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/*!
* modernizr v3.5.0
* Build https://modernizr.com/download?-domprefixes-prefixes-setclasses-shiv-testallprops-testprop-teststyles-dontmin
*
* Copyright (c)
* Faruk Ates
* Paul Irish
* Alex Sexton
* Ryan Seddon
* Patrick Kettner
* Stu Cox
* Richard Herrera
* MIT License
*/
/*
* Modernizr tests which native CSS3 and HTML5 features are available in the
* current UA and makes the results available to you in two ways: as properties on
* a global `Modernizr` object, and as classes on the `<html>` element. This
* information allows you to progressively enhance your pages with a granular level
* of control over the experience.
*/
;(function(window, document, undefined){
var classes = [];
var tests = [];
/**
*
* ModernizrProto is the constructor for Modernizr
*
* @class
* @access public
*/
var ModernizrProto = {
// The current version, dummy
_version: '3.5.0',
// Any settings that don't work as separate modules
// can go in here as configuration.
_config: {
'classPrefix': '',
'enableClasses': true,
'enableJSClass': true,
'usePrefixes': true
},
// Queue of tests
_q: [],
// Stub these for people who are listening
on: function(test, cb) {
// I don't really think people should do this, but we can
// safe guard it a bit.
// -- NOTE:: this gets WAY overridden in src/addTest for actual async tests.
// This is in case people listen to synchronous tests. I would leave it out,
// but the code to *disallow* sync tests in the real version of this
// function is actually larger than this.
var self = this;
setTimeout(function() {
cb(self[test]);
}, 0);
},
addTest: function(name, fn, options) {
tests.push({name: name, fn: fn, options: options});
},
addAsyncTest: function(fn) {
tests.push({name: null, fn: fn});
}
};
// Fake some of Object.create so we can force non test results to be non "own" properties.
var Modernizr = function() {};
Modernizr.prototype = ModernizrProto;
// Leak modernizr globally when you `require` it rather than force it here.
// Overwrite name so constructor name is nicer :D
Modernizr = new Modernizr();
/**
* List of property values to set for css tests. See ticket #21
* http://git.io/vUGl4
*
* @memberof Modernizr
* @name Modernizr._prefixes
* @optionName Modernizr._prefixes
* @optionProp prefixes
* @access public
* @example
*
* Modernizr._prefixes is the internal list of prefixes that we test against
* inside of things like [prefixed](#modernizr-prefixed) and [prefixedCSS](#-code-modernizr-prefixedcss). It is simply
* an array of kebab-case vendor prefixes you can use within your code.
*
* Some common use cases include
*
* Generating all possible prefixed version of a CSS property
* ```js
* var rule = Modernizr._prefixes.join('transform: rotate(20deg); ');
*
* rule === 'transform: rotate(20deg); webkit-transform: rotate(20deg); moz-transform: rotate(20deg); o-transform: rotate(20deg); ms-transform: rotate(20deg);'
* ```
*
* Generating all possible prefixed version of a CSS value
* ```js
* rule = 'display:' + Modernizr._prefixes.join('flex; display:') + 'flex';
*
* rule === 'display:flex; display:-webkit-flex; display:-moz-flex; display:-o-flex; display:-ms-flex; display:flex'
* ```
*/
// we use ['',''] rather than an empty array in order to allow a pattern of .`join()`ing prefixes to test
// values in feature detects to continue to work
var prefixes = (ModernizrProto._config.usePrefixes ? ' -webkit- -moz- -o- -ms- '.split(' ') : ['','']);
// expose these for the plugin API. Look in the source for how to join() them against your input
ModernizrProto._prefixes = prefixes;
/**
* is returns a boolean if the typeof an obj is exactly type.
*
* @access private
* @function is
* @param {*} obj - A thing we want to check the type of
* @param {string} type - A string to compare the typeof against
* @returns {boolean}
*/
function is(obj, type) {
return typeof obj === type;
}
;
/**
* Run through all tests and detect their support in the current UA.
*
* @access private
*/
function testRunner() {
var featureNames;
var feature;
var aliasIdx;
var result;
var nameIdx;
var featureName;
var featureNameSplit;
for (var featureIdx in tests) {
if (tests.hasOwnProperty(featureIdx)) {
featureNames = [];
feature = tests[featureIdx];
// run the test, throw the return value into the Modernizr,
// then based on that boolean, define an appropriate className
// and push it into an array of classes we'll join later.
