/*!
* Modernizr v2.8.3
* www.modernizr.com
*
* Copyright (c) Faruk Ates, Paul Irish, Alex Sexton
* Available under the BSD and MIT licenses: www.modernizr.com/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
* element. This information allows you to progressively enhance
* your pages with a granular level of control over the experience.
*
* Modernizr has an optional (not included) conditional resource loader
* called Modernizr.load(), based on Yepnope.js (yepnopejs.com).
* To get a build that includes Modernizr.load(), as well as choosing
* which tests to include, go to www.modernizr.com/download/
*
* Authors Faruk Ates, Paul Irish, Alex Sexton
* Contributors Ryan Seddon, Ben Alman
*/
window.Modernizr = (function( window, document, undefined ) {
var version = '2.8.3',
Modernizr = {},
/*>>cssclasses*/
// option for enabling the HTML classes to be added
enableClasses = true,
/*>>cssclasses*/
docElement = document.documentElement,
/**
* Create our "modernizr" element that we do most feature tests on.
*/
mod = 'modernizr',
modElem = document.createElement(mod),
mStyle = modElem.style,
/**
* Create the input element for various Web Forms feature tests.
*/
inputElem /*>>inputelem*/ = document.createElement('input') /*>>inputelem*/ ,
/*>>smile*/
smile = ':)',
/*>>smile*/
toString = {}.toString,
// TODO :: make the prefixes more granular
/*>>prefixes*/
// List of property values to set for css tests. See ticket #21
prefixes = ' -webkit- -moz- -o- -ms- '.split(' '),
/*>>prefixes*/
/*>>domprefixes*/
// Following spec is to expose vendor-specific style properties as:
// elem.style.WebkitBorderRadius
// and the following would be 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
omPrefixes = 'Webkit Moz O ms',
cssomPrefixes = omPrefixes.split(' '),
domPrefixes = omPrefixes.toLowerCase().split(' '),
/*>>domprefixes*/
/*>>ns*/
ns = {'svg': 'http://www.w3.org/2000/svg'},
/*>>ns*/
tests = {},
inputs = {},
attrs = {},
classes = [],
slice = classes.slice,
featureName, // used in testing loop
/*>>teststyles*/
// Inject element with style element and some CSS rules
injectElementWithStyles = function( rule, callback, nodes, testnames ) {
var style, ret, node, docOverflow,
div = document.createElement('div'),
// After page load injecting a fake body doesn't work so check if body exists
body = document.body,
// IE6 and 7 won't return offsetWidth or offsetHeight unless it's in the body element, so we fake it.
fakeBody = body || document.createElement('body');
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 = document.createElement('div');
node.id = testnames ? testnames[nodes] : mod + (nodes + 1);
div.appendChild(node);
}
}
// '].join('');
div.id = 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 ? div : fakeBody).innerHTML += style;
fakeBody.appendChild(div);
if ( !body ) {
//avoid crashing IE8, if background image is used
fakeBody.style.background = '';
//Safari 5.13/5.1.4 OSX stops loading if ::-webkit-scrollbar is used and scrollbars are visible
fakeBody.style.overflow = 'hidden';
docOverflow = docElement.style.overflow;
docElement.style.overflow = 'hidden';
docElement.appendChild(fakeBody);
}
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 ) {
fakeBody.parentNode.removeChild(fakeBody);
docElement.style.overflow = docOverflow;
} else {
div.parentNode.removeChild(div);
}
return !!ret;
},
/*>>teststyles*/
/*>>mq*/
// adapted from matchMedia polyfill
// by Scott Jehl and Paul Irish
// gist.github.com/786768
testMediaQuery = function( mq ) {
var matchMedia = window.matchMedia || window.msMatchMedia;
if ( matchMedia ) {
return matchMedia(mq) && matchMedia(mq).matches || false;
}
var bool;
injectElementWithStyles('@media ' + mq + ' { #' + mod + ' { position: absolute; } }', function( node ) {
bool = (window.getComputedStyle ?
getComputedStyle(node, null) :
node.currentStyle)['position'] == 'absolute';
});
return bool;
},
/*>>mq*/
/*>>hasevent*/
//
// isEventSupported determines if a given element supports the given event
// kangax.github.com/iseventsupported/
//
// The following results are known incorrects:
// Modernizr.hasEvent("webkitTransitionEnd", elem) // false negative
// Modernizr.hasEvent("textInput") // in Webkit. github.com/Modernizr/Modernizr/issues/333
// ...
isEventSupported = (function() {
var TAGNAMES = {
'select': 'input', 'change': 'input',
'submit': 'form', 'reset': 'form',
'error': 'img', 'load': 'img', 'abort': 'img'
};
function isEventSupported( eventName, element ) {
element = element || document.createElement(TAGNAMES[eventName] || 'div');
eventName = 'on' + eventName;
// When using `setAttribute`, IE skips "unload", WebKit skips "unload" and "resize", whereas `in` "catches" those
var isSupported = eventName in element;
if ( !isSupported ) {
// If it has no `setAttribute` (i.e. doesn't implement Node interface), try generic element
if ( !element.setAttribute ) {
element = document.createElement('div');
}
if ( element.setAttribute && element.removeAttribute ) {
element.setAttribute(eventName, '');
isSupported = is(element[eventName], 'function');
// If property was created, "remove it" (by setting value to `undefined`)
if ( !is(element[eventName], 'undefined') ) {
element[eventName] = undefined;
}
element.removeAttribute(eventName);
}
}
element = null;
return isSupported;
}
return isEventSupported;
})(),
/*>>hasevent*/
// TODO :: Add flag for hasownprop ? didn't last time
// hasOwnProperty shim by kangax needed for Safari 2.0 support
_hasOwnProperty = ({}).hasOwnProperty, hasOwnProp;
if ( !is(_hasOwnProperty, 'undefined') && !is(_hasOwnProperty.call, 'undefined') ) {
hasOwnProp = function (object, property) {
return _hasOwnProperty.call(object, property);
};
}
else {
hasOwnProp = function (object, property) { /* yes, this can give false positives/negatives, but most of the time we don't care about those */
return ((property in object) && is(object.constructor.prototype[property], 'undefined'));
};
}
// Adapted from ES5-shim https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js
// es5.github.com/#x15.3.4.5
if (!Function.prototype.bind) {
Function.prototype.bind = function bind(that) {
var target = this;
if (typeof target != "function") {
throw new TypeError();
}
var args = slice.call(arguments, 1),
bound = function () {
if (this instanceof bound) {
var F = function(){};
F.prototype = target.prototype;
var self = new F();
var result = target.apply(
self,
args.concat(slice.call(arguments))
);
if (Object(result) === result) {
return result;
}
return self;
} else {
return target.apply(
that,
args.concat(slice.call(arguments))
);
}
};
return bound;
};
}
/**
* setCss applies given styles to the Modernizr DOM node.
*/
function setCss( str ) {
mStyle.cssText = str;
}
/**
* setCssAll extrapolates all vendor-specific css strings.
*/
function setCssAll( str1, str2 ) {
return setCss(prefixes.join(str1 + ';') + ( str2 || '' ));
}
/**
* is returns a boolean for if typeof obj is exactly type.
*/
function is( obj, type ) {
return typeof obj === type;
}
/**
* contains returns a boolean for if substr is found within str.
*/
function contains( str, substr ) {
return !!~('' + str).indexOf(substr);
}
/*>>testprop*/
// 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.
// Because the testing of the CSS property names (with "-", as
// opposed to the camelCase DOM properties) is non-portable and
// non-standard but works in WebKit and IE (but not Gecko or Opera),
// we explicitly reject properties with dashes so that authors
// developing in WebKit or IE first don't end up with
// browser-specific content by accident.
function testProps( props, prefixed ) {
for ( var i in props ) {
var prop = props[i];
if ( !contains(prop, "-") && mStyle[prop] !== undefined ) {
return prefixed == 'pfx' ? prop : true;
}
}
return false;
}
/*>>testprop*/
// TODO :: add testDOMProps
/**
* testDOMProps is a generic DOM property test; if a browser supports
* a certain property, it won't return undefined for it.
*/
function testDOMProps( props, obj, elem ) {
for ( var i in props ) {
var item = obj[props[i]];
if ( item !== undefined) {
// return the property name as a string
if (elem === false) return props[i];
// let's bind a function
if (is(item, 'function')){
// default to autobind unless override
return item.bind(elem || obj);
}
// return the unbound function or obj or value
return item;
}
}
return false;
}
/*>>testallprops*/
/**
* 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.
