CODE EXAMPLE FOR JAVASCRIPT

Vue router guard

router.beforeEach((to, from, next) => {
  const publicPages = ['/login', '/register', '/home'];
  const authRequired = !publicPages.includes(to.path);
  const loggedIn = localStorage.getItem('user');

  if (authRequired && !loggedIn) {
    next('/profile');
  } else {
    next();
  }
});