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* modernizr v3.13.1\n * Build https://modernizr.com/download?-arrow-checked-hidden-json-regions-svg-video-addtest-fnbind-printshiv-setclasses-testprop-dontmin\n *\n * Copyright (c)\n * Faruk Ates\n * Paul Irish\n * Alex Sexton\n * Ryan Seddon\n * Patrick Kettner\n * Stu Cox\n * Richard Herrera\n * Veeck\n\n * MIT License\n */\n\n/*\n * Modernizr tests which native CSS3 and HTML5 features are available in the\n * current UA and makes the results available to you in two ways: as properties on\n * a global `Modernizr` object, and as classes on the `` element. This\n * information allows you to progressively enhance your pages with a granular level\n * of control over the experience.\n*/\n\n;(function(scriptGlobalObject, window, document, undefined){\n\n var tests = [];\n \n\n /**\n * ModernizrProto is the constructor for Modernizr\n *\n * @class\n * @access public\n */\n var ModernizrProto = {\n _version: '3.13.1',\n\n // Any settings that don't work as separate modules\n // can go in here as configuration.\n _config: {\n 'classPrefix': '',\n 'enableClasses': true,\n 'enableJSClass': true,\n 'usePrefixes': true\n },\n\n // Queue of tests\n _q: [],\n\n // Stub these for people who are listening\n on: function(test, cb) {\n // I don't really think people should do this, but we can\n // safe guard it a bit.\n // -- NOTE:: this gets WAY overridden in src/addTest for actual async tests.\n // This is in case people listen to synchronous tests. I would leave it out,\n // but the code to *disallow* sync tests in the real version of this\n // function is actually larger than this.\n var self = this;\n setTimeout(function() {\n cb(self[test]);\n }, 0);\n },\n\n addTest: function(name, fn, options) {\n tests.push({name: name, fn: fn, options: options});\n },\n\n addAsyncTest: function(fn) {\n tests.push({name: null, fn: fn});\n }\n };\n\n \n\n // Fake some of Object.create so we can force non test results to be non \"own\" properties.\n var Modernizr = function() {};\n Modernizr.prototype = ModernizrProto;\n\n // Leak modernizr globally when you `require` it rather than force it here.\n // Overwrite name so constructor name is nicer :D\n Modernizr = new Modernizr();\n\n \n\n var classes = [];\n \n\n /**\n * is returns a boolean if the typeof an obj is exactly type.\n *\n * @access private\n * @function is\n * @param {*} obj - A thing we want to check the type of\n * @param {string} type - A string to compare the typeof against\n * @returns {boolean} true if the typeof the first parameter is exactly the specified type, false otherwise\n */\n function is(obj, type) {\n return typeof obj === type;\n }\n\n ;\n\n /**\n * Run through all tests and detect their support in the current UA.\n *\n * @access private\n * @returns {void}\n */\n function testRunner() {\n var featureNames;\n var feature;\n var aliasIdx;\n var result;\n var nameIdx;\n var featureName;\n var featureNameSplit;\n\n for (var featureIdx in tests) {\n if (tests.hasOwnProperty(featureIdx)) {\n featureNames = [];\n feature = tests[featureIdx];\n // run the test, throw the return value into the Modernizr,\n // then based on that boolean, define an appropriate className\n // and push it into an array of classes we'll join later.\n //\n // If there is no name, it's an 'async' test that is run,\n // but not directly added to the object. That should\n // be done with a post-run addTest call.\n if (feature.name) {\n featureNames.push(feature.name.toLowerCase());\n\n if (feature.options && feature.options.aliases && feature.options.aliases.length) {\n // Add all the aliases into the names list\n for (aliasIdx = 0; aliasIdx < feature.options.aliases.length; aliasIdx++) {\n featureNames.push(feature.options.aliases[aliasIdx].toLowerCase());\n }\n }\n }\n\n // Run the test, or use the raw value if it's not a function\n result = is(feature.fn, 'function') ? feature.fn() : feature.fn;\n\n // Set each of the names on the Modernizr object\n for (nameIdx = 0; nameIdx < featureNames.length; nameIdx++) {\n featureName = featureNames[nameIdx];\n // Support dot properties as sub tests. We don't do checking to make sure\n // that the implied parent tests have been added. You must call them in\n // order (either in the test, or make the parent test a dependency).\n //\n // Cap it to TWO to make the logic simple and because who needs that kind of subtesting\n // hashtag famous last words\n featureNameSplit = featureName.split('.');\n\n if (featureNameSplit.length === 1) {\n Modernizr[featureNameSplit[0]] = result;\n } else {\n // cast to a Boolean, if not one already or if it doesnt exist yet (like inputtypes)\n if (!Modernizr[featureNameSplit[0]] || Modernizr[featureNameSplit[0]] && !(Modernizr[featureNameSplit[0]] instanceof Boolean)) {\n Modernizr[featureNameSplit[0]] = new Boolean(Modernizr[featureNameSplit[0]]);\n }\n\n Modernizr[featureNameSplit[0]][featureNameSplit[1]] = result;\n }\n\n classes.push((result ? '' : 'no-') + featureNameSplit.join('-'));\n }\n }\n }\n }\n ;\n\n /**\n * docElement is a convenience wrapper to grab the root element of the document\n *\n * @access private\n * @returns {HTMLElement|SVGElement} The root element of the document\n */\n var docElement = document.documentElement;\n \n\n /**\n * A convenience helper to check if the document we are running in is an SVG document\n *\n * @access private\n * @returns {boolean}\n */\n var isSVG = docElement.nodeName.toLowerCase() === 'svg';\n\n \n\n /**\n * setClasses takes an array of class names and adds them to the root element\n *\n * @access private\n * @function setClasses\n * @param {string[]} classes - Array of class names\n */\n // Pass in an and array of class names, e.g.:\n // ['no-webp', 'borderradius', ...]