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jQuery CssDynamic

A dinamic system to customize style css. It append the rules in the end of body

Este script no debería instalarse directamente. Es una biblioteca que utilizan otros scripts mediante la meta-directiva de inclusión // @require https://update.greatest.deepsurf.us/scripts/26587/169714/jQuery%20CssDynamic.js 

// ==UserScript==
// @author         Matteo Burbui @maxeo90
// @name           jQuery CssDynamic
// @description    A dinamic system to customize style css. It append the rules in the end of body
// @license        https://creativecommons.org/licenses/by-sa/4.0/
// @version        1.1.1
// @grant          none
// ==/UserScript==
(function( $ ){
   $.fn.cssDynamic = function(prop) {
     var selector=$(this).selector;
     var data,fval,action,idStyle,newName;
     
     if(typeof(prop)=='object'){
      fval=1,data='';
      for (var k in prop){
        if (prop.hasOwnProperty(k)) {
          data+=k+':'+prop[k]+';'
        }
      }
     }else if(prop=='rename' && arguments[2]!=undefined ){
       fval=0;
       newName=arguments[2];
     }else if(arguments[1]!=undefined){
       fval=2;
       data=arguments[0]+':'+arguments[1]
     }else if(prop=='remove'){
       fval=0;
     } else{return 'error'}
     action=(arguments[fval]==undefined)?'add':arguments[fval];
     idStyle=(arguments[fval+1]==undefined)?'cssDynamic':arguments[fval+1];
     
     switch(action) {
      case 'new':
        actNew()
        break;
      case 'add':
        actAdd()
        break;
      case 'remove':
        actRemove()
        break;
      case 'renew':
        actRemove()
        actNew()
        break;
      case 'rename':
        actRename()
        break;
     }
     function chData(){
       data=selector+'{'+data+'}'
     }
     function actNew(){
       chData();
       $('body').append('<style id="'+idStyle+'">'+data+'</style>')
     }
     function actAdd(){
       if(!$('#'+idStyle).length){
         actNew()
       }else{
         chData();
         $('style#'+idStyle).append(data)
       }
     }
     function actRemove(){
       $('style#'+idStyle).remove();
     }
     
     function actRename(){
       $('style#'+idStyle).attr('id',newName);
     }
      return this;
   }; 
})( jQuery );