https://topeat.tw/_mod/frontend/theme/js/modernizr.custom.js

1/*!
2 * Modernizr v2.8.3
3 * www.modernizr.com
4 *
5 * Copyright (c) Faruk Ates, Paul Irish, Alex Sexton
6 * Available under the BSD and MIT licenses: www.modernizr.com/license/
7 */
8
9/*
10 * Modernizr tests which native CSS3 and HTML5 features are available in
11 * the current UA and makes the results available to you in two ways:
12 * as properties on a global Modernizr object, and as classes on the
13 * <html> element. This information allows you to progressively enhance
14 * your pages with a granular level of control over the experience.
15 *
16 * Modernizr has an optional (not included) conditional resource loader
17 * called Modernizr.load(), based on Yepnope.js (yepnopejs.com).
18 * To get a build that includes Modernizr.load(), as well as choosing
19 * which tests to include, go to www.modernizr.com/download/
20 *
21 * Authors        Faruk Ates, Paul Irish, Alex Sexton
22 * Contributors   Ryan Seddon, Ben Alman
23 */
24
25window.Modernizr = (function (window, document, undefined) {
26
27    var version = '2.8.3',
28
29        Modernizr = {},
30
31        /*>>cssclasses*/
32        // option for enabling the HTML classes to be added
33        enableClasses = true,
34        /*>>cssclasses*/
35
36        docElement = document.documentElement,
37
38        /**
39         * Create our "modernizr" element that we do most feature tests on.
40         */
41        mod = 'modernizr',
42        modElem = document.createElement(mod),
43        mStyle = modElem.style,
44
45        /**
46         * Create the input element for various Web Forms feature tests.
47         */
48        inputElem /*>>inputelem*/ = document.createElement('input') /*>>inputelem*/,
49
50        /*>>smile*/
51        smile = ':)',
52        /*>>smile*/
53
54        toString = {}.toString,
55
56        // TODO :: make the prefixes more granular
57        /*>>prefixes*/
58        // List of property values to set for css tests. See ticket #21
59        prefixes = ' -webkit- -moz- -o- -ms- '.split(' '),
60        /*>>prefixes*/
61
62        /*>>domprefixes*/
63        // Following spec is to expose vendor-specific style properties as:
64        //   elem.style.WebkitBorderRadius
65        // and the following would be incorrect:
66        //   elem.style.webkitBorderRadius
67
68        // Webkit ghosts their properties in lowercase but Opera & Moz do not.
69        // Microsoft uses a lowercase `ms` instead of the correct `Ms` in IE8+
70        //   erik.eae.net/archives/2008/03/10/21.48.10/
71
72        // More here: github.com/Modernizr/Modernizr/issues/issue/21
73        omPrefixes = 'Webkit Moz O ms',
74
75        cssomPrefixes = omPrefixes.split(' '),
76
77        domPrefixes = omPrefixes.toLowerCase().split(' '),
78        /*>>domprefixes*/
79
80        /*>>ns*/
81        ns = {'svg': 'http://www.w3.org/2000/svg'},
82        /*>>ns*/
83
84        tests = {},
85        inputs = {},
86        attrs = {},
87
88        classes = [],
89
90        slice = classes.slice,
91
92        featureName, // used in testing loop
93
94
95        /*>>teststyles*/
96        // Inject element with style element and some CSS rules
97        injectElementWithStyles = function (rule, callback, nodes, testnames) {
98
99            var style, ret, node, docOverflow,
100                div = document.createElement('div'),
101                // After page load injecting a fake body doesn't work so check if body exists
102                body = document.body,
103                // IE6 and 7 won't return offsetWidth or offsetHeight unless it's in the body element, so we fake it.
104                fakeBody = body || document.createElement('body');
105
106            if (parseInt(nodes, 10)) {
107                // In order not to give false positives we create a node for each test
108                // This also allows the method to scale for unspecified uses
109                while (nodes--) {
110                    node = document.createElement('div');
111                    node.id = testnames ? testnames[nodes] : mod + (nodes + 1);
112                    div.appendChild(node);
113                }
114            }
115
116            // <style> elements in IE6-9 are considered 'NoScope' elements and therefore will be removed
117            // when injected with innerHTML. To get around this you need to prepend the 'NoScope' element
118            // with a 'scoped' element, in our case the soft-hyphen entity as it won't mess with our measurements.
119            // msdn.microsoft.com/en-us/library/ms533897%28VS.85%29.aspx
120            // Documents served as xml will throw if using &shy; so use xml friendly encoded version. See issue #277
121            style = ['&#173;', '<style id="s', mod, '">', rule, '</style>'].join('');
122            div.id = mod;
123            // 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.
