Javascript object array Turkish sorting. Türkçe Sıralama

turkce_siralama.js

var arr = [{id:3,title:"Ali"},{id:3,title:"Veli"},{id:3,title:"Vehbi"}];
arr.sort(turkcesiralama);

function turkcesiralama(a, b,aProp="title",bProp="title"){
    var atitle = a[aProp];
    var btitle = b[bProp];
    var alfabe = "AaBbCcÇçDdEeFfGgĞğHhIıİiJjKkLlMmNnOoÖöPpQqRrSsŞşTtUuÜüVvWwXxYyZz0123456789";
    if (atitle.length === 0 || btitle.length === 0) {
        return atitle.length - btitle.length;
    }
    for(var i=0;i<atitle.length && i<btitle.length;i++){
        var ai = alfabe.indexOf(atitle[i]);
        var bi = alfabe.indexOf(btitle[i]);
        if (ai !== bi) {
            return ai - bi;
        }
    }
}