\n function setClasses(classes) {\n var className = docElement.className;\n var classPrefix = Modernizr._config.classPrefix || '';\n\n if (isSVG) {\n className = className.baseVal;\n }\n\n // Change `no-js` to `js` (independently of the `enableClasses` option)\n // Handle classPrefix on this too\n if (Modernizr._config.enableJSClass) {\n var reJS = new RegExp('(^|\\\\s)' + classPrefix + 'no-js(\\\\s|$)');\n className = className.replace(reJS, '$1' + classPrefix + 'js$2');\n }\n\n if (Modernizr._config.enableClasses) {\n // Add the new classes\n if (classes.length > 0) {\n className += ' ' + classPrefix + classes.join(' ' + classPrefix);\n }\n if (isSVG) {\n docElement.className.baseVal = className;\n } else {\n docElement.className = className;\n }\n }\n }\n\n ;\n\n /**\n * hasOwnProp is a shim for hasOwnProperty that is needed for Safari 2.0 support\n *\n * @author kangax\n * @access private\n * @function hasOwnProp\n * @param {object} object - The object to check for a property\n * @param {string} property - The property to check for\n * @returns {boolean}\n */\n\n // hasOwnProperty shim by kangax needed for Safari 2.0 support\n var hasOwnProp;\n\n (function() {\n var _hasOwnProperty = ({}).hasOwnProperty;\n /* istanbul ignore else */\n /* we have no way of testing IE 5.5 or safari 2,\n * so just assume the else gets hit */\n if (!is(_hasOwnProperty, 'undefined') && !is(_hasOwnProperty.call, 'undefined')) {\n hasOwnProp = function(object, property) {\n return _hasOwnProperty.call(object, property);\n };\n }\n else {\n hasOwnProp = function(object, property) { /* yes, this can give false positives/negatives, but most of the time we don't care about those */\n return ((property in object) && is(object.constructor.prototype[property], 'undefined'));\n };\n }\n })();\n\n \n\n\n // _l tracks listeners for async tests, as well as tests that execute after the initial run\n ModernizrProto._l = {};\n\n /**\n * Modernizr.on is a way to listen for the completion of async tests. Being\n * asynchronous, they may not finish before your scripts run. As a result you\n * will get a possibly false negative `undefined` value.\n *\n * @memberOf Modernizr\n * @name Modernizr.on\n * @access public\n * @function on\n * @param {string} feature - String name of the feature detect\n * @param {Function} cb - Callback function returning a Boolean - true if feature is supported, false if not\n * @returns {void}\n * @example\n *\n * ```js\n * Modernizr.on('flash', function( result ) {\n * if (result) {\n * // the browser has flash\n * } else {\n * // the browser does not have flash\n * }\n * });\n * ```\n */\n ModernizrProto.on = function(feature, cb) {\n // Create the list of listeners if it doesn't exist\n if (!this._l[feature]) {\n this._l[feature] = [];\n }\n\n // Push this test on to the listener list\n this._l[feature].push(cb);\n\n // If it's already been resolved, trigger it on next tick\n if (Modernizr.hasOwnProperty(feature)) {\n // Next Tick\n setTimeout(function() {\n Modernizr._trigger(feature, Modernizr[feature]);\n }, 0);\n }\n };\n\n /**\n * _trigger is the private function used to signal test completion and run any\n * callbacks registered through [Modernizr.on](#modernizr-on)\n *\n * @memberOf Modernizr\n * @name Modernizr._trigger\n * @access private\n * @function _trigger\n * @param {string} feature - string name of the feature detect\n * @param {Function|boolean} [res] - A feature detection function, or the boolean =\n * result of a feature detection function\n * @returns {void}\n */\n ModernizrProto._trigger = function(feature, res) {\n if (!this._l[feature]) {\n return;\n }\n\n var cbs = this._l[feature];\n\n // Force async\n setTimeout(function() {\n var i, cb;\n for (i = 0; i < cbs.length; i++) {\n cb = cbs[i];\n cb(res);\n }\n }, 0);\n\n // Don't trigger these again\n delete this._l[feature];\n };\n\n /**\n * addTest allows you to define your own feature detects that are not currently\n * included in Modernizr (under the covers it's the exact same code Modernizr\n * uses for its own [feature detections](https://github.com/Modernizr/Modernizr/tree/master/feature-detects)).\n * Just like the official detects, the result\n * will be added onto the Modernizr object, as well as an appropriate className set on\n * the html element when configured to do so\n *\n * @memberOf Modernizr\n * @name Modernizr.addTest\n * @optionName Modernizr.addTest()\n * @optionProp addTest\n * @access public\n * @function addTest\n * @param {string|object} feature - The string name of the feature detect, or an\n * object of feature detect names and test\n * @param {Function|boolean} test - Function returning true if feature is supported,\n * false if not. Otherwise a boolean representing the results of a feature detection\n * @returns {object} the Modernizr object to allow chaining\n * @example\n *\n * The most common way of creating your own feature detects is by calling\n * `Modernizr.addTest` with a string (preferably just lowercase, without any\n * punctuation), and a function you want executed that will return a boolean result\n *\n * ```js\n * Modernizr.addTest('itsTuesday', function() {\n * var d = new Date();\n * return d.getDay() === 2;\n * });\n * ```\n *\n * When the above is run, it will set Modernizr.itstuesday to `true` when it is tuesday,\n * and to `false` every other day of the week. One thing to notice is that the names of\n * feature detect functions are always lowercased when added to the Modernizr object. That\n * means that `Modernizr.itsTuesday` will not exist, but `Modernizr.itstuesday` will.\n *\n *\n * Since we only look at the returned value from any feature detection function,\n * you do not need to actually use a function. For simple detections, just passing\n * in a statement that will return a boolean value works just fine.\n *\n * ```js\n * Modernizr.addTest('hasjquery', 'jQuery' in window);\n * ```\n *\n * Just like before, when the above runs `Modernizr.hasjquery` will be true if\n * jQuery has been included on the page. Not using a function saves a small amount\n * of overhead for the browser, as well as making your code much more readable.\n *\n * Finally, you also have the ability to pass in an object of feature names and\n * their tests. This is handy if you want to add multiple detections in one go.\n * The keys should always be a string, and the value can be either a boolean or\n * function that returns a boolean.