jQuery 中关于CSS操作部分使用说明
更新时间:2007年06月10日 00:00:00 作者:
刚刚看了下jQuery的源代码,其中关于CSS及className的操作思想确实很不错,值得借鉴。
其中关于jQuery.className.has的定义部分,是用的正则来实现的,其实此处直接利用Javascript中String对象的indexOf方法来作处理的话,比用正则效率会更些,因此
jQuery.className.has的定义可以改进成:
has: function( t, c ) {
t = t.className || t;
t = " " + t + " ";
c = " " + c + " ";
return t.indexOf(c)>-1;
}
原代码中关于CSS及className的操作部分节选如下:
className: {
// internal only, use addClass("class")
add: function( elem, c ){
jQuery.each( c.split(/\s+/), function(i, cur){
if ( !jQuery.className.has( elem.className, cur ) )
elem.className += ( elem.className ? " " : "" ) + cur;
});
},
// internal only, use removeClass("class")
remove: function( elem, c ){
elem.className = c ?
jQuery.grep( elem.className.split(/\s+/), function(cur){
return !jQuery.className.has( c, cur );
}).join(" ") : "";
},
// internal only, use is(".class")
has: function( t, c ) {
t = t.className || t;
// escape regex characters
c = c.replace(/([\.\\\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:])/g, "\\$1");
return t && new RegExp("(^|\\s)" + c + "(\\s|$)").test( t );
}
},
swap: function(e,o,f) {
for ( var i in o ) {
e.style["old"+i] = e.style[i];
e.style[i] = o[i];
}
f.apply( e, [] );
for ( var i in o )
e.style[i] = e.style["old"+i];
},
css: function(e,p) {
if ( p == "height" || p == "width" ) {
var old = {}, oHeight, oWidth, d = ["Top","Bottom","Right","Left"];
jQuery.each( d, function(){
old["padding" + this] = 0;
old["border" + this + "Width"] = 0;
});
jQuery.swap( e, old, function() {
if (jQuery.css(e,"display") != "none") {
oHeight = e.offsetHeight;
oWidth = e.offsetWidth;
} else {
e = jQuery(e.cloneNode(true))
.find(":radio").removeAttr("checked").end()
.css({
visibility: "hidden", position: "absolute", display: "block", right: "0", left: "0"
}).appendTo(e.parentNode)[0];
var parPos = jQuery.css(e.parentNode,"position");
if ( parPos == "" || parPos == "static" )
e.parentNode.style.position = "relative";
oHeight = e.clientHeight;
oWidth = e.clientWidth;
if ( parPos == "" || parPos == "static" )
e.parentNode.style.position = "static";
e.parentNode.removeChild(e);
}
});
return p == "height" ? oHeight : oWidth;
}
return jQuery.curCSS( e, p );
},
curCSS: function(elem, prop, force) {
var ret;
if (prop == "opacity" && jQuery.browser.msie)
return jQuery.attr(elem.style, "opacity");
if (prop == "float" || prop == "cssFloat")
prop = jQuery.browser.msie ? "styleFloat" : "cssFloat";
if (!force && elem.style[prop])
ret = elem.style[prop];
else if (document.defaultView && document.defaultView.getComputedStyle) {
if (prop == "cssFloat" || prop == "styleFloat")
prop = "float";
prop = prop.replace(/([A-Z])/g,"-$1").toLowerCase();
var cur = document.defaultView.getComputedStyle(elem, null);
if ( cur )
ret = cur.getPropertyValue(prop);
else if ( prop == "display" )
ret = "none";
else
jQuery.swap(elem, { display: "block" }, function() {
var c = document.defaultView.getComputedStyle(this, "");
ret = c && c.getPropertyValue(prop) || "";
});
} else if (elem.currentStyle) {
var newProp = prop.replace(/\-(\w)/g,function(m,c){return c.toUpperCase();});
ret = elem.currentStyle[prop] || elem.currentStyle[newProp];
}
return ret;
},
附录:
jQuery官方网站:http://jquery.com/
jQuery源码下载:http://docs.jquery.com/Downloading_jQuery
jQuery API文档:http://docs.jquery.com/Main_Page
jQuery 中国:http://jquery.org.cn/
VisualJQuery.com : http://visualjquery.com/
其中关于jQuery.className.has的定义部分,是用的正则来实现的,其实此处直接利用Javascript中String对象的indexOf方法来作处理的话,比用正则效率会更些,因此
复制代码 代码如下:
jQuery.className.has的定义可以改进成:
has: function( t, c ) {
t = t.className || t;
t = " " + t + " ";
c = " " + c + " ";
return t.indexOf(c)>-1;
}
原代码中关于CSS及className的操作部分节选如下:
复制代码 代码如下:
className: {
// internal only, use addClass("class")
add: function( elem, c ){
jQuery.each( c.split(/\s+/), function(i, cur){
if ( !jQuery.className.has( elem.className, cur ) )
elem.className += ( elem.className ? " " : "" ) + cur;
});
},
// internal only, use removeClass("class")
remove: function( elem, c ){
elem.className = c ?
