// gridstack-poly.js 2.0.0 @preserve

/** IE and older browsers Polyfills for this library

* https://gridstackjs.com/

* (c) 2019-2020 Alain Dumesny

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

*/

/* eslint-disable prefer-rest-params */

/* eslint-disable no-var */

// https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent/CustomEvent

(function () {

if (typeof window.CustomEvent === "function") {

return false;

}

function CustomEvent (event, params) {

params = params || {bubbles: false, cancelable: false, detail: null};

var evt = document.createEvent('CustomEvent');

evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);

return evt;

}

window.CustomEvent = CustomEvent;

})();

// 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://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/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

});

}

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex

if (!Array.prototype.findIndex) {

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

value: function(predicate) {

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

if (this == null) {

throw new 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 new 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 k.

var kValue = o[k];

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

return k;

}

// e. Increase k by 1.

k++;

}

// 7. Return -1.

return -1;

},

configurable: true,

writable: true

});

}

// Source: https://github.com/jserz/js_piece/blob/master/DOM/ParentNode/append()/append().md

(function (arr) {

arr.forEach(function (item) {

if (item.hasOwnProperty('append')) {

return;

}

Object.defineProperty(item, 'append', {

configurable: true,

enumerable: true,

writable: true,

value: function append() {

var argArr = Array.prototype.slice.call(arguments),

docFrag = document.createDocumentFragment();

argArr.forEach(function (argItem) {

var isNode = argItem instanceof Node;

docFrag.appendChild(isNode ? argItem : document.createTextNode(String(argItem)));

});

this.appendChild(docFrag);

}

});

});

})([Element.prototype, Document.prototype, DocumentFragment.prototype]);

// Production steps of ECMA-262, Edition 5, 15.4.4.18

// Reference: http://es5.github.io/#x15.4.4.18

if (!Array.prototype['forEach']) {

Array.prototype.forEach = function(callback, thisArg) {

if (this == null) { throw new TypeError('Array.prototype.forEach called on null or undefined'); }

var T, k;

// 1. Let O be the result of calling toObject() passing the

// |this| value as the argument.

var O = Object(this);

// 2. Let lenValue be the result of calling the Get() internal

// method of O with the argument "length".

// 3. Let len be toUint32(lenValue).

var len = O.length >>> 0;

// 4. If isCallable(callback) is false, throw a TypeError exception.

// See: http://es5.github.com/#x9.11

if (typeof callback !== "function") { throw new TypeError(callback + ' is not a function'); }

// 5. If thisArg was supplied, let T be thisArg; else let

// T be undefined.

if (arguments.length > 1) { T = thisArg; }

// 6. Let k be 0

k = 0;

// 7. Repeat, while k < len

while (k < len) {

var kValue;

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

// This is implicit for LHS operands of the in operator

// b. Let kPresent be the result of calling the HasProperty

// internal method of O with argument Pk.

// This step can be combined with c

// c. If kPresent is true, then

if (k in O) {

// i. Let kValue be the result of calling the Get internal

// method of O with argument Pk.

kValue = O[k];

// ii. Call the Call internal method of callback with T as

// the this value and argument list containing kValue, k, and O.

callback.call(T, kValue, k, O);

}

// d. Increase k by 1.

k++;

}

// 8. return undefined

};

}