suitable, else `false`.
*/
function isKeyable(value) {
var type = typeof value;
return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
? (value !== '__proto__')
: (value === null);
}

/**
* Checks if `func` has its source masked.
*
* @private
* @param {Function} func The function to check.
* @returns {boolean} Returns `true` if `func` is masked, else `false`.
*/
function isMasked(func) {
return !!maskSrcKey && (maskSrcKey in func);
}

/**
* Converts `func` to its source code.
*
* @private
* @param {Function} func The function to process.
* @returns {string} Returns the source code.
*/
function toSource(func) {
if (func != null) {
try {
return funcToString.call(func);
} catch (e) {}
try {
return (func + '');
} catch (e) {}
}
return '';
}

/**
* Creates a function that memoizes the result of `func`. If `resolver` is
* provided, it determines the cache key for storing the result based on the
* arguments provided to the memoized function. By default, the first argument
* provided to the memoized function is used as the map cache key. The `func`
* is invoked with the `this` binding of the memoized function.
*
* **Note:** The cache is exposed as the `cache` property on the memoized
* function. Its creation may be customized by replacing the `_.memoize.Cache`
* constructor with one whose instances implement the
* [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
* method interface of `delete`, `get`, `has`, and `set`.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Function
* @param {Function} func The function to have its output memoized.
* @param {Function} [resolver] The function to resolve the cache key.
* @returns {Function} Returns the new memoized function.
* @example
*
* var object = { 'a': 1, 'b': 2 };
* var other = { 'c': 3, 'd': 4 };
*
* var values = _.memoize(_.values);
* values(object);
* // => [1, 2]
*
* values(other);
* // => [3, 4]
*
* object.a = 2;
* values(object);
* // => [1, 2]
*
* // Modify the result cache.
* values.cache.set(object, ['a', 'b']);
* values(object);
* // => ['a', 'b']
*
* // Replace `_.memoize.Cache`.
* _.memoize.Cache = WeakMap;
*/
function memoize(func, resolver) {
if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
throw new TypeError(FUNC_ERROR_TEXT$2);
}
var memoized = function() {
var args = arguments,
key = resolver ? resolver.apply(this, args) : args[0],
cache = memoized.cache;

if (cache.has(key)) {
return cache.get(key);
}
var result = func.apply(this, args);
memoized.cache = cache.set(key, result);
return result;
};
memoized.cache = new (memoize.Cache || MapCache);
return memoized;
}

// Assign cache to `_.memoize`.
memoize.Cache = MapCache;

/**
* Performs a
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
* comparison between two values to determine if they are equivalent.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to compare.
* @param {*} other The other value to compare.
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
* var object = { 'a': 1 };
* var other = { 'a': 1 };
*
* _.eq(object, object);
* // => true
*
* _.eq(object, other);
* // => false
*
* _.eq('a', 'a');
* // => true
*
* _.eq('a', Object('a'));
* // => false
*
* _.eq(NaN, NaN);
* // => true
*/
function eq(value, other) {
return value === other || (value !== value && other !== other);
}

/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 8-9 which returns 'object' for typed array and other constructors.
var tag = isObject$2(value) ? objectToString$2.call(value) : '';
return tag == funcTag || tag == genTag;
}

/**
* 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$2(value) {
var type = typeof value;
return !!value && (type == 'object' || type == 'function');
}

var lodash_memoize = memoize;

/**
* 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$1 (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$1(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}
*/
ResizeObserverSPI.prototype.unobserve = 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 not being observed.
if (!observations.has(target)) {
return;
}
observations.delete(target);
if (!observations.size) {
this.controller_.removeObserver(this);
}
};
/**
* Stops observing all elements.
*
* @returns {void}
*/
ResizeObserverSPI.prototype.disconnect = function () {
this.clearActive();
this.observations_.clear();
this.controller_.removeObserver(this);
};
/**
* Collects observation instances the associated element of which has changed
* it's content rectangle.
*
* @returns {void}
*/
ResizeObserverSPI.prototype.gatherActive = function () {
var _this = this;
this.clearActive();
this.observations_.forEach(function (observation) {
if (observation.isActive()) {
_this.activeObservations_.push(observation);
}
});
};
/**
* Invokes initial callback function with a list of ResizeObserverEntry
* instances collected from active resize observations.
*
* @returns {void}
*/
ResizeObserverSPI.prototype.broadcastActive = function () {
// Do nothing if observer doesn't have active observations.
if (!this.hasActive()) {
return;
}
var ctx = this.callbackCtx_;
// Create ResizeObserverEntry instance for every active observation.
var entries = this.activeObservations_.map(function (observation) {
return new ResizeObserverEntry(observation.target, observation.broadcastRect());
});
this.callback_.call(ctx, entries, ctx);
this.clearActive();
};
/**
* Clears the collection of active observations.
*
* @returns {void}
*/
ResizeObserverSPI.prototype.clearActive = function () {
this.activeObservations_.splice(0);
};
/**
* Tells whether observer has active observations.
*
* @returns {boolean}
*/
ResizeObserverSPI.prototype.hasActive = function () {
return this.activeObservations_.length > 0;
};
return ResizeObserverSPI;
}());