\n *\n * ```js\n * var detects = {\n * 'hasjquery': 'jQuery' in window,\n * 'itstuesday': function() {\n * var d = new Date();\n * return d.getDay() === 2;\n * }\n * }\n *\n * Modernizr.addTest(detects);\n * ```\n *\n * There is really no difference between the first methods and this one, it is\n * just a convenience to let you write more readable code.\n */\n function addTest(feature, test) {\n\n if (typeof feature === 'object') {\n for (var key in feature) {\n if (hasOwnProp(feature, key)) {\n addTest(key, feature[ key ]);\n }\n }\n } else {\n\n feature = feature.toLowerCase();\n var featureNameSplit = feature.split('.');\n var last = Modernizr[featureNameSplit[0]];\n\n // Again, we don't check for parent test existence. Get that right, though.\n if (featureNameSplit.length === 2) {\n last = last[featureNameSplit[1]];\n }\n\n if (typeof last !== 'undefined') {\n // we're going to quit if you're trying to overwrite an existing test\n // if we were to allow it, we'd do this:\n // var re = new RegExp(\"\\\\b(no-)?\" + feature + \"\\\\b\");\n // docElement.className = docElement.className.replace( re, '' );\n // but, no rly, stuff 'em.\n return Modernizr;\n }\n\n test = typeof test === 'function' ? test() : test;\n\n // Set the value (this is the magic, right here).\n if (featureNameSplit.length === 1) {\n Modernizr[featureNameSplit[0]] = test;\n } else {\n // cast to a Boolean, if not one already\n if (Modernizr[featureNameSplit[0]] && !(Modernizr[featureNameSplit[0]] instanceof Boolean)) {\n Modernizr[featureNameSplit[0]] = new Boolean(Modernizr[featureNameSplit[0]]);\n }\n\n Modernizr[featureNameSplit[0]][featureNameSplit[1]] = test;\n }\n\n // Set a single class (either `feature` or `no-feature`)\n setClasses([(!!test && test !== false ? '' : 'no-') + featureNameSplit.join('-')]);\n\n // Trigger the event\n Modernizr._trigger(feature, test);\n }\n\n return Modernizr; // allow chaining.\n }\n\n // After all the tests are run, add self to the Modernizr prototype\n Modernizr._q.push(function() {\n ModernizrProto.addTest = addTest;\n });\n\n \n\n\n /**\n * @optionName html5printshiv\n * @optionProp html5printshiv\n */\n\n // Take the html5 variable out of the html5shiv scope so we can return it.\n var html5;\n if (!isSVG) {\n /**\n * @preserve HTML5 Shiv 3.7.3 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed\n */\n ;(function(window, document) {\n /*jshint evil:true */\n /** version */\n var version = '3.7.3';\n\n /** Preset options */\n var options = window.html5 || {};\n\n /** Used to skip problem elements */\n var reSkip = /^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;\n\n /** Not all elements can be cloned in IE **/\n var saveClones = /^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i;\n\n /** Detect whether the browser supports default html5 styles */\n var supportsHtml5Styles;\n\n /** Name of the expando, to work with multiple documents or to re-shiv one document */\n var expando = '_html5shiv';\n\n /** The id for the the documents expando */\n var expanID = 0;\n\n /** Cached data for each document */\n var expandoData = {};\n\n /** Detect whether the browser supports unknown elements */\n var supportsUnknownElements;\n\n (function() {\n try {\n var a = document.createElement('a');\n a.innerHTML = '';\n //if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles\n supportsHtml5Styles = ('hidden' in a);\n\n supportsUnknownElements = a.childNodes.length == 1 || (function() {\n // assign a false positive if unable to shiv\n (document.createElement)('a');\n var frag = document.createDocumentFragment();\n return (\n typeof frag.cloneNode == 'undefined' ||\n typeof frag.createDocumentFragment == 'undefined' ||\n typeof frag.createElement == 'undefined'\n );\n }());\n } catch(e) {\n // assign a false positive if detection fails => unable to shiv\n supportsHtml5Styles = true;\n supportsUnknownElements = true;\n }\n\n }());\n\n /*--------------------------------------------------------------------------*/\n\n /**\n * Creates a style sheet with the given CSS text and adds it to the document.\n * @private\n * @param {Document} ownerDocument The document.\n * @param {String} cssText The CSS text.\n * @returns {StyleSheet} The style element.\n */\n function addStyleSheet(ownerDocument, cssText) {\n var p = ownerDocument.createElement('p'),\n parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;\n\n p.innerHTML = 'x';\n return parent.insertBefore(p.lastChild, parent.firstChild);\n }\n\n /**\n * Returns the value of `html5.elements` as an array.\n * @private\n * @returns {Array} An array of shived element node names.\n */\n function getElements() {\n var elements = html5.elements;\n return typeof elements == 'string' ? elements.split(' ') : elements;\n }\n\n /**\n * Extends the built-in list of html5 elements\n * @memberOf html5\n * @param {String|Array} newElements whitespace separated list or array of new element names to shiv\n * @param {Document} ownerDocument The context document.\n */\n function addElements(newElements, ownerDocument) {\n var elements = html5.elements;\n if(typeof elements != 'string'){\n elements = elements.join(' ');\n }\n if(typeof newElements != 'string'){\n newElements = newElements.join(' ');\n }\n html5.elements = elements +' '+ newElements;\n shivDocument(ownerDocument);\n }\n\n /**\n * Returns the data associated to the given document\n * @private\n * @param {Document} ownerDocument The document.\n * @returns {Object} An object of data.\n */\n function getExpandoData(ownerDocument) {\n var data = expandoData[ownerDocument[expando]];\n if (!data) {\n data = {};\n expanID++;\n ownerDocument[expando] = expanID;\n expandoData[expanID] = data;\n }\n return data;\n }\n\n /**\n * returns a shived element for the given nodeName and document\n * @memberOf html5\n * @param {String} nodeName name of the element\n * @param {Document} ownerDocument The context document.\n * @returns {Object} The shived element.