*/
function testPropsAll( prop, prefixed, elem ) {
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);
// otherwise, they called .prefixed('requestAnimationFrame', window[, elem])
} else {
props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');
return testDOMProps(props, prefixed, elem);
}
}
/*>>testallprops*/
/**
* Tests
* -----
*/
// The *new* flexbox
// dev.w3.org/csswg/css3-flexbox
tests['flexbox'] = function() {
return testPropsAll('flexWrap');
};
// The *old* flexbox
// www.w3.org/TR/2009/WD-css3-flexbox-20090723/
tests['flexboxlegacy'] = function() {
return testPropsAll('boxDirection');
};
// 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/
tests['canvas'] = function() {
var elem = document.createElement('canvas');
return !!(elem.getContext && elem.getContext('2d'));
};
tests['canvastext'] = function() {
return !!(Modernizr['canvas'] && is(document.createElement('canvas').getContext('2d').fillText, 'function'));
};
// webk.it/70117 is tracking a legit WebGL feature detect proposal
// We do a soft detect which may false positive in order to avoid
// an expensive context creation: bugzil.la/732441
tests['webgl'] = function() {
return !!window.WebGLRenderingContext;
};
/*
* The Modernizr.touch test only indicates if the browser supports
* touch events, which does not necessarily reflect a touchscreen
* device, as evidenced by tablets running Windows 7 or, alas,
* the Palm Pre / WebOS (touch) phones.
*
* Additionally, Chrome (desktop) used to lie about its support on this,
* but that has since been rectified: crbug.com/36415
*
* We also test for Firefox 4 Multitouch Support.
*
* For more info, see: modernizr.github.com/Modernizr/touch.html
*/
tests['touch'] = function() {
var bool;
if(('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
bool = true;
} else {
injectElementWithStyles(['@media (',prefixes.join('touch-enabled),('),mod,')','{#modernizr{top:9px;position:absolute}}'].join(''), function( node ) {
bool = node.offsetTop === 9;
});
}
return bool;
};
// geolocation is often considered a trivial feature detect...
// Turns out, it's quite tricky to get right:
//
// Using !!navigator.geolocation does two things we don't want. It:
// 1. Leaks memory in IE9: github.com/Modernizr/Modernizr/issues/513
// 2. Disables page caching in WebKit: webk.it/43956
//
// Meanwhile, in Firefox < 8, an about:config setting could expose
// a false positive that would throw an exception: bugzil.la/688158
tests['geolocation'] = function() {
return 'geolocation' in navigator;
};
tests['postmessage'] = function() {
return !!window.postMessage;
};
// Chrome incognito mode used to throw an exception when using openDatabase
// It doesn't anymore.
tests['websqldatabase'] = function() {
return !!window.openDatabase;
};
// Vendors had inconsistent prefixing with the experimental Indexed DB:
// - Webkit's implementation is accessible through webkitIndexedDB
// - Firefox shipped moz_indexedDB before FF4b9, but since then has been mozIndexedDB
// For speed, we don't test the legacy (and beta-only) indexedDB
tests['indexedDB'] = function() {
return !!testPropsAll("indexedDB", window);
};
// documentMode logic from YUI to filter out IE8 Compat Mode
// which false positives.
tests['hashchange'] = function() {
return isEventSupported('hashchange', window) && (document.documentMode === undefined || document.documentMode > 7);
};
// Per 1.6:
// This used to be Modernizr.historymanagement but the longer
// name has been deprecated in favor of a shorter and property-matching one.
// The old API is still available in 1.6, but as of 2.0 will throw a warning,
// and in the first release thereafter disappear entirely.
tests['history'] = function() {
return !!(window.history && history.pushState);
};
tests['draganddrop'] = function() {
var div = document.createElement('div');
return ('draggable' in div) || ('ondragstart' in div && 'ondrop' in div);
};
// FF3.6 was EOL'ed on 4/24/12, but the ESR version of FF10
// will be supported until FF19 (2/12/13), at which time, ESR becomes FF17.
// FF10 still uses prefixes, so check for it until then.
// for more ESR info, see: mozilla.org/en-US/firefox/organizations/faq/
tests['websockets'] = function() {
return 'WebSocket' in window || 'MozWebSocket' in window;
};
// css-tricks.com/rgba-browser-support/
tests['rgba'] = function() {
// Set an rgba() color and check the returned value
setCss('background-color:rgba(150,255,150,.5)');
return contains(mStyle.backgroundColor, 'rgba');
};
tests['hsla'] = function() {
// Same as rgba(), in fact, browsers re-map hsla() to rgba() internally,
// except IE9 who retains it as hsla
setCss('background-color:hsla(120,40%,100%,.5)');
return contains(mStyle.backgroundColor, 'rgba') || contains(mStyle.backgroundColor, 'hsla');
};
tests['multiplebgs'] = function() {
// Setting multiple images AND a color on the background shorthand property
// and then querying the style.background property value for the number of
// occurrences of "url(" is a reliable method for detecting ACTUAL support for this!
setCss('background:url(https://),url(https://),red url(https://)');
// If the UA supports multiple backgrounds, there should be three occurrences
// of the string "url(" in the return value for elemStyle.background
return (/(url\s*\(.*?){3}/).test(mStyle.background);
};
// this will false positive in Opera Mini
// github.com/Modernizr/Modernizr/issues/396
tests['backgroundsize'] = function() {
return testPropsAll('backgroundSize');
};
tests['borderimage'] = function() {
return testPropsAll('borderImage');
};
// Super comprehensive table about all the unique implementations of
// border-radius: muddledramblings.com/table-of-css3-border-radius-compliance
tests['borderradius'] = function() {
return testPropsAll('borderRadius');
};
// WebOS unfortunately false positives on this test.
tests['boxshadow'] = function() {
return testPropsAll('boxShadow');
};
// FF3.0 will false positive on this test
tests['textshadow'] = function() {
return document.createElement('div').style.textShadow === '';
};
tests['opacity'] = function() {
// Browsers that actually have CSS Opacity implemented have done so
// according to spec, which means their return values are within the
// range of [0.0,1.0] - including the leading zero.
setCssAll('opacity:.55');
// The non-literal . in this regex is intentional:
// German Chrome returns this value as 0,55
// github.com/Modernizr/Modernizr/issues/#issue/59/comment/516632
return (/^0.55$/).test(mStyle.opacity);
};
// Note, Android < 4 will pass this test, but can only animate
// a single property at a time
// goo.gl/v3V4Gp
tests['cssanimations'] = function() {
return testPropsAll('animationName');
};
tests['csscolumns'] = function() {
return testPropsAll('columnCount');
};
tests['cssgradients'] = function() {
/**
* For CSS Gradients syntax, please see:
* webkit.org/blog/175/introducing-css-gradients/
* developer.mozilla.org/en/CSS/-moz-linear-gradient
* developer.mozilla.org/en/CSS/-moz-radial-gradient
* dev.w3.org/csswg/css3-images/#gradients-
*/
var str1 = 'background-image:',
str2 = 'gradient(linear,left top,right bottom,from(#9f9),to(white));',
str3 = 'linear-gradient(left top,#9f9, white);';
setCss(
// legacy webkit syntax (FIXME: remove when syntax not in use anymore)
(str1 + '-webkit- '.split(' ').join(str2 + str1) +
// standard syntax // trailing 'background-image:'
prefixes.join(str3 + str1)).slice(0, -str1.length)
);
return contains(mStyle.backgroundImage, 'gradient');
};
tests['cssreflections'] = function() {
return testPropsAll('boxReflect');
};
tests['csstransforms'] = function() {
return !!testPropsAll('transform');
};
tests['csstransforms3d'] = function() {
var ret = !!testPropsAll('perspective');
// Webkit's 3D transforms are passed off to the browser's own graphics renderer.
// It works fine in Safari on Leopard and Snow Leopard, but not in Chrome in
// some conditions. As a result, Webkit typically recognizes the syntax but
// will sometimes throw a false positive, thus we must do a more thorough check:
if ( ret && 'webkitPerspective' in docElement.style ) {
// Webkit allows this media query to succeed only if the feature is enabled.
// `@media (transform-3d),(-webkit-transform-3d){ ... }`
injectElementWithStyles('@media (transform-3d),(-webkit-transform-3d){#modernizr{left:9px;position:absolute;height:3px;}}', function( node, rule ) {
ret = node.offsetLeft === 9 && node.offsetHeight === 3;
});
}
return ret;
};
tests['csstransitions'] = function() {
return testPropsAll('transition');
};
/*>>fontface*/
// @font-face detection routine by Diego Perini
// javascript.nwbox.com/CSSSupport/
// false positives:
// WebOS github.com/Modernizr/Modernizr/issues/342
// WP7 github.com/Modernizr/Modernizr/issues/538
tests['fontface'] = function() {
var bool;
injectElementWithStyles('@font-face {font-family:"font";src:url("https://")}', function( node, rule ) {
var style = document.getElementById('smodernizr'),
sheet = style.sheet || style.styleSheet,
cssText = sheet ? (sheet.cssRules && sheet.cssRules[0] ? sheet.cssRules[0].cssText : sheet.cssText || '') : '';
bool = /src/i.test(cssText) && cssText.indexOf(rule.split(' ')[0]) === 0;
});
return bool;
};
/*>>fontface*/
// CSS generated content detection
tests['generatedcontent'] = function() {
var bool;
injectElementWithStyles(['#',mod,'{font:0/0 a}#',mod,':after{content:"',smile,'";visibility:hidden;font:3px/1 a}'].join(''), function( node ) {
bool = node.offsetHeight >= 3;
});
return bool;
};
// These tests evaluate support of the video/audio elements, as well as
// testing what types of content they support.