// Registry of internal observers. If WeakMap is not available use current shim
// for the Map collection as it has all required methods and because WeakMap
// can't be fully polyfilled anyway.
var observers = typeof WeakMap !== 'undefined' ? new WeakMap() : new MapShim();
/**
* ResizeObserver API. Encapsulates the ResizeObserver SPI implementation
* exposing only those methods and properties that are defined in the spec.
*/
var ResizeObserver = /** @class */ (function () {
/**
* Creates a new instance of ResizeObserver.
*
* @param {ResizeObserverCallback} callback - Callback that is invoked when
* dimensions of the observed elements change.
*/
function ResizeObserver(callback) {
if (!(this instanceof ResizeObserver)) {
throw new TypeError('Cannot call a class as a function.');
}
if (!arguments.length) {
throw new TypeError('1 argument required, but only 0 present.');
}
var controller = ResizeObserverController.getInstance();
var observer = new ResizeObserverSPI(callback, controller, this);
observers.set(this, observer);
}
return ResizeObserver;
}());
// Expose public methods of ResizeObserver.
[
'observe',
'unobserve',
'disconnect'
].forEach(function (method) {
ResizeObserver.prototype[method] = function () {
var _a;
return (_a = observers.get(this))[method].apply(_a, arguments);
};
});

var index = (function () {
// Export existing implementation if available.
if (typeof global$1.ResizeObserver !== 'undefined') {
return global$1.ResizeObserver;
}
return ResizeObserver;
})();

var canUseDOM = !!(
typeof window !== 'undefined' &&
window.document &&
window.document.createElement
);

var canUseDom = canUseDOM;

var SimpleBar =
/*#__PURE__*/
function () {
function SimpleBar(element, options) {
var _this = this;

_classCallCheck(this, SimpleBar);

this.onScroll = function () {
if (!_this.scrollXTicking) {
window.requestAnimationFrame(_this.scrollX);
_this.scrollXTicking = true;
}

if (!_this.scrollYTicking) {
window.requestAnimationFrame(_this.scrollY);
_this.scrollYTicking = true;
}
};

this.scrollX = function () {
if (_this.axis.x.isOverflowing) {
_this.showScrollbar('x');

_this.positionScrollbar('x');
}

_this.scrollXTicking = false;
};

this.scrollY = function () {
if (_this.axis.y.isOverflowing) {
_this.showScrollbar('y');

_this.positionScrollbar('y');
}

_this.scrollYTicking = false;
};

this.onMouseEnter = function () {
_this.showScrollbar('x');

_this.showScrollbar('y');
};

this.onMouseMove = function (e) {
_this.mouseX = e.clientX;
_this.mouseY = e.clientY;

if (_this.axis.x.isOverflowing || _this.axis.x.forceVisible) {
_this.onMouseMoveForAxis('x');
}

if (_this.axis.y.isOverflowing || _this.axis.y.forceVisible) {
_this.onMouseMoveForAxis('y');
}
};

this.onMouseLeave = function () {
_this.onMouseMove.cancel();

if (_this.axis.x.isOverflowing || _this.axis.x.forceVisible) {
_this.onMouseLeaveForAxis('x');
}

if (_this.axis.y.isOverflowing || _this.axis.y.forceVisible) {
_this.onMouseLeaveForAxis('y');
}

_this.mouseX = -1;
_this.mouseY = -1;
};

this.onWindowResize = function () {
// Recalculate scrollbarWidth in case it's a zoom
_this.scrollbarWidth = scrollbarWidth();

_this.hideNativeScrollbar();
};

this.hideScrollbars = function () {
_this.axis.x.track.rect = _this.axis.x.track.el.getBoundingClientRect();
_this.axis.y.track.rect = _this.axis.y.track.el.getBoundingClientRect();

if (!_this.isWithinBounds(_this.axis.y.track.rect)) {
_this.axis.y.scrollbar.el.classList.remove(_this.classNames.visible);