\n */\n function createElement(nodeName, ownerDocument, data){\n if (!ownerDocument) {\n ownerDocument = document;\n }\n if(supportsUnknownElements){\n return ownerDocument.createElement(nodeName);\n }\n if (!data) {\n data = getExpandoData(ownerDocument);\n }\n var node;\n\n if (data.cache[nodeName]) {\n node = data.cache[nodeName].cloneNode();\n } else if (saveClones.test(nodeName)) {\n node = (data.cache[nodeName] = data.createElem(nodeName)).cloneNode();\n } else {\n node = data.createElem(nodeName);\n }\n\n // Avoid adding some elements to fragments in IE < 9 because\n // * Attributes like `name` or `type` cannot be set/changed once an element\n // is inserted into a document/fragment\n // * Link elements with `src` attributes that are inaccessible, as with\n // a 403 response, will cause the tab/window to crash\n // * Script elements appended to fragments will execute when their `src`\n // or `text` property is set\n return node.canHaveChildren && !reSkip.test(nodeName) && !node.tagUrn ? data.frag.appendChild(node) : node;\n }\n\n /**\n * returns a shived DocumentFragment for the given document\n * @memberOf html5\n * @param {Document} ownerDocument The context document.\n * @returns {Object} The shived DocumentFragment.\n */\n function createDocumentFragment(ownerDocument, data){\n if (!ownerDocument) {\n ownerDocument = document;\n }\n if(supportsUnknownElements){\n return ownerDocument.createDocumentFragment();\n }\n data = data || getExpandoData(ownerDocument);\n var clone = data.frag.cloneNode(),\n i = 0,\n elems = getElements(),\n l = elems.length;\n for(;i+~])(' + getElements().join('|') + ')(?=[[\\\\s,>+~#.:]|$)', 'gi'),\n replacement = '$1' + shivNamespace + '\\\\:$2';\n\n while (index--) {\n pair = parts[index] = parts[index].split('}');\n pair[pair.length - 1] = pair[pair.length - 1].replace(reElements, replacement);\n parts[index] = pair.join('}');\n }\n return parts.join('{');\n }\n\n /**\n * Removes the given wrappers, leaving the original elements.\n * @private\n * @params {Array} wrappers An array of printable wrappers.\n */\n function removeWrappers(wrappers) {\n var index = wrappers.length;\n while (index--) {\n wrappers[index].removeNode();\n }\n }\n\n /*--------------------------------------------------------------------------*/\n\n /**\n * Shivs the given document for print.\n * @memberOf html5\n * @param {Document} ownerDocument The document to shiv.\n * @returns {Document} The shived document.\n */\n function shivPrint(ownerDocument) {\n var shivedSheet,\n wrappers,\n data = getExpandoData(ownerDocument),\n namespaces = ownerDocument.namespaces,\n ownerWindow = ownerDocument.parentWindow;\n\n if (!supportsShivableSheets || ownerDocument.printShived) {\n return ownerDocument;\n }\n if (typeof namespaces[shivNamespace] == 'undefined') {\n namespaces.add(shivNamespace);\n }\n\n function removeSheet() {\n clearTimeout(data._removeSheetTimer);\n if (shivedSheet) {\n shivedSheet.removeNode(true);\n }\n shivedSheet= null;\n }\n\n ownerWindow.attachEvent('onbeforeprint', function() {\n\n removeSheet();\n\n var imports,\n length,\n sheet,\n collection = ownerDocument.styleSheets,\n cssText = [],\n index = collection.length,\n sheets = Array(index);\n\n // convert styleSheets collection to an array\n while (index--) {\n sheets[index] = collection[index];\n }\n // concat all style sheet CSS text\n while ((sheet = sheets.pop())) {\n // IE does not enforce a same origin policy for external style sheets...\n // but has trouble with some dynamically created stylesheets\n if (!sheet.disabled && reMedia.test(sheet.media)) {\n\n try {\n imports = sheet.imports;\n length = imports.length;\n } catch(er){\n length = 0;\n }\n\n for (index = 0; index < length; index++) {\n sheets.push(imports[index]);\n }\n\n try {\n cssText.push(sheet.cssText);\n } catch(er){}\n }\n }\n\n // wrap all HTML5 elements with printable elements and add the shived style sheet\n cssText = shivCssText(cssText.reverse().join(''));\n wrappers = addWrappers(ownerDocument);\n shivedSheet = addStyleSheet(ownerDocument, cssText);\n\n });\n\n ownerWindow.attachEvent('onafterprint', function() {\n // remove wrappers, leaving the original elements, and remove the shived style sheet\n removeWrappers(wrappers);\n clearTimeout(data._removeSheetTimer);\n data._removeSheetTimer = setTimeout(removeSheet, 500);\n });\n\n ownerDocument.printShived = true;\n return ownerDocument;\n }\n\n /*--------------------------------------------------------------------------*/\n\n // expose API\n html5.type += ' print';\n html5.shivPrint = shivPrint;\n\n // shiv for print\n shivPrint(document);\n\n if(typeof module == 'object' && module.exports){\n module.exports = html5;\n }\n\n }(typeof window !== \"undefined\" ? window : this, document));\n }\n\n ;\n\n /**\n * contains checks to see if a string contains another string\n *\n * @access private\n * @function contains\n * @param {string} str - The string we want to check for substrings\n * @param {string} substr - The substring we want to search the first string for\n * @returns {boolean} true if and only if the first string 'str' contains the second string 'substr'\n */\n function contains(str, substr) {\n return !!~('' + str).indexOf(substr);\n }\n\n ;\n\n /**\n * createElement is a convenience wrapper around document.createElement. Since we\n * use createElement all over the place, this allows for (slightly) smaller code\n * as well as abstracting away issues with creating elements in contexts other than\n * HTML documents (e.g. SVG documents).\n *\n * @access private\n * @function createElement\n * @returns {HTMLElement|SVGElement} An HTML or SVG element\n */\n function createElement() {\n if (typeof document.createElement !== 'function') {\n // This is the case in IE7, where the type of createElement is \"object\".\n // For this reason, we cannot call apply() as Object is not a Function.\n return document.createElement(arguments[0]);\n } else if (isSVG) {\n return document.createElementNS.call(document, 'http://www.w3.org/2000/svg', arguments[0]);\n } else {\n return document.createElement.apply(document, arguments);\n }\n }\n\n ;\n\n /**\n * Create our \"modernizr\" element that we do most feature tests on.