当我们使用h5的新标签,header,footer,aside,section,article...时，会遇到低版本IE不兼容问题，如下图：
解决方案：引入如下JS代码，即可
（这里我就直接放源码了，大家可自行拷贝成JS文件即可使用）
/*! HTML5 Shiv v3.6.1 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed */
;(function(window, document) {
/*jshint evil:true */
/** 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 = ; /** 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 == || (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) {
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')[] || 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) ? 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 = ,
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,figcaption,figure,footer,header,hgroup,nav,section{display:block}' +
// adds styling not present in IE6/7/8/9
'mark{background:#FF0;color:#000}'
);
}
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 figcaption figure footer header hgroup mark meter nav output progress section summary time video', /**
* 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));