_this.axis.y.isVisible = false;
}

if (!_this.isWithinBounds(_this.axis.x.track.rect)) {
_this.axis.x.scrollbar.el.classList.remove(_this.classNames.visible);

_this.axis.x.isVisible = false;
}
};

this.onPointerEvent = function (e) {
var isWithinBoundsY, isWithinBoundsX;
_this.axis.x.scrollbar.rect = _this.axis.x.scrollbar.el.getBoundingClientRect();
_this.axis.y.scrollbar.rect = _this.axis.y.scrollbar.el.getBoundingClientRect();

if (_this.axis.x.isOverflowing || _this.axis.x.forceVisible) {
isWithinBoundsX = _this.isWithinBounds(_this.axis.x.scrollbar.rect);
}

if (_this.axis.y.isOverflowing || _this.axis.y.forceVisible) {
isWithinBoundsY = _this.isWithinBounds(_this.axis.y.scrollbar.rect);
} // If any pointer event is called on the scrollbar

if (isWithinBoundsY || isWithinBoundsX) {
// Preventing the event's default action stops text being
// selectable during the drag.
e.preventDefault(); // Prevent event leaking

e.stopPropagation();

if (e.type === 'mousedown') {
if (isWithinBoundsY) {
_this.onDragStart(e, 'y');
}

if (isWithinBoundsX) {
_this.onDragStart(e, 'x');
}
}
}
};

this.drag = function (e) {
var eventOffset;
var track = _this.axis[_this.draggedAxis].track;
var trackSize = track.rect[_this.axis[_this.draggedAxis].sizeAttr];
var scrollbar = _this.axis[_this.draggedAxis].scrollbar;
e.preventDefault();
e.stopPropagation();

if (_this.draggedAxis === 'y') {
eventOffset = e.pageY;
} else {
eventOffset = e.pageX;
} // Calculate how far the user's mouse is from the top/left of the scrollbar (minus the dragOffset).

var dragPos = eventOffset - track.rect[_this.axis[_this.draggedAxis].offsetAttr] - _this.axis[_this.draggedAxis].dragOffset; // Convert the mouse position into a percentage of the scrollbar height/width.

var dragPerc = dragPos / track.rect[_this.axis[_this.draggedAxis].sizeAttr]; // Scroll the content by the same percentage.

var scrollPos = dragPerc * _this.contentEl[_this.axis[_this.draggedAxis].scrollSizeAttr]; // Fix browsers inconsistency on RTL

if (_this.draggedAxis === 'x') {
scrollPos = _this.isRtl && SimpleBar.getRtlHelpers().isRtlScrollbarInverted ? scrollPos - (trackSize + scrollbar.size) : scrollPos;
scrollPos = _this.isRtl && SimpleBar.getRtlHelpers().isRtlScrollingInverted ? -scrollPos : scrollPos;
}

_this.contentEl[_this.axis[_this.draggedAxis].scrollOffsetAttr] = scrollPos;
};

this.onEndDrag = function (e) {
e.preventDefault();
e.stopPropagation();
document.removeEventListener('mousemove', _this.drag);
document.removeEventListener('mouseup', _this.onEndDrag);
};

this.el = element;
this.flashTimeout;
this.contentEl;
this.offsetEl;
this.maskEl;
this.globalObserver;
this.mutationObserver;
this.resizeObserver;
this.scrollbarWidth;
this.minScrollbarWidth = 20;
this.options = _objectSpread({}, SimpleBar.defaultOptions, options);
this.classNames = _objectSpread({}, SimpleBar.defaultOptions.classNames, this.options.classNames);
this.isRtl;
this.axis = {
x: {
scrollOffsetAttr: 'scrollLeft',
sizeAttr: 'width',
scrollSizeAttr: 'scrollWidth',
offsetAttr: 'left',
overflowAttr: 'overflowX',
dragOffset: 0,
isOverflowing: true,
isVisible: false,
forceVisible: false,
track: {},
scrollbar: {}
},
y: {
scrollOffsetAttr: 'scrollTop',
sizeAttr: 'height',
scrollSizeAttr: 'scrollHeight',
offsetAttr: 'top',
overflowAttr: 'overflowY',
dragOffset: 0,
isOverflowing: true,
isVisible: false,
forceVisible: false,
track: {},
scrollbar: {}
}
};
this.recalculate = lodash_throttle(this.recalculate.bind(this), 64);
this.onMouseMove = lodash_throttle(this.onMouseMove.bind(this), 64);
this.hideScrollbars = lodash_debounce(this.hideScrollbars.bind(this), this.options.timeout);
this.onWindowResize = lodash_debounce(this.onWindowResize.bind(this), 64, {
leading: true
});
SimpleBar.getRtlHelpers = lodash_memoize(SimpleBar.getRtlHelpers); // getContentElement is deprecated

this.getContentElement = this.getScrollElement;
this.init();
}
/**
* Static properties
*/

