• Django 
class LogoutView():
    def get(self, request):
        del request.COOKIES['sessionid']
  • JS 
delCookie (name) {
    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;path=/';
    document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
}

delCookie ('sessionid')