export function route(path: string, children: any = {}) {
 const fn = function() {
  return path
 };
 fn.toString = () => path;

 fn.children = children;

 for (let key in children) {
  const item = children[key];
  if (typeof item === 'string') {
   fn[key] = route(path + item);
  } else {
   fn[key] = route(path + item(), item.children);
  }
 }

 return fn
}

const routes = {
 root: route('/'),
 home: route('/home', {
  user: route('/user', {
   notifications: '/notifications',
   settings: '/settings',
  }),
  dashboard: route('/dashboard'),
 }),
};

console.log(routes.home.user.settings());