/**
* Helper to fix browsers inconsistency on RTL:
* - Firefox inverts the scrollbar initial position
* - IE11 inverts both scrollbar position and scrolling offset
* Directly inspired by @KingSora's OverlayScrollbars https://github.com/KingSora/OverlayScrollbars/blob/master/js/OverlayScrollbars.js#L1634
*/

_createClass(SimpleBar, [{
key: "init",
value: function init() {
// Save a reference to the instance, so we know this DOM node has already been instancied
this.el.SimpleBar = this; // We stop here on server-side

if (canUseDom) {
this.initDOM();
this.scrollbarWidth = scrollbarWidth();
this.recalculate();
this.initListeners();
}
}
}, {
key: "initDOM",
value: function initDOM() {
var _this2 = this;

// make sure this element doesn't have the elements yet
if (Array.from(this.el.children).filter(function (child) {
return child.classList.contains(_this2.classNames.wrapper);
}).length) {
// assume that element has his DOM already initiated
this.wrapperEl = this.el.querySelector(".".concat(this.classNames.wrapper));
this.contentEl = this.el.querySelector(".".concat(this.classNames.content));
this.offsetEl = this.el.querySelector(".".concat(this.classNames.offset));
this.maskEl = this.el.querySelector(".".concat(this.classNames.mask));
this.placeholderEl = this.el.querySelector(".".concat(this.classNames.placeholder));
this.heightAutoObserverWrapperEl = this.el.querySelector(".".concat(this.classNames.heightAutoObserverWrapperEl));
this.heightAutoObserverEl = this.el.querySelector(".".concat(this.classNames.heightAutoObserverEl));
this.axis.x.track.el = this.el.querySelector(".".concat(this.classNames.track, ".").concat(this.classNames.horizontal));
this.axis.y.track.el = this.el.querySelector(".".concat(this.classNames.track, ".").concat(this.classNames.vertical));
} else {
// Prepare DOM
this.wrapperEl = document.createElement('div');
this.contentEl = document.createElement('div');
this.offsetEl = document.createElement('div');
this.maskEl = document.createElement('div');
this.placeholderEl = document.createElement('div');
this.heightAutoObserverWrapperEl = document.createElement('div');
this.heightAutoObserverEl = document.createElement('div');
this.wrapperEl.classList.add(this.classNames.wrapper);
this.contentEl.classList.add(this.classNames.content);
this.offsetEl.classList.add(this.classNames.offset);
this.maskEl.classList.add(this.classNames.mask);
this.placeholderEl.classList.add(this.classNames.placeholder);
this.heightAutoObserverWrapperEl.classList.add(this.classNames.heightAutoObserverWrapperEl);
this.heightAutoObserverEl.classList.add(this.classNames.heightAutoObserverEl);

while (this.el.firstChild) {
this.contentEl.appendChild(this.el.firstChild);
}

this.offsetEl.appendChild(this.contentEl);
this.maskEl.appendChild(this.offsetEl);
this.heightAutoObserverWrapperEl.appendChild(this.heightAutoObserverEl);
this.wrapperEl.appendChild(this.heightAutoObserverWrapperEl);
this.wrapperEl.appendChild(this.maskEl);
this.wrapperEl.appendChild(this.placeholderEl);
this.el.appendChild(this.wrapperEl);
}

if (!this.axis.x.track.el || !this.axis.y.track.el) {
var track = document.createElement('div');
var scrollbar = document.createElement('div');
track.classList.add(this.classNames.track);
scrollbar.classList.add(this.classNames.scrollbar);

if (!this.options.autoHide) {
scrollbar.classList.add(this.classNames.visible);
}

track.appendChild(scrollbar);
this.axis.x.track.el = track.cloneNode(true);
this.axis.x.track.el.classList.add(this.classNames.horizontal);
this.axis.y.track.el = track.cloneNode(true);
this.axis.y.track.el.classList.add(this.classNames.vertical);
this.el.appendChild(this.axis.x.track.el);
this.el.appendChild(this.axis.y.track.el);
}

this.axis.x.scrollbar.el = this.axis.x.track.el.querySelector(".".concat(this.classNames.scrollbar));
this.axis.y.scrollbar.el = this.axis.y.track.el.querySelector(".".concat(this.classNames.scrollbar));
this.el.setAttribute('data-simplebar', 'init');
}
}, {
key: "initListeners",
value: function initListeners() {
var _this3 = this;