//
// If there is no name, it's an 'async' test that is run,
// but not directly added to the object. That should
// be done with a post-run addTest call.
if (feature.name) {
featureNames.push(feature.name.toLowerCase());
if (feature.options && feature.options.aliases && feature.options.aliases.length) {
// Add all the aliases into the names list
for (aliasIdx = 0; aliasIdx < feature.options.aliases.length; aliasIdx++) {
featureNames.push(feature.options.aliases[aliasIdx].toLowerCase());
}
}
}
// Run the test, or use the raw value if it's not a function
result = is(feature.fn, 'function') ? feature.fn() : feature.fn;
// Set each of the names on the Modernizr object
for (nameIdx = 0; nameIdx < featureNames.length; nameIdx++) {
featureName = featureNames[nameIdx];
// Support dot properties as sub tests. We don't do checking to make sure
// that the implied parent tests have been added. You must call them in
// order (either in the test, or make the parent test a dependency).
//
// Cap it to TWO to make the logic simple and because who needs that kind of subtesting
// hashtag famous last words
featureNameSplit = featureName.split('.');
if (featureNameSplit.length === 1) {
Modernizr[featureNameSplit[0]] = result;
} else {
// cast to a Boolean, if not one already
if (Modernizr[featureNameSplit[0]] && !(Modernizr[featureNameSplit[0]] instanceof Boolean)) {
Modernizr[featureNameSplit[0]] = new Boolean(Modernizr[featureNameSplit[0]]);
}
Modernizr[featureNameSplit[0]][featureNameSplit[1]] = result;
}
classes.push((result ? '' : 'no-') + featureNameSplit.join('-'));
}
}
}
}
;
/**
* docElement is a convenience wrapper to grab the root element of the document
*
* @access private
* @returns {HTMLElement|SVGElement} The root element of the document
*/
var docElement = document.documentElement;
/**
* A convenience helper to check if the document we are running in is an SVG document
*
* @access private
* @returns {boolean}
*/
var isSVG = docElement.nodeName.toLowerCase() === 'svg';
/**
* setClasses takes an array of class names and adds them to the root element
*
* @access private
* @function setClasses
* @param {string[]} classes - Array of class names
*/
// Pass in an and array of class names, e.g.:
// ['no-webp', 'borderradius', ...]
function setClasses(classes) {
var className = docElement.className;
var classPrefix = Modernizr._config.classPrefix || '';
if (isSVG) {
className = className.baseVal;
}
// Change `no-js` to `js` (independently of the `enableClasses` option)
// Handle classPrefix on this too
if (Modernizr._config.enableJSClass) {
var reJS = new RegExp('(^|\\s)' + classPrefix + 'no-js(\\s|$)');
className = className.replace(reJS, '$1' + classPrefix + 'js$2');
}
if (Modernizr._config.enableClasses) {
// Add the new classes
className += ' ' + classPrefix + classes.join(' ' + classPrefix);
if (isSVG) {
docElement.className.baseVal = className;
} else {
docElement.className = className;
}
}
}
;
/**
* @optionName html5shiv
* @optionProp html5shiv
*/
// Take the html5 variable out of the html5shiv scope so we can return it.
var html5;
if (!isSVG) {
/**
* @preserve HTML5 Shiv 3.7.3 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
*/
;(function(window, document) {
/** version */
var version = '3.7.3';
/** Preset options */
var options = window.html5 || {};
/** Used to skip problem elements */
var reSkip = /^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;
/** Not all elements can be cloned in IE **/
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;
/** Detect whether the browser supports default html5 styles */
var supportsHtml5Styles;
/** Name of the expando, to work with multiple documents or to re-shiv one document */
var expando = '_html5shiv';
/** The id for the the documents expando */
var expanID = 0;
/** Cached data for each document */
var expandoData = {};
/** Detect whether the browser supports unknown elements */
var supportsUnknownElements;
(function() {
try {
var a = document.createElement('a');
a.innerHTML = '<xyz></xyz>';
//if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles
supportsHtml5Styles = ('hidden' in a);
supportsUnknownElements = a.childNodes.length == 1 || (function() {
// assign a false positive if unable to shiv
(document.createElement)('a');
var frag = document.createDocumentFragment();
return (
typeof frag.cloneNode == 'undefined' ||
typeof frag.createDocumentFragment == 'undefined' ||
typeof frag.createElement == 'undefined'
);
}());
} catch(e) {
// assign a false positive if detection fails => unable to shiv
supportsHtml5Styles = true;
supportsUnknownElements = true;
}
}());
/*--------------------------------------------------------------------------*/
/**
* Creates a style sheet with the given CSS text and adds it to the document.
