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|
/*!
* Modernizr v1.7
* http://www.modernizr.com
*
* Developed by:
* - Faruk Ates http://farukat.es/
* - Paul Irish http://paulirish.com/
*
* Copyright (c) 2009-2011
* Dual-licensed under the BSD or MIT licenses.
* http://www.modernizr.com/license/
*/
/*
* Modernizr is a script that detects native CSS3 and HTML5 features
* available in the current UA and provides an object containing all
* features with a true/false value, depending on whether the UA has
* native support for it or not.
*
* Modernizr will also add classes to the <html> element of the page,
* one for each feature it detects. If the UA supports it, a class
* like "cssgradients" will be added. If not, the class name will be
* "no-cssgradients". This allows for simple if-conditionals in your
* CSS, giving you fine control over the look & feel of your website.
*
* @author Faruk Ates
* @author Paul Irish
* @copyright (c) 2009-2011 Faruk Ates.
* @contributor Ben Alman
*/
window.Modernizr = (function(window,document,undefined){
var version = '1.7',
ret = {},
/**
* !! DEPRECATED !!
*
* enableHTML5 is a private property for advanced use only. If enabled,
* it will make Modernizr.init() run through a brief while() loop in
* which it will create all HTML5 elements in the DOM to allow for
* styling them in Internet Explorer, which does not recognize any
* non-HTML4 elements unless created in the DOM this way.
*
* enableHTML5 is ON by default.
*
* The enableHTML5 toggle option is DEPRECATED as per 1.6, and will be
* replaced in 2.0 in lieu of the modular, configurable nature of 2.0.
*/
enableHTML5 = true,
docElement = document.documentElement,
docHead = document.head || document.getElementsByTagName('head')[0],
/**
* Create our "modernizr" element that we do most feature tests on.
*/
mod = 'modernizr',
modElem = document.createElement( mod ),
m_style = modElem.style,
/**
* Create the input element for various Web Forms feature tests.
*/
inputElem = document.createElement( 'input' ),
smile = ':)',
tostring = Object.prototype.toString,
// List of property values to set for css tests. See ticket #21
prefixes = ' -webkit- -moz- -o- -ms- -khtml- '.split(' '),
// 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 foregoes prefixes entirely <= IE8, but appears to
// use a lowercase `ms` instead of the correct `Ms` in IE9
// More here: http://github.com/Modernizr/Modernizr/issues/issue/21
domPrefixes = 'Webkit Moz O ms Khtml'.split(' '),
ns = {'svg': 'http://www.w3.org/2000/svg'},
tests = {},
inputs = {},
attrs = {},
classes = [],
featurename, // used in testing loop
// todo: consider using http://javascript.nwbox.com/CSSSupport/css-support.js instead
testMediaQuery = function(mq){
var st = document.createElement('style'),
div = document.createElement('div'),
ret;
st.textContent = mq + '{#modernizr{height:3px}}';
docHead.appendChild(st);
div.id = 'modernizr';
docElement.appendChild(div);
ret = div.offsetHeight === 3;
st.parentNode.removeChild(st);
div.parentNode.removeChild(div);
return !!ret;
},
/**
* isEventSupported determines if a given element supports the given event
* function from http://yura.thinkweb2.com/isEventSupported/
*/
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;
})();
// hasOwnProperty shim by kangax needed for Safari 2.0 support
var _hasOwnProperty = ({}).hasOwnProperty, hasOwnProperty;
if (!is(_hasOwnProperty, undefined) && !is(_hasOwnProperty.call, undefined)) {
hasOwnProperty = function (object, property) {
return _hasOwnProperty.call(object, property);
};
}
else {
hasOwnProperty = 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));
};
}
/**
* set_css applies given styles to the Modernizr DOM node.
*/
function set_css( str ) {
m_style.cssText = str;
}
/**
* set_css_all extrapolates all vendor-specific css strings.
*/
function set_css_all( str1, str2 ) {
return set_css(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 ) !== -1;
}
/**
* test_props is a generic CSS / DOM property test; if a browser supports
* a certain property, it won't return undefined for it.
* A supported CSS property returns empty string when its not yet set.
