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/**
* Polyfill service v3.13.0
* For detailed credits and licence information see
http://github.com/financial-times/polyfill-service.
*
* Features requested: Element.prototype.classList
*
* - Object.defineProperty, License: CC0 (required by
"Element.prototype.classList")
* - _DOMTokenList, License: CC0 (required by
"Element.prototype.classList")
* - Document, License: CC0 (required by "Element",
"Element.prototype.classList")
* - Element, License: CC0 (required by
"Element.prototype.classList")
* - Element.prototype.classList, License: CC0
*
* @build
https://cdn.polyfill.io/v2/polyfill.js?features=Element.prototype.classList&flags=always,gated
*
* @copyright Copyright (c) 2016 Financial Times
* @license MIT License,
https://github.com/Financial-Times/polyfill-service/blob/master/LICENSE.md
*/
(function(undefined) {
if (!(// In IE8, defineProperty could only act on DOM elements, so full
support
// for the feature requires the ability to set a property on an arbitrary
object
'defineProperty' in Object && (function() {
try {
var a = {};
Object.defineProperty(a, 'test', {value:42});
return true;
} catch(e) {
return false
}
}()))) {
// Object.defineProperty
(function (nativeDefineProperty) {
var supportsAccessors =
Object.prototype.hasOwnProperty('__defineGetter__');
var ERR_ACCESSORS_NOT_SUPPORTED = 'Getters & setters cannot be
defined on this javascript engine';
var ERR_VALUE_ACCESSORS = 'A property cannot both have accessors and
be writable or have a value';
Object.defineProperty = function defineProperty(object, property,
descriptor) {
// Where native support exists, assume it
if (nativeDefineProperty && (object === window || object ===
document || object === Element.prototype || object instanceof Element)) {
return nativeDefineProperty(object, property, descriptor);
}
if (object === null || !(object instanceof Object || typeof object ===
'object')) {
throw new TypeError('Object must be an object
(Object.defineProperty polyfill)');
}
if (!(descriptor instanceof Object)) {
throw new TypeError('Descriptor must be an object
(Object.defineProperty polyfill)');
}
var propertyString = String(property);
var hasValueOrWritable = 'value' in descriptor ||
'writable' in descriptor;
var getterType = 'get' in descriptor && typeof
descriptor.get;
var setterType = 'set' in descriptor && typeof
descriptor.set;
// handle descriptor.get
if (getterType) {
if (getterType !== 'function') {
throw new TypeError('Getter expected a function
(Object.defineProperty polyfill)');
}
if (!supportsAccessors) {
throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
}
if (hasValueOrWritable) {
throw new TypeError(ERR_VALUE_ACCESSORS);
}
object.__defineGetter__(propertyString, descriptor.get);
} else {
object[propertyString] = descriptor.value;
}
// handle descriptor.set
if (setterType) {
if (setterType !== 'function') {
throw new TypeError('Setter expected a function
(Object.defineProperty polyfill)');
}
if (!supportsAccessors) {
throw new TypeError(ERR_ACCESSORS_NOT_SUPPORTED);
}
if (hasValueOrWritable) {
throw new TypeError(ERR_VALUE_ACCESSORS);
}
object.__defineSetter__(propertyString, descriptor.set);
}
// OK to define value unconditionally - if a getter has been specified as
well, an error would be thrown above
if ('value' in descriptor) {
object[propertyString] = descriptor.value;
}
return object;
};
}(Object.defineProperty));
}
// _DOMTokenList
var _DOMTokenList = (function () { // eslint-disable-line no-unused-vars
function tokenize(token) {
if (/^-?[_a-zA-Z]+[_a-zA-Z0-9-]*$/.test(token)) {
return String(token);
} else {
throw new Error('InvalidCharacterError: DOM Exception 5');
}
}
function toObject(self) {
for (var index = -1, object = {}, element; element = self[++index];) {
object[element] = true;
}
return object;
}
function fromObject(self, object) {
var array = [], token;
for (token in object) {
if (object[token]) {
array.push(token);
}
}
[].splice.apply(self, [0, self.length].concat(array));
}
var DTL = function() {};
DTL.prototype = {
constructor: DTL,
item: function item(index) {
return this[parseFloat(index)] || null;
},
length: Array.prototype.length,
toString: function toString() {
return [].join.call(this, ' ');
},
add: function add() {
for (var object = toObject(this), index = 0, token; index in arguments;
++index) {
token = tokenize(arguments[index]);
object[token] = true;
}
fromObject(this, object);
},
contains: function contains(token) {
return token in toObject(this);
},
remove: function remove() {
for (var object = toObject(this), index = 0, token; index in arguments;
++index) {
token = tokenize(arguments[index]);
object[token] = false;
}
fromObject(this, object);
},
toggle: function toggle(token) {
var
object = toObject(this),
contains = 1 in arguments ? !arguments[1] : tokenize(token) in object;
object[token] = !contains;
fromObject(this, object);
return !contains;
}
};
return DTL;
}());
if (!("Document" in this)) {
// Document
if (this.HTMLDocument) { // IE8
// HTMLDocument is an extension of Document. If the browser has
HTMLDocument but not Document, the former will suffice as an alias for the
latter.