124            // Opera will act all quirky when injecting elements in documentElement when page is served as xml, needs fakebody too. #270
125            (body ? div : fakeBody).innerHTML += style;
126            fakeBody.appendChild(div);
127            if (!body) {
128                //avoid crashing IE8, if background image is used
129                fakeBody.style.background = '';
130                //Safari 5.13/5.1.4 OSX stops loading if ::-webkit-scrollbar is used and scrollbars are visible
131                fakeBody.style.overflow = 'hidden';
132                docOverflow = docElement.style.overflow;
133                docElement.style.overflow = 'hidden';
134                docElement.appendChild(fakeBody);
135            }
136
137            ret = callback(div, rule);
138            // If this is done after page load we don't want to remove the body so check if body exists
139            if (!body) {
140                fakeBody.parentNode.removeChild(fakeBody);
141                docElement.style.overflow = docOverflow;
142            } else {
143                div.parentNode.removeChild(div);
144            }
145
146            return !!ret;
147
148        },
149        /*>>teststyles*/
150
151        /*>>mq*/
152        // adapted from matchMedia polyfill
153        // by Scott Jehl and Paul Irish
154        // gist.github.com/786768
155        testMediaQuery = function (mq) {
156
157            var matchMedia = window.matchMedia || window.msMatchMedia;
158            if (matchMedia) {
159                return matchMedia(mq) && matchMedia(mq).matches || false;
160            }
161
162            var bool;
163
164            injectElementWithStyles('@media ' + mq + ' { #' + mod + ' { position: absolute; } }', function (node) {
165                bool = (window.getComputedStyle ?
166                    getComputedStyle(node, null) :
167                    node.currentStyle)['position'] == 'absolute';
168            });
169
170            return bool;
171
172        },
173        /*>>mq*/
174
175
176        /*>>hasevent*/
177        //
178        // isEventSupported determines if a given element supports the given event
179        // kangax.github.com/iseventsupported/
180        //
181        // The following results are known incorrects:
182        //   Modernizr.hasEvent("webkitTransitionEnd", elem) // false negative
183        //   Modernizr.hasEvent("textInput") // in Webkit. github.com/Modernizr/Modernizr/issues/333
184        //   ...
185        isEventSupported = (function () {
186
187            var TAGNAMES = {
188                'select': 'input', 'change': 'input',
189                'submit': 'form', 'reset': 'form',
190                'error': 'img', 'load': 'img', 'abort': 'img'
191            };
192
193            function isEventSupported(eventName, element) {
194
195                element = element || document.createElement(TAGNAMES[eventName] || 'div');
196                eventName = 'on' + eventName;
197
198                // When using `setAttribute`, IE skips "unload", WebKit skips "unload" and "resize", whereas `in` "catches" those
199                var isSupported = eventName in element;
200
201                if (!isSupported) {
202                    // If it has no `setAttribute` (i.e. doesn't implement Node interface), try generic element
203                    if (!element.setAttribute) {
204                        element = document.createElement('div');
205                    }
206                    if (element.setAttribute && element.removeAttribute) {
207                        element.setAttribute(eventName, '');
208                        isSupported = is(element[eventName], 'function');
209
210                        // If property was created, "remove it" (by setting value to `undefined`)
211                        if (!is(element[eventName], 'undefined')) {
212                            element[eventName] = undefined;
213                        }
214                        element.removeAttribute(eventName);
215                    }
216                }
217
218                element = null;
219                return isSupported;
220            }
221
222            return isEventSupported;
223        })(),
224        /*>>hasevent*/
225
226        // TODO :: Add flag for hasownprop ? didn't last time
227
228        // hasOwnProperty shim by kangax needed for Safari 2.0 support
229        _hasOwnProperty = ({}).hasOwnProperty, hasOwnProp;
230
231    if (!is(_hasOwnProperty, 'undefined') && !is(_hasOwnProperty.call, 'undefined')) {
232        hasOwnProp = function (object, property) {
233            return _hasOwnProperty.call(object, property);
234        };
235    } else {
236        hasOwnProp = function (object, property) { /* yes, this can give false positives/negatives, but most of the time we don't care about those */
237            return ((property in object) && is(object.constructor.prototype[property], 'undefined'));
238        };
239    }
240
241    // Adapted from ES5-shim https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js
242    // es5.github.com/#x15.3.4.5
243
244    if (!Function.prototype.bind) {
245        Function.prototype.bind = function bind(that) {
246
247            var target = this;
248
249            if (typeof target != "function") {
250                throw new TypeError();
251            }
252
253            var args = slice.call(arguments, 1),
254                bound = function () {
255
256                    if (this instanceof bound) {
257
258                        var F = function () {
259                        };
260                        F.prototype = target.prototype;
261                        var self = new F();
262
263                        var result = target.apply(
264                            self,
265                            args.concat(slice.call(arguments))
266                        );
267                        if (Object(result) === result) {
268                            return result;
269                        }
270                        return self;
271
272                    } else {
273
274                        return target.apply(
275                            that,
276                            args.concat(slice.call(arguments))
277                        );
278
279                    }
280
281                };
282
283            return bound;
284        };
285    }
286
287    /**
288     * setCss applies given styles to the Modernizr DOM node.
289     */
290    function setCss(str) {
291        mStyle.cssText = str;
292    }
293
294    /**
295     * setCssAll extrapolates all vendor-specific css strings.
296     */
297    function setCssAll(str1, str2) {
298        return setCss(prefixes.join(str1 + ';') + (str2 || ''));
299    }
300
301    /**
302     * is returns a boolean for if typeof obj is exactly type.
303     */
304    function is(obj, type) {
305        return typeof obj === type;
306    }
307
308    /**
309     * contains returns a boolean for if substr is found within str.
310     */
311    function contains(str, substr) {
312        return !!~('' + str).indexOf(substr);
313    }
314
315    /*>>testprop*/
316
317    // testProps is a generic CSS / DOM property test.
318
319    // In testing support for a given CSS property, it's legit to test:
320    //    `elem.style[styleName] !== undefined`
321    // If the property is supported it will return an empty string,
322    // if unsupported it will return undefined.