// Event listeners
if (this.options.autoHide) {
this.el.addEventListener('mouseenter', this.onMouseEnter);
}

['mousedown', 'click', 'dblclick', 'touchstart', 'touchend', 'touchmove'].forEach(function (e) {
_this3.el.addEventListener(e, _this3.onPointerEvent, true);
});
this.el.addEventListener('mousemove', this.onMouseMove);
this.el.addEventListener('mouseleave', this.onMouseLeave);
this.contentEl.addEventListener('scroll', this.onScroll); // Browser zoom triggers a window resize

window.addEventListener('resize', this.onWindowResize); // MutationObserver is IE11+

if (typeof MutationObserver !== 'undefined') {
// create an observer instance
this.mutationObserver = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
if (mutation.target === _this3.el || !_this3.isChildNode(mutation.target) || mutation.addedNodes.length || mutation.removedNodes.length) {
_this3.recalculate();
}
});
}); // pass in the target node, as well as the observer options

this.mutationObserver.observe(this.el, {
attributes: true,
childList: true,
characterData: true,
subtree: true
});
}

this.resizeObserver = new index(this.recalculate);
this.resizeObserver.observe(this.el);
}
}, {
key: "recalculate",
value: function recalculate() {
var isHeightAuto = this.heightAutoObserverEl.offsetHeight <= 1;
this.elStyles = window.getComputedStyle(this.el);
this.isRtl = this.elStyles.direction === 'rtl';
this.contentEl.style.padding = "".concat(this.elStyles.paddingTop, " ").concat(this.elStyles.paddingRight, " ").concat(this.elStyles.paddingBottom, " ").concat(this.elStyles.paddingLeft);
this.contentEl.style.height = isHeightAuto ? 'auto' : '100%';
this.placeholderEl.style.width = "".concat(this.contentEl.scrollWidth, "px");
this.placeholderEl.style.height = "".concat(this.contentEl.scrollHeight, "px");
this.wrapperEl.style.margin = "-".concat(this.elStyles.paddingTop, " -").concat(this.elStyles.paddingRight, " -").concat(this.elStyles.paddingBottom, " -").concat(this.elStyles.paddingLeft);
this.axis.x.track.rect = this.axis.x.track.el.getBoundingClientRect();
this.axis.y.track.rect = this.axis.y.track.el.getBoundingClientRect(); // Set isOverflowing to false if scrollbar is not necessary (content is shorter than offset)

this.axis.x.isOverflowing = (this.scrollbarWidth ? this.contentEl.scrollWidth : this.contentEl.scrollWidth - this.minScrollbarWidth) > Math.ceil(this.axis.x.track.rect.width);
this.axis.y.isOverflowing = (this.scrollbarWidth ? this.contentEl.scrollHeight : this.contentEl.scrollHeight - this.minScrollbarWidth) > Math.ceil(this.axis.y.track.rect.height); // Set isOverflowing to false if user explicitely set hidden overflow

this.axis.x.isOverflowing = this.elStyles.overflowX === 'hidden' ? false : this.axis.x.isOverflowing;
this.axis.y.isOverflowing = this.elStyles.overflowY === 'hidden' ? false : this.axis.y.isOverflowing;
this.axis.x.forceVisible = this.options.forceVisible === "x" || this.options.forceVisible === true;
this.axis.y.forceVisible = this.options.forceVisible === "y" || this.options.forceVisible === true;
this.axis.x.scrollbar.size = this.getScrollbarSize('x');
this.axis.y.scrollbar.size = this.getScrollbarSize('y');
this.axis.x.scrollbar.el.style.width = "".concat(this.axis.x.scrollbar.size, "px");
this.axis.y.scrollbar.el.style.height = "".concat(this.axis.y.scrollbar.size, "px");
this.positionScrollbar('x');
this.positionScrollbar('y');
this.toggleTrackVisibility('x');
this.toggleTrackVisibility('y');
this.hideNativeScrollbar();
}
/**
* Calculate scrollbar size
*/