*/
function test_props( props, callback ) {
for ( var i in props ) {
if ( m_style[ props[i] ] !== undefined && ( !callback || callback( props[i], modElem ) ) ) {
return true;
}
}
}
/**
* test_props_all 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 test_props_all( prop, callback ) {
var uc_prop = prop.charAt(0).toUpperCase() + prop.substr(1),
props = (prop + ' ' + domPrefixes.join(uc_prop + ' ') + uc_prop).split(' ');
return !!test_props( props, callback );
}
/**
* Tests
* -----
*/
tests['flexbox'] = function() {
/**
* set_prefixed_value_css sets the property of a specified element
* adding vendor prefixes to the VALUE of the property.
* @param {Element} element
* @param {string} property The property name. This will not be prefixed.
* @param {string} value The value of the property. This WILL be prefixed.
* @param {string=} extra Additional CSS to append unmodified to the end of
* the CSS string.
*/
function set_prefixed_value_css(element, property, value, extra) {
property += ':';
element.style.cssText = (property + prefixes.join(value + ';' + property)).slice(0, -property.length) + (extra || '');
}
/**
* set_prefixed_property_css sets the property of a specified element
* adding vendor prefixes to the NAME of the property.
* @param {Element} element
* @param {string} property The property name. This WILL be prefixed.
* @param {string} value The value of the property. This will not be prefixed.
* @param {string=} extra Additional CSS to append unmodified to the end of
* the CSS string.
*/
function set_prefixed_property_css(element, property, value, extra) {
element.style.cssText = prefixes.join(property + ':' + value + ';') + (extra || '');
}
var c = document.createElement('div'),
elem = document.createElement('div');
set_prefixed_value_css(c, 'display', 'box', 'width:42px;padding:0;');
set_prefixed_property_css(elem, 'box-flex', '1', 'width:10px;');
c.appendChild(elem);
docElement.appendChild(c);
var ret = elem.offsetWidth === 42;
c.removeChild(elem);
docElement.removeChild(c);
return ret;
};
// On the S60 and BB Storm, getContext exists, but always returns undefined
// http://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 !!(ret['canvas'] && is(document.createElement( 'canvas' ).getContext('2d').fillText, 'function'));
};
// This WebGL test false positives in FF depending on graphics hardware. But really it's quite impossible to know
// wether webgl will succeed until after you create the context. You might have hardware that can support
// a 100x100 webgl canvas, but will not support a 1000x1000 webgl canvas. So this feature inference is weak,
// but intentionally so.
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: http://crbug.com/36415
*
* We also test for Firefox 4 Multitouch Support.
*
* For more info, see: http://modernizr.github.com/Modernizr/touch.html
*/
tests['touch'] = function() {
return ('ontouchstart' in window) || testMediaQuery('@media ('+prefixes.join('touch-enabled),(')+'modernizr)');
};
/**
* geolocation tests for the new Geolocation API specification.
* This test is a standards compliant-only test; for more complete
* testing, including a Google Gears fallback, please see:
* http://code.google.com/p/geo-location-javascript/
* or view a fallback solution using google's geo API:
* http://gist.github.com/366184
*/
tests['geolocation'] = function() {
return !!navigator.geolocation;
};
// Per 1.6:
// This used to be Modernizr.crosswindowmessaging 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['postmessage'] = function() {
return !!window.postMessage;
};
// Web SQL database detection is tricky:
// In chrome incognito mode, openDatabase is truthy, but using it will
// throw an exception: http://crbug.com/42380
// We can create a dummy database, but there is no way to delete it afterwards.
// Meanwhile, Safari users can get prompted on any database creation.
// If they do, any page with Modernizr will give them a prompt:
// http://github.com/Modernizr/Modernizr/issues/closed#issue/113
// We have chosen to allow the Chrome incognito false positive, so that Modernizr
// doesn't litter the web with these test databases. As a developer, you'll have
// to account for this gotcha yourself.
tests['websqldatabase'] = function() {
var result = !!window.openDatabase;
/* if (result){
try {
result = !!openDatabase( mod + "testdb", "1.0", mod + "testdb", 2e4);
} catch(e) {
}
} */
return result;
};
// Vendors have inconsistent prefixing with the experimental Indexed DB:
// - Firefox is shipping indexedDB in FF4 as moz_indexedDB
// - Webkit's implementation is accessible through webkitIndexedDB
// We test both styles.