323
324    // We'll take advantage of this quick test and skip setting a style
325    // on our modernizr element, but instead just testing undefined vs
326    // empty string.
327
328    // Because the testing of the CSS property names (with "-", as
329    // opposed to the camelCase DOM properties) is non-portable and
330    // non-standard but works in WebKit and IE (but not Gecko or Opera),
331    // we explicitly reject properties with dashes so that authors
332    // developing in WebKit or IE first don't end up with
333    // browser-specific content by accident.
334
335    function testProps(props, prefixed) {
336        for (var i in props) {
337            var prop = props[i];
338            if (!contains(prop, "-") && mStyle[prop] !== undefined) {
339                return prefixed == 'pfx' ? prop : true;
340            }
341        }
342        return false;
343    }
344
345    /*>>testprop*/
346
347    // TODO :: add testDOMProps
348    /**
349     * testDOMProps is a generic DOM property test; if a browser supports
350     *   a certain property, it won't return undefined for it.
351     */
352    function testDOMProps(props, obj, elem) {
353        for (var i in props) {
354            var item = obj[props[i]];
355            if (item !== undefined) {
356
357                // return the property name as a string
358                if (elem === false) return props[i];
359
360                // let's bind a function
361                if (is(item, 'function')) {
362                    // default to autobind unless override
363                    return item.bind(elem || obj);
364                }
365
366                // return the unbound function or obj or value
367                return item;
368            }
369        }
370        return false;
371    }
372
373    /*>>testallprops*/
374    /**
375     * testPropsAll tests a list of DOM properties we want to check against.
376     *   We specify literally ALL possible (known and/or likely) properties on
377     *   the element including the non-vendor prefixed one, for forward-
378     *   compatibility.
379     */
380    function testPropsAll(prop, prefixed, elem) {
381
382        var ucProp = prop.charAt(0).toUpperCase() + prop.slice(1),
383            props = (prop + ' ' + cssomPrefixes.join(ucProp + ' ') + ucProp).split(' ');
384
385        // did they call .prefixed('boxSizing') or are we just testing a prop?
386        if (is(prefixed, "string") || is(prefixed, "undefined")) {
387            return testProps(props, prefixed);
388
389            // otherwise, they called .prefixed('requestAnimationFrame', window[, elem])
390        } else {
391            props = (prop + ' ' + (domPrefixes).join(ucProp + ' ') + ucProp).split(' ');
392            return testDOMProps(props, prefixed, elem);
393        }
394    }
395
396    /*>>testallprops*/
397
398
399    /**
400     * Tests
401     * -----
402     */
403
404    // The *new* flexbox
405    // dev.w3.org/csswg/css3-flexbox
406
407    tests['flexbox'] = function () {
408        return testPropsAll('flexWrap');
409    };
410
411    // The *old* flexbox
412    // www.w3.org/TR/2009/WD-css3-flexbox-20090723/
413
414    tests['flexboxlegacy'] = function () {
415        return testPropsAll('boxDirection');
416    };
417
418    // On the S60 and BB Storm, getContext exists, but always returns undefined
419    // so we actually have to call getContext() to verify
420    // github.com/Modernizr/Modernizr/issues/issue/97/
421
422    tests['canvas'] = function () {
423        var elem = document.createElement('canvas');
424        return !!(elem.getContext && elem.getContext('2d'));
425    };
426
427    tests['canvastext'] = function () {
428        return !!(Modernizr['canvas'] && is(document.createElement('canvas').getContext('2d').fillText, 'function'));
429    };
430
431    // webk.it/70117 is tracking a legit WebGL feature detect proposal
432
433    // We do a soft detect which may false positive in order to avoid
434    // an expensive context creation: bugzil.la/732441
435
436    tests['webgl'] = function () {
437        return !!window.WebGLRenderingContext;
438    };
439
440    /*
441     * The Modernizr.touch test only indicates if the browser supports
442     *    touch events, which does not necessarily reflect a touchscreen
443     *    device, as evidenced by tablets running Windows 7 or, alas,
444     *    the Palm Pre / WebOS (touch) phones.
445     *
446     * Additionally, Chrome (desktop) used to lie about its support on this,
447     *    but that has since been rectified: crbug.com/36415
448     *
449     * We also test for Firefox 4 Multitouch Support.
450     *
451     * For more info, see: modernizr.github.com/Modernizr/touch.html
452     */
453
454    tests['touch'] = function () {
455        var bool;
456
457        if (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch) {
458            bool = true;
459        } else {
460            injectElementWithStyles(['@media (', prefixes.join('touch-enabled),('), mod, ')', '{#modernizr{top:9px;position:absolute}}'].join(''), function (node) {
461                bool = node.offsetTop === 9;
462            });
463        }
464
465        return bool;
466    };
467
468
469    // geolocation is often considered a trivial feature detect...
470    // Turns out, it's quite tricky to get right:
471    //
472    // Using !!navigator.geolocation does two things we don't want. It:
473    //   1. Leaks memory in IE9: github.com/Modernizr/Modernizr/issues/513
474    //   2. Disables page caching in WebKit: webk.it/43956
475    //
476    // Meanwhile, in Firefox < 8, an about:config setting could expose
477    // a false positive that would throw an exception: bugzil.la/688158
478
479    tests['geolocation'] = function () {
480        return 'geolocation' in navigator;
481    };
482
483
484    tests['postmessage'] = function () {
485        return !!window.postMessage;
486    };
487
488
489    // Chrome incognito mode used to throw an exception when using openDatabase
490    // It doesn't anymore.