}, {
key: "getScrollbarSize",
value: function getScrollbarSize() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
var contentSize = this.scrollbarWidth ? this.contentEl[this.axis[axis].scrollSizeAttr] : this.contentEl[this.axis[axis].scrollSizeAttr] - this.minScrollbarWidth;
var trackSize = this.axis[axis].track.rect[this.axis[axis].sizeAttr];
var scrollbarSize;

if (!this.axis[axis].isOverflowing) {
return;
}

var scrollbarRatio = trackSize / contentSize; // Calculate new height/position of drag handle.

scrollbarSize = Math.max(~~(scrollbarRatio * trackSize), this.options.scrollbarMinSize);

if (this.options.scrollbarMaxSize) {
scrollbarSize = Math.min(scrollbarSize, this.options.scrollbarMaxSize);
}

return scrollbarSize;
}
}, {
key: "positionScrollbar",
value: function positionScrollbar() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
var contentSize = this.contentEl[this.axis[axis].scrollSizeAttr];
var trackSize = this.axis[axis].track.rect[this.axis[axis].sizeAttr];
var hostSize = parseInt(this.elStyles[this.axis[axis].sizeAttr], 10);
var scrollbar = this.axis[axis].scrollbar;
var scrollOffset = this.contentEl[this.axis[axis].scrollOffsetAttr];
scrollOffset = axis === 'x' && this.isRtl && SimpleBar.getRtlHelpers().isRtlScrollingInverted ? -scrollOffset : scrollOffset;
var scrollPourcent = scrollOffset / (contentSize - hostSize);
var handleOffset = ~~((trackSize - scrollbar.size) * scrollPourcent);
handleOffset = axis === 'x' && this.isRtl && SimpleBar.getRtlHelpers().isRtlScrollbarInverted ? handleOffset + (trackSize - scrollbar.size) : handleOffset;
scrollbar.el.style.transform = axis === 'x' ? "translate3d(".concat(handleOffset, "px, 0, 0)") : "translate3d(0, ".concat(handleOffset, "px, 0)");
}
}, {
key: "toggleTrackVisibility",
value: function toggleTrackVisibility() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
var track = this.axis[axis].track.el;
var scrollbar = this.axis[axis].scrollbar.el;

if (this.axis[axis].isOverflowing || this.axis[axis].forceVisible) {
track.style.visibility = 'visible';
this.contentEl.style[this.axis[axis].overflowAttr] = 'scroll';
} else {
track.style.visibility = 'hidden';
this.contentEl.style[this.axis[axis].overflowAttr] = 'hidden';
} // Even if forceVisible is enabled, scrollbar itself should be hidden

if (this.axis[axis].isOverflowing) {
scrollbar.style.visibility = 'visible';
} else {
scrollbar.style.visibility = 'hidden';
}
}
}, {
key: "hideNativeScrollbar",
value: function hideNativeScrollbar() {
this.offsetEl.style[this.isRtl ? 'left' : 'right'] = this.axis.y.isOverflowing || this.axis.y.forceVisible ? "-".concat(this.scrollbarWidth || this.minScrollbarWidth, "px") : 0;
this.offsetEl.style.bottom = this.axis.x.isOverflowing || this.axis.x.forceVisible ? "-".concat(this.scrollbarWidth || this.minScrollbarWidth, "px") : 0; // If floating scrollbar

if (!this.scrollbarWidth) {
var paddingDirection = [this.isRtl ? 'paddingLeft' : 'paddingRight'];
this.contentEl.style[paddingDirection] = this.axis.y.isOverflowing || this.axis.y.forceVisible ? "calc(".concat(this.elStyles[paddingDirection], " + ").concat(this.minScrollbarWidth, "px)") : this.elStyles[paddingDirection];
this.contentEl.style.paddingBottom = this.axis.x.isOverflowing || this.axis.x.forceVisible ? "calc(".concat(this.elStyles.paddingBottom, " + ").concat(this.minScrollbarWidth, "px)") : this.elStyles.paddingBottom;
}
}
/**
* On scroll event handling
*/

}, {
key: "onMouseMoveForAxis",
value: function onMouseMoveForAxis() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
this.axis[axis].track.rect = this.axis[axis].track.el.getBoundingClientRect();
this.axis[axis].scrollbar.rect = this.axis[axis].scrollbar.el.getBoundingClientRect();
var isWithinScrollbarBoundsX = this.isWithinBounds(this.axis[axis].scrollbar.rect);

if (isWithinScrollbarBoundsX) {
this.axis[axis].scrollbar.el.classList.add(this.classNames.hover);
} else {
this.axis[axis].scrollbar.el.classList.remove(this.classNames.hover);
}

if (this.isWithinBounds(this.axis[axis].track.rect)) {
this.showScrollbar(axis);
this.axis[axis].track.el.classList.add(this.classNames.hover);
} else {
this.axis[axis].track.el.classList.remove(this.classNames.hover);
}
}
}, {
key: "onMouseLeaveForAxis",
value: function onMouseLeaveForAxis() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
this.axis[axis].track.el.classList.remove(this.classNames.hover);
this.axis[axis].scrollbar.el.classList.remove(this.classNames.hover);
}
}, {
key: "showScrollbar",