* @private
* @param {Document} ownerDocument The document.
* @param {String} cssText The CSS text.
* @returns {StyleSheet} The style element.
*/
function addStyleSheet(ownerDocument, cssText) {
var p = ownerDocument.createElement('p'),
parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;
p.innerHTML = 'x<style>' + cssText + '</style>';
return parent.insertBefore(p.lastChild, parent.firstChild);
}
/**
* Returns the value of `html5.elements` as an array.
* @private
* @returns {Array} An array of shived element node names.
*/
function getElements() {
var elements = html5.elements;
return typeof elements == 'string' ? elements.split(' ') : elements;
}
/**
* Extends the built-in list of html5 elements
* @memberOf html5
* @param {String|Array} newElements whitespace separated list or array of new element names to shiv
* @param {Document} ownerDocument The context document.
*/
function addElements(newElements, ownerDocument) {
var elements = html5.elements;
if(typeof elements != 'string'){
elements = elements.join(' ');
}
if(typeof newElements != 'string'){
newElements = newElements.join(' ');
}
html5.elements = elements +' '+ newElements;
shivDocument(ownerDocument);
}
/**
* Returns the data associated to the given document
* @private
* @param {Document} ownerDocument The document.
* @returns {Object} An object of data.
*/
function getExpandoData(ownerDocument) {
var data = expandoData[ownerDocument[expando]];
if (!data) {
data = {};
expanID++;
ownerDocument[expando] = expanID;
expandoData[expanID] = data;
}
return data;
}
/**
* returns a shived element for the given nodeName and document
* @memberOf html5
* @param {String} nodeName name of the element
* @param {Document|DocumentFragment} ownerDocument The context document.
* @returns {Object} The shived element.
*/
function createElement(nodeName, ownerDocument, data){
if (!ownerDocument) {
ownerDocument = document;
}
if(supportsUnknownElements){
return ownerDocument.createElement(nodeName);
}
if (!data) {
data = getExpandoData(ownerDocument);
}
var node;
if (data.cache[nodeName]) {
node = data.cache[nodeName].cloneNode();
} else if (saveClones.test(nodeName)) {
node = (data.cache[nodeName] = data.createElem(nodeName)).cloneNode();
} else {
node = data.createElem(nodeName);
}
// Avoid adding some elements to fragments in IE < 9 because
// * Attributes like `name` or `type` cannot be set/changed once an element
// is inserted into a document/fragment
// * Link elements with `src` attributes that are inaccessible, as with
// a 403 response, will cause the tab/window to crash
// * Script elements appended to fragments will execute when their `src`
// or `text` property is set
return node.canHaveChildren && !reSkip.test(nodeName) && !node.tagUrn ? data.frag.appendChild(node) : node;
}
/**
* returns a shived DocumentFragment for the given document
* @memberOf html5
* @param {Document} ownerDocument The context document.
* @returns {Object} The shived DocumentFragment.
*/
function createDocumentFragment(ownerDocument, data){
if (!ownerDocument) {
ownerDocument = document;
}
if(supportsUnknownElements){
return ownerDocument.createDocumentFragment();
}
data = data || getExpandoData(ownerDocument);
var clone = data.frag.cloneNode(),
i = 0,
elems = getElements(),
l = elems.length;
for(;i<l;i++){
clone.createElement(elems[i]);
}
return clone;
}
/**
* Shivs the `createElement` and `createDocumentFragment` methods of the document.
* @private
* @param {Document|DocumentFragment} ownerDocument The document.
* @param {Object} data of the document.
*/
function shivMethods(ownerDocument, data) {
if (!data.cache) {
data.cache = {};
data.createElem = ownerDocument.createElement;
data.createFrag = ownerDocument.createDocumentFragment;
data.frag = data.createFrag();
}
ownerDocument.createElement = function(nodeName) {
//abort shiv
if (!html5.shivMethods) {
return data.createElem(nodeName);
}
return createElement(nodeName, ownerDocument, data);
};
ownerDocument.createDocumentFragment = Function('h,f', 'return function(){' +
'var n=f.cloneNode(),c=n.createElement;' +
'h.shivMethods&&(' +
// unroll the `createElement` calls
getElements().join().replace(/[\w\-:]+/g, function(nodeName) {
data.createElem(nodeName);
data.frag.createElement(nodeName);
return 'c("' + nodeName + '")';
}) +
');return n}'
)(html5, data.frag);
}
/*--------------------------------------------------------------------------*/
/**
* Shivs the given document.
