Instructions for CSS operations in jQuery _ jquery

The usage instructions on CSS operations in jQuery have just read the jQuery source code. The operations on CSS and className are really good and worth learning.
For details about jQuery. className. the definition part of has is implemented using regular expressions. In fact, if you directly use the indexOf method of the String object in Javascript for processing, it is more efficient than using regular expressions.

The Code is as follows:

The definition of jQuery. className. has can be improved:
Has: function (t, c ){
T = t. className | t;
T = "" + t + "";
C = "" + c + "";
Return t. indexOf (c)>-1;
}

The operations on CSS and className in the original code are excerpted as follows:

The Code is as follows:

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;
},

Appendix:
JQuery official site: http://jquery.com/href = "http://jquery.com/" target = _ blank> http://jquery.com/
JQuery source code download: http://docs.jquery.com/Downloading_jQuery href = "http://docs.jquery.com/Downloading_jQuery" target = _ blank> http://docs.jquery.com/Downloading_jQuery
JQuery API documentation: http://docs.jquery.com/Main_Page href = "http://docs.jquery.com/Main_Page" target = _ blank> http://docs.jquery.com/Main_Page
JQuery China: http://jquery.org.cn/href = "http://jquery.org.cn/" target = _ blank> http://jquery.org.cn/
VisualJQuery.com: http://visualjquery.com/href = "http://visualjquery.com/" target = _ blank> http://visualjquery.com/