//
// We're using the Boolean constructor here, so that we can extend the value
// e.g. 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
tests['video'] = function() {
var elem = document.createElement('video'),
bool = false;
// IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
try {
if ( bool = !!elem.canPlayType ) {
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$/,'');
bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/,'');
}
} catch(e) { }
return bool;
};
tests['audio'] = function() {
var elem = document.createElement('audio'),
bool = false;
try {
if ( bool = !!elem.canPlayType ) {
bool = new Boolean(bool);
bool.ogg = elem.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/,'');
bool.mp3 = elem.canPlayType('audio/mpeg;') .replace(/^no$/,'');
// Mimetypes accepted:
// developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
// bit.ly/iphoneoscodecs
bool.wav = elem.canPlayType('audio/wav; codecs="1"') .replace(/^no$/,'');
bool.m4a = ( elem.canPlayType('audio/x-m4a;') ||
elem.canPlayType('audio/aac;')) .replace(/^no$/,'');
}
} catch(e) { }
return bool;
};
// 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
// Also in iOS5 Private Browsing mode, attempting to use localStorage.setItem
// will throw the exception:
// QUOTA_EXCEEDED_ERRROR 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
tests['localstorage'] = function() {
try {
localStorage.setItem(mod, mod);
localStorage.removeItem(mod);
return true;
} catch(e) {
return false;
}
};
tests['sessionstorage'] = function() {
try {
sessionStorage.setItem(mod, mod);
sessionStorage.removeItem(mod);
return true;
} catch(e) {
return false;
}
};
tests['webworkers'] = function() {
return !!window.Worker;
};
tests['applicationcache'] = function() {
return !!window.applicationCache;
};
// Thanks to Erik Dahlstrom
tests['svg'] = function() {
return !!document.createElementNS && !!document.createElementNS(ns.svg, 'svg').createSVGRect;
};
// specifically for SVG inline in HTML, not within XHTML
// test page: paulirish.com/demo/inline-svg
tests['inlinesvg'] = function() {
var div = document.createElement('div');
div.innerHTML = '';
return (div.firstChild && div.firstChild.namespaceURI) == ns.svg;
};
// SVG SMIL animation
tests['smil'] = function() {
return !!document.createElementNS && /SVGAnimate/.test(toString.call(document.createElementNS(ns.svg, 'animate')));
};
// This test is only for clip paths in SVG proper, not clip paths on HTML content
// demo: srufaculty.sru.edu/david.dailey/svg/newstuff/clipPath4.svg
// However read the comments to dig into applying SVG clippaths to HTML content here:
// github.com/Modernizr/Modernizr/issues/213#issuecomment-1149491
tests['svgclippaths'] = function() {
return !!document.createElementNS && /SVGClipPath/.test(toString.call(document.createElementNS(ns.svg, 'clipPath')));
};
/*>>webforms*/
// input features and input types go directly onto the ret object, bypassing the tests loop.
// Hold this guy to execute in a moment.
function webforms() {
/*>>input*/
// Run through HTML5's new input attributes to see if the UA understands any.
// We're using f which is the element created early on
// Mike Taylr has created a comprehensive resource for testing these attributes
// when applied to all input types:
// miketaylr.com/code/input-type-attr.html
// spec: www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
// Only input placeholder is tested while textarea's placeholder is not.
// Currently Safari 4 and Opera 11 have support only for the input placeholder
// Both tests are available in feature-detects/forms-placeholder.js
Modernizr['input'] = (function( props ) {
for ( var i = 0, len = props.length; i < len; i++ ) {
attrs[ props[i] ] = !!(props[i] in inputElem);
}
if (attrs.list){
// safari false positive's on datalist: webk.it/74252
// see also github.com/Modernizr/Modernizr/issues/146
attrs.list = !!(document.createElement('datalist') && window.HTMLDataListElement);
}
return attrs;
})('autocomplete autofocus list placeholder max min multiple pattern required step'.split(' '));
/*>>input*/
/*>>inputtypes*/
// Run through HTML5's new input types to see if the UA understands any.
// This is put behind the tests runloop because it doesn't return a
// true/false like all the other tests; instead, it returns an object
// containing each input type with its corresponding true/false value
// Big thanks to @miketaylr for the html5 forms expertise. miketaylr.com/
Modernizr['inputtypes'] = (function(props) {
for ( var i = 0, bool, inputElemType, defaultView, len = props.length; i < len; i++ ) {
inputElem.setAttribute('type', inputElemType = props[i]);
bool = inputElem.type !== 'text';
// We first check to see if the type we give it sticks..
// If the type does, we feed it a textual value, which shouldn't be valid.
// If the value doesn't stick, we know there's input sanitization which infers a custom UI
if ( bool ) {
inputElem.value = smile;
inputElem.style.cssText = 'position:absolute;visibility:hidden;';
if ( /^range$/.test(inputElemType) && inputElem.style.WebkitAppearance !== undefined ) {
docElement.appendChild(inputElem);
defaultView = document.defaultView;
// Safari 2-4 allows the smiley as a value, despite making a slider
bool = defaultView.getComputedStyle &&
defaultView.getComputedStyle(inputElem, null).WebkitAppearance !== 'textfield' &&
// Mobile android web browser has false positive, so must
// check the height to see if the widget is actually there.
(inputElem.offsetHeight !== 0);
docElement.removeChild(inputElem);
} else if ( /^(search|tel)$/.test(inputElemType) ){
// Spec doesn't define any special parsing or detectable UI
// behaviors so we pass these through as true
// Interestingly, opera fails the earlier test, so it doesn't
// even make it here.
} else if ( /^(url|email)$/.test(inputElemType) ) {
// Real url and email support comes with prebaked validation.
bool = inputElem.checkValidity && inputElem.checkValidity() === false;
} else {
// If the upgraded input compontent rejects the :) text, we got a winner
bool = inputElem.value != smile;
}
}
inputs[ props[i] ] = !!bool;
}
return inputs;
})('search tel url email datetime date month week time datetime-local number range color'.split(' '));
/*>>inputtypes*/
}
/*>>webforms*/
// End of test definitions
// -----------------------
// Run through all tests and detect their support in the current UA.
// todo: hypothetically we could be doing an array of tests and use a basic loop here.
for ( var feature in tests ) {
if ( hasOwnProp(tests, feature) ) {
// 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.
featureName = feature.toLowerCase();
Modernizr[featureName] = tests[feature]();
classes.push((Modernizr[featureName] ? '' : 'no-') + featureName);
}
}
/*>>webforms*/
// input tests need to run.
Modernizr.input || webforms();
/*>>webforms*/
/**
* addTest allows the user to define their own feature tests
* the result will be added onto the Modernizr object,
* as well as an appropriate className set on the html element
*
* @param feature - String naming the feature
* @param test - Function returning true if feature is supported, false if not
*/
Modernizr.addTest = function ( feature, test ) {
if ( typeof feature == 'object' ) {
for ( var key in feature ) {
if ( hasOwnProp( feature, key ) ) {
Modernizr.addTest( key, feature[ key ] );
}
}
} else {
feature = feature.toLowerCase();
if ( Modernizr[feature] !== undefined ) {
// we're going to quit if you're trying to overwrite an existing test
// if we were to allow it, we'd do this:
// var re = new RegExp("\\b(no-)?" + feature + "\\b");
// docElement.className = docElement.className.replace( re, '' );
// but, no rly, stuff 'em.
return Modernizr;
}
test = typeof test == 'function' ? test() : test;
if (typeof enableClasses !== "undefined" && enableClasses) {
docElement.className += ' ' + (test ? '' : 'no-') + feature;
}
Modernizr[feature] = test;
}
return Modernizr; // allow chaining.
};
// Reset modElem.cssText to nothing to reduce memory footprint.
setCss('');
modElem = inputElem = null;
/*>>shiv*/
/**
* @preserve HTML5 Shiv prev3.7.1 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
*/
;(function(window, document) {
/*jshint evil:true */
/** version */
var version = '3.7.0';
/** 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 = '';
//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';
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;
}
/**
* 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} 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>shiv*/
// Assign private properties to the return object with prefix
Modernizr._version = version;
// expose these for the plugin API. Look in the source for how to join() them against your input
/*>>prefixes*/
Modernizr._prefixes = prefixes;
/*>>prefixes*/
/*>>domprefixes*/
Modernizr._domPrefixes = domPrefixes;
Modernizr._cssomPrefixes = cssomPrefixes;
/*>>domprefixes*/
/*>>mq*/
// Modernizr.mq tests a given media query, live against the current state of the window
// A few important notes:
// * If a browser does not support media queries at all (eg. oldIE) the mq() will always return false
// * A max-width or orientation query will be evaluated against the current state, which may change later.