* @memberOf html5
* @param {Document} ownerDocument The document to shiv.
* @returns {Document} The shived document.
*/
function shivDocument(ownerDocument) {
if (!ownerDocument) {
ownerDocument = document;
}
var data = getExpandoData(ownerDocument);
if (html5.shivCSS && !supportsHtml5Styles && !data.hasCSS) {
data.hasCSS = !!addStyleSheet(ownerDocument,
// corrects block display not defined in IE6/7/8/9
'article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}' +
// adds styling not present in IE6/7/8/9
'mark{background:#FF0;color:#000}' +
// hides non-rendered elements
'template{display:none}'
);
}
if (!supportsUnknownElements) {
shivMethods(ownerDocument, data);
}
return ownerDocument;
}
/*--------------------------------------------------------------------------*/
/**
* The `html5` object is exposed so that more elements can be shived and
* existing shiving can be detected on iframes.
* @type Object
* @example
*
* // options can be changed before the script is included
* html5 = { 'elements': 'mark section', 'shivCSS': false, 'shivMethods': false };
*/
var html5 = {
/**
* An array or space separated string of node names of the elements to shiv.
* @memberOf html5
* @type Array|String
*/
'elements': options.elements || 'abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output picture progress section summary template time video',
/**
* current version of html5shiv
*/
'version': version,
/**
* A flag to indicate that the HTML5 style sheet should be inserted.
* @memberOf html5
* @type Boolean
*/
'shivCSS': (options.shivCSS !== false),
/**
* Is equal to true if a browser supports creating unknown/HTML5 elements
* @memberOf html5
* @type boolean
*/
'supportsUnknownElements': supportsUnknownElements,
/**
* A flag to indicate that the document's `createElement` and `createDocumentFragment`
* methods should be overwritten.
* @memberOf html5
* @type Boolean
*/
'shivMethods': (options.shivMethods !== false),
/**
* A string to describe the type of `html5` object ("default" or "default print").
* @memberOf html5
* @type String
*/
'type': 'default',
// shivs the document according to the specified `html5` object options
'shivDocument': shivDocument,
//creates a shived element
createElement: createElement,
//creates a shived documentFragment
createDocumentFragment: createDocumentFragment,
//extends list of elements
addElements: addElements
};
/*--------------------------------------------------------------------------*/
// expose html5
window.html5 = html5;
// shiv the document
shivDocument(document);
if(typeof module == 'object' && module.exports){
module.exports = html5;
}
}(typeof window !== 'undefined' ? window : this, document));
}
;
/**
* If the browsers follow the spec, then they would expose vendor-specific styles as:
* elem.style.WebkitBorderRadius
* instead of something like the following (which is technically incorrect):
* elem.style.webkitBorderRadius
* WebKit ghosts their properties in lowercase but Opera & Moz do not.
* Microsoft uses a lowercase `ms` instead of the correct `Ms` in IE8+
* erik.eae.net/archives/2008/03/10/21.48.10/
* More here: github.com/Modernizr/Modernizr/issues/issue/21
*
* @access private
* @returns {string} The string representing the vendor-specific style properties
*/
var omPrefixes = 'Moz O ms Webkit';
/**
* List of JavaScript DOM values used for tests
*
* @memberof Modernizr
* @name Modernizr._domPrefixes
* @optionName Modernizr._domPrefixes
* @optionProp domPrefixes
* @access public
* @example
*
* Modernizr._domPrefixes is exactly the same as [_prefixes](#modernizr-_prefixes), but rather
* than kebab-case properties, all properties are their Capitalized variant
*
* ```js
* Modernizr._domPrefixes === [ "Moz", "O", "ms", "Webkit" ];
* ```
*/
var domPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.toLowerCase().split(' ') : []);
ModernizrProto._domPrefixes = domPrefixes;
var cssomPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.split(' ') : []);
ModernizrProto._cssomPrefixes = cssomPrefixes;
/**
* contains checks to see if a string contains another string
*
* @access private
* @function contains
* @param {string} str - The string we want to check for substrings
* @param {string} substr - The substring we want to search the first string for
* @returns {boolean}
*/
function contains(str, substr) {
return !!~('' + str).indexOf(substr);
}
;
/**
* createElement is a convenience wrapper around document.createElement. Since we
* use createElement all over the place, this allows for (slightly) smaller code
* as well as abstracting away issues with creating elements in contexts other than
* HTML documents (e.g. SVG documents).