\n *\n * @access private\n */\n var modElem = {\n elem: createElement('modernizr')\n };\n\n // Clean up this element\n Modernizr._q.push(function() {\n delete modElem.elem;\n });\n\n \n\n var mStyle = {\n style: modElem.elem.style\n };\n\n // kill ref for gc, must happen before mod.elem is removed, so we unshift on to\n // the front of the queue.\n Modernizr._q.unshift(function() {\n delete mStyle.style;\n });\n\n \n\n /**\n * getBody returns the body of a document, or an element that can stand in for\n * the body if a real body does not exist\n *\n * @access private\n * @function getBody\n * @returns {HTMLElement|SVGElement} Returns the real body of a document, or an\n * artificially created element that stands in for the body\n */\n function getBody() {\n // After page load injecting a fake body doesn't work so check if body exists\n var body = document.body;\n\n if (!body) {\n // Can't use the real body create a fake one.\n body = createElement(isSVG ? 'svg' : 'body');\n body.fake = true;\n }\n\n return body;\n }\n\n ;\n\n /**\n * injectElementWithStyles injects an element with style element and some CSS rules\n *\n * @access private\n * @function injectElementWithStyles\n * @param {string} rule - String representing a css rule\n * @param {Function} callback - A function that is used to test the injected element\n * @param {number} [nodes] - An integer representing the number of additional nodes you want injected\n * @param {string[]} [testnames] - An array of strings that are used as ids for the additional nodes\n * @returns {boolean} the result of the specified callback test\n */\n function injectElementWithStyles(rule, callback, nodes, testnames) {\n var mod = 'modernizr';\n var style;\n var ret;\n var node;\n var docOverflow;\n var div = createElement('div');\n var body = getBody();\n\n if (parseInt(nodes, 10)) {\n // In order not to give false positives we create a node for each test\n // This also allows the method to scale for unspecified uses\n while (nodes--) {\n node = createElement('div');\n node.id = testnames ? testnames[nodes] : mod + (nodes + 1);\n div.appendChild(node);\n }\n }\n\n style = createElement('style');\n style.type = 'text/css';\n style.id = 's' + mod;\n\n // IE6 will false positive on some tests due to the style element inside the test div somehow interfering offsetHeight, so insert it into body or fakebody.\n // Opera will act all quirky when injecting elements in documentElement when page is served as xml, needs fakebody too. #270\n (!body.fake ? div : body).appendChild(style);\n body.appendChild(div);\n\n if (style.styleSheet) {\n style.styleSheet.cssText = rule;\n } else {\n style.appendChild(document.createTextNode(rule));\n }\n div.id = mod;\n\n if (body.fake) {\n //avoid crashing IE8, if background image is used\n body.style.background = '';\n //Safari 5.13/5.1.4 OSX stops loading if ::-webkit-scrollbar is used and scrollbars are visible\n body.style.overflow = 'hidden';\n docOverflow = docElement.style.overflow;\n docElement.style.overflow = 'hidden';\n docElement.appendChild(body);\n }\n\n ret = callback(div, rule);\n // If this is done after page load we don't want to remove the body so check if body exists\n if (body.fake && body.parentNode) {\n body.parentNode.removeChild(body);\n docElement.style.overflow = docOverflow;\n // Trigger layout so kinetic scrolling isn't disabled in iOS6+\n // eslint-disable-next-line\n docElement.offsetHeight;\n } else {\n div.parentNode.removeChild(div);\n }\n\n return !!ret;\n }\n\n ;\n\n /**\n * domToCSS takes a camelCase string and converts it to hyphen-case\n * e.g. boxSizing -> box-sizing\n *\n * @access private\n * @function domToCSS\n * @param {string} name - String name of camelCase prop we want to convert\n * @returns {string} The hyphen-case version of the supplied name\n */\n function domToCSS(name) {\n return name.replace(/([A-Z])/g, function(str, m1) {\n return '-' + m1.toLowerCase();\n }).replace(/^ms-/, '-ms-');\n }\n\n ;\n\n\n /**\n * wrapper around getComputedStyle, to fix issues with Firefox returning null when\n * called inside of a hidden iframe\n *\n * @access private\n * @function computedStyle\n * @param {HTMLElement|SVGElement} elem - The element we want to find the computed styles of\n * @param {string|null} [pseudo] - An optional pseudo element selector (e.g. :before), of null if none\n * @param {string} prop - A CSS property\n * @returns {CSSStyleDeclaration} the value of the specified CSS property\n */\n function computedStyle(elem, pseudo, prop) {\n var result;\n\n if ('getComputedStyle' in window) {\n result = getComputedStyle.call(window, elem, pseudo);\n var console = window.console;\n\n if (result !== null) {\n if (prop) {\n result = result.getPropertyValue(prop);\n }\n } else {\n if (console) {\n var method = console.error ? 'error' : 'log';\n console[method].call(console, 'getComputedStyle returning null, its possible modernizr test results are inaccurate');\n }\n }\n } else {\n result = !pseudo && elem.currentStyle && elem.currentStyle[prop];\n }\n\n return result;\n }\n\n ;\n\n /**\n * nativeTestProps allows for us to use native feature detection functionality if available.\n * some prefixed form, or false, in the case of an unsupported rule\n *\n * @access private\n * @function nativeTestProps\n * @param {Array} props - An array of property names\n * @param {string} value - A string representing the value we want to check via @supports\n * @returns {boolean|undefined} A boolean when @supports exists, undefined otherwise\n */\n // Accepts a list of property names and a single value\n // Returns `undefined` if native detection not available\n function nativeTestProps(props, value) {\n var i = props.length;\n // Start with the JS API: https://www.w3.org/TR/css3-conditional/#the-css-interface\n if ('CSS' in window && 'supports' in window.CSS) {\n // Try every prefixed variant of the property\n while (i--) {\n if (window.CSS.supports(domToCSS(props[i]), value)) {\n return true;\n }\n }\n return false;\n }\n // Otherwise fall back to at-rule (for Opera 12.x)\n else if ('CSSSupportsRule' in window) {\n // Build a condition string for every prefixed variant\n var conditionText = [];\n while (i--) {\n conditionText.push('(' + domToCSS(props[i]) + ':' + value + ')');\n }\n conditionText = conditionText.join(' or ');\n return injectElementWithStyles('@supports (' + conditionText + ') { #modernizr { position: absolute; } }', function(node) {\n return computedStyle(node, null, 'position') === 'absolute';\n });\n }\n return undefined;\n }\n ;\n\n /**\n * cssToDOM takes a hyphen-case string and converts it to camelCase\n * e.g. box-sizing -> boxSizing\n *\n * @access private\n * @function cssToDOM\n * @param {string} name - String name of hyphen-case prop we want to convert\n * @returns {string} The camelCase version of the supplied name\n */\n function cssToDOM(name) {\n return name.replace(/([a-z])-([a-z])/g, function(str, m1, m2) {\n return m1 + m2.toUpperCase();\n }).replace(/^-/, '');\n }\n\n ;\n\n // testProps is a generic CSS / DOM property test.