// * You must specify values. Eg. If you are testing support for the min-width media query use:
// Modernizr.mq('(min-width:0)')
// usage:
// Modernizr.mq('only screen and (max-width:768)')
Modernizr.mq = testMediaQuery;
/*>>mq*/
/*>>hasevent*/
// Modernizr.hasEvent() detects support for a given event, with an optional element to test on
// Modernizr.hasEvent('gesturestart', elem)
Modernizr.hasEvent = isEventSupported;
/*>>hasevent*/
/*>>testprop*/
// Modernizr.testProp() investigates whether a given style property is recognized
// Note that the property names must be provided in the camelCase variant.
// Modernizr.testProp('pointerEvents')
Modernizr.testProp = function(prop){
return testProps([prop]);
};
/*>>testprop*/
/*>>testallprops*/
// 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')
Modernizr.testAllProps = testPropsAll;
/*>>testallprops*/
/*>>teststyles*/
// Modernizr.testStyles() allows you to add custom styles to the document and test an element afterwards
// Modernizr.testStyles('#modernizr { position:absolute }', function(elem, rule){ ... })
Modernizr.testStyles = injectElementWithStyles;
/*>>teststyles*/
/*>>prefixed*/
// Modernizr.prefixed() returns the prefixed or nonprefixed property name variant of your input
// Modernizr.prefixed('boxSizing') // 'MozBoxSizing'
// Properties must be passed as dom-style camelcase, rather than `box-sizing` hypentated style.
// Return values will also be the camelCase variant, if you need to translate that to hypenated style use:
//
// str.replace(/([A-Z])/g, function(str,m1){ return '-' + m1.toLowerCase(); }).replace(/^ms-/,'-ms-');
// If you're trying to ascertain which transition end event to bind to, you might do something like...
//
// var transEndEventNames = {
// 'WebkitTransition' : 'webkitTransitionEnd',
// 'MozTransition' : 'transitionend',
// 'OTransition' : 'oTransitionEnd',
// 'msTransition' : 'MSTransitionEnd',
// 'transition' : 'transitionend'
// },
// transEndEventName = transEndEventNames[ Modernizr.prefixed('transition') ];
Modernizr.prefixed = function(prop, obj, elem){
if(!obj) {
return testPropsAll(prop, 'pfx');
} else {
// Testing DOM property e.g. Modernizr.prefixed('requestAnimationFrame', window) // 'mozRequestAnimationFrame'
return testPropsAll(prop, obj, elem);
}
};
/*>>prefixed*/
/*>>cssclasses*/
// Remove "no-js" class from element, if it exists:
docElement.className = docElement.className.replace(/(^|\s)no-js(\s|$)/, '$1$2') +
// Add the new classes to the element.
(enableClasses ? ' js ' + classes.join(' ') : '');
/*>>cssclasses*/
return Modernizr;
})(this, this.document);
/*! Picturefill - v3.0.2
* http://scottjehl.github.io/picturefill
* Copyright (c) 2015 https://github.com/scottjehl/picturefill/blob/master/Authors.txt;
* License: MIT
*/
(function( window, document, undefined ) {
// Enable strict mode
"use strict";
// HTML shim|v it for old IE (IE9 will still need the HTML video tag workaround)
document.createElement( "picture" );
var warn, eminpx, alwaysCheckWDescriptor, evalId;
// local object for method references and testing exposure
var pf = {};
var isSupportTestReady = false;
var noop = function() {};
var image = document.createElement( "img" );
var getImgAttr = image.getAttribute;
var setImgAttr = image.setAttribute;
var removeImgAttr = image.removeAttribute;
var docElem = document.documentElement;
var types = {};
var cfg = {
//resource selection:
algorithm: ""
};
var srcAttr = "data-pfsrc";
var srcsetAttr = srcAttr + "set";
// ua sniffing is done for undetectable img loading features,
// to do some non crucial perf optimizations
var ua = navigator.userAgent;
var supportAbort = (/rident/).test(ua) || ((/ecko/).test(ua) && ua.match(/rv\:(\d+)/) && RegExp.$1 > 35 );
var curSrcProp = "currentSrc";
var regWDesc = /\s+\+?\d+(e\d+)?w/;
var regSize = /(\([^)]+\))?\s*(.+)/;
var setOptions = window.picturefillCFG;
/**
* Shortcut property for https://w3c.github.io/webappsec/specs/mixedcontent/#restricts-mixed-content ( for easy overriding in tests )
*/
// baseStyle also used by getEmValue (i.e.: width: 1em is important)
var baseStyle = "position:absolute;left:0;visibility:hidden;display:block;padding:0;border:none;font-size:1em;width:1em;overflow:hidden;clip:rect(0px, 0px, 0px, 0px)";
var fsCss = "font-size:100%!important;";
var isVwDirty = true;
var cssCache = {};
var sizeLengthCache = {};
var DPR = window.devicePixelRatio;
var units = {
px: 1,
"in": 96
};
var anchor = document.createElement( "a" );
/**
* alreadyRun flag used for setOptions. is it true setOptions will reevaluate
* @type {boolean}
*/
var alreadyRun = false;
// Reusable, non-"g" Regexes
// (Don't use \s, to avoid matching non-breaking space.)
var regexLeadingSpaces = /^[ \t\n\r\u000c]+/,
regexLeadingCommasOrSpaces = /^[, \t\n\r\u000c]+/,
regexLeadingNotSpaces = /^[^ \t\n\r\u000c]+/,
regexTrailingCommas = /[,]+$/,
regexNonNegativeInteger = /^\d+$/,
// ( Positive or negative or unsigned integers or decimals, without or without exponents.
// Must include at least one digit.
// According to spec tests any decimal point must be followed by a digit.
// No leading plus sign is allowed.)
// https://html.spec.whatwg.org/multipage/infrastructure.html#valid-floating-point-number
regexFloatingPoint = /^-?(?:[0-9]+|[0-9]*\.[0-9]+)(?:[eE][+-]?[0-9]+)?$/;
var on = function(obj, evt, fn, capture) {
if ( obj.addEventListener ) {
obj.addEventListener(evt, fn, capture || false);
} else if ( obj.attachEvent ) {
obj.attachEvent( "on" + evt, fn);
}
};
/**
* simple memoize function:
*/
var memoize = function(fn) {
var cache = {};
return function(input) {
if ( !(input in cache) ) {
cache[ input ] = fn(input);
}
return cache[ input ];
};
};
// UTILITY FUNCTIONS
// Manual is faster than RegEx
// http://jsperf.com/whitespace-character/5
function isSpace(c) {
return (c === "\u0020" || // space
c === "\u0009" || // horizontal tab
c === "\u000A" || // new line
c === "\u000C" || // form feed
c === "\u000D"); // carriage return
}
/**
* gets a mediaquery and returns a boolean or gets a css length and returns a number
* @param css mediaqueries or css length
* @returns {boolean|number}
*
* based on: https://gist.github.com/jonathantneal/db4f77009b155f083738
*/
var evalCSS = (function() {
var regLength = /^([\d\.]+)(em|vw|px)$/;
var replace = function() {
var args = arguments, index = 0, string = args[0];
while (++index in args) {
string = string.replace(args[index], args[++index]);
}
return string;
};
var buildStr = memoize(function(css) {
return "return " + replace((css || "").toLowerCase(),
// interpret `and`
/\band\b/g, "&&",
// interpret `,`
/,/g, "||",
// interpret `min-` as >=
/min-([a-z-\s]+):/g, "e.$1>=",
// interpret `max-` as <=
/max-([a-z-\s]+):/g, "e.$1<=",
//calc value
/calc([^)]+)/g, "($1)",
// interpret css values
/(\d+[\.]*[\d]*)([a-z]+)/g, "($1 * e.$2)",
//make eval less evil
/^(?!(e.[a-z]|[0-9\.&=|><\+\-\*\(\)\/])).*/ig, ""
) + ";";
});
return function(css, length) {
var parsedLength;
if (!(css in cssCache)) {
cssCache[css] = false;
if (length && (parsedLength = css.match( regLength ))) {
cssCache[css] = parsedLength[ 1 ] * units[parsedLength[ 2 ]];
} else {
/*jshint evil:true */
try{
cssCache[css] = new Function("e", buildStr(css))(units);
} catch(e) {}
/*jshint evil:false */
}
}
return cssCache[css];
};
})();
var setResolution = function( candidate, sizesattr ) {
if ( candidate.w ) { // h = means height: || descriptor.type === 'h' do not handle yet...
candidate.cWidth = pf.calcListLength( sizesattr || "100vw" );
candidate.res = candidate.w / candidate.cWidth ;
} else {
candidate.res = candidate.d;
}
return candidate;
};
/**
*
* @param opt
*/
var picturefill = function( opt ) {
if (!isSupportTestReady) {return;}
var elements, i, plen;
var options = opt || {};
if ( options.elements && options.elements.nodeType === 1 ) {
if ( options.elements.nodeName.toUpperCase() === "IMG" ) {
options.elements = [ options.elements ];
} else {
options.context = options.elements;
options.elements = null;
}
}
elements = options.elements || pf.qsa( (options.context || document), ( options.reevaluate || options.reselect ) ? pf.sel : pf.selShort );
if ( (plen = elements.length) ) {
pf.setupRun( options );
alreadyRun = true;
// Loop through all elements
for ( i = 0; i < plen; i++ ) {
pf.fillImg(elements[ i ], options);
}
pf.teardownRun( options );
}
};
/**
* outputs a warning for the developer
* @param {message}
* @type {Function}
*/
warn = ( window.console && console.warn ) ?