*
* @access private
* @function createElement
* @returns {HTMLElement|SVGElement} An HTML or SVG element
*/
function createElement() {
if (typeof document.createElement !== 'function') {
// This is the case in IE7, where the type of createElement is "object".
// For this reason, we cannot call apply() as Object is not a Function.
return document.createElement(arguments[0]);
} else if (isSVG) {
return document.createElementNS.call(document, 'http://www.w3.org/2000/svg', arguments[0]);
} else {
return document.createElement.apply(document, arguments);
}
}
;
/**
* cssToDOM takes a kebab-case string and converts it to camelCase
* e.g. box-sizing -> boxSizing
*
* @access private
* @function cssToDOM
* @param {string} name - String name of kebab-case prop we want to convert
* @returns {string} The camelCase version of the supplied name
*/
function cssToDOM(name) {
return name.replace(/([a-z])-([a-z])/g, function(str, m1, m2) {
return m1 + m2.toUpperCase();
}).replace(/^-/, '');
}
;
/**
* getBody returns the body of a document, or an element that can stand in for
* the body if a real body does not exist
*
* @access private
* @function getBody
* @returns {HTMLElement|SVGElement} Returns the real body of a document, or an
* artificially created element that stands in for the body
*/
function getBody() {
// After page load injecting a fake body doesn't work so check if body exists
var body = document.body;
if (!body) {
// Can't use the real body create a fake one.
body = createElement(isSVG ? 'svg' : 'body');
body.fake = true;
}
return body;
}
;
/**
* injectElementWithStyles injects an element with style element and some CSS rules
*
* @access private
* @function injectElementWithStyles
* @param {string} rule - String representing a css rule
* @param {function} callback - A function that is used to test the injected element
* @param {number} [nodes] - An integer representing the number of additional nodes you want injected
* @param {string[]} [testnames] - An array of strings that are used as ids for the additional nodes
* @returns {boolean}
*/
function injectElementWithStyles(rule, callback, nodes, testnames) {
var mod = 'modernizr';
var style;
var ret;
var node;
var docOverflow;
var div = createElement('div');
var body = getBody();
if (parseInt(nodes, 10)) {
// In order not to give false positives we create a node for each test
// This also allows the method to scale for unspecified uses
while (nodes--) {
node = createElement('div');
node.id = testnames ? testnames[nodes] : mod + (nodes + 1);
div.appendChild(node);
}
}
style = createElement('style');
style.type = 'text/css';
style.id = 's' + mod;
// 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.
// Opera will act all quirky when injecting elements in documentElement when page is served as xml, needs fakebody too. #270
(!body.fake ? div : body).appendChild(style);
body.appendChild(div);
if (style.styleSheet) {
style.styleSheet.cssText = rule;
} else {
style.appendChild(document.createTextNode(rule));
}
div.id = mod;
if (body.fake) {
//avoid crashing IE8, if background image is used
body.style.background = '';
//Safari 5.13/5.1.4 OSX stops loading if ::-webkit-scrollbar is used and scrollbars are visible
body.style.overflow = 'hidden';
docOverflow = docElement.style.overflow;
docElement.style.overflow = 'hidden';
docElement.appendChild(body);
}
ret = callback(div, rule);
// If this is done after page load we don't want to remove the body so check if body exists
if (body.fake) {
body.parentNode.removeChild(body);
docElement.style.overflow = docOverflow;
// Trigger layout so kinetic scrolling isn't disabled in iOS6+
// eslint-disable-next-line
docElement.offsetHeight;
} else {
div.parentNode.removeChild(div);
}
return !!ret;
}
;
/**
* testStyles injects an element with style element and some CSS rules
*
* @memberof Modernizr
* @name Modernizr.testStyles
* @optionName Modernizr.testStyles()
* @optionProp testStyles
* @access public
* @function testStyles
* @param {string} rule - String representing a css rule
* @param {function} callback - A function that is used to test the injected element
* @param {number} [nodes] - An integer representing the number of additional nodes you want injected
* @param {string[]} [testnames] - An array of strings that are used as ids for the additional nodes
* @returns {boolean}
* @example
*
* `Modernizr.testStyles` takes a CSS rule and injects it onto the current page
* along with (possibly multiple) DOM elements. This lets you check for features
* that can not be detected by simply checking the [IDL](https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Interface_development_guide/IDL_interface_rules).
