html5shiv-兼容处理文件

 

让IE8支持HTML5 标签

使用Javascript来使不支持HTML5的浏览器支持HTML标签。目前很多网站采用的这种方式。

针对IE浏览器比较好的解决方案是html5shiv。htnl5shiv主要解决HTML5提出的新的元素不被IE6-8识别，这些新元素不能作为父节点包裹子元素，并且不能应用CSS样式。让CSS 样式应用在未知元素上只需执行 document.createElement(elementName) 即可实现。html5shiv就是根据这个原理创建的。

html5shiv的使用非常的简单，考虑到IE9是支持html5的，所以只需要在页面head中添加如下代码即可：

<!--[if lt IE 9]>
    <script type="text/javascript" src="scripts/html5shiv.js"></script>
<![endif]-->

/**
* @preserve HTML5 Shiv 3.7.2 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
*/
;(function(window, document) {
/*jshint evil:true */
  /** version */
  var version = '3.7.2';

  /** 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;
  }

  /**
   * Extends the built-in list of html5 elements
   * @memberOf html5
   * @param {String|Array} newElements whitespace separated list or array of new element names to shiv
   * @param {Document} ownerDocument The context document.
   */
  function addElements(newElements, ownerDocument) {
    var elements = html5.elements;
    if(typeof elements != 'string'){
      elements = elements.join(' ');
    }
    if(typeof newElements != 'string'){
      newElements = newElements.join(' ');
    }
    html5.elements = elements +' '+ newElements;
    shivDocument(ownerDocument);
  }

   /**
   * 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 picture 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,

    //extends list of elements
    addElements: addElements
  };

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

  // expose html5
  window.html5 = html5;

  // shiv the document
  shivDocument(document);

}(this, document));

 

压缩版本

/**
* @preserve HTML5 Shiv 3.7.2 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
*/
!function(a,b){function c(a,b){var c=a.createElement("p"),d=a.getElementsByTagName("head")[0]||a.documentElement;return c.innerHTML="x<style>"+b+"</style>",d.insertBefore(c.lastChild,d.firstChild)}function d(){var a=t.elements;return"string"==typeof a?a.split(" "):a}function e(a,b){var c=t.elements;"string"!=typeof c&&(c=c.join(" ")),"string"!=typeof a&&(a=a.join(" ")),t.elements=c+" "+a,j(b)}function f(a){var b=s[a[q]];return b||(b={},r++,a[q]=r,s[r]=b),b}function g(a,c,d){if(c||(c=b),l)return c.createElement(a);d||(d=f(c));var e;return e=d.cache[a]?d.cache[a].cloneNode():p.test(a)?(d.cache[a]=d.createElem(a)).cloneNode():d.createElem(a),!e.canHaveChildren||o.test(a)||e.tagUrn?e:d.frag.appendChild(e)}function h(a,c){if(a||(a=b),l)return a.createDocumentFragment();c=c||f(a);for(var e=c.frag.cloneNode(),g=0,h=d(),i=h.length;i>g;g++)e.createElement(h[g]);return e}function i(a,b){b.cache||(b.cache={},b.createElem=a.createElement,b.createFrag=a.createDocumentFragment,b.frag=b.createFrag()),a.createElement=function(c){return t.shivMethods?g(c,a,b):b.createElem(c)},a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+d().join().replace(/[\w\-:]+/g,function(a){return b.createElem(a),b.frag.createElement(a),'c("'+a+'")'})+");return n}")(t,b.frag)}function j(a){a||(a=b);var d=f(a);return!t.shivCSS||k||d.hasCSS||(d.hasCSS=!!c(a,"article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}mark{background:#FF0;color:#000}template{display:none}")),l||i(a,d),a}var k,l,m="3.7.2",n=a.html5||{},o=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,p=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,q="_html5shiv",r=0,s={};!function(){try{var a=b.createElement("a");a.innerHTML="<xyz></xyz>",k="hidden"in a,l=1==a.childNodes.length||function(){b.createElement("a");var a=b.createDocumentFragment();return"undefined"==typeof a.cloneNode||"undefined"==typeof a.createDocumentFragment||"undefined"==typeof a.createElement}()}catch(c){k=!0,l=!0}}();var t={elements:n.elements||"abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output picture progress section summary template time video",version:m,shivCSS:n.shivCSS!==!1,supportsUnknownElements:l,shivMethods:n.shivMethods!==!1,type:"default",shivDocument:j,createElement:g,createDocumentFragment:h,addElements:e};a.html5=t,j(b)}(this,document);