491    tests['websqldatabase'] = function () {
492        return !!window.openDatabase;
493    };
494
495    // Vendors had inconsistent prefixing with the experimental Indexed DB:
496    // - Webkit's implementation is accessible through webkitIndexedDB
497    // - Firefox shipped moz_indexedDB before FF4b9, but since then has been mozIndexedDB
498    // For speed, we don't test the legacy (and beta-only) indexedDB
499    tests['indexedDB'] = function () {
500        return !!testPropsAll("indexedDB", window);
501    };
502
503    // documentMode logic from YUI to filter out IE8 Compat Mode
504    //   which false positives.
505    tests['hashchange'] = function () {
506        return isEventSupported('hashchange', window) && (document.documentMode === undefined || document.documentMode > 7);
507    };
508
509    // Per 1.6:
510    // This used to be Modernizr.historymanagement but the longer
511    // name has been deprecated in favor of a shorter and property-matching one.
512    // The old API is still available in 1.6, but as of 2.0 will throw a warning,
513    // and in the first release thereafter disappear entirely.
514    tests['history'] = function () {
515        return !!(window.history && history.pushState);
516    };
517
518    tests['draganddrop'] = function () {
519        var div = document.createElement('div');
520        return ('draggable' in div) || ('ondragstart' in div && 'ondrop' in div);
521    };
522
523    // FF3.6 was EOL'ed on 4/24/12, but the ESR version of FF10
524    // will be supported until FF19 (2/12/13), at which time, ESR becomes FF17.
525    // FF10 still uses prefixes, so check for it until then.
526    // for more ESR info, see: mozilla.org/en-US/firefox/organizations/faq/
527    tests['websockets'] = function () {
528        return 'WebSocket' in window || 'MozWebSocket' in window;
529    };
530
531
532    // css-tricks.com/rgba-browser-support/
533    tests['rgba'] = function () {
534        // Set an rgba() color and check the returned value
535
536        setCss('background-color:rgba(150,255,150,.5)');
537
538        return contains(mStyle.backgroundColor, 'rgba');
539    };
540
541    tests['hsla'] = function () {
542        // Same as rgba(), in fact, browsers re-map hsla() to rgba() internally,
543        //   except IE9 who retains it as hsla
544
545        setCss('background-color:hsla(120,40%,100%,.5)');
546
547        return contains(mStyle.backgroundColor, 'rgba') || contains(mStyle.backgroundColor, 'hsla');
548    };
549
550    tests['multiplebgs'] = function () {
551        // Setting multiple images AND a color on the background shorthand property
552        //  and then querying the style.background property value for the number of
553        //  occurrences of "url(" is a reliable method for detecting ACTUAL support for this!
554
555        setCss('background:url(https://),url(https://),red url(https://)');
556
557        // If the UA supports multiple backgrounds, there should be three occurrences
558        //   of the string "url(" in the return value for elemStyle.background
559
560        return (/(url\s*\(.*?){3}/).test(mStyle.background);
561    };
562
563
564    // this will false positive in Opera Mini
565    //   github.com/Modernizr/Modernizr/issues/396
566
567    tests['backgroundsize'] = function () {
568        return testPropsAll('backgroundSize');
569    };
570
571    tests['borderimage'] = function () {
572        return testPropsAll('borderImage');
573    };
574
575
576    // Super comprehensive table about all the unique implementations of
577    // border-radius: muddledramblings.com/table-of-css3-border-radius-compliance
578
579    tests['borderradius'] = function () {
580        return testPropsAll('borderRadius');
581    };
582
583    // WebOS unfortunately false positives on this test.
584    tests['boxshadow'] = function () {
585        return testPropsAll('boxShadow');
586    };
587
588    // FF3.0 will false positive on this test
589    tests['textshadow'] = function () {
590        return document.createElement('div').style.textShadow === '';
591    };
592
593
594    tests['opacity'] = function () {
595        // Browsers that actually have CSS Opacity implemented have done so
596        //  according to spec, which means their return values are within the
597        //  range of [0.0,1.0] - including the leading zero.
598
599        setCssAll('opacity:.55');
600
601        // The non-literal . in this regex is intentional:
602        //   German Chrome returns this value as 0,55
603        // github.com/Modernizr/Modernizr/issues/#issue/59/comment/516632
604        return (/^0.55$/).test(mStyle.opacity);
605    };
606
607
608    // Note, Android < 4 will pass this test, but can only animate
609    //   a single property at a time
610    //   goo.gl/v3V4Gp
611    tests['cssanimations'] = function () {
612        return testPropsAll('animationName');
613    };
614
615
616    tests['csscolumns'] = function () {
617        return testPropsAll('columnCount');
618    };
619
620
621    tests['cssgradients'] = function () {
622        /**
623         * For CSS Gradients syntax, please see:
624         * webkit.org/blog/175/introducing-css-gradients/
625         * developer.mozilla.org/en/CSS/-moz-linear-gradient
626         * developer.mozilla.org/en/CSS/-moz-radial-gradient
627         * dev.w3.org/csswg/css3-images/#gradients-
628         */
629
630        var str1 = 'background-image:',
631            str2 = 'gradient(linear,left top,right bottom,from(#9f9),to(white));',
632            str3 = 'linear-gradient(left top,#9f9, white);';
633
634        setCss(
635            // legacy webkit syntax (FIXME: remove when syntax not in use anymore)
636            (str1 + '-webkit- '.split(' ').join(str2 + str1) +
637                // standard syntax             // trailing 'background-image:'
638                prefixes.join(str3 + str1)).slice(0, -str1.length)
639        );
640
641        return contains(mStyle.backgroundImage, 'gradient');
642    };
643
644
645    tests['cssreflections'] = function () {
646        return testPropsAll('boxReflect');
647    };
648
649
650    tests['csstransforms'] = function () {
651        return !!testPropsAll('transform');
652    };
653
654
655    tests['csstransforms3d'] = function () {
656
657        var ret = !!testPropsAll('perspective');
658
659        // Webkit's 3D transforms are passed off to the browser's own graphics renderer.
