modernizr.js

    // 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 = '<xyz></xyz>';
            //if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles
            supportsHtml5Styles = ('hidden' in a);

            supportsUnknownElements = a.childNodes.length == 1 || (function() {
              // assign a false positive if unable to shiv
              (document.createElement)('a');
              var frag = document.createDocumentFragment();
              return (
                typeof frag.cloneNode == 'undefined' ||
                typeof frag.createDocumentFragment == 'undefined' ||
                typeof frag.createElement == 'undefined'
              );
            }());
          } catch(e) {
            // assign a false positive if detection fails => unable to shiv
            supportsHtml5Styles = true;
            supportsUnknownElements = true;
          }

        }());

        /*--------------------------------------------------------------------------*/

        /**
         * Creates a style sheet with the given CSS text and adds it to the document.
         * @private
         * @param {Document} ownerDocument The document.
         * @param {String} cssText The CSS text.
         * @returns {StyleSheet} The style element.
         */
        function addStyleSheet(ownerDocument, cssText) {
          var p = ownerDocument.createElement('p'),
          parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;

          p.innerHTML = 'x<style>' + cssText + '</style>';
          return parent.insertBefore(p.lastChild, parent.firstChild);
        }

        /**
         * Returns the value of `html5.elements` as an array.
         * @private
         * @returns {Array} An array of shived element node names.
         */
        function getElements() {
          var elements = html5.elements;
          return typeof elements == 'string' ? elements.split(' ') : elements;
        }

        /**
         * 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<l;i++){
            clone.createElement(elems[i]);
          }
          return clone;
        }

        /**
         * Shivs the `createElement` and `createDocumentFragment` methods of the document.
         * @private
         * @param {Document|DocumentFragment} ownerDocument The document.
         * @param {Object} data of the document.
         */
        function shivMethods(ownerDocument, data) {
          if (!data.cache) {
            data.cache = {};
            data.createElem = ownerDocument.createElement;
            data.createFrag = ownerDocument.createDocumentFragment;
            data.frag = data.createFrag();
          }


          ownerDocument.createElement = function(nodeName) {
            //abort shiv
            if (!html5.shivMethods) {
              return data.createElem(nodeName);
            }
            return createElement(nodeName, ownerDocument, data);
          };

          ownerDocument.createDocumentFragment = Function('h,f', 'return function(){' +
                                                          'var n=f.cloneNode(),c=n.createElement;' +
                                                          'h.shivMethods&&(' +
                                                          // unroll the `createElement` calls
                                                          getElements().join().replace(/[\w\-]+/g, function(nodeName) {
            data.createElem(nodeName);
            data.frag.createElement(nodeName);
            return 'c("' + nodeName + '")';
          }) +
            ');return n}'
                                                         )(html5, data.frag);
        }

        /*--------------------------------------------------------------------------*/

        /**
         * Shivs the given document.
         * @memberOf html5
         * @param {Document} ownerDocument The document to shiv.
         * @returns {Document} The shived document.
         */
        function shivDocument(ownerDocument) {
          if (!ownerDocument) {
            ownerDocument = document;
          }
          var data = getExpandoData(ownerDocument);

          if (html5.shivCSS && !supportsHtml5Styles && !data.hasCSS) {
            data.hasCSS = !!addStyleSheet(ownerDocument,
                                          // corrects block display not defined in IE6/7/8/9
                                          'article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}' +
                                            // adds styling not present in IE6/7/8/9
                                            'mark{background:#FF0;color:#000}' +
                                            // hides non-rendered elements
                                            'template{display:none}'
                                         );
          }
          if (!supportsUnknownElements) {
            shivMethods(ownerDocument, data);
          }
          return ownerDocument;
        }

        /*--------------------------------------------------------------------------*/

        /**
         * The `html5` object is exposed so that more elements can be shived and
         * existing shiving can be detected on iframes.
         * @type Object
         * @example
         *
         * // options can be changed before the script is included
         * html5 = { 'elements': 'mark section', 'shivCSS': false, 'shivMethods': false };
         */
        var html5 = {

          /**
           * An array or space separated string of node names of the elements to shiv.
           * @memberOf html5
           * @type Array|String
           */
          'elements': options.elements || 'abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output progress section summary template time video',

          /**
           * current version of html5shiv
           */
          'version': version,

          /**
           * A flag to indicate that the HTML5 style sheet should be inserted.
           * @memberOf html5
           * @type Boolean
           */
          'shivCSS': (options.shivCSS !== false),

          /**
           * Is equal to true if a browser supports creating unknown/HTML5 elements
           * @memberOf html5
           * @type boolean
           */
          'supportsUnknownElements': supportsUnknownElements,

          /**
           * A flag to indicate that the document's `createElement` and `createDocumentFragment`
           * methods should be overwritten.
           * @memberOf html5
           * @type Boolean
           */
          'shivMethods': (options.shivMethods !== false),

          /**
           * A string to describe the type of `html5` object ("default" or "default print").
           * @memberOf html5
           * @type String
           */
          'type': 'default',

          // shivs the document according to the specified `html5` object options
          'shivDocument': shivDocument,

          //creates a shived element
          createElement: createElement,

          //creates a shived documentFragment
          createDocumentFragment: createDocumentFragment
        };

        /*--------------------------------------------------------------------------*/

        // expose html5
        window.html5 = html5;

        // shiv the document
        shivDocument(document);

    }(this, document));
    /*>>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 <html> element, if it exists:
    docElement.className = docElement.className.replace(/(^|\s)no-js(\s|$)/, '$1$2') +

                            // Add the new classes to the <html> element.
                            (enableClasses ? ' js ' + classes.join(' ') : '');
    /*>>cssclasses*/

    return Modernizr;

})(this, this.document);