*
* ```js
* Modernizr.testStyles('#modernizr { width: 9px; color: papayawhip; }', function(elem, rule) {
* // elem is the first DOM node in the page (by default #modernizr)
* // rule is the first argument you supplied - the CSS rule in string form
*
* addTest('widthworks', elem.style.width === '9px')
* });
* ```
*
* If your test requires multiple nodes, you can include a third argument
* indicating how many additional div elements to include on the page. The
* additional nodes are injected as children of the `elem` that is returned as
* the first argument to the callback.
*
* ```js
* Modernizr.testStyles('#modernizr {width: 1px}; #modernizr2 {width: 2px}', function(elem) {
* document.getElementById('modernizr').style.width === '1px'; // true
* document.getElementById('modernizr2').style.width === '2px'; // true
* elem.firstChild === document.getElementById('modernizr2'); // true
* }, 1);
* ```
*
* By default, all of the additional elements have an ID of `modernizr[n]`, where
* `n` is its index (e.g. the first additional, second overall is `#modernizr2`,
* the second additional is `#modernizr3`, etc.).
* If you want to have more meaningful IDs for your function, you can provide
* them as the fourth argument, as an array of strings
*
* ```js
* Modernizr.testStyles('#foo {width: 10px}; #bar {height: 20px}', function(elem) {
* elem.firstChild === document.getElementById('foo'); // true
* elem.lastChild === document.getElementById('bar'); // true
* }, 2, ['foo', 'bar']);
* ```
*
*/
var testStyles = ModernizrProto.testStyles = injectElementWithStyles;
/**
* fnBind is a super small [bind](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind) polyfill.
*
* @access private
* @function fnBind
* @param {function} fn - a function you want to change `this` reference to
* @param {object} that - the `this` you want to call the function with
* @returns {function} The wrapped version of the supplied function
*/
function fnBind(fn, that) {
return function() {
return fn.apply(that, arguments);
};
}
;
/**
* testDOMProps is a generic DOM property test; if a browser supports
* a certain property, it won't return undefined for it.
*
* @access private
* @function testDOMProps
* @param {array.<string>} props - An array of properties to test for
* @param {object} obj - An object or Element you want to use to test the parameters again
* @param {boolean|object} elem - An Element to bind the property lookup again. Use `false` to prevent the check
* @returns {false|*} returns false if the prop is unsupported, otherwise the value that is supported
*/
function testDOMProps(props, obj, elem) {
var item;
for (var i in props) {
if (props[i] in obj) {
// return the property name as a string
if (elem === false) {
return props[i];
}
item = obj[props[i]];
// let's bind a function
if (is(item, 'function')) {
// bind to obj unless overriden
return fnBind(item, elem || obj);
}
// return the unbound function or obj or value
return item;
}
}
return false;
}
;
/**
* Create our "modernizr" element that we do most feature tests on.
*
* @access private
*/
var modElem = {
elem: createElement('modernizr')
};
// Clean up this element
Modernizr._q.push(function() {
delete modElem.elem;
});
var mStyle = {
style: modElem.elem.style
};
// kill ref for gc, must happen before mod.elem is removed, so we unshift on to
// the front of the queue.
Modernizr._q.unshift(function() {
delete mStyle.style;
});
/**
* domToCSS takes a camelCase string and converts it to kebab-case
* e.g. boxSizing -> box-sizing
*
* @access private
* @function domToCSS
* @param {string} name - String name of camelCase prop we want to convert
* @returns {string} The kebab-case version of the supplied name
*/
function domToCSS(name) {
return name.replace(/([A-Z])/g, function(str, m1) {
return '-' + m1.toLowerCase();
}).replace(/^ms-/, '-ms-');
}
;
/**
* wrapper around getComputedStyle, to fix issues with Firefox returning null when
* called inside of a hidden iframe
*
* @access private
* @function computedStyle
* @param {HTMLElement|SVGElement} - The element we want to find the computed styles of
* @param {string|null} [pseudoSelector]- An optional pseudo element selector (e.g. :before), of null if none
* @returns {CSSStyleDeclaration}
*/
function computedStyle(elem, pseudo, prop) {
var result;
if ('getComputedStyle' in window) {
result = getComputedStyle.call(window, elem, pseudo);
var console = window.console;
if (result !== null) {
if (prop) {
result = result.getPropertyValue(prop);
}
} else {
if (console) {
var method = console.error ? 'error' : 'log';
console[method].call(console, 'getComputedStyle returning null, its possible modernizr test results are inaccurate');
}
}
} else {
result = !pseudo && elem.currentStyle && elem.currentStyle[prop];
}
return result;
}
;
/**
* nativeTestProps allows for us to use native feature detection functionality if available.