function( message ) {
console.warn( message );
} :
noop
;
if ( !(curSrcProp in image) ) {
curSrcProp = "src";
}
// Add support for standard mime types.
types[ "image/jpeg" ] = true;
types[ "image/gif" ] = true;
types[ "image/png" ] = true;
function detectTypeSupport( type, typeUri ) {
// based on Modernizr's lossless img-webp test
// note: asynchronous
var image = new window.Image();
image.onerror = function() {
types[ type ] = false;
picturefill();
};
image.onload = function() {
types[ type ] = image.width === 1;
picturefill();
};
image.src = typeUri;
return "pending";
}
// test svg support
types[ "image/svg+xml" ] = document.implementation.hasFeature( "http://www.w3.org/TR/SVG11/feature#Image", "1.1" );
/**
* updates the internal vW property with the current viewport width in px
*/
function updateMetrics() {
isVwDirty = false;
DPR = window.devicePixelRatio;
cssCache = {};
sizeLengthCache = {};
pf.DPR = DPR || 1;
units.width = Math.max(window.innerWidth || 0, docElem.clientWidth);
units.height = Math.max(window.innerHeight || 0, docElem.clientHeight);
units.vw = units.width / 100;
units.vh = units.height / 100;
evalId = [ units.height, units.width, DPR ].join("-");
units.em = pf.getEmValue();
units.rem = units.em;
}
function chooseLowRes( lowerValue, higherValue, dprValue, isCached ) {
var bonusFactor, tooMuch, bonus, meanDensity;
//experimental
if (cfg.algorithm === "saveData" ){
if ( lowerValue > 2.7 ) {
meanDensity = dprValue + 1;
} else {
tooMuch = higherValue - dprValue;
bonusFactor = Math.pow(lowerValue - 0.6, 1.5);
bonus = tooMuch * bonusFactor;
if (isCached) {
bonus += 0.1 * bonusFactor;
}
meanDensity = lowerValue + bonus;
}
} else {
meanDensity = (dprValue > 1) ?
Math.sqrt(lowerValue * higherValue) :
lowerValue;
}
return meanDensity > dprValue;
}
function applyBestCandidate( img ) {
var srcSetCandidates;
var matchingSet = pf.getSet( img );
var evaluated = false;
if ( matchingSet !== "pending" ) {
evaluated = evalId;
if ( matchingSet ) {
srcSetCandidates = pf.setRes( matchingSet );
pf.applySetCandidate( srcSetCandidates, img );
}
}
img[ pf.ns ].evaled = evaluated;
}
function ascendingSort( a, b ) {
return a.res - b.res;
}
function setSrcToCur( img, src, set ) {
var candidate;
if ( !set && src ) {
set = img[ pf.ns ].sets;
set = set && set[set.length - 1];
}
candidate = getCandidateForSrc(src, set);
if ( candidate ) {
src = pf.makeUrl(src);
img[ pf.ns ].curSrc = src;
img[ pf.ns ].curCan = candidate;
if ( !candidate.res ) {
setResolution( candidate, candidate.set.sizes );
}
}
return candidate;
}
function getCandidateForSrc( src, set ) {
var i, candidate, candidates;
if ( src && set ) {
candidates = pf.parseSet( set );
src = pf.makeUrl(src);
for ( i = 0; i < candidates.length; i++ ) {
if ( src === pf.makeUrl(candidates[ i ].url) ) {
candidate = candidates[ i ];
break;
}
}
}
return candidate;
}
function getAllSourceElements( picture, candidates ) {
var i, len, source, srcset;
// SPEC mismatch intended for size and perf:
// actually only source elements preceding the img should be used
// also note: don't use qsa here, because IE8 sometimes doesn't like source as the key part in a selector
var sources = picture.getElementsByTagName( "source" );
for ( i = 0, len = sources.length; i < len; i++ ) {
source = sources[ i ];
source[ pf.ns ] = true;
srcset = source.getAttribute( "srcset" );
// if source does not have a srcset attribute, skip
if ( srcset ) {
candidates.push( {
srcset: srcset,
media: source.getAttribute( "media" ),
type: source.getAttribute( "type" ),
sizes: source.getAttribute( "sizes" )
} );
}
}
}
/**
* Srcset Parser
* By Alex Bell | MIT License
*
* @returns Array [{url: _, d: _, w: _, h:_, set:_(????)}, ...]
*
* Based super duper closely on the reference algorithm at:
* https://html.spec.whatwg.org/multipage/embedded-content.html#parse-a-srcset-attribute
*/
// 1. Let input be the value passed to this algorithm.
// (TO-DO : Explain what "set" argument is here. Maybe choose a more
// descriptive & more searchable name. Since passing the "set" in really has
// nothing to do with parsing proper, I would prefer this assignment eventually
// go in an external fn.)
function parseSrcset(input, set) {
function collectCharacters(regEx) {
var chars,
match = regEx.exec(input.substring(pos));
if (match) {
chars = match[ 0 ];
pos += chars.length;
return chars;
}
}
var inputLength = input.length,
url,
descriptors,
currentDescriptor,
state,
c,
// 2. Let position be a pointer into input, initially pointing at the start
// of the string.
pos = 0,
// 3. Let candidates be an initially empty source set.
candidates = [];
/**
* Adds descriptor properties to a candidate, pushes to the candidates array
* @return undefined
*/
// (Declared outside of the while loop so that it's only created once.
// (This fn is defined before it is used, in order to pass JSHINT.
// Unfortunately this breaks the sequencing of the spec comments. :/ )
function parseDescriptors() {
// 9. Descriptor parser: Let error be no.
var pError = false,
// 10. Let width be absent.
// 11. Let density be absent.
// 12. Let future-compat-h be absent. (We're implementing it now as h)
w, d, h, i,
candidate = {},
desc, lastChar, value, intVal, floatVal;
// 13. For each descriptor in descriptors, run the appropriate set of steps
// from the following list:
for (i = 0 ; i < descriptors.length; i++) {
desc = descriptors[ i ];
lastChar = desc[ desc.length - 1 ];
value = desc.substring(0, desc.length - 1);
intVal = parseInt(value, 10);
floatVal = parseFloat(value);
// If the descriptor consists of a valid non-negative integer followed by
// a U+0077 LATIN SMALL LETTER W character
if (regexNonNegativeInteger.test(value) && (lastChar === "w")) {
// If width and density are not both absent, then let error be yes.
if (w || d) {pError = true;}
// Apply the rules for parsing non-negative integers to the descriptor.
// If the result is zero, let error be yes.
// Otherwise, let width be the result.
if (intVal === 0) {pError = true;} else {w = intVal;}
// If the descriptor consists of a valid floating-point number followed by
// a U+0078 LATIN SMALL LETTER X character
} else if (regexFloatingPoint.test(value) && (lastChar === "x")) {
// If width, density and future-compat-h are not all absent, then let error
// be yes.
if (w || d || h) {pError = true;}
// Apply the rules for parsing floating-point number values to the descriptor.
// If the result is less than zero, let error be yes. Otherwise, let density
// be the result.
if (floatVal < 0) {pError = true;} else {d = floatVal;}
// If the descriptor consists of a valid non-negative integer followed by
// a U+0068 LATIN SMALL LETTER H character
} else if (regexNonNegativeInteger.test(value) && (lastChar === "h")) {
// If height and density are not both absent, then let error be yes.
if (h || d) {pError = true;}
// Apply the rules for parsing non-negative integers to the descriptor.
// If the result is zero, let error be yes. Otherwise, let future-compat-h
// be the result.
if (intVal === 0) {pError = true;} else {h = intVal;}
// Anything else, Let error be yes.
} else {pError = true;}
} // (close step 13 for loop)
// 15. If error is still no, then append a new image source to candidates whose
// URL is url, associated with a width width if not absent and a pixel
// density density if not absent. Otherwise, there is a parse error.
if (!pError) {
candidate.url = url;
if (w) { candidate.w = w;}
if (d) { candidate.d = d;}
if (h) { candidate.h = h;}
if (!h && !d && !w) {candidate.d = 1;}
if (candidate.d === 1) {set.has1x = true;}
candidate.set = set;
candidates.push(candidate);
}
} // (close parseDescriptors fn)
/**
* Tokenizes descriptor properties prior to parsing
* Returns undefined.
* (Again, this fn is defined before it is used, in order to pass JSHINT.
* Unfortunately this breaks the logical sequencing of the spec comments. :/ )
*/
function tokenize() {
// 8.1. Descriptor tokeniser: Skip whitespace
collectCharacters(regexLeadingSpaces);
// 8.2. Let current descriptor be the empty string.
currentDescriptor = "";
// 8.3. Let state be in descriptor.
state = "in descriptor";
while (true) {
// 8.4. Let c be the character at position.
c = input.charAt(pos);
// Do the following depending on the value of state.
// For the purpose of this step, "EOF" is a special character representing
// that position is past the end of input.