this.Document = this.HTMLDocument;
} else {
// Create an empty function to act as the missing constructor for the
document object, attach the document object as its prototype. The function
needs to be anonymous else it is hoisted and causes the feature detect to
prematurely pass, preventing the assignments below being made.
this.Document = this.HTMLDocument = document.constructor = (new
Function('return function Document() {}')());
this.Document.prototype = document;
}
}
if (!('Element' in this && 'HTMLElement' in
this)) {
// Element
(function () {
// IE8
if (window.Element && !window.HTMLElement) {
window.HTMLElement = window.Element;
return;
}
// create Element constructor
window.Element = window.HTMLElement = new Function('return function
Element() {}')();
// generate sandboxed iframe
var vbody =
document.appendChild(document.createElement('body'));
var frame = vbody.appendChild(document.createElement('iframe'));
// use sandboxed iframe to replicate Element functionality
var frameDocument = frame.contentWindow.document;
var prototype = Element.prototype =
frameDocument.appendChild(frameDocument.createElement('*'));
var cache = {};
// polyfill Element.prototype on an element
var shiv = function (element, deep) {
var
childNodes = element.childNodes || [],
index = -1,
key, value, childNode;
if (element.nodeType === 1 && element.constructor !== Element) {
element.constructor = Element;
for (key in cache) {
value = cache[key];
element[key] = value;
}
}
while (childNode = deep && childNodes[++index]) {
shiv(childNode, deep);
}
return element;
};
var elements = document.getElementsByTagName('*');
var nativeCreateElement = document.createElement;
var interval;
var loopLimit = 100;
prototype.attachEvent('onpropertychange', function (event) {
var
propertyName = event.propertyName,
nonValue = !cache.hasOwnProperty(propertyName),
newValue = prototype[propertyName],
oldValue = cache[propertyName],
index = -1,
element;
while (element = elements[++index]) {
if (element.nodeType === 1) {
if (nonValue || element[propertyName] === oldValue) {
element[propertyName] = newValue;
}
}
}
cache[propertyName] = newValue;
});
prototype.constructor = Element;
if (!prototype.hasAttribute) {
// <Element>.hasAttribute
prototype.hasAttribute = function hasAttribute(name) {
return this.getAttribute(name) !== null;
};
}
// Apply Element prototype to the pre-existing DOM as soon as the body
element appears.
function bodyCheck() {
if (!(loopLimit--)) clearTimeout(interval);
if (document.body && !document.body.prototype &&
/(complete|interactive)/.test(document.readyState)) {
shiv(document, true);
if (interval && document.body.prototype) clearTimeout(interval);
return (!!document.body.prototype);
}
return false;
}
if (!bodyCheck(true)) {
document.onreadystatechange = bodyCheck;
interval = setInterval(bodyCheck, 25);
}
// Apply to any new elements created after load
document.createElement = function createElement(nodeName) {
var element = nativeCreateElement(String(nodeName).toLowerCase());
return shiv(element);
};
// remove sandboxed iframe
document.removeChild(vbody);
}());
}
if (!('document' in this && "classList" in
document.documentElement)) {
// Element.prototype.classList
Object.defineProperty(Element.prototype, 'classList', {
configurable: true,
get: function () {
function pull() {
var className = (typeof element.className === "object" ?
element.className.baseVal : element.className);
[].splice.apply(classList, [0, classList.length].concat((className ||
'').replace(/^\s+|\s+$/g, '').split(/\s+/)));
}
function push() {
if (element.attachEvent) {
element.detachEvent('onpropertychange', pull);
}
if (typeof element.className === "object") {
element.className.baseVal = original.toString.call(classList);
} else {
element.className = original.toString.call(classList);
}
if (element.attachEvent) {
element.attachEvent('onpropertychange', pull);
}
}
var element = this;
var original = _DOMTokenList.prototype;
var ClassList = function ClassList() {};
var classList;
ClassList.prototype = new _DOMTokenList;
ClassList.prototype.item = function item(index) { // eslint-disable-line
no-unused-vars
return pull(), original.item.apply(classList, arguments);
};
ClassList.prototype.toString = function toString() {
return pull(), original.toString.apply(classList, arguments);
};
ClassList.prototype.add = function add() {
return pull(), original.add.apply(classList, arguments), push();
};
ClassList.prototype.contains = function contains(token) { //
eslint-disable-line no-unused-vars
return pull(), original.contains.apply(classList, arguments);
};
ClassList.prototype.remove = function remove() {
return pull(), original.remove.apply(classList, arguments), push();
};
ClassList.prototype.toggle = function toggle(token) {
return pull(), token = original.toggle.apply(classList, arguments),
push(), token;
};
classList = new ClassList;
if (element.attachEvent) {
element.attachEvent('onpropertychange', pull);
}
return classList;
}
});
}
})
.call('object' === typeof window && window ||
'object' === typeof self && self || 'object'
=== typeof global && global || {});