* some prefixed form, or false, in the case of an unsupported rule
*
* @access private
* @function nativeTestProps
* @param {array} props - An array of property names
* @param {string} value - A string representing the value we want to check via @supports
* @returns {boolean|undefined} A boolean when @supports exists, undefined otherwise
*/
// Accepts a list of property names and a single value
// Returns `undefined` if native detection not available
function nativeTestProps(props, value) {
var i = props.length;
// Start with the JS API: http://www.w3.org/TR/css3-conditional/#the-css-interface
if ('CSS' in window && 'supports' in window.CSS) {
// Try every prefixed variant of the property
while (i--) {
if (window.CSS.supports(domToCSS(props[i]), value)) {
return true;
}
}
return false;
}
// Otherwise fall back to at-rule (for Opera 12.x)
else if ('CSSSupportsRule' in window) {
// Build a condition string for every prefixed variant
var conditionText = [];
while (i--) {
conditionText.push('(' + domToCSS(props[i]) + ':' + value + ')');
}
conditionText = conditionText.join(' or ');
return injectElementWithStyles('@supports (' + conditionText + ') { #modernizr { position: absolute; } }', function(node) {
return computedStyle(node, null, 'position') == 'absolute';
});
}
return undefined;
}
;
// testProps is a generic CSS / DOM property test.
// In testing support for a given CSS property, it's legit to test:
// `elem.style[styleName] !== undefined`
// If the property is supported it will return an empty string,
// if unsupported it will return undefined.
// We'll take advantage of this quick test and skip setting a style
// on our modernizr element, but instead just testing undefined vs
// empty string.
// Property names can be provided in either camelCase or kebab-case.
function testProps(props, prefixed, value, skipValueTest) {
skipValueTest = is(skipValueTest, 'undefined') ? false : skipValueTest;
// Try native detect first
if (!is(value, 'undefined')) {
var result = nativeTestProps(props, value);
if (!is(result, 'undefined')) {
return result;
}
}
// Otherwise do it properly
var afterInit, i, propsLength, prop, before;
// If we don't have a style element, that means we're running async or after
// the core tests, so we'll need to create our own elements to use
// inside of an SVG element, in certain browsers, the `style` element is only
// defined for valid tags. Therefore, if `modernizr` does not have one, we
// fall back to a less used element and hope for the best.
// for strict XHTML browsers the hardly used samp element is used
var elems = ['modernizr', 'tspan', 'samp'];
while (!mStyle.style && elems.length) {
afterInit = true;
mStyle.modElem = createElement(elems.shift());
mStyle.style = mStyle.modElem.style;
}
// Delete the objects if we created them.
function cleanElems() {
if (afterInit) {
delete mStyle.style;
delete mStyle.modElem;
}
}
propsLength = props.length;
for (i = 0; i < propsLength; i++) {
prop = props[i];
before = mStyle.style[prop];
if (contains(prop, '-')) {
prop = cssToDOM(prop);
}
if (mStyle.style[prop] !== undefined) {
// If value to test has been passed in, do a set-and-check test.
// 0 (integer) is a valid property value, so check that `value` isn't
// undefined, rather than just checking it's truthy.
if (!skipValueTest && !is(value, 'undefined')) {
// Needs a try catch block because of old IE. This is slow, but will
// be avoided in most cases because `skipValueTest` will be used.
try {
mStyle.style[prop] = value;
} catch (e) {}
// If the property value has changed, we assume the value used is
// supported. If `value` is empty string, it'll fail here (because
// it hasn't changed), which matches how browsers have implemented
// CSS.supports()
if (mStyle.style[prop] != before) {
cleanElems();
return prefixed == 'pfx' ? prop : true;
}
}
// Otherwise just return true, or the property name if this is a
// `prefixed()` call
else {
cleanElems();
return prefixed == 'pfx' ? prop : true;
}
}
}
cleanElems();
return false;
}
;
/**
* testProp() investigates whether a given style property is recognized
* Property names can be provided in either camelCase or kebab-case.