// In descriptor
if (state === "in descriptor") {
// Do the following, depending on the value of c:
// Space character
// If current descriptor is not empty, append current descriptor to
// descriptors and let current descriptor be the empty string.
// Set state to after descriptor.
if (isSpace(c)) {
if (currentDescriptor) {
descriptors.push(currentDescriptor);
currentDescriptor = "";
state = "after descriptor";
}
// U+002C COMMA (,)
// Advance position to the next character in input. If current descriptor
// is not empty, append current descriptor to descriptors. Jump to the step
// labeled descriptor parser.
} else if (c === ",") {
pos += 1;
if (currentDescriptor) {
descriptors.push(currentDescriptor);
}
parseDescriptors();
return;
// U+0028 LEFT PARENTHESIS (()
// Append c to current descriptor. Set state to in parens.
} else if (c === "\u0028") {
currentDescriptor = currentDescriptor + c;
state = "in parens";
// EOF
// If current descriptor is not empty, append current descriptor to
// descriptors. Jump to the step labeled descriptor parser.
} else if (c === "") {
if (currentDescriptor) {
descriptors.push(currentDescriptor);
}
parseDescriptors();
return;
// Anything else
// Append c to current descriptor.
} else {
currentDescriptor = currentDescriptor + c;
}
// (end "in descriptor"
// In parens
} else if (state === "in parens") {
// U+0029 RIGHT PARENTHESIS ())
// Append c to current descriptor. Set state to in descriptor.
if (c === ")") {
currentDescriptor = currentDescriptor + c;
state = "in descriptor";
// EOF
// Append current descriptor to descriptors. Jump to the step labeled
// descriptor parser.
} else if (c === "") {
descriptors.push(currentDescriptor);
parseDescriptors();
return;
// Anything else
// Append c to current descriptor.
} else {
currentDescriptor = currentDescriptor + c;
}
// After descriptor
} else if (state === "after descriptor") {
// Do the following, depending on the value of c:
// Space character: Stay in this state.
if (isSpace(c)) {
// EOF: Jump to the step labeled descriptor parser.
} else if (c === "") {
parseDescriptors();
return;
// Anything else
// Set state to in descriptor. Set position to the previous character in input.
} else {
state = "in descriptor";
pos -= 1;
}
}
// Advance position to the next character in input.
pos += 1;
// Repeat this step.
} // (close while true loop)
}
// 4. Splitting loop: Collect a sequence of characters that are space
// characters or U+002C COMMA characters. If any U+002C COMMA characters
// were collected, that is a parse error.
while (true) {
collectCharacters(regexLeadingCommasOrSpaces);
// 5. If position is past the end of input, return candidates and abort these steps.
if (pos >= inputLength) {
return candidates; // (we're done, this is the sole return path)
}
// 6. Collect a sequence of characters that are not space characters,
// and let that be url.
url = collectCharacters(regexLeadingNotSpaces);
// 7. Let descriptors be a new empty list.
descriptors = [];
// 8. If url ends with a U+002C COMMA character (,), follow these substeps:
// (1). Remove all trailing U+002C COMMA characters from url. If this removed
// more than one character, that is a parse error.
if (url.slice(-1) === ",") {
url = url.replace(regexTrailingCommas, "");
// (Jump ahead to step 9 to skip tokenization and just push the candidate).
parseDescriptors();
// Otherwise, follow these substeps:
} else {
tokenize();
} // (close else of step 8)
// 16. Return to the step labeled splitting loop.
} // (Close of big while loop.)
}
/*
* Sizes Parser
*
* By Alex Bell | MIT License
*
* Non-strict but accurate and lightweight JS Parser for the string value
*
* Reference algorithm at:
* https://html.spec.whatwg.org/multipage/embedded-content.html#parse-a-sizes-attribute
*
* Most comments are copied in directly from the spec
* (except for comments in parens).
*
* Grammar is:
* = # [ , ]? |
* =
* =
* http://www.w3.org/html/wg/drafts/html/master/embedded-content.html#attr-img-sizes
*
* E.g. "(max-width: 30em) 100vw, (max-width: 50em) 70vw, 100vw"
* or "(min-width: 30em), calc(30vw - 15px)" or just "30vw"
*
* Returns the first valid with a media condition that evaluates to true,
* or "100vw" if all valid media conditions evaluate to false.
*
*/
function parseSizes(strValue) {
// (Percentage CSS lengths are not allowed in this case, to avoid confusion:
// https://html.spec.whatwg.org/multipage/embedded-content.html#valid-source-size-list
// CSS allows a single optional plus or minus sign:
// http://www.w3.org/TR/CSS2/syndata.html#numbers
// CSS is ASCII case-insensitive:
// http://www.w3.org/TR/CSS2/syndata.html#characters )
// Spec allows exponential notation for type:
// http://dev.w3.org/csswg/css-values/#numbers
var regexCssLengthWithUnits = /^(?:[+-]?[0-9]+|[0-9]*\.[0-9]+)(?:[eE][+-]?[0-9]+)?(?:ch|cm|em|ex|in|mm|pc|pt|px|rem|vh|vmin|vmax|vw)$/i;
// (This is a quick and lenient test. Because of optional unlimited-depth internal
// grouping parens and strict spacing rules, this could get very complicated.)
var regexCssCalc = /^calc\((?:[0-9a-z \.\+\-\*\/\(\)]+)\)$/i;
var i;
var unparsedSizesList;
var unparsedSizesListLength;
var unparsedSize;
var lastComponentValue;
var size;
// UTILITY FUNCTIONS
// (Toy CSS parser. The goals here are:
// 1) expansive test coverage without the weight of a full CSS parser.
// 2) Avoiding regex wherever convenient.
// Quick tests: http://jsfiddle.net/gtntL4gr/3/
// Returns an array of arrays.)
function parseComponentValues(str) {
var chrctr;
var component = "";
var componentArray = [];
var listArray = [];
var parenDepth = 0;
var pos = 0;
var inComment = false;
function pushComponent() {
if (component) {
componentArray.push(component);
component = "";
}
}
function pushComponentArray() {
if (componentArray[0]) {
listArray.push(componentArray);
componentArray = [];
}
}
// (Loop forwards from the beginning of the string.)
while (true) {
chrctr = str.charAt(pos);
if (chrctr === "") { // ( End of string reached.)
pushComponent();
pushComponentArray();
return listArray;
} else if (inComment) {
if ((chrctr === "*") && (str[pos + 1] === "/")) { // (At end of a comment.)
inComment = false;
pos += 2;
pushComponent();
continue;
} else {
pos += 1; // (Skip all characters inside comments.)
continue;
}
} else if (isSpace(chrctr)) {
// (If previous character in loop was also a space, or if
// at the beginning of the string, do not add space char to
// component.)
if ( (str.charAt(pos - 1) && isSpace( str.charAt(pos - 1) ) ) || !component ) {
pos += 1;
continue;
} else if (parenDepth === 0) {
pushComponent();
pos +=1;
continue;
} else {
// (Replace any space character with a plain space for legibility.)
chrctr = " ";
}
} else if (chrctr === "(") {
parenDepth += 1;
} else if (chrctr === ")") {
parenDepth -= 1;
} else if (chrctr === ",") {
pushComponent();
pushComponentArray();
pos += 1;
continue;
} else if ( (chrctr === "/") && (str.charAt(pos + 1) === "*") ) {
inComment = true;
pos += 2;
continue;
}
component = component + chrctr;
pos += 1;
}
}
function isValidNonNegativeSourceSizeValue(s) {
if (regexCssLengthWithUnits.test(s) && (parseFloat(s) >= 0)) {return true;}
if (regexCssCalc.test(s)) {return true;}
// ( http://www.w3.org/TR/CSS2/syndata.html#numbers says:
// "-0 is equivalent to 0 and is not a negative number." which means that
// unitless zero and unitless negative zero must be accepted as special cases.)
if ((s === "0") || (s === "-0") || (s === "+0")) {return true;}
return false;
}
// When asked to parse a sizes attribute from an element, parse a
// comma-separated list of component values from the value of the element's
// sizes attribute (or the empty string, if the attribute is absent), and let
// unparsed sizes list be the result.
// http://dev.w3.org/csswg/css-syntax/#parse-comma-separated-list-of-component-values
unparsedSizesList = parseComponentValues(strValue);
unparsedSizesListLength = unparsedSizesList.length;
// For each unparsed size in unparsed sizes list:
for (i = 0; i < unparsedSizesListLength; i++) {
unparsedSize = unparsedSizesList[i];
// 1. Remove all consecutive s from the end of unparsed size.
// ( parseComponentValues() already omits spaces outside of parens. )
// If unparsed size is now empty, that is a parse error; continue to the next
// iteration of this algorithm.
// ( parseComponentValues() won't push an empty array. )
// 2. If the last component value in unparsed size is a valid non-negative
// , let size be its value and remove the component value
// from unparsed size. Any CSS function other than the calc() function is
// invalid. Otherwise, there is a parse error; continue to the next iteration
// of this algorithm.