660        //   It works fine in Safari on Leopard and Snow Leopard, but not in Chrome in
661        //   some conditions. As a result, Webkit typically recognizes the syntax but
662        //   will sometimes throw a false positive, thus we must do a more thorough check:
663        if (ret && 'webkitPerspective' in docElement.style) {
664
665            // Webkit allows this media query to succeed only if the feature is enabled.
666            // `@media (transform-3d),(-webkit-transform-3d){ ... }`
667            injectElementWithStyles('@media (transform-3d),(-webkit-transform-3d){#modernizr{left:9px;position:absolute;height:3px;}}', function (node, rule) {
668                ret = node.offsetLeft === 9 && node.offsetHeight === 3;
669            });
670        }
671        return ret;
672    };
673
674
675    tests['csstransitions'] = function () {
676        return testPropsAll('transition');
677    };
678
679
680    /*>>fontface*/
681    // @font-face detection routine by Diego Perini
682    // javascript.nwbox.com/CSSSupport/
683
684    // false positives:
685    //   WebOS github.com/Modernizr/Modernizr/issues/342
686    //   WP7   github.com/Modernizr/Modernizr/issues/538
687    tests['fontface'] = function () {
688        var bool;
689
690        injectElementWithStyles('@font-face {font-family:"font";src:url("https://")}', function (node, rule) {
691            var style = document.getElementById('smodernizr'),
692                sheet = style.sheet || style.styleSheet,
693                cssText = sheet ? (sheet.cssRules && sheet.cssRules[0] ? sheet.cssRules[0].cssText : sheet.cssText || '') : '';
694
695            bool = /src/i.test(cssText) && cssText.indexOf(rule.split(' ')[0]) === 0;
696        });
697
698        return bool;
699    };
700    /*>>fontface*/
701
702    // CSS generated content detection
703    tests['generatedcontent'] = function () {
704        var bool;
705
706        injectElementWithStyles(['#', mod, '{font:0/0 a}#', mod, ':after{content:"', smile, '";visibility:hidden;font:3px/1 a}'].join(''), function (node) {
707            bool = node.offsetHeight >= 3;
708        });
709
710        return bool;
711    };
712
713
714    // These tests evaluate support of the video/audio elements, as well as
715    // testing what types of content they support.
716    //
717    // We're using the Boolean constructor here, so that we can extend the value
718    // e.g.  Modernizr.video     // true
719    //       Modernizr.video.ogg // 'probably'
720    //
721    // Codec values from : github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845
722    //                     thx to NielsLeenheer and zcorpan
723
724    // Note: in some older browsers, "no" was a return value instead of empty string.
725    //   It was live in FF3.5.0 and 3.5.1, but fixed in 3.5.2
726    //   It was also live in Safari 4.0.0 - 4.0.4, but fixed in 4.0.5
727
728    tests['video'] = function () {
729        var elem = document.createElement('video'),
730            bool = false;
731
732        // IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
733        try {
734            if (bool = !!elem.canPlayType) {
735                bool = Boolean(bool);
736                bool.ogg = elem.canPlayType('video/ogg; codecs="theora"').replace(/^no$/, '');
737
738                // Without QuickTime, this value will be `undefined`. github.com/Modernizr/Modernizr/issues/546
739                bool.h264 = elem.canPlayType('video/mp4; codecs="avc1.42E01E"').replace(/^no$/, '');
740
741                bool.webm = elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/, '');
742            }
743
744        } catch (e) {
745        }
746
747        return bool;
748    };
749
750    tests['audio'] = function () {
751        var elem = document.createElement('audio'),
752            bool = false;
753
754        try {
755            if (bool = !!elem.canPlayType) {
756                bool = Boolean(bool);
757                bool.ogg = elem.canPlayType('audio/ogg; codecs="vorbis"').replace(/^no$/, '');
758                bool.mp3 = elem.canPlayType('audio/mpeg;').replace(/^no$/, '');
759
760                // Mimetypes accepted:
761                //   developer.mozilla.org/En/Media_formats_supported_by_the_audio_and_video_elements
762                //   bit.ly/iphoneoscodecs
763                bool.wav = elem.canPlayType('audio/wav; codecs="1"').replace(/^no$/, '');
764                bool.m4a = (elem.canPlayType('audio/x-m4a;') ||
765                    elem.canPlayType('audio/aac;')).replace(/^no$/, '');
766            }
767        } catch (e) {
768        }
769
770        return bool;
771    };
772
773
774    // In FF4, if disabled, window.localStorage should === null.