tests['indexedDB'] = function(){
for (var i = -1, len = domPrefixes.length; ++i < len; ){
var prefix = domPrefixes[i].toLowerCase();
if (window[prefix + '_indexedDB'] || window[prefix + 'IndexedDB']){
return true;
}
}
return false;
};
// 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() {
return isEventSupported('dragstart') && isEventSupported('drop');
};
tests['websockets'] = function(){
return ('WebSocket' in window);
};
// http://css-tricks.com/rgba-browser-support/
tests['rgba'] = function() {
// Set an rgba() color and check the returned value
set_css( 'background-color:rgba(150,255,150,.5)' );
return contains( m_style.backgroundColor, 'rgba' );
};
tests['hsla'] = function() {
// Same as rgba(), in fact, browsers re-map hsla() to rgba() internally,
// except IE9 who retains it as hsla
set_css('background-color:hsla(120,40%,100%,.5)' );
return contains( m_style.backgroundColor, 'rgba' ) || contains( m_style.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!
set_css( 'background:url(//:),url(//:),red url(//:)' );
// If the UA supports multiple backgrounds, there should be three occurrences
// of the string "url(" in the return value for elem_style.background
return new RegExp("(url\\s*\\(.*?){3}").test(m_style.background);
};
// 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.
tests['backgroundsize'] = function() {
return test_props_all( 'backgroundSize' );
};
tests['borderimage'] = function() {
return test_props_all( 'borderImage' );
};
// Super comprehensive table about all the unique implementations of
// border-radius: http://muddledramblings.com/table-of-css3-border-radius-compliance
tests['borderradius'] = function() {
return test_props_all( 'borderRadius', '', function( prop ) {
return contains( prop, 'orderRadius' );
});
};
// WebOS unfortunately false positives on this test.
tests['boxshadow'] = function() {
return test_props_all( '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.
set_css_all( 'opacity:.55' );
// The non-literal . in this regex is intentional:
// German Chrome returns this value as 0,55
// https://github.com/Modernizr/Modernizr/issues/#issue/59/comment/516632
return /^0.55$/.test(m_style.opacity);
};
tests['cssanimations'] = function() {
return test_props_all( 'animationName' );
};
tests['csscolumns'] = function() {
return test_props_all( 'columnCount' );
};
tests['cssgradients'] = function() {
/**
* For CSS Gradients syntax, please see:
* http://webkit.org/blog/175/introducing-css-gradients/
* https://developer.mozilla.org/en/CSS/-moz-linear-gradient
* https://developer.mozilla.org/en/CSS/-moz-radial-gradient
* http://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);';
set_css(
(str1 + prefixes.join(str2 + str1) + prefixes.join(str3 + str1)).slice(0,-str1.length)
);
return contains( m_style.backgroundImage, 'gradient' );
};
tests['cssreflections'] = function() {
return test_props_all( 'boxReflect' );
};
tests['csstransforms'] = function() {
return !!test_props([ 'transformProperty', 'WebkitTransform', 'MozTransform', 'OTransform', 'msTransform' ]);
};
tests['csstransforms3d'] = function() {
var ret = !!test_props([ 'perspectiveProperty', 'WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective' ]);
// 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),(-o-transform-3d),(-moz-transform-3d),(-ms-transform-3d),(-webkit-transform-3d),(modernizr){ ... }`
ret = testMediaQuery('@media ('+prefixes.join('transform-3d),(')+'modernizr)');
}
return ret;
};
tests['csstransitions'] = function() {
return test_props_all( 'transitionProperty' );
};
// @font-face detection routine by Diego Perini
// http://javascript.nwbox.com/CSSSupport/
tests['fontface'] = function(){
var
sheet, bool,
head = docHead || docElement,
style = document.createElement("style"),
impl = document.implementation || { hasFeature: function() { return false; } };
style.type = 'text/css';
head.insertBefore(style, head.firstChild);
sheet = style.sheet || style.styleSheet;
var supportAtRule = impl.hasFeature('CSS2', '') ?
function(rule) {
if (!(sheet && rule)) return false;
var result = false;
try {
sheet.insertRule(rule, 0);
result = (/src/i).test(sheet.cssRules[0].cssText);
sheet.deleteRule(sheet.cssRules.length - 1);
} catch(e) { }
return result;
} :
function(rule) {
if (!(sheet && rule)) return false;
sheet.cssText = rule;
return sheet.cssText.length !== 0 && (/src/i).test(sheet.cssText) &&
sheet.cssText
.replace(/\r+|\n+/g, '')
.indexOf(rule.split(' ')[0]) === 0;
};
bool = supportAtRule('@font-face { font-family: "font"; src: url(data:,); }');
head.removeChild(style);
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 : http://github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845
// thx to NielsLeenheer and zcorpan
// Note: in FF 3.5.1 and 3.5.0, "no" was a return value instead of empty string.