// http://dev.w3.org/csswg/css-syntax/#parse-component-value
lastComponentValue = unparsedSize[unparsedSize.length - 1];
if (isValidNonNegativeSourceSizeValue(lastComponentValue)) {
size = lastComponentValue;
unparsedSize.pop();
} else {
continue;
}
// 3. Remove all consecutive s from the end of unparsed
// size. If unparsed size is now empty, return size and exit this algorithm.
// If this was not the last item in unparsed sizes list, that is a parse error.
if (unparsedSize.length === 0) {
return size;
}
// 4. Parse the remaining component values in unparsed size as a
// . If it does not parse correctly, or it does parse
// correctly but the evaluates to false, continue to the
// next iteration of this algorithm.
// (Parsing all possible compound media conditions in JS is heavy, complicated,
// and the payoff is unclear. Is there ever an situation where the
// media condition parses incorrectly but still somehow evaluates to true?
// Can we just rely on the browser/polyfill to do it?)
unparsedSize = unparsedSize.join(" ");
if (!(pf.matchesMedia( unparsedSize ) ) ) {
continue;
}
// 5. Return size and exit this algorithm.
return size;
}
// If the above algorithm exhausts unparsed sizes list without returning a
// size value, return 100vw.
return "100vw";
}
// namespace
pf.ns = ("pf" + new Date().getTime()).substr(0, 9);
// srcset support test
pf.supSrcset = "srcset" in image;
pf.supSizes = "sizes" in image;
pf.supPicture = !!window.HTMLPictureElement;
// UC browser does claim to support srcset and picture, but not sizes,
// this extended test reveals the browser does support nothing
if (pf.supSrcset && pf.supPicture && !pf.supSizes) {
(function(image2) {
image.srcset = "data:,a";
image2.src = "data:,a";
pf.supSrcset = image.complete === image2.complete;
pf.supPicture = pf.supSrcset && pf.supPicture;
})(document.createElement("img"));
}
// Safari9 has basic support for sizes, but does't expose the `sizes` idl attribute
if (pf.supSrcset && !pf.supSizes) {
(function() {
var width2 = "data:image/gif;base64,R0lGODlhAgABAPAAAP///wAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==";
var width1 = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
var img = document.createElement("img");
var test = function() {
var width = img.width;
if (width === 2) {
pf.supSizes = true;
}
alwaysCheckWDescriptor = pf.supSrcset && !pf.supSizes;
isSupportTestReady = true;
// force async
setTimeout(picturefill);
};
img.onload = test;
img.onerror = test;
img.setAttribute("sizes", "9px");
img.srcset = width1 + " 1w," + width2 + " 9w";
img.src = width1;
})();
} else {
isSupportTestReady = true;
}
// using pf.qsa instead of dom traversing does scale much better,
// especially on sites mixing responsive and non-responsive images
pf.selShort = "picture>img,img[srcset]";
pf.sel = pf.selShort;
pf.cfg = cfg;
/**
* Shortcut property for `devicePixelRatio` ( for easy overriding in tests )
*/
pf.DPR = (DPR || 1 );
pf.u = units;
// container of supported mime types that one might need to qualify before using
pf.types = types;
pf.setSize = noop;
/**
* Gets a string and returns the absolute URL
* @param src
* @returns {String} absolute URL
*/
pf.makeUrl = memoize(function(src) {
anchor.href = src;
return anchor.href;
});
/**
* Gets a DOM element or document and a selctor and returns the found matches
* Can be extended with jQuery/Sizzle for IE7 support
* @param context
* @param sel
* @returns {NodeList|Array}
*/
pf.qsa = function(context, sel) {
return ( "querySelector" in context ) ? context.querySelectorAll(sel) : [];
};
/**
* Shortcut method for matchMedia ( for easy overriding in tests )
* wether native or pf.mMQ is used will be decided lazy on first call
* @returns {boolean}
*/
pf.matchesMedia = function() {
if ( window.matchMedia && (matchMedia( "(min-width: 0.1em)" ) || {}).matches ) {
pf.matchesMedia = function( media ) {
return !media || ( matchMedia( media ).matches );
};
} else {
pf.matchesMedia = pf.mMQ;
}
return pf.matchesMedia.apply( this, arguments );
};
/**
* A simplified matchMedia implementation for IE8 and IE9
* handles only min-width/max-width with px or em values
* @param media
* @returns {boolean}
*/
pf.mMQ = function( media ) {
return media ? evalCSS(media) : true;
};
/**
* Returns the calculated length in css pixel from the given sourceSizeValue
* http://dev.w3.org/csswg/css-values-3/#length-value
* intended Spec mismatches:
* * Does not check for invalid use of CSS functions
* * Does handle a computed length of 0 the same as a negative and therefore invalid value
* @param sourceSizeValue
* @returns {Number}
*/
pf.calcLength = function( sourceSizeValue ) {
var value = evalCSS(sourceSizeValue, true) || false;
if (value < 0) {
value = false;
}
return value;
};
/**
* Takes a type string and checks if its supported
*/
pf.supportsType = function( type ) {
return ( type ) ? types[ type ] : true;
};
/**
* Parses a sourceSize into mediaCondition (media) and sourceSizeValue (length)
* @param sourceSizeStr
* @returns {*}
*/
pf.parseSize = memoize(function( sourceSizeStr ) {
var match = ( sourceSizeStr || "" ).match(regSize);
return {
media: match && match[1],
length: match && match[2]
};
});
pf.parseSet = function( set ) {
if ( !set.cands ) {
set.cands = parseSrcset(set.srcset, set);
}
return set.cands;
};
/**
* returns 1em in css px for html/body default size
* function taken from respondjs
* @returns {*|number}
*/
pf.getEmValue = function() {
var body;
if ( !eminpx && (body = document.body) ) {
var div = document.createElement( "div" ),
originalHTMLCSS = docElem.style.cssText,
originalBodyCSS = body.style.cssText;
div.style.cssText = baseStyle;
// 1em in a media query is the value of the default font size of the browser
// reset docElem and body to ensure the correct value is returned
docElem.style.cssText = fsCss;
body.style.cssText = fsCss;
body.appendChild( div );
eminpx = div.offsetWidth;
body.removeChild( div );
//also update eminpx before returning
eminpx = parseFloat( eminpx, 10 );
// restore the original values
docElem.style.cssText = originalHTMLCSS;
body.style.cssText = originalBodyCSS;
}
return eminpx || 16;
};
/**
* Takes a string of sizes and returns the width in pixels as a number
*/
pf.calcListLength = function( sourceSizeListStr ) {
// Split up source size list, ie ( max-width: 30em ) 100%, ( max-width: 50em ) 50%, 33%
//
// or (min-width:30em) calc(30% - 15px)
if ( !(sourceSizeListStr in sizeLengthCache) || cfg.uT ) {
var winningLength = pf.calcLength( parseSizes( sourceSizeListStr ) );
sizeLengthCache[ sourceSizeListStr ] = !winningLength ? units.width : winningLength;
}
return sizeLengthCache[ sourceSizeListStr ];
};
/**
* Takes a candidate object with a srcset property in the form of url/
* ex. "images/pic-medium.png 1x, images/pic-medium-2x.png 2x" or
* "images/pic-medium.png 400w, images/pic-medium-2x.png 800w" or
* "images/pic-small.png"
* Get an array of image candidates in the form of
* {url: "/foo/bar.png", resolution: 1}
* where resolution is http://dev.w3.org/csswg/css-values-3/#resolution-value
* If sizes is specified, res is calculated
*/
pf.setRes = function( set ) {
var candidates;
if ( set ) {
candidates = pf.parseSet( set );
for ( var i = 0, len = candidates.length; i < len; i++ ) {
setResolution( candidates[ i ], set.sizes );
}
}
return candidates;
};
pf.setRes.res = setResolution;
pf.applySetCandidate = function( candidates, img ) {
if ( !candidates.length ) {return;}
var candidate,
i,
j,
length,
bestCandidate,
curSrc,
curCan,
candidateSrc,
abortCurSrc;
var imageData = img[ pf.ns ];
var dpr = pf.DPR;
curSrc = imageData.curSrc || img[curSrcProp];
curCan = imageData.curCan || setSrcToCur(img, curSrc, candidates[0].set);
// if we have a current source, we might either become lazy or give this source some advantage
if ( curCan && curCan.set === candidates[ 0 ].set ) {
// if browser can abort image request and the image has a higher pixel density than needed
// and this image isn't downloaded yet, we skip next part and try to save bandwidth
abortCurSrc = (supportAbort && !img.complete && curCan.res - 0.1 > dpr);
if ( !abortCurSrc ) {
curCan.cached = true;
// if current candidate is "best", "better" or "okay",
// set it to bestCandidate
