How do I implement async router guards in Vue 3?

How do I implement async router guards in Vue 3?

In Vue 3, you can implement async router guards by returning a Promise in your guard function. This allows you to perform asynchronous operations before navigating to a route.

Can you show me an example of an async router guard?

Sure! Here's a simple example:

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

What is the purpose of using async in router guards?

Using async in router guards allows you to handle operations like API calls or authentication checks that take time to complete. It ensures that the navigation only proceeds once these operations are finished.

Are there any best practices for using async router guards?

Yes, some best practices include keeping your guards lightweight, handling errors gracefully, and avoiding unnecessary async calls to improve performance.