What are async navigation guards in Vue 3?

What are async navigation guards in Vue 3?

Async navigation guards in Vue 3 are functions that allow you to control access to routes asynchronously. They can be used to fetch data or check user permissions before navigating to a route.

Can you give me an example of how to implement one?

Sure! You can define an async navigation guard in your router configuration like this:

const router = new VueRouter({
  routes: [
    {
      path: '/protected',
      component: ProtectedComponent,
      beforeEnter: async (to, from, next) => {
        const isAuthenticated = await checkAuth();
        if (isAuthenticated) {
          next();
        } else {
          next('/login');
        }
      }
    }
  ]
});

What happens if the async guard takes too long?

If the async guard takes too long, it can delay the navigation. It's important to ensure that the async operations are optimized and handle timeouts appropriately to improve user experience.

Are there any best practices for using async navigation guards?

Yes, some best practices include keeping the logic simple, handling errors gracefully, and ensuring that the async operations are efficient to avoid blocking the navigation.