https://balancegurus.com/blog_assets/js/vendor/jquery.style.switcher.js

1(function($){var jStyleSwitcher,_defaultOptions={hasPreview:true,defaultThemeId:'jssDefault',fullPath:'css/',cookie:{expires:"",isManagingLoad:true}},_cookieKey='jss_selected',_docCookies={};_docCookies={getItem:function(sKey){if(!sKey){return null;}return decodeURIComponent(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*"+encodeURIComponent(sKey).replace(/[\-\.\+\*]/g,"\\$&")+"\\s*\\=\\s*([^;]*).*$)|^.*$"),"$1"))||null;},setItem:function(sKey,sValue,vEnd,sPath,sDomain,bSecure){if(!sKey||/^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)){return false;}var sExpires="";if(vEnd){switch(vEnd.constructor){case Number:sExpires=vEnd===Infinity?"; expires=Fri, 31 Dec 9999 23:59:59 GMT":"; max-age="+vEnd;break;case String:sExpires="; expires="+vEnd;break;case Date:sExpires="; expires="+vEnd.toUTCString();break;}}document.cookie=encodeURIComponent(sKey)+"="+encodeURIComponent(sValue)+sExpires+(sDomain?"; domain="+sDomain:"")+(sPath?"; path="+sPath:"")+(bSecure?"; secure":"");return true;},removeItem:function(sKey,sPath,sDomain){if(!this.hasItem(sKey)){return false;}document.cookie=encodeURIComponent(sKey)+"=; expires=Thu, 01 Jan 1970 00:00:00 GMT"+(sDomain?"; domain="+sDomain:"")+(sPath?"; path="+sPath:"");return true;},hasItem:function(sKey){if(!sKey){return false;}return(new RegExp("(?:^|;\\s*)"+encodeURIComponent(sKey).replace(/[\-\.\+\*]/g,"\\$&")+"\\s*\\=")).test(document.cookie);},keys:function(){var aKeys=document.cookie.replace(/((?:^|\s*;)[^\=]+)(?=;|$)|^\s*|\s*(?:\=[^;]*)?(?:\1|$)/g,"").split(/\s*(?:\=[^;]*)?;\s*/);for(var nLen=aKeys.length,nIdx=0;nIdx<nLen;nIdx++){aKeys[nIdx]=decodeURIComponent(aKeys[nIdx]);}return aKeys;}};jStyleSwitcher=function($root,config){return this.init($root,config);};jStyleSwitcher.prototype={$root:null,config:{},$themeCss:null,defaultTheme:null,init:function($root,config){this.$root=$root;this.config=config?config:{};this.setDefaultTheme();if(this.defaultTheme){if(this.config.cookie){this.checkCookie();}if(this.config.hasPreview){this.addHoverEvents();}this.addClickEvents();}else{this.$root.addClass('jssError error level0');}},setDefaultTheme:function(){this.$themeCss=$('link[id='+this.config.defaultThemeId+']');if(this.$themeCss.length){this.defaultTheme=this.$themeCss.attr('href');}},resetStyle:function(){this.updateStyle(this.defaultTheme);},updateStyle:function(newStyle){this.$themeCss.attr('href',newStyle);},getFullAssetPath:function(asset){return this.config.fullPath+asset+'.css';},checkCookie:function(){var styleCookie;if(this.config.cookie&&this.config.cookie.isManagingLoad){styleCookie=_docCookies.getItem(_cookieKey);if(styleCookie){newStyle=this.getFullAssetPath(styleCookie);this.updateStyle(newStyle);this.defaultTheme=newStyle;}}},addHoverEvents:function(){var self=this;this.$root.find('a').hover(function(){var asset=$(this).data('theme'),newStyle=self.getFullAssetPath(asset);self.updateStyle(newStyle);},function(){self.resetStyle();});},addClickEvents:function(){var self=this;this.$root.find('.setColor').on('click',function(){var asset=$(this).data('theme'),newStyle=self.getFullAssetPath(asset);self.updateStyle(newStyle);self.defaultTheme=newStyle;if(self.config.cookie){_docCookies.setItem(_cookieKey,asset,self.config.cookie.expires,'/');}});}};$.fn.styleSwitcher=function(options){return new jStyleSwitcher(this,$.extend(true,_defaultOptions,options));};function createCookie(name,value,days){var expires;if(days){var date=new Date();date.setTime(date.getTime()+(days*24*60*60*1000));expires="; expires="+date.toGMTString();}else{expires="";}document.cookie=encodeURIComponent(name)+"="+encodeURIComponent(value)+expires+"; path=/";}function readCookie(name){var nameEQ=encodeURIComponent(name)+"=";var ca=document.cookie.split(';');for(var i=0;i<ca.length;i++){var c=ca[i];while(c.charAt(0)===' ')c=c.substring(1,c.length);if(c.indexOf(nameEQ)===0)return decodeURIComponent(c.substring(nameEQ.length,c.length));}return null;}function eraseCookie(name){createCookie(name,"",-1);}$(function(){function setStyleCookie(){styleCookieVal=$('body').hasClass('active-dark-mode')?'dark':'light';Cookies.set('styleCookieName',styleCookieVal,{expires:7});}if(Cookies.get('styleCookieName')=='dark'){$('body').addClass('active-dark-mode');}else if(Cookies.get('styleCookieName')=='light'){$('body').removeClass('active-light-mode');}else{$('body').removeClass('active-light-mode');}

1var activeStyle=Cookies.get('styleCookieName');if(activeStyle=="dark"){$('#my_switcher').find('.setColor.dark').addClass('active');$('body').removeClass('active-light-mode').addClass('active-dark-mode');}else if(activeStyle=="light"){$('#my_switcher').find('.setColor.light').addClass('active');$('body').removeClass('active-dark-mode').addClass('active-light-mode');}else{if($("body").hasClass("active-dark-mode")){$('#my_switcher').find('.setColor.light').removeClass('active');$('#my_switcher').find('.setColor.dark').addClass('active');}else{$('#my_switcher').find('.setColor.dark').removeClass('active');$('#my_switcher').find('.setColor.light').addClass('active');}}$('#my_switcher .setColor').on('click',function(){$(this).closest('ul').find('li').siblings().find('.active').removeClass('active');$(this).addClass('active');setStyleCookie();});$('#my_switcher .setColor.dark').on('click',function(){$('body').removeClass('active-light-mode').addClass('active-dark-mode');setStyleCookie();});$('#my_switcher .setColor.light').on('click',function(){$('body').removeClass('active-dark-mode').addClass('active-light-mode');setStyleCookie();});});})(jQuery);