// Modernizr does not normalize for that.
tests['video'] = function() {
var elem = document.createElement('video'),
bool = !!elem.canPlayType;
if (bool){
bool = new Boolean(bool);
bool.ogg = elem.canPlayType('video/ogg; codecs="theora"');
// Workaround required for IE9, which doesn't report video support without audio codec specified.
// bug 599718 @ msft connect
var h264 = 'video/mp4; codecs="avc1.42E01E';
bool.h264 = elem.canPlayType(h264 + '"') || elem.canPlayType(h264 + ', mp4a.40.2"');
bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"');
}
return bool;
};
tests['audio'] = function() {
var elem = document.createElement('audio'),
bool = !!elem.canPlayType;
if (bool){
bool = new Boolean(bool);
bool.ogg = elem.canPlayType('audio/ogg; codecs="vorbis"');
bool.mp3 = elem.canPlayType('audio/mpeg;');
// Mimetypes accepted:
// https://developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
// http://bit.ly/iphoneoscodecs
bool.wav = elem.canPlayType('audio/wav; codecs="1"');
bool.m4a = elem.canPlayType('audio/x-m4a;') || elem.canPlayType('audio/aac;');
}
return bool;
};
// Firefox has made these tests rather unfun.
// 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 http://bugzil.la/365772 if cookies are disabled
// However, in Firefox 4 betas, if dom.storage.enabled == false, just mentioning
// the property will throw an exception. http://bugzil.la/599479
// This looks to be fixed for FF4 Final.
// Because we are forced to try/catch this, we'll go aggressive.
// FWIW: IE8 Compat mode supports these features completely:
// http://www.quirksmode.org/dom/html5.html
// But IE8 doesn't support either with local files
tests['localstorage'] = function() {
try {
return !!localStorage.getItem;
} catch(e) {
return false;
}
};
tests['sessionstorage'] = function() {
try {
return !!sessionStorage.getItem;
} 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;
};
tests['inlinesvg'] = function() {
var div = document.createElement('div');
div.innerHTML = '<svg/>';
return (div.firstChild && div.firstChild.namespaceURI) == ns.svg;
};
// Thanks to F1lt3r and lucideer
// http://github.com/Modernizr/Modernizr/issues#issue/35
tests['smil'] = function(){
return !!document.createElementNS && /SVG/.test(tostring.call(document.createElementNS(ns.svg,'animate')));
};
tests['svgclippaths'] = function(){
// Possibly returns a false positive in Safari 3.2?
return !!document.createElementNS && /SVG/.test(tostring.call(document.createElementNS(ns.svg,'clipPath')));
};
// 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(){
// Run through HTML5's new input attributes to see if the UA understands any.
// We're using f which is the <input> element created early on
// Mike Taylr has created a comprehensive resource for testing these attributes
// when applied to all input types:
// http://miketaylr.com/code/input-type-attr.html
// spec: http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
ret['input'] = (function(props) {
for (var i = 0, len = props.length; i<len; i++) {
attrs[ props[i] ] = !!(props[i] in inputElem);
}
return attrs;
})('autocomplete autofocus list placeholder max min multiple pattern required step'.split(' '));
// 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. http://miketaylr.com/
ret['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)$/.test(inputElemType)){
// Spec doesnt define any special parsing or detectable UI
// behaviors so we pass these through as true
// Interestingly, opera fails the earlier test, so it doesn't
// even make it here.
} else if (/^(url|email)$/.test(inputElemType)) {
// Real url and email support comes with prebaked validation.
bool = inputElem.checkValidity && inputElem.checkValidity() === false;
} else if (/^color$/.test(inputElemType)) {
// chuck into DOM and force reflow for Opera bug in 11.00
// github.com/Modernizr/Modernizr/issues#issue/159
docElement.appendChild(inputElem);
docElement.offsetWidth;
bool = inputElem.value != smile;
docElement.removeChild(inputElem);
} 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(' '));
}
// 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 ( hasOwnProperty( 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();
ret[ featurename ] = tests[ feature ]();
classes.push( ( ret[ featurename ] ? '' : 'no-' ) + featurename );
}
}
// input tests need to run.
if (!ret.input) webforms();
// Per 1.6: deprecated API is still accesible for now:
ret.crosswindowmessaging = ret.postmessage;
ret.historymanagement = ret.history;
/**
* 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
*/
ret.addTest = function (feature, test) {
feature = feature.toLowerCase();
if (ret[ feature ]) {
return; // quit if you're trying to overwrite an existing test
}
test = !!(test());
docElement.className += ' ' + (test ? '' : 'no-') + feature;
ret[ feature ] = test;
return ret; // allow chaining.
