How do I implement router guards in Vue.js?

How do I implement router guards in Vue.js?

To implement router guards in Vue.js, you can use the beforeEach method in your router configuration. This allows you to define navigation guards that can control access to routes.

Can you give me an example of a simple authentication guard?

Sure! Here's a basic example:

const router = new VueRouter({
  routes: [
    { path: '/protected', component: ProtectedComponent, meta: { requiresAuth: true } },
    // other routes
  ]
});

router.beforeEach((to, from, next) => {
  const isAuthenticated = // your logic to check authentication;
  if (to.matched.some(record => record.meta.requiresAuth) && !isAuthenticated) {
    next({ path: '/login' });
  } else {
    next();
  }
});

What if I want to add a loading spinner while the guard checks?

You can manage a loading state in your component or Vuex store. Set the loading state to true before the guard checks and false after. You can then show a spinner based on this state.

Are there different types of router guards?

Yes, there are three main types of router guards in Vue.js: global guards, per-route guards, and in-component guards. Each serves different use cases.