/**
* Show scrollbar
*/
value: function showScrollbar() {
var axis = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'y';
var scrollbar = this.axis[axis].scrollbar.el;

if (!this.axis[axis].isVisible) {
scrollbar.classList.add(this.classNames.visible);
this.axis[axis].isVisible = true;
}

if (this.options.autoHide) {
this.hideScrollbars();
}
}
/**
* Hide Scrollbar
*/

}, {
key: "onDragStart",

/**
* on scrollbar handle drag movement starts
*/
value: function onDragStart(e) {
var axis = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'y';
var scrollbar = this.axis[axis].scrollbar.el; // Measure how far the user's mouse is from the top of the scrollbar drag handle.

var eventOffset = axis === 'y' ? e.pageY : e.pageX;
this.axis[axis].dragOffset = eventOffset - scrollbar.getBoundingClientRect()[this.axis[axis].offsetAttr];
this.draggedAxis = axis;
document.addEventListener('mousemove', this.drag);
document.addEventListener('mouseup', this.onEndDrag);
}
/**
* Drag scrollbar handle
*/

}, {
key: "getScrollElement",

/**
* Getter for original scrolling element
*/
value: function getScrollElement() {
return this.contentEl;
}
}, {
key: "removeListeners",
value: function removeListeners() {
var _this4 = this;

// Event listeners
if (this.options.autoHide) {
this.el.removeEventListener('mouseenter', this.onMouseEnter);
}

['mousedown', 'click', 'dblclick', 'touchstart', 'touchend', 'touchmove'].forEach(function (e) {
_this4.el.removeEventListener(e, _this4.onPointerEvent);
});
this.el.removeEventListener('mousemove', this.onMouseMove);
this.el.removeEventListener('mouseleave', this.onMouseLeave);
this.contentEl.removeEventListener('scroll', this.onScroll);
window.removeEventListener('resize', this.onWindowResize);
this.mutationObserver && this.mutationObserver.disconnect();
this.resizeObserver.disconnect(); // Cancel all debounced functions

this.recalculate.cancel();
this.onMouseMove.cancel();
this.hideScrollbars.cancel();
this.onWindowResize.cancel();
}
/**
* UnMount mutation observer and delete SimpleBar instance from DOM element
*/

}, {
key: "unMount",
value: function unMount() {
this.removeListeners();
this.el.SimpleBar = null;
}
/**
* Recursively walks up the parent nodes looking for this.el
*/

}, {
key: "isChildNode",
value: function isChildNode(el) {
if (el === null) return false;
if (el === this.el) return true;
return this.isChildNode(el.parentNode);
}
/**
* Check if mouse is within bounds
*/

}, {
key: "isWithinBounds",
value: function isWithinBounds(bbox) {
return this.mouseX >= bbox.left && this.mouseX <= bbox.left + bbox.width && this.mouseY >= bbox.top && this.mouseY <= bbox.top + bbox.height;
}
}], [{
key: "getRtlHelpers",
value: function getRtlHelpers() {
var dummyDiv = document.createElement('div');
dummyDiv.innerHTML = '<div class="hs-dummy-scrollbar-size"><div style="height: 200%; width: 200%; margin: 10px 0;"></div></div>';
var scrollbarDummyEl = dummyDiv.firstElementChild;
document.body.appendChild(scrollbarDummyEl);
var dummyContainerChild = scrollbarDummyEl.firstElementChild;
scrollbarDummyEl.scrollLeft = 0;
var dummyContainerOffset = SimpleBar.getOffset(scrollbarDummyEl);
var dummyContainerChildOffset = SimpleBar.getOffset(dummyContainerChild);
scrollbarDummyEl.scrollLeft = 999;
var dummyContainerScrollOffsetAfterScroll = SimpleBar.getOffset(dummyContainerChild);
return {
// determines if the scrolling is responding with negative values
isRtlScrollingInverted: dummyContainerOffset.left !== dummyContainerChildOffset.left && dummyContainerChildOffset.left - dummyContainerScrollOffsetAfterScroll.left !== 0,
// determines if the origin scrollbar position is inverted or not (positioned on left or right)
isRtlScrollbarInverted: dummyContainerOffset.left !== dummyContainerChildOffset.left
};
}
}, {
key: "initHtmlApi",
value: function initHtmlApi() {
this.initDOMLoadedElements = this.initDOMLoadedElements.bind(this); // MutationObserver is IE11+

