$("#sidebarToggle").on('click',function(e) {
e.preventDefault();
$("body").toggleClass("sidebar-toggled");
$(".sidebar").toggleClass("toggled");
if(!checkCookie("sidebarToggle")){
setCookie("sidebarToggle",0,99);
}
if(getCookie("sidebarToggle") == 1){
setCookie("sidebarToggle",0,99);
}else{
setCookie("sidebarToggle",1,99);
}

});

$(function() {
if(checkCookie("sidebarToggle")){
if(getCookie("sidebarToggle") == 1){
$("body").toggleClass("sidebar-toggled");
$(".sidebar").toggleClass("toggled");
}
}
});

function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}

function getCookie(cname) {
var name = cname + "=";
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);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}

function checkCookie(cookie) {
var ck = getCookie(cookie);
if (ck != "") {
return true;
} else {
return false;
}
}



Aklına takılan olursa sorabilirsin.