jQuery.grep( elem.className.split(/\s+/), function(cur){
return !jQuery.className.has( c, cur );
}).join(" ") : "";
},
// internal only, use is(".class")
has: function( t, c ) {
t = t.className || t;
// escape regex characters
c = c.replace(/([\.\\\+\*\?\[\^\]\$\(\)\{\}\=\!\<\>\|\:])/g, "\\$1");
return t && new RegExp("(^|\\s)" + c + "(\\s|$)").test( t );
}
},
swap: function(e,o,f) {
for ( var i in o ) {
e.style["old"+i] = e.style[i];
e.style[i] = o[i];
}
f.apply( e, [] );
for ( var i in o )
e.style[i] = e.style["old"+i];
},
css: function(e,p) {
if ( p == "height" || p == "width" ) {
var old = {}, oHeight, oWidth, d = ["Top","Bottom","Right","Left"];
jQuery.each( d, function(){
old["padding" + this] = 0;
old["border" + this + "Width"] = 0;
});
jQuery.swap( e, old, function() {
if (jQuery.css(e,"display") != "none") {
oHeight = e.offsetHeight;
oWidth = e.offsetWidth;
} else {
e = jQuery(e.cloneNode(true))
.find(":radio").removeAttr("checked").end()
.css({
visibility: "hidden", position: "absolute", display: "block", right: "0", left: "0"
}).appendTo(e.parentNode)[0];
var parPos = jQuery.css(e.parentNode,"position");
if ( parPos == "" || parPos == "static" )
e.parentNode.style.position = "relative";
oHeight = e.clientHeight;
oWidth = e.clientWidth;
if ( parPos == "" || parPos == "static" )
e.parentNode.style.position = "static";
e.parentNode.removeChild(e);
}
});
return p == "height" ? oHeight : oWidth;
}
return jQuery.curCSS( e, p );
},
curCSS: function(elem, prop, force) {
var ret;
if (prop == "opacity" && jQuery.browser.msie)
return jQuery.attr(elem.style, "opacity");
if (prop == "float" || prop == "cssFloat")
prop = jQuery.browser.msie ? "styleFloat" : "cssFloat";
if (!force && elem.style[prop])
ret = elem.style[prop];
else if (document.defaultView && document.defaultView.getComputedStyle) {
if (prop == "cssFloat" || prop == "styleFloat")
prop = "float";
prop = prop.replace(/([A-Z])/g,"-$1").toLowerCase();
var cur = document.defaultView.getComputedStyle(elem, null);
if ( cur )
ret = cur.getPropertyValue(prop);
else if ( prop == "display" )
ret = "none";
else
jQuery.swap(elem, { display: "block" }, function() {
var c = document.defaultView.getComputedStyle(this, "");
ret = c && c.getPropertyValue(prop) || "";
});
} else if (elem.currentStyle) {
var newProp = prop.replace(/\-(\w)/g,function(m,c){return c.toUpperCase();});
ret = elem.currentStyle[prop] || elem.currentStyle[newProp];
}
return ret;
},
附录:
jQuery官方网站:http://jquery.com/
jQuery源码下载:http://docs.jquery.com/Downloading_jQuery
jQuery API文档:http://docs.jquery.com/Main_Page
jQuery 中国:http://jquery.org.cn/
VisualJQuery.com : http://visualjquery.com/
相关文章
jQuery对checkbox 复选框的全选全不选反选的操作
这篇文章主要介绍了jQuery对checkbox 复选框的全选全不选反选的操作 的相关资料,非常不错,具有参考借鉴价值,需要的朋友可以参考下2016-08-08
asp.net下使用jquery 的ajax+WebService+json 实现无刷新取后台值的实现代码
asp.net下使用jquery 的ajax+WebService+json 实现无刷新取后台值的实现代码 ,比页面刷新更好,用户体验更好,需要的朋友可以参考下。2010-09-09
用jQuery.ajaxSetup实现对请求和响应数据的过滤
本文主要对用jQuery.ajaxSetup实现对请求和响应数据的过滤的过程与方法进行详细全面的实例讲解。具有很好的参考价值,需要的朋友一起来看下吧2016-12-12
如何解决jQuery EasyUI 已打开Tab重新加载问题
最近在项目中遇到这样的需求,要求实现点击左侧已经打开的tab可以刷新重新加载datagrid。下面给大家分享实现代码,一起看看吧2016-12-12


最新评论