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make demo page great again
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/*!
* modernizr v3.5.0
* Build https://modernizr.com/download?-adownload-canvas-cssanimations-csstransforms-documentfragment-fullscreen-localstorage-svg-texttrackapi_track-todataurljpeg_todataurlpng_todataurlwebp-video-websockets-setclasses-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();
/*!
{
"name": "SVG",
"property": "svg",
"caniuse": "svg",
"tags": ["svg"],
"authors": ["Erik Dahlstrom"],
"polyfills": [
"svgweb",
"raphael",
"amplesdk",
"canvg",
"svg-boilerplate",
"sie",
"dojogfx",
"fabricjs"
]
}
!*/
/* DOC
Detects support for SVG in `<embed>` or `<object>` elements.
*/
Modernizr.addTest('svg', !!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', 'svg').createSVGRect);
/*!
{
"name": "WebSockets Support",
"property": "websockets",
"authors": ["Phread [fearphage]", "Mike Sherov [mikesherov]", "Burak Yigit Kaya [BYK]"],
"caniuse": "websockets",
"tags": ["html5"],
"warnings": [
"This test will reject any old version of WebSockets even if it is not prefixed such as in Safari 5.1"
],
"notes": [{
"name": "CLOSING State and Spec",
"href": "https://www.w3.org/TR/websockets/#the-websocket-interface"
}],
"polyfills": [
"sockjs",
"socketio",
"kaazing-websocket-gateway",
"websocketjs",
"atmosphere",
"graceful-websocket",
"portal",
"datachannel"
]
}
!*/
var supports = false;
try {
supports = 'WebSocket' in window && window.WebSocket.CLOSING === 2;
} catch (e) {}
Modernizr.addTest('websockets', supports);
/*!
{
"name": "Local Storage",
"property": "localstorage",
"caniuse": "namevalue-storage",
"tags": ["storage"],
"knownBugs": [],
"notes": [],
"warnings": [],
"polyfills": [
"joshuabell-polyfill",
"cupcake",
"storagepolyfill",
"amplifyjs",
"yui-cacheoffline"
]
}
!*/
// In FF4, if disabled, window.localStorage should === null.
// Normally, we could not test that directly and need to do a
// `('localStorage' in window)` test first because otherwise Firefox will
// throw bugzil.la/365772 if cookies are disabled
// Similarly, in Chrome with "Block third-party cookies and site data" enabled,
// attempting to access `window.sessionStorage` will throw an exception. crbug.com/357625
// Also in iOS5 Private Browsing mode, attempting to use localStorage.setItem
// will throw the exception:
// QUOTA_EXCEEDED_ERROR DOM Exception 22.
// Peculiarly, getItem and removeItem calls do not throw.
// Because we are forced to try/catch this, we'll go aggressive.
// Just FWIW: IE8 Compat mode supports these features completely:
// www.quirksmode.org/dom/html5.html
// But IE8 doesn't support either with local files
Modernizr.addTest('localstorage', function() {
var mod = 'modernizr';
try {
localStorage.setItem(mod, mod);
localStorage.removeItem(mod);
return true;
} catch (e) {
return false;
}
});
/**
* 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;
/*!
{
"name": "Document Fragment",
"property": "documentfragment",
"notes": [{
"name": "W3C DOM Level 1 Reference",
"href": "https://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-B63ED1A3"
}, {
"name": "SitePoint Reference",
"href": "http://reference.sitepoint.com/javascript/DocumentFragment"
}, {
"name": "QuirksMode Compatibility Tables",
"href": "http://www.quirksmode.org/m/w3c_core.html#t112"
}],
"authors": ["Ron Waldon (@jokeyrhyme)"],
"knownBugs": ["false-positive on Blackberry 9500, see QuirksMode note"],
"tags": []
}
!*/
/* DOC
Append multiple elements to the DOM within a single insertion.
*/
Modernizr.addTest('documentfragment', function() {
return 'createDocumentFragment' in document &&
'appendChild' in docElement;
});
/**
* 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;
}
}
}
;
/**
* 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);
}
}
;
/*!
{
"name": "Canvas",
"property": "canvas",
"caniuse": "canvas",
"tags": ["canvas", "graphics"],
"polyfills": ["flashcanvas", "excanvas", "slcanvas", "fxcanvas"]
}
!*/
/* DOC
Detects support for the `<canvas>` element for 2D drawing.
*/
// On the S60 and BB Storm, getContext exists, but always returns undefined
// so we actually have to call getContext() to verify
// github.com/Modernizr/Modernizr/issues/issue/97/
Modernizr.addTest('canvas', function() {
var elem = createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
});
/*!
{
"name": "HTML5 Video",
"property": "video",
"caniuse": "video",
"tags": ["html5"],
"knownBugs": [
"Without QuickTime, `Modernizr.video.h264` will be `undefined`; https://github.com/Modernizr/Modernizr/issues/546"
],
"polyfills": [
"html5media",
"mediaelementjs",
"sublimevideo",
"videojs",
"leanbackplayer",
"videoforeverybody"
]
}
!*/
/* DOC
Detects support for the video element, as well as testing what types of content it supports.