if (typeof MutationObserver !== 'undefined') {
// Mutation observer to observe dynamically added elements
this.globalObserver = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
Array.from(mutation.addedNodes).forEach(function (addedNode) {
if (addedNode.nodeType === 1) {
if (addedNode.hasAttribute('data-simplebar')) {
!addedNode.SimpleBar && new SimpleBar(addedNode, SimpleBar.getElOptions(addedNode));
} else {
Array.from(addedNode.querySelectorAll('[data-simplebar]')).forEach(function (el) {
!el.SimpleBar && new SimpleBar(el, SimpleBar.getElOptions(el));
});
}
}
});
Array.from(mutation.removedNodes).forEach(function (removedNode) {
if (removedNode.nodeType === 1) {
if (removedNode.hasAttribute('data-simplebar')) {
removedNode.SimpleBar && removedNode.SimpleBar.unMount();
} else {
Array.from(removedNode.querySelectorAll('[data-simplebar]')).forEach(function (el) {
el.SimpleBar && el.SimpleBar.unMount();
});
}
}
});
});
});
this.globalObserver.observe(document, {
childList: true,
subtree: true
});
} // Taken from jQuery `ready` function
// Instantiate elements already present on the page

if (document.readyState === 'complete' || document.readyState !== 'loading' && !document.documentElement.doScroll) {
// Handle it asynchronously to allow scripts the opportunity to delay init
window.setTimeout(this.initDOMLoadedElements);
} else {
document.addEventListener('DOMContentLoaded', this.initDOMLoadedElements);
window.addEventListener('load', this.initDOMLoadedElements);
}
} // Helper function to retrieve options from element attributes

}, {
key: "getElOptions",
value: function getElOptions(el) {
var options = Array.from(el.attributes).reduce(function (acc, attribute) {
var option = attribute.name.match(/data-simplebar-(.+)/);

if (option) {
var key = option[1].replace(/\W+(.)/g, function (x, chr) {
return chr.toUpperCase();
});

switch (attribute.value) {
case 'true':
acc[key] = true;
break;

case 'false':
acc[key] = false;
break;

case undefined:
acc[key] = true;
break;

default:
acc[key] = attribute.value;
}
}

return acc;
}, {});
return options;
}
}, {
key: "removeObserver",
value: function removeObserver() {
this.globalObserver.disconnect();
}
}, {
key: "initDOMLoadedElements",
value: function initDOMLoadedElements() {
document.removeEventListener('DOMContentLoaded', this.initDOMLoadedElements);
window.removeEventListener('load', this.initDOMLoadedElements);
Array.from(document.querySelectorAll('[data-simplebar]')).forEach(function (el) {
if (!el.SimpleBar) new SimpleBar(el, SimpleBar.getElOptions(el));
});
}
}, {
key: "getOffset",
value: function getOffset(el) {
var rect = el.getBoundingClientRect();
return {
top: rect.top + (window.pageYOffset || document.documentElement.scrollTop),
left: rect.left + (window.pageXOffset || document.documentElement.scrollLeft)
};
}
}]);

return SimpleBar;
}();
/**
* HTML API
* Called only in a browser env.
*/

SimpleBar.defaultOptions = {
autoHide: true,
forceVisible: false,
classNames: {
content: 'simplebar-content',
offset: 'simplebar-offset',
mask: 'simplebar-mask',
wrapper: 'simplebar-wrapper',
placeholder: 'simplebar-placeholder',
scrollbar: 'simplebar-scrollbar',
track: 'simplebar-track',
heightAutoObserverWrapperEl: 'simplebar-height-auto-observer-wrapper',
heightAutoObserverEl: 'simplebar-height-auto-observer',
visible: 'simplebar-visible',
horizontal: 'simplebar-horizontal',
vertical: 'simplebar-vertical',
hover: 'simplebar-hover'
},
scrollbarMinSize: 25,
scrollbarMaxSize: 0,
timeout: 1000
};

if (canUseDom) {
SimpleBar.initHtmlApi();
}

return SimpleBar;

}));