/**

* gridstack.js 0.5.3-dev

* https://gridstackjs.com/

* (c) 2019 Dylan Weiss, Alain Dumesny, Pavel Reznikov

* gridstack.js may be freely distributed under the MIT license.

* @preserve

*/

// IE and older browsers Polyfills for this library

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN

Number.isNaN = Number.isNaN || function isNaN(input) {

return typeof input === 'number' && input !== input;

}

// https://tc39.github.io/ecma262/#sec-array.prototype.find

if (!Array.prototype.find) {

Object.defineProperty(Array.prototype, 'find', {

value: function (predicate) {

// 1. Let O be ? ToObject(this value).

if (this == null) {

throw TypeError('"this" is null or not defined');

}

var o = Object(this);

// 2. Let len be ? ToLength(? Get(O, "length")).

var len = o.length >>> 0;

// 3. If IsCallable(predicate) is false, throw a TypeError exception.

if (typeof predicate !== 'function') {

throw TypeError('predicate must be a function');

}

// 4. If thisArg was supplied, let T be thisArg; else let T be undefined.

var thisArg = arguments[1];

// 5. Let k be 0.

var k = 0;

// 6. Repeat, while k < len

while (k < len) {

// a. Let Pk be ! ToString(k).

// b. Let kValue be ? Get(O, Pk).

// c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).

// d. If testResult is true, return kValue.

var kValue = o[k];

if (predicate.call(thisArg, kValue, k, o)) {

return kValue;

}

// e. Increase k by 1.

k++;

}

// 7. Return undefined.

return undefined;

},

configurable: true,

writable: true

});

}