};
/**
* Reset m.style.cssText to nothing to reduce memory footprint.
*/
set_css( '' );
modElem = inputElem = null;
//>>BEGIN IEPP
// Enable HTML 5 elements for styling in IE.
// fyi: jscript version does not reflect trident version
// therefore ie9 in ie7 mode will still have a jScript v.9
if ( enableHTML5 && window.attachEvent && (function(){ var elem = document.createElement("div");
elem.innerHTML = "<elem></elem>";
return elem.childNodes.length !== 1; })()) {
// iepp v1.6.2 by @jon_neal : code.google.com/p/ie-print-protector
(function(win, doc) {
var elems = 'abbr|article|aside|audio|canvas|details|figcaption|figure|footer|header|hgroup|mark|meter|nav|output|progress|section|summary|time|video',
elemsArr = elems.split('|'),
elemsArrLen = elemsArr.length,
elemRegExp = new RegExp('(^|\\s)('+elems+')', 'gi'),
tagRegExp = new RegExp('<(\/*)('+elems+')', 'gi'),
ruleRegExp = new RegExp('(^|[^\\n]*?\\s)('+elems+')([^\\n]*)({[\\n\\w\\W]*?})', 'gi'),
docFrag = doc.createDocumentFragment(),
html = doc.documentElement,
head = html.firstChild,
bodyElem = doc.createElement('body'),
styleElem = doc.createElement('style'),
body;
function shim(doc) {
var a = -1;
while (++a < elemsArrLen)
// Use createElement so IE allows HTML5-named elements in a document
doc.createElement(elemsArr[a]);
}
function getCSS(styleSheetList, mediaType) {
var a = -1,
len = styleSheetList.length,
styleSheet,
cssTextArr = [];
while (++a < len) {
styleSheet = styleSheetList[a];
// Get css from all non-screen stylesheets and their imports
if ((mediaType = styleSheet.media || mediaType) != 'screen') cssTextArr.push(getCSS(styleSheet.imports, mediaType), styleSheet.cssText);
}
return cssTextArr.join('');
}
// Shim the document and iepp fragment
shim(doc);
shim(docFrag);
// Add iepp custom print style element
head.insertBefore(styleElem, head.firstChild);
styleElem.media = 'print';
win.attachEvent(
'onbeforeprint',
function() {
var a = -1,
cssText = getCSS(doc.styleSheets, 'all'),
cssTextArr = [],
rule;
body = body || doc.body;
// Get only rules which reference HTML5 elements by name
while ((rule = ruleRegExp.exec(cssText)) != null)
// Replace all html5 element references with iepp substitute classnames
cssTextArr.push((rule[1]+rule[2]+rule[3]).replace(elemRegExp, '$1.iepp_$2')+rule[4]);
// Write iepp custom print CSS
styleElem.styleSheet.cssText = cssTextArr.join('\n');
while (++a < elemsArrLen) {
var nodeList = doc.getElementsByTagName(elemsArr[a]),
nodeListLen = nodeList.length,
b = -1;
while (++b < nodeListLen)
if (nodeList[b].className.indexOf('iepp_') < 0)
// Append iepp substitute classnames to all html5 elements
nodeList[b].className += ' iepp_'+elemsArr[a];
}
docFrag.appendChild(body);
html.appendChild(bodyElem);
// Write iepp substitute print-safe document
bodyElem.className = body.className;
// Replace HTML5 elements with <font> which is print-safe and shouldn't conflict since it isn't part of html5
bodyElem.innerHTML = body.innerHTML.replace(tagRegExp, '<$1font');
}
);
win.attachEvent(
'onafterprint',
function() {
// Undo everything done in onbeforeprint
bodyElem.innerHTML = '';
html.removeChild(bodyElem);
html.appendChild(body);
styleElem.styleSheet.cssText = '';
}
);
})(window, document);
}
//>>END IEPP
// Assign private properties to the return object with prefix
ret._enableHTML5 = enableHTML5;
ret._version = version;
// Remove "no-js" class from <html> element, if it exists:
docElement.className = docElement.className.replace(/\bno-js\b/,'')
+ ' js '
// Add the new classes to the <html> element.
+ classes.join( ' ' );
return ret;
})(this,this.document);
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