Javascript dynamic style adding (intra-row/Embedded/external chain Rules)

Source: Internet
Author: User

CSS can be added in-row, embedded, external chain, and pilot type.
A) dynamically introduce the style sheet file:
Copy codeThe Code is as follows:
Function loadLink (url ){
Var link = document. createElement ("link ");
Link. type = "text/css ";
Link. rel = "stylesheet ";
Link. href = url;
Var head = document. getElmentsByTagName ("head") [0];
Head. appendChild (link );
}

B) embedded:
Copy codeThe Code is as follows:
Function insertStyles (){
Var doc, cssCode = [], cssText;
Var len = arguments. length;
Var head, style, firstStyle;
If (len = 1 ){
Doc = document;
CssCode. push (arguments [0])
} Else if (len = 2 ){
Doc = arguments [0];
CssCode. push (arguments [1]);
} Else {
Alert ("the function can receive up to two parameters! ");
}
Head = doc. getElementsByTagName ("head") [0];
Styles = head. getElementsByTagName ("style ");
If (styles. length = 0 ){
If (doc. createStyleSheet) {// ie
Doc. createStyleSheet ();
} Else {// FF
Var tempStyle = doc. createElement ("style ");
TempStyle. setatti.pdf ("type", "text/css ");
Head. appendChild (tempStyle );
}
}
FirstStyle = styles [0];
CssText = cssCode. join ("\ n ");
If (! + "\ V1") {// opacity compatibility
Var str = cssText. match (/opacity :( \ d? \. \ D + );/);
If (str! = Null ){
CssText = cssText. replace (str [0], "filter: alpha (opacity =" + pareFloat (str [1]) * 100 + ")");
}
}
If (firstStyle. styleSheet ){
FirstStyle.styleSheee.css Text + = cssText;
} Else if (doc. getBoxObjectFor ){
FirstStyle. innerHTML + = cssText;
} Else {
FirstStyle. appendChild (doc. createTextNode (cssText ));
}
}

C) inline:
Copy codeThe Code is as follows:
Var addStyle = function (ele, str ){
Var s = ele. getAttribute ("style"), styles;
If (str & typeof str = "string "){
If (! S ){
Ele.style.css Text = str;
} Else {
If (s = '[object]') {// IE6/7 e. getAttribute ("style") Returns [object]
S=ele.style.css Text;
}
Styles = trim (s). split (";");
For (var I = 0, len = styles. length; I <len; I ++ ){
Var style_ I = trim (styles [I]);
Var attr = style_ I .split (":") [0];
If (str. indexOf (attr)>-1 ){
Styles [I] = "";
} Else {
Styles [I] = style_ I;
}
}
Ele.style.css Text = styles. join ("") + ";" + str;
}
}
}

D) import:
Import "index.css ";
Methods related to CSS operations:
Copy codeThe Code is as follows:
Var hasClass = function (ele, value ){
Var rclass =/[\ n \ t \ r]/g,
Value = "" + value + "";
Return (ele. nodeType = 1) & ("" + ele. className + ""). replace (rclass, ""). indexOf (value)>-1;
}
Var trim = function (val ){
Return val. replace (/(^ \ s +) | (\ s + $)/g ,"");
}
Var addClass = function (ele, value ){
Var rspace =/\ s +/, classNames, getClass;
If (value & typeof value = "string "){
ClassNames = value. split (rspace );
If (ele. nodeType = 1 ){
If (! Ele. className & classNames. length = 1 ){
Ele. className = value;
} Else {
GetClass = "" + ele. className + "";
For (var I = 0, len = classNames. length; I <len; I ++ ){
Var cname = classNames [I];
If (! HasClass (ele, cname )){
GetClass + = cname + "";
}
}
Ele. className = trim (getClass );
}
}
}
}
Var removeClass = function (ele, value ){
Var rclass =/[\ n \ t \ r]/g, classNames, getClass;
If (value & typeof value = "string") | value = undefined ){
ClassNames = (value | ""). split (rspace );
If (ele. nodeType ===1 & ele. className ){
If (value) {// There is a search for the class to be removed
GetClass = "" + ele. className + "". replace (rclass, ""); // left and right spaces. To ensure equality among classes, it is convenient to replace later
For (var I = 0, len = classNames. length; I <len; I ++ ){
GetClass = getClass. replace ("" + classNames [I] + "","")
}
Ele. className = trim (getClass );
} Else {// none remove all classes
Ele. className = "";
}
}
}
}
Var toggleClass = function (ele, value ){
If (typeof value = "string "){
If (hasClass (ele, value )){
RemoveClass (ele, value );
} Else {
AddClass (ele, value );
}
}
}

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.