Subproperties are provided to describe support for `ogg`, `h264` and `webm` formats, e.g.:
```javascript
Modernizr.video // true
Modernizr.video.ogg // 'probably'
```
*/
// Codec values from : github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845
// thx to NielsLeenheer and zcorpan
// Note: in some older browsers, "no" was a return value instead of empty string.
// It was live in FF3.5.0 and 3.5.1, but fixed in 3.5.2
// It was also live in Safari 4.0.0 - 4.0.4, but fixed in 4.0.5
Modernizr.addTest('video', function() {
var elem = createElement('video');
var bool = false;
// IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
try {
bool = !!elem.canPlayType
if (bool) {
bool = new Boolean(bool);
bool.ogg = elem.canPlayType('video/ogg; codecs="theora"').replace(/^no$/, '');
// Without QuickTime, this value will be `undefined`. github.com/Modernizr/Modernizr/issues/546
bool.h264 = elem.canPlayType('video/mp4; codecs="avc1.42E01E"').replace(/^no$/, '');
bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/, '');
bool.vp9 = elem.canPlayType('video/webm; codecs="vp9"').replace(/^no$/, '');
bool.hls = elem.canPlayType('application/x-mpegURL; codecs="avc1.42E01E"').replace(/^no$/, '');
}
} catch (e) {}
return bool;
});
/*!
{
"name": "a[download] Attribute",
"property": "adownload",
"caniuse" : "download",
"tags": ["media", "attribute"],
"builderAliases": ["a_download"],
"notes": [{
"name": "WhatWG Reference",
"href": "https://developers.whatwg.org/links.html#downloading-resources"
}]
}
!*/
/* DOC
When used on an `<a>`, this attribute signifies that the resource it points to should be downloaded by the browser rather than navigating to it.
*/
Modernizr.addTest('adownload', !window.externalHost && 'download' in createElement('a'));
/*!
{
"name": "canvas.toDataURL type support",
"property": ["todataurljpeg", "todataurlpng", "todataurlwebp"],
"tags": ["canvas"],
"builderAliases": ["canvas_todataurl_type"],
"async" : false,
"notes": [{
"name": "MDN article",
"href": "https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement.toDataURL"
}]
}
!*/
var canvas = createElement('canvas');
Modernizr.addTest('todataurljpeg', function() {
return !!Modernizr.canvas && canvas.toDataURL('image/jpeg').indexOf('data:image/jpeg') === 0;
});
Modernizr.addTest('todataurlpng', function() {
return !!Modernizr.canvas && canvas.toDataURL('image/png').indexOf('data:image/png') === 0;
});
Modernizr.addTest('todataurlwebp', function() {
var supports = false;
// firefox 3 throws an error when you use an "invalid" toDataUrl
try {
supports = !!Modernizr.canvas && canvas.toDataURL('image/webp').indexOf('data:image/webp') === 0;
} catch (e) {}
return supports;
});
/*!
{
"name": "Track element and Timed Text Track",
"property": ["texttrackapi", "track"],
"tags": ["elem"],
"builderAliases": ["elem_track"],
"authors": ["Addy Osmani"],
"notes": [{
"name": "W3 track Element Spec",
"href": "http://www.w3.org/TR/html5/video.html#the-track-element"
},{
"name": "W3 track API Spec",
"href": "http://www.w3.org/TR/html5/media-elements.html#text-track-api"
}],
"warnings": ["While IE10 has implemented the track element, IE10 does not expose the underlying APIs to create timed text tracks by JS (really sad)"]
}
!*/
Modernizr.addTest('texttrackapi', typeof (createElement('video').addTextTrack) === 'function');
// a more strict test for track including UI support: document.createElement('track').kind === 'subtitles'
Modernizr.addTest('track', 'kind' in createElement('track'));
/**
* 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(/^-/, '');
}
;
/**
* 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';
var cssomPrefixes = (ModernizrProto._config.usePrefixes ? omPrefixes.split(' ') : []);
ModernizrProto._cssomPrefixes = cssomPrefixes;
/**
* atRule returns a given CSS property at-rule (eg @keyframes), possibly in
* some prefixed form, or false, in the case of an unsupported rule
*
* @memberof Modernizr
* @name Modernizr.atRule
* @optionName Modernizr.atRule()
* @optionProp atRule
* @access public
* @function atRule
* @param {string} prop - String name of the @-rule to test for
* @returns {string|boolean} The string representing the (possibly prefixed)
* valid version of the @-rule, or `false` when it is unsupported.