*
* @memberof Modernizr
* @name Modernizr.testProp
* @access public
* @optionName Modernizr.testProp()
* @optionProp testProp
* @function testProp
* @param {string} prop - Name of the CSS property to check
* @param {string} [value] - Name of the CSS value to check
* @param {boolean} [useValue] - Whether or not to check the value if @supports isn't supported
* @returns {boolean}
* @example
*
* Just like [testAllProps](#modernizr-testallprops), only it does not check any vendor prefixed
* version of the string.
*
* Note that the property name must be provided in camelCase (e.g. boxSizing not box-sizing)
*
* ```js
* Modernizr.testProp('pointerEvents') // true
* ```
*
* You can also provide a value as an optional second argument to check if a
* specific value is supported
*
* ```js
* Modernizr.testProp('pointerEvents', 'none') // true
* Modernizr.testProp('pointerEvents', 'penguin') // false
* ```
*/
var testProp = ModernizrProto.testProp = function(prop, value, useValue) {
return testProps([prop], undefined, value, useValue);
};
/**
* testPropsAll tests a list of DOM properties we want to check against.
* We specify literally ALL possible (known and/or likely) properties on
* the element including the non-vendor prefixed one, for forward-
* compatibility.
*
* @access private
* @function testPropsAll
* @param {string} prop - A string of the property to test for
* @param {string|object} [prefixed] - An object to check the prefixed properties on. Use a string to skip
* @param {HTMLElement|SVGElement} [elem] - An element used to test the property and value against
* @param {string} [value] - A string of a css value
* @param {boolean} [skipValueTest] - An boolean representing if you want to test if value sticks when set
* @returns {false|string} returns the string version of the property, or false if it is unsupported
*/
function testPropsAll(prop, prefixed, elem, value, skipValueTest) {
var ucProp = prop.charAt(0).toUpperCase() + prop.slice(1),
props = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' ');
// did they call .prefixed('boxSizing') or are we just testing a prop?
if (is(prefixed, 'string') || is(prefixed, 'undefined')) {
return testProps(props, prefixed, value, skipValueTest);
// otherwise, they called .prefixed('requestAnimationFrame', window[, elem])
} else {
props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');
return testDOMProps(props, prefixed, elem);
}
}
// Modernizr.testAllProps() investigates whether a given style property,
// or any of its vendor-prefixed variants, is recognized
//
// Note that the property names must be provided in the camelCase variant.
// Modernizr.testAllProps('boxSizing')
ModernizrProto.testAllProps = testPropsAll;
/**
* testAllProps determines whether a given CSS property is supported in the browser
*
* @memberof Modernizr
* @name Modernizr.testAllProps
* @optionName Modernizr.testAllProps()
* @optionProp testAllProps
* @access public
* @function testAllProps
* @param {string} prop - String naming the property to test (either camelCase or kebab-case)
* @param {string} [value] - String of the value to test
* @param {boolean} [skipValueTest=false] - Whether to skip testing that the value is supported when using non-native detection
* @example
*
* testAllProps determines whether a given CSS property, in some prefixed form,
* is supported by the browser.
*
* ```js
* testAllProps('boxSizing') // true
* ```
*
* It can optionally be given a CSS value in string form to test if a property
* value is valid
*
* ```js
* testAllProps('display', 'block') // true
* testAllProps('display', 'penguin') // false
* ```
*
* A boolean can be passed as a third parameter to skip the value check when
* native detection (@supports) isn't available.
*
* ```js
* testAllProps('shapeOutside', 'content-box', true);
* ```
*/
function testAllProps(prop, value, skipValueTest) {
return testPropsAll(prop, undefined, undefined, value, skipValueTest);
}
ModernizrProto.testAllProps = testAllProps;
// Run each test
testRunner();
// Remove the "no-js" class if it exists
setClasses(classes);
delete ModernizrProto.addTest;
delete ModernizrProto.addAsyncTest;
// Run the things that are supposed to run after the tests
for (var i = 0; i < Modernizr._q.length; i++) {
Modernizr._q[i]();
}
// Leak Modernizr namespace
window.Modernizr = Modernizr;
;
})(window, document);