\n\n // In testing support for a given CSS property, it's legit to test:\n // `elem.style[styleName] !== undefined`\n // If the property is supported it will return an empty string,\n // if unsupported it will return undefined.\n\n // We'll take advantage of this quick test and skip setting a style\n // on our modernizr element, but instead just testing undefined vs\n // empty string.\n\n // Property names can be provided in either camelCase or hyphen-case.\n\n function testProps(props, prefixed, value, skipValueTest) {\n skipValueTest = is(skipValueTest, 'undefined') ? false : skipValueTest;\n\n // Try native detect first\n if (!is(value, 'undefined')) {\n var result = nativeTestProps(props, value);\n if (!is(result, 'undefined')) {\n return result;\n }\n }\n\n // Otherwise do it properly\n var afterInit, i, propsLength, prop, before;\n\n // If we don't have a style element, that means we're running async or after\n // the core tests, so we'll need to create our own elements to use.\n\n // Inside of an SVG element, in certain browsers, the `style` element is only\n // defined for valid tags. Therefore, if `modernizr` does not have one, we\n // fall back to a less used element and hope for the best.\n // For strict XHTML browsers the hardly used samp element is used.\n var elems = ['modernizr', 'tspan', 'samp'];\n while (!mStyle.style && elems.length) {\n afterInit = true;\n mStyle.modElem = createElement(elems.shift());\n mStyle.style = mStyle.modElem.style;\n }\n\n // Delete the objects if we created them.\n function cleanElems() {\n if (afterInit) {\n delete mStyle.style;\n delete mStyle.modElem;\n }\n }\n\n propsLength = props.length;\n for (i = 0; i < propsLength; i++) {\n prop = props[i];\n before = mStyle.style[prop];\n\n if (contains(prop, '-')) {\n prop = cssToDOM(prop);\n }\n\n if (mStyle.style[prop] !== undefined) {\n\n // If value to test has been passed in, do a set-and-check test.\n // 0 (integer) is a valid property value, so check that `value` isn't\n // undefined, rather than just checking it's truthy.\n if (!skipValueTest && !is(value, 'undefined')) {\n\n // Needs a try catch block because of old IE. This is slow, but will\n // be avoided in most cases because `skipValueTest` will be used.\n try {\n mStyle.style[prop] = value;\n } catch (e) {}\n\n // If the property value has changed, we assume the value used is\n // supported. If `value` is empty string, it'll fail here (because\n // it hasn't changed), which matches how browsers have implemented\n // CSS.supports()\n if (mStyle.style[prop] !== before) {\n cleanElems();\n return prefixed === 'pfx' ? prop : true;\n }\n }\n // Otherwise just return true, or the property name if this is a\n // `prefixed()` call\n else {\n cleanElems();\n return prefixed === 'pfx' ? prop : true;\n }\n }\n }\n cleanElems();\n return false;\n }\n\n ;\n\n /**\n * testProp() investigates whether a given style property is recognized\n * Property names can be provided in either camelCase or hyphen-case.\n *\n * @memberOf Modernizr\n * @name Modernizr.testProp\n * @access public\n * @optionName Modernizr.testProp()\n * @optionProp testProp\n * @function testProp\n * @param {string} prop - Name of the CSS property to check\n * @param {string} [value] - Name of the CSS value to check\n * @param {boolean} [useValue] - Whether or not to check the value if @supports isn't supported\n * @returns {boolean} an empty string if the property is supported, undefined if its unsupported\n * @example\n *\n * Just like [testAllProps](#modernizr-testallprops), only it does not check any vendor prefixed\n * version of the string.\n *\n * Note that the property name must be provided in camelCase (e.g. boxSizing not box-sizing)\n *\n * ```js\n * Modernizr.testProp('pointerEvents') // true\n * ```\n *\n * You can also provide a value as an optional second argument to check if a\n * specific value is supported\n *\n * ```js\n * Modernizr.testProp('pointerEvents', 'none') // true\n * Modernizr.testProp('pointerEvents', 'penguin') // false\n * ```\n */\n var testProp = ModernizrProto.testProp = function(prop, value, useValue) {\n return testProps([prop], undefined, value, useValue);\n };\n\n \n\n /**\n * fnBind is a super small [bind](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind) polyfill.\n *\n * @access private\n * @function fnBind\n * @param {Function} fn - a function you want to change `this` reference to\n * @param {object} that - the `this` you want to call the function with\n * @returns {Function} The wrapped version of the supplied function\n */\n function fnBind(fn, that) {\n return function() {\n return fn.apply(that, arguments);\n };\n }\n\n ;\n\n /**\n * If the browsers follow the spec, then they would expose vendor-specific styles as:\n * elem.style.WebkitBorderRadius\n * instead of something like the following (which is technically incorrect):\n * elem.style.webkitBorderRadius\n *\n * WebKit ghosts their properties in lowercase but Opera & Moz do not.