* @example
* ```js
* var keyframes = Modernizr.atRule('@keyframes');
*
* if (keyframes) {
* // keyframes are supported
* // could be `@-webkit-keyframes` or `@keyframes`
* } else {
* // keyframes === `false`
* }
* ```
*
*/
var atRule = function(prop) {
var length = prefixes.length;
var cssrule = window.CSSRule;
var rule;
if (typeof cssrule === 'undefined') {
return undefined;
}
if (!prop) {
return false;
}
// remove literal @ from beginning of provided property
prop = prop.replace(/^@/, '');
// CSSRules use underscores instead of dashes
rule = prop.replace(/-/g, '_').toUpperCase() + '_RULE';
if (rule in cssrule) {
return '@' + prop;
}
for (var i = 0; i < length; i++) {
// prefixes gives us something like -o-, and we want O_
var prefix = prefixes[i];
var thisRule = prefix.toUpperCase() + '_' + rule;
if (thisRule in cssrule) {
return '@-' + prefix.toLowerCase() + '-' + prop;
}
}
return false;
};
ModernizrProto.atRule = atRule;
/**
* 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;
/**
* 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);
}
;
/**
* 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;
}
;
/**
* 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;
}
;
/**
* 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;
}
;
/**
* 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;
/**
* prefixed returns the prefixed or nonprefixed property name variant of your input
*
* @memberof Modernizr
* @name Modernizr.prefixed
* @optionName Modernizr.prefixed()
* @optionProp prefixed
* @access public
* @function prefixed
* @param {string} prop - String name of the property to test for
* @param {object} [obj] - An object to test for the prefixed properties on
* @param {HTMLElement} [elem] - An element used to test specific properties against
* @returns {string|false} The string representing the (possibly prefixed) valid
* version of the property, or `false` when it is unsupported.
* @example
*
* Modernizr.prefixed takes a string css value in the DOM style camelCase (as
* opposed to the css style kebab-case) form and returns the (possibly prefixed)
* version of that property that the browser actually supports.
*
* For example, in older Firefox...
* ```js
* prefixed('boxSizing')
* ```
* returns 'MozBoxSizing'
*
* In newer Firefox, as well as any other browser that support the unprefixed
* version would simply return `boxSizing`. Any browser that does not support
* the property at all, it will return `false`.
*
* By default, prefixed is checked against a DOM element. If you want to check
* for a property on another object, just pass it as a second argument
*
* ```js
* var rAF = prefixed('requestAnimationFrame', window);
*
* raf(function() {
* renderFunction();
* })
* ```
*
* Note that this will return _the actual function_ - not the name of the function.
* If you need the actual name of the property, pass in `false` as a third argument
*
* ```js
* var rAFProp = prefixed('requestAnimationFrame', window, false);
*
* rafProp === 'WebkitRequestAnimationFrame' // in older webkit
* ```
*
* One common use case for prefixed is if you're trying to determine which transition
* end event to bind to, you might do something like...
* ```js
* var transEndEventNames = {
* 'WebkitTransition' : 'webkitTransitionEnd', * Saf 6, Android Browser
* 'MozTransition' : 'transitionend', * only for FF < 15
* 'transition' : 'transitionend' * IE10, Opera, Chrome, FF 15+, Saf 7+
* };
*
* var transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];
* ```
*
* If you want a similar lookup, but in kebab-case, you can use [prefixedCSS](#modernizr-prefixedcss).
*/
var prefixed = ModernizrProto.prefixed = function(prop, obj, elem) {
if (prop.indexOf('@') === 0) {
return atRule(prop);
}
if (prop.indexOf('-') != -1) {
// Convert kebab-case to camelCase
prop = cssToDOM(prop);
}
if (!obj) {
return testPropsAll(prop, 'pfx');
} else {
// Testing DOM property e.g. Modernizr.prefixed('requestAnimationFrame', window) // 'mozRequestAnimationFrame'
return testPropsAll(prop, obj, elem);
}
};
/*!
{
"name": "Fullscreen API",
"property": "fullscreen",
"caniuse": "fullscreen",
"notes": [{
"name": "MDN documentation",
"href": "https://developer.mozilla.org/en/API/Fullscreen"
}],
"polyfills": ["screenfulljs"],
"builderAliases": ["fullscreen_api"]
}
!*/
/* DOC
Detects support for the ability to make the current website take over the user's entire screen
*/
// github.com/Modernizr/Modernizr/issues/739
Modernizr.addTest('fullscreen', !!(prefixed('exitFullscreen', document, false) || prefixed('cancelFullScreen', document, false)));
/**
* 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;
/*!
{
"name": "CSS Animations",
"property": "cssanimations",
"caniuse": "css-animation",
"polyfills": ["transformie", "csssandpaper"],
"tags": ["css"],
"warnings": ["Android < 4 will pass this test, but can only animate a single property at a time"],
"notes": [{
"name" : "Article: 'Dispelling the Android CSS animation myths'",
"href": "https://goo.gl/OGw5Gm"
}]
}
!*/
/* DOC
Detects whether or not elements can be animated using CSS
*/
Modernizr.addTest('cssanimations', testAllProps('animationName', 'a', true));
/*!
{
"name": "CSS Transforms",
"property": "csstransforms",
"caniuse": "transforms2d",
"tags": ["css"]
}
!*/
Modernizr.addTest('csstransforms', function() {
// Android < 3.0 is buggy, so we sniff and blacklist
// http://git.io/hHzL7w
return navigator.userAgent.indexOf('Android 2.') === -1 &&
testAllProps('transform', 'scale(1)', true);
});
// 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);
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