775
776    // Normally, we could not test that directly and need to do a
777    //   `('localStorage' in window) && ` test first because otherwise Firefox will
778    //   throw bugzil.la/365772 if cookies are disabled
779
780    // Also in iOS5 Private Browsing mode, attempting to use localStorage.setItem
781    // will throw the exception:
782    //   QUOTA_EXCEEDED_ERRROR DOM Exception 22.
783    // Peculiarly, getItem and removeItem calls do not throw.
784
785    // Because we are forced to try/catch this, we'll go aggressive.
786
787    // Just FWIW: IE8 Compat mode supports these features completely:
788    //   www.quirksmode.org/dom/html5.html
789    // But IE8 doesn't support either with local files
790
791    tests['localstorage'] = function () {
792        try {
793            localStorage.setItem(mod, mod);
794            localStorage.removeItem(mod);
795            return true;
796        } catch (e) {
797            return false;
798        }
799    };
800
801    tests['sessionstorage'] = function () {
802        try {
803            sessionStorage.setItem(mod, mod);
804            sessionStorage.removeItem(mod);
805            return true;
806        } catch (e) {
807            return false;
808        }
809    };
810
811
812    tests['webworkers'] = function () {
813        return !!window.Worker;
814    };
815
816
817    tests['applicationcache'] = function () {
818        return !!window.applicationCache;
819    };
820
821
822    // Thanks to Erik Dahlstrom
823    tests['svg'] = function () {
824        return !!document.createElementNS && !!document.createElementNS(ns.svg, 'svg').createSVGRect;
825    };
826
827    // specifically for SVG inline in HTML, not within XHTML
828    // test page: paulirish.com/demo/inline-svg
829    tests['inlinesvg'] = function () {
830        var div = document.createElement('div');
831        div.innerHTML = '<svg/>';
832        return (div.firstChild && div.firstChild.namespaceURI) == ns.svg;
833    };
834
835    // SVG SMIL animation
836    tests['smil'] = function () {
837        return !!document.createElementNS && /SVGAnimate/.test(toString.call(document.createElementNS(ns.svg, 'animate')));
838    };
839
840    // This test is only for clip paths in SVG proper, not clip paths on HTML content
841    // demo: srufaculty.sru.edu/david.dailey/svg/newstuff/clipPath4.svg
842
843    // However read the comments to dig into applying SVG clippaths to HTML content here:
844    //   github.com/Modernizr/Modernizr/issues/213#issuecomment-1149491
845    tests['svgclippaths'] = function () {
846        return !!document.createElementNS && /SVGClipPath/.test(toString.call(document.createElementNS(ns.svg, 'clipPath')));
847    };
848
849    /*>>webforms*/
850    // input features and input types go directly onto the ret object, bypassing the tests loop.
851    // Hold this guy to execute in a moment.
852    function webforms() {
853        /*>>input*/
854        // Run through HTML5's new input attributes to see if the UA understands any.
855        // We're using f which is the <input> element created early on
856        // Mike Taylr has created a comprehensive resource for testing these attributes
857        //   when applied to all input types:
858        //   miketaylr.com/code/input-type-attr.html
859        // spec: www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
860
861        // Only input placeholder is tested while textarea's placeholder is not.
862        // Currently Safari 4 and Opera 11 have support only for the input placeholder
863        // Both tests are available in feature-detects/forms-placeholder.js
864        Modernizr['input'] = (function (props) {
865            for (var i = 0, len = props.length; i < len; i++) {
866                attrs[props[i]] = !!(props[i] in inputElem);
867            }
868            if (attrs.list) {
869                // safari false positive's on datalist: webk.it/74252
870                // see also github.com/Modernizr/Modernizr/issues/146
871                attrs.list = !!(document.createElement('datalist') && window.HTMLDataListElement);
872            }
873            return attrs;
874        })('autocomplete autofocus list placeholder max min multiple pattern required step'.split(' '));
875        /*>>input*/
876
877        /*>>inputtypes*/
878        // Run through HTML5's new input types to see if the UA understands any.
879        //   This is put behind the tests runloop because it doesn't return a
880        //   true/false like all the other tests; instead, it returns an object
881        //   containing each input type with its corresponding true/false value
882
883        // Big thanks to @miketaylr for the html5 forms expertise. miketaylr.com/
884        Modernizr['inputtypes'] = (function (props) {
885
886            for (var i = 0, bool, inputElemType, defaultView, len = props.length; i < len; i++) {
887
888                inputElem.setAttribute('type', inputElemType = props[i]);
889                bool = inputElem.type !== 'text';
890
891                // We first check to see if the type we give it sticks..
892                // If the type does, we feed it a textual value, which shouldn't be valid.
893                // If the value doesn't stick, we know there's input sanitization which infers a custom UI
894                if (bool) {
895
896                    inputElem.value = smile;
897                    inputElem.style.cssText = 'position:absolute;visibility:hidden;';
898
899                    if (/^range$/.test(inputElemType) && inputElem.style.WebkitAppearance !== undefined) {
900
901                        docElement.appendChild(inputElem);
902                        defaultView = document.defaultView;
903
904                        // Safari 2-4 allows the smiley as a value, despite making a slider
905                        bool = defaultView.getComputedStyle &&
906                            defaultView.getComputedStyle(inputElem, null).WebkitAppearance !== 'textfield' &&
907                            // Mobile android web browser has false positive, so must
908                            // check the height to see if the widget is actually there.
