javascript克隆元素樣式的實(shí)現(xiàn)代碼

更新時(shí)間：2011年10月23日 23:44:14 作者：

這是一個(gè)實(shí)驗(yàn)用的玩意，它可以克隆指定元素的最終樣式，并包裝成一個(gè)css類，它還可以證明Oprea 11.10 是個(gè)混球

 
/** 
* 克隆元素樣式 
* @param {HTMLElement} 被克隆的元素 
* @param {Boolean} 是否啟用緩存（默認(rèn)true） 
* @return {String} css類名 
*/ 
var cloneStyle = (function (doc) { 
var rstyle = /^(number|string)$/, 
cloneName = '${cloneName}', 
sData = {}, 
addHeadStyle = function (content) { 
var style = sData[doc]; 
if (!style) { 
style = sData[doc] = doc.createElement('style'); 
doc.getElementsByTagName('head')[0].appendChild(style); 
}; 
style.styleSheet && (style.styleSheet.cssText += content) || style.appendChild(doc.createTextNode(content)); 
}, 
getStyle = 'getComputedStyle' in window ? function (elem, name) { 
return getComputedStyle(elem, null)[name]; 
} : function (elem, name) { 
return elem.currentStyle[name]; 
}; 
return function (source, cache) { 
if (!cache && source[cloneName]) return source[cloneName]; 
var className, name, 
cssText = [], 
sStyle = source.style; 
for (name in sStyle) { 
val = getStyle(source, name); 
if (val !== '' && rstyle.test(typeof val)) { 
name = name.replace(/([A-Z])/g,"-$1").toLowerCase(); 
cssText.push(name); 
cssText.push(':'); 
cssText.push(val); 
cssText.push(';'); 
}; 
}; 
cssText = cssText.join(''); 
source[cloneName] = className = 'clone' + (new Date).getTime(); 
addHeadStyle('.' + className + '{' + cssText + '}'); 
return className; 
}; 
}(document)); 

演示：

<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>cloneStyle</title> <script type="text/javascript"> /** * 克隆元素樣式 * @author tang bin * @version 0.1 * @see http://www.planeart.cn/?p=1499 * @param {HTMLElement} 被克隆的元素 * @param {Boolean} 是否啟用緩存（默認(rèn)true） * @return {String} css類名 */ var cloneStyle = (function (doc) { var rstyle = /^(number|string)$/, cloneName = '${cloneName}', sData = {}, addHeadStyle = function (content) { var style = sData[doc]; if (!style) { style = sData[doc] = doc.createElement('style'); doc.getElementsByTagName('head')[0].appendChild(style); }; style.styleSheet && (style.styleSheet.cssText += content) || style.appendChild(doc.createTextNode(content)); }, getStyle = 'getComputedStyle' in window ? function (elem, name) { return getComputedStyle(elem, null)[name]; } : function (elem, name) { return elem.currentStyle[name]; }; return function (source, cache) { if (!cache && source[cloneName]) return source[cloneName]; var className, name, cssText = [], sStyle = source.style; for (name in sStyle) { val = getStyle(source, name); if (val !== '' && rstyle.test(typeof val)) { name = name.replace(/([A-Z])/g,"-$1").toLowerCase(); cssText.push(name); cssText.push(':'); cssText.push(val); cssText.push(';'); }; }; cssText = cssText.join(''); source[cloneName] = className = 'clone' + (new Date).getTime(); addHeadStyle('.' + className + '{' + cssText + '}'); return className; }; }(document)); </script> <style> div { width:150px; margin:20px; background:#FBFCFD; border:1px solid #D0DCE8; text-align:center; line-height:3em; font-size:1.5em; } .skin { -webkit-border-radius:5px; -moz-border-radius:5px; border-radius:5px; } #div { width:300px; height:300px; } span { border:1px solid #D0DCE8; color:#F00; } </style> </head> <body> <button onclick="document.getElementById('span').className = cloneStyle(document.getElementById('div'));">克隆div的最終樣式到span</button> <div   class="guq666q"   id="div" class="skin">我是DIV標(biāo)簽</div> <span id="span">我是SPAN標(biāo)簽</span> </body> </html>

[Ctrl+A 全選注:引入外部Js需再刷新一下頁(yè)面才能執(zhí)行]

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