\n * Microsoft uses a lowercase `ms` instead of the correct `Ms` in IE8+\n * erik.eae.net/archives/2008/03/10/21.48.10/\n *\n * More here: github.com/Modernizr/Modernizr/issues/issue/21\n *\n * @access private\n * @returns {string} The string representing the vendor-specific style properties\n */\n var omPrefixes = 'Moz O ms Webkit';\n \n\n var cssomPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.split(' ') : []);\n ModernizrProto._cssomPrefixes = cssomPrefixes;\n \n\n /**\n * List of JavaScript DOM values used for tests\n *\n * @memberOf Modernizr\n * @name Modernizr._domPrefixes\n * @optionName Modernizr._domPrefixes\n * @optionProp domPrefixes\n * @access public\n * @example\n *\n * Modernizr._domPrefixes is exactly the same as [_prefixes](#modernizr-_prefixes), but rather\n * than hyphen-case properties, all properties are their Capitalized variant\n *\n * ```js\n * Modernizr._domPrefixes === [ \"Moz\", \"O\", \"ms\", \"Webkit\" ];\n * ```\n */\n var domPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.toLowerCase().split(' ') : []);\n ModernizrProto._domPrefixes = domPrefixes;\n \n\n /**\n * testDOMProps is a generic DOM property test; if a browser supports\n * a certain property, it won't return undefined for it.\n *\n * @access private\n * @function testDOMProps\n * @param {Array} props - An array of properties to test for\n * @param {object} obj - An object or Element you want to use to test the parameters again\n * @param {boolean|object} elem - An Element to bind the property lookup again. Use `false` to prevent the check\n * @returns {boolean|*} returns `false` if the prop is unsupported, otherwise the value that is supported\n */\n function testDOMProps(props, obj, elem) {\n var item;\n\n for (var i in props) {\n if (props[i] in obj) {\n\n // return the property name as a string\n if (elem === false) {\n return props[i];\n }\n\n item = obj[props[i]];\n\n // let's bind a function\n if (is(item, 'function')) {\n // bind to obj unless overridden\n return fnBind(item, elem || obj);\n }\n\n // return the unbound function or obj or value\n return item;\n }\n }\n return false;\n }\n\n ;\n\n /**\n * testPropsAll tests a list of DOM properties we want to check against.\n * We specify literally ALL possible (known and/or likely) properties on\n * the element including the non-vendor prefixed one, for forward-\n * compatibility.\n *\n * @access private\n * @function testPropsAll\n * @param {string} prop - A string of the property to test for\n * @param {string|object} [prefixed] - An object to check the prefixed properties on. Use a string to skip\n * @param {HTMLElement|SVGElement} [elem] - An element used to test the property and value against\n * @param {string} [value] - A string of a css value\n * @param {boolean} [skipValueTest] - An boolean representing if you want to test if value sticks when set\n * @returns {string|boolean} returns the string version of the property, or `false` if it is unsupported\n */\n function testPropsAll(prop, prefixed, elem, value, skipValueTest) {\n\n var ucProp = prop.charAt(0).toUpperCase() + prop.slice(1),\n props = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' ');\n\n // did they call .prefixed('boxSizing') or are we just testing a prop?\n if (is(prefixed, 'string') || is(prefixed, 'undefined')) {\n return testProps(props, prefixed, value, skipValueTest);\n\n // otherwise, they called .prefixed('requestAnimationFrame', window[, elem])\n } else {\n props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');\n return testDOMProps(props, prefixed, elem);\n }\n }\n\n // Modernizr.testAllProps() investigates whether a given style property,\n // or any of its vendor-prefixed variants, is recognized\n //\n // Note that the property names must be provided in the camelCase variant.\n // Modernizr.testAllProps('boxSizing')\n ModernizrProto.testAllProps = testPropsAll;\n\n \n\n /**\n * atRule returns a given CSS property at-rule (eg @keyframes), possibly in\n * some prefixed form, or false, in the case of an unsupported rule\n *\n * @memberOf Modernizr\n * @name Modernizr.atRule\n * @optionName Modernizr.atRule()\n * @optionProp atRule\n * @access public\n * @function atRule\n * @param {string} prop - String name of the @-rule to test for\n * @returns {string|boolean} The string representing the (possibly prefixed)\n * valid version of the @-rule, or `false` when it is unsupported.\n * @example\n * ```js\n * var keyframes = Modernizr.atRule('@keyframes');\n *\n * if (keyframes) {\n * // keyframes are supported\n * // could be `@-webkit-keyframes` or `@keyframes`\n * } else {\n * // keyframes === `false`\n * }\n * ```\n */\n var atRule = function(prop) {\n var length = prefixes.length;\n var cssrule = window.CSSRule;\n var rule;\n\n if (typeof cssrule === 'undefined') {\n return undefined;\n }\n\n if (!prop) {\n return false;\n }\n\n // remove literal @ from beginning of provided property\n prop = prop.replace(/^@/, '');\n\n // CSSRules use underscores instead of dashes\n rule = prop.replace(/-/g, '_').toUpperCase() + '_RULE';\n\n if (rule in cssrule) {\n return '@' + prop;\n }\n\n for (var i = 0; i < length; i++) {\n // prefixes gives us something like -o-, and we want O_\n var prefix = prefixes[i];\n var thisRule = prefix.toUpperCase() + '_' + rule;\n\n if (thisRule in cssrule) {\n return '@-' + prefix.toLowerCase() + '-' + prop;\n }\n }\n\n return false;\n };\n\n ModernizrProto.atRule = atRule;\n\n \n\n /**\n * prefixed returns the prefixed or nonprefixed property name variant of your input\n *\n * @memberOf Modernizr\n * @name Modernizr.prefixed\n * @optionName Modernizr.prefixed()\n * @optionProp prefixed\n * @access public\n * @function prefixed\n * @param {string} prop - String name of the property to test for\n * @param {object} [obj] - An object to test for the prefixed properties on\n * @param {HTMLElement} [elem] - An element used to test specific properties against\n * @returns {string|boolean} The string representing the (possibly prefixed) valid\n * version of the property, or `false` when it is unsupported.\n * @example\n *\n * Modernizr.prefixed takes a string css value in the DOM style camelCase (as\n * opposed to the css style hyphen-case) form and returns the (possibly prefixed)\n * version of that property that the browser actually supports.\n *\n * For example, in older Firefox...