909                            (inputElem.offsetHeight !== 0);
910
911                        docElement.removeChild(inputElem);
912
913                    } else if (/^(search|tel)$/.test(inputElemType)) {
914                        // Spec doesn't define any special parsing or detectable UI
915                        //   behaviors so we pass these through as true
916
917                        // Interestingly, opera fails the earlier test, so it doesn't
918                        //  even make it here.
919
920                    } else if (/^(url|email)$/.test(inputElemType)) {
921                        // Real url and email support comes with prebaked validation.
922                        bool = inputElem.checkValidity && inputElem.checkValidity() === false;
923
924                    } else {
925                        // If the upgraded input compontent rejects the :) text, we got a winner
926                        bool = inputElem.value != smile;
927                    }
928                }
929
930                inputs[props[i]] = !!bool;
931            }
932            return inputs;
933        })('search tel url email datetime date month week time datetime-local number range color'.split(' '));
934        /*>>inputtypes*/
935    }
936
937    /*>>webforms*/
938
939
940    // End of test definitions
941    // -----------------------
942
943
944    // Run through all tests and detect their support in the current UA.
945    // todo: hypothetically we could be doing an array of tests and use a basic loop here.
946    for (var feature in tests) {
947        if (hasOwnProp(tests, feature)) {
948            // run the test, throw the return value into the Modernizr,
949            //   then based on that boolean, define an appropriate className
950            //   and push it into an array of classes we'll join later.
951            featureName = feature.toLowerCase();
952            Modernizr[featureName] = tests[feature]();
953
954            classes.push((Modernizr[featureName] ? '' : 'no-') + featureName);
955        }
956    }
957
958    /*>>webforms*/
959    // input tests need to run.
960    Modernizr.input || webforms();
961    /*>>webforms*/
962
963
964    /**
965     * addTest allows the user to define their own feature tests
966     * the result will be added onto the Modernizr object,
967     * as well as an appropriate className set on the html element
968     *
969     * @param feature - String naming the feature
970     * @param test - Function returning true if feature is supported, false if not
971     */
972    Modernizr.addTest = function (feature, test) {
973        if (typeof feature == 'object') {
974            for (var key in feature) {
975                if (hasOwnProp(feature, key)) {
976                    Modernizr.addTest(key, feature[key]);
977                }
978            }
979        } else {
980
981            feature = feature.toLowerCase();
982
983            if (Modernizr[feature] !== undefined) {
984                // we're going to quit if you're trying to overwrite an existing test
985                // if we were to allow it, we'd do this:
986                //   var re = new RegExp("\\b(no-)?" + feature + "\\b");
987                //   docElement.className = docElement.className.replace( re, '' );
988                // but, no rly, stuff 'em.
989                return Modernizr;
990            }
991
992            test = typeof test == 'function' ? test() : test;
993
994            if (typeof enableClasses !== "undefined" && enableClasses) {
995                docElement.className += ' ' + (test ? '' : 'no-') + feature;
996            }
997            Modernizr[feature] = test;
998
999        }
1000
1001        return Modernizr; // allow chaining.
1002    };
1003
1004
1005    // Reset modElem.cssText to nothing to reduce memory footprint.
1006    setCss('');
1007    modElem = inputElem = null;
1008
1009    /*>>shiv*/
1010    (function (window, document) {
1011        /*jshint evil:true */
1012        /** version */
1013        var version = '3.7.0';
1014
1015        /** Preset options */
1016        var options = window.html5 || {};
1017
1018        /** Used to skip problem elements */
1019        var reSkip = /^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;
1020
1021        /** Not all elements can be cloned in IE **/
1022        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;
1023
1024        /** Detect whether the browser supports default html5 styles */
1025        var supportsHtml5Styles;
1026
1027        /** Name of the expando, to work with multiple documents or to re-shiv one document */
1028        var expando = '_html5shiv';
1029
1030        /** The id for the the documents expando */
1031        var expanID = 0;
1032
1033        /** Cached data for each document */
1034        var expandoData = {};
1035
1036        /** Detect whether the browser supports unknown elements */
1037        var supportsUnknownElements;
1038
1039        (function () {
1040            try {
1041                var a = document.createElement('a');
1042                a.innerHTML = '<xyz></xyz>';
1043                //if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles
1044                supportsHtml5Styles = ('hidden' in a);
1045
1046                supportsUnknownElements = a.childNodes.length == 1 || (function () {
1047                    // assign a false positive if unable to shiv
1048                    (document.createElement)('a');
1049                    var frag = document.createDocumentFragment();
1050                    return (
1051                        typeof frag.cloneNode == 'undefined' ||
1052                        typeof frag.createDocumentFragment == 'undefined' ||
1053                        typeof frag.createElement == 'undefined'
1054                    );
1055                }());
1056            } catch (e) {
1057                // assign a false positive if detection fails => unable to shiv
1058                supportsHtml5Styles = true;
1059                supportsUnknownElements = true;
1060            }
1061
1062        }());
1063
1064        /*--------------------------------------------------------------------------*/
1065
1066        /**
1067         * Creates a style sheet with the given CSS text and adds it to the document.
1068         * @private
1069         * @param {Document} ownerDocument The document.
1070         * @param {String} cssText The CSS text.
1071         * @returns {StyleSheet} The style element.