if ( curCan.res >= dpr ) {
bestCandidate = curCan;
}
}
}
if ( !bestCandidate ) {
candidates.sort( ascendingSort );
length = candidates.length;
bestCandidate = candidates[ length - 1 ];
for ( i = 0; i < length; i++ ) {
candidate = candidates[ i ];
if ( candidate.res >= dpr ) {
j = i - 1;
// we have found the perfect candidate,
// but let's improve this a little bit with some assumptions ;-)
if (candidates[ j ] &&
(abortCurSrc || curSrc !== pf.makeUrl( candidate.url )) &&
chooseLowRes(candidates[ j ].res, candidate.res, dpr, candidates[ j ].cached)) {
bestCandidate = candidates[ j ];
} else {
bestCandidate = candidate;
}
break;
}
}
}
if ( bestCandidate ) {
candidateSrc = pf.makeUrl( bestCandidate.url );
imageData.curSrc = candidateSrc;
imageData.curCan = bestCandidate;
if ( candidateSrc !== curSrc ) {
pf.setSrc( img, bestCandidate );
}
pf.setSize( img );
}
};
pf.setSrc = function( img, bestCandidate ) {
var origWidth;
img.src = bestCandidate.url;
// although this is a specific Safari issue, we don't want to take too much different code paths
if ( bestCandidate.set.type === "image/svg+xml" ) {
origWidth = img.style.width;
img.style.width = (img.offsetWidth + 1) + "px";
// next line only should trigger a repaint
// if... is only done to trick dead code removal
if ( img.offsetWidth + 1 ) {
img.style.width = origWidth;
}
}
};
pf.getSet = function( img ) {
var i, set, supportsType;
var match = false;
var sets = img [ pf.ns ].sets;
for ( i = 0; i < sets.length && !match; i++ ) {
set = sets[i];
if ( !set.srcset || !pf.matchesMedia( set.media ) || !(supportsType = pf.supportsType( set.type )) ) {
continue;
}
if ( supportsType === "pending" ) {
set = supportsType;
}
match = set;
break;
}
return match;
};
pf.parseSets = function( element, parent, options ) {
var srcsetAttribute, imageSet, isWDescripor, srcsetParsed;
var hasPicture = parent && parent.nodeName.toUpperCase() === "PICTURE";
var imageData = element[ pf.ns ];
if ( imageData.src === undefined || options.src ) {
imageData.src = getImgAttr.call( element, "src" );
if ( imageData.src ) {
setImgAttr.call( element, srcAttr, imageData.src );
} else {
removeImgAttr.call( element, srcAttr );
}
}
if ( imageData.srcset === undefined || options.srcset || !pf.supSrcset || element.srcset ) {
srcsetAttribute = getImgAttr.call( element, "srcset" );
imageData.srcset = srcsetAttribute;
srcsetParsed = true;
}
imageData.sets = [];
if ( hasPicture ) {
imageData.pic = true;
getAllSourceElements( parent, imageData.sets );
}
if ( imageData.srcset ) {
imageSet = {
srcset: imageData.srcset,
sizes: getImgAttr.call( element, "sizes" )
};
imageData.sets.push( imageSet );
isWDescripor = (alwaysCheckWDescriptor || imageData.src) && regWDesc.test(imageData.srcset || "");
// add normal src as candidate, if source has no w descriptor
if ( !isWDescripor && imageData.src && !getCandidateForSrc(imageData.src, imageSet) && !imageSet.has1x ) {
imageSet.srcset += ", " + imageData.src;
imageSet.cands.push({
url: imageData.src,
d: 1,
set: imageSet
});
}
} else if ( imageData.src ) {
imageData.sets.push( {
srcset: imageData.src,
sizes: null
} );
}
imageData.curCan = null;
imageData.curSrc = undefined;
// if img has picture or the srcset was removed or has a srcset and does not support srcset at all
// or has a w descriptor (and does not support sizes) set support to false to evaluate
imageData.supported = !( hasPicture || ( imageSet && !pf.supSrcset ) || (isWDescripor && !pf.supSizes) );
if ( srcsetParsed && pf.supSrcset && !imageData.supported ) {
if ( srcsetAttribute ) {
setImgAttr.call( element, srcsetAttr, srcsetAttribute );
element.srcset = "";
} else {
removeImgAttr.call( element, srcsetAttr );
}
}
if (imageData.supported && !imageData.srcset && ((!imageData.src && element.src) || element.src !== pf.makeUrl(imageData.src))) {
if (imageData.src === null) {
element.removeAttribute("src");
} else {
element.src = imageData.src;
}
}
imageData.parsed = true;
};
pf.fillImg = function(element, options) {
var imageData;
var extreme = options.reselect || options.reevaluate;
// expando for caching data on the img
if ( !element[ pf.ns ] ) {
element[ pf.ns ] = {};
}
imageData = element[ pf.ns ];
// if the element has already been evaluated, skip it
// unless `options.reevaluate` is set to true ( this, for example,
// is set to true when running `picturefill` on `resize` ).
if ( !extreme && imageData.evaled === evalId ) {
return;
}
if ( !imageData.parsed || options.reevaluate ) {
pf.parseSets( element, element.parentNode, options );
}
if ( !imageData.supported ) {
applyBestCandidate( element );
} else {
imageData.evaled = evalId;
}
};
pf.setupRun = function() {
if ( !alreadyRun || isVwDirty || (DPR !== window.devicePixelRatio) ) {
updateMetrics();
}
};
// If picture is supported, well, that's awesome.
if ( pf.supPicture ) {
picturefill = noop;
pf.fillImg = noop;
} else {
// Set up picture polyfill by polling the document
(function() {
var isDomReady;
var regReady = window.attachEvent ? /d$|^c/ : /d$|^c|^i/;
var run = function() {
var readyState = document.readyState || "";
timerId = setTimeout(run, readyState === "loading" ? 200 : 999);
if ( document.body ) {
pf.fillImgs();
isDomReady = isDomReady || regReady.test(readyState);
if ( isDomReady ) {
clearTimeout( timerId );
}
}
};
var timerId = setTimeout(run, document.body ? 9 : 99);
// Also attach picturefill on resize and readystatechange
// http://modernjavascript.blogspot.com/2013/08/building-better-debounce.html
var debounce = function(func, wait) {
var timeout, timestamp;
var later = function() {
var last = (new Date()) - timestamp;
if (last < wait) {
timeout = setTimeout(later, wait - last);
} else {
timeout = null;
func();
}
};
return function() {
timestamp = new Date();
if (!timeout) {
timeout = setTimeout(later, wait);
}
};
};
var lastClientWidth = docElem.clientHeight;
var onResize = function() {
isVwDirty = Math.max(window.innerWidth || 0, docElem.clientWidth) !== units.width || docElem.clientHeight !== lastClientWidth;
lastClientWidth = docElem.clientHeight;
if ( isVwDirty ) {
pf.fillImgs();
}
};
on( window, "resize", debounce(onResize, 99 ) );
on( document, "readystatechange", run );
})();
}
pf.picturefill = picturefill;
//use this internally for easy monkey patching/performance testing
pf.fillImgs = picturefill;
pf.teardownRun = noop;
/* expose methods for testing */
picturefill._ = pf;
window.picturefillCFG = {
pf: pf,
push: function(args) {
var name = args.shift();
if (typeof pf[name] === "function") {
pf[name].apply(pf, args);
} else {
cfg[name] = args[0];
if (alreadyRun) {
pf.fillImgs( { reselect: true } );
}
}
}
};
while (setOptions && setOptions.length) {
window.picturefillCFG.push(setOptions.shift());
}
/* expose picturefill */
window.picturefill = picturefill;
/* expose picturefill */
if ( typeof module === "object" && typeof module.exports === "object" ) {
// CommonJS, just export
module.exports = picturefill;
} else if ( typeof define === "function" && define.amd ) {
// AMD support
define( "picturefill", function() { return picturefill; } );
}
// IE8 evals this sync, so it must be the last thing we do
if ( !pf.supPicture ) {
types[ "image/webp" ] = detectTypeSupport("image/webp", "data:image/webp;base64,UklGRkoAAABXRUJQVlA4WAoAAAAQAAAAAAAAAAAAQUxQSAwAAAABBxAR/Q9ERP8DAABWUDggGAAAADABAJ0BKgEAAQADADQlpAADcAD++/1QAA==" );
}
} )( window, document );
// decrypt helper function
function decryptCharcode(n,start,end,offset) {
n = n + offset;
if (offset > 0 && n > end) {
n = start + (n - end - 1);
} else if (offset < 0 && n < start) {
n = end - (start - n - 1);
}
return String.fromCharCode(n);
}
// decrypt string
function decryptString(enc,offset) {
var dec = "";
var len = enc.length;
for(var i=0; i < len; i++) {
var n = enc.charCodeAt(i);
if (n >= 0x2B && n <= 0x3A) {
dec += decryptCharcode(n,0x2B,0x3A,offset); // 0-9 . , - + / :
} else if (n >= 0x40 && n <= 0x5A) {
dec += decryptCharcode(n,0x40,0x5A,offset); // A-Z @
} else if (n >= 0x61 && n <= 0x7A) {
dec += decryptCharcode(n,0x61,0x7A,offset); // a-z
} else {
dec += enc.charAt(i);
}
}
return dec;
}
// decrypt spam-protected emails
function linkTo_UnCryptMailto(s) {
location.href = decryptString(s,3);
}
document.cookie = 'spamshield=true' ;