\n * ```js\n * prefixed('boxSizing')\n * ```\n * returns 'MozBoxSizing'\n *\n * In newer Firefox, as well as any other browser that support the unprefixed\n * version would simply return `boxSizing`. Any browser that does not support\n * the property at all, it will return `false`.\n *\n * By default, prefixed is checked against a DOM element. If you want to check\n * for a property on another object, just pass it as a second argument\n *\n * ```js\n * var rAF = prefixed('requestAnimationFrame', window);\n *\n * raf(function() {\n * renderFunction();\n * })\n * ```\n *\n * Note that this will return _the actual function_ - not the name of the function.\n * If you need the actual name of the property, pass in `false` as a third argument\n *\n * ```js\n * var rAFProp = prefixed('requestAnimationFrame', window, false);\n *\n * rafProp === 'WebkitRequestAnimationFrame' // in older webkit\n * ```\n *\n * One common use case for prefixed is if you're trying to determine which transition\n * end event to bind to, you might do something like...\n * ```js\n * var transEndEventNames = {\n * 'WebkitTransition' : 'webkitTransitionEnd', * Saf 6, Android Browser\n * 'MozTransition' : 'transitionend', * only for FF < 15\n * 'transition' : 'transitionend' * IE10, Opera, Chrome, FF 15+, Saf 7+\n * };\n *\n * var transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];\n * ```\n *\n * If you want a similar lookup, but in hyphen-case, you can use [prefixedCSS](#modernizr-prefixedcss).\n */\n var prefixed = ModernizrProto.prefixed = function(prop, obj, elem) {\n if (prop.indexOf('@') === 0) {\n return atRule(prop);\n }\n\n if (prop.indexOf('-') !== -1) {\n // Convert hyphen-case to camelCase\n prop = cssToDOM(prop);\n }\n if (!obj) {\n return testPropsAll(prop, 'pfx');\n } else {\n // Testing DOM property e.g. Modernizr.prefixed('requestAnimationFrame', window) // 'mozRequestAnimationFrame'\n return testPropsAll(prop, obj, elem);\n }\n };\n\n \n/*!\n{\n \"name\": \"CSS Regions\",\n \"caniuse\": \"css-regions\",\n \"authors\": [\"Mihai Balan\"],\n \"property\": \"regions\",\n \"tags\": [\"css\"],\n \"builderAliases\": [\"css_regions\"],\n \"notes\": [{\n \"name\": \"W3C Spec\",\n \"href\": \"https://www.w3.org/TR/css3-regions/\"\n }]\n}\n!*/\n\n // We start with a CSS parser test then we check page geometry to see if it's affected by regions\n // Later we might be able to retire the second part, as WebKit builds with the false positives die out\n\n Modernizr.addTest('regions', function() {\n\n if (isSVG) {\n // css regions don't work inside of SVG elements. Rather than update the\n // below test to work in an SVG context, just exit early to save bytes\n return false;\n }\n\n /* Get the 'flowFrom' property name available in the browser. Either default or vendor prefixed.\n If the property name can't be found we'll get Boolean 'false' and fail quickly */\n var flowFromProperty = prefixed('flowFrom');\n var flowIntoProperty = prefixed('flowInto');\n var result = false;\n\n if (!flowFromProperty || !flowIntoProperty) {\n return result;\n }\n\n /* If CSS parsing is there, try to determine if regions actually work. */\n var iframeContainer = createElement('iframe');\n var container = createElement('div');\n var content = createElement('div');\n var region = createElement('div');\n\n /* we create a random, unlikely to be generated flow number to make sure we don't\n clash with anything more vanilla, like 'flow', or 'article', or 'f1' */\n var flowName = 'modernizr_flow_for_regions_check';\n\n /* First create a div with two adjacent divs inside it. The first will be the\n content, the second will be the region. To be able to distinguish between the two,\n we'll give the region a particular padding */\n content.innerText = 'M';\n container.style.cssText = 'top: 150px; left: 150px; padding: 0px;';\n region.style.cssText = 'width: 50px; height: 50px; padding: 42px;';\n\n region.style[flowFromProperty] = flowName;\n container.appendChild(content);\n container.appendChild(region);\n docElement.appendChild(container);\n\n /* Now compute the bounding client rect, before and after attempting to flow the\n content div in the region div. If regions are enabled, the after bounding rect\n should reflect the padding of the region div.*/\n var flowedRect, delta;\n var plainRect = content.getBoundingClientRect();\n\n content.style[flowIntoProperty] = flowName;\n flowedRect = content.getBoundingClientRect();\n\n delta = parseInt(flowedRect.left - plainRect.left, 10);\n docElement.removeChild(container);\n\n if (delta === 42) {\n result = true;\n } else {\n /* IE only allows for the content to come from iframes. This has the\n * side effect of automatic collapsing of iframes once they get the flow-into\n * property set. checking for a change on the height allows us to detect this\n * in a sync way, without having to wait for a frame to load */\n\n docElement.appendChild(iframeContainer);\n plainRect = iframeContainer.getBoundingClientRect();\n iframeContainer.style[flowIntoProperty] = flowName;\n flowedRect = iframeContainer.getBoundingClientRect();\n\n if (plainRect.height > 0 && plainRect.height !== flowedRect.height && flowedRect.height === 0) {\n result = true;\n }\n }\n\n content = region = container = iframeContainer = undefined;\n\n return result;\n });\n\n/*!\n{\n \"name\": \"[hidden] Attribute\",\n \"property\": \"hidden\",\n \"tags\": [\"dom\"],\n \"notes\": [{\n \"name\": \"WHATWG Spec\",\n \"href\": \"https://html.spec.whatwg.org/dev/interaction.html#the-hidden-attribute\"\n }, {\n \"name\": \"original implementation of detect code\",\n \"href\": \"https://github.com/aFarkas/html5shiv/blob/bf4fcc4/src/html5shiv.js#L38\"\n }],\n \"polyfills\": [\"html5shiv\"],\n \"authors\": [\"Ron Waldon (@jokeyrhyme)\"]\n}\n!*/\n/* DOC\nDoes the browser support the HTML5 [hidden] attribute?\n*/\n\n Modernizr.addTest('hidden', 'hidden' in createElement('a'));\n\n/*!\n{\n \"name\": \"SVG\",\n \"property\": \"svg\",\n \"caniuse\": \"svg\",\n \"tags\": [\"svg\"],\n \"authors\": [\"Erik Dahlstrom\"],\n \"polyfills\": [\n \"svgweb\",\n \"raphael\",\n \"amplesdk\",\n \"canvg\",\n \"svg-boilerplate\",\n \"sie\",\n \"dojogfx\",\n \"fabricjs\"\n ]\n}\n!*/\n/* DOC\nDetects support for SVG in `