1072         */
1073        function addStyleSheet(ownerDocument, cssText) {
1074            var p = ownerDocument.createElement('p'),
1075                parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;
1076
1077            p.innerHTML = 'x<style>' + cssText + '</style>';
1078            return parent.insertBefore(p.lastChild, parent.firstChild);
1079        }
1080
1081        /**
1082         * Returns the value of `html5.elements` as an array.
1083         * @private
1084         * @returns {Array} An array of shived element node names.
1085         */
1086        function getElements() {
1087            var elements = html5.elements;
1088            return typeof elements == 'string' ? elements.split(' ') : elements;
1089        }
1090
1091        /**
1092         * Returns the data associated to the given document
1093         * @private
1094         * @param {Document} ownerDocument The document.
1095         * @returns {Object} An object of data.
1096         */
1097        function getExpandoData(ownerDocument) {
1098            var data = expandoData[ownerDocument[expando]];
1099            if (!data) {
1100                data = {};
1101                expanID++;
1102                ownerDocument[expando] = expanID;
1103                expandoData[expanID] = data;
1104            }
1105            return data;
1106        }
1107
1108        /**
1109         * returns a shived element for the given nodeName and document
1110         * @memberOf html5
1111         * @param {String} nodeName name of the element
1112         * @param {Document} ownerDocument The context document.
1113         * @returns {Object} The shived element.
1114         */
1115        function createElement(nodeName, ownerDocument, data) {
1116            if (!ownerDocument) {
1117                ownerDocument = document;
1118            }
1119            if (supportsUnknownElements) {
1120                return ownerDocument.createElement(nodeName);
1121            }
1122            if (!data) {
1123                data = getExpandoData(ownerDocument);
1124            }
1125            var node;
1126
1127            if (data.cache[nodeName]) {
1128                node = data.cache[nodeName].cloneNode();
1129            } else if (saveClones.test(nodeName)) {
1130                node = (data.cache[nodeName] = data.createElem(nodeName)).cloneNode();
1131            } else {
1132                node = data.createElem(nodeName);
1133            }
1134
1135            // Avoid adding some elements to fragments in IE < 9 because
1136            // * Attributes like `name` or `type` cannot be set/changed once an element
1137            //   is inserted into a document/fragment
1138            // * Link elements with `src` attributes that are inaccessible, as with
1139            //   a 403 response, will cause the tab/window to crash
1140            // * Script elements appended to fragments will execute when their `src`
1141            //   or `text` property is set
1142            return node.canHaveChildren && !reSkip.test(nodeName) && !node.tagUrn ? data.frag.appendChild(node) : node;
1143        }
1144
1145        /**
1146         * returns a shived DocumentFragment for the given document
1147         * @memberOf html5
1148         * @param {Document} ownerDocument The context document.
1149         * @returns {Object} The shived DocumentFragment.
1150         */
1151        function createDocumentFragment(ownerDocument, data) {
1152            if (!ownerDocument) {
1153                ownerDocument = document;
1154            }
1155            if (supportsUnknownElements) {
1156                return ownerDocument.createDocumentFragment();
1157            }
1158            data = data || getExpandoData(ownerDocument);
1159            var clone = data.frag.cloneNode(),
1160                i = 0,
1161                elems = getElements(),
1162                l = elems.length;
1163            for (; i < l; i++) {
1164                clone.createElement(elems[i]);
1165            }
1166            return clone;
1167        }
1168
1169        /**
1170         * Shivs the `createElement` and `createDocumentFragment` methods of the document.
1171         * @private
1172         * @param {Document|DocumentFragment} ownerDocument The document.
1173         * @param {Object} data of the document.
1174         */
1175        function shivMethods(ownerDocument, data) {
1176            if (!data.cache) {
1177                data.cache = {};
1178                data.createElem = ownerDocument.createElement;
1179                data.createFrag = ownerDocument.createDocumentFragment;
1180                data.frag = data.createFrag();
1181            }
1182
1183
1184            ownerDocument.createElement = function (nodeName) {
1185                //abort shiv
1186                if (!html5.shivMethods) {
1187                    return data.createElem(nodeName);
1188                }
1189                return createElement(nodeName, ownerDocument, data);
1190            };
1191
1192            ownerDocument.createDocumentFragment = Function('h,f', 'return function(){' +
1193                'var n=f.cloneNode(),c=n.createElement;' +
1194                'h.shivMethods&&(' +
1195                // unroll the `createElement` calls
1196                getElements().join().replace(/[\w\-]+/g, function (nodeName) {
1197                    data.createElem(nodeName);
1198                    data.frag.createElement(nodeName);
1199                    return 'c("' + nodeName + '")';
1200                }) +
1201                ');return n}'
1202            )(html5, data.frag);
1203        }
1204
1205        /*--------------------------------------------------------------------------*/
1206
1207        /**
1208         * Shivs the given document.
1209         * @memberOf html5
1210         * @param {Document} ownerDocument The document to shiv.
1211         * @returns {Document} The shived document.
1212         */
1213        function shivDocument(ownerDocument) {
1214            if (!ownerDocument) {
1215                ownerDocument = document;
1216            }
1217            var data = getExpandoData(ownerDocument);
1218
1219            if (html5.shivCSS && !supportsHtml5Styles && !data.hasCSS) {
1220                data.hasCSS = !!addStyleSheet(ownerDocument,
1221                    // corrects block display not defined in